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Небесная энциклопедия

Космические корабли и станции, автоматические КА и методы их проектирования, бортовые комплексы управления, системы и средства жизнеобеспечения, особенности технологии производства ракетно-космических систем

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Мониторинг СМИ

Мониторинг СМИ и социальных сетей. Сканирование интернета, новостных сайтов, специализированных контентных площадок на базе мессенджеров. Гибкие настройки фильтров и первоначальных источников.

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Поддерживает ввод нескольких поисковых фраз (по одной на строку). При поиске обеспечивает поддержку морфологии русского и английского языка
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Применить Всего найдено 3516. Отображено 100.
08-03-2012 дата публикации

Variable valve timing control apparatus

Номер: US20120055429A1
Автор: Haruyuki Urushihata, Takayoshi Nakamura
Принадлежит: Denso Corp

A variable valve timing control apparatus includes an abnormality determining portion and a valve controller. The abnormality determining portion determines whether there is an abnormality in a system of a VCT phase control in which an oil pressure control valve is controlled in a manner that an actual VCT phase coincides with a target phase. The valve controller controls the oil pressure control valve to drive a lock pin in a locking direction so as to lock the VCT phase when the abnormality determining portion determines that there is an abnormality in the system of the VCT phase control.

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Номер записи: 1
16-08-2012 дата публикации

Oil supply apparatus for internal combustion engine

Номер: US20120204823A1
Автор: Hiroshi Kanai
Принадлежит: Toyota Motor Corp

An oil supply apparatus includes an oil pump that is driven by an internal combustion engine; a supply passage that is connected to a discharge side of the oil pump; a lubricant passage that leads hydraulic fluid from the supply passage to a portion to be lubricated that is provided in the internal combustion engine; a hydraulic passage that leads hydraulic fluid from the supply passage to a variable valve mechanism; a flow regulating valve capable of regulating a flowrate of hydraulic fluid that flows through the lubricant passage; and a control apparatus that controls the flow regulating valve in a closing direction at startup of the internal combustion engine such that a pressure of hydraulic fluid that is led to the variable valve mechanism when the internal combustion engine is being cranked comes to be equal to or greater than a predetermined target pressure.

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Номер записи: 2
16-08-2012 дата публикации

Variable valve lift mechanism fault detection systems and methods

Номер: US20120209494A1
Автор: Julian R. Verdejo, Kenneth J. Buslepp, Nicholas John Kalweit
Принадлежит: GM GLOBAL TECHNOLOGY OPERATIONS LLC

A system for a vehicle includes a filtering module, an indicated mean effective pressure (IMEP) determination module, and a stuck mechanism indicator module. The filtering module generates engine speeds based on positions of teeth of a toothed wheel that rotates with a crankshaft and based on a crankshaft position signal generated by a crankshaft position sensor. The IMEP determination module determines an IMEP for a combustion cycle of a cylinder of an engine based on squares of first and second ones of the engine speeds during the combustion cycle. The stuck mechanism indicator module selectively diagnoses a fault in a variable valve lift (VVL) mechanism of the cylinder based on the IMEP.

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Номер записи: 3
04-10-2012 дата публикации

System and method for cam phaser control in an engine

Номер: US20120247411A1
Автор: Etsuko Muraji Stewart, James R. Yurgil
Принадлежит: GM GLOBAL TECHNOLOGY OPERATIONS LLC

A control system for an engine includes a position determination module and a position control module. The position determination module determines a first cam phaser position for starting the engine prior to engine shut down, and determines a second cam phaser position for starting the engine while the engine is shut down. The position control module adjusts a cam phaser to the first cam phaser position at engine shut down. The position control module adjusts the cam phaser from the first cam phaser position to the second cam phaser at engine start up when a difference between the first cam phaser position and the second cam phaser position is greater than a predetermined difference. A method for controlling an engine is also provided.

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Номер записи: 4
22-11-2012 дата публикации

Variable valve actuation apparatus, system, and method

Номер: US20120291733A1
Автор: Adam C. Cecil, David M. Barnes
Принадлежит: Individual

A variable valve actuation system is disclosed. In one form a rocker is disclosed coupled with a valve stem at one end and a cam follower at the other end. The rocker is operable to pivot about a fixed axis. The cam follower is operable to be pivotally coupled with the rocker at one end of the cam follower. The cam follower includes a lower roller and an upper roller at its other end, each operable to engage cam lobes on separate cam shafts. In one form the cam follower includes a lower roller operable to follow a cam lobe on a lower cam shaft and an upper roller operable to follow a cam lobe on an upper cam shaft. The upper cam shaft and the lower cam shaft can have variable lobes. A spring can be used to bias the cam follower on the rocker.

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Номер записи: 5
13-12-2012 дата публикации

Variable Geometry Cam Shafts For Multiple-Cylinder Internal Combustion Engines

Номер: US20120312263A1
Автор: Francisco A. Arrieta
Принадлежит: Individual

A method of conserving fuel in the operation of multi-cylinder internal combustion engines. The present method described here allows a portion of the cylinders of an internal combustion engine to be de-activated when less power is required, thus allowing the engine to provide full power when required, or less power with substantial fuel savings. The present method does so by altering the normal operation of intake and exhaust valves by leaving the intake valve at least partially closed, and the exhaust valve at least partially open. The present method overcomes numerous problems in the prior art, such as excess load placed on the engine caused by trapped gases, damaging thermal gradients across the engine block, and difficulty of retrofitting existing engines.

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Номер записи: 6
21-03-2013 дата публикации

Apparatus and method for controlling variable valve mechanism

Номер: US20130068181A1
Автор: Kenichi Machida, Norihiro ARAYA
Принадлежит: HITACHI AUTOMOTIVE SYSTEMS LTD

An control apparatus for a variable valve mechanism, is capable of executing fail safe control in a case in which locking occurs in either one of a cam shaft of a double shaft structure. The control apparatus for a variable valve mechanism has a cam shaft of a double shaft structure including an outer cam shaft and an inner cam shaft, such that it is possible to adjust the phase of a sub cam of inner cam shaft with respect to an main cam of outer cam shaft, and by means these cams, at least one of an intake valve and an exhaust valve of an internal combustion engine is operated. When an abnormality is detected in one of the cam shafts, the control apparatus controls the phase of the cam of the other cam shaft, in accordance with the determined current phase of the cam.

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Номер записи: 7
04-04-2013 дата публикации

Control apparatus and control method for variable mechanism

Номер: US20130085654A1
Автор: Shunsuke Habara, Shunsuke Yamamoto, Takashi Nakagawa
Принадлежит: Toyota Motor Corp

In a control apparatus and a control method for a variable mechanism, when a predetermined condition is fulfilled, a movable member ( 3 ) is driven until an engagement portion ( 31 ) contacts one restriction member ( 22 ), and the absolute position of the movable member ( 3 ) when it is determined that displacement of the movable member ( 3 ) is stopped is learned, as a reference position. When supply of electric power is stopped, the absolute position of the movable member ( 3 ) is learned as an initial reference position. When electric power is supplied, the movable member ( 3 ) is driven from the initial reference position until the engagement portion ( 31 ) contacts the one restriction member ( 22 ), and a one-side displacement amount is calculated. If the one-side displacement amount is smaller than a one-side distance, it is determined that a foreign substance is caught in an area on a side of a site corresponding to the one restriction member ( 22 ) in a movable range.

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Номер записи: 8
16-05-2013 дата публикации

Valve opening and closing control apparatus

Номер: US20130118428A1
Автор: Hiroki Mukaide, Naoto Toma, Shigemitsu Suzuki
Принадлежит: Aisin Seiki Co Ltd

A valve opening and closing time control apparatus includes; a relative rotation angle control unit performs most delayed angle setting control of setting a relative rotation angle between a driving side rotating body and a driven side rotating body to the most delayed angle when performing an automatic stop, and most delayed angle restriction control of maintaining the relative rotation angle in the most delayed angle from a beginning of the automatic start until reaching a set timing when the automatic start-up begins, and releasing a maintenance of the most delayed angle after the setting timing.

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Номер записи: 9
30-05-2013 дата публикации

Shaft Such as a Camshaft for Internal Combustion Engines

Номер: US20130133195A1
Автор: Manfred Vogel, Matthias Bechtold, Matthias Derse, Thomas Winkler
Принадлежит: Neumayer Tekfor Holding GmbH

A shaft, such as a camshaft for use in the internal combustion engine of a motor vehicle, in which the shaft includes a basic shaft body, a plurality of functional bodies, such as cams, mounted in axially spaced positions on the basic shaft body, and at least one balancing element mounted on the basic shaft body, in which the at least one balancing element is produced separately from the basic shaft body and from the functional bodies, and the functional bodies and the at least one balancing element are subsequently mounted on said basic shaft body, for example, by axial press fitting.

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Номер записи: 10
08-08-2013 дата публикации

Valve timing controller

Номер: US20130199478A1
Автор: Kuniaki OKA, Makoto Otsubo, Shuhei Oe, Takashi Yamaguchi, Takehiro Tanaka, Taketsugu Sasaki, Yuusuke YASUKI
Принадлежит: Denso Corp, Nippon Soken Inc

A valve timing controller includes a lock mechanism that locks a rotation phase at a main lock phase when an internal combustion engine is started with an ambient temperature more than or equal to a preset temperature. The main lock phase represents a rotation phase set for closing an intake valve at a later timing later than a timing when a piston reaches a bottom dead center of a cylinder in the internal combustion engine. The lock mechanism locks the rotation phase at a sub lock phase representing a rotation phase advanced rather than the main lock phase in the internal combustion engine when the internal combustion engine is started with an ambient temperature lower than the present temperature.

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Номер записи: 11
19-09-2013 дата публикации

Control apparatus for variable valve actuation system and control method for variable valve actuation system

Номер: US20130239918A1
Автор: Shunsuke Yamamoto, Takashi Nakagawa
Принадлежит: Toyota Motor Corp

In a variable valve actuation system capable of changing the angle of action of intake valves by using an actuator whose movement range is between a high end and a low end at which the movement of the actuator is mechanically stopped, it is determined that a fixation is present on condition that the actual amount of movement of the actuator in response to a command A for movement toward the low end that is issued when the present movement position of the actuator is unknown is not more than a prescribed movement criterion value a and that the actual amount of movement in response to a command B output subsequently to the command A in order to cause the actuator to operate in a direction opposite to the direction of the movement in response to the command B is not more than a prescribed movement criterion value b.

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Номер записи: 12
03-10-2013 дата публикации

System to diagnose variable valve actuation malfunctions by monitoring fluid pressure in a control gallery

Номер: US20130255612A1
Автор: Austin Robert ZURFACE, Brian Karl VANDEUSEN, Robert Boychuk
Принадлежит: Eaton Corp

A system for diagnosing malfunctions in a variable valve actuation device is disclosed. The system has a rocker arm assembly that includes: a first arm, a second arm with the first and second arms attached at a first end, a hydraulically operated latch assembly that functions to secure the first arm to the second arm when latched. It also includes a source of pressurized fluid connected to a hydraulic valve that provided fluid high or low pressure fluid to the hydraulically-operated latch. The latch may be operated by a remote device. A control gallery connects the hydraulic valve to the latch. A pressure transducer is positioned within the gallery and is adapted to create a signal indicating the pressure in the gallery. A control unit is coupled to the hydraulic valve and the pressure transducer, and is adapted to sense engine operation parameters, actuate the hydraulic valve, read the signal from the pressure transducer; and identify malfunctions of the rocker arm assembly based upon the signal from the transducer.

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Номер записи: 13
24-10-2013 дата публикации

Air spring system for an internal combustion engine

Номер: US20130276729A1
Автор: Christian Berger, Gerhard WIESINGER, Johann Neuboeck, Michael Dopona, Roland Ennsmann, Roland Spatzenegger, Stefan Leiber, Werner Brandstaetter
Принадлежит: BRP Powertrain GmbH and Co KG

A method of supplying air to an air spring biasing one of an intake valve and an exhaust valve of an internal combustion engine to a closed position is disclosed. The method includes: driving an air compressor with a motor prior to starting of the internal combustion engine, the air compressor fluidly communicating with the air spring to supply air to the air spring; determining that a predetermined condition has been reached; starting the engine once the predetermined condition has been reached; and driving the air compressor with a rotating shaft of the engine once the engine has started.

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Номер записи: 14
28-11-2013 дата публикации

Systems, methods, and devices for valve stem position sensing

Номер: US20130312506A1
Автор: Douglas John NIELSEN, Mark William Hildebrandt
Принадлежит: Eaton Corp

A linear variable differential transformer (LVDT) for monitoring engine valve position is disclosed. The system includes a valve guide having an elongated recess through it. The engine valve has a valve head and a valve stem with two adjacent materials having different magnetic properties meeting at an interface. The valve stem fits and moves linearly within the valve guide, and the valve head closes an engine combustion chamber. It also includes monitoring coils within the valve guide that create a signal related to the position of the interface within the valve guide. An engine control unit (ECU) is coupled to the monitoring coils and receives and analyzes the signal from the monitoring coils to determine operation of the valve.

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Номер записи: 15
13-02-2014 дата публикации

Control system for internal combustion engine

Номер: US20140041607A1
Автор: Eiji Takahashi, Ryosuke Hiyoshi, Shinobu Kamada
Принадлежит: Nissan Motor Co Ltd

A control system is provided with a piston TDC (top dead center) position variable mechanism and a valve operational characteristics variable mechanism. An actual distance between the valve and the piston of closest approach is calculated based on the actual operation states of these mechanisms. In addition, a limit distance of closest approach necessary to avoid interference between the valve and the piston is set, and, the piston TDC position variable mechanism and the valve operational characteristics variable mechanism are controlled to be driven to increase the actual distance.

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Номер записи: 16
07-01-2021 дата публикации

Adaptive any-fuel camless reciprocating engine

Номер: US20210003087A1
Автор: Peter Sinsheimer, Raymond Mitchell Spearrin, Tsu-Chin Tsao
Принадлежит: UNIVERSITY OF CALIFORNIA

An adaptive, any-fuel reciprocating engine using sensor feedback integration of high-speed optical sensors with real-time control loops to adaptively manage the electronic actuation schemes over a range of engine loads and fuels. The engine uses one or more optical sensors to collect specific types of gas property data via a spectroscopic technique to adaptively control various components within the engine.

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Номер записи: 17
03-01-2019 дата публикации

Method for Operating a Reciprocating Internal Combustion Engine

Номер: US20190003404A1
Автор: WAGNER Marc Oliver
Принадлежит: DAIMLER AG

A method for operating a reciprocating internal combustion engine in an engine braking mode includes, in a working cycle of the engine braking mode, a first outlet valve of a first cylinder is closed for a first time, then opened for a first time, and subsequently closed for a second time, and then opened for a second time, in order to thereby discharge gas that has been compressed in the first cylinder from the first cylinder by a cylinder piston. The outlet valve is held open after the first opening and prior to the second dosing long enough for the cylinder to be filled with gas that flows out of a second cylinder via at least one outlet channel, where when the engine braking mode is activated, at least one camshaft for activating at least one gas exchange valve of the reciprocating internal combustion engine is adjusted. 111.-. (canceled)12. A method for operating a reciprocating internal combustion engine in an exhaust braking mode , comprising the steps of:in the exhaust braking mode, within one operating cycle of a first cylinder, a first exhaust valve of the first cylinder is closed a first time, subsequently opened a first time, subsequently closed a second time, and subsequently opened a second time, in order to release gas, compressed in the first cylinder by a first piston of the first cylinder, from the first cylinder;wherein following the first opening and before the second closure, the first exhaust valve is kept open for as long as the first cylinder is filled with gas flowing out of a second cylinder of the reciprocating internal combustion engine via an exhaust duct, wherein a camshaft for actuating a gas exchange valve of the reciprocating internal combustion engine is adjusted when the exhaust braking mode is activated.13. The method according to claim 12 , wherein the camshaft is an intake camshaft and wherein via the intake camshaft it is possible to actuate claim 12 , as the gas exchange valve claim 12 , an intake valve that is associated with ...

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Номер записи: 18
03-01-2019 дата публикации

Determining sliding camshaft actuator pin position based on engine crankshaft angle

Номер: US20190003446A1
Автор: Dimitri Karatsinides, Douglas R. Verner, Timothy Karnjate, Timothy P. Philippart
Принадлежит: GM GLOBAL TECHNOLOGY OPERATIONS LLC

A method of determining a sliding camshaft actuator pin position based on engine crankshaft angle includes commanding a sliding camshaft actuator to perform a valve step shift, and monitoring an actuator's pin position during the valve step shift command. At least one crank angle is measured when the actuator pin position reaches or exceeds at least one predetermined pin position threshold and at least one remedial action is performed when the actuator pin position does not correlate to the at least one measured crank angle.

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Номер записи: 19
21-01-2016 дата публикации

Bias mechanisms for a rocker arm and lost motion component of a valve bridge

Номер: US20160017765A1
Автор: G. Michael GRON, Justin Baltrucki
Принадлежит: Jacobs Vehicle Systems Inc

Systems for actuating at least two engine comprise a valve bridge operatively connected to the at least two engine valves and having a hydraulically-actuated lost motion component. A rocker arm has a motion receiving end configured to receive valve actuation motions from a valve actuation motion source and a motion imparting end for conveying the valve actuation motions and hydraulic fluid to the lost motion component. The motion receiving end is biased toward the valve actuation motion source. A bias mechanism, supported by either the rocker arm, valve bridge or both, is configured to bias the motion receiving end of the rocker arm and the lost motion component into contact with each other. By maintaining such contact, the bias mechanism helps maintain the supply of hydraulic fluid from the rocker arm to the lost motion component.

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Номер записи: 20
18-01-2018 дата публикации

Control system for internal combustion engine

Номер: US20180016994A1
Автор: Yukihiro Nakasaka
Принадлежит: Toyota Motor Corp

A control system for an internal combustion engine is provided with a crankshaft, an intake camshaft with an intake cam, a timing chain, an intake variable valve timing mechanism configured to be able to change at least one of an opening timing and closing timing of an intake valve by controlling a phase of the intake cam, and an electronic control unit configured to set in advance a periodic correction coefficient to vibrate by a period identical to a rotational period of the timing chain and to control the intake variable valve timing mechanism by the periodic correction coefficient to make the phase of the intake cam a target phase.

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Номер записи: 21
17-01-2019 дата публикации

Controller for internal combustion engine

Номер: US20190017457A1
Автор: Atsushi Hanaura, Hirokazu Tanaka, Masaaki Kaneko, Seiichi Fujimoto, Suguru Kamiya, Tomohiro Kozaki
Принадлежит: Aisin Seiki Co Ltd

A controller for an internal combustion engine includes: a failure determination section which determines a failure state in a case where a relative rotation phase of an intake side valve opening and closing timing control mechanism does not change when controlling the mechanism after starting the driving of a starter motor and trying to change the relative rotation phase of the mechanism in a start control for starting an internal combustion engine. When the section determines a failure, the controller performs at least one of an intake air amount increase control in which an opening degree of a throttle valve is increased, an ignition timing advance angle control in which injection of fuel is performed at a timing earlier than a set timing and ignition is performed, and a multi-injection control in which the fuel is injected immediately before the ignition in addition to the fuel injection in an intake stroke.

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Номер записи: 22
16-01-2020 дата публикации

CYLINDER RECHARGING STRATEGIES FOR CYLINDER DEACTIVATION

Номер: US20200018197A1
Автор: Jr. James E, McCarthy, Nielsen Douglas J
Принадлежит: Eaton Intelligent Power Limited

A multiple-cylinder diesel engine system comprises an intake valve and an exhaust valve for each of the multiple cylinders. A valve control system is connected to selectively deactivate an intake valve and an exhaust valve for a selected cylinder. A fuel injection control system is connected to selectively deactivate fuel injection to the selected cylinder while increasing fuel to firing cylinders. The multiple cylinder diesel engine enters a cylinder deactivation mode whereby the valve control system deactivates the intake valve and the exhaust valve and the fuel injection control system deactivates the fuel injection to the cylinder while continuing to fire other cylinders of the multiple cylinder diesel engine. The valve control system selectively opens the deactivated intake valve to relieve a negative pressure condition in the deactivated cylinder. Alternatively, the valve control system opens the deactivated exhaust valve to relieve a negative pressure condition in the deactivated cylinder. 1. A method for cylinder deactivation in a multiple-cylinder diesel engine , comprising:selectively deactivating fuel injection to a selected cylinder of the diesel engine;selectively deactivating an intake valve and an exhaust valve for the selected cylinder in the diesel engine;firing at least one of the remaining cylinders of the diesel engine while the selected cylinder is deactivated;cycling a set of reciprocating pistons in both the selected cylinder and the firing cylinders; andintermittently selectively opening one or both of the intake valve and the exhaust valve for the selected cylinder to relieve a negative pressure condition in the selected cylinder.2. The method of claim 1 , wherein the selective opening is a low-lift claim 1 , late intake valve opening event (LIVO).3. The method of claim 1 , further comprising switching between a 4-stroke mode and an 8-stroke mode to relieve the negative pressure condition.4. The method of claim 1 , further comprising ...

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Номер записи: 23
26-01-2017 дата публикации

Method and Device for Inspecting a Valve Drive in an Internal Combustion Engine

Номер: US20170023699A1
Автор: VON SCHOENING Sebastian
Принадлежит:

A method for ascertaining a valve position of a valve of an internal combustion engine having a multiplicity of valves. The method includes illuminating a combustion chamber of the internal combustion engine, detecting light emerging from the illuminated combustion chamber on a side, averted from the combustion chamber, of the valve for ascertainment, and determining the valve position of the valve for ascertainment by way of the detected light. 1. A method for ascertaining a valve position of a valve of an internal combustion engine having a multiplicity of valves , the method comprising the acts of:illuminating a combustion chamber of the internal combustion engine;detecting light emerging from the illuminated combustion chamber on a side, averted from the combustion chamber, of the valve for ascertainment; anddetermining the valve position of the valve for ascertainment by way of the detected light.2. A method for ascertaining a respective valve position of at least two valves of an internal combustion engine having a multiplicity of valves , the method comprising the acts of:illuminating a combustion chamber of the internal combustion engine;detecting light emerging from the illuminated combustion chamber on a side, in each case averted from the combustion chamber, of the valves for ascertainment; anddetermining the respective valve position of the at least two valves for ascertainment on the basis of the light detected in each case.3. The method as claimed in claim 1 , wherein the step of detecting the emerging light is performed continuously or discontinuously.4. The method as claimed in claim 3 , wherein the step of detecting the emerging light comprises a detection of a change in a light intensity and/or an obstruction of the light emerging from the combustion chamber.5. The method as claimed in claim 4 , further comprising detecting a crank angle of a crankshaft of the internal combustion engine.6. The method as claimed in claim 5 , wherein the internal ...

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Номер записи: 24
28-01-2021 дата публикации

Pre-lubrication and skip fire operations during engine cranking

Номер: US20210025298A1
Автор: J. Steven Kolhouse, Lyle E. Kocher
Принадлежит: Cummins Inc

A system includes a valve actuation system, a pre-lubrication pump coupled to a lubrication circuit and configured to provide oil to the valve actuation system, a catalyst for receiving and treating exhaust gasses, and a controller. The controller is configured to identify an engine start request and determine whether the catalyst temperature is below a first threshold value. In response to determining that the catalyst temperature is below the first threshold value, the controller actuates the pre-lubrication pump to direct lubricant to the valve actuation system, controls the valve actuation system to deactivate at least one cylinder of an engine, and, subsequent to deactivating the at least one cylinder of the engine, cranks the engine.

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Номер записи: 25
09-02-2017 дата публикации

CAMSHAFT PHASER USING ONE-WAY SLIPPER CLUTCHES

Номер: US20170037749A1
Автор: Berndt Eric
Принадлежит:

A camshaft phaser comprising an advance one-way clutch and a retard one-way clutch. The camshaft phaser comprises an input component arranged to receive torque from an engine, an advance inner ring, a plurality of rollers circumferentially arranged around the advance inner ring, an advance outer ring radially disposed between the input component and the advance inner ring, and an actuation assembly arranged to be disposed within a camshaft, the actuation assembly comprises advance locking pin assemblies arranged in advance channels and an actuator rod. For an advanced mode, the actuator rod is arranged to radially displace advance locking pin assemblies to non-rotatably connect the camshaft and advance inner ring, the rollers ride up ramps on advance outer ring, which expands radially to engage the input component. The retard clutch is substantially similar, and arranged diametrically opposed, to the advance clutch. 1. A camshaft phaser , comprising:an input component arranged to receive torque from an engine;an advance inner ring;a plurality of rollers circumferentially arranged around the advance inner ring;an advance outer ring radially disposed between the input component and the advance inner ring; and, one or more advance locking pin assemblies operatively arranged in one or more advance channels; and,', 'an actuator rod, wherein:, 'an actuation assembly arranged to be disposed in a channel for a camshaft, the actuation assembly comprising the actuator rod is arranged to radially displace the one or more advance locking pin assemblies to engage the advance inner ring such that the camshaft and the advance inner ring are non-rotatably connected;', 'the advance inner ring is arranged to rotate, with respect to the input component, in a first circumferential direction; and,', 'the advance outer ring is arranged to block rotation of the advance inner ring with respect to the input component, in a second circumferential direction, opposite the first circumferential ...

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Номер записи: 26
06-02-2020 дата публикации

Electrically Latching Rocker Arm Assembly Having Built-In OBD Functionality

Номер: US20200040776A1
Автор: Busdiecker Matthew Richard, Gillette Nicholas Peter, Hughes Douglas Anthony, JR. James Edward, JUDS MARK ALLAN, McCarthy
Принадлежит: Eaton Intelligent Power Limited

An internal combustion engine includes a cam-actuated rocker arm assembly with a solenoid-actuated latch that provides for cylinder deactivation or variable valve actuation. The solenoid is in a position where its inductance varies significantly in relation to the position of a latch pin as it translates between latching and non-latching configurations. A sensor is positioned to monitor a current or a voltage in a circuit that includes the solenoid. The sensor data is analyzed to provide diagnostic information relating to the operation of the rocker arm assembly. 1. A method of providing diagnostic information for a rocker arm assembly , the method comprising:providing the rocker arm assembly with a latch pin that translates between a first position and a second position and a solenoid operative to actuate the latch pin, wherein the solenoid has an electrical response characteristic that varies with latch pin position as the latch pin translates between the first position and the second position;driving the circuit over a first interval;measuring a current in the circuit during the first interval to obtain a first data set;driving the circuit over a second interval;measuring a current in the circuit during the second interval to obtain a second data set;comparing the first data set to the second data set to obtain diagnostic information relating to location or movement of the latch pin.2. The method of claim 1 , driving the circuit over the first interval comprises providing the circuit with a DC voltage pulse predetermined to be sufficient to actuate the latch pin from the first position to the second position.3. The method of claim 1 , whereindriving the circuit over the first interval comprises providing a first DC voltage pulse to the circuit; anddriving the circuit over the second interval comprises providing a second voltage DC pulse to the circuit.4. The method of claim 3 , further comprising:between the first interval and the second interval driving the ...

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Номер записи: 27
06-02-2020 дата публикации

Method for the Combined Identification of Phase Differences of the Inlet Valve Stroke and of the Outlet Valve Stroke

Номер: US20200040830A1
Автор: Braun Tobias
Принадлежит: CPT Group GmbH

Various embodiments include a method for identifying valve stroke phase differences during operation comprising: measuring dynamic pressure oscillations in the air intake tract; generating a corresponding signal; acquiring a crankshaft phase angle; acquiring the phase position and the amplitude of a signal frequency of the oscillations based on the pressure oscillation using discrete Fourier transformation; acquiring a line of an equal phase position and of equal amplitude of the signal frequency reflecting the inlet and the outlet stroke phase difference using reference lines; acquiring a common intersection point of a line of equal phase position and a line of equal amplitude by projection into a common plane; and determining the stroke phase differences and from the common intersection point. 1. A method for the combined identification of an inlet valve stroke phase difference and of an outlet valve stroke phase difference of a cylinder of a series-production internal combustion engine during operation , the method comprising:measuring dynamic pressure oscillations, assignable to the cylinder, of the intake air in the air intake tract of the respective series-production internal combustion engine during operation;generating a corresponding pressure oscillation signal based on the measured oscillation;acquiring a crankshaft phase angle signal corresponding to the measured oscillations;acquiring the phase position and the amplitude of a respectively selected signal frequency of the measured pressure oscillations in relation to the crankshaft phase angle signal based on the pressure oscillation signal, using discrete Fourier transformation;acquiring, on the basis of the acquired phase position and amplitude of the respective selected signal frequency, in each case a line of an equal phase position and of equal amplitude of the respectively same signal frequency, the line reflecting the inlet valve stroke phase difference and the outlet valve stroke phase difference, ...

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Номер записи: 28
03-03-2022 дата публикации

Apparatus and Method for Controlling a Cam

Номер: US20220065141A1
Автор: CHOI JAEWON, Lee YoungMo, Song HaMyeong
Принадлежит: Vitesco Technologies GmbH

Various embodiments of the teachings herein include a method for controlling a cam using an ECU (electronic control unit) comprising: learning a holding region in which linearity is not ensured by increasing or decreasing a PWM signal while the cam maintains a holding state; based on the results of the learning, generating a final PWM signal; and transmitting the final PWM signal to an oil control valve. The final PWM signal comprises a sum of a minimum PWM signal for the cam to leave the holding region and a control PWM signal for the cam to reach a desired position. 1. A method for controlling a cam using an ECU (electronic control unit) , the method comprising:learning a holding region in which linearity is not ensured by increasing or decreasing a PWM signal while the cam maintains a holding state;based on the results of the learning, generating a final PWM signal;wherein the final PWM signal comprises a sum of a minimum PWM signal for the cam to leave the holding region and a control PWM signal for the cam to reach a desired position; andtransmitting the final PWM signal to an oil control valve.2. A method for controlling a cam according to claim 1 , further comprising starting the learning while the cam is operating normally claim 1 , based on detection of a phase of the cam using a cam position sensor.3. A method for controlling a cam according to claim 1 , wherein learning the holding region comprises:increasing the PWM signal if the cam is positioned in a target area;halting the increase of the PWM signal at an instant in which the position of the cam changes whilst increasing the PWM signal, and storing the PWM signal, the increase of which has been halted, as a holding advance region among the engine conditions;decreasing the PWM signal in the holding advance region;halting the decrease of the PWM signal at an instant the position of the cam changes whilst decreasing the PWM signal, and storing the PWM signal, the decrease of which has been halted, as a ...

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Номер записи: 29
14-02-2019 дата публикации

Variable valve control system having common valve and engine system having the same

Номер: US20190048762A1
Автор: Myung-Sik Choi, Young-Hong Kwak
Принадлежит: Hyundai Motor Co, Kia Motors Corp

A variable valve control system may include a variable valve mechanism having latching pins for performing variable valve lift by a pressure difference of oil, an oil control circuit block having a low-pressure oil line and a high-pressure oil line to control ON/OFF of the latching pins, and a rotation shaft valve having oil passages for switching the low-pressure oil line and the high-pressure oil line.

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Номер записи: 30
22-02-2018 дата публикации

Valve opening and closing timing control apparatus

Номер: US20180051599A1
Автор: Hiroyuki Amano, Masaki Kobayashi, Yoshiaki Yamakawa
Принадлежит: Aisin Seiki Co Ltd

A valve opening and closing timing control apparatus includes a drive-side rotational body, a driven-side rotational body, an intermediate lock mechanism which selectively switches between a lock state where displacement of a relative rotational phase of the driven-side rotational body relative to the drive-side rotational body is restrained in an intermediate lock phase and an unlock state where the lock state is released, and an electromagnetic valve. At a time of predetermined operation of an internal combustion engine, a value of the drive current is set as a boundary current, and the value of the drive current to be set as the boundary current differs, by a predetermined value, from a value of the drive current at a time when the unlock state was switched to the lock state due to the change of the drive current.

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Номер записи: 31
22-02-2018 дата публикации

METHOD FOR DIAGNOSING VARIABLE VALVE TIMING SYSTEM

Номер: US20180051644A1
Автор: Kim Yong Sik
Принадлежит: HYUNDAI MOTOR COMPANY

A method for diagnosing a variable valve timing system configured for enhancing precision of diagnosis regarding a variable valve timing system by precisely diagnosing whether an oil pressure detecting device of the variable valve timing system normally operates, may include a normal operation time determining operation of determining a normal operation time of an oil pressure detecting device to determine whether the oil pressure detecting device is normal after an engine starts, and a diagnosing operation of diagnosing whether the oil pressure detecting device is normal according to whether the oil pressure detecting device of the VVT system is turned off within the normal operation time or whether oil pressure reaches reference pressure. 1. A method for diagnosing a variable valve timing (VVT) system , the method comprising:a normal operation time determining operation of determining a normal operation time of an oil pressure detecting device to determine whether the oil pressure detecting device is normal after an engine starts; anda diagnosing operation of diagnosing whether the oil pressure detecting device is normal according to whether the oil pressure detecting device of the VVT system is turned off within the normal operation time or according to whether oil pressure reaches a reference pressure within the normal operation time.2. The method according to claim 1 , wherein claim 1 , in the diagnosing operation claim 1 , when the oil pressure detecting device is turned off or when the oil pressure reaches the reference pressure in a case in which a time which has lapsed after the engine started is within the normal operation time claim 1 , the oil pressure detecting device is diagnosed to be normal.3. The method according to claim 1 , wherein claim 1 , in the diagnosing operation claim 1 ,when a time which has lapsed after the engine started exceeds the normal operation time, a forcible operation command signal is provided to the VVT system, andwhen the VVT ...

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Номер записи: 32
26-02-2015 дата публикации

METHOD AND APPARATUS FOR MONITORING AN ELECTROMAGNETIC HYDRAULIC VALVE FOR A VARIABLE VALVE TIMING SYSTEM

Номер: US20150057879A1
Автор: Kretzschmar Lutz, Melzig Thomas, Pelters Stephan, Wunderlich Arno
Принадлежит:

A method monitors an electromagnetic hydraulic valve for controlling a hydraulically adjustable valve gear of a reciprocating piston engine. The hydraulic valve includes an electromagnetic coil and a moving armature configured to connect a control port hydraulically to a high-pressure port or a low-pressure port, depending on an energization of the coil. The method includes detecting a movement of the armature, using a control unit, in response to an energization of the coil based on a mutual induction in the coil and identifying a defect, using the control unit, if the expected mutual induction does not occur. 1. A method for monitoring an electromagnetic hydraulic valve for controlling a hydraulically adjustable valve gear of a reciprocating piston engine , the hydraulic valve including an electromagnetic coil and a moving armature configured to connect a control port hydraulically to a high-pressure port or a low-pressure port , depending on an energization of the coil , the method comprising:detecting a movement of the armature, using a control unit, in response to an energization of the coil based on a mutual induction in the coil; andidentifying a defect, using the control unit, if the expected mutual induction does not occur.2. The method as recited in claim 1 , further comprising:switching on a current through the coil;sampling a voltage or a current on the coil;detecting that there is no temporary dip in the voltage or the current after switching on, anddetecting the defect.3. The method as recited in claim 2 , further comprising detecting that the temporary dip does not occur in a predetermined time window after switching on.4. The method as recited in claim 3 , wherein a start of the time window is chosen in such a way that it lies before an expected beginning of movement of the armature.5. The method as recited in claim 3 , wherein an end of the time window is chosen in such a way that it lies before an expected end of movement of the armature.6. The ...

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Номер записи: 33
21-02-2019 дата публикации

DEVICE FOR CONTROLLING AT LEAST ONE VALVE IN AN INTERNAL COMBUSTION ENGINE

Номер: US20190055861A1
Автор: Persson Per
Принадлежит: VOLVO TRUCK CORPORATION

A gas valve actuation device for an internal combustion engine includes a first arrangement for actuating two gas valves in a first lift event, a second arrangement for selectively actuating a first one of the two gas valves in a second lift event, a fluid circuit for controlling actuation of the first gas valve in the second lift event, wherein the fluid circuit includes a first fluid circuit valve which is arranged to be controlled by the first actuation arrangement. 1. A gas valve actuation device for an internal combustion engine , wherein the device comprisesfirst means for actuating two gas valves in a first lift event,second means for selectively actuating a first one of the two gas valves in a second lift event,a fluid circuit for controlling actuation of the first gas valve in the second lift event,wherein the fluid circuit comprises a first fluid circuit valve, which is arranged to be controlled by the first actuation means,wherein the first fluid circuit valve is arranged to be open when the two gas valves are not actuated for the first lift event and closed when the two gas valves are actuated for the first lift event, for creating conditions for achieving an exact positioning of the second actuation means an engaged state thereof.2. A device according to claim 1 , wherein the second actuation means comprises the fluid circuit.3. A device according to claim 1 , wherein the first actuation means comprises a first rocker arm for actuating the two gas valves in the first lift event claim 1 , and the second actuation means comprises a second rocker arm for actuating the first one of the two gas valves in the second lift event.4. A device according to claim 3 , wherein the first fluid circuit valve comprises a moveably arranged control member claim 3 , which is arranged in such a way in relation to the first rocker arm that it may be moved by a movement of the first rocker arm for opening and claim 3 , closing the valve.5. A device according to claim 4 , ...

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Номер записи: 34
12-03-2015 дата публикации

Variable cam phaser for automobile engine and controller therefor

Номер: US20150068477A1
Автор: Michihiro Kameda, Takumi Totsuka
Принадлежит: Nittan Valve Co Ltd

This invention provides an improved variable cam phaser for an automobile engine equipped with a controller capable of enabling execution of a given phase angle varying command in a shortened response time. The variable cam phaser has two control rotors which are arranged coaxial with a camshaft and rotatable relative to each other under the influence of two electromagnetic actuators and driven by the crankshaft of the engine. The variable cam phaser also has a relative phase angle varying mechanism for varying the relative phase angle of the camshaft relative to the crankshaft. When the two electromagnetic actuators are simultaneously energized, the two control rotors are held mutually unrotatable. However, when the braking torque of one actuator is reduced, the control rotor associated with that actuator is rotated relative to the other control rotor to immediately start the execution of the command.

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Номер записи: 35
15-03-2018 дата публикации

Method of Operating Internal Combustion Engine Having Increased Rich Limit for Dedicated EGR Cylinder

Номер: US20180073472A1
Автор: Cary A Henry
Принадлежит: Southwest Research Institute SwRI

A method of providing internal EGR to an engine having at least one dedicated EGR cylinder. The main (non dedicated) cylinders are operated with internal EGR, in addition to external EGR from the dedicated EGR cylinder. The dedicated EGR cylinder has separate valve control so that it need not be operated with internal EGR, thereby allowing it to be operated at a richer air-to-fuel ratio.

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Номер записи: 36
07-03-2019 дата публикации

ACTUATION APPARATUS FOR VARIABLE VALVE DRIVE

Номер: US20190072011A1
Автор: Cecur Majo, TOMISKA Lubos
Принадлежит:

An actuator for actuating valve-lift modes of a valve train assembly of an internal combustion engine, The valve train assembly is capable of being switched between a first valve-lift mode and a second valve-lift mode. The actuator includes a first body and a second body, The second body is mounted for reciprocal movement with respect to the first body between a first position to cause the first valve-lift mode and a second position to cause the second valve-lift mode. The actuator includes a third body supported by the second body, the third body for moving a first component of the valve train assembly to cause the second valve-lift mode, The third body is moveable relative to the second body. The actuator includes a first biaser for biasing the third body away from the second body towards the first component of the valve train assembly. 1. An actuator for actuating vale-lift modes of a valve train assembly of an internal combustion engine , the valve train assembly capable of being switched between a first valve-lift mode and a second valve-lift mode , the actuator comprising:a first body;a second body mounted for reciprocal movement with respect to the first body between a first position to cause the first valve-lift mode and a second position to cause the second valve-lift mode;a third body supported by the second body, the third body for moving a first component of the valve train assembly to cause the second valve-lift mode, wherein the third body is moveable relative to the second body; anda first biase for biasing the third body away from the second body towards the first component of the valve train assembly.2. The actuator according to claim 1 , wherein the actuator is configured such that in use claim 1 , the first position is away from the first component of the valve train assembly relative to the second position.3. The actuator according to claim 1 , wherein the third body is moveable between a third position and a fourth position relative to the ...

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Номер записи: 37
07-03-2019 дата публикации

MULTIFUNCTIONAL ENGINE BRAKE

Номер: US20190072012A1
Автор: Xi Yong, Yang Zhou, ZHU Rujie
Принадлежит: Shanghai Universoon Autoparts Co., Ltd.

A multifunctional engine brake, comprising an engine valve motion transformation mechanism, a slow seating mechanism (), and a timing oil control mechanism. By axially moving a roller () on a roller shaft (), the connections between the roller () and different cams () are switched, so as to implement the transformation between different engine valve motions. A roller axial driving mechanism () is disposed in the roller shaft (), thereby achieving a simple and compact structure, a symmetrical and reliable force, and easy manufacturing and assembling. The timing oil control mechanism provides timing oil supply or discharge for the engine brake, thereby eliminating the randomness of the opening or closing of a conventional engine brake, avoiding slipping and impact of the roller during roller translation, and improving the reliability and durability of the brake and engine. The slow seating mechanism () effectively reduces and controls the seating speed of the valve, thereby eliminating the compact within the mechanism. The brake can be used for different types of variable valve motions, comprising valve motions generating 4-stroke braking, 2-stroke braking, or 1.5-stroke braking. 115-. (canceled)16. A multifunctional engine brake comprising an engine valve motion conversion mechanism , wherein the engine valve motion conversion mechanism comprises camshaft , roller , roller shaft , roller shaft housing and an axial roller drive mechanism , wherein the camshaft has two or more different cams , wherein the roller shaft housing has a roller groove , wherein the two ends of the roller shaft are installed into the roller shaft housing , wherein the middle of the roller shaft spans the roller groove , wherein the length of the roller shaft in the roller groove is longer than the axial length of the roller , wherein the roller is arranged on the roller shaft in a rotatable way , wherein the roller is also slidable along the roller shaft , the roller has two or more axial ...

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Номер записи: 38
05-03-2020 дата публикации

METHOD FOR VERIFYING CVVD LOCATION LEARNING RESULT AND CVVD SYSTEM THEREOF

Номер: US20200072097A1
Автор: KOO Bon-Chang
Принадлежит:

A method for verifying a CVVD location learning result may include performing a learning value verification control by confirming a position of a control shaft connected to a motor with a signal value of an auxiliary cam sensor for a rotation of a camshaft if a controller determines that a learning value acquired in a short duration and a long duration of a CVVD system is desired to be verified. 1. A method for verifying a CVVD location learning result , comprising the steps of:determining by a controller whether a learning value acquired in a short duration and a long duration of a CVVD system is required to be verified; andperforming a learning value verification control by comparing a position of a control shaft connected to a motor with a signal value of an auxiliary cam sensor that detects rotation of a cam shaft.2. The method of claim 1 , wherein the auxiliary cam sensor is positioned at a middle portion of the cam shaft.3. The method of claim 1 , wherein the step of determining whether a learning value is required to be verified is based on conditions of each of a CVVD system hardware abnormality claim 1 , a learning value abnormality claim 1 , and a motor voltage abnormality claim 1 , and wherein the learning value verification control is performed when all the conditions are not satisfied claim 1 , and wherein it is determined that learning is abnormal when any one of the conditions is satisfied claim 1 , and upon determining a learning abnormality further comprising the step of switching from the learning value verification control to the re-learning control for learning each of the long duration and the short duration.4. The method of claim 3 , wherein the learning value verification control is divided into a long position verification control and a short position verification control claim 3 , and wherein in the long position verification control a signal value of the auxiliary cam sensor is applied to a threshold claim 3 , and wherein in the short ...

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Номер записи: 39
05-03-2020 дата публикации

METHOD OF CONTINUOUSLY VARIABLE VALVE DURATION POSITION LEARNING BASED ON CONDITIONAL APPLICATION AND CONTINUOUSLY VARIABLE VALVE DURATION SYSTEM THEREFOR

Номер: US20200072132A1
Автор: BYUN Jung-Sup, Woo Hee-Nam
Принадлежит:

A method of continuously variable valve duration (CVVD) location learning may include when a controller determines necessity of position learning for short duration and long duration of a CVVD system, performing conditional application re-learning control in which the position learning is performed in a situation in which validity determination of system environment condition for CVVD hardware and validity determination of vehicle environment condition for engine operation information of an engine are satisfied. 1. A method of continuously variable valve duration (CVVD) location learning , comprising:when a controller determines a need for position learning for short duration and long duration of a CVVD system, performing conditional application re-learning control in which the position learning is performed only in a situation in which validity determination of a system environment condition for CVVD hardware and validity determination of a vehicle environment condition for engine operation information of an engine are satisfied.2. The method of claim 1 , wherein the position learning is performed by determining necessity of a situation in which an existing learning value is not applicable due to replacement of the CVVD hardware.3. The method of claim 2 , wherein the replacement is a motor of the CVVD hardware.4. The method of claim 1 , wherein the position learning is performed by setting a Hall sensor claim 1 , a motor claim 1 , and a controller area network (CAN) claim 1 , which are applied as the CVVD hardware claim 1 , as a system environment condition factor and determining system environment condition validity according to a normal operation state of the system environment condition factor.5. The method of claim 4 , wherein the determination of the system environment condition validity is satisfied by setting a state of the hall sensor claim 4 , a state of the motor claim 4 , and a state of the CAN as selection conditions.6. The method of claim 5 , further ...

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Номер записи: 40
18-03-2021 дата публикации

Method for controlling lubrication of a connecting rod bearing

Номер: US20210079818A1
Автор: Arne Andersson, Bengt LASSESSON
Принадлежит: Volvo Truck Corp

The present invention relates to a method for controlling lubrication of a connecting rod bearing of an internal combustion engine arrangement. The method comprises the steps of controlling an inlet valve to be maintained in the closed position during a movement of the reciprocating piston from the top dead center during an intake stroke for a predetermined number of crank angle degrees; and positioning the inlet valve in the open position when the reciprocating piston has traveled the predetermined number of crank angle degrees from the top dead center, wherein lubricating medium is provided to the connecting rod bearing within a predetermined time period before the inlet valve is arranged in the open position.

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Номер записи: 41
14-03-2019 дата публикации

ELECTRIC PHASER WITH ORBITING ECCENTRIC GEARS

Номер: US20190078473A1
Автор: Brown Daniel, KAPELEVICH Alexander L.
Принадлежит:

A variable camshaft timing device () that adjusts phase between a camshaft and a crankshaft including a camshaft ring gear () having a plurality of radially-inwardly facing gear teeth () each of which has an involute gear tooth profile; a sprocket ring gear () axially spaced from the camshaft ring gear () having a plurality of radially-inwardly facing gear teeth () each of which has an involute gear tooth profile; a compound planetary gear () having a camshaft planetary gear () and a sprocket planetary gear () that each face radially outwardly and include a plurality of radially-outwardly facing gear teeth () having involute gear tooth profiles; and an eccentric shaft () that communicates rotational force from an electric motor () to the compound planetary gear () relatively displacing the camshaft ring gear () with respect to the sprocket ring gear (). 110. A variable camshaft timing device () that adjusts phase between a camshaft and a crankshaft , comprising:{'b': 22', '24, 'a camshaft ring gear (), configured to connect to the camshaft and rotate about a center axis (x), having a plurality of radially-inwardly facing gear teeth () each of which has an involute gear tooth profile;'}{'b': 14', '22', '18, 'a sprocket ring gear () axially spaced from the camshaft ring gear (), configured to receive rotational input from the crankshaft and rotate about the center axis (x), having a plurality of radially-inwardly facing gear teeth () each of which has an involute gear tooth profile;'}{'b': 26', '74', '72', '76', '78', '74', '22', '72', '14, 'a compound planetary gear () having a camshaft planetary gear () and a sprocket planetary gear () that each face radially outwardly and include a plurality of radially-outwardly facing gear teeth (, ) having involute gear tooth profiles, wherein the camshaft planetary gear () contacts the camshaft ring gear () and the sprocket planetary gear () contacts the sprocket ring gear (); and'}{'b': 28', '30', '26', '22', '14, 'an ...

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Номер записи: 42
23-03-2017 дата публикации

Method and device for diagnose of valves of an internal combustion engine

Номер: US20170081992A1
Автор: Mikael Nordin, Ola Stenlåås
Принадлежит: SCANIA CV AB

A method for diagnosis of at least one valve in at least one cylinder in a combustion engine comprising the steps, at a movement of a piston in said cylinder, of detecting movements propagating in a cylinder head of the cylinder or of parts adjacent thereto in the engine, comparing values resulting from the detection step with at least one stored setpoint value, and determining the state of said at least one valve, based on the result of said comparison.

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Номер записи: 43
21-03-2019 дата публикации

Switching rocker arm

Номер: US20190085732A1
Автор: James E. McCarthy, Jr., Matthew Vance
Принадлежит: Eaton Corp

A rocker arm assembly includes an outer arm having first and second low lift lobe contacting surfaces, an inner arm, and a latch assembly. The inner arm includes first and second opposed sidewalls extending between a first end and a second end, and a high lift lobe contacting surface disposed between the first and second opposed sidewalls. The first end is pivotably secured to the outer arm and operably associated with an engine valve, and the second end is operably associated with a lash adjuster and defining a latch bore. The latch assembly is movable between a first configuration and a second configuration. In the first configuration, the latch assembly engages the outer arm such that the outer arm rotates with the inner arm, and in the second configuration, the latch assembly disengages the outer arm such that the outer arm rotates independently from the inner arm.

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Номер записи: 44
21-03-2019 дата публикации

Control Device and Control Method for Vehicle Drive Mechanism

Номер: US20190085762A1
Автор: Okamoto Naoki, SHINOZAKI Yuya
Принадлежит:

The present invention relates to a control device and to a control method for a vehicle drive mechanism including a moving body having a movability range regulated by two stoppers, and a sensor which senses a position of the moving body. The control device of the present invention learns an output of the sensor corresponding to a contact state of a high-rigidity stopper, and limits, to a lower level, an operation variable of the actuator for moving the moving body toward a low-rigidity stopper along with an increase in an amount of change in the output of the sensor from the contact state of the high-rigidity stopper. Then, the control device learns the output of the sensor corresponding to the contact state of the low-rigidity stopper, and controls the actuator based on the output of the sensor learned at both the stopper positions. 1. A control device for a vehicle drive mechanism including a moving body which is movably supported , two stoppers , each of which defines an end of a movability range of the moving body , an actuator which drives the moving body in a moving direction , and a sensor which senses a position of the moving body , the control device comprising:a learning unit that learns an output of the sensor corresponding to a contact state of each of the two stoppers,wherein the learning unit executes learning for a first stopper of the two stoppers prior to learning for a second stopper of the two stoppers, the first stopper having a higher rigidity than the second stopper,wherein, while the moving body is brought into contact with the first stopper, an operation variable of the actuator is limited so as not to exceed a first upper limit value,wherein, while the moving body is brought into contact with the second stopper, the operation variable is limited so as not to exceed a second upper limit value, which is lower than the first upper limit value, andwherein, while the moving body rebounds off the second stopper and moves toward the first stopper, ...

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Номер записи: 45
30-03-2017 дата публикации

System for engine valve actuation comprising lash-prevention valve actuation motion

Номер: US20170089232A1
Автор: DONG Yang, Justin D. Baltrucki, Peter JO
Принадлежит: Jacobs Vehicle Systems Inc

A system for actuating engine valve comprises a main valve actuation motion source configured to supply main valve actuation motions to the at least one engine valve via a main motion load path, and an auxiliary valve actuation motion source separate from the main valve actuation motion source and configured to supply complementary auxiliary valve actuation motions to the at least one engine valve via an auxiliary motion load path. A lost motion component is configured, in one state, to maintain lash between the auxiliary valve actuation motion source and the auxiliary motion load path or within the auxiliary motion load path and, in another state, to take up this lash. The auxiliary valve actuation motion source is further configured to supply at least one lash-prevention valve actuation motion that substantially matches at least one of the main valve actuation motions.

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Номер записи: 46
01-04-2021 дата публикации

Variable travel valve apparatus for an internal combustion engine

Номер: US20210095614A1
Автор: Caleb ALVARADO, Charles Price, Christopher Wayne Turner, Clayton JACOBS, Daniel S. Pedersen, David Evans, Drew Cohen, Guy Robert Babbitt, Jay MCFARLANE, Kristina Weyer-Geigel, Nicholas Paul Echter, Stephen John Charlton, William Anderson
Принадлежит: JP Scope Inc

An apparatus includes a valve and an actuator. The valve has a portion movably disposed within a valve pocket defined by a cylinder head of an engine. The valve is configured to move relative to the cylinder head a distance between a closed position and an opened position. The portion of the valve defines a flow opening that is in fluid communication with a cylinder of an engine when the valve is in the opened position. The actuator is configured to selectively vary the distance between the closed position and the opened position.

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Номер записи: 47
28-03-2019 дата публикации

Variable displacement engine including different cam lobe profiles

Номер: US20190093525A1
Автор: Danny Nakhle, Kevin Shinners, Robert Stephen Furby
Принадлежит: FORD GLOBAL TECHNOLOGIES LLC

Methods and systems are provided for an engine including cams having different lobe profiles. In one example, cams of a first cam group drive a plurality of deactivatable cylinder valves and cams of a second cam group drive a plurality of non-deactivatable cylinder valves. The cams of the first cam group include a different lobe profile relative to cams of the second cam group.

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Номер записи: 48
12-04-2018 дата публикации

Method for controlling of valve timing of continuous variable valve duration engine

Номер: US20180100453A1
Автор: In Sang RYU, Kiyoung Kwon, Kyoung Pyo Ha, You Sang SON
Принадлежит: Hyundai Motor Co, Kia Motors Corp

A method for controlling intake and exhaust valves of an engine includes: Controlling opening and closing timings of the intake and exhaust valves by an intake continuous variable valve timing (CVVT) device and an exhaust CVVT devices; determining, by a controller, target intake and exhaust opening durations of the intake and exhaust valves, and target opening and closing timings of the valves based on an engine load and an engine speed; modifying current intake and exhaust opening durations based on the target opening durations via an intake continuous variable valve duration (CVVD) device and an exhaust CVVD device; adjusting opening or closing timings of the valves to the target opening or closing timings of the valves while maintaining the modified opening durations of the valves.

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Номер записи: 49
21-04-2016 дата публикации

Method and system for variable cam timing device

Номер: US20160108768A1
Автор: Ed Badillo, Jamie Charles Hanshaw, John Eric Rollinger, Paul A. Pietrzyk
Принадлежит: FORD GLOBAL TECHNOLOGIES LLC

Methods and systems are described for an engine with a cam torque actuated variable cam timing phaser. Phaser positioning control is improved by reducing inaccuracies resulting from inadvertent spool valve and/or phaser movement when the spool valve is commanded between regions. In addition, improved spool valve mapping is used to render phaser commands more consistent and robust.

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Номер записи: 50
21-04-2016 дата публикации

Valve opening/closing timing control device

Номер: US20160108769A1
Автор: Masaki Kobayashi, Yoshiaki Yamakawa
Принадлежит: Aisin Seiki Co Ltd

A valve opening/closing timing control device includes an advancing chamber and a retarding chamber between driving and driven rotating bodies, an intermediate locking mechanism performing switching between a locked state and an unlocked state, an advancing channel connected to the advancing chamber, a retarding channel connected to the retarding chamber, and at least one electromagnetic valve supplying/discharging working fluid to/from the advancing chamber, retarding chamber, and intermediate lock mechanism due to an electricity supply amount being changed. When working fluid is discharged from the intermediate lock mechanism, and working fluid is supplied to the advancing chamber and is discharged from the retarding chamber, the maximum working fluid flow amount through the advancing and retarding channels is greater than the maximum working fluid flow amount through the advancing and retarding channels when the electromagnetic valve is controlled such that the working fluid is supplied to the intermediate lock mechanism.

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Номер записи: 51
29-04-2021 дата публикации

Method and system for wear estimation

Номер: US20210123376A1
Автор: Jeffrey C. Krieger, Sravan K. Karri
Принадлежит: Caterpillar Inc

A method for estimating wear of at least one component of an internal combustion engine includes receiving sensor information and fuel commands indicative of an amount of fuel supplied to at least one combustion chamber of the internal combustion engine and determining an incremental increase in an amount of wear of at least one component of the internal combustion engine based on at least the sensor information and the fuel commands. The method also includes determining an updated amount of wear based on the incremental increase in the amount of wear, and outputting a notification indicative of the updated amount of wear.

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Номер записи: 52
28-04-2016 дата публикации

Method for actuating a camshaft

Номер: US20160115923A1
Автор: Thomas Herges
Принадлежит: ROBERT BOSCH GMBH

A method for actuating at least one camshaft, operable independently of a crankshaft, of an internal combustion engine includes: a) when the internal combustion engine is standing still, the at least one camshaft is actuated in such a way that a delivery stroke of a high-pressure pump of a high-pressure fuel injection device takes place; and b) during a subsequent reverse rotation of the at least one camshaft into the starting position, a quantity control valve of the high-pressure pump is not actuated.

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Номер записи: 53
27-04-2017 дата публикации

Sliding CAM Recovery From Short To Ground On Actuator Low Side

Номер: US20170114676A1
Автор: Douglas Scot A., Gady Kevin Andrew, MOON JOSEPH J., Verner Douglas R.
Принадлежит:

An engine control module includes at least one high side driver connected to at least one intake camshaft actuator and at least one exhaust camshaft actuator. A plurality of low side drivers is connected to the at least one intake camshaft actuator and the at least one exhaust camshaft actuator. A sliding camshaft control module selectively actuates the at least one high side driver and the plurality of low side drivers based on a status associated with the at least one intake camshaft actuator and/or the at least one exhaust camshaft actuator. 1. An engine control module comprising:at least one high side driver coupled to at least one intake camshaft actuator and at least one exhaust camshaft actuator;a plurality of low side drivers coupled to the at least one intake camshaft actuator and the at least one exhaust camshaft actuator; anda sliding camshaft control module that selectively actuates the at least one high side driver and the plurality of low side drivers based on a status associated with the at least one intake camshaft actuator and/or the at least one exhaust camshaft actuator.2. The engine control module of claim 1 , wherein the at least one high side driver includes a first high side driver and a second high side driver.3. The engine control module of claim 2 , wherein the status indicates a fault with the at least one intake camshaft actuator and/or the at least one exhaust camshaft actuator.4. The engine control module of claim 3 , wherein the fault indicates a short to ground.5. The engine control module of claim 3 , wherein the fault is associated with the first high side driver claim 3 , and wherein the sliding camshaft control module selectively commands the first high side driver to an off state while maintaining power to the second high side driver until a desired cam lift state is achieved.6. The engine control module of claim 1 , wherein the at least one intake camshaft actuator and the at least one exhaust camshaft actuator include ...

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Номер записи: 54
27-04-2017 дата публикации

ENGINE SYSTEM

Номер: US20170114729A1
Автор: Ashikaga Kensuke, Haizaki Yukio, Higashio Masayoshi, Tsuda Akira
Принадлежит:

An engine system includes: a hydraulic valve stop mechanism configured to switch states of an intake valve and exhaust valve of a same stopped cylinder; a hydraulic pressure changing device configured to change hydraulic pressure supplied to the valve stop mechanism; and a valve control portion configured to control the hydraulic pressure changing device. When a return from a reduced-cylinder operation to an all-cylinder operation is requested, and an engine revolution is less than a reference revolution, the hydraulic pressure is changed such that opening of one of the valves of the stopped cylinder able to restart at an earlier stage is first restarted. When the return is requested, and the engine revolution is not less than the reference revolution, the hydraulic pressure is changed such that opening of the exhaust valve of the stopped cylinder is restarted before opening of the intake valve. 1. An engine system comprising a plurality of cylinders each including an intake valve and an exhaust valve , an air-fuel mixture that is a mixture of air and a fuel being combusted in each of the plurality of cylinders ,the engine system configured to switch between an all-cylinder operation in which the air-fuel mixture is combusted in each of all the cylinders and a reduced-cylinder operation in which the air-fuel mixture is not combusted in a specific cylinder out of the plurality of cylinders, and the specific cylinder is set to a stop state,the engine system further comprising:a valve drive mechanism configured to open and close the intake and exhaust valves of the cylinders at respective predetermined timings;a hydraulic drive valve stop mechanism configured to perform switching between a state where each of the intake valve and exhaust valve of the specific cylinder is openable and closable at the predetermined timing by the valve drive mechanism and a state where each of the intake valve and exhaust valve of the specific cylinder is kept closed;a hydraulic pressure ...

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Номер записи: 55
13-05-2021 дата публикации

CONTROL DEVICE FOR ENGINE

Номер: US20210140378A1
Автор: Nishimoto Toshiaki, Nishio Takafumi, Okugawa Takaya, Yamamoto Takahiro
Принадлежит: MAZDA MOTOR CORPORATION

A control device for an engine including cylinders, and configured to perform a reduced-cylinder operation by idling some of cylinders. The control device includes a hydraulic valve-stopping mechanism which closes the intake and exhaust valves of the cylinders in response to establishment of the reduced-cylinder operation execution condition, a hydraulic variable valve timing mechanism capable of changing a phase of the exhaust valve of the engine , and an ECU which controls the valve-stopping mechanism and the hydraulic variable valve timing mechanism . In response to establishment of the reduced-cylinder operation execution condition, the ECU allows the hydraulic variable valve timing mechanism to execute the phase change to the exhaust valve , and subsequently allows the valve-stopping mechanism to bring the intake and exhaust valves of the cylinders into closed state. 1. A control device for an engine , the control device comprising:a hydraulic valve-stopping mechanism which holds an intake valve and an exhaust valve of at least an idle cylinder in a closed state in a reduced-cylinder operation, the control device being applicable to an engine including a plurality of cylinders, and configured to selectively execute a reduced-cylinder operation by setting at least one of the plurality of cylinders as the idle cylinder to be brought into an idle state, and an all-cylinder operation for operating all the cylinders;a hydraulic phase control mechanism which makes a phase of the intake valve or the exhaust valve of the engine variable; andprocessing circuitry configured to control the hydraulic valve-stopping mechanism and the hydraulic phase control mechanism, whereinin response to establishment of a reduced-cylinder operation execution condition as a condition for executing the reduced-cylinder operation, the processing circuitry allows the hydraulic phase control mechanism to execute a phase change to the intake valve or the exhaust valve, and subsequently, allows ...

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Номер записи: 56
05-05-2016 дата публикации

Method and system for preventing engine stall upon shorting of oil control valve

Номер: US20160123241A1
Автор: Jung Sup Byun, Seong Kyu Park
Принадлежит: Hyundai Motor Co

A method for preventing an engine stall upon a short of an oil control valve may include implementing, by a controller, an engine stall prevention control logic for increasing a rotation number of an engine to a set target value when a failure signal number of the oil control valve due to a short thereof exceeds a set reference value.

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Номер записи: 57
03-05-2018 дата публикации

Intermittent restart for automatic engine stop start system

Номер: US20180119662A1
Автор: Jordan Mosher, Michael D. GERTY, Sundeep S. Tuteja, Uday Vadlamani
Принадлежит: PACCAR INC

A disclosed method of automatically stopping and restarting a vehicle engine determines if one or more stop/start enablement condition has been met. If the stop/start enablement condition or conditions have been met, the method initiates an engine shutdown. If a restart request is made before the engine comes to a complete stop, an intermittent engine restart is initiated.

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Номер записи: 58
16-04-2020 дата публикации

Differential valve timing with twin-scroll turbines

Номер: US20200116078A1
Автор: Maqsood Rizwan ALI KHAN, Mark R. Claywell
Принадлежит: GM GLOBAL TECHNOLOGY OPERATIONS LLC

An internal combustion engine is configured to periodically open and close combustion chamber exhaust valves of the engine such that one exhaust valve is held open longer than another exhaust valve and/or one exhaust valve opens before another exhaust valve relative to top dead center. The resulting differential exhaust valve timing can at least partially compensate for different swallowing capacities of the scrolls of a twin-scroll turbine.

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Номер записи: 59
25-08-2022 дата публикации

Electric motor

Номер: US20220271612A1
Автор: Sandro Lauer
Принадлежит: Schaeffler Technologies AG and Co KG

The disclosure relates to an electric motor having a base motor module and an electronic module. The electronic module is electrically and mechanically connected to the base motor module and comprises a printed circuit board and an electronics housing. The electronics housing forms two supporting surfaces, with which the printed circuit board can be brought into contact.

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Номер записи: 60
01-09-2022 дата публикации

Method and Device for Checking the State of the Outlet Valves of an Engine of a Motor Vehicle

Номер: US20220275766A1
Автор: Braun Tobias, DINGL Jürgen
Принадлежит: Vitesco Technologies GmbH

Various embodiments of the teachings herein include methods for operating a motor vehicle having combustion chambers. The methods may include: closing the combustion chambers of the motor vehicle towards the exhaust tract by bringing outlet valves of the combustion chambers into the closed state; checking whether the outlet valves of the combustion chambers of the motor vehicle are in a closed state by evaluating the pressure prevailing in an intake pipe of the motor vehicle; and in the event one or more of the outlet valves are not in a closed state, initiating countermeasures to comply with emissions protocols. 1. A method for operating a motor vehicle having combustion chambers , the method comprising:closing the combustion chambers of the motor vehicle towards the exhaust tract by bringing outlet valves of the combustion chambers into the closed state;checking whether the outlet valves of the combustion chambers of the motor vehicle are in a closed state by evaluating the pressure prevailing in an intake pipe of the motor vehicle; andin the event one or more of the outlet valves are not in a closed state, initiating countermeasures to comply with emissions protocols.2. The method as claimed in claim 1 , wherein checking whether the outlet valves of the combustion chambers of the motor vehicle are in the closed state includes evaluating the pressure profile prevailing in the intake pipe of the motor vehicle.3. The method as claimed in claim 2 , further comprising:determining a mean pressure level from the pressure profile prevailing in the intake pipe of the motor vehicle; andcomparing the mean pressure level with a stored mean pressure level for normal operation of the motor vehicle.4. The method as claimed in claim 2 , wherein evaluating the pressure profile prevailing in the intake pipe of the motor vehicle includes:determining the peak pressure values of the pressure profile; andcomparing the determined peak pressure values with stored peak pressure values ...

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Номер записи: 61
02-05-2019 дата публикации

SYSTEM AND METHOD OF VALVE WEAR DETECTION

Номер: US20190128203A1
Автор: Kumar Chandan, Nandigama Pavan Chakravarthy, SHRIVASTAVA AMIT
Принадлежит:

A system includes a reciprocating engine having a piston disposed in a cylinder, an intake valve, an exhaust valve, and an exhaust flow path downstream of the exhaust valve. The system also includes a first sensor configured to obtain a first feedback indicative of an exhaust gas parameter in the exhaust flow path. The system also includes a controller configured to identify a valve wear condition of at least one of the intake valve or the exhaust valve at least partially based on the first feedback from the first sensor. 1. A system , comprising:a reciprocating engine having a piston disposed in a cylinder, an intake valve, an exhaust valve, and an exhaust flow path downstream of the exhaust valve;a first sensor configured to obtain a first feedback indicative of an exhaust gas parameter in the exhaust flow path; anda controller configured to identify a valve wear condition of at least one of the intake valve or the exhaust valve at least partially based on the first feedback from the first sensor, wherein the controller is configured to correlate the valve wear condition specifically to one valve of the intake valve or the exhaust valve.2. The system of claim 1 , wherein the exhaust gas parameter comprises an exhaust gas composition.3. The system of claim 2 , wherein the first sensor comprises an oxygen sensor claim 2 , a fuel sensor claim 2 , or a combination thereof.4. The system of claim 2 , comprising a second sensor configured to obtain a second feedback indicative of an exhaust temperature in the exhaust flow path claim 2 , wherein the controller is configured to identify the valve wear condition of at least one of the intake valve or the exhaust valve at least partially based on the first feedback from the first sensor and the second feedback from the second sensor.5. The system of claim 4 , comprising a third sensor configured to obtain a third feedback indicative of an exhaust pressure in the exhaust flow path claim 4 , wherein the controller is ...

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Номер записи: 62
19-05-2016 дата публикации

SYSTEMS, METHODS, AND DEVICES FOR VALVE STEM POSITION SENSING

Номер: US20160138484A1
Автор: Hildebrandt Mark William, Nielsen Douglas John
Принадлежит:

A linear variable differential transformer (LVDT) for monitoring engine valve position is disclosed. The system includes a valve guide having an elongated recess through it. The engine valve has a valve head and a valve stem with two adjacent materials having different magnetic properties meeting at an interface. The valve stem fits and moves linearly within the valve guide, and the valve head closes an engine combustion chamber. It also includes monitoring coils within the valve guide that create a signal related to the position of the interface within the valve guide. An engine control unit (ECU) is coupled to the monitoring coils and receives and analyzes the signal from the monitoring coils to determine operation of the valve. 1. A system for measuring a position of a valve in an internal combustion engine , the system comprising:a valve guide having a central recess with a constant diameter passing through a length of the valve guide, 'a valve stem including a first section having a first magnetic property adjacent to a second section having a second magnetic property and an interface between the first section and the second section, the first section, the second section and the interface comprising a single outer diameter less than the constant diameter of the valve guide,', 'wherein the valve of the internal combustion engine comprises 'a linear variable differential transformer (LVDT) located around the valve stem and adapted to generate a signal indicating motion of the valve stem,', 'wherein the valve stem is received by the central recess and the valve stem is adapted to move linearly through the central recess; and'}wherein the valve guide has an external recess and wherein windings of the LVDT are positioned within the external recess of the valve guide.2. The system of claim 1 , wherein the first section comprises an armature.3. The system of wherein a location of the interface on the valve stem is selected and the LVDT position is selected to surround ...

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Номер записи: 63
28-05-2015 дата публикации

METHOD AND DEVICE FOR OPERATING AN INTERNAL COMBUSTION ENGINE

Номер: US20150144113A1
Автор: BETHMANN Andreas, DRUNG Michael, KROENER Martin, MAIER Rainer, MERKLE Sven, PFAU Matthias, SIMONS Matthias
Принадлежит:

A method for operating an internal combustion engine is described, the internal combustion engine including a cylinder having an inlet valve for supplying fresh air from an intake manifold in a controlled manner, an air filling being set in a certain operating mode by predefining a closing point in time of the inlet valve in an intake stroke at a constant intake manifold pressure. 1. A method for operating an internal combustion engine , wherein the internal combustion engine includes a cylinder having an inlet valve for supplying fresh air from an intake manifold in a controlled manner , the method comprising:setting a desired air filling in a certain operating mode by predefining a closing point in time of an inlet valve in an intake stroke at a constant intake manifold pressure.2. The method as recited in claim 1 , wherein the certain operating mode is determined through a range of air fillings to be set in the cylinder.3. The method as recited in claim 1 , wherein the closing point in time of the inlet valve is set in the cylinder in the certain operating mode to a range between 70° KW and 180° KW after a top dead center of a piston movement.4. The method as recited in claim 1 , wherein the constant intake manifold pressure in the certain operating mode is set by controlling a position of a throttle valve.5. The method as recited in claim 1 , wherein the closing point in time of the inlet valve is set with the aid of a camshaft phase adjuster.6. The method as recited in claim 1 , wherein the internal combustion engine is operated in an intake manifold operating mode when the air filling to be set is below a first predefined air filling threshold value claim 1 , the air filling being set in the intake manifold operating mode by controlling a throttle valve claim 1 , and the closing point in time of the inlet valve being optimized according to at least one of a smooth running and fuel consumption of the internal combustion engine claim 1 , and the certain ...

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Номер записи: 64
18-05-2017 дата публикации

CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINE AND METHOD OF CONTROLLING INTERNAL COMBUSTION ENGINE

Номер: US20170138275A1
Автор: KANEKO Masaaki, TAKAGI Noboru, Uchiyama Yoshinobu
Принадлежит:

A control device for an internal combustion engine includes an ECU. The internal combustion engine includes an oil pump, a crankshaft, a camshaft, and a variable valve timing mechanism. The ECU is configured to: calculate a required engine torque, which is an engine torque requested by a driver, based on accelerator operation amount information; calculate a future target phase of the variable valve timing mechanism based on a rotational speed of the internal combustion engine and the required engine torque; calculate an anticipated deviation that is a difference between the future target phase and a current actual phase; and control a discharge amount of oil from the oil pump based on the anticipated deviation. 2. The control device according to claim 1 , wherein the electronic control unit is configured to increase the discharge amount of oil as the anticipated deviation is greater.3. The control device according to claim 1 , wherein calculate a current target phase based on the rotational speed and a load factor of the internal combustion engine;', 'calculate an actual deviation that is a difference between the current target phase and the current actual phase; and', 'control the discharge amount of oil from the oil pump based on the greater of the anticipated deviation and the actual deviation., 'the electronic control unit is configured to The disclosure of Japanese Patent Application No. 2015-225599 filed on Nov. 18, 2015 including the specification, drawings and abstract is incorporated herein by reference in its entirety.1. Technical FieldThe disclosure relates to a control device for an internal combustion engine, and relates also to a method of controlling an internal combustion engine.2. Description of Related ArtJapanese Patent Application Publication No. 2015-45287 (JP 2015-45287 A) describes an internal combustion engine mounted in a vehicle and provided with an oil pump configured to vary a discharge amount of oil, and variable valve timing mechanisms ...

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Номер записи: 65
08-09-2022 дата публикации

Engine

Номер: US20220282686A1
Автор: Mitsunori Wasada, Naohiro Yamaguchi, Satoshi Imamura, Toshimasa KOTANI
Принадлежит: Mazda Motor Corp

An engine is provided, which includes an engine body including a plurality of cylinders, each of the cylinders being provided with an intake port, an exhaust port, an intake valve, and an exhaust valve, an intake passage and an exhaust passage connected to the engine body, and a turbocharger including a turbine provided to the exhaust passage and a compressor provided to the intake passage. A geometric compression ratio of the cylinder is 11:1 or higher. An open period of the intake valve is a range of 270° or larger by a crank angle. The exhaust passage includes a plurality of independent exhaust passages, each communicating with the exhaust port of one cylinder or with the exhaust ports of two or more cylinders of which timings of exhaust strokes are discontinuous from each other, and connecting the engine body to the turbine.

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Номер записи: 66
30-04-2020 дата публикации

Rocker arm

Номер: US20200131947A1
Автор: Majo Cecur
Принадлежит: Eaton Intelligent Power Ltd

A dual body rocker arm for a valve train assembly of an internal combustion engine includes: an outer body having a protrusion; an inner body connected to the outer body and arranged for pivotal movement relative to the outer body about an axis between a first position and a second position; and a torsional biasing element supported by the protrusion and arranged to bias the inner body relative to the outer body towards one of the first position and the second position. The protrusion is formed integrally with the outer body.

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Номер записи: 67
30-04-2020 дата публикации

Rocker arm

Номер: US20200131948A1
Автор: Majo Cecur
Принадлежит: Eaton Intelligent Power Ltd

A dual body rocker arm for controlling a valve of a cylinder of an internal combustion engine includes: a first body; a second body; and a latching arrangement moveable to latch and unlatch the first body and the second body. The latching arrangement includes: a latch pin moveable between a first position in which the latch pin latches the first body and the second body together and a second position in which the first body and the second body are un-latched; and a lever mounted for pivotal motion relative to the first body, a first end of the lever contacting the latch pin, and a second end of the lever configured to contact an actuation arrangement. In use, when the actuation arrangement exerts a force on the second end of the lever, the lever pivots such that the first end of the lever exerts a force on the latch pin.

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Номер записи: 68
30-04-2020 дата публикации

Methods of setting a tappet in an engine

Номер: US20200131950A1
Автор: Bartley K. Merriam, Richard Moldas
Принадлежит: Honda Motor Co Ltd

A method of setting a tappet in an engine. The method includes setting a crankshaft at a predetermined crankshaft rotation angle. A cam coupled to the crankshaft is configured to provide cam lobe lift when the crankshaft is set at the predetermined crankshaft rotation angle. The cam lobe lift translates a tappet screw, coupled to the cam, towards a valve by a distance less than a gap defined between the valve and the tappet screw. The method also includes adjusting the tappet screw such that a zero gap tappet clearance is defined between the valve and the tappet screw.

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Номер записи: 69
26-05-2016 дата публикации

Camshaft assembly for an internal combustion engine

Номер: US20160146062A1
Автор: Alan W. Hayman, Robert S. McAlpine
Принадлежит: GM GLOBAL TECHNOLOGY OPERATIONS LLC

A camshaft assembly for an internal combustion engine includes a camshaft, a first lobe set, and a second lobe set, extending along, and rotatable about, a cam axis. The first lobe set includes a first, second, and third lobe. The second lobe set includes a first and second lobe. The first lobe set is movable along the cam axis between a first, second, and third position. The second lobe set is movable along the cam axis between a first and second position. The first and second position of each of the first and second lobe sets corresponds to lift of a respective valve stem in the engine. The third position of the first lobe set corresponds to zero lift of the respective valve stem to provide cylinder deactivation of a corresponding cylinder within the engine.

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Номер записи: 70
25-05-2017 дата публикации

TWO-STEP VALVETRAIN PREPOSITION CONTROL STRATEGY

Номер: US20170145927A1
Автор: Bayer Ethan E., Bucknell John R., Ismail Aymail, Mavalankar Drushan
Принадлежит:

A control technique for an engine having a two-step variable valve lift system includes a controller receiving a pressure in an intake manifold of the engine from a manifold absolute pressure (MAP) sensor and a position of an EGR valve of the engine from an exhaust gas recirculation (EGR) sensor. In response to the controller detecting an upcoming HL-to-LL valve state transition, a set of airflow actuators of the engine is controlled, based on the intake manifold pressure and the EGR valve position, to generate a first torque reserve. In response to generating the first torque reserve, the controller then commands the HL-to-LL transition and depletion of the first torque reserve during the HL-to-LL transition to mitigate torque disturbance associated with this transition. 1. A control system for an engine having a two-step variable valve lift (VVL) system , the control system comprising:a manifold absolute pressure (MAP) sensor configured to measure a pressure in an intake manifold of the engine;an exhaust gas recirculation (EGR) valve position sensor configured to measure a position of an EGR valve of the engine; and based on the intake manifold pressure and the EGR valve position, control a set of airflow actuators of the engine to generate a first torque reserve, and', 'in response to generating the first torque reserve, (i) command the HL-to-LL transition and (ii) deplete the first torque reserve during the HL-to-LL transition to mitigate torque disturbance associated with the HL-to-LL transition., 'a controller configured to detect an upcoming high lift to low lift (HL-to-LL) valve state transition and, in response to detecting the upcoming HL-to-LL valve state transition2. The control system of claim 1 , wherein the set of airflow actuators include a throttle valve of the engine and the EGR valve.3. The control system of claim 2 , wherein the set of airflow actuators further includes intake and exhaust camshaft phasers.4. The control system of claim 1 , ...

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Номер записи: 71
02-06-2016 дата публикации

Continuous variable valve duration apparatus and control method using the same

Номер: US20160153324A1
Автор: Back Sik Kim, In Sang RYU, Ingee Suh, Kiyoung Kwon, Kyoung Pyo Ha
Принадлежит: Hyundai Motor Co

A control method using a continuous variable duration apparatus provided to adjust opening duration of an intake valve of an engine may include: setting a desired deceleration speed when a vehicle starts decelerating, determining a pumping loss by the engine that is required for the desired deceleration speed, setting desired duration for the required pumping loss by the engine, and controlling duration of the intake valve on the basis of the set desired duration.

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Номер записи: 72
17-06-2021 дата публикации

Valve actuation system comprising in-series lost motion components for use in cylinder deactivation and auxiliary valve actuations

Номер: US20210180481A1
Автор: G. Michael Gron, Jr., Justin D. Baltrucki
Принадлежит: Jacobs Vehicle Systems Inc

A valve actuation system comprises a valve actuation motion source configured to provide a main valve actuation motion and an auxiliary valve actuation motion for actuating at least one engine valve via a valve actuation load path. A lost motion subtracting mechanism is arranged in the valve actuation load path and configured, in a first default operating state, to convey at least the main valve actuation motion and configured, in a first activated state, to lose the main valve actuation motion and the auxiliary valve actuation motion. Additionally, a lost motion adding mechanism configured, in a second default operating state, to lose the auxiliary valve actuation motion and configured, in a second activated state, to convey the auxiliary valve actuation motion, wherein the lost motion adding mechanism is in series with the lost motion subtracting mechanism in the valve actuation load path at least during the second activated state.

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Номер записи: 73
01-06-2017 дата публикации

Valve device for internal combustion engine

Номер: US20170152771A1
Автор: Atsuhisa TAMANO, Toru Sakuma, Toshiyuki Yano, Yuta Nishimura, Yuu Yokoyama
Принадлежит: Toyota Motor Corp

A first swing arm of each cylinder is swung by a fixed cam of an intake camshaft, so as to operate a first intake valve according to a profile thereof. A second swing arm is swung by a second cam and its swing range is changed by a variable mechanism. Hereby, a lift amount of a second intake valve changes continuously. The second cam is selected from a plurality of cams on a cam piece provided around the intake camshaft.

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Номер записи: 74
08-06-2017 дата публикации

Central locking for a camshaft adjuster

Номер: US20170159579A1
Автор: Michael Busse
Принадлежит: Schaeffler Technologies AG and Co KG

A hydraulic camshaft adjuster for changing the control times of gas exchange valves of an internal combustion engine, designed as a vane cell camshaft adjuster. A control device inserted in the vane selectively opens and interrupts a flow connection between the working chambers. A locking device prevents relative motion between the rotor and the stator in that the rotor is fastened to the stator at a vane position. A switching valve, which has three working ports, a P port and a T port, can be moved into different control positions by an adjusting element,—wherein in the control position, the P port communicates with the working chambers via the A port, the B port is blocked at the switching valve, and the T port communicates with the control device of the vanes via the C port. In a control position provided as a starting strategy for the switching valve the A port communicates with the P port and the working chambers, the B port communicates with the T port and the working chambers, and the C port communicates with the control device of the vanes and the T port.

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Номер записи: 75
24-06-2021 дата публикации

ACTUATION ARRANGEMENT FOR ACTUATING A LATCH IN A SWITCHABLE ROCKER ARM AND A VALVE TRAIN COMPRISING THE SAME

Номер: US20210189917A1
Автор: Andrisani Nicola, LORENZON Alessio, RAIMONDI Emanuele
Принадлежит:

A valve train assembly includes: at least one dual body rocker arm having a first body, a second body, and a latching arrangement for latching and unlatching the first body and the second body, the latching arrangement being biased to an unlatched configuration; and an actuator arrangement external to the rocker arm for controlling the latching arrangement, the actuator arrangement being arranged so that a default setting thereof is to cause the latching arrangement to be in a latched configuration. 1. A valve train assembly , comprising:at least one dual body rocker arm comprising a first body, a second body,a latching arrangement configured to latch and unlatch the first body and the second body, the latching arrangement being biased to an unlatched configuration; andan actuator arrangement external to the rocker arm configured to control the latching arrangement, the actuator arrangement being configured so that a default setting thereof is to cause the latching arrangement to be in a latched configuration.2. The valve train assembly according to claim 1 , wherein the actuator arrangement comprises and actuator and a shaft rotatable by the actuator claim 1 , the shaft comprising a component configured to operate the latching arrangement.3. The valve train assembly according to claim 2 , wherein the component comprises a selector cam rotatable to operate the latching arrangement.4. The valve train assembly according to claim 3 , wherein the selector cam comprises a lobe profile and a base circle.5. The valve train assembly according to claim 4 , wherein the actuator is arranged to rotate the shaft between a first configuration in which the lobe profile acts on the latching arrangement causing the latching arrangement to be in the latched configuration claim 4 , and a second configuration in which the lobed profile does not act on the latching arrangement thereby allowing the latching arrangement to be in the unlatched configuration claim 4 , the first ...

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Номер записи: 76
24-06-2021 дата публикации

VALVE OPENING AND CLOSING TIMING CONTROL DEVICE

Номер: US20210189918A1
Автор: Kobayashi Masaki, Noguchi Yuji, UEDA Kazuo
Принадлежит: AISIN SEIKI KABUSHIKI KAISHA

A valve opening and closing timing control device includes: a drive-side rotary body rotating synchronously with a crankshaft; a driven-side rotary body arranged coaxially with the drive-side rotary body and rotating integrally with a valve opening and closing camshaft; a fluid pressure chamber defined between the drive-side and driven-side rotary bodies; advance and retard chambers defined by partitioning the fluid pressure chamber; an intermediate lock mechanism selectively switches between a lock state and a lock release state; advance and retard flow paths allowing a flow of the working fluid to be supplied to and discharged from the advance and retard chambers; a control valve including a spool; and a phase control unit moving a position of the spool by controlling a power supply amount to the control valve to supply and discharge the working fluid to and from the advance and retard chambers to displace a relative rotation phase. 1. A valve opening and closing timing control device comprising:a drive-side rotary body that rotates synchronously with a crankshaft of an internal combustion engine;a driven-side rotary body that is arranged coaxially with a rotation axis of the drive-side rotary body and that rotates integrally with a valve opening and closing camshaft of the internal combustion engine;a fluid pressure chamber defined between the drive-side rotary body and the driven-side rotary body;an advance chamber and a retard chamber defined by partitioning the fluid pressure chamber with a partition portion provided in at least one of the drive-side rotary body and the driven-side rotary body;an intermediate lock mechanism that selectively switches between a lock state in which a relative rotation phase of the driven-side rotary body with respect to the drive-side rotary body is restrained to an intermediate lock phase between a most advanced phase and a most retarded phase and a lock release state in which the restraint of the intermediate lock phase is ...

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Номер записи: 77
24-06-2021 дата публикации

Method and Device for Actuating a Camshaft Adjuster

Номер: US20210189919A1
Автор: Burkhardt Thomas, Kim Suk-Ju, Stowasser Wolfgang
Принадлежит: Vitesco Technologies GmbH

Various embodiments include a method for actuating a camshaft adjuster of an internal combustion engine, in which a current is generated in an electric motor of the camshaft adjuster comprising: measuring an instantaneous strength of the current; calculating a mean value of the measured strength of the current over a predefined elapsed time; measuring a temperature of the camshaft adjuster; comparing the mean value of the measured strength of the current to a threshold value obtained from a characteristic diagram stored in a memory based on the measured temperature and the predefined elapsed time; and reducing the current if the calculated mean value of the strength of the current is higher than the threshold value. 1. A method for actuating a camshaft adjuster of an internal combustion engine , in which a current is generated in an electric motor of the camshaft adjuster , the method comprising:measuring an instantaneous strength of the current;calculating a mean value of the measured strength of the current over a predefined elapsed time;measuring a temperature of the camshaft adjuster;comparing the mean value of the measured strength of the current to a threshold value obtained from a characteristic diagram stored in a memory based on the measured temperature and the predefined elapsed time; andreducing the current if the calculated mean value of the strength of the current is higher than the threshold value.2. The method as claimed in claim 1 , further comprising reducing the instantaneous strength of the current until the mean value is lower than the threshold value.3. The method as claimed in claim 1 , wherein the temperature comprises an engine block temperature or an oil temperature.4. The method as claimed in claim 1 , wherein reducing the instantaneous strength of the current includes using a predefined static setpoint value for the camshaft position.5. The method as claimed in claim 1 , wherein reducing the instantaneous strength of the current includes ...

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Номер записи: 78
14-06-2018 дата публикации

Electrically Latching Rocker Arm Assembly Having Built-In OBD Functionality

Номер: US20180163577A1
Автор: Busdiecker Matthew Richard, Gillette Nicholas Peter, Hughes Douglas Anthony, JR. James Edward, JUDS MARK ALLAN, McCarthy
Принадлежит: EATON CORPORATION

An internal combustion engine includes a cam-actuated rocker arm assembly with a solenoid-actuated latch that provides for cylinder deactivation or variable valve actuation. The solenoid is in a position where its inductance varies significantly in relation to the position of a latch pin as it translates between latching and non-latching configurations. A sensor is positioned to monitor a current or a voltage in a circuit that includes the solenoid. The sensor data is analyzed to provide diagnostic information relating to the operation of the rocker arm assembly. 1. An internal combustion engine , comprising:a cylinder head;a poppet valve having a seat formed in the cylinder head;a cam shaft on which a cam is mounted;a rocker arm assembly comprising a rocker arm, a latch pin, and a cam follower configured to engage the cam as the cam shaft rotates, wherein the latch pin is moveable between first and second positions;a solenoid mounted in a configuration that causes one of its electrical response characteristics to vary significantly in relation to the latch pin's position as it translates between the first and second positions;a sensor positioned and operative to measure a current or voltage in a circuit comprising the solenoid; anda processor programmed to analyze data from the sensor to obtain diagnostic information relating to the state of the rocker arm assembly;wherein one of the first and second latch pin positions provides a configuration in which the rocker arm assembly is operative to actuate the poppet valve in response to rotation of the cam shaft to produce a first valve lift profile; andthe other of the first and second latch pin positions provides a configuration in which the rocker arm assembly is operative to actuate the poppet valve in response to rotation of the cam shaft to produce a second valve lift profile, which is distinct from the first valve lift profile, or the poppet valve is deactivated.2. An internal combustion engine according to claim ...

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Номер записи: 79
15-06-2017 дата публикации

METHOD FOR CONTROLLING OF VALVE TIMING OF CONTINUOUS VARIABLE VALVE DURATION ENGINE

Номер: US20170167318A1
Автор: HA Kyoung Pyo, Kwon Kiyoung, RYU In Sang, SON You Sang
Принадлежит: HYUNDAI MOTOR COMPANY

A system and a method for controlling valve timing of a continuous variable valve duration engine that simultaneously controls duration and timing of the valve by mounting a continuous variable valve duration device on an intake of turbo engine and mounting a continuous variable valve timing device on an exhaust is disclosed. The method includes: classifying a plurality of control regions depending on engine speed and load; applying a maximum duration to an intake valve and limiting an overlap to an exhaust valve; applying the maximum duration to the intake valve and adjusting the overlap by using an exhaust valve close timing; advancing an intake valve close timing; approaching an intake valve close timing to bottom dead center; controlling a wide open throttle valve and controlling the intake valve close timing to after bottom dead center; and controlling the wide open throttle valve and advancing the intake valve close timing. 1. A method for controlling valve timing of a turbo engine provided with a continuous variable valve duration (CVVD) device at an intake and a continuous variable valve timing (CVVT) device at an exhaust , the method comprising:Classifying a plurality of control regions depending on an engine speed and an engine load;applying a maximum duration to an intake valve and limiting an overlap to an exhaust valve in a first control region;applying the maximum duration to the intake valve and adjusting the overlap by using an exhaust valve close (EVC) timing in a second control region;advancing an intake valve close (IVC) timing in a third control region;approaching the intake valve close (IVC) timing to bottom dead center in a fourth control region;controlling a wide open throttle valve (WOT) and controlling the intake valve close (IVC) timing to after bottom dead center in a fifth control region; andcontrolling the wide open throttle valve and advancing the intake valve close (IVC) timing in a sixth control region.2. The method of claim 1 , ...

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Номер записи: 80
15-06-2017 дата публикации

System and method for controlling valve timing of continuous variable valve duration engine

Номер: US20170167409A1
Автор: In Sang RYU, Kiyoung Kwon, Kyoung Pyo Ha, You Sang SON
Принадлежит: Hyundai Motor Co

The present disclosure provides a system and a method for controlling valve timing of a continuous variable valve duration engine. The method may include: classifying a plurality of control regions depending on an engine speed and an engine load; applying a maximum duration to an intake valve and controlling a valve overlap between the intake valve and an exhaust valve in a first control region; maintaining the maximum duration of the intake valve and applying a maximum duration to the exhaust valve in a second control region; maintaining a manifold absolute pressure (MAP) at a predetermined pressure in a third control region; controlling a throttle valve to be fully opened and generating the valve overlap in a fourth control region; and controlling the throttle valve to be fully opened and controlling intake valve closing (IVC) timing according to the engine speed in a fifth control region.

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Номер записи: 81
15-06-2017 дата публикации

Method of controlling continuously variable valve timing system for limp-home

Номер: US20170167410A1
Автор: Sung Joo Kim
Принадлежит: Hyundai Motor Co, Kia Motors Corp

A method of controlling a continuously variable valve timing system, may include determining whether there is an error of a position of a cam, performing a passive control based on a value learned about a position of the cam during previous driving when it is determined that there is an error of the position of the cam, determining whether a motion of the continuously variable valve timing system is stopped while the passive control is performed based on the value learned about the position of the cam during the previous driving, learning the stopping position of the continuously variable valve timing system when it is determined that the motion of the continuously variable valve timing system is stopped, and learning a position for limp-home of the continuously variable valve timing system and then controlling the continuously variable valve timing system to the learned position for the limp-home.

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Номер записи: 82
29-09-2022 дата публикации

CONTROL DEVICE AND METHOD FOR CONTROLLING A COMPRESSION RELEASE BRAKE ARRANGEMENT FOR AN ENGINE

Номер: US20220307430A1
Автор: EKMAN Mats, ERSVIK Erik, GÖRANSSON Hans, HÖCKERDAL Erik, KJELLSTRÖM Lars-Göran, SOMMANSSON Joakim
Принадлежит: SCANIA CV AB

A control device and method for controlling a compression release brake arrangement is provided. The compression release brake arrangement comprises an exhaust valve actuator assembly, a first actuator valve and a second actuator valve. The method comprises controlling the first and second actuator valves to a first state in which one of the actuator valves is open and the other one is closed. The disclosure further relates to a computer program, a computer readable medium, as well as to a vehicle comprising the control device. 1. A method for controlling a compression release brake arrangement for an engine the compression release brake arrangement comprising:an exhaust valve actuator assembly configured to, when activated, perform compression release braking of at least a first cylinder of the engine;a conduit fluidly connected to the exhaust valve actuator assembly; the conduit comprising a first actuator valve and a second actuatorvalve, the second actuator valve arranged in parallel to the first actuator valve; andat least one pump configured to supply hydraulic fluid via the conduit to the exhaust valve actuator assembly; the method performed by a control device and comprising:in advance of an activation of the exhaust valve actuator assembly, controlling the first actuator valve and the second actuator valve so as to achieve a first state in which one of the first actuator valve and the second actuator valve is in an open state whereas the other one of the first and the second actuator valves is in a closed state.2. The method according to claim 1 , further comprising:after controlling the first actuator valve and the second actuator valve so as to achieve the first state, controlling the first actuator valve and the second actuator valve so as to achieve a second state in which both the first actuator valve and the second actuator valve are in a closed state.3. The method according to claim 1 , wherein controlling the first actuator valve and the second ...

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Номер записи: 83
21-06-2018 дата публикации

VARIABLE VALVE ACTUATOR HAVING LOW-PRESSURE RELIEF

Номер: US20180171881A1
Автор: SCHREADER Kevin James, Yacoub Victor Iskander, YEAGER Kendall Dean
Принадлежит: CATERPILLAR INC.

A valve actuation system is disclosed for an engine. The valve actuation system may have a variable valve actuator that is configured to engage a rocker arm and hold the valve at an open position regardless of motion of a cam lobe. The variable valve actuator may have a housing forming a chamber, a plunger disposed in the chamber, a control valve movable to control a flow of fluid into the chamber, and a relief valve configured to automatically open and release fluid from the housing when a pressure inside the chamber is below a predetermined pressure. The valve actuation system may further have a controller configured to cycle the control valve prior to start-up of the engine and to selectively move the control valve after start-up. 1. A valve actuation system for an engine , comprising:a cam follower configured to ride on and move in accordance with a profile of a cam lobe;a rocker arm having a first end operatively connected to the cam follower;a valve operatively connected to a second end of the rocker arm; a housing forming a chamber;', 'a plunger disposed in the chamber;', 'a control valve movable to control a flow of fluid into the chamber; and', 'a relief valve configured to automatically open and release fluid from the housing when a pressure inside the chamber is below a predetermined pressure value; and, 'a variable valve actuator configured to engage the rocker arm and hold the valve at an open position regardless of motion of the cam lobe, wherein the variable valve actuator comprisesa controller configured to cycle the control valve prior to start-up of the engine and to selectively move the control valve after start-up.2. The valve actuation system of claim 1 , wherein the variable valve actuator includes a damper configured to absorb shock loading from the fluid.3. The valve actuation system of claim 1 , wherein the predetermined pressure value is about 50 kpa.4. The valve actuation system of claim 1 , further including a source configured to provide ...

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Номер записи: 84
28-06-2018 дата публикации

System and method for adjusting exhaust valve timing

Номер: US20180179962A1
Автор: Brien Lloyd Fulton, Eric Matthew Kurtz
Принадлежит: FORD GLOBAL TECHNOLOGIES LLC

Methods and systems for adjusting exhaust valve timing of an engine are described. In one example, exhaust valve timing of a compression ignition engine is adjusted responsive to a difference between a commanded exhaust valve opening timing and an actual exhaust valve opening timing, the actual exhaust valve opening timing determined from cylinder pressure.

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Номер записи: 85
13-06-2019 дата публикации

VARIABLE VALVE TRAIN OF AN INTERNAL COMBUSTION ENGINE

Номер: US20190178116A1
Автор: Elendt Harald, Schott Dimitri
Принадлежит: SCHAEFFLER TECHNOLOGIES AG & CO. KG

A variable valve train with at least two functionally identical gas-exchange valves per cylinder, having primary cam and a secondary cam generated valve strokes that are transmitted by a switchable cam follower selectively to the gas-exchange valves. The respective cam follower has a primary lever in tapping contact with the primary cam and in switching contact with the gas-exchange valve and a secondary lever that is in tapping contact with the secondary cam and is coupleable with the primary lever by a control pin. The respective control pins are connected by connecting elements to respective first and second elongated switching elements, which are arranged above the cam followers parallel to the camshaft and are displaceable longitudinally by a linear actuator from a home into a switched position. The control pins of the cam follower of functionally identical gas-exchange valves are in switching connection with a respective one of the first and second elongated switching elements for common movement. 14. A variable valve train () of an internal combustion engine with at least two functionally identical gas-exchange valves per cylinder , the variable valve train comprising:a camshaft with primary cams and secondary cams that are adapted to generate valve strokes;switchable cam followers that selectively transmit the valve strokes to associated ones of the gas-exchange valves;respective ones of the switchable cam followers have a primary lever in tapping contact with an associated one of the primary cams and in switching contact with an associated one of the gas-exchange valves and a secondary lever in tapping contact with an associated one of the secondary cams;control pins that are adapted to couple respective ones of the secondary levers with an associated one of the primary levers via axial displacement of the control pins, each said control pin being guided in a transverse hole;connecting elements connected to respective ones of the control pins of the cam ...

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Номер записи: 86
13-06-2019 дата публикации

Method and apparatus for diagnosing fault in continuous variable valve duration system

Номер: US20190178192A1
Автор: Soung-Woong AN
Принадлежит: Hyundai Autron Co Ltd

Disclosed are a method and apparatus for diagnosing a fault in a CVVD system. The method includes collecting information necessary to determine whether a fault diagnosis mode entry condition of the CVVD system is satisfied, determining whether the fault diagnosis mode entry condition is satisfied based on the collected information, calculating prediction duration corresponding to a current engine RPM and manifold pressure when the fault diagnosis mode entry condition is satisfied, calculating current duration based on an output value of a motor sensor for detecting the RPM of the duration control motor of the CVVD system, comparing the manifold pressure-based prediction duration D1 with the sensor output-based duration D2, and determining an error of the motor sensor or whether the CVVD system has failed by comparing a duration difference cumulative value, that is, a cumulative value of difference values between the D1 and D2, with a previously stored threshold.

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Номер записи: 87
04-06-2020 дата публикации

METHOD FOR ALTERNATE CONTROL OF CVVD MALFUNCTION AND CVVD SYSTEM THEREOF

Номер: US20200173380A1
Автор: Won Min-Kyu
Принадлежит:

A method for an alternate control of a continuously variable valve duration (CVVD) malfunction may include a CVVD failsafe control to resolve a calculation error of a cylinder charge amount due to a hardware failure of a CVVD system with the cylinder charge amount determined by any one of flow rate alternate, flow rate deviation correction, and valve duration update if the hardware failure is recognized by a CVVD controller, and to apply the cylinder charge amount to secure an air amount for a combustion chamber. 1. A method of an alternate control of a continuously variable valve duration (CVVD) malfunction , the method comprising:a CVVD failsafe control to resolve a calculation error of a cylinder charge amount due to a hardware failure of a CVVD system with the cylinder charge amount determined by one of flow rate alternate, flow rate deviation correction, and valve duration update when the hardware failure is recognized by a CVVD controller, and to apply the cylinder charge amount to secure an air amount for a combustion chamber.2. The method according to claim 1 , wherein the CVVD failsafe control includes:an air amount alternate control of securing the air amount through determination of the cylinder charge amount by the flow rate alternate;an air amount deviation control of securing the air amount through determination of the cylinder charge amount by the flow rate deviation correction; andan air amount prediction control of securing the air amount through determination of the cylinder charge amount by the valve duration update.3. The method according to claim 2 , wherein the air amount alternate control includes:a step of determining validity of a feedback sensor value through detection of a signal for a short/long duration position in the hardware failure;a calculation error alternate control step of determining the cylinder charge amount for resolving the calculation error of the cylinder charge amount when the feedback sensor value does not have the ...

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Номер записи: 88
07-07-2016 дата публикации

INTERNAL COMBUSTION ENGINE

Номер: US20160194984A1
Автор: Haga Hiroyuki, MIYOSHI Yuji
Принадлежит: TOYOTA JIDOSHA KABUSHIKI KAISHA

An internal combustion engine includes an exhaust valve, a plurality of cams Ca, Cb, and Cc used to drive the exhaust valve, a cam-switching variable valve mechanism that selects a use cam used to drive the exhaust valve out of the plurality of cams Ca, Cb, and Cc, and an electronic control unit that determines whether switching abnormality of the use cam in the variable valve mechanism is present on the basis of a locus M in a predetermined period K which is a period in which the exhaust valve is opened. The locus M is a locus of an in-cylinder pressure changing rate dPc/dθ and is specifically a locus indicating a variation of the in-cylinder pressure changing rate dPc/dθ depending on a crank angle θ. 1. An internal combustion engine comprising:a variable valve mechanism including a plurality of cams used to drive an exhaust valve; and (a) select a use cam, which is a cam used to drive the exhaust valve, out of the plurality of cams, and', '(b) determine whether switching abnormality of the use cam is present on the basis of a locus of an in-cylinder pressure changing rate in a predetermined period, the predetermined period being a period in which the exhaust valve is opened., 'an electronic control unit configured to'}2. The internal combustion engine according to claim 1 , whereinthe variable valve mechanism is configured to switch the cams such that a plurality of modes are performed, andthe electronic control unit is configured to set the predetermined period to at least one period of a period in which the exhaust valve is opened by switching of the use cam and a period in which the exhaust valve is not opened by the switching of the use cam, when the switching of the use cam is normally performed depending on the modes.3. The internal combustion engine according to claim 2 , whereinthe electronic control unit is configured to determine whether the switching abnormality is present on the basis of a predetermined item of the locus, and the predetermined item ...

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Номер записи: 89
06-07-2017 дата публикации

METHOD AND SYSTEM FOR VARIABLE CAM TIMING DEVICE

Номер: US20170191386A1
Автор: Badillo Ed, Pietrzyk Paul A., Rollinger John Eric
Принадлежит:

Methods and systems are described for an engine with a cam torque actuated variable cam timing phaser. Phaser positioning control is improved by reducing inaccuracies resulting from inadvertent spool valve and/or phaser movement when the spool valve is commanded between regions. In addition, improved spool valve mapping is used to render phaser commands more consistent and robust. 1. A method , comprising: jumping a spool valve from a detent region to outside a null region; and', 'ramping the spool valve through the null region; and, 'in response to a command for phasing a cam torque actuated variable cam timing phaser from a locked position,'}in response to system oil pressure falling below a threshold, adjusting spool valve position to reduce the system oil pressure applied to a locking circuit of the phaser.2. The method of claim 1 , further comprising moving cam timing via cam torque actuated hydraulic pressure separate from engine generated oil pressure via the spool valve.3. The method of claim 2 , wherein the ramping is performed while monitoring for cam timing movement away from the locked position.4. The method of claim 3 , wherein moving the cam timing via the spool valve includes moving the spool valve to an advance region to use the cam torque actuated hydraulic pressure to advance a cam timing phaser position claim 3 , moving the spool valve to a retard region to use the cam torque actuated hydraulic pressure to retard the phaser position claim 3 , and moving the spool valve to the null region to use the cam torque actuated hydraulic pressure to hold the phaser position.5. The method of claim 4 , wherein using the cam torque actuated hydraulic pressure to advance the cam timing phaser position includes flowing hydraulic fluid from a retard chamber of the phaser to an advance chamber through a phasing circuit using the cam torque actuated hydraulic pressure claim 4 , and wherein using the cam torque actuated hydraulic pressure to retard the cam timing ...

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Номер записи: 90
11-06-2020 дата публикации

Variable compression ratio engine

Номер: US20200182146A1
Автор: Kyoung Chan HAN
Принадлежит: Hyundai Motor Co, Kia Motors Corp

A variable compression ratio engine includes an extra chamber formed at a cylinder head, an extra valve being able to open/close the extra chamber, and an actuator being able to open/close the extra chamber by driving the extra valve.

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Номер записи: 91
18-06-2020 дата публикации

Valve train with switchable engine braking

Номер: US20200191022A1
Автор: Neil Erickson
Принадлежит: Deere and Co

An internal combustion engine defining at least one cylinder, the internal combustion engine including a first camshaft lobe, a second camshaft lobe, a valve in fluid communication with the at least one cylinder, a pivot, and a follower in contact with and operatively engages the pivot, the valve, the first camshaft lobe, and the second camshaft lobe. During use, the follower is operable in a first mode, in which the follower is configured to transmit motion between the first camshaft lobe and the valve, and a second mode, in which the follower is configured to transmit motion between the first camshaft lobe and the valve and the second camshaft lobe and the valve.

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Номер записи: 92
18-06-2020 дата публикации

Method and apparatus for diagnosing engine system with continuous variable valve duration apparatus

Номер: US20200191086A1
Автор: Seungbum Kim
Принадлежит: Hyundai Motor Co, Kia Motors Corp

A method for diagnosing an engine system including a continuous variable valve duration (CVVD) apparatus, a driving unit of the CVVD apparatus including a first driving unit and a second driving unit, a CVVD position detector configured to detect a position of the CVVD apparatus, a camshaft position detector configured to detect a position of a camshaft, a front lambda detector configured to detect a lambda value at front of intake valve, and a controller may include the steps of starting the engine, detecting measured values of the front lambda detector during combustion of first to fourth cylinders (first to fourth lambda values), determining whether CVVD driving unit is misaligned according to the detected first to fourth lambda values, and generating a warning notification when the CVVD driving unit is determined to be misaligned.

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Номер записи: 93
19-07-2018 дата публикации

Continuously variable friction drive phaser

Номер: US20180202327A1
Автор: Chad McCloy
Принадлежит: BorgWarner Inc

A continuously variable friction drive is used to phase a cam plate attached to the camshaft relative to a sprocket plate driven by the crankshaft. Discs are received within the cavity between the sprocket and cam plate. The discs are free to rotate about an axis of rotation, and is fixed relative to the cam and the sprocket, so that when the sprocket plate rotates, the cam plate is rotated by the discs in the opposite direction. The axis of rotation of the discs can be tilted by an actuator, so that the discs themselves contact the plates at different distances from their axes of rotation, which changes the speed of rotation of one plate relative to the other. When the speed of rotation of the crank and cam differ, the phase angle between the two shafts is changed.

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Номер записи: 94
03-08-2017 дата публикации

Internal combustion engine air charge control

Номер: US20170218866A1
Автор: Mark A. Shost, Matthew A. Younkins
Принадлежит: Tula Technology Inc

Internal combustion engine having cam actuated valves that can be controlled to facilitate the use of different air charge levels in different cylinders or sets of cylinders are described. In one aspect a first set of cylinders is operated in a skip fire manner in which the corresponding cylinders are deactivated during skipped working cycles. Cam actuated intake valves associated with a second set of cylinders are operated differently so that the air charge in the cylinders in the second set is different than the air charge in fired cylinders subject to the skip fire control. According to another aspect, an engine having cam actuated intake valves is operated in a dynamic firing level modulation mode. During the dynamic firing level modulation operation, the cam actuated intake valves are controlled in at least two different manners to such that different cylinder working cycles have different air charges.

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Номер записи: 95
12-08-2021 дата публикации

ELECTRICALLY ACTIVATED VALVE ACTUATOR FOR AN INTERNAL COMBUSTION ENGINE

Номер: US20210246814A1
Автор: Hedman Mats
Принадлежит: Hedman Ericsson Patent AB

The present invention concerns a method and a device for electrically controlling a valve actuator in a two-stroke or four-stroke combustion engine where the actuator comprises a solenoid (A), a plunger () and a spring (), wherein the engine has at least one cylinder () with at least one freely controllable engine valve disc () with corresponding valve stem () and a valve spring (), where a distance () is provided between the lower end of the plunger and the upper end of the valve stem and where air is supplied, or exhaust gases are evacuated from, a combustion chamber () past a lower part of the valve stem with the valve disc via at least one channel () in the cylinder, wherein the valve actuator is activatable to open the engine valve. The invention is characterized in that the opening of the engine valve is initiated after activation of the solenoid, wherein the following acceleration of the plunger brings its lower end to strike the upper end of the valve stem for initial opening of the valve. 1. A method for electrically controlling a valve actuator in a two-stroke or four-stroke combustion engine , wherein the valve actuator comprises a solenoid , a plunger and a spring , wherein the spring of the valve actuator keeps the plunger in a home position when the solenoid is not activated , wherein the engine has at least one cylinder with at least one freely controllable engine valve with a valve disc with a corresponding valve stem and a valve spring , wherein a distance is provided between a lower end of the plunger and an upper end of the valve stem , and wherein air is supplied to , or exhaust gases are evacuated from , a combustion chamber past a lower part of the valve stem with the valve disc via at least one channel in the cylinder , wherein the valve actuator is activatable to open the engine valve , the method comprising:activating the solenoid such that opening of the engine valve is initiated after activation of the solenoid as a result of a following ...

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Номер записи: 96
12-08-2021 дата публикации

Control Device and Control Method for Variable Valve Timing Mechanism

Номер: US20210246846A1
Автор: JITSUISHI Makoto, Matsuo Nobuhiko
Принадлежит:

A control device and a control method for variable valve timing mechanism according to the present invention obtains a first measurement of a rotational phase based on a rotational angle of the motor, obtains a second measurement of the rotational phase based on a relative relationship between a rotational angle of the crankshaft and a rotational angle of the camshaft, calibrates the first measurement based on the second measurement, obtains a derivative term proportional to a rate of change in a deviation between the first measurement and a target value, reduces change in derivative term when calibrating the first measurement based on the second measurement, and controls the motor based on a manipulated variable including the derivative term. 1. A control device of a variable valve timing mechanism that makes a rotational phase of a camshaft variable relative to a crankshaft of an internal combustion engine by adjusting rotation of a motor , the control device being configured to:obtain information on a rotational angle of the motor, information on a rotational angle of the crankshaft, and information on a rotational angle of the camshaft;obtain a first measurement of the rotational phase based on the rotational angle of the motor;obtain a second measurement of the rotational phase based on a relative relationship between the rotational angle of the crankshaft and the rotational angle of the camshaft;calibrate the first measurement based on the second measurement;obtain a derivative term proportional to a rate of change in a deviation between the first measurement and a target value of the rotational phase;reduce change in derivative term when calibrating the first measurement based on the second measurement;obtain a manipulated variable of the motor based on the derivative term; andoutput a signal of the manipulated variable.2. The control device of the variable valve timing mechanism according to claim 1 , wherein the control device is configured to reduce change ...

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Номер записи: 97
17-08-2017 дата публикации

System and method for controlling valve timing of continuous variable valve duration engine

Номер: US20170234243A1
Автор: In Sang RYU, Kiyoung Kwon, Kyoung Pyo Ha, You Sang SON
Принадлежит: Hyundai Motor Co

The method for controlling valve timing of an engine includes: classifying control regions; applying a maximum duration to an intake valve and a long duration to an exhaust valve in a first control region; advancing Intake Valve Closing timing, applying the long duration to the exhaust valve, and maintaining a maximum valve overlap in a second control region; applying the long duration to the exhaust valve and advancing the IVC timing and Exhaust Valve Closing timing in a third control region; applying a short duration to the exhaust valve and controlling the EVC timing in a fourth control region; controlling a throttle valve, applying the short duration to the exhaust valve, and retarding Exhaust Valve Opening timing in a fifth control region; and controlling the throttle valve and the EVC timing, applying the long duration to the exhaust valve, advancing the EVO timing in a sixth control region.

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Номер записи: 98
10-09-2015 дата публикации

VEHICLE CONTROL DEVICE WITH AUTOMATIC ENGINE STOP FUNCTION

Номер: US20150252735A1
Автор: ORITA Shuichi
Принадлежит: NISSAN MOTOR CO., LTD.

In a vehicle control device with an automatic engine stop function, when the engine is in a non-operating state and the shift lever is operated to the parking range, the engine is controlled to start to supply operating oil to a valve timing changing means. 1. A vehicle control device with an automatic engine stop function , the vehicle control device comprising:a pump driven by an engine for supplying an operating oil;a valve timing change means that is supplied with the operating oil and is capable of changing an intake valve timing in a predetermined range between an advance side and a retard side and locking to a predetermined advance position irrespective of presence or absence of the operating oil;a shift lever that is operable by the driver and includes a parking range to achieve the vehicle parking state; and to start the engine to supply the operating oil to thereby actuate the valve timing change means;', 'to change to and subsequently lock the valve timing means into the predetermined advance position; and', 'to stop the engine thereafter., 'a valve timing control means that is configured, when the engine E is in non-operating state and the shift lever is operated to the parking range,'}2. The vehicle control device as claimed in claim 1 , further comprising:charging means that generates power using the driving force of the engine and charges a battery in order for a storage amount thereof to reach a predetermined value or more when the storage amount is less than the predetermined amount, wherein the valve timing control means is configured to actuate the valve timing change means, subsequent to change of the predetermined value to a second predetermined value which is greater than the predetermined value, after the storage amount has exceeded the second predetermined value.3. The vehicle control device as claimed in claim 1 , wherein the valve timing control mechanism is configured to actuate the valve timing change mechanism after a predetermined time ...

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Номер записи: 99
09-09-2021 дата публикации

HYBRID PHASER WITH HYDRAULIC LOCK IN AN INTERMEDIATE POSITION

Номер: US20210277808A1
Автор: Kenyon Brian
Принадлежит:

A phaser which has an offset or remote pilot valve added to the hydraulic circuit to manage a hydraulic detent switching function, in order to provide a mid-position lock for cold starts of the engine, either during cranking or prior to complete engine shutdown. The mid-position locking of the phaser positions the cam at an optimum position for cold restarts of the engine. 1. A variable cam timing phaser comprising:a housing assembly having an outer circumference for accepting drive force, the housing assembly comprising a first end plate and a second end plate, the first end plate or the second end plate having a pair of end plate metered pockets;a rotor assembly to connect to a camshaft, the rotor assembly coaxially located within the housing assembly, the rotor assembly having a rotor body with at least one vane extending therefrom, a rotor advance metered pocket and a rotor retard metered pocket, wherein the housing assembly and the rotor assembly define at least one chamber separated by the vane into an advance chamber and a retard chamber, the at least one chamber defined by an advance wall and a retard wall, the at least one vane within the at least one chamber acting to shift relative angular position of the housing assembly, the rotor assembly, and the at least one vane; an advance mode in which fluid is routed from the fluid input to the advance chamber, and fluid is routed from the retard chamber to one of the at least two tunable exhaust ports and to the advance chamber through a retard recirculation check valve;', 'a retard mode in which fluid is routed from the fluid input to the retard chamber, and fluid is routed from the advance chamber to one of the at least two tunable exhaust ports and to the retard chamber through an advance recirculation check valve;', 'a holding position in which fluid is routed to the advance chamber and the retard chamber from the supply line; and', 'a detent mode in which the control valve blocks fluid from exiting the ...

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Номер записи: 100