ПЕРЕПУСКНОЙ КЛАПАН СИСТЕМЫ ВПРЫСКИВАНИЯ ТОПЛИВА

Изобретение может быть использовано в системах топливоподачи двигателей внутреннего сгорания (ДВС). Предложен перепускной клапан (7) системы впрыскивания топлива для ДВС, имеющий по меньшей мере корпус (8), золотник (9) и держатель (11) своей пружины. Согласно изобретению подобный перепускной клапан (7) усовершенствуют касательно его работы с топливом, требовательным к контактирующим с ним материалам. Для этого по меньшей мере одну деталь перепускного клапана (7) предлагается изготавливать из материала, отличного от стали, например пластмассы, обладающей водостойкостью и химической стойкостью. Технический результат - предотвращение возникновения коррозии на деталях перепускного клапана. 3 з.п. ф-лы, 2 ил.

СИСТЕМА ПОДАЧИ ТОПЛИВА ДЛЯ СИСТЕМ ВПРЫСКА ТЯЖЕЛОГО ТОПЛИВА С ОБЩИМ НАГНЕТАТЕЛЬНЫМ ТРУБОПРОВОДОМ

Изобретение относится к двигателестроению, в частности к топливной аппаратуре двигателей внутреннего сгорания. Изобретение позволяет дополнительно усовершенствовать систему подачи топлива так, чтобы износ гнезда клапана и его последствия были снижены, а срок службы и эксплуатационная безопасность продувочного клапана, используемого в такой системе подачи топлива, были усовершенствованы. Система подачи топлива для систем впрыска тяжелого топлива с общим нагнетательным трубопроводом для двигателей внутреннего сгорания включает в себя резервуар, основной подающий насос для подачи тяжелого топлива из резервуара к насосу высокого давления, присоединенному посредством, по меньшей мере, одного трубопровода высокого давления к аккумулятору (нагнетательному трубопроводу) высокого давления, питающего, по меньшей мере, одну форсунку, и, кроме того, продувочный клапан, присоединенный к аккумулятору высокого давления посредством отдельного трубопровода высокого давления для направления, по меньшей мере ...

Anordnung und Ventil zur Entlüftung

Eine Anordnung zum Zuführen von Wasser in den Kraftstoff eines Verbrennungsmotors (1), umfassend einen Tank (2) für das Wasser, eine Wasserpumpe (3) zum Fördern des Wassers vom Tank (2) zu einer Kraftstoff-Hochdruckpumpe (4), ein Dosierventil (5) zum dosierten Fördern des Wassers zu der Kraftstoff-Hochdruckpumpe (4) und einen Druckspeicher (6), in welchen das Wasser vom Tank (2) kommend einleitbar ist und von welchem das Wasser zum Dosierventil (5) führbar ist, ist im Hinblick auf die Aufgabe, einen Motor, insbesondere einen Hochleistungsmotor, so mit Kraftstoff zu versorgen, dass dessen Kraftstoffverbrauch möglichst gering ist, wobei eine Anordnung oder ein Ventil verwendet wird, welches ein möglichst exaktes Dosieren von Kraftstoff oder Kraftstoff-Gemischen ermöglicht, dadurch gekennzeichnet, dass ein Ventil (8) zur Entlüftung des Druckspeichers (6)vorgesehen ist, welches eine Düse (9) zur Limitierung eines Volumenstroms durch das Ventil (8) aufweist.

Housing for high pressure pump of fuel distribution system of vehicle, has valve bore that is deaxial to pump return bore such that connection region formed by pump return bore lies outside of pump return bore

The housing (46) has a pump return bore (52) for discharging fuel from high-pressure pump, valve bore (62) for receiving cylindrical valve, component return bore (56) for discharging fuel from a component of the high-pressure pump. The pump return bore, component return bore and valve bore arranged in a common intersection area are connected. The valve bore is deaxial to pump return bore such that connection region (74) formed by pump return bore lies outside of the pump return bore.

Elektromagnetisch betätigbares Einlassventil und Hochdruckpumpe mit Einlassventil

Es wird ein elektromagnetisch betätigbares Einlassventil (24) für eine Hochdruckpumpe, insbesondere eines Kraftstoffeinspritzsystems, vorgeschlagen. Das Einlassventil (24) weist ein Ventilglied (34) auf, das zwischen einer Öffnungsstellung und einer Schließstellung bewegbar ist. Es ist ein elektromagnetischer Aktor (60) vorgesehen, durch den das Ventilglied (34) bewegbar ist, wobei der elektromagnetische Aktor (60) einen zumindest mittelbar auf das Ventilglied (34) wirkenden Magnetanker (68) aufweist, der über seinen Außenmantel (67) in einer Aufnahme (76) eines Trägerelements (78) in Richtung seiner Längsachse (69) verschiebbar geführt ist. Die Aufnahme (76) und/oder der Magnetanker (68) in seinem Außenmantel (67) weist im Bereich der Führung des Magnetankers (68) wenigstens eine umlaufende Ausnehmung (92; 94; 96) auf.

HOCHDRUCK-KRAFTSTOFFZUFUHRPUMPE

Es wird eine Hochdruck-Kraftstoffzufuhrpumpe mit einem Entlastungsventilmechanismus geschaffen, der die Verschlechterung der Sitzeigenschaft aufgrund des Einflusses der durch das Einpressen während des Einpressens und Befestigen eines Entlastungssitzes verursachten Verformung unterdrücken kann. Um dies zu erreichen, weist ein Entlastungssitz 201 eines Entlastungsventilmechanismus 200 auf seiner inneren Umfangsseite einen Sitzabschnitt 201a, auf dem ein Ventil 202 sitzt, einen Kanalabschnitt 201b mit kleinem Durchmesser, der mit einem kleineren Durchmesser als das Ventil 202 auf einer stromaufwärts gelegenen Seite des Sitzabschnitts 201a ausgebildet ist, und einen Kanalabschnitt 201c mit großem Durchmesser, der mit einem größeren Durchmesser als der Kanalabschnitt 201b mit kleinem Durchmesser auf einer stromaufwärts gelegenen Seite des Kanalabschnitts 201b mit kleinem Durchmesser ausgebildet ist, und auf seiner äußeren Umfangsseite einen Abschnitt 201d eines feinen Spalts, der zwischen dem ...

Kraftstoffeinspritzpumpe

Suction valve for fuel supply system of internal combustion engine, has valve body for intake process, through which fuel reaches from low pressure area of fuel supply system to pump chamber of high pressure pump

The suction valve (1) has a valve body (8) for an intake process, through which fuel reaches from a low pressure area of a fuel supply system to a pump chamber (5) of a high pressure pump. Multiple suction holes (10) are formed, which work together with a radial outer portion (13) of the valve body. A spring element (16) is designed as an externally located spring element, which surrounds the outer side of the valve body.

Kraftstoffhochdruckanordnung

Kraftstoffhochdruckanordnung (10) zum Steuern eines Kraftstoffdruckes (20) eines Kraftstoffeinspritzsystems, aufweisend- einen Kraftstoffhochdruckbereich (16) zum Bereitstellen von druckbeaufschlagtem Kraftstoff (22), und- eine Druckregelventileinrichtung (12) zum Steuern eines Kraftstoffdruckes (20) in dem Kraftstoffhochdruckbereich(16),wobei die Druckregelventileinrichtung (12) außerhalb des Kraftstoffhochdruckbereichs (16) angeordnet ist und eine Drucksensoreinrichtung (14) zum Erfassen des Kraftstoffdruckes (20) in dem Kraftstoffhochdruckbereich (16) aufweist,wobei das Steuern des Kraftstoffdruckes (20) in Abhängigkeit eines Drucksignals der Drucksensoreinrichtung (14) erfolgt,dadurch gekennzeichnet, dasseine Zulaufbohrung (18) zum Zuführen von druckbeaufschlagtem Kraftstoff (22) von dem Kraftstoffhochdruckbereich (16) zu der Druckregelventileinrichtung (12) vorgesehen ist, wobei die Druckregelventileinrichtung (12) ein Dichtelement (24) zum Öffnen und Schließen der Zulaufbohrung (18 ...

Kraftstoffeinspritzvorrichtung für eine Brennkraftmaschine

Verfahren zur Steuerung eines Kraftstoffversorgungssystems einer Brennkraftmaschine

Es wird ein Verfahren zur Steuerung eines Kraftstoffversorgungssystems einer Brennkraftmaschine beschrieben. Bei Stillstand der Brennkraftmaschine wird das Druckbegrenzungsventil durch Vibrationen angeregt.

Brennstoffsystem für eine Rotationsverteilerbrennstoffeinspritzpumpe

Brennstoffeinspritzvorrichtung fuer Brennkraftmaschinen

Fuel injector for internal combustion engine has cam working piston of pump connected to control valves and control system and includes pressure limiting valve

The pressure of fuel in the pressure-limiting valve (60) may overcome a spring of moderate strength using piston with two parts of different diameter. It allows excess fuel to escape to a low- pressure reservoir (24). Control valves (54,59) are connected to a control circuit (56) to regulate flow of high-pressure fuel from the working space of the high-pressure pump (10). Fuel flows through channel (50) to the injector valve (12), to lift the valve body (28) and allow fuel to flow through the injection nozzles (32). The valve is spring-loaded (44) toward its closed position, and has a small control piston (48) and a cylinder with a line running through a working space (49) via throttles (57,58).

Kraftstoffeinspritzeinrichtung mit einer Hochdruckkraftstoffpumpe mit variabler Durchflussmenge

Liquid control valve, especially fuel injection valve, has piezoactuator, actuator stroke converter membrane that seals piezoactuator against control valve, temperature compensator

The liquid control valve has a piezoactuator (2), a converter for converting the actuator's stroke, a control valve (14) operated by the converter and a device (27) for temperature compensation, whereby the converter is in the form of a membrane (3) that seals the piezoactuator against the control valve.

Kraftstoff-Hochdruckpumpe für eine Brennkraftmaschine

Die vorliegende Erfindung betrifft eine Kraftstoff-Hochdruckpumpe (10) für eine Brennkraftmschine mit Direkteinspritzung, mit einem Pumpengehäuse (58), einem einlassseitigen Niederdruckbereich (12) und einem auslassseitigen Hochdruckbereich (14). Die Kraftstoff-Hochdruckpumpe (10) weist dabei eine rein mechanische Druckregeleinrichtung (54) zur Regelung eines konstanten Drucks im Hochdruckbereich (14) auf.

Improvements in fuel injection for internal combustion engines

... 290,184. Hemmingsen, T. V. May 9, 1927, [Convention date]. Relief devices; regulating delivery by opening bye-passes and suction valves.-In a fuel injection pump for internal combustion engines, the suction chamber 5' is separated from the pump chamber 4 by an overflow valve 6, which is opened during the suction stroke of the plunger 2 by a cam 9 and lever 8 and is closed during the delivery stroke by a spring 7 until the cain opens it again in the direction of the pump pressure to interrupt the delivery. The moment at which delivery is interrupted may be varied by adjusting the cam 9 angularly on the shaft 10 by hand or governor. The pump may have a separate spring-loaded delivery valve. The valve 6 serves also as a relief valve.

VALVE STRUCTURE OF A FUEL DISCHARGE VALVE IN A FUEL INJECTION PUMP

Improvements relating to fuel injection systems, for reciprocating internal combustion engines

... 1,030,327. Fuel injection pumps. SULZER BROS. Ltd. Nov. 13, 1963 [Nov. 23, 1962], No. 44853/63. Heading F1A. A fuel injection pump has two throttles 22, 23, in the passage downstream of the spill valve 20 and a damping chamber 30 connected through a third throttle 25 to the space 24 between the throttle 22, 23. The pump delivery and spill valves 10, 20, are controlled by levers 12, 32, pivoted on adjustable eccentrics 14, 34, and actuated by the pump piston 2. The damping chamber may contain a spring located piston or a gas filled rubber sac.

In-line fluid pressure regulator

A miniature in-line fuel pressure regulator having a regulator body that includes a housing member 105 and an adjusting member 115, a pin 110 axially disposed within the regulator body, the pin including an upper end having a circumferential groove 111, a lower end having a fluid inlet (130, fig.1), one or more fluid discharge ports, and a fluid passageway connecting the fluid inlet to the one or more fluid discharge ports 142 and 143, an elastomeric O-ring 120 positioned within the groove on the upper end of the pin so that the O-ring contacts the raised annular valve seat (107, fig.1) when the fluid pressure regulator is closed, and a biasing member coupled to the pin and configured to maintain the elastomeric O-ring in contact with the raised annular valve seat to control an opening pressure of the valve.

Pressure regulator

INJECTOR FOR THE INJECTION OF FUEL INTO COMBUSTION CHAMBERS OF INTERNAL-COMBUSTION ENGINES, IN PARTICULAR PIEZOAKTORGESTEUERTER COMMON RAIL INJECTOR

FUEL INJECTION MECHANISM FOR AN INTERNAL-COMBUSTION ENGINE

FUEL INJECTION VALVE WITH STRENGTH-BALANCED STEUERUND ZUMESS VALVE FOR AN INTERNAL-COMBUSTION ENGINE

Ein Hochdruckmedium führendes Bauelement

In the case of a component which conducts high-pressure medium, comprising a first component (13) with at least one pressure duct (29) and a second component (2) with a pressure chamber (30), wherein an annular sealing surface (32), which surrounds the mouth(s) of the at least one pressure duct (29), of the first component (13) and an annular sealing surface (33), which surrounds the rim of the pressure chamber (30), of the second component (2) interact areally with one another to form a sealing point, wherein the cross-sectional area of the pressure duct (29) is smaller than the cross-sectional area of the pressure chamber (30), the pressure-induced radial expansion of the annular sealing surfaces (32, 33) is substantially equal.

FUEL STOP VALVE

COMPACT FUEL SYSTEM OF HIGH ACHIEVEMENT WITH MEMORY

Brennstoffeinspritzvorrichtung für Brennkraftmaschinen.

Druckeinspritzpumpe für Verbrennungsmotoren.

Kraftstoffeinspritzpumpe für Verbrennungskraftmaschinen

Brennstoffeinspritzpumpe mit Überlaufventil für eine Kolbenbrennkraftmaschine

Steuerventil einer Brennstoffeinspritzpumpe

FUEL INJECTION PUMP FOR AN INTERNAL-COMBUSTION ENGINE.

Fuel injection pump, fuel injection device, internal-combustion engine

Device of regulation of the pressure of a fluid

LIQUID FUEL INJECTION PUMPING APPARATUS

FLOW CONTROL OR METERING VALVES

Improvements brought to the reciprocating pumps, in particular to the fuel injection pumps

Injector

HIGH PRESSURE PUMP

유량제어 밸브를 포함하는 고압펌프

... 본 발명은 유체가 유입되는 중공홀과 상기 중공홀로부터 연통된 내부 공간이 형성된 밸브 바디, 상기 중공홀로부터 상기 내부 공간으로 연통되는 유로를 개폐하는 밸브 플레이트, 상기 밸브 플레이트와 연동되는 니들, 상기 니들에 탄성력을 가하는 리턴 스프링 및 상기 밸브 바디로부터 고압펌프의 고압챔버 측으로 유체가 이동되는 측을 덮는 형태로 상기 밸브 바디 내측에 결합되는 밸브 슬리브를 포함하고, 상기 밸브 슬리브는, 상기 밸브 바디로부터 유체가 이송되는 개방된 측을 덮는 원형 플레이트, 상기 밸브 플레이트를 지지하기 위해 상기 바디부로부터 연장되어 형성되는 가압부 및 상기 고압챔버로부터 상기 밸브 바디의 내부 공간으로 역류하는 유체가 상기 밸브 플레이트에 힘을 가하는 것을 제한하며 상기 원형 플레이트로부터 연장되어 형성되는 경계부를 포함하는 것을 특징으로 하는 고압펌프로서, 본 발명에 의하면, 리턴 스프링의 힘을 크게 적용하지 않으면서도 zero flow 현상에도 self-closing을 발생시키지 않을 수 있게 한다.

SYSTEM OF FUEL INJECTION

HIGH-PRESSURE FUEL SUPPLY PUMP

When an engine requires more fuel due to high rotation during normal driving, the valve-opening pressure of a relief valve is exceeded by a momentary increase in the fuel pressure and pressure pulsation in a pipe when fuel is discharged from the fuel pump, and thus the relief valve opens involuntarily and fuel leaks from the high-pressure side of the discharge passage to the low-pressure side of the intake passage. Therefore, there is a problem in that the amount of high-pressure fuel discharged to the common rail from the high-pressure fuel supply pump is reduced. This high-pressure fuel pump, which pressurizes fuel drawn into a pressurization chamber and discharges the pressurized fuel by opening a discharge valve, is characterized by being equipped with a relief passage connecting the upstream side and the downstream side of the discharge valve, with the relief passage having a relief valve mechanism that has a check valve that stops the flow of fuel from the downstream side to the upstream ...

Two-stage hydraulic electrically-controlled unit injector

A two-stage, hydraulic, electronic unit fuel injector powered by lubricating oil from the engine crankcase includes a housing, a pilot valve disposed in the housing and connected to an electronically-controlled solenoid for movement with the armature thereof, a slidable poppet valve disposed in the housing beneath the pilot valve and controlled by the action of the pilot valve, and a fixed intensifier dump valve disposed within the poppet valve. An intensifier piston, controlled by the action of the poppet valve, is disposed within the housing below the intensifier dump valve which upon receiving high pressure fluid, in this case, lubricating oil, is forced downwardly to inject fuel received in the lower end of the injector from a common rail out of the injector tip under very high pressure. Both the pilot valve and the poppet valve are provided with valving arrangements, in the form of valve seats, internal passages, and registering annular grooves to provide and relieve the pressure acting ...

Subdivided control valve body for injector control valve

An injector for injecting fuel under high pressure into a combustion chamber of an internal combustion engine has an injector housing, a control valve body which is movably received in the injector housing, an actuating unit which activates the control valve body, a restoring element associated with an end side of the control valve body, the control valve body has parts which are held against one another, and a connecting element which holds the parts of the control valve body against one another.

FUEL SYSTEM HAVING A VALVE UPSTREAM OF A JET PUMP

A fuel system includes a fuel reservoir configured to be located within the fuel tank such that the fuel reservoir defines a fuel reservoir volume which is a subset of a fuel tank volume; a fuel pump configured to pump fuel from within the fuel reservoir volume to the fuel consuming device through a fuel supply line; a jet pump configured to 1) receive excess fuel, through a fuel return line, which had been supplied to the fuel consuming device through the fuel supply line and 2) aspirate fuel into the fuel reservoir volume from the fuel tank volume; and a valve which allows fuel flow in both directions between the fuel return line and the jet pump when a differential pressure across the valve is greater than or equal to a predetermined threshold. 1. A fuel system for supplying fuel from a fuel tank defining a fuel tank volume to a fuel consuming device , said fuel system comprising:a fuel reservoir configured to be located within said fuel tank such that said fuel reservoir defines a fuel reservoir volume which is a subset of said fuel tank volume;a fuel pump configured to pump fuel from within said fuel reservoir volume to said fuel consuming device through a fuel supply line;a jet pump configured to 1) receive excess fuel, through a fuel return line, which had been supplied to said fuel consuming device through said fuel supply line and 2) aspirate fuel into said fuel reservoir volume from said fuel tank volume; anda valve which allows fuel flow from said fuel return line to said jet pump when a differential pressure across said valve is greater than or equal to a predetermined threshold and which also allows fuel flow from said jet pump to said fuel return line when said differential pressure across said valve is greater than or equal to said predetermined threshold.2. A fuel system as in claim 1 , wherein said predetermined threshold is a 15 cm column of E85.3. A fuel system as in claim 1 , wherein said valve includes an annular wall with a central passage ...

Two-stage hydraulic electrically-controlled unit injector

A two-stage, hydraulic, electronic unit fuel injector powered by lubricating oil from the engine crankcase includes a housing, a pilot valve disposed in the housing and connected to an electronically-controlled solenoid for movement with the armature thereof, a slidable poppet valve disposed in the housing beneath the pilot valve and controlled by the action of the pilot valve, and a fixed intensifier dump valve disposed within the poppet valve. An intensifier piston, controlled by the action of the poppet valve, is disposed within the housing below the intensifier dump valve which upon receiving high pressure fluid, in this case, lubricating oil, is forced downwardly to inject fuel received in the lower end of the injector from a common rail out of the injector tip under very high pressure. Both the pilot valve and the poppet valve are provided with valving arrangements, in the form of valve seats, internal passages, and registering annular grooves to provide and relieve the pressure acting ...

Fuel system with variable discharge pump

The present invention relates generally to variable discharge pumps, and specifically pumps used in fuel injection systems. Typically, such pumps include a dedicated spill control valve for each pumping plunger, that also doubles as an avenue for refilling the pumping chambers. This double duty results in compromise in the design of the spill control valve to operate effectively in both spill and fill modes. The present invention addresses these issues by utilizing a shuttle valve member to allow the spill function and the fill function to be addressed in separate passageways while also allowing a pair of plungers to share a common spill control valve. The present invention find particular application in pumps used to supply high pressure fluid to common rails for fuel injection systems.

FUEL PUMP FOR GASOLINE DIRECT INJECTION

A fuel pump includes a fuel pump housing made of stainless steel and having a pumping chamber therewithin, a plunger bore extending thereinto, an inlet passage extending thereinto, and an outlet passage extending thereinto. A pumping plunger reciprocates within the plunger bore such that an intake stroke of the pumping plunger increases volume of the pumping chamber and a compression stroke of the pumping plunger decreases volume of the pumping chamber. An outlet valve controls fuel flow from the pumping chamber out of the fuel pump housing. The outlet valve includes an outlet valve seating surface formed by the fuel pump housing within the outlet passage such that a nitrided layer extends from the outlet valve seating surface into the fuel pump housing. The outlet valve also includes an outlet valve member within the outlet passage which is moveable between a seated position and an unseated position.

Suction valve for high-pressure fuel pump

A suction valve of a high-pressure fuel pump for a vehicle includes a housing having an inlet through which a fuel is introduced and a pump chamber configured to press the fuel, a valve installation space arranged between the inlet and the pump chamber, and a solenoid part provided with a rod for performing a linear reciprocal motion, and further includes a valve sleeve inserted into the valve installation space and formed with a flow hole, a valve spring seated on the valve sleeve, a valve plate elastically supported by the valve spring, and moving in conjunction with the rod, and a valve sheet formed with an introduction hole opened and closed by the valve plate, in which the valve sleeve is slid and inserted into the valve installation space, and the valve sheet is fitted into and fastened to the valve installation space to support the valve sleeve.

МАГНИТНЫЙ КЛАПАН

Изобретение относится к двигателестроению, в частности к системам впрыскивания топлива. Изобретение позволяет точно выдерживать необходимые короткие интервалы срабатывания магнитного клапана, снизить подвижную массу и остаточные вибрации якорной детали. Магнитный клапан для управления клапанной форсункой системы впрыскивания топлива содержит иглу клапана. Управление открытием и закрытием иглы клапана осуществляется магнитным клапаном, содержащим электромагнит, якорь и перемещаемый с помощью указанного якоря и нагруженный в направлении закрытия пружиной клапана клапанный элемент, взаимодействующий с седлом клапана. Якорь выполнен разъемным из двух деталей и состоит из якорной шайбы, которая установлена на якорном стержне с возможностью перемещения относительно него в направлении закрытия клапанного элемента под действием своей собственной инерционной массы против усилия возвратной пружины. На якорной шайбе предусмотрена часть гидравлического демпфирующего устройства, обеспечивающего гашение ...

НАСОС ВЫСОКОГО ДАВЛЕНИЯ С ДВУХПОЗИЦИОННЫМ КЛАПАНОМ ДЛЯ ПОДАЧИ ТОПЛИВА В ДВИГАТЕЛЬ ВНУТРЕННЕГО СГОРАНИЯ

Изобретение относится к двигателестроению, в частности к насосам высокого давления. Изобретение позволяет упростить конструкцию и сборку насоса высокого давления и уменьшить его стоимость. Насос высокого давления с двухпозиционным клапаном для подачи топлива в двигатель внутреннего сгорания содержит корпус, включающий в себя, по меньшей мере, камеру сжатия топлива и камеру привода, включающую в себя приводные элементы насоса, и в котором клапан содержит затвор, скользящий внутри канала в корпусе, для закрытия подающего трубопровода. Подающий трубопровод образован в корпусе между каналом и камерой сжатия. Затвор удерживается в закрытом положении посредством пружины сжатия. Пружина уперта непосредственно или косвенно в заплечик внутри канала; при этом заплечик образован за одно целое с корпусом. 14 з.п. ф-лы, 5 ил.

УСТРОЙСТВО ВПРЫСКА ТОПЛИВА ДЛЯ ДВИГАТЕЛЕЙ ВНУТРЕННЕГО СГОРАНИЯ

Изобретение относится к двигателестроению, в частности к устройствам впрыска топлива для двигателей внутреннего сгорания. Изобретение позволяет упростить конструкцию, повысить ее надежность. Устройство впрыска топлива для двигателей внутреннего сгорания содержит насос высокого давления, рабочая полость которого со стороны всасывания соединена подающим топливопроводом с топливным баком, а со стороны нагнетания соединена топливопроводом высокого давления с ресивером высокого давления, от которого к отдельным клапанным форсункам отходит множество топливопроводов. Устройство также содержит по одному нагнетательному клапану на подающем топливопроводе и топливопроводе высокого давления, предотвращающие обратный слив топлива соответственно из рабочей полости насоса в подающий топливопровод и из топливопровода высокого давления в рабочую полость насоса. Нагнетательные клапаны подающего топливопровода и топливопровода высокого давления объединены в одну общую клапанную систему. 9 з.п. ф-лы, 1 ил ...

ТОПЛИВНЫЙ КЛАПАН ДЛЯ ВПРЫСКИВАНИЯ ЖИДКОГО ТОПЛИВА С НИЗКОЙ ТЕМПЕРАТУРОЙ ВОСПЛАМЕНЕНИЯ В КАМЕРУ СГОРАНИЯ ДВУХТАКТНОГО ДВИГАТЕЛЯ ВНУТРЕННЕГО СГОРАНИЯ С ТУРБОНАДДУВОМ И САМОВОСПЛАМЕНЕНИЕМ И ДВУХТАКТНЫЙ ДВИГАТЕЛЬ ВНУТРЕННЕГО СГОРАНИЯ С ТУРБОНАДДУВОМ И САМОВОСПЛАМЕНЕНИЕМ, СОДЕРЖАЩИЙ УКАЗАННЫЙ КЛАПАН

Изобретение может быть использовано в системах топливоподачи двигателей внутреннего сгорания (ДВС). Предложен топливный клапан (50) для впрыскивания жидкого топлива с низкой температурой воспламенения в камеру сгорания двухтактного ДВС с турбонаддувом и самовоспламенением. Клапан содержит удлиненный корпус (52) с распылителем (54), входное отверстие (53) для топлива, отверстие (78) для пусковой жидкости и иглу (61) клапана, опирающуюся на седло (69) клапана в закрытом положении и поджатую к закрытому положению. Клапан содержит топливную камеру (58), окружающую иглу (61) клапана, нагнетательный поршень (80), пусковой поршень (83), причем нагнетательный поршень (80) соединен с пусковым поршнем (83) с возможностью их совместного перемещения, пусковая камера (85) соединена с отверстием (78) для пусковой жидкости, а нагнетательная камера (82) имеет выход, соединенный с топливной камерой (58), и вход, соединенный с входным отверстием (53) для топлива через обратный клапан (74), предотвращающий ...

НАГНЕТАТЕЛЬНЫЙ КЛАПАН

Сущность изобретения: запорный орган нагружен пружиной в сторону седла и имеет размещенный в проходном канале уплотненный буртик и направляющий поясок. Уплотнительная коническая поверхность контактирует с седлом в закрытом положении клапана. Пружина установлена в полости, противоположной рабочей камере топливного насоса высокого давления. На буртике выполнена выемка, образующая со стенкой проходного канала проходное сечение. Буртик выполнен в виде всасывающего и регулирующего участков. Выемка расположена на регулирующем участке. В месте пересечения седловой поверхности и поверхности канала выполнена выпускная кромка, образующая с выемкой соединительное сечение, площадь которого меньше или равна площади проходного сечения. 6 з. п. ф-лы, 8 ил.

УЗЕЛ ДЛЯ ПОДАЧИ СРЕДЫ ПОД ВЫСОКИМ ДАВЛЕНИЕМ

ТОПЛИВНЫЙ КЛАПАН ДЛЯ ВПРЫСКИВАНИЯ ЖИДКОГО ТОПЛИВА С НИЗКОЙ ТЕМПЕРАТУРОЙ ВОСПЛАМЕНЕНИЯ В КАМЕРУ СГОРАНИЯ ДВУХТАКТНОГО ДВИГАТЕЛЯ ВНУТРЕННЕГО СГОРАНИЯ С ТУРБОНАДДУВОМ И САМОВОСПЛАМЕНЕНИЕМ И ДВУХТАКТНЫЙ ДВИГАТЕЛЬ ВНУТРЕННЕГО СГОРАНИЯ С ТУРБОНАДДУВОМ И САМОВОСПЛАМЕНЕНИЕМ, СОДЕРЖАЩИЙ УКАЗАННЫЙ КЛАПАН

Pump device for common rail injection system for internal combustion engine of vehicle, has vent valve which is constructed such that it is opened, when pressure in high pressure region is less than predefined pressure

The pump device (41) has a high pressure pump (40) which is provided in order to deliver fuel from low pressure region (34) into a high pressure region (32) of the common rail injection system (30). A vent valve (10) is connected to high pressure region of the rail injection system. The vent valve is constructed such that it is opened, when pressure in high pressure region is less than a predefined pressure.

UEberstroemventil fuer Brennstoffpumpen fuer luftlose Einspritzung

Kraftstoffabsperrventil

Pumpe, insbesondere Kraftstoffhochdruckpumpe einer Brennkraftmaschine

Pumpe, insbesondere Kraftstoffhochdruckpumpe einer Brennkraftmaschine, aufweisend ein Gehäuse mit einem Pumpenzylinderkopf 1 und einem Pumpenzylinder 2, wobei der einen Pumpenplunger 3 aufnehmende Pumpenzylinder 2 von dem Pumpenzylinderkopf 1 abgedeckt ist, und wobei der Pumpenplunger 3 zusammen mit dem Pumpenzylinderkopf 1 einen Pumpenarbeitsraum 4 begrenzt, der mit einem Hochdruckanschluss 8 und mit einem Niederdruckanschluss 6 verbunden ist. Erfindungsgemäß wird eine Pumpe bereitgestellt, bei dem der Niederdruckanschluss 6 in einer beliebigen Position zu einer Längsachse durch die Pumpe ausgerichtet werden kann. Erreicht wird dies dadurch, dass das Gehäuse einen zylinderförmigen Außenringabschnitt 14 aufweist, der mit einem aufgesetzten Ringflansch 16 zusammenwirkt, und dass in den Außenringabschnitt 14 eine mit dem Pumpenarbeitsraum 4 zusammenwirkende und in dem Ringflansch zu dem Niederdruckanschluss weitergeführte Strömungsverbindung eingelassen ist.

Valve for fuel injection system of internal combustion engine

The valve (1) comprises a valve needle (2) and a coaxial actuating piston (3) which is arranged in a stepped hole (7) of a housing (6) and has a necking (5). The valve has a feedline (10), a control chamber (20), as well as a solenoid valve (21) through which the control chamber is connected with a relief line (22). A throttled connecting line (19) is provided as a bypass between the feedline and the relief line. The connecting line has a leakage valve which communicates with the solenoid valve so that during injection, the connecting line can be cuttof. The leakage valve is arranged with a high-pressure valve provided with valve seats (8,28) on either pressure sides. The leakage and high-pressure valve may be formed as a double-acting ball valve (4).

Kraftstoff-Hochdruckpumpe, mit einem zwischen einem Förderraum und einem Auslass angeordneten und zum Auslass hin öffnenden Auslassventil

Die Erfindung betrifft eine Kraftstoff-Hochdruckpumpe (28), mit einem zwischen einem Förderraum (26) und einem Auslass (36) angeordneten und zum Auslass (36) hin öffnenden Auslassventil (40), und mit einem zwischen dem Auslass (36) und dem Förderraum (26) angeordneten und zum Förderraum (26) hin öffnenden Druckbegrenzungsventil (42). Erfindungsgemäß weisen das Auslassventil (40) und das Druckbegrenzungsventil (42) einen gemeinsamen Ventilsitzkörper (54) auf, in dem mindestens ein erster und mindestens ein zweiter Hydraulikkanal (90, 94) vorhanden sind, wobei der erste Hydraulikkanal (90) den Förderraum (26) mit einem stromaufwärtigen Bereich des Auslassventils (40) und der zweite Hydraulikkanal (94) den Auslass (36) mit einem stromaufwärtigen Bereich des Druckbegrenzungsventils (42) verbindet.

KRAFTSTOFFEINSPRITZPUMPE FÜR BRENNKRAFTMASCHINEN, INSBESONDERE DIESELMOTOREN

Zumesseinheit für eine Kraftstoffhochdruckpumpe

Die Erfindung betrifft eine Zumesseinheit für eine Kraftstoffhochdruckpumpe in einem Kraftstoffeinspritzsystem, insbesondere in einem Common-Rail-Einspritzsystem, umfassend ein Ventilgehäuse (1) mit einer Axialbohrung (2), in der ein Stellglied (3) axial verschiebbar aufgenommen ist, wobei in die Axialbohrung (2) mindestens eine als Einlass dienende Radialbohrung (4) mündet. Erfindungsgemäß ist in der Radialbohrung (4) ein in Richtung eines Ventilsitzes (5) von der Federkraft einer Feder (6) beaufschlagtes Schließelement (7) aufgenommen, das über eine axiale Verschiebung des in der Axialbohrung (2) aufgenommenen Stellglieds (3) entgegen der Federkraft der Feder (6) aus dem Ventilsitz (5) hebbar ist.

Ventilanordnung mit gekoppelten Ventilsitzen und ihre Verwendung in einem Kraftstoffeinspritzventil

DRUCKVENTIL

Einspritzsystem und Verfahren zum Betreiben eines Einspritzsystems

The invention relates to an injection system, comprising a piezoelectric actuator (10), a hydraulic transmission element (12) and a control valve (14). When the injection system is operating continuously, the stroke of the piezoelectric actuator (10) can be transmitted to the control valve (14) by means of a hydraulic medium in the hydraulic transmission element (12). The piezoelectric actuator (10) and the components of the hydraulic transmission element (12) are arranged in such a way in relation to the control valve (14) that at least part of the stroke of said piezoelectric actuator (10) can be transmitted directly to the control valve (14). According to the inventive method for operating a piezo injector, the piezoelectric actuator (10) is excited electrically and caused to perform a stroke, the stroke is transmitted directly to a control valve (14) in a first phase, the hub is transmitted hydraulically to a control valve (14) in a second phase, and the control valve (14) is opened ...

Apparat zum Antreiben eines piezoelektrischen Elements zum Öffnen oder zum Schliessen eines Ventilteils.

High pressure fuel pump with a delivery valve having a porous member

The invention relates to a high pressure fuel pump such as a fuel pump, comprising an evacuation device, the device comprising a porous member adapted to be disposed within said orifice and provide a predetermined flow-rate of fluid there through, wherein the device further provides at least one opening that is selectively actuated to provide an increased flow-rate of fluid through the device. The invention also relates to an evacuation orifice assembly for a high pressure fuel pump and an evacuation orifice arrangement adapted to be fitted within an existing bore in a high pressure fuel pump.

Fuel pump

A self-regulated fuel pump assembly 10 between a low pressure tank (12, Fig. 1) and a high pressure reservoir 38 such as a common rail, comprising a piston 26, compression chamber 28, inlet valve (32, Fig. 8), outlet valve (36, Fig. 8), and characterised by a mechanical regulating valve 42 arranged in the pump body 14 and modulating the pressure in a high pressure space 38 so that pressure matches the engine demand, the modulation requiring adjustment of the inlet fuel quantity, adjustment of the volume of the high pressure space 38, and control of a return fluid communication enabling fuel to exit the high pressure reservoir 38. This mechanically self-regulating system aims to eliminate the cost involved with electrical actuators, and the noise produced by them.

Accumulating chamber-influenced injector having a cascading control arrangement

Fuel Injector

Fuel injector control system and method

A fuel injector (32) for an internal combustion engine (10) is disclosed. The fuel injector has a plunger (72), an electronically controlled check valve (80), and a controller (53) in communication with the electronically controlled check valve. The controller is configured to receive a indication of a desired start of injection timing relative to an angular position of a crankshaft (24) of the engine, and a desired injection quantity. The controller is also configured to determine a displacement of the plunger based on an angular position of the crankshaft; to determine a start of current for the electronically controlled check valve relative to plunger displacement that results in the desired start of injection timing, and to determine an end of current for the electronically controlled check valve relative to plunger displacement that results in the desired injection quantity. The controller is further configured to affect the determined start and end of current for the electronically ...

Distributor for a high pressure fuel system

Variable discharge fuel pump

Fuel pump

VARIABLE DISCHARGE FUEL PUMP

A pump (16) has a housing (34) defining a first pumping chamber (42) and a second pumping chamber (46). The pump (16) also has a first plunger (40) and a second plunger (44). The pump (16) additionally has at least one driver (48, 50) operatively engaged with at least one of the first and second plungers (40, 44) to move the at least one of the first and second plungers (40, 44) between first and second end positions. The pump (16) further has a common spill passageway (73) fluidly connectable to the first and second pumping chambers (42, 46) and a selector valve (76) disposed between the common spill passageway (73) and the first and second pumping chambers (42, 46). The selector valve (76) has a body (75) and a ball valve member (77) operably disposed within the body (75). The ball valve member (77) is movable between a first and a second ball valve member position to selectively fluidly connect the first and second pumping chambers (42, 46) to the common spill passageway (73).

Fuel pump

A liquid fuel distributor

The distributor is for use in a fuel injection system and comprises a rotor (56), a fuel inlet (50) for feeding fuel under pressure from a servo pump (10, 12, 14) to the rotor and a plurality of fuel outlets (61) for supplying fuel under pressure to a plurality of fuel injectors in turn, the injectors comprising fuel actuated pumping pistons. Each outlet has an outlet valve (53) operable by fuel pressure at the rotor and each outlet valve has a pressure operated return valve (67) to allow return fuel flow when fuel injection terminates if pressure in the outlet exceeds pressure in the inlet e.g. due to dynamic effects. The rotor has metering means in the form of a plurality of metering ports (79) which align with the fuel outlets (61) when, during return strokes of the pumping pistons fuel from the injectors. The rate of flow through the metering ports (79) determines the return stroke of each injection piston and thus the quantity delivered during that piston's next delivery stroke. Means ...

Fuel injection pump

Fuel pump

A fuel pump 1 comprises a main body 2 having a receptacle 9 extending into the main body along an outlet axis A, where an outlet module body 21 of an outlet module 20 is received in the receptacle and connected to the main body in a fuel-tight manner. The main body has a pumping chamber 3 with a pumping plunger 4, and an inlet passage 5 connecting a low-pressure inlet to the pumping chamber. An inlet valve 6 selectively enables flow through the inlet passage. The outlet module includes an outlet passage 27, an outlet valve 50, a relief passage 31 and a relief valve 40. The outlet passage connects the pumping chamber to a high-pressure outlet 28. The outlet valve selectively enables flow through the outlet passage. The relief passage connects the outlet passage, downstream of the outlet valve, to the pumping chamber. The relief valve selectively enables flow through the relief passage.

Ein Hochdruckmedium führendes Bauelement

In the case of a component which conducts high-pressure medium, comprising a first component (13) with at least one pressure duct (29) and a second component (2) with a pressure chamber (30), wherein an annular sealing surface (32), which surrounds the mouth(s) of the at least one pressure duct (29), of the first component (13) and an annular sealing surface (33), which surrounds the rim of the pressure chamber (30), of the second component (2) interact areally with one another to form a sealing point, wherein the cross-sectional area of the pressure duct (29) is smaller than the cross-sectional area of the pressure chamber (30), the pressure-induced radial expansion of the annular sealing surfaces (32, 33) is substantially equal.

FUEL INJECTION SYSTEM FOR INTERNAL-COMBUSTION ENGINES

FUEL INJECTION MECHANISM WITH A HIGH PRESSURE FUEL PUMP WITH VARIABLE FLOW RATE

FUEL INJECTION PUMP AND REPLACEABLE CHECK VALVE THEREFOR

A controlled nozzle injection method and apparatus

FLOW CONTROL VALVE FOR FUEL INJECTION NOZZLE

FUEL INJECTOR SYSTEM FOR AN INTERNAL COMBUSTION ENGINE

FLOW CONTROL VALVE FOR FUEL INJECTION NOZZLE

FUEL INJECTOR SYSTEM FOR AN INTERNAL COMBUSTION ENGINE

Improvements with the feeding systems of fuel for internal combustion engines

Fuel supply system

Système d'alimentation en carburant, à rampe commune, d'un moteur à combustion interne, comprenant un dispositif (3) de pompage, un système (7) d'accumulation de pression doté d'une pluralité d'unités distributrices (9) dotées chacune d'au moins trois raccordements (13, 14, 15) reliés de manière qu'un raccordement (13) d'amenée de carburant d'une première unité distributrice (9) soit relié au dispositif (3) de pompage via une canalisation (10) à haute pression, qu'un raccordement (14) de vidange de carburant de la première jusqu'à l'avant-dernière unité distributrice (9) soit relié au raccordement (13) d'amenée de carburant de l'unité distributrice (9) située directement en aval via une canalisation (10) à haute pression, tandis que le raccordement (14) de vidange de carburant de la dernière unité distributrice (9) est fermé, et qu'un raccordement (15) d'injecteur de chaque unité distributrice (9) soit relié à au moins un injecteur via une canalisation (11) à haute pression, chaque unité ...

CLIPS ARRANGEMENT OF A VALVE ON A PUMP

Injection system for an internal combustion engine

The present invention relates to an internal combustion engine having an injector which functions as a a positive displacement pump and dispenses an amount of lubricant fixed for each and every operation of the injector. The fluid dispensed could be a lubricant delivered directly to crankshaft bearings, camshaft bearings, tappets or cylinder sleeve. Alternatively the fluid could be fuel, water or urea delivered to an exhaust system upstream of a catalytic converter. The injector can have a one-way valve with a valve element having a domed or conical surface for directing fluid flow across a sharp edge which induces turbulence in the fluid flow.

Electrically activated carburettor

In order to create an electrically activated carburettor for petrol engines with an air funnel for sucking in fuel from a fuel line leading into the air funnel which is connected to a fuel chamber and between fuel chamber and orifice in the air funnel a fuel jet for adjusting a fuel quantity that can be sucked in from the fuel chamber because of vacuum in the air funnel that can be flexibly adapted as carburettor more preferably for power implements, which overcomes the abovementioned disadvantages of the prior art and has a simple, sturdy construction which allows constant long-term behaviour, it is proposed that in series connection with the fuel jet at least two Tesla diodes are provided, between which a pumping chamber with a pumping unit is located.

High pressure fuel pump

A discharge valve body and a relief valve body are coaxially arranged in-series in a discharge-relief valve unit, which is accommodated in a fuel discharge passage. When a first forward force acting on the discharge valve body in its valve opening direction becomes larger than a second rearward force acting on the same valve body in a valve closing direction, the discharge valve body is moved in its valve closing direction, so that fuel is pumped out from a fuel pressurizing chamber to a discharge port. When a second forward force acting on the relief valve body in a valve opening direction becomes larger than a first rearward force acting on the same valve body in its valve closing direction, the relief valve body is moved in its valve opening direction, so that a fuel relief is allowed from a discharge-port side to a pressurizing-chamber side.

Electromagnetic flow rate control valve and high-pressure fuel supply pump using the same

High-response and high-power electromagnetically driven flow rate control valve with flange portion forming an attracting surface on an anchor, a first peripheral surface portion having a diameter smaller than the flange portion, and a cylindrical non-magnetic area opposing an outer peripheral surface of the flange portion with a third clearance interposed therebetween are provided, and a first fluid trap portion communicating with the back pressure chamber via the third clearance is provided. When the diameter of the flange portion is enlarged in order to enlarge the cross-sectional area of the attracting surface, fuel that is displaced by the anchor is increased, but is partly absorbed in the first fluid trap portion, so that the fuel passing through the fuel channel does not increase in comparison with fuel before the diameter of the flange portion is enlarged. Accordingly, the cross-sectional area of the attracting surface may be enlarged.

VENTED PRESSURE RELIEF VALVE FOR AN INTERNAL COMBUSTION ENGINE FUEL SYSTEM

A fuel pressure relief valve is positioned along a fuel circuit of an internal combustion engine. The pressure relief valve includes a valve body, a first plunger positioned within the valve body, a second plunger positioned within the first plunger, and a valve plug securing the first and second plungers in the valve body. A spring is positioned between the valve plug and the second plunger. Fuel leakage into the pressure relief valve causes the pressure relief valve to lift undesirably in the absence of excessive fuel pressure. The undesirable lifting undesirably affects the operation of the fuel rail and causes wear and shortened life of the pressure relief valve. The first plunger has at least one relief passage or groove located on an exterior surface, relieving the undesirable pressure buildup from a chamber formed between the valve body and the first plunger, eliminating undesirable liftoff events. 1. An internal combustion engine , comprising:a fuel circuit;a fuel tank positioned along the fuel circuit;a fuel pump positioned along the fuel circuit downstream of the fuel tank;a fuel pressure relief valve in fluid communication with the fuel pump and the fuel tank, the fuel pressure relief valve including a valve body, a valve body passage formed in the valve body, a valve body cavity, a first plunger seat positioned in the valve body cavity adjacent the valve body passage, a first plunger reciprocally mounted in the valve body cavity to form a sliding fluid seal interface with the valve body, a fuel chamber positioned in the valve body cavity between the first plunger and the valve body, a primary relief circuit positioned to permit fuel flow from the fuel chamber, and an auxiliary relief circuit positioned fluidly in parallel to the primary relief circuit to permit fuel to flow from the fuel chamber toward the fuel tank when the pressure in the fuel chamber is below a predetermined pressure level, the auxiliary relief circuit including a relief passage ...

VALVE DEVICE FOR CONTROLLING OR METERING A FLUID

A valve device for controlling or metering a fluid includes a housing, a flow duct formed in the housing, and a valve body arranged in the flow duct. The valve body has a sealing section which, when the valve device is closed, rests on a sealing seat on the housing. The sealing section and sealing seat together form a sealing region. When the valve device is closed, a decay chamber is defined immediately upstream of the sealing region in the flow duct. The decay chamber is bounded by a baffle wall that is tilted with respect to the normal to the sealing region at an angle of at most 15° in the flow direction to 60° counter to the flow direction. 1. A valve device for controlling or metering a fluid , comprising:a housing;a flow channel, formed in the housing; anda valve body arranged in the flow channel, the valve body having a sealing section which, when the valve device is closed, bears against a housing-side sealing seat, the sealing section and sealing seat together forming a sealing region,wherein, when the valve device is closed, there is a decaying space defined in the flow channel immediately upstream of the sealing region, the decaying space is being delimited by a deflector wall that is tilted at least in regions with respect to the normal to the sealing region at an angle of from at most 15° in the flow direction to at most 60° counter to the flow direction.2. The valve device as claimed in claim 1 , wherein the deflector wall is tilted at least in regions with respect to the normal to the sealing region at an angle of from at most 5° in the flow direction to at least 20° counter to the flow direction.3. The valve device as claimed in claim 1 , wherein the deflector wall is formed on one or more of the housing and the valve body.4. The valve device as claimed in claim 1 , wherein a bounding wall of the flow channel has a rounded portion or a bevel upstream of and close to the deflector wall.5. The valve device as claimed in claim 4 , wherein a bounding ...

HIGH PRESSURE COMMON RAIL FUEL PUMP OUTLET CHECK VALVE SPRING RETAINER METHOD

The present disclosure generally relates to a pumping element of a fuel pump for an internal combustion engine wherein the pumping element comprises a first flow chamber; a second flow chamber in fluid connection with the first flow chamber, the second flow chamber including a shoulder; a check valve including a first insert and a second insert, the first insert being movable between a first position wherein the first insert forms a seal that inhibits fluid flow between the first and second flow chambers and a second position wherein the first insert permits fluid flow between the first and second flow chambers, the second insert being inserted into the second flow chamber to an extent limited by the shoulder; and a spring having a first end engaging the first insert and a second end engaging the second insert; wherein the first insert moves from the first position to the second position against a biasing force of the spring in response to pressurized fluid in the first flow chamber. 19.-. (canceled)10. A pumping element comprising:a first flow chamber;a second flow chamber in fluid connection with the first flow chamber, the second flow chamber including a first section having a first diameter and a second section having a second diameter, the first diameter being smaller than the second diameter;a first insert being moveable between a first position wherein the first insert forms a seal that inhibits fluid flow between the first and second flow chambers and a second position wherein the first insert permits fluid flow between the first and second flow chambers;a second insert disposed within the second section; anda third insert disposed within the second section, wherein the third insert includes a shell and an insert inserted into the shell to cause expansion of the shell to retain the third insert in a fixed position within the second flow chamber;wherein the second insert is intermediate the first insert and the third insert, and the first insert moves from ...

FUEL SUPPLY SYSTEM FOR AN ENGINE WITH AN ELECTRIC IGNITION POWER SOURCE

A fuel supply system for a reciprocating-piston engine includes a storage tank; a wall of the storage tank defining a first aperture and a second aperture therethrough; a first fuel injector fluidly coupled with the first aperture of the storage tank via a pressure control module and a first fuel injector supply conduit; a pump fluidly coupled with the second aperture of the storage tank; and a second fuel injector fluidly coupled with an outlet port of the pump via a second fuel injector supply conduit. The pressure control module is configured to maintain a pressure in the first fuel injector supply conduit within a pressure range that includes a pressure value that is less than a pressure inside the storage tank. The pump is configured to maintain a pressure inside the second fuel injector supply conduit that is greater than the pressure inside the first fuel injector supply conduit. 1. A fuel supply system for a reciprocating-piston engine , the fuel supply system comprising:a storage tank, a wall of the storage tank defining a first aperture and a second aperture therethrough, the first aperture being distinct from the second aperture;a first fuel injector fluidly coupled with the first aperture of the storage tank via a pressure control module and a first fuel injector supply conduit, the first fuel injector supply conduit being disposed fluidly in series between the pressure control module and first fuel injector,the pressure control module being configured to maintain a pressure in the first fuel injector supply conduit within a pressure range that includes a pressure value that is less than a pressure inside the storage tank;a pump fluidly coupled with the second aperture of the storage tank; anda second fuel injector fluidly coupled with an outlet port of the pump via a second fuel injector supply conduit, the pump being configured to maintain a pressure inside the second fuel injector supply conduit that is greater than the pressure inside the first fuel ...

LARGE TWO-STROKE COMPRESSION-IGNITED INTERNAL COMBUSTION ENGINE WITH FUEL INJECTION SYSTEM FOR LOW FLASHPOINT FUEL AND A FUEL VALVE THEREFORE

A large two-stroke turbocharged compression-ignited internal combustion crosshead engine with a plurality of cylinders has at least one pressure booster for each cylinder for boosting fuel pressure, two or more electronically controlled fuel valves for each cylinder with an inlet of the two or more electronically controlled fuel valves being connected to an outlet of the at least one pressure booster. An electronic control unit is connected to the at least one pressure booster and the two or more electronically controlled fuel valves. The electronic control unit is configured to determine a start time for a fuel injection event, activate the at least one pressure booster ahead of the determined start time and pen the two or more electronically controlled fuel valves at the determined start time. 18-. (canceled)9. A fuel valve for injecting low flashpoint liquid fuel into the combustion chamber of a large slow running two-stroke turbocharged self-igniting internal combustion engine , said fuel valve comprising:an elongated valve housing with a rear end and a front end,a nozzle with a plurality of nozzle holes, said nozzle being disposed at the front end of said elongated valve housing,a fuel inlet port in said elongated valve housing for connection to a source of pressurized low flashpoint fuel,an actuation fluid port in said elongated valve housing for connection to a source of actuation fluid,an axially displaceable valve needle slidably received in a longitudinal bore in said fuel valve, said valve needle having a closed position and an open position and said valve needle being biased towards said closed position,said valve needle allowing flow of fuel from a fuel cavity to said plurality of nozzle holes when the valve needle is in its open position and said valve needle preventing flow of fuel from said fuel cavity to said plurality of nozzle holes when the valve needle is in its closed position,said valve needle being operably connected to a needle actuation ...

Fuel Injection System

The present disclosure relates to a fuel injection system. Some examples may include: a low-pressure system providing the fuel; a fuel pump; a feed region for the fuel; a pressure chamber; a low-pressure region for supplying the pressure chamber with fuel; a high-pressure region into which the fuel is delivered from the pressure chamber; an inlet valve in the pressure chamber for letting fuel from the low-pressure region into the pressure chamber; and a nonreturn valve arranged upstream of the inlet valve in the direction of flow of the fuel preventing a fuel volume not delivered into the high-pressure region from flowing back out of the pressure chamber into the low-pressure system. 1. A fuel injection system for injecting a fuel into a combustion chamber of an internal combustion engine , the system comprising:a low-pressure system providing the fuel;a high-pressure fuel pump for applying pressure to the fuel provided by the low-pressure system;a feed region for feeding the fuel from the low-pressure system to the high-pressure fuel pump;a pressure chamber in which the high pressure is applied to the fuel;a low-pressure region fluidically connected to the feed region for supplying the pressure chamber with fuel;a high-pressure region into which the fuel is delivered from the pressure chamber;an inlet valve in the pressure chamber for letting fuel from the low-pressure region into the pressure chamber; anda nonreturn valve arranged upstream of the inlet valve in the direction of flow of the fuel preventing a fuel volume not delivered into the high-pressure region from flowing back out of the pressure chamber into the low-pressure system.2. The fuel injection system as claimed in claim 1 , wherein:the feed region comprises a feed line to feed the fuel from the low-pressure system to the high-pressure fuel pump, the feed line connecting the low-pressure system to a housing of the high-pressure fuel pump; andthe nonreturn valve is arranged in the feed line.3. The fuel ...

Mecha-Hydraulic Actuated Inlet Control Valve

The subject matter of this specification can be embodied in, among other things, a fluid control device that includes a housing defining a plunger cavity in fluid communication with a fluid inlet and a fluid outlet, a valve having a shaft having a first end and a second end, and a stopper at the first end configured to block a fluid circuit between the fluid inlet and the fluid outlet in a first configuration of the inlet control valve and connect the fluid circuit in a second configuration of the inlet control valve, and a plunger configured for axial movement within the plunger cavity, defining a shaft cavity having an inner wall extending from an enclosed end to an open end in fluid communication with the fluid outlet, and configured to accommodate axial movement of the shaft within the shaft cavity. 1. A fluid control device comprising:a housing defining a plunger cavity in fluid communication with a fluid inlet and a fluid outlet; a shaft having a first end and a second end; and', 'a stopper at the first end, configured to block a fluid circuit between the fluid inlet and the fluid outlet in a first configuration of the inlet control valve and connect the fluid circuit in a second configuration of the inlet control valve; and, 'a valve comprisinga plunger configured for axial movement within the plunger cavity, defining a shaft cavity having an inner wall extending from an enclosed end to an open end in fluid communication with the fluid outlet, and configured to accommodate axial movement of the shaft within the shaft cavity.2. The fluid control device of claim 1 , wherein the shaft and the inner wall define a fluid passage from the open end to the enclosed end.3. The fluid control device of claim 2 , wherein the shaft cavity and the shaft are configured such that the fluid passage has a predetermined cross-section.4. The fluid control device of claim 1 , further comprising a biasing member configured to urge the valve toward the first configuration.5. The ...

HIGH PRESSURE FUEL PUMP WITH MECHANICAL PRESSURE REGULATION

A high pressure fuel pump includes an inlet metering valve arranged to control a quantity of fuel delivered to the pumping chamber during retracting motion of the pumping plunger. The inlet metering valve includes a metering valve member movable between a closed position and an open position, movement of the metering valve member from the closed position to the open position defining a variable flow area that increases as the metering valve member moves from the closed position toward the open position. An actuator piston in an actuator bore is exposed to pressure in the common rail. The actuator piston is biased toward a first position corresponding to low pressure in the common rail and movable toward a second position corresponding to maximum pressure in the common rail. The actuator piston includes a valve stop that determines a metering position of the metering valve member. 1. A high pressure fuel pump in which a pumping plunger is driven by a cam follower in contact with a profile of a rotating cam , the pumping plunger reciprocating axially in a pumping chamber between a retracting motion during which fuel is delivered to the pumping chamber and a pumping motion during which the plunger pressurizes fuel in the pumping chamber , said pressurized fuel flowing through a pump outlet passage to a pressurized common rail , said fuel pump comprising: a metering valve member movable between a closed position preventing fuel flow into the pumping chamber and an open position allowing fuel to fill the pumping chamber, movement of said metering valve member from said closed position to said open position defining a variable flow area that increases as said metering valve member moves from said closed position toward said open position;', 'an actuator piston in an actuator bore exposed to pressure in said common rail, said actuator piston biased toward a first position corresponding to low pressure in said common rail and movable toward a second position corresponding ...

Direct-injection, supercharged internal combustion engine with high-pressure fuel pump, and method for operating an internal combustion engine of said type

A direct-injection, supercharged internal combustion engine having at least one cylinder, in which each cylinder is equipped with a direct injection apparatus, a fuel supply system comprising a high-pressure side and a low-pressure side, and a high-pressure piston pump comprising a piston displaceable in translational fashion between a bottom dead center and a top dead center of a pressure chamber of variable volume. The displaceable piston jointly delimits the pressure chamber with variable volume in such a way that a displacement of the piston causes a change in the volume of the pressure chamber via actuation of least one movable actuation element.

HIGH-PRESSURE PUMP AND METHOD FOR MANUFACTURING SAME

A plunger of a high-pressure pump is provided reciprocatably on an inner side of a cylinder. A holder disposed on an opposite side of the cylinder from a pressurizing chamber includes a large tubular portion that provides a predetermined space between the large tubular portion and an outer wall of the plunger, and a small tubular portion that is disposed on an opposite side of the large tubular portion from the cylinder. A pin inserted into a hole of the plunger at a position corresponding to the large tubular portion protrudes radially outward from the outer wall of the plunger and is accommodated in a space on an inner side of the large tubular portion. 1. A high-pressure pump comprising:a cylinder;a pump body that includes a pressurizing chamber provided in an end portion of the cylinder;a plunger that is disposed reciprocatably on an inner side of the cylinder and is capable of changing a volume of the pressurizing chamber;a cylindrical member that is disposed coaxially with the cylinder on an opposite side of the cylinder from the pressurizing chamber, and the cylindrical member including a large tubular portion which defines a predetermined space between the large tubular portion and an outer wall of the plunger, and a small tubular portion having an inner diameter smaller than an inner diameter of the large tubular portion and being located on an opposite side of the large tubular portion from the cylinder; anda locking member protruding radially outward from the outer wall of the plunger at a position corresponding to the large tubular portion of the cylindrical member, the locking member being accommodated in the space on an inner side of the large tubular portion.2. The high-pressure pump according to claim 1 , whereinthe cylinder and the pump body are integrated together, andthe pump body closes an opposite side of the pressurizing chamber from the plunger.3. The high-pressure pump according to claim 1 , whereinthe locking member is capable of being ...

LARGE TWO-STROKE COMPRESSION-IGNITED INTERNAL COMBUSTION ENGINE WITH FUEL INJECTION SYSTEM FOR LOW FLASHPOINT FUEL AND A FUEL VALVE THEREFORE

A large two-stroke turbocharged compression-ignited internal combustion crosshead engine with a plurality of cylinders has at least one pressure booster for each cylinder for boosting fuel pressure, two or more electronically controlled fuel valves for each cylinder with an inlet of the two or more electronically controlled fuel valves being connected to an outlet of the at least one pressure booster. An electronic control unit is connected to the at least one pressure booster and the two or more electronically controlled fuel valves. The electronic control unit is configured to determine a start time for a fuel injection event, activate the at least one pressure booster ahead of the determined start time and pen the two or more electronically controlled fuel valves at the determined start time. 115-. (canceled)16. A fuel valve for injecting low flashpoint liquid fuel into the combustion chamber of a large slow running two-stroke turbocharged self-igniting internal combustion engine , said fuel valve comprising:an elongated valve housing with a rear end and a front end,a nozzle with a plurality of nozzle holes, said nozzle being disposed at the front end of said elongated valve housing,a fuel inlet port in said elongated valve housing for connection to a source of pressurized low flashpoint fuel, an actuation fluid port in said elongated valve housing for connection to a source of actuation fluid,an axially displaceable valve needle slidably received in a longitudinal bore in said fuel valve, said valve needle having a closed position and an open position and said valve needle being biased towards said closed position,said valve needle allowing flow of fuel from a fuel cavity to said plurality of nozzle holes when the valve needle is in its open position and said valve needle preventing flow of fuel from said fuel cavity to said plurality of nozzle holes when the valve needle is in its closed position,a pump piston received in a first bore in said valve housing with ...

Fuel Pump Solenoid Assembly Method

A solenoid assembly of a fuel pump is disclosed, including a housing having an open end and a partly closed end; a pole piece fixedly disposed within the housing; a bobbin assembly disposed within the housing and including a coil disposed proximal to the pole piece; and a bobbin retainer disposed between the open end of the housing and the bobbin assembly, a radially outer surface of the bobbin retainer contacting the housing. A portion of the housing which is adjacent the bobbin retainer has an outer surface that is recessed and an inner surface that protrudes against the bobbin retainer. The portion is created by deforming the housing to create the protrusion on the inner surface of the housing. The housing inner surface protrusion provides a press fit engagement with the bobbin retainer. 1. A solenoid assembly of a fuel pump , comprising:a housing having an open end and a partly closed end;a pole piece fixedly disposed within the housing;a bobbin assembly disposed within the housing and including a coil disposed proximal to the pole piece; anda bobbin retainer disposed between the open end of the housing and the bobbin assembly, a radially outer surface of the bobbin retainer contacting the housing,wherein a portion of the housing which is adjacent the bobbin retainer has an outer surface that is recessed and an inner surface that protrudes against the bobbin retainer.2. The solenoid assembly of claim 1 , wherein the housing claim 1 , including the portion thereof claim 1 , is integrally formed as a unitary member.3. The solenoid assembly of claim 1 , wherein the bobbin assembly includes a bobbin around which the coil is wound claim 1 , the bobbin includes a ledge claim 1 , and the pole piece includes a ledge on which the ledge of the bobbin rests.4. The solenoid assembly of claim 1 , wherein the bobbin retainer has a press fit engagement with the portion of the housing and a slip fit relationship with the housing not containing the protruding inner surface claim ...

FUEL PUMP AND INLET VALVE ASSEMBLY THEREOF

A fuel pump includes a fuel pump housing with a pumping chamber; a pumping plunger which reciprocates within a plunger bore; and an inlet valve. The inlet valve includes a valve body having a valve body bore; an inlet passage; and an outlet passage. The inlet valve also includes a check valve which moves between a seated position and an unseated position, wherein the seated position prevents flow through the outlet passage into the valve body bore and the unseated position permits flow through the outlet passage such that the valve body bore is in fluid communication with the pumping chamber. The inlet valve also includes a valve spool which moves between a first position where the valve spool maintains the check valve member in the unseated position and a second position where the check valve member is able to move to the seated position. 1. A fuel pump comprising:a fuel pump housing with a pumping chamber defined therein;a pumping plunger which reciprocates within a plunger bore along a plunger bore axis such that an intake stroke of said pumping plunger increases volume of said pumping chamber and a compression stroke of said pumping plunger decreases volume of said pumping chamber; and a valve body having 1) a valve body bore which is centered about, and extends along, a valve body bore axis, 2) a valve body inlet passage which opens into said valve body bore, and 3) a valve body outlet passage which opens into said valve body bore;', 'a check valve with a check valve member which moves between a seated position and an unseated position, wherein said seated position prevents flow through said valve body outlet passage in a direction into said valve body bore and said unseated position permits flow through said valve body outlet passage such that said valve body bore is in fluid communication with said pumping chamber; and', 'a valve spool within said valve body bore, said valve spool being moveable along said valve body bore axis between 1) a first position in ...

Fuel Injection System For An Internal Combustion Engine

The present disclosure relates to internal combustion engines. Various embodiments may include a fuel injection system for an internal combustion engine comprising: a high-pressure fuel pump with a pressure chamber and a pump piston; a high-pressure region downstream of the pump piston; and a valve arrangement connecting the pressure chamber to the high-pressure region. The valve arrangement includes an outlet valve and a pressure-limiting valve. The outlet valve and the pressure-limiting valve are mounted in two separate receptacle bores in a common valve housing. The receptacle bores extend along a longitudinal axis of the valve housing. The valve housing defines a central flow bore. The receptacle bores are each fluidly connected to the central flow bore by a bore intersection. 1. A fuel injection system for an internal combustion engine , the system comprising:a high-pressure fuel pump with a pressure chamber housing a pump piston moving to pressurize a fuel;a high-pressure region downstream of the high-pressure fuel pump into which the pump piston feeds the pressurized fuel; anda valve arrangement connecting the pressure chamber to the high-pressure region;wherein the valve arrangement includes an outlet valve with an outlet valve closing element preloaded against an outlet valve seat counter to a pressure force acting from the pressure chamber;the valve arrangement includes a pressure-limiting valve with a pressure-limiting valve closing element preloaded against a pressure-limiting valve seat counter to a pressure force acting from the high-pressure region;the outlet valve and the pressure-limiting valve are mounted in two separate receptacle bores in a common valve housing;the two separate receptacle bores extend along a longitudinal axis of the valve housing from a junction surface at a first longitudinal end of the valve housing into the valve housing;the valve housing defines a central flow bore at a second longitudinal end arranged opposite the first ...

ERROR DIAGNOSIS DEVICE AND ERROR DIAGNOSIS METHOD

The error diagnosis device has: an input unit that receives a downstream pressure value and an upstream pressure value, said downstream pressure value being detected on the downstream side of a fuel pump and said upstream pressure value being detected on the upstream side of the fuel pump; and a determination unit that, if the downstream pressure value is less than a preset first threshold value, determines whether or not the upstream pressure value is less than a preset second threshold value. The determination unit determines that an error has occurred further upstream than the fuel pump if the upstream pressure value is less than the second threshold value and determines that an error has occurred in the fuel pump if the upstream pressure value is at least the second threshold value 1. A malfunction diagnosis device , comprising:an input section that receives a downstream pressure value and an upstream pressure value in a fuel supply system, the downstream pressure value being detected on a downstream side of a fuel pump that pressurizes and discharges fuel pumped up from a storage section in the fuel supply system, the upstream pressure value being detected on an upstream side of the fuel pump; anda determination section that determines, when the downstream pressure value is less than a preset first threshold value, whether the upstream pressure value is less than a preset second threshold value,wherein the determination section determines that a malfunction has occurred on the upstream side of the fuel pump, when the upstream pressure value is less than the second threshold value, andthe determination section determines that a malfunction has occurred at the fuel pump, when the upstream pressure value is equal to or more than the second threshold value.2. The malfunction diagnosis device according to claim 1 , wherein:the downstream pressure value is a pressure value of the fuel in a common rail that stores under pressure the fuel discharged from the fuel pump. ...

CONTROL DEVICE FOR ENGINE

A control device for controlling an engine provided with a fuel pump including a pressurizing chamber, a plunger inserted into the pressurizing chamber and which changes a volume of the pressurizing chamber, and an on-off valve configured to open and close a suction port, is provided. When a pressurizing cycle consists of a period of pressurizing stroke in which the volume of the pressurizing chamber is reduced to allow fuel to be pressurized and a period of suction stroke in which the volume of the pressurizing chamber is increased to allow fuel to be drawn into the pressurizing chamber, a closing cycle of the on-off valve is controlled so that a ratio of the closing cycle to the pressurizing cycle becomes smaller in a second combustion mode where a partial compression-ignition combustion is performed than in a first combustion mode where SI combustion is performed. 1. A control device for controlling an engine provided with a fuel injector configured to inject fuel into a cylinder , a spark plug configured to ignite a mixture gas inside the cylinder , a fuel storage configured to store fuel to be introduced into the fuel injector , a fuel pump configured to pump fuel into the fuel storage , and a low-pressure fuel passage through which fuel to be introduced into the fuel pump flows , the control device comprising: a combustion controller to switch a combustion mode of the mixture gas between a first combustion mode and a second combustion mode by controlling each component of the engine according to an operating state of the engine; and', 'a pump controller to control the fuel pump,, 'a processor configured to executewherein in the first combustion mode, the mixture gas is combusted by SI combustion where the spark plug ignites the mixture gas, and in the second combustion mode, a portion of the mixture gas is combusted by spark ignition (SI) combustion where the spark plug ignites the mixture gas, and then the remaining mixture gas is combusted by compression ...

LINE TERMINATION ELEMENT FOR A VENTILATION OUTLET OF A FLUID CONTAINER, AND FLUID CONTAINER

The invention relates to a line termination element () for a ventilation outlet of a fluid container (), having a main body () which is formed as a closure element for a free end () of the ventilation outlet and which is cross-sectionally matched to the cross section of the ventilation outlet, comprising at least one flow passage as an insect barrier, which flow passage is smaller than a mouth cross section () of the ventilation outlet, and also at least one valve body (), which, in a first position, closes off the mouth cross section () of the ventilation outlet and, in a second position, opens up the mouth cross section () of the ventilation outlet. 1456317101717. A line termination element () for a ventilation outlet of a fluid container () , having a main body () which is formed as a closure element for a free end of the ventilation outlet () and which is cross-sectionally matched to the cross section of the ventilation outlet , comprising at least one flow passage as an insect barrier , which flow passage is smaller than a mouth cross section () of the ventilation outlet , and also at least one valve body () , which , in a first position , closes off the mouth cross section () of the ventilation outlet and which , in a second position , opens up the mouth cross section () of the ventilation outlet.246. The line termination element () as claimed in claim 1 , characterized in that the main body () is formed as a closure cap for the free end of the ventilation outlet.346739. The line termination element () as claimed in either of and claim 1 , characterized in that the main body () surrounds a receiving space () for the free end of the ventilation outlet () claim 1 , and a valve chamber ().441073. The line termination element () as claimed in claim 3 , characterized in that the valve body () delimits the receiving space () for the free end of the ventilation outlet ().5410973. The line termination element () as claimed in or claim 3 , characterized in that the ...

Two stage valve with conical seat for flow shut-off and spool knife edge for metering flow control

A valve ( 100 ) comprises a barrel ( 104 ) having a central bore ( 110 ), an inlet ( 112 ), and an outlet ( 114, 116 ), and a spool ( 120 ) disposed for motion within the central bore, including a ball tip ( 128 ), a metering edge ( 130 ), and a bore ( 132 ). The spool is moveable between a closed position, wherein the ball tip engages a seat ( 142 ) to prevent fluid flow through the inlet and the metering edge is disposed in a lower chamber ( 148 ) of the central bore to prevent the fluid flow through the outlet, and an opened position, wherein the tip is spaced apart from the seat to permit fluid flow through the inlet and the spool bore into an upper chamber ( 154 ) of the central bore to equalize pressure on the spool, and the metering edge is disposed in a flow path of the outlet to permit fluid flow through the outlet.

METHODS AND SYSTEM FOR A FUEL SYSTEM

Various methods and systems are provided for health assessments of a fuel system. In one example, a fuel system includes a low-pressure pump operable to pump fuel from a fuel source at a first pressure, a high-pressure pump operable to increase the first pressure to a second pressure, a valve positioned between the low-pressure pump and the high-pressure pump and operable to control fuel flow to the high-pressure pump, a common fuel rail fluidly coupling the high-pressure pump to a plurality of fuel injectors coupled to cylinders of an engine, and a controller. The controller is operable to adjust an amount of valve electrical current supplied to the valve to reach a commanded pressure of the common fuel rail during cylinder firing conditions, the supplied valve electrical current adjusted based on a valve pre-firing correction factor for the valve obtained based on valve electrical current prior to cylinder firing commencing. 1. A fuel system , comprising:a low-pressure fuel pump operable to pump fuel from a fuel source at a first pressure;a high-pressure fuel pump operable to increase the first pressure to a second pressure;a valve positioned between the low-pressure fuel pump and the high-pressure fuel pump, the valve being operable to control fuel flow to the high-pressure fuel pump;a common fuel rail fluidly coupling the high-pressure fuel pump to a plurality of fuel injectors that is operable to inject fuel to cylinders of an engine; anda controller operable to adjust an amount of valve electrical current supplied to the valve to reach a commanded pressure of the common fuel rail during cylinder firing conditions, the supplied valve electrical current adjusted based on a valve pre-firing correction factor for the valve obtained based on valve electrical current prior to cylinder firing commencing.2. The fuel system of claim 1 , wherein the controller is operable to obtain the pre-firing correction factor by:opening the valve until a pre-firing pressure of the ...

ENGINE FUEL PUMP AND METHOD FOR OPERATION THEREOF

A method of pressuring fuel for a direct injection fuel system via a fuel pump in an engine is provided. The method includes, during a first mode, adjusting a magnetic solenoid valve (MSV) to control pump outlet pressure and during a second mode, deactivating the MSV and controlling pump outlet pressure via a noise-reducing valve assembly on an inlet side of the fuel pump. 1. A method of pressuring fuel for a direct injection fuel system via a fuel pump in an engine , comprising:during a first mode, adjusting a magnetic solenoid valve (MSV) to control pump outlet pressure; andduring a second mode, deactivating the MSV and controlling pump outlet pressure via a noise-reducing valve assembly on an inlet side of the fuel pump.2. The method of claim 1 , where the first mode includes an operating condition when the engine is over a threshold speed and the second mode includes an operating condition when the engine is below the threshold speed.3. The method of claim 1 , where controlling pump outlet pressure includes selectively permitting an inhibiting fuel flow into a pump chamber in the fuel pump claim 1 , and wherein the noise-reducing valve assembly includes a check valve and is only mechanically actuated.4. The method of claim 3 , where the fuel is selectively permitted and inhibited to flow into the pump chamber during at least one of a delivery stroke and an intake stroke of the fuel pump.5. The method of claim 1 , where the first mode includes an operating condition when the fuel pump is performing a delivery stroke.6. The method of claim 1 , where the second mode includes an operating condition when the fuel pump is performing an intake stroke claim 1 , and wherein during the second mode claim 1 , the MSV valve is not electrically adjusted.7. The method of claim 1 , where during the second mode the deactivated MSV is deactivated in an open position.8. The method of claim 1 , where controlling pump outlet pressure via the noise reducing valve includes passively ...

FUEL SUPPLY SYSTEM FOR LPG VEHICLE

A returnless fuel supply system applicable to an LPG vehicle is provided. The system supplies LPG fuel from an LPG bombe to an engine at a predetermined pressure or greater and prevents the generation of vapor in the LPG fuel, thereby eliminating a need to return a portion of the LPG fuel supplied to the engine to the LPG bombe. Through the application of the returnless fuel supply system that does not return the high temperature fuel to the LPG bombe, the cause of the internal pressure increase in the LPG bombe is eliminated, and thus efficient refueling of LPG bombe with LPG fuel is achieved. 1. A fuel supply system for a liquefied-petroleum-gas (LPG) vehicle , comprising:a first fuel supply line connected to an engine and to a fuel pump mounted in an LPG bombe;a 3-way solenoid valve mounted on a rear end portion of the first fuel supply line;a regulator mounted on a front end portion of the first fuel supply line and include a solenoid valve that allows or blocks a flow of LPG fuel toward the engine and a pressure sensor configured to measure a pressure in a fuel line through which the LPG fuel flows;a second fuel supply line branched from the 3-way solenoid valve and connected to the first fuel supply line near a regulator inlet;an auxiliary pump assembly mounted on the second fuel supply line to pressurize the fuel flowing through the second fuel supply line to a reference pressure or greater and remove vapor contained in the fuel; anda controller configured to turn the 3-way solenoid valve on or off and operate the auxiliary pump assembly.2. The system of claim 1 , wherein the auxiliary pump assembly includes:an auxiliary chamber having a predetermined volume;a vapor removal filter mounted on an inlet side of the auxiliary chamber to primarily break the vapor contained in the LPG fuel; andan auxiliary pump fixedly mounted inside the auxiliary chamber via a bracket to pressurize the LPG fuel to the reference pressure or greater.3. The system of claim 2 , ...

SYSTEMS FOR FUEL DELIVERY

Various systems are provided for delivering fuel to an engine. In one example, a system includes a controller and a fluid system configured to maintain a fluid at a pressure downstream of a check valve. The controller may be configured to determine if a leak is present in the fluid system based on a first pressure decay rate of the fluid system, and responsive to identifying that a leak is present in the fluid system, differentiate between an internal leak and an external leak based on a leak flow rate as fluid system pressure decreases. 1. A system , comprising:a fluid system configured to maintain a fluid at a pressure downstream of a check valve; and determine if a leak is present in the fluid system based on a first pressure decay rate of the fluid system; and', 'responsive to identifying that a leak is present in the fluid system, differentiate between an internal leak and an external leak based on a leak flow rate as fluid system pressure decreases., 'a controller configured to2. The system of claim 1 , wherein the controller is configured to differentiate between an internal leak and an external leak based on a directionality of a change in the leak flow rate as the fluid system pressure decreases.3. The system of claim 2 , wherein the fluid system comprises a fuel system of an engine including a high-pressure pump to deliver fuel to a fuel rail claim 2 , and wherein the check valve is positioned in the high-pressure fuel pump.4. The system of claim 3 , wherein the controller is configured to determine the leak is an internal leak if the leak flow rate increases as pressure in the fuel system decreases.5. The system of claim 3 , wherein the controller is configured to determine the leak is an external leak if the leak flow rate decreases as pressure in the fuel system decreases.6. The system of claim 3 , wherein the controller is configured to maintain engine operation in response to determining that the leak is an internal leak and shut down the engine in ...

Improved fuel system for diesel type engines using carbonaceous aqueous slurry fuels

The present invention provides an improved fuel injection system and related method for controlling fuel heating and circulation in diesel type engines configured to use carbonaceous aqueous slurry fuels. The fuel injection system comprises: at least one fuel injector including an injector nozzle through which fuel is atomised and a fuel injector pump for pressurising fuel for supply to the injector nozzle; and a controlled bleed valve fluidly connected to each fuel injector and positioned to allow a controlled amount of carbonaceous aqueous slurry fuel to flow from the fuel injector.

High-Pressure Fuel Pump

Various embodiments may include a high-pressure fuel pump with: a pump housing including a pressure chamber and a pump piston movable up and down within the pressure chamber along a movement axis; and a low-pressure damper including a damper volume arranged on the pump housing and damper elements distributed symmetrically around a damper longitudinal axis. The damper longitudinal axis is arranged at an angle of between 5° and 175° in relation to the movement axis. 1. A high-pressure fuel pump comprising:a pump housing including a pressure chamber and a pump piston movable up and down within the pressure chamber along a movement axis; anda low-pressure damper including a damper volume arranged on the pump housing and damper elements distributed symmetrically around a damper longitudinal axis;wherein the damper longitudinal axis is arranged at an angle of between 5° and 175° in relation to the movement axis.2. The high-pressure fuel pump as claimed in claim 1 , wherein the damper longitudinal axis is substantially perpendicular to the movement axis of the pump piston.3. The high-pressure fuel pump as claimed in claim 1 , wherein an intersection point between the damper longitudinal axis and the movement axis is disposed within the pressure chamber.4. The high-pressure fuel pump as claimed in claim 1 , wherein the damper elements each comprise:a damping device and a damper cover jointly defining the damper volume of the low-pressure damper; anda spacer for prestressing the damping device;wherein the damper elements are arranged in the damper volume along the damper longitudinal axis.5. The high-pressure fuel pump as claimed in claim 1 , wherein the pump housing comprises:an inflow region for supplying fuel to the pressure chamber; anda drive region situated opposite the pressure chamber along the movement axis of the pump piston; anddrive elements for driving the pump piston arranged in said drive region;wherein the inflow region and the drive region are fluidically ...

LOW IMPACT NOISE SOLENOID VALVE

In some examples, a static part includes a static body and a first cylindrical extension extending from the static body, the first cylindrical extension including an open end with a cylindrical inner surface having a first diameter. A moveable part is moveable toward the static part by the magnetic flux of a solenoid. The moveable part may include a moveable body and a second cylindrical extension extending from the moveable body, the second cylindrical extension including a cylindrical outer surface having a second diameter, smaller than the first diameter, to enable the cylindrical outer surface to move within the open end. The second diameter is sized for the cylindrical outer surface to pass adjacent to the cylindrical inner surface to enable passage of a portion of the magnetic flux radially to reduce an energy of impact between the moveable part and the static part. 1. A valve comprising:a valve mechanism;a solenoid coil able to be activated to generate a magnetic flux;a static part located at least partially within the solenoid coil, the static part including a static body and a first cylindrical extension extending from the static body, the first cylindrical extension including an open end with a cylindrical inner surface having a first diameter, the first cylindrical extension further including an inner groove located between the cylindrical inner surface and the static body, the inner groove having a second diameter, wherein the second diameter of the inner groove is larger than the first diameter of the cylindrical inner surface; anda moveable part being moveable toward the static part by the magnetic flux in response to activation of the solenoid coil for changing a condition of the valve mechanism, the moveable part including a moveable body and a second cylindrical extension extending from the moveable body, the second cylindrical extension including a cylindrical outer surface having a third diameter and an outer groove located between the cylindrical ...

High-Pressure Fuel Supply Pump

To increase a valve-opening pressure at which a pressure relief valve is opened in order to deal with a higher pressure of the fuel, a large pressure relief valve is installed in a high-pressure fuel supply pump. This upsizes the high-pressure fuel supply pump. A pressure relief valve is installed in a discharge joint. This can provide a high-pressure fuel supply pump that is not large too much and sufficiently performs a relief function by efficiently using the excessive space in the pump even when the fuel pressure is increased.

Valve Assembly for a Fuel Injection System, and Fuel Injection System

A valve arrangement for a fuel injection system includes a first valve unit () having a first flow cross section (Q) and a second valve unit () having a second flow cross-section Q). The second valve unit includes at least two single valves (), each of which has a single valve flow cross-section Q). The second flow cross-section (Q) is formed by a sum of the single valve flow cross-sections (Q). A fuel injection system () incorporates such a valve arrangement (). 1. A valve arrangement for a fuel injection system of an internal combustion engine , wherein:the valve arrangement comprises a valve housing, a first valve unit having a first flow cross section, and a second valve unit having a second flow cross-section;the first valve unit and the second valve unit are received in the valve housing and are connected antiparallel to one another;the second valve unit comprises at least two mutually hydraulically separate, parallel-connected single valves which each have a respective single valve flow cross-section; andthe second flow cross-section of the second valve unit is formed by a sum of the single valve flow cross-sections of the single valves.2. The valve arrangement according to claim 1 , wherein the respective single valve flow cross-sections are different from one another claim 1 , and/or respective opening pressures of the single valves are different from one another.3. The valve arrangement according to claim 1 , wherein the first valve unit comprises only one single valve claim 1 , and/or the second valve unit comprises from three to five of the single valves.4. The valve arrangement according to claim 1 , wherein the single valves of the second valve unit and the first valve unit are arranged symmetrically around a valve housing longitudinal axis of the valve housing on a cross-sectional surface which is perpendicular to the valve housing longitudinal axis.5. The valve arrangement according to claim 1 , wherein the single valves of the second valve unit are ...

Electromagnetically Actuated Rate Control Valve, in Particular for Controlling the Delivery Rate of a High-Pressure Fuel Pump

An electromagnetically actuable rate control valve for controlling a delivery rate of a high-pressure pump includes an electromagnet, a valve element, an armature shaft, and at least one strength element. The valve element is movable in an axial direction and is configured to open and to close the electromagnetically actuable rate control valve. The armature shaft transmits a force. The force is produced by the electromagnet and acts on the valve element in the axial direction. The at least one strength element is configured to raise at least the strength of the armature shaft. The armature shaft includes a needle region adjacent to the valve element and an armature region remote from the valve element. The needle region and the armature region are integral with each other. 1. An electromagnetically actuable rate control valve for controlling a delivery rate of a high-pressure pump , comprising:an electromagnet;a valve element movable in an axial direction and configured to open and to close the rate control valve;an armature shaft configured to transmit a force, produced by the electromagnet, the force acting on the valve element in the axial direction, the armature shaft including a needle region adjacent to the valve element and an armature region remote from the valve element, the needle region integral with the armature region; andat least one strength element configured to raise at least the strength of the armature shaft.2. The electromagnetically actuable rate control valve as claimed in claim 1 , wherein:the needle region has a first diameter that is smaller than a second diameter of the armature region; andthe at least one strength element is a rounded portion of an edge situated at a transition between the needle region and the armature region.3. The electromagnetically actuable rate control valve as claimed in claim 2 , wherein:the rounded portion includes a first partial rounded portion facing the needle region and having a first rounding radius, and a ...

High-Pressure Fuel Supply Pump

A fuel supply pump includes a pressurizing chamber, a high-pressure path, and a valve unit. The valve unit includes an outlet valve which is configured to open to allow fuel in the pressurizing chamber to flow to the high-pressure path when fuel pressure in the pressurizing chamber becomes higher than a first predetermined pressure. The valve unit also includes a pressure relief valve which is configured to open to allow fuel in the high-pressure path to return to the pressurizing chamber when fuel pressure in the high-pressure path becomes higher than a second predetermined pressure. The valve unit also includes a valve seat member in which a relief path and a plurality of outlet paths are formed, wherein a first end of the relief path opens on a relief valve seat for the pressure relief valve, and respective first ends of the plurality of outlet paths open on an outlet valve seat for the outlet valve. 1. A fuel supply pump comprising:a pressurizing chamber which is formed in a pump body;a high-pressure path which is provided on a discharge side of the pressurizing chamber; and an outlet valve which is configured to open to allow fuel in the pressurizing chamber to flow to the high-pressure path when fuel pressure in the pressurizing chamber becomes higher than a first predetermined pressure;', 'a pressure relief valve which is configured to open to allow fuel in the high-pressure path to return to the pressurizing chamber when fuel pressure in the high-pressure path becomes higher than a second predetermined pressure; and', 'a valve seat member in which a relief path and a plurality of outlet paths are formed, wherein a first end of the relief path opens on a relief valve seat for the pressure relief valve, and respective first ends of the plurality of outlet paths open on an outlet valve seat for the outlet valve., 'a valve unit which is arranged between the pressurizing chamber and the high-pressure path, the valve unit having2. The fuel supply pump according to ...

SYSTEMS FOR FUEL DELIVERY

Various systems are provided for delivering fuel to an engine. In one example, a system includes a controller and a fluid system configured to maintain a fluid at a pressure downstream of a check valve. The controller may be configured to determine if a leak is present in the fluid system based on a first pressure decay rate of the fluid system, and responsive to identifying that a leak is present in the fluid system, differentiate between an internal leak and an external leak based on a leak flow rate as fluid system pressure decreases. 1. A system , comprising:a gaseous fuel supply system to supply gaseous fuel from a gaseous fuel storage source to an engine having a plurality of cylinders; and detect a request to shut down the engine; and', 'in response to detecting the request, remove gaseous fuel trapped within the gaseous fuel supply system by closing a gaseous fuel supply valve and selectively fueling gaseous fuel to the engine., 'a controller configured to2. The system of claim 1 , wherein the gaseous fuel supply system comprises a gaseous fuel rail including a plurality of gas admission valves claim 1 , each gas admission valve to supply gaseous fuel to a respective cylinder of the plurality of cylinders claim 1 , wherein the gaseous fuel supply valve is located upstream of the gaseous fuel rail claim 1 , and wherein the gaseous fuel trapped within the gaseous fuel supply system is trapped between the gaseous fuel supply valve and plurality of gas admission valves.3. The system of claim 1 , wherein the engine is configured to combust liquid fuel and gaseous fuel claim 1 , wherein to selectively fuel gaseous fuel to the engine claim 1 , the controller is configured to supply both gaseous fuel and liquid fuel to each cylinder of a subset of cylinders of the plurality of cylinders claim 1 , thereby to combust the gaseous fuel trapped within the gaseous fuel supply system claim 1 , the subset including at least one cylinder but less than all cylinders of the ...

Method and apparatus for correction of pressure wave affected fuel injection

A fuel injection system ( 1 ) of a combustion engine includes: at least one fuel injection actuator ( 3 ) to inject fuel into a cylinder ( 2 ) of the combustion engine, a high pressure fuel supply system to supply the fuel injection actuators ( 3 ) with fuel, and a control logic device ( 12 ) including an artificial neural network ( 12 A) to calculate pressure correction data (pcd) used to correct pressure waves, PW, generated by at least one actuator of the fuel injection system ( 1 ).

HIGH-PRESSURE FUEL PUMP

A high-pressure fuel pump includes a fuel chamber, a pressurizing chamber, a cylinder, a plunger, and a control valve. The control valve includes a valve seat having a valve hole, a valve member, a movable portion having a needle, a valve opening spring, a coil, and a projecting-side stopper. The needle is configured to project from the valve hole and thus separate the valve member from the valve seat. When the control valve is in an open-valve mode, the movable portion contacts the projecting-side stopper and the valve member is separate from the valve seat. The size of the clearance formed between the valve member and the valve seat when the control valve is in the open-valve mode is set such that the clearance functions as a passage restriction for causing pressure loss in the fuel flowing from the pressurizing chamber to the fuel chamber. 1. A high-pressure fuel pump comprising:a fuel chamber that is configured to draw in fuel after the fuel is pumped from a fuel tank by a feed pump;a pressurizing chamber that is configured such that the fuel flows from the fuel chamber into the pressurizing chamber;a cylinder that defines a section of the pressurizing chamber;a plunger that reciprocates in the cylinder and is configured to change the volume of the pressurizing chamber by reciprocating, thereby pressurizing the fuel in the pressurizing chamber and discharging the fuel from the pressurizing chamber; anda control valve, wherein a valve seat having a valve hole that allows the fuel chamber and the pressurizing chamber to be continuous with each other,', 'a valve member that is configured to become seated on the valve seat to block the valve hole when moving from the pressurizing chamber toward the fuel chamber,', 'a movable portion that has a needle configured to project from the valve hole toward the pressurizing chamber to separate the valve member from the valve seat,', 'a valve opening spring that urges the movable portion in a direction of projecting the ...

INLET VALVE ARRANGEMENT FOR A FUEL PUMP

An inlet valve arrangement for a pump head of a fuel pump for use in a common rail fuel injection system comprises an inlet valve member moveable between open and closed positions to control the flow from a source of low-pressure fuel to a pumping chamber of the fuel pump. The inlet valve member is arranged to open in response to the pressure difference between the fluid pressure of fuel on an inlet side of the inlet valve member and the fluid pressure in the pumping chamber exceeding a threshold value. The inlet valve arrangement comprises means for selectively applying a closing force on the inlet valve member to bias it toward the closed position, such that, in use, the application of the closing force by said means acts to increase the threshold value of the pressure difference at which the inlet valve member opens. 1. An inlet valve arrangement for a pump head of a fuel pump for use in a common rail fuel injection system , the inlet valve arrangement comprising;an inlet valve member moveable between open and closed positions to control the flow from a source of low-pressure fuel to a pumping chamber of the fuel pump, wherein the inlet valve member is arranged to open in response to the pressure difference between the fluid pressure of fuel on an inlet side of the inlet valve member and the fluid pressure in the pumping chamber exceeding a threshold value;the inlet valve arrangement comprising means for selectively applying a closing force on the inlet valve member to bias it toward the closed position, such that, in use, the application of the closing force by said means acts to increase the threshold value of the pressure difference at which the inlet valve member opens.2. An inlet valve arrangement according to claim 1 , wherein said means for selectively applying a closing force is operable to apply a force which varies proportionally with a control signal claim 1 , optionally a control current.3. An inlet valve arrangement according to claim 1 , wherein ...

VALVE DEVICE AND HIGH PRESSURE PUMP USING THE SAME

A valve seat has an inner passage and outer passages. A suction valve member has first passages and a first projection portion that guides, to the first passages, the fuel that flows from a pressure chamber at the time of valve opening. Therefore, an action force by the dynamic pressure applied to the suction valve member in the valve closing direction is reduced. An action force by the pressure of fuel that flows into pressure equalization grooves counterbalances the action force by the dynamic pressure of the suction valve member. Therefore, self-closing by the dynamic pressure can be inhibited, and the maximum output of an electromagnetic driving unit can be reduced. Fuel flow through a passage radially outside the suction valve member and the firs passages. A fluid passage area is securable even when a lift amount of the suction valve member is small. 1. A high-pressure pump , comprising:a plunger;a pressure chamber with a volumetric capacity that changes when the plunger moves;a fuel suction portion having a valve;a valve body;a valve seat having an inner hole portion located inward in a radial direction of the valve body and an outer hole portion located outward in a radial direction of the valve body with respect to the inner hole portion;a valve member that is configured to abut against and move away from the valve seat; anda driving unit that is configured to inhibit movement of the valve member toward the valve seat, wherein:the outer hole portion is a hole; andthe driving unit is inserted in the inner hole portion.2. The high-pressure pump according to claim 1 , wherein a portion of the driving is within the inner hole portion and the portion of the driving unit is rigid.3. The high-pressure pump according to claim 1 , wherein the driving unit extends through the valve seat from a side opposite the valve member to a same side as the valve member.4. The valve device according to claim 1 , wherein:a plurality of first passages are provided in a ...

FUEL PUMP FOR AN INTERNAL COMBUSTION ENGINE

Fuel pump for an internal combustion engine, wherein the fuel pump has: an auxiliary tank designed to receive a fuel flow from a low-pressure fuel pump; a pumping device drawing the fuel from the auxiliary tank through a suction duct; a Venturi choke arranged along the suction duct; and a degasification duct, which originates in a ceiling of the auxiliary tank and leads to the middle of the Venturi choke. 1525. A fuel pump () for an internal combustion engine () , wherein the fuel pump () comprises:{'b': 8', '4, 'an auxiliary tank (), which is designed to receive a fuel flow from a low-pressure fuel pump ();'}{'b': 9', '8', '10, 'a pumping assembly (), which draws fuel from the auxiliary tank () through a suction duct ();'}{'b': 13', '8, 'a degasification duct (), which originates in a ceiling of the auxiliary tank (); and'}{'b': 12', '10, 'at least one Venturi choke (), which is arranged along the suction duct ();'}{'b': 13', '12, 'wherein the degasification duct () leads to the middle of the Venturi choke ().'}251210. The fuel pump () according to claim 1 , wherein the Venturi choke () comprises a progressive and local reduction of the flowing section of the suction duct ().3512. The fuel pump () according to claim 1 , wherein the Venturi choke () comprises:{'b': 21', '12, 'a converging segment () with the shape of a truncated cone, where the flowing section is progressively reduced until it reaches a minimum value in the middle of the Venturi choke (); and'}{'b': 22', '12, 'a diverging segment () with the shape of a truncated cone, where the flowing section is progressively increased from the minimum value to the value present upstream and downstream of the Venturi choke ().'}451223132122. The fuel pump () according to claim 3 , wherein the Venturi choke () comprises an intermediate segment () with a constant section claim 3 , to which the degasification duct () leads and which is arranged between the converging segment () and the diverging segment ().5513128. ...

Metal Diaphragm Metal Damper and Fuel Pump Provided With Same

Provided is a metal diaphragm that can be easily processed and manufactured at low cost. Therefore, a metal diaphragm () of the present invention is configured such that a curvature radius r of a first curved portion located on the outermost side in the radial direction (outer side in the left-right direction in FIG. ) is minimized among a flange portion () and curved portions () that are located on the radially inner side of the flange portion () and curved from the flange portion () to one side (upper side in FIG. ). 1. A metal diaphragm comprising:a flange portion; andcurved portions each of which is located on a radially inner side of the flange portion and curved to one side from the flange portion,{'b': '1', '#text': 'wherein a curvature radius r of a first curved portion located on an outermost side in a radial direction is minimized.'}2. The metal diaphragm according to claim 1 , wherein{'b': ['1', '2'], '#text': 'when the curved portion has a plurality of curvature radii, a maximum curvature radius r of the first curved portion is minimized with respect to a minimum curvature radius r of a second curved portion that curves from the flange portion to a same side as the first curved portion.'}3. The metal diaphragm according to claim 2 , further comprisinga third curved portion that is located between the first curved portion and the second curved portion in the radial direction and curves from the first curved portion to an opposite side of the first curved portion,{'b': ['1', '3'], '#text': 'wherein the maximum curvature radius r of the first curved portion is minimized with respect to a minimum curvature radius r of the third curved portion.'}4. The metal diaphragm according to claim 1 , wherein{'b': ['1', '2'], '#text': 'a radial length L of the first curved portion is smaller than a radial length L of a second curved portion curved to a same side as the first curved portion.'}5. The metal diaphragm according to claim 4 , further comprisinga third curved ...

METHOD FOR OPERATING AN INTERNAL COMBUSTION ENGINE, INJECTION SYSTEM FOR AN INTERNAL COMBUSTION ENGINE AND INTERNAL COMBUSTION ENGINE

A method for operating an internal combustion engine having an injection system which has a high-pressure accumulator, wherein a high pressure in the high-pressure accumulator is regulated via a suction throttle on the low-pressure side as a first pressure control member in a first high-pressure control loop, wherein in a normal operation a high-pressure disturbance variable is produced via a pressure control valve on the high-pressure side as a second pressure control member, via which fuel is redirected from the high-pressure accumulator to a fuel reservoir. For this purpose, the high pressure in a safety operation is regulated by the pressure control valve via a second high pressure control loop, or, in the safety operation, a maximum fuel volume flow is continuously redirected from the high pressure accumulator to the fuel reservoir via the pressure control valve. 110-. (canceled)11. A method for operating an internal combustion engine having an injection system with a high-pressure accumulator , the method comprising the steps of: regulating a high pressure in the high-pressure accumulator using a low-pressure-side suction throttle as a first pressure setting element a first high-pressure regulating loop; generating , in a normal operating mode , a high-pressure disturbance variable using of a high-pressure-side pressure regulating valve as a second pressure setting element by way of which fuel is discharged from the high-pressure accumulator into a fuel reservoir; and , in a protective operating mode , regulating the high pressure using the pressure regulating valve by way of a second high-pressure regulating loop , or permanently opening the pressure regulating valve in the protective operating mode.12. The method according to claim 11 , including setting a first operation type of the protective operating mode if the high pressure reaches or overshoots a first pressure threshold value claim 11 , wherein claim 11 , in the first operation type claim 11 , the ...

DIRECT INJECTION FUEL PUMP

Methods and systems are provided for a direct injection fuel pump. The methods and system control pressure within a compression chamber so as to improve fuel pump lubrication. 1. A method , comprising: 'adding a pre-loaded accumulator upstream of the solenoid activated check valve, the pre-loaded accumulator having a substantially constant pressure-volume characteristic.', 'while a solenoid activated check valve at an inlet of a direct injection fuel pump is commanded to a pass-through state during a compression stroke in the direct injection fuel pump,'}2. The method of claim 1 , wherein a pressure relief valve is not positioned upstream of the solenoid activated check valve.3. The method of claim 2 , wherein the pre-loaded accumulator is in fluidic communication with a compression chamber of the direct injection fuel pump.4. The method of claim 3 , wherein the substantially constant pressure-volume characteristic of the pre-loaded accumulator is provided by a pre-loaded spring coupled to a piston in a bore with stops.5. The method of claim 3 , wherein the substantially constant pressure-volume characteristic of the pre-loaded accumulator is provided by a diaphragm with a pre-loaded spring with stops.6. The method of claim 3 , further comprising providing a pressure in the compression chamber of the direct injection fuel pump claim 3 , the pressure enabling a differential pressure greater than a threshold differential pressure between a top and a bottom of a piston of the direct injection fuel pump during the compression stroke in the direct injection fuel pump.7. The method of claim 6 , wherein the pressure is regulated via the pre-loaded accumulator as it provides fuel and pressure to the compression chamber of the direct injection fuel pump.8. The method of claim 2 , wherein a leak orifice enables a flow of fuel from the pre-loaded accumulator claim 2 , the flow of fuel being directed to an inlet of a check valve located upstream of the solenoid activated check ...

METHOD AND DEVICE FOR CONTROLLING A QUANTITY CONTROL VALVE

In a fuel system of an internal combustion engine, fuel is delivered by a high-pressure pump into a fuel rail. The quantity of the delivered fuel is influenced by a quantity control valve () actuated by an electromagnetic actuating device. A limit-value retaining current is ascertained, at which the quantity control valve still remains in its closed state or is just opening. 19-. (canceled)10. A method for controlling a quantity control valve of a high-pressure pump , comprising:controlling, using a first selected value of a control signal, the quantity control valve to assume a closed state;controlling, using a second selected value of the control signal, the quantity control valve to assume an opened state; andascertaining a limit-value retaining current at which the quantity control valve one of (i) remains in the closed state or (ii) is just opening.11. The method as recited in claim 10 , wherein the limit-value retaining current is ascertained on the basis of a fuel pressure signal.12. The method as recited in claim 10 , wherein the application of current to the quantity control valve is prolonged beyond the lower dead center.13. The method as recited in claim 11 , wherein the value of the control signal is increased claim 11 , beginning from a starting value at which the quantity control valve remains open claim 11 , until a rise in the fuel pressure signal occurs claim 11 , so that the limit-value retaining current is determined on the basis of the control signal at which the pressure increase occurs.14. The method as recited in claim 11 , wherein the value of the control signal is reduced claim 11 , beginning from a starting value at which the quantity control valve remains closed claim 11 , until a drop occurs in the fuel pressure signal claim 11 , so that the limit-value retaining current is determined on the basis of the control signal at which a pressure drop occurs.15. The method as recited in claim 11 , wherein the value of the control signal is ...

Piston Fuel Pump

A piston-type fuel pump for an internal combustion engine includes a pump housing, a piston, an annular counterplate, and a non-return outlet valve. The pump housing includes a stepped opening and a piston opening. The piston is guided in the piston opening. The counterplate is pressed into the stepped opening and includes a valve seat. The non-return valve includes a valve element and a guide element. The guide element guides the valve element, is arranged radially outside the valve element and in the stepped opening, and includes a guide section, a retention section, and a support section. The guide section guides the valve element, the retention section is connected to the guide section via a radially extending connecting section, and the support section supports a valve spring. The sections are arranged axially at different points such that the guide section is between the counterplate and the support section. 1. A piston-type fuel pump for an internal combustion engine , comprising:a pump housing including a stepped opening and piston opening separate from the stepped opening, the stepped opening having a first stepped portion defining a first inner diameter and a second stepped portion defining a second inner diameter, the first inner diameter greater than the second inner diameter;a piston guided in the piston opening of the pump housing;an annular counterplate pressed into the second stepped portion of the second stepped opening and including a valve seat; and a valve element; and', 'a guide element configured to guide movement of the valve element, arranged in the stepped opening of the pump housing, and including:', 'a guide section configured to guide the valve element;', 'a retention section connected to the guide section via a radially extending connecting section; and', 'a support section configured to support an end of a valve spring,, 'a non-return outlet valve that includeswherein the guide section, the retention section, and the support section are ...

DEVICE FOR CONTROLLING HIGH-PRESSURE PUMP

A high-pressure pump includes a plunger that varies a volume of a pressurizing chamber, and a control valve that controls supply of fuel into the pressurizing chamber through a first valve body. When a predetermined execution condition is satisfied, an ECU reduces power supplied to a coil more than that in a normal control to implement a noise reduction control for reducing an operating noise generated along with the driving of the valve body. During the noise reduction control, a responsiveness parameter indicating responsiveness from starting energization of the coil until the valve body is displaced to a valve closing position is acquired. An energization start timing in the noise reduction control is calculated based on the acquired responsiveness parameter after the parameter is acquired. As a result, a discharge amount control of the high-pressure pump can be appropriately implemented in the noise reduction control. 1. A high-pressure pump control unit applied to a high-pressure pump including a pressurizing chamber connected to an intake passage and a discharge passage for fuel , a plunger that varies a volume of the pressurizing chamber , and a control valve that is disposed in the intake passage and displaces a valve body in an axial direction due to a power supply to an electromagnetic unit to cut off a supply of fuel to the pressurizing chamber , the high-pressure pump control unit regulating a fuel discharge amount of the high-pressure pump based on an energization start timing of the electromagnetic unit , the high-pressure pump control unit comprising:a noise reduction control unit that, when a predetermined execution condition is satisfied, reduces a power supplied to the electromagnetic unit as compared to during a normal control in which the execution condition is not satisfied, thereby reducing an operating noise generated along with the driving of the valve body;a responsiveness acquisition unit that acquires a responsiveness parameter during the ...

HIGH-PRESSURE FUEL SUPPLY PUMP PROVIDED WITH ELECTROMAGNETIC INTAKE VALVE

An object of the present invention is to prevent generation of wear at a rod collision portion in an electromagnetic intake valve of a high-pressure fuel supply pump by reducing inclinations of the intake valve and a rod. 1. A high-pressure fuel supply pump comprising:an intake valve that has a planar portion;a rod portion that biases the planar portion in a valve-opening direction; anda seat member that is formed at a position parallel to the planar portion and has an intake valve seat on which the intake valve is seated, whereinthe seat member is formed with a guide which guides the rod portion on a side opposite to the intake valve with respect to a contact position between the rod portion and the planar portion.2. The high-pressure fuel supply pump according to claim 1 , whereinthe planar portion of the intake valve and the intake valve seat of the seat member are formed on a substantially identical plane.3. The high-pressure fuel supply pump according to claim 1 , whereinthe planar portion of the intake valve and a central axis of the rod portion are arranged to be orthogonal to each other.4. The high-pressure fuel supply pump according to claim 1 , whereinthe seat member is formed with a fuel passage into which fuel from a low-pressure flow path flows, andthe guide portion is arranged on a side opposite to the intake valve seat with respect to an opening portion of the fuel passage.5. The high-pressure fuel supply pump according to claim 1 , whereinthe seat member is formed with a fuel passage into which fuel from a low-pressure flow path flows, andthe guide portion is entirely arranged on a side opposite to the intake valve seat with respect to an opening portion of the fuel passage.6. The high-pressure fuel supply pump according to claim 1 , whereinthe seat member is formed with a fuel passage into which fuel from a low-pressure flow path flows, andthe intake valve seat is arranged on a pressurizing chamber side with respect to an opening portion of the fuel ...

Diesel fuel pump

A diesel fuel pump includes a cylinder provided to a housing, and a plunger configured to form a cylinder chamber in conjunction with the cylinder by being reciprocably provided to the cylinder. The plunger compresses fuel inside the cylinder chamber when the plunger moves in one direction during a reciprocating motion, and introduces the fuel into the cylinder chamber when the plunger moves in another direction. A ball-type non-return valve includes: a spherical ball; a valve seat having a through-hole provided with a truncated side surface-shaped inner surface; and a compression coil spring provided inside the cylinder chamber, and having one end portion in contact with the ball and another end portion in contact with the cylinder. A value of a winding diameter of the compression coil spring is reduced at the one end portion.

PROTECTION DEVICE FOR LIMITING PUMP CAVITATION IN COMMON RAIL SYSTEM

A pressurized fuel system for an engine includes a fuel pump in a pump protection device structured to drain pressurized fuel from a common rail to provide fuel flow through the fuel pump that limits cavitation. The device includes a valve mechanism having a first valve and a second valve that are movable to an open position and a closed position respectively, in response to valve opening and valve closing rail pressures. The active pressure range of the device may be a medium pressure range. 1. A fuel system for an internal combustion engine comprising:a fuel supply;a common rail;a fuel pump coupled with the fuel supply and structured to pressurize a fuel from the fuel supply for conveying to the common rail;a plurality of fuel injectors coupled with the common rail and structured to inject the fuel into a plurality of cylinders in an internal combustion engine; anda pump protection device structured to drain pressurized fuel from the common rail to provide a fuel flow through the fuel pump that limits cavitation within the fuel pump, the pump protection device including a valve body having an inlet fluidly connected with the common rail, a drain outlet, and a valve mechanism positioned within the valve body fluidly between the inlet and the outlet;the valve mechanism including a first valve member movable between a closed position inhibiting fluid flow through the inlet, and an open position, and a second valve member movable between a closed position inhibiting fluid flow through the outlet, and an open position, and at least one biaser biasing the first valve member and the second valve member toward the closed position and the open position, respectively.2. The fuel system of wherein the first valve member includes an opening hydraulic surface having a first surface area claim 1 , and the second valve member includes a closing hydraulic surface having a second surface area.3. The fuel system of wherein the first surface area is smaller than the second surface ...

HIGH-PRESSURE FUEL PUMP

Disclosed herein is a high-pressure fuel pump. The high-pressure fuel pump includes a housing including a chamber provided to compress fuel supplied thereinto, an inlet flow passage that communicates with the chamber to draw fuel into the chamber through the inlet flow passage, and a discharge flow passage that communicates with the chamber to discharge the fuel out of the chamber through the discharge flow passage. The high-pressure fuel pump further includes a piston disposed in the housing and configured to linearly reciprocate to compress the fuel supplied into the chamber; and a discharge valve disposed in the discharge flow passage of the housing and configured to open when a pressure of fuel stored in the chamber is equal to or greater than a first pressure, the discharge valve including an open-and-close member that makes line contact with an inlet of the discharge valve to close the inlet. 1. A high-pressure fuel pump comprising:a housing including a chamber provided to compress fuel supplied thereinto, an inlet flow passage that communicates with the chamber to draw the fuel into the chamber through the inlet flow passage, and a discharge flow passage that communicates with the chamber to discharge the fuel out of the chamber through the discharge flow passage;a piston disposed in the housing and configured to linearly reciprocate to compress the fuel supplied into the chamber; anda discharge valve disposed in the discharge flow passage of the housing and configured to open when a pressure of the fuel stored in the chamber is equal to or greater than a first pressure, the discharge valve including an open-and-close member that makes line contact with an inlet of the discharge valve to close the inlet.2. The high-pressure fuel pump according to claim 1 , wherein the discharge valve comprises:a valve housing inserted into and coupled to the discharge flow passage, and having the inlet through which the fuel is drawn into the valve housing;the open-and-close ...

Three stage proportional control valve

An energize-to-close solenoid operated spool type inlet control valve for a high pressure fuel pump is variably positionable relative to a sleeve having three inlet feed ports and the inlet check valve member, to implement three stages of pump operation: limp-home, low-pressure flow from the low-pressure feed pump to the common rail, no flow to the common rail, and metered quantity of flow to the common rail. The spool valve includes an axially extending internal passage fluidly connected to a fluid volume at the front end of the spool valve, and a control port at the back end of the spool valve, selectively alignable to fluidly connect the ports. Two springs of different lengths either alone or together, bias the spool valve toward opening of the inlet check valve.

Valve For A High-Pressure Pump For A Motor Vehicle

Some embodiments may include a valve for a pump comprising: a first stop element having a longitudinal axis and a sealing seat; an actuator providing an actuator force along the longitudinal axis; a pin movable relative to the first stop element along the longitudinal axis and movable by the actuator force; a sealing element moved by the pin relative to the valve seat in order to open or close the valve; and a second stop element rigidly fastened to the first stop element providing a stop for the sealing element to limit movement of the sealing element away from the sealing seat along the longitudinal axis. The second stop element is fastened at a defined predetermined distance from the first stop element to define a spacing between the sealing seat and the stop. 1. A valve for a pump , the valve comprising:a first stop element having a longitudinal axis and a sealing seat;an actuator providing an actuator force along the longitudinal axis;a pin movable relative to the first stop element along the longitudinal axis and movable by the actuator force;a sealing element moved by the pin relative to the valve seat in order to open or close the valve; anda second stop element rigidly fastened to the first stop element providing a stop for the sealing element to limit movement of the sealing element away from the sealing seat along the longitudinal axis;wherein the second stop element is fastened at a defined predetermined distance from the first stop element to define a spacing between the sealing seat and the stop.2. The valve as claimed in claim 1 , wherein:the second stop element comprises a sleeve;a side wall of the sleeve is fastened to the first stop element; andthe stop is formed on a base region of the sleeve which runs transversely with respect to the side wall.3. The valve as claimed in claim 1 , wherein the first stop element has a groove in which the second stop element is at least partially arranged.4. The valve as claimed in claim 1 , wherein the sealing ...

HIGH-PRESSURE FUEL PUMP

A high-pressure fuel pump includes a housing including a chamber, an inlet flow passage to draw fuel into the chamber, and a discharge flow passage to discharge fuel out of the chamber. The high-pressure fuel pump further includes a piston disposed in the housing and configured to compress fuel, a sleeve coupled to the housing and configured to support the piston and form a space for storing fuel, a discharge valve disposed in the discharge flow passage and configured to open when a pressure of fuel stored in the chamber is equal to or greater than a first pressure, and a pressure relief valve disposed in a relief flow passage that communicates with the discharge flow passage and the space. The pressure relief valve is configured to open when a pressure of fuel supplied into the relief flow passage is equal to or greater than a second pressure. 1. A high-pressure fuel pump comprising:a housing including a chamber provided to compress fuel supplied thereinto, an inlet flow passage that communicates with the chamber to draw the fuel into the chamber through the inlet flow passage, and a discharge flow passage that communicates with the chamber to discharge the fuel out of the chamber through the discharge flow passage;a piston disposed in the housing and configured to linearly reciprocate to compress the fuel supplied into the chamber;a sleeve coupled to the housing and configured to support the piston and form a space for storing the fuel within the housing;a discharge valve disposed in the discharge flow passage of the housing and configured to open when a pressure of the fuel stored in the chamber is equal to or great than a first pressure; anda pressure relief valve disposed in a relief flow passage which is formed in the housing and communicates with the discharge flow passage and the space, the pressure relief valve being configured to open when a pressure of the fuel supplied into the relief flow passage is equal to or greater than a second pressure.2. The high ...

HIGH PRESSURE PUMP CONTROLLER

When a plunger of a high pressure pump is rising, a high pressure pump controller closes a regulator valve by energizing a solenoid of an electromagnetic actuator of the high pressure pump to discharge fuel into a delivery pipe. Further, this fuel discharge energization is stopped before the plunger reaches top dead center at a pump TDC timing. Further, a fuel pressure of the delivery pipe is detected at the pump TDC timing, and based on that detected value, a time Td from the pump TDC timing until a valve opening timing of the regulator valve is estimated. Once the estimated time Td elapses from the pump TDC timing, the solenoid is reenergized to removed a movement speed of a movable portion in a direction that pushes the regulator valve in an opening direction. 1. A high pressure pump controller for controlling a high pressure pump , comprising:a discharge energizer;an estimator; anda reenergizer, wherein a pump chamber having an inlet and an outlet for fuel,', 'a plunger that reciprocates within the pump chamber,', 'a regulator valve that opens and closes a fuel passage connected to the inlet,', 'a first spring that biases the regulator valve in a closing direction along a movement direction of the regulator valve, the regulator valve configured to close the fuel passage in the closing direction, and', 'an electromagnetic actuator that causes the regulator valve to move to open and close,, 'the high pressure pump includes'} a movable portion biased by a second spring in an opening actuation direction to push the regulator valve in an opening direction, the opening direction being opposite to the closing direction, and', 'a solenoid that, when energized, attracts the movable portion in a direction opposite to the opening actuation direction,, 'the electromagnetic actuator includes'}the outlet is connected to a fuel storage unit which stores fuel to be supplied to an injector,a plunger rise period is defined as when the plunger is rising from bottom dead center to ...

HIGH-PRESSURE PUMP

In a high-pressure pump, a relief valve seating surrounds an opening of a relief valve passage of a valve seat main body in a first space, A relief valve member includes a relief valve main body and a relief valve seat portion. The relief valve main body has a rod shape. The relief valve seat portion is integrated with an end of the relief valve main body so as to be capable of contacting the relief valve seat. The relief valve urging member urges the relief valve member toward the relief valve seat. A support portion includes a support main body that slidably supports an outer wall of the relief valve main body so as to guide a reciprocating movement of the relief valve member in the axial direction. 1. A high-pressure pump comprising:a pump body including a pressurizing chamber that pressurizes a fuel, and a discharge passage through which the fuel pressurized and discharged by the pressurizing chamber flows;a valve seat portion including a relief valve seat;a discharge valve member that is disposed in the discharge passage and allows a flow of the fuel in a direction away from the pressurizing chamber from one side to another of the discharge valve member;a relief valve member that is disposed in the discharge passage between the pressurizing chamber and a downstream of the discharge valve member and allows a flow of the fuel in a direction toward the pressurizing chamber from one side to another of the relief valve member;a relief valve urging member that urges the relief valve member in a direction away from the pressurizing chamber; anda support portion that guides a reciprocating movement of the relief valve member in an axial direction, whereinthe relief valve member includes a relief valve main body having a rod shape, a relief valve seat portion capable of contacting the relief valve seat, and a valve member protrusion portion provided radially outward of the relief valve main body and contacting one end of the relief valve urging member,the support ...

HIGH-PRESSURE FUEL PUMP

A high-pressure fuel pump includes a pump housing, a pressurizing member, a suction valve seat, a suction valve body, and a suction valve chamber. The suction valve seat includes a first projected wall section that is projected to an upper side in a vertical direction. The pump housing includes a second projected wall section that is directed to the upper side in the vertical direction. A height of the lowest position in a portion of the second projected wall section that is projected to the upper side in the vertical direction is higher than a height of the lowest position in a portion of the first projected wall section that is projected to the upper side in the vertical direction. A first initial fuel pool is provided on an downstream side of the second projected wall section and on the upstream side of the suction valve seat. 1. A high-pressure fuel pump comprising:a pump housing including a fuel passage;a pressurizing member operably supported by the pump housing, so as to define a fuel pressurizing chamber for communicating with the fuel passage in the pump housing, the pressurizing member configured to be displaced in a suction operation direction in which fuel is suctioned into the fuel pressurizing chamber and in a discharge operation direction in which the fuel in the fuel pressurizing chamber is discharged;a suction valve seat provided on a suction side of the fuel pressurizing chamber within the fuel passage, the suction valve seat including a first projected wall section that is projected to an upper side in a vertical direction;a suction valve body configured to engage with and disengage from the suction valve seat, so as to switch between a valve opened state in which a suction operation of the fuel into the fuel pressurizing chamber is permitted and a valve closed state in which a backflow of the fuel from the fuel pressurizing chamber to an upstream side of the suction valve seat is prevented; anda suction valve chamber that houses the suction valve ...

Fuel Supply Device

A fuel supply device has a housing and an intake channel section formed in the housing. At least one fuel port opens into the intake channel section. At least one fuel channel is provided and a valve with valve plate is arranged in the fuel channel. The valve has a closed position and an open position. The valve plate contacts a valve seat in the closed position. The valve plate carries out a valve stroke between open position and closed position. At least one annular gap is formed in the fuel channel. A gap width of the at least one annular gap is matched to a length of the valve stroke of the valve plate such that the gap width is not larger than twice a length of the valve stroke. A flow cross section of the annular gap is larger than a flow cross section of the valve. 1. A fuel supply device comprising:a housing;an intake channel section formed in the housing;at least one fuel port that opens into the intake channel section;at least one fuel channel;a valve arranged in the at least one fuel channel;the valve comprising a valve plate, wherein the valve comprises a closed position and an open position, wherein the valve plate contacts a valve seat in the closed position, and wherein the valve plate carries out a valve stroke between the open position and the closed position;at least one annular gap formed in the at least one fuel channel, wherein a gap width of the at least one annular gap is matched to a length of the valve stroke of the valve plate of the valve such that the gap width is not larger than twice a length of the valve stroke, wherein a flow cross section of the annular gap is larger than a flow cross section of the valve.2. The fuel supply device according to claim 1 , wherein the gap width amounts to at most 100% of the length of the valve stroke.3. The fuel supply device according to claim 2 , wherein the gap width amounts to at most 80% of the length of the valve stroke.4. The fuel supply device according to claim 1 , wherein the valve plate is ...

HIGH PRESSURE FUEL PUMP

A high pressure fuel pump is provided with a pumping bore and a pressure relief valve only opening to enable a return flow from the outlet conduit back to the compression chamber when the pressure in the outlet conduit exceeds a predetermined threshold. The pressure relief valve is arranged in an elongated pressure relief valve chamber extending parallel and offset to the pumping bore. 16-. (canceled)7. A high pressure fuel pump for a gasoline direct injection fuel equipment of an internal combustion engine , said high pressure fuel pump comprising:a body provided with a pumping bore extending along a pumping axis and defining, at an end, a compression chamber which volume is cyclically varied by a piston reciprocating in said pumping bore;an inlet conduit controlled by an inlet valve;an outlet conduit controlled by an outlet valve, said outlet valve being normally closed and only opening when the pressure in the compression chamber exceeds a first predetermined threshold, thereby enabling pressurised fuel to be expelled into the outlet conduit; anda pressure relief valve (PRV) normally closed and only opening to enable a return flow from the outlet conduit back to the compression chamber when the pressure in the outlet conduit exceeds a second predetermined threshold superior to the first predetermined threshold, said PRV comprising a resilient valve member and a seat and being arranged in an elongated PRV chamber extending parallel and offset to the pumping bore, said elongated PRV chamber being sealed at an end by a plug member and wherein a body outer dimension of the body transverse to the pumping axis is defined by the addition of a pumping bore diameter of the pumping bore, a PRV chamber diameter of the elongated PRV chamber, and a thickness of a wall separating said pumping bore and said elongated PRV chamber.8. A pump as claimed in claim 7 , wherein said seat is defined in said plug member.9. A pump as claimed in wherein claim 8 , said plug member is ...

HIGH-PRESSURE PUMP

A high-pressure pump has a metering valve and a valve stopper. The stopper has a regulation portion which an end surface of the valve is brought into contact with. An outer diameter of the regulation portion is equal to an outer diameter of the outer peripheral surface of the valve. A cylindrical sleeve is disposed around the regulation portion. When the end surface of the valve is in contact with the regulation portion, the sleeve covers a tapered surface of the valve. 1. A high-pressure pump comprising:a plunger performing a reciprocating movement;a housing defining a pressurization chamber and a first fuel passage for introducing a fuel toward the pressurization chamber;a cylindrical seat body which has a valve seat;a valve which has a seat surface that is integrated in one piece with a disk portion;a stopper which has a surface confronting the valve;an electromagnetic drive portion which generates an electromotive force so as to move the valve in a valve-opening direction or a valve-closing direction,a spring which is disposed between the valve and the stopper so as to bias the valve toward the vale seat, whereinthe valve is located between the electromagnetic drive portion and the pressurization chamber,the second fuel passage is arranged between the valve seat and the pressurization chamber in such a manner as to fluidly connect the seat surface of the valve with the pressurization chamber,the valve and the stopper are configured in such a manner that the valve is able to abut on the stopper at a position radially outside of the spring,the stopper has a cylindrical portion,the stopper is configured to form an accommodation space defined by an inner wall of the cylindrical portion and the valve and configured to be filled with the fuel,the second fuel passage is defined radially outside of the cylindrical portion,the accommodation space is connected with the second fuel passage through a passage, which extends in a direction perpendicular to the valve-opening- ...

Fuel Supply System

A fuel supply system having a low pressure region, a pumping device to deliver fuel from the low pressure region to a high pressure region. In the high pressure region between the pumping device and injectors there is a pressure storage system that is permanently under high pressure. The pressure storage system has a plurality of distributor units each with at least three connections connected in series. A respective injector connection of each distributor unit is connected to at least one injector each via a high pressure line that is under high pressure at times dependent on the injection cycle. Each distributor unit of the pressure storage system is assigned an individual leakage detection device. Each distributor unit is assigned a non-return valve, which allows a leakage flow starting out from the respective distributor unit in the direction of the pumping device. 1. A fuel supply system configured as a common rail fuel supply system of an internal combustion engine comprising:a low pressure region;a high pressure region;a pumping device configured to deliver fuel from the low pressure region to the high pressure region;a plurality of high pressure lines that are permanently under high pressure;a pressure storage system that is permanently under high pressure arranged in the high pressure region between the pumping device and injectors assigned to cylinders of the internal combustion engine; a fuel feed connection;', 'a fuel drain connection; and', 'a injector connection,', 'wherein:', 'a fuel feed connection of a first distributor unit is connected to the pumping device via a respective high pressure line,', 'a respective fuel drain connection of the first distributor unit up to a penultimate distributor unit is connected to the fuel feed connection of the respective distributor unit located directly downstream via a respective high pressure line,', 'a fuel drain connection of a last distributor unit is closed, and', 'a respective injector connection of each ...

AIR RECIRCULATION PREVENTION CHECK VALVE FOR THE FUEL DRAIN MANIFOLD

A manifold configured to inhibit air recirculation in an engine fueling system, the manifold comprising: a housing including an internal chamber in communication with a high pressure pump (“HPP”) port configured to receive drain fuel from a HPP; a drain port configured to return fuel to a fuel tank; an air bleed port configured to receive air bled from the fueling system; and a check valve positioned within the internal chamber, the check valve configured to inhibit air from flowing from the air bleed port to the HPP port, thereby inhibiting air recirculation into the engine fueling system. 1. A manifold configured to inhibit air recirculation in an engine fueling system , the manifold comprising:a housing including an internal chamber in fluid communication with a high-pressure pump (“HPP”) port configured to receive drain fuel from a HPP;a drain port configured to return fuel to a fuel tank;an air bleed port configured to receive air bled from the engine fueling system; anda check valve positioned within the internal chamber, the check valve configured to inhibit air from flowing from the air bleed port to the HPP port, thereby inhibiting air recirculation into the engine fueling system.2. The manifold of claim 1 , wherein the housing further includes a rail port configured to receive drain fuel from a fuel accumulator claim 1 , and an injector port configured to receive drain fuel from at least one fuel injector claim 1 , the HPP port claim 1 , the rail port claim 1 , the injector port and the drain port being in fluid communication with the internal chamber.3. The manifold of claim 1 , wherein the housing further includes a recirculation passage in fluid communication with the internal chamber to receive the drain fuel.4. The manifold of claim 3 , wherein the housing includes a drain fuel housing and a thermal recirculation valve housing extending from the drain fuel housing claim 3 , the internal chamber being disposed in the drain fuel housing claim 3 , the ...

FUEL PUMP AND OUTLET VALVE THEREOF

An outlet valve includes an outlet valve housing with an outlet valve bore including an outlet valve seating surface. The outlet valve also includes an outlet valve member which moves within the outlet valve bore second portion between a closed position and an open position. A surface of the outlet valve bore guides the outlet valve member during movement between the closed position and the open position. The surface of the outlet valve bore and the outlet valve seating surface are provided on a continuous piece of material of the outlet valve housing. An outlet valve spring biases the outlet valve member toward the closed position and a retainer is fixed to the outlet valve housing which grounds the outlet valve spring to the outlet valve housing. 1. An outlet valve for controlling outlet fuel flow of a fuel pump , said outlet valve comprising:an outlet valve housing extending from a first end to a second end along an outlet valve axis, said outlet valve housing having an outlet valve bore having an outlet valve bore first portion which extends toward said second end and said outlet valve bore also having an outlet valve bore second portion which extends from said second end to said outlet valve bore first portion such that an outlet valve seating surface is located within said outlet valve bore;an outlet valve member which moves within said outlet valve bore second portion between 1) a closed position in which said outlet valve member is seated with said outlet valve seating surface which prevents fluid communication from said outlet valve bore first portion to said outlet valve bore second portion and 2) an open position in which said outlet valve member is unseated with said outlet valve seating surface which permits fluid communication from said outlet valve bore first portion to said outlet valve bore second portion, wherein a surface of said outlet valve bore second portion guides said outlet valve member during movement between said closed position and said ...

METHOD FOR COATING A MECHANICALLY HIGHLY LOADED SURFACE OF A COMPONENT, AND COATED COMPONENT ITSELF

The invention relates to a method for coating a mechanically highly loaded surface () of a component () consisting of a hardened steel with a nitrogen and/or carbon component with an adherent or functional coating () for surface treatment, wherein a metallic binding material () is introduced into the surface () prior to the application of the adherent or functional coating () to create a graduated diffusion barrier zone () conforming to the surface with a proportion of metal nitride and/or metal carbide increasing towards the surface (). 121452324. A process for coating a mechanically highly stressed surface () of a component () comprising a hardened steel having a proportion of nitrogen and/or carbon with a bonding layer or functional layer () for surface upgrading , characterized in that a metallic binder material () is introduced into the surface () in order to create a gradated diffusion barrier zone () which conforms to the surface and has a proportion of metal nitride and/or metal carbide which increases in the direction of the surface () before application of the bonding layer or functional layer ().25. The process as claimed in claim 1 , characterized in that the introduction of the metallic binder material () is carried out by implantation or inward diffusion.35. The process as claimed in claim 2 , characterized in that the introduction of the metallic binder material () is in the case of inward diffusion carried out at a process temperature of from 200 to 500° C.45. The process as claimed in claim 1 , characterized in that the introduction of the metallic binder material () is carried out with a penetration depth (T) of up to 200 nanometers.553. A component which has been coated by the process as claimed in claim 1 , characterized in that the metallic binder material () for producing the diffusion barrier zone () is selected from a binder metal group comprising chromium claim 1 , manganese claim 1 , molybdenum claim 1 , tungsten.64. The component as ...

High Speed Valve

Valve including a valve body having a drain hole, a valve seat including an outlet union from which fluid flows out of the valve, a cup coupled to the valve body and biased against the valve seat, an input union, and a control valve arranged partly inside the valve seat. The control valve defines a compartment and including an actuator, a permanent magnet and first and second electromagnets. The actuator includes a slide arranged in the compartment and that closes the drain hole when in a first position and is spaced apart from the drain hole when in a second position, and an armature. Providing current to the first electromagnet cause the slide to move to the second position separated from the drain hole and causing movement of the cup apart from the valve seat and thus flow of fluid from the input union to the outlet union. 1. A valve , comprising:a valve housing including an input portion through which fluid flows into said valve housing, a valve seat including an outlet portion through which fluid flows out of said valve housing, at least one relief channel, and a drain hole;a cup biased against said valve seat and arranged in said valve housing to define a first cavity inside said cup in flow communication with said at least one relief channel and a second cavity adjacent and external of said cup, a third cavity being defined by said input portion, said valve housing including at least one supply channel between said second cavity and said third cavity; anda control valve arranged partly inside said valve housing, said control valve defining a compartment and including an actuator, a permanent magnet and first and second electromagnets, said compartment being in flow communication with said at least one relief channel, said actuator including a slide arranged in said compartment and that closes said drain hole when in a first position and is spaced apart from said drain hole when in a second position, and an armature;the valve being configured to have a closed ...

Fuel pump

Provided is a fuel pump comprising: a pump body; a plunger reciprocatably displaceable with respect to the pump body; and a plurality of valve elements inclusive of a suction valve to allow the fuel to be sucked into the fuel pressurizing chamber and a discharge valve to allow the fuel to be discharged out of the fuel pressurizing chamber, in which the pump body comprises a tubular valve retention member to retain the plurality of valve elements, a cylinder member to slidably retain the plunger, and an outer shell member having an inner wall surface facing an outer surface of the valve retention member, the inner wall surface and the outer surface of the valve retention member collectively forming a suction gallery chamber.

HIGH-PRESSURE PUMP

A high-pressure pump has a metering valve and a valve stopper. The stopper has a regulation portion which an end surface of the valve is brought into contact with. An outer diameter of the regulation portion is equal to an outer diameter of the outer peripheral surface of the valve. A cylindrical sleeve is disposed around the regulation portion. When the end surface of the valve is in contact with the regulation portion, the sleeve covers a tapered surface of the valve. 1. (canceled)2. (canceled)3. (canceled)3. (canceled)4. (canceled)5. A high-pressure pump comprising:a plunger performing a reciprocating movement;a housing defining a pressurization chamber and a first fuel passage for introducing a fuel toward the pressurization chamber;a cylindrical seat body which has a valve seat;a valve which has a seat surface that is integrated in one piece with a disk portion and a flat end surface;a stopper which has a surface confronting the valve;an electromagnetic drive portion which generates an electromotive force so as to move the valve in a valve-opening-and-closing direction,a spring which is disposed between the valve and the stopper so as to bias the valve toward the vale seat, whereinthe valve is located between the electromagnetic drive portion and the pressurization chamber,a second fuel passage is arranged between the valve seat and the pressurization chamber in such a manner as to fluidly connect the seat surface of the valve with the pressurization chamber,the valve and the stopper are configured in such a manner that the valve is able to abut on the stopper at a position radially outside of the spring,the stopper has a cylindrical portion,the stopper is configured to form an accommodation space defined by an inner wall of the cylindrical portion and the valve and configured to be filled with fuel,the second fuel passage is defined radially outside of the cylindrical portion,the accommodation space is connected with the second fuel passage through a passage, ...

FUEL SUPPLY PUMP AND METHOD FOR MANUFACTURING FUEL SUPPLY PUMP

An object of the invention is to provide a fuel supply pump that can simultaneously prevent cavitation erosion in a relief valve seat portion at the time of increasing the pressure and reduce a maximum pressure when releasing an abnormally high pressure. Therefore, in the fuel supply pump, a relief valve mechanism includes a seat portion and a relief valve seated on the seat portion, and sets a set discharge pressure to 30 MPa or more. A seat angle of the seat portion is formed to be 40° to 50°, and a set valve opening pressure of the relief valve mechanism is set to 2 MPa or more than the set discharge pressure. 1. A fuel supply pump , comprising:a relief valve mechanism that includes a seat portion and a relief valve seated on the seat portion, and sets a set discharge pressure to 30 MPa or more,wherein a seat angle of the seat portion is formed to be 40° to 50°, and a set valve opening pressure of the relief valve mechanism is set to 2 MPa or larger than the set discharge pressure.2. The fuel supply pump according to claim 1 , comprisinga pressurizing chamber that pressurizes fuel,wherein the relief valve mechanism is configured to open the relief valve when a pressure difference between a pressure on a discharge side of the pressurizing chamber and a pressure of the pressurizing chamber becomes larger than the set valve opening pressure, andwherein the set discharge pressure is set as a maximum pressure value on the discharge side of the pressurizing chamber in a suction stroke.3. The fuel supply pump according to claim 1 , comprisinga pressurizing chamber that pressurizes fuel,wherein the relief valve mechanism is configured to open the relief valve when a pressure difference between a pressure on a discharge side of the pressurizing chamber and a pressure on a suction side of the pressurizing chamber becomes larger than the set valve opening pressure, andwherein the set discharge pressure is set as a maximum pressure value on the discharge side of the ...

High-Pressure Fuel Pump

An object is to suppress cavitation generated at a distal end portion of a seat face when a valve body and a seat portion collide with each other. In a relief valve of a fuel pump, an intersection between the seat face and a flow channel hole is formed at a position more distant than the seat portion formed of the valve body in a valve closing state and the seat face in order to suppress generation of cavitation bubbles when the valve body improves and releases high-pressure fuel. 1. A high-pressure fuel pump comprising:a pressurizing chamber to pressurize fuel;a discharge valve disposed on a downstream side of the pressurizing chamber; anda relief valve mechanism that causes fuel in a discharge path on the downstream side of the discharge valve to return to the pressurizing chamber or a low-pressure path,wherein the relief valve mechanism comprises: a relief path formed to be connected to the discharge path; a relief seat face connected to the relief path and formed to be enlarged toward the pressurizing chamber or the low-pressure path; and a relief valve body positioned to be closer to the pressurizing chamber side or the low-pressure path side than the relief seat face and seated on the relief seat face, andan intersection between the relief path and the relief seat face is positioned closer to the discharge path side than an end portion of the relief valve body on the discharge path side.2. A high-pressure fuel pump comprising:a pressurizing chamber to pressurize fuel;a discharge valve disposed on a downstream side of the pressurizing chamber; anda relief valve mechanism that causes fuel in a discharge path on the downstream side of the discharge valve to return to the pressurizing chamber or a low-pressure path,wherein the relief valve mechanism comprises: a relief path formed to be connected to the discharge path; a relief seat face connected to the relief path and formed to be enlarged toward the pressurizing chamber or the low-pressure path; and a relief ...

High-Pressure Fuel Supply Pump

It is an object of the present invention to provide a high-pressure fuel supply pump having a pump body capable of improving corrosion resistance and weldability and being manufacturable by forging. Therefore, in the high-pressure fuel supply pump having a metal pump body forming a pressurizing chamber, the pump body is made of a steel material containing 12% to 18% of Cr and 3% to 7% of Ni, and the pump body has a forging surface on a part of the outer peripheral surface. 1. A high-pressure fuel supply pump , comprising a metal pump body forming a pressurizing chamber ,wherein the pump body is made of a steel material containing 12% to 18% of Cr and 3% to 7% of Ni, and the pump body has a forging surface on a part of its outer peripheral surface.2. The high-pressure fuel supply pump according to claim 1 ,wherein the pump body is made of a steel material containing 0.5% to 3% of Mo.3. The high-pressure fuel supply pump according to claim 1 ,wherein the pump body is made of a steel material containing 2% or less of Mn.4. The high-pressure fuel supply pump according to claim 1 ,wherein the pump body is made of a steel material containing 0.08% or less of C.5. The high-pressure fuel supply pump according to claim 1 ,wherein the pump body is made of a steel material containing 0.01% to 0.1% of N.6. The high-pressure fuel supply pump according to claim 1 ,wherein the pump body integrally molds flanges to be attached to an engine with the same member.7. The high-pressure fuel supply pump according to claim 1 , wherein the pump body integrally molds an engine checking and verifying portion in which a high-pressure fuel supply pump is inserted into an engine with the same member.8. The high-pressure fuel supply pump according to claim 1 , wherein the pump body integrally molds a discharge joint with the same member.9. The high-pressure fuel supply pump according to claim 1 , wherein the pump body integrally molds a suction joint with the same member.10. The high-pressure ...

PUMP UNIT FOR FEEDING FUEL, PREFERABLY DIESEL FUEL, TO AN INTERNAL COMBUSTION ENGINE

The invention relates to a pump unit for feeding fuel, preferably diesel fuel, to an internal combustion engine, comprising at least one cylinder (), a piston () which is displaceably arranged in the cylinder (), and a pressure valve () for selectively controlling the supply of fuel to the internal combustion engine, wherein the pressure valve () has a closure part () provided with a cavity () that opens to the outside on an end surface () facing the piston () of the closure part (). 149144915141615141429143030384651814434852153038465144495343485214. A pump unit for feeding fuel to an internal combustion engine , the pump unit comprising a pump body ( , ) , at least one cylinder () formed in the pump body ( , ) , a piston () arranged displaceably in the cylinder () , an actuating device () for moving the piston () with an intake stroke for intake of the fuel into the cylinder () , and with a compression stroke for compression of the fuel contained in the cylinder () , a suction valve () for selectively controlling feeding of the fuel into the cylinder () , and a pressure valve () for selectively controlling feeding of the fuel to the internal combustion engine , wherein the pressure valve () comprises a closure part ( , , ) which is fitted in a manner coaxial with a longitudinal axis () of the cylinder () , which is axially delimited by an end surface ( , , ) facing the piston () and which is movable between an open position and a closed position of the pressure valve () , characterized in that the closure part ( , , ) has a cavity ( , , ) which opens outwardly at the end surface ( , , ) and which communicates with the cylinder ().24449538. The pump unit as claimed in claim 1 , wherein the cavity ( claim 1 , claim 1 , ) extends around the longitudinal axis ().343484548844494548. The pump unit as claimed in claim 1 , wherein the end surface ( claim 1 , ) comprises a central portion ( claim 1 , ) which runs substantially perpendicular to the longitudinal axis () claim ...

Method And Device For Controlling A Valve

A method is disclosed for controlling a valve having a spring with a spring force, an actuator with an actuator force opposing the spring force, and a pin that is actuated by the actuator, a seal element that can be coupled with the pin, and a seal seat, the valve being closed when the seal element sits against the seal seat. The method includes determining an expected natural opening time when the seal element is lifted off the seal seat based on a pressure difference in front and behind the valve, impressing a specified current on the actuator at a point in time within a specified interval prior to the natural opening time, the seal element sitting against the seal seat at the point in time such that the pin contacts the seal element and the actuator force matches the spring force, which is reduced by a specified value. 1. A method for controlling a valve having a spring with a spring force , an actuator with an actuator force that counteracts the spring force , a pin actuated by the actuator , a sealing element that configured to be coupled to the pin , and a sealing seat , wherein the valve is closed when the sealing element bears against the sealing seat , the method comprising:determining an expected natural opening time at which the sealing element lifts from the sealing seat based on a pressure difference upstream and downstream of the valve, andapplying an electrical current with a predefined value to the actuator at a time, within a predefined interval before the natural opening time, at which the sealing element bears against the sealing seat, such that the pin makes contact with the sealing element and the actuator force corresponds to the spring force reduced by a predefined value.2. The method of claim 1 , comprising: 'applying the current to the actuator with a predefined non-constant profile proceeding from a starting value of the current, at which the pin is in a position in which it permits the closure of the valve,', 'in a first operating ...

High-pressure pump

In a high-pressure pump, a relief valve seat surrounds an opening of a relief valve passage of a valve seat main body in a first space. A relief valve member includes a relief valve main body and a relief valve seat portion. The relief valve main body has a rod shape. The relief valve seat portion is integrated with an end of the relief valve main body so as to be capable of contacting the relief valve seat. The relief valve member is provided in the first space so as to be reciprocable in an axial direction. A relief valve urging member urges the relief valve member toward the relief valve seat. A support portion includes a support main body that slidably supports an outer wall of the relief valve main body so as to guide a reciprocating movement of the relief valve member in the axial direction.

High-Pressure Fuel Pump and Method for Producing Same

Provide is a high-pressure fuel pump capable of improving the degree of freedom of layout of members to be attached to a pump body and a producing method thereof. Therefore, the high-pressure fuel pump includes the suction joint that sucks fuel, the pump body formed with the pressurizing chamber that pressurizes the fuel sucked from the suction joint, and the discharge joint that discharges the fuel pressurized in the pressurizing chamber. The pump body is formed so that at least a part of the side surface portion thereof becomes a cylindrical portion or a polygonal shape portion. At least one of the discharge joint and the suction joint may be fixed on the inner peripheral side with respect to the outermost peripheral portion of the cylindrical portion or the polygonal shape portion of the side surface portion. 1. A high-pressure fuel pump comprising:a suction joint that sucks fuel;a pump body formed with a pressurizing chamber that pressurizes the fuel sucked from the suction joint; anda discharge joint that discharges the fuel pressurized in the pressurizing chamber,wherein the pump body is formed such that at least a part of a side surface portion is a cylindrical portion or a polygonal shape portion, and at least one of the discharge joint and the suction joint is fixed on an inner peripheral side with respect to an outermost peripheral portion of the cylindrical portion or the polygonal shape portion of the side surface portion.2. A high-pressure fuel pump comprising:a suction joint that sucks fuel;a pump body formed with a pressurizing chamber that pressurizes the fuel sucked from the suction joint;a discharge joint that discharges the fuel pressurized in the pressurizing chamber; andan electromagnetic suction valve mechanism,wherein the pump body is formed such that at least a part of a side surface portion is a cylindrical portion or a polygonal shape portion, and at least one of the discharge joint, the suction joint, and the electromagnetic suction valve ...

METHOD FOR MODIFYING VALVE ASSEMBLY

A method of modifying an existing valve assembly has the step of placing a supplemental sleeve within a housing. The housing has a housing inlet window and a housing outlet window, and the supplemental sleeve has a sleeve inlet window and a sleeve outlet window. The method includes the step of placing an existing piston/sleeve set within the supplemental sleeve. A spool valve is also disclosed. 1. A method of modifying an existing valve assembly , comprising the steps of:(a) placing a supplemental sleeve within a housing bore, wherein the housing has a housing inlet window and a housing outlet window, and said supplemental sleeve has a supplemental sleeve inlet window and supplemental sleeve outlet window; and(b) placing an existing valve assembly, having an existing sleeve within said supplemental sleeve, and a piston having an opening for selectively communicating the housing inlet window via the supplemental sleeve, and said existing sleeve inlet window to said existing sleeve outlet window and then said supplemental sleeve outlet window and said housing outlet window, and said piston being moveable along an axial direction.2. The method as set forth in claim 1 , wherein said valve is a pressure regulating valve claim 1 , having a spring biasing said piston in one direction and a fluid pressure selectively biasing said piston in a direction opposed to said spring.3. The method as set forth in claim 2 , wherein said existing valve assembly having an existing flow volume and pressure claim 2 , and said supplemental sleeve being designed to change at least one of said flow volume and pressure.4. The method as set forth in claim 1 , wherein said existing valve assembly having an existing flow volume and pressure claim 1 , and said supplemental sleeve being designed to change at least one of said flow volume and pressure.5. The method as set forth in claim 4 , wherein at least one of said supplemental sleeve inlet window and supplemental sleeve outlet window being of ...

High-Pressure Fuel Pump

Provided is a high-pressure fuel pump that ensures oil tightness even at high fuel pressure and has a small and lightweight inexpensive discharge valve structure. Therefore, a high-pressure fuel pump according to the present invention includes: a discharge valve arranged on a discharge side of a pressurizing chamber; a discharge valve seat on which the discharge valve is seated; and a facing member configured independently as a separate member from the discharge valve seat and located on an opposite side of the discharge valve seat with the discharge valve interposed therebetween, in which a stroke direction regulating portion that regulates displacement of the discharge valve in a stroke direction is formed on a tapered surface of the facing member. 1. A high-pressure fuel pump comprising:a discharge valve arranged on a discharge side of a pressurizing chamber;a discharge valve seat on which the discharge valve is seated; anda facing member configured independently as a separate member from the discharge valve seat and located on an opposite side of the discharge valve seat with the discharge valve interposed therebetween,wherein a stroke direction regulating portion that regulates displacement of the discharge valve in a stroke direction is formed on a tapered surface of the facing member.2. The high-pressure fuel pump according to claim 1 , wherein the discharge valve is configured by a ball valve.3. The high-pressure fuel pump according to claim 2 , further comprising a discharge valve chamber in which a discharge valve mechanism including the discharge valve and the discharge valve seat is arranged claim 2 ,wherein the facing member is configured by a plug member (plug) that shields the discharge valve chamber from outside.4. The high-pressure fuel pump according to claim 1 , further comprising a discharge valve chamber in which a discharge valve mechanism including the discharge valve and the discharge valve seat is arranged claim 1 ,wherein the facing member ...

INTERNAL COMBUSTION ENGINE FUEL, PREFERABLY DIESEL FUEL, FEED PUMP ASSEMBLY

Internal combustion engine fuel, preferably diesel fuel, feed pump assembly, the pump assembly () comprising a pump body (); at least one cylinder () formed in the pump body () and extending along an axis (A); a seat () formed in the pump body (), at one end of the cylinder (); an intake valve () for selectively controlling fuel feed into the cylinder (), which is housed inside the seat () and in turn comprises a valve body (); and an annular seal () extending around the axis (A) and fitted inside the seat () between the valve body () and the pump body (); the pump assembly () being characterized in that the valve body () is positioned contacting the annular seal () along a contact surface () of the valve body () and close to a surface portion adjacent to a radially inner peripheral edge () of the seal (); the valve body () having an annular step () along another surface portion adjacent to a radially outer peripheral edge () of the seal (). 1126221226186122526212252125264525462625485226. An internal combustion engine fuel , feed pump assembly , the pump assembly () comprising a pump body (); at least one cylinder () formed in the pump body () and extending along an axis (A); a seat () formed in the pump body () , at one end of the cylinder (); an intake valve () for selectively controlling fuel feed into the cylinder () , wherein the intake valve is housed inside the seat () and in turn comprises a valve body (); and an annular seal () extending around the axis (A) and fitted inside the seat () between the valve body () and the pump body (); the pump assembly () being characterized in that the valve body () is positioned contacting the annular seal () along a contact surface () of the valve body () and close to a surface portion adjacent to a radially inner peripheral edge () of the seal (); the valve body () having an annular step () along another surface portion adjacent to a radially outer peripheral edge () of the seal ().248502626. A fuel feed pump assembly ...

CONTROL DEVICE FOR VEHICLE

A control device for a vehicle includes a low-pressure fuel sensor that detects a pressure of fuel stored in a low-pressure delivery pipe, and a control device that controls a feed pump based on a detected value from the low-pressure fuel sensor. The control device causes a relief valve to be opened when variation in power required in an engine continues to remain within a prescribed range for a prescribed period. With this structure, a control device for a vehicle can be provided which allows the relief valve to be opened with reduced variation in air-fuel ratio. 1. A control device for a vehicle equipped with an internal combustion engine , said internal combustion engine including:a port injection valve that injects fuel into an intake passage;a fuel tank that stores the fuel to be injected from said port injection valve;a feed pump that sucks the fuel from said fuel tank and supplies the fuel to said port injection valve; anda relief valve that is provided along a path from said feed pump to said port injection valve to return the fuel to said fuel tank,said control device comprising:a fuel pressure sensor that detects a pressure of the fuel supplied to said port injection valve; anda control unit that controls said feed pump based on a detected value from said fuel pressure sensor,said control unit causing said relief valve to be opened when variation in power required in said internal combustion engine continues to remain within a prescribed range for a prescribed period.2. The control device for a vehicle according to claim 1 , whereinsaid vehicle is further equipped with a battery and a motor that receives electric power from said battery to drive the vehicle, andsaid control unit, during the execution of opening of said relief valve, determines a required charge/discharge amount for said battery such that the variation in the power required in said internal combustion engine is restricted.3. The control device for a vehicle according to claim 2 , ...

PLUNGER APPARATUS FOR HIGH PRESSURE PUMP

A plunger apparatus for a high pressure pump includes a plunger having a quadrangular cross section and reciprocating in an internal passage provided in a housing to deliver a low pressure fluid to a compression chamber. A guide is connected to the plunger to guide the plunger when the plunger reciprocates. 1. A plunger apparatus for a high pressure pump , comprising:a plunger having a quadrangular cross section and reciprocating in an internal passage provided in a housing to deliver a low pressure fluid to a compression chamber; anda guide connected to the plunger to guide the plunger when the plunger reciprocates.2. The plunger apparatus of claim 1 , wherein the plunger has a square pillar shape.3. The plunger apparatus of claim 1 , wherein an inner peripheral surface of the internal passage has a circular shape claim 1 , the plunger has rounded corners which correspond to the inner peripheral surface of the internal passage.4. The plunger apparatus of claim 1 , wherein the plunger has a through hole at the center thereof in a reciprocating direction claim 1 , and the guide penetrates through the through hole to guide the plunger when the plunger reciprocates linearly.5. The plunger apparatus of claim 1 , wherein a space is formed between an outer peripheral surface of the plunger and the internal passage and the fluid moves through the space part.6. The plunger apparatus of claim 1 , wherein the plunger reciprocates in the internal passage of the housing by a magnetic field of a solenoid and opens and closes a valve to deliver the low pressure fuel to the compression chamber. The present application claims the benefit of priority to Korean Patent Application No. 10-2014-0165150, filed Nov. 25, 2014, the entire contents of which is incorporated herein for all purposes by this reference.The present disclosure relates to a plunger apparatus for a high pressure pump, and more particularly, to a plunger apparatus for a high pressure pump capable of preventing a ...

Pump Arrangement And System For A Motor Vehicle

A pump arrangement for a motor vehicle includes a high pressure pump for delivering a fluid, which pump includes a fluid inlet, a fluid outlet, and a pressure chamber arranged hydraulically between the fluid inlet and the fluid outlet, a first pressure limiting valve having an inlet side coupled to the fluid outlet of the high pressure pump, and a second pressure limiting valve, wherein the two pressure limiting valves are connected hydraulically in parallel. Each pressure limiting valves has an opening pressure, wherein the opening pressure of the first pressure limiting valve is greater than the opening pressure of the second pressure limiting valve, and the opening pressure of the second pressure limiting valve is predefined based on an injector hydraulically coupled to the pump arrangement. 1. A pump arrangement for a motor vehicle , having:a high-pressure pump configured to deliver a fluid and comprising a fluid inlet, a fluid outlet, and a pressure chamber arranged hydraulically between the fluid inlet and the fluid outlet,a first pressure limiting valve having an inlet side coupled to the fluid outlet of the high-pressure pump,a second pressure limiting valve,wherein the two pressure limiting valves are connected hydraulically in parallel,wherein each of the two pressure limiting valves has an opening pressure,wherein a value of the opening pressure of the first pressure limiting valve is greater than a value of the opening pressure of the second pressure limiting valve, andwherein the value of the opening pressure of the second pressure limiting valve is predetermined based on a characteristic of an injector configured for hydraulic coupling to the pump arrangement.2. The pump arrangement of claim 1 , wherein the first pressure limiting valve includes an outlet side coupled hydraulically to the fluid inlet of the high-pressure pump.3. The pump arrangement of claim 1 , wherein the second pressure limiting valve includes an outlet side coupled hydraulically to ...

SYSTEM AND METHOD FOR FUEL INJECTOR ON-TIME CALCULATION USING FUEL SYSTEM PRESSURE PREDICTION

The disclosure provides a system and method to calculate an actual on-time of a fuel injector. The system may include one or more modules located in a control system. The control system uses information available before the fuel injection signal is transmitted to the fuel injector to model and predict a pressure profile in a fuel system that provides high-pressure fuel to the fuel injector, and uses that information along with a fueling command to calculate an actual on-time for the fuel injector. 1. A fuel assembly for an engine , comprising:a fuel accumulator;at least one fuel injector fluidly coupled to the fuel accumulator, the fuel injector being configured to move between an open position permitting fuel to flow from the fuel injector and a closed position inhibiting fuel flow from the injector, each movement between the open and closed positions defining a fuel injection cycle, and the fuel injector being configured for a plurality of fuel injection cycles; anda control system having a controller operably coupled to the fuel injector, the controller being configured to receive at least one parameter of the fuel assembly, wherein before each of the fuel injection cycles, the controller is configured to adjust an amount of time the fuel injector remains in the open position during each of the fuel injection cycles in response to the parameter.2. The fuel assembly of claim 1 , wherein the control system includes at least one module for predicting a pressure profile of the fuel assembly.3. The fuel assembly of claim 2 , further comprising a fuel pump claim 2 , a fuel pump sensor operably coupled to the fuel pump claim 2 , and a fuel accumulator sensor operably coupled to the fuel accumulator claim 2 , and the at least one module is configured to receive signals from the fuel pump sensor and the fuel accumulator sensor to predict the pressure profile of the fuel assembly.4. The fuel assembly of claim 1 , wherein the at least one parameter includes at least one of ...

HIGH-PRESSURE PUMP

A high-pressure pump has a metering valve and a valve stopper. The stopper has a regulation portion which an end surface of the valve is brought into contact with. An outer diameter of the regulation portion is equal to an outer diameter of the outer peripheral surface of the valve. A cylindrical sleeve is disposed around the regulation portion. When the end surface of the valve is in contact with the regulation portion, the sleeve covers a tapered surface of the valve. 1. A high-pressure pump comprising:a plunger performing a reciprocating movement;a housing defining a pressurization chamber and a fuel passage for introducing a fuel toward the pressurization chamber;a valve body which is disposed in the fuel passage and has a valve seat confronting the pressurization chamber;a valve which seats on the valve seat to intercept a fuel flow in the fuel passage and unseats from the valve seat to permit the fuel flow in the fuel passage;a stopper which has a cylindrical portion and a surface confronting the valve;an electromagnetic drive portion which is located at an opposite side of the pressurization chamber with respect to the valve, and generates an electromotive force so as to move the valve in a valve-opening direction or a valve-closing direction, anda substantially annular space which is defined around the cylindrical portion, through which the fuel flows from the pressurization chamber toward the valve.2. A high-pressure pump according to claim 1 , further comprising:a spring which is arranged between the valve and the stopper so as to biases the valve in a valve-close direction.3. A high-pressure pump according to claim 1 , whereinthe cylindrical portion has an outer diameter which is larger than that of an end portion of the valve confronting the stopper.4. A high-pressure pump according to claim 1 , whereinthe stopper is fixed on an inner wall of the fuel passage.5. A high-pressure pump according to claim 4 , whereinthe stopper is fixed on an inner wall of ...

Fuel injection control device

A fuel injection control device has a conduction time calculation unit, a setting unit, a conduction control unit, a detection unit, an estimation unit, and a changing unit. The conduction time calculation unit calculates a conduction time of an electric actuator corresponding to a requested injection quantity during partial lift injection. The setting unit sets a command conduction time. The conduction control unit energizes an electric actuator on the basis of a command conduction time set by the setting unit. The detection unit detects a physical quantity having a correlation with an actual injection quantity during partial lift injection. The estimation unit estimates an actual injection quantity on the basis of a detection result of the detection unit. The changing unit changes a lower limit time on the basis of a deviation between an estimated actual injection quantity and a requested injection quantity.

HIGH PRESSURE PUMP

A housing-includes a pressurizing chamber. A plunger is moved to increase and decrease a volume of the pressurizing chamber, so that the plunger can pressurize the fuel in the pressurizing chamber. A fuel chamber forming portion is placed on a radially outer side of the plunger and forms a fuel chamber that is communicated with the pressurizing chamber. A pulsation damper is placed in an inside of the fuel chamber and is operable to reduce pressure pulsation of the fuel in the fuel chamber. Fixable portions are placed on a radially outer side of the plunger while each of the fixable portions includes a receiving through-hole. The fixable portions are fixed to an engine with bolts, which are provided to correspond with the receiving through-holes, respectively. The fuel chamber forming portion is displaced from axes of the receiving through-holes. 1. A high pressure pump configured to be installed to an internal combustion engine to pressurize , discharge and supply fuel to the internal combustion engine , the high pressure pump comprising:a housing that includes a pressurizing chamber;a plunger that is movable in such a manner that the plunger increases and decreases a volume of the pressurizing chamber upon movement of the plunger, and thereby the plunger is operable to pressurize the fuel in the pressurizing chamber;a fuel chamber forming portion that is placed on a radially outer side of the plunger and forms a fuel chamber that is communicated with the pressurizing chamber;a pulsation damper that is placed in an inside of the fuel chamber and is operable to reduce pressure pulsation of the fuel in the fuel chamber;a discharge portion that discharges the fuel, which is pressurized in the pressurizing chamber; anda fixable portion that is placed on the radially outer side of the plunger and includes a receiving through-hole while the fixable portion is configured to be fixed to the internal combustion engine with a fixing member that is formed to correspond with ...

FUEL PUMP

A fuel pump includes a mechanical regulating valve arranged in a pump body which modulates the pressure in a high pressure space so that the pressure matches the engine demand. Modulation by the regulating valve requires adjustment of the inlet fuel quantity, adjustment of the volume of the high pressure space, and control of a return fluid communication enabling fuel to exit the high pressure reservoir. 118-. (canceled)19. A self-regulated fuel pump assembly of a fuel injection system of an internal combustion engine , the fuel pump assembly being adapted to be arranged between a low pressure tank and a high pressure reservoir , the fuel pump assembly comprising:a pump body defining an inlet fluid communication controlled by an inlet valve for enabling an inlet fuel quantity to enter a compression chamber;a piston which varies the volume of said compression chamber and pressurizes the fuel, wherein pressurized fuel is expelled and delivered into a high pressure space, comprising the high pressure reservoir, via an outlet fluid communication controlled by an outlet valve; anda mechanical regulating valve arranged in the pump body which modulates the pressure in the high pressure space so that the pressure matches engine demand, modulation of the pressure in the high pressure space by the mechanical regulating valve requiring adjustment of the inlet fuel quantity, adjustment of the volume of the high pressure space wherein is stored the pressurized fuel and, control of a return fluid communication enabling fuel to exit the high pressure reservoir.20. A fuel pump assembly as claimed in claim 19 , wherein the mechanical regulating valve is active within an operational pressure range extending between a first pressure threshold below which the inlet fluid communication is fully open and claim 19 , a second pressure threshold above which opens the return fluid communication.21. A fuel pump assembly as claimed in claim 20 , wherein throughout the operational pressure ...

SUCTION VALVE FOR HIGH-PRESSURE FUEL PUMP

A suction valve of a high-pressure fuel pump for a vehicle includes a housing having an inlet through which a fuel is introduced and a pump chamber configured to press the fuel, a valve installation space arranged between the inlet and the pump chamber, and a solenoid part provided with a rod for performing a linear reciprocal motion, and further includes a valve sleeve inserted into the valve installation space and formed with a flow hole, a valve spring seated on the valve sleeve, a valve plate elastically supported by the valve spring, and moving in conjunction with the rod, and a valve sheet formed with an introduction hole opened and closed by the valve plate, in which the valve sleeve is slid and inserted into the valve installation space, and the valve sheet is fitted into and fastened to the valve installation space to support the valve sleeve. 1. A suction valve of a high-pressure fuel pump , the suction valve comprising:a housing having an inlet through which a fuel is introduced and a pump chamber configured to press the fuel, a valve installation space arranged between the inlet and the pump chamber, and a solenoid part provided with a rod for performing a linear reciprocal motion;a valve sleeve inserted into the valve installation space and formed with a flow hole;a valve spring seated on the valve sleeve;a valve plate elastically supported by the valve spring, and moving in conjunction with the rod; anda valve sheet formed with an introduction hole opened and closed by the valve plate,wherein the valve sleeve is slid and inserted into the valve installation space, andwherein the valve sheet is fitted into and fastened to the valve installation space to support the valve sleeve to fix a location of the valve sleeve.2. The suction valve of claim 1 , wherein the valve sleeve comprises:a support part having a fixed location between a seating part formed to protrude inward from the valve installation space and the valve sheet;a guide part provided inside ...

FUEL PUMP

A pump having a housing defining a pump chamber, an inlet, and an inlet passageway fluidly connecting the inlet to the pump chamber. A solenoid actuated inlet valve is disposed in series with the inlet passageway and movable between an open position and a closed position. A core is mounted to the housing while an anchor is aligned along an axis with the core in the housing. The anchor mechanically contacts the valve member so that the anchor displaces the valve member between its open and closed position as the anchor moves between a first and a second position. The facing ends of the anchor and core are shaped so that only a portion of the area of those ends come in contact with each other when the solenoid is energized and the anchor is in its second position thereby reducing the impact sound. 1. A pump comprising:a housing having a pump chamber, an inlet and an inlet passageway fluidly connecting said inlet to said pump chamber,an inlet valve disposed in series with said inlet passageway, said valve movable between an open position and a closed position,a core mounted to said housing,an anchor aligned along an axis with said core in said housing, said anchor mechanically contacting said valve member so that said anchor displaces said valve member between said open and closed positions as said anchor axially moves between a first position in which an end of said anchor and an end of said core are spaced apart from each other and a second position in which said anchor and said core contact each other,wherein said ends of said anchor and said core are shaped so that only a portion of the area of said ends come in contact with each other when said anchor is in said second position.2. The pump as defined in wherein said ends of said anchor and core have complementary recesses and rises and wherein only a portion of said recesses and rises contact each other when said anchor is in said second position.3. The pump as defined in wherein said recesses and rises are teeth ...

DIRECT INJECTION PUMP CONTROL

Methods are provided for controlling a solenoid spill valve of a direct injection fuel pump, wherein the solenoid spill valve is energized and de-energized according to certain conditions. An example control strategy is provided for operating the direct injection fuel pump when fuel vapor is detected at an inlet of the direct injection fuel pump. To ensure pump effectiveness during the presence of fuel vapor, the solenoid spill valve may be maintained energized for a minimum angular duration past a top-dead-center position of a piston in the direct injection fuel pump. 1. A method , comprising:energizing a solenoid spill valve of a direct injection fuel pump for an angle past top center of a piston in the direct injection fuel pump in response to fuel vapor detected at an inlet of the direct injection fuel pump.2. The method of claim 1 , wherein fuel vapor is detected based on fuel capacitance.3. The method of claim 2 , wherein the fuel capacitance is measured via a fuel composition sensor positioned downstream of a lift pump and upstream of the direct injection fuel pump claim 2 , the lift pump supplying fuel to the direct injection fuel pump.4. The method of claim 1 , wherein the fuel vapor is detected based on a difference between a commanded fuel amount and an actual fuel amount pumped; and wherein the actual fuel amount pumped is based on a FRP change and a fuel injection amount over a period.5. The method of claim 1 , wherein the solenoid spill valve is maintained energized until after a top-dead-center position of the piston is reached.6. The method of claim 1 , wherein energizing the solenoid spill valve includes sending signals to the solenoid spill valve from a controller.7. The method of claim 6 , wherein the controller further detects angular position of a driving cam that powers the direct injection fuel pump in order to synchronize energizing the solenoid spill valve.8. The method of claim 1 , further comprising claim 1 , when fuel vapor is not ...

HIGH PRESSURE PUMP

A high pressure fuel pump unit includes a pump head where an inlet channel opens into a low-pressure chamber itself in fluid communication with a compression chamber. A valve is arranged so that when it is closed the fuel fills the low-pressure chamber and when the valve opens the fuel flows from the low-pressure chamber into the compression chamber. The pump head also includes a resilient member arranged so that when the valve is closed, the resilient member deforms to increase the volume of the low pressure chamber. When the valve opens, the fuel flows into the compression chamber, pushed by the resilient member which takes back its original shape. 18-. (canceled)9. A high pressure fuel pump unit comprising:a pump head with an inlet channel which opens into a low-pressure chamber, the low-pressure chamber being in fluid communication with a compression chamber;a valve which controls the fluid communication between the low-pressure chamber and the compression chamber so that when the valve is closed, fuel fills the low-pressure chamber and when the valve is open, fuel flows from the low-pressure chamber into the compression chamber; anda resilient member arranged so that when the valve is closed, the resilient member deforms, thereby increasing the volume of the low-pressure chamber and when the valve is open, fuel flows into the compression chamber pushed by the resilient member which takes back its shape prior to being deformed to increase the volume of the low-pressure chamber.10. A pump unit as set in wherein the low-pressure chamber has a plurality of peripheral walls claim 9 , the resilient member being one of the plurality of peripheral walls.11. A pump unit as set in wherein the low-pressure chamber is defined within a top cap fixed to the pump head claim 10 , the top cap having a transversal top wall and a cylindrical wall extending away from the transversal top wall to the pump head claim 10 , the resilient member being the transversal top wall.12. A pump ...

High-Pressure Fuel Pump

A high-pressure fuel pump includes a pressurizing chamber for pressurizing fuel, an outlet valve for discharging the fuel pressurized in the pressurizing chamber to an outlet passage, a relief passage for connecting the outlet passage located downstream of the outlet valve and the pressurizing chamber with each other while bypassing the outlet valve. A relief valve device is provided in the relief passage and adapted to open when an internal pressure of the outlet passage becomes higher than that of the pressurizing chamber, thereby providing communication between the outlet passage and the pressurizing chamber. The relief valve includes a relief spring mechanism for pressing a relief valve to a relief valve seat. At least the relief spring mechanism among members of the relief valve device is provided outside the pressurizing chamber in the pump body. 1. A high-pressure fuel pump comprising:a pressurizing chamber which is formed in a pump body;an outlet valve device which is disposed on an outlet passage side from the pressurizing chamber;a relief valve device which is disposed in a relief passage fluidly connecting the outlet passage to the pressurizing chamber, while bypassing the outlet valve, whereinthe relief valve device includes a relief valve, a relief valve seat, and a relief spring configured to pull the relief valve toward the relief valve seat,the relief valve device in the relief passage is fixed so as to close an aperture connecting to the pressurizing chamber, andthe relief spring is disposed on an opposite side of the relief valve seat from the pressurizing chamber.2. The high-pressure fuel pump according to claim 1 , wherein the valve seat closes the aperture on the opposite side from the pressurizing chamber.3. The high-pressure fuel pump according to claim 2 , wherein the valve seat has a seat surface formed on the pressurizing chamber side and a spring receiving surface formed on the opposite side from the seat surface.4. The high-pressure fuel ...

HIGH PRESSURE FUEL SUPPLY PUMP WITH ELECTROMAGNETIC SUCTION VALVE

To reduce collision noise created by the operation of an electromagnetic suction valve provided on a high pressure fuel supply pump. In the present invention, in order to achieve the above object, the mass of a member which collides by magnetic attractive force is reduced to reduce the noise to be generated. The thus configured present invention provides the following advantageous effects. The noise generated when a core and an anchor collide with each other by magnetic attractive force depends on the magnitude of the kinetic energy of a moving element. The kinetic energy to be consumed in the collision is only the kinetic energy of the anchor. The kinetic energy of a rod, being absorbed by a spring, does not contribute to the noise; thus, the energy when the anchor and the core collide with each other can be reduced, whereby the noise to be created can be reduced. 1. A high pressure fuel supply pump comprising;a suction valve provided in a suction side of a compression chamber;a rod urging the suction valve by a spring;an anchor moving the rod part to a direction opposite to an urging direction of the spring by magnetic attraction force, and is independently constituted by another body different from the rod;a fixed core attracting the anchor by the magnetic attraction force;the spring is provided in inner circumference side of the anchor and inner circumference side of the fixed core.2. The high pressure fuel supply pump according to claim 1 , further comprising;a first recessed part arranged in the anchor;a second recessed part arranged in the fixed core;wherein the spring is provided in inner circumference side of the first recessed part and inner circumference side of second recessed part.3. The high pressure fuel supply pump according to claim 1 , further comprising;a protrusion part arranged on an outer peripheral side of the rod,wherein the protrusion part moves the anchor to an opening direction together whereby an engaging part between the protrusion part ...

HIGH PRESSURE DIESEL FUEL PUMP PUMPING ELEMENT

The present disclosure generally relates to a pumping element of a fuel pump for an internal combustion engine wherein the pumping element comprises a pumping chamber and a check valve assembly having a first insert including a passage in flow communication with a fuel outlet, and a second insert being disposed adjacent the pumping chamber, the second insert including a bore in flow communication with a fuel inlet, a plurality of through holes in flow communication with the pumping chamber, and an inlet check valve plunger disposed in the bore for movement between an opened position wherein inlet fuel from the fuel inlet flows past the inlet check valve plunger through the plurality of through holes to the pumping chamber and a closed position wherein outlet fuel from the pumping chamber flows through the plurality of through holes past the inlet check valve plunger to the passage of the first insert. 1. A pumping element comprising:a check valve having a first insert including at least one angled passage and a second insert including a central bore and an inlet check valve plunger disposed in the central bore; anda pumping chamber wherein the second insert of the check valve is disposed adjacent the pumping chamber, the second insert including a plurality of through-holes configured to allow fuel to enter and exit the pumping chamber.2. The pumping element of claim 1 , wherein the second insert of the check valve includes a first end and a second end claim 1 , wherein the central bore extends from the first end downwardly along a longitudinal axis of the check valve.3. The pumping element of claim 2 , wherein the plurality of through-holes extend from the second end and terminate at the central bore.4. The pumping element of claim 3 , wherein each one of the plurality of through-holes includes a first diameter at the second end and a second diameter at the central bore claim 3 , wherein the first diameter is greater than the second diameter.5. The pumping element ...

FUEL PUMP ASSEMBLY

A fuel pump assembly for pressurizing fuel such as dimethyl ether (DME). The fuel pump assembly includes a plunger assembly and a pump block defining a pumping chamber and a plunger assembly cavity in communication with the pumping chamber. The plunger assembly is movable at least partially in the plunger assembly cavity towards and from the pumping chamber. The fuel pump assembly includes a metering valve and a suction channel located between the metering valve and the pumping chamber in an intended direction of flow of the fuel, wherein the fuel pump assembly comprises a leakage return conduit, with a first leakage return conduit opening in fluid communication with said plunger assembly cavity, adapted to return fuel that has leaked from the pumping chamber. The leakage return conduit includes a second leakage return conduit opening located in the suction channel. 1. A fuel pump assembly for pressurizing fuel , the fuel comprising a high-volatility fuel , such as dimethyl ether (DME) , the fuel pump assembly comprising a plunger assembly and a pump block defining a pumping chamber and a plunger assembly cavity in communication with the pumping chamber , the plunger assembly being movable at least partially in the plunger assembly cavity towards and away from the pumping chamber , wherein the fuel pump assembly comprises a metering valve and a suction channel located between the metering valve and the pumping chamber in an intended direction of flow of the fuel , wherein the fuel pump assembly comprises a leakage return conduit , with a first leakage return conduit opening in fluid communication with the plunger assembly cavity , adapted to return fuel that has leaked from the pumping chamber , wherein the leakage return conduit comprises a second leakage return conduit opening located in said suction channel , wherein wherein the pumping chamber assumes a minimum volume when the plunger assembly is at a top position and wherein the pumping chamber assumes a ...

High-pressure fuel pump including a discharge valve with a valve ball and a valve body

A high-pressure fuel pump which includes a discharge valve with a valve ball and a valve body, the valve body having a sealing section on which a sealing seat is present, and having a guide section in which the valve ball is guided. The guide section includes a first plurality of axially protruding webs between which first flow paths are formed, an opening which faces radially outwardly being present at least between two adjacent webs.

High-Pressure Fuel Pump having an Outlet Valve

A high-pressure fuel pump includes an outlet valve, a valve ball, a valve spring that acts on the valve ball in a closing direction, and a stop body for the valve ball. The stop body has a stop section that limits the opening stroke of the valve ball, and the valve spring is supported by the stop body. The stop body has a cut-out section that at least partially accommodates the valve spring and that has a radial inner periphery which forms a guide for the valve spring. 1. A high-pressure fuel pump , comprising:an outlet valve with a valve ball;a valve spring acting on the valve ball in the closing direction; anda stop body configured for the valve ball, the stop body having a stop portion that limits the opening stroke of the valve ball,wherein the valve spring rests on the stop body, andwherein the stop body has a recess in which the valve spring is received at least in regions, the recess having a radial inner limiting face that forms a guide configured for the valve spring.2. The high-pressure fuel pump as claimed in claim 1 , wherein an edge of the recess facing the valve ball in the stop body forms an annular stop portion.3. The high-pressure fuel pump as claimed in claim 1 , wherein the valve ball comprises a steel material.4. The high-pressure fuel pump as claimed in claim 1 , wherein the recess has a simple cylindrical cross-section.5. The high-pressure fuel pump as claimed in claim 1 , wherein the valve spring is configured as a coil spring and has different diameters in the axial direction.6. The high-pressure fuel pump as claimed in claim 1 , further comprising a valve body on which a sealing seat is formed and which has a guide collar in which the valve ball is guided radially claim 1 ,wherein the guide collar has a first plurality of recesses that are arranged evenly distributed in the peripheral direction and form first flow channels, andwherein the stop body, radially outside the recess, has a second plurality of recesses that are arranged evenly ...

ARRANGEMENT OF A VALVE CLIPPED TO A PUMP

A snap-fitted arrangement of a valve on a pump includes means of which at least one is elastic such that one of the means is integrated with the valve and the other means is integrated with the pump. The means are arranged in a complementary manner in a linear engagement of the male-female type such that the elastic means elastically deforms during engagement. One of the means includes a channel and the other means includes a protuberance which engages the channel. 1. (canceled)2. The arrangement as claimed in claim 9 , in which the casing and the body are provided with radial faces arranged pressing against one another when the protuberance engages in the channel such that the casing is snap-fitted onto the body and is axially positioned relative to the body.3. The arrangement as claimed in claim 2 , in which claim 2 , when the protuberance engages in the channel claim 2 , the elastic means returns to its rest shape claim 2 , retaining a residual elastic deformation such that the casing is snap-fitted claim 2 , positioned axially and held radially relative to the body.4. The arrangement as claimed in claim 3 , in which the channel and the protuberance are provided with complementary faces held against one another by the residual elastic deformation and producing an axial force pressing the casing against the body such that the valve is snap-fitted claim 3 , axially and held radially relative to the device.5. The arrangement as claimed in claim 4 , in which the complementary faces of the channel and of the protuberance are conical faces whose vertices are on the main axis and are oriented towards the interior of the body.6. The arrangement as claimed in claim 9 , in which the elastic means deforms claim 9 , thereby allowing the valve and the device to be separated in a non-destructive manner.7. The arrangement as claimed in claim 9 , in which the body is that of a high-pressure fuel pump and in which the valve controls the ingress of fuel into the pump.8. (canceled) ...

HIGH-PRESSURE PUMP

In a high-pressure pump, a relief valve main body has a rod shape. A relief valve seat portion is integrated with an end of a relief valve main body so as to be capable of contacting a relief valve seat. The relief valve main body is inserted into a guide hole portion of a support portion. The guide hole portion slidably supports an outer wall of the relief valve main body so as to guide a reciprocating movement of the relief valve main body in the axial direction. A fuel guide portion is provided at an end portion of the relief valve main body facing the pressurizing chamber and can guide a flow of the fuel in a direction radially outward of the relief valve main body on the way from the pressurizing chamber toward the valve seat portion. 1. A high-pressure pump comprising:a pump body including a pressurizing chamber that pressurizes a fuel, and a discharge passage through which the fuel pressurized and discharged by the pressurizing chamber flows;a valve seat portion that includes a valve seat main body which is provided in the discharge passage to partition the discharge passage into a first space positioned between the valve seat main body and the pressurizing chamber and a second space positioned on an opposite side of the valve seat main body from the pressurizing chamber, a discharge valve passage which is provided in the valve seat main body and connects the first space and the second space, a relief valve passage which is provided in the valve seat main body and connects the second space and the first space without communicating with the discharge valve passage, a discharge valve seat having an annular shape and surrounding an opening of the discharge valve passage of the valve seat main body in the second space, and a relief valve seat having an annular shape and surrounding an opening of the relieve valve passage of the valve seat main body in the first space;a discharge valve member provided in the second space to be capable of contacting the discharge ...

HIGH PRESSURE FUEL SUPPLY PUMP WITH ELECTROMAGNETIC SUCTION VALVE

To reduce collision noise created by the operation of an electromagnetic suction valve provided on a high pressure fuel supply pump. In the present invention, in order to achieve the above object, the mass of a member which collides by magnetic attractive force is reduced to reduce the noise to be generated. The thus configured present invention provides the following advantageous effects. The noise generated when a core and an anchor collide with each other by magnetic attractive force depends on the magnitude of the kinetic energy of a moving element. The kinetic energy to be consumed in the collision is only the kinetic energy of the anchor. The kinetic energy of a rod, being absorbed by a spring, does not contribute to the noise; thus, the energy when the anchor and the core collide with each other can be reduced, whereby the noise to be created can be reduced. 1. A high pressure fuel supply pump with an electromagnetic suction valve , the electromagnetic suction valve comprising:a suction valve that is contactable to and separable from a suction valve seat;an anchor that is configured to move toward a core by magnetic attractive force generated between the anchor and the core; anda rod that is movable relative to the anchor and the suction valve, whereinwhen the rod is in contact with the anchor and the suction valve, a clearance between the anchor and the core is set greater than a stroke between the suction valve and the suction valve seat.2. The high pressure fuel supply pump with electromagnetic suction valve according to claim 1 , further comprising:a spring that biases the rod in a valve-opening direction against the magnetic attractive force, whereinthe rod is configured to stop moving by a biasing force of the spring after the anchor stops moving.3. The high pressure fuel supply pump with electromagnetic suction valve according to claim 2 , wherein the anchor has:a first through hole into which the rod is inserted; anda second through hole that ...

Manually Actuatable Feed Pump and Fuel System with a Feed Pump

A manually actuated feed pump is provided with a primer bulb to be manually actuated by an operator. The primer bulb has a pump chamber. A travel-controlled valve connects the pump chamber to a fuel line. The travel-controlled valve has a valve member that is moved by an actuation travel of the primer bulb into an open position that opens the travel-controlled valve. A first spring is operatively connected to the valve member and to the primer bulb. The primer bulb acts through the first spring on the valve member. 1. A manually actuated feed pump comprising:a primer bulb configured to be manually actuated by an operator, wherein the primer bulb comprises a pump chamber;a travel-controlled valve connecting the pump chamber to a fuel line;wherein the travel-controlled valve comprises a valve member, wherein the valve member is moved by an actuation travel of the primer bulb into an open position that opens the travel-controlled valve;a first spring operatively connected to the valve member and to the primer bulb, wherein the primer bulb acts through the first spring on the valve member.2. The feed pump according to claim 1 , wherein the primer bulb acts immediately on the first spring.3. The feed pump according to claim 2 , wherein the first spring is secured against rotation relative to the primer bulb.4. The feed pump according to claim 1 , wherein the first spring in a non-actuated state of the primer bulb has a spacing relative to the primer bulb.5. The feed pump according to claim 1 , wherein the actuation travel of the primer bulb amounts to at least two times an actuation travel of the valve member for moving the valve member into the open position.6. The feed pump according to claim 1 , further comprising a second spring claim 1 , wherein the second spring is acting on the valve member in a closing direction of the travel-controlled valve.7. The feed pump according to claim 6 , wherein a spring constant of the second spring is greater than a spring constant ...

VALVE, IN PARTICULAR A SUCTION VALVE, IN A HIGH-PRESSURE PUMP OF A FUEL INJECTION SYSTEM

The invention relates to a valve, in particular a suction valve (), in particular in a high-pressure pump of a fuel injection system, having a valve element () that moves between an open position and a closed position, comprising a magnet armature () which is in mechanical contact with the valve element () in the axial direction and which is in contact with a first pressure spring () on the side facing away from the valve element (), and wherein the magnet armature () can be axially moved via an electromagnetic actuation and same is supported in a starting position on a valve body () via a stop plate (). According to the invention, the stop plate () is held in contact with the valve body () via a securing element (). The invention also relates to a high-pressure pump comprising a suction valve of this type. 114101441410402020408. A valve , comprising a valve element () configured to move between an open position and a closed position , and a magnet armature () , which is in mechanical contact with the valve element () in an axial direction and which is in contact with a first compression spring () on a side facing away from the valve element () , and wherein the magnet armature () is configured to be moved axially by an electromagnetic actuation and , in a starting position , is supported on a valve body () via a stop plate () , characterized in that the stop plate () is held in contact with the valve body () in the axial direction by means of a securing element ().2840. The valve as claimed in claim 1 , characterized in that the securing element () is connected nonpositively and/or positively to the valve body ().3820. The valve as claimed in characterized in that the securing element () is connected nonpositively and/or positively to the stop plate ().420478. The valve as claimed in claim 3 , characterized in that the stop plate () has an undercut and/or a bevel () in a region of an inside diameter which is in contact with the securing element ().58408. The valve ...

On-Off Valve For A Fuel Injection System, And High-Pressure Fuel Pump

Various embodiments include a valve comprising a valve body including a valve seat; and a valve element movable along a longitudinal axis to close the on-off valve by sealing against the valve seat. The valve body includes a conical lateral surface. The valve body includes a radially extending spring projection which is resilient in an axial direction and projects radially beyond the lateral surface. 1. An on-off valve for a fuel injection system of an internal combustion engine , the valve comprising:a valve body including a valve seat; anda valve element movable along a longitudinal axis to close the on-off valve by sealing against the valve seat;wherein the valve body includes a conical lateral surface; andthe valve body includes a radially extending spring projection which is resilient in an axial direction and projects radially beyond the lateral surface.2. The on-off valve as claimed in claim 1 , wherein:the valve body comprises, on the lateral surface, a radial annular outlet groove dividing the valve body into a first conical ring element and a second conical ring element;a first lateral surface of the first conical ring element and a second lateral surface of the second conical ring element both enclose a single opening angle with respect to the longitudinal axis.3. The on-off valve as claimed in claim 2 , wherein:the first ring element comprises the spring projectionthe spring projection includes a radial bearing surface and a runout surface opposite the bearing surface; andthe spring projection is arranged obliquely to the longitudinal axis and merges into the annular outlet groove.4. The on-off valve as claimed in claim 2 , wherein:the first ring element comprises that the valve seat and a valve inlet; andthe valve inlet comprises an axial hole in the first ring element.5. The on-off valve as claimed in claim 2 , wherein:the first ring element comprises, on the first lateral surface, a first encircling seal groove containing a sealing element;the second ...