ENGINE ASSEMBLY INCLUDING CYLINDER HEAD OIL GALLERY

A cylinder head assembly includes a first member coupled to an engine block and a second member coupled to the first member. The first member defines a first port in communication with a first cylinder and a second port in communication with a second cylinder. The second member defines a longitudinally extending portion located on a first lateral half of the first member. A first control passage and a second control passage are defined between the first member and the longitudinally extending portion of the second member. The second member defines a wall separating the first and second control passages from one another. 1. A cylinder head assembly comprising:a first member defining a first port for communication with a first cylinder in an engine block and a second port for communication with a second cylinder in the engine block; anda second member coupled to the first member, the second member defining a longitudinally extending portion located on a first lateral half of the first member, a first control passage and a second control passage being defined between the first member and the longitudinally extending portion of the second member, and the second member defining a wall separating the first control passage from the second control passage.2. The cylinder head assembly of claim 1 , wherein the longitudinally extending portion of the second member defines a first lash adjuster housing intersecting the first control passage and a second lash adjuster housing intersecting the second control passage.3. The cylinder head assembly of claim 2 , wherein the first member of the cylinder head assembly defines a lash adjuster oil supply passage that provides oil to a first biasing chamber defined in a first hydraulic lash adjuster located in the first lash adjuster housing and a second biasing chamber defined in a second hydraulic lash adjuster located in the second lash adjuster housing.4. The cylinder head assembly of claim 3 , wherein the lash adjuster oil supply ...

Bi-directional control groove design for engine rotation reversal on engine with sliding camshaft

A camshaft assembly includes a camshaft rotatable about a cam axis, and a lobe pack slideably attached to the camshaft. The lobe pack includes a barrel cam that defines a control groove disposed annularly about the cam axis. When the camshaft and the lobe pack rotate about the cam axis in a first rotational direction, the control groove is shaped to react against either a first or second shifting pin, to guide the lobe pack along a first or third path respectively, into a first or second axial position respectively. When the camshaft and the lobe pack rotate about the cam axis in a second rotational direction, the control groove is shaped to react against the first and second shifting pins to guide the lobe pack along a second path, into the second axial position.

Electro-mechanical fluid sensor

A sensor system includes a sensor and a control module. The sensor includes an electrically actuated moving member. The sensor is in fluid communication with a reservoir of a separator that separates a first fluid from a fuel. The control module selectively causes current to be supplied to the sensor to actuate the member. The control module measures the current and determines a parameter of the current. The control module identifies one of presence and absence of the first fluid in the reservoir based on the parameter.

ENGINE HAVING CAMSHAFT LUBRICATION RAIL

An engine assembly may include a cylinder head defining a first bearing surface supporting a camshaft, a bearing cap fixed to the cylinder head and a lubrication rail. The first bearing surface may have a first oil inlet extending therethrough. The camshaft may define an axial bore, a first radial passage and a second radial passage. The first radial passage may extend from the axial bore through an outer circumference of the camshaft and may be in communication with the first oil inlet. The second radial passage may extend from the axial bore through an outer circumference of the camshaft. The bearing cap may be fixed to the cylinder head and include a first oil outlet in communication with the second radial passage. The lubrication rail may include a second oil inlet in communication with the first oil outlet and a first lubrication supply passage aligned with a camshaft lobe.

Crystalline polymorphs of metal ion bound STING agonists capable of modulating immune responses

The present disclosure provides compositions and methods for stimulating an innate immune response in a subject having an agent capable of stimulating an innate immune response in a subject upon administration to the subject. In particular, the present invention relates to crystalline polymorphs (e.g., coordination polymer form) of STING agonists associated (e.g., mixed) with one or more metal ions (e.g., Zn < 2 + >, Mn < 2 + >, Al < 3 + >, Fe < 3 + >, Cu < 2 + >), as well as systems and methods utilizing such compositions (e.g., in a therapeutic environment).

Electro-mechanical fluid sensor

Engine having camshaft lubrication rail

An engine assembly may include a cylinder head defining a first bearing surface supporting a camshaft, a bearing cap fixed to the cylinder head and a lubrication rail. The first bearing surface may have a first oil inlet extending therethrough. The camshaft may define an axial bore, a first radial passage and a second radial passage. The first radial passage may extend from the axial bore through an outer circumference of the camshaft and may be in communication with the first oil inlet. The second radial passage may extend from the axial bore through an outer circumference of the camshaft. The bearing cap may be fixed to the cylinder head and include a first oil outlet in communication with the second radial passage. The lubrication rail may include a second oil inlet in communication with the first oil outlet and a first lubrication supply passage aligned with a camshaft lobe.

FLUID PRESSURE CONTROL VALVE

A valve assembly configured to provide feed-back control of pressurized fluid in a gallery includes a housing and a pressure chamber. The valve assembly also includes a first passage for providing continuous flow of fluid through the gallery and a second passage for supplying the pressurized fluid to the gallery. The valve assembly additionally includes a piston moveable within the pressure chamber between a first position that opens the second passage and a second position that closes the second passage. The piston includes a third passage that provides fluid communication between the first passage and the pressure chamber. Furthermore, the valve assembly includes a spring configured to move the piston to the first position when gallery fluid pressure is less than a threshold pressure value and permit the piston to shift to the second position when gallery fluid pressure is equal to or greater than the threshold pressure value. 1. A valve assembly configured to provide feed-back control of pressurized fluid in a gallery , the valve assembly comprising:a housing;a pressure chamber;a first passage configured to provide continuous flow of fluid through the gallery;a second passage configured to supply the pressurized fluid from an external source to the gallery;a piston configured to move within the pressure chamber between a first position and a second position and having a third passage configured to establish fluid communication between the first passage and the pressure chamber, wherein the first position of the piston opens the second passage and the second position of the piston closes the second passage; anda spring disposed between the piston and the housing, the spring being configured to move the piston to the first position when pressure of the fluid in the gallery is less than a threshold fluid pressure value and permit the piston to move to the second position when pressure of the fluid in the gallery is equal to or greater than the threshold fluid ...

Engine with dual cam phaser for concentric camshaft

A cam phaser assembly may include a first stator, a first rotor, a second stator and a second rotor. The first stator may be driven by an engine crankshaft. The first rotor may be coupled to a first end of a concentric camshaft and located within the first stator. The first rotor and the first stator may cooperate to define a first set of fluid chambers. The second stator may be fixed for rotation with the first rotor and the first shaft. The second rotor may be coupled to the first end of the concentric camshaft and fixed for rotation with the second shaft and located within the second stator. The second rotor and the second stator may cooperate to define a second set of fluid chambers.

Engine with dual cam phaser for concentric camshaft

The invention relates to an engine with dual cam phaser for concentric camshaft. Concretely, a cam phaser assembly may include a first stator, a first rotor, a second stator and a second rotor. The first stator may be driven by an engine crankshaft. The first rotor may be coupled to a first end of a concentric camshaft and located within the first stator. The first rotor and the first stator may cooperate to define a first set of fluid chambers. The second stator may be fixed for rotation with the first rotor and the first shaft. The second rotor may be coupled to the first end of the concentric camshaft and fixed for rotation with the second shaft and located within the second stator. The second rotor and the second stator may cooperate to define a second set of fluid chambers.

CAMSHAFT ASSEMBLY

A camshaft assembly can control the motion of the intake or exhaust valves of an internal combustion engine and includes a base shaft extending along a longitudinal axis. The camshaft assembly further includes an axially movable structure mounted on the base shaft and axially movable relative to the base shaft. The axially movable structure includes a plurality of lobe packs. Each lobe pack includes a plurality of cam lobes. The axially movable structure includes a barrel cam defining a control groove. The camshaft assembly additionally includes an actuator including an actuator body and a pin movably coupled to the actuator body between a retracted position and an extended position. The axially movable structure can move axially relative to the base shaft when the base shaft rotates about the longitudinal axis and the pin is in the extended position and at least partially disposed in the control groove. 1. A camshaft assembly , comprising:a base shaft extending along a longitudinal axis, the base shaft being configured to rotate about the longitudinal axis; 'a plurality of lobe packs, each of the lobe packs including a plurality of cam lobes, wherein the axially movable structure includes only one barrel cam, the barrel cam defines a control groove, and the control groove defines a single path around a circumference of the barrel cam;', 'an axially movable structure mounted on the base shaft, the axially movable structure being axially movable relative to the base shaft, the axially movable structure being rotationally fixed to the base shaft, wherein the axially movable structure includesan actuator including an actuator body and first and second pins each movably coupled to the actuator body such that each of the first and second pins is movable relative to the actuator body between a retracted position and an extended position, wherein the first and second pins are configured to ride along the single path defined by the control groove;wherein the axially movable ...

DELAYED EXHAUST ENGINE CYCLE

A method of operating an engine in a delayed exhaust engine cycle may include opening an intake valve of the engine during a first stroke to form an intake stroke. The method may further include closing the intake valve and determining an engine operating temperature. The engine operating temperature may be compared to a predetermined temperature limit. A first fuel mass may be provided to the combustion chamber between an end portion of a second stroke and a beginning portion of a third stroke. The third stroke may form a first power stroke and the intake valve and an exhaust valve in communication with the combustion chamber may be closed during the second and third strokes. The exhaust valve may be maintained in a closed position during a fourth stroke when the engine operating temperature is less than the predetermined temperature limit.

Camshaft phaser control systems and methods

A control system for a vehicle includes a motor driver module, a correlation triggering module, a target phase angle module, and a correlation control module. The motor driver module controls an electric camshaft phaser of an engine based on a desired phase angle between a position of a crankshaft and a position of a camshaft. The correlation triggering module selectively generates a signal based on the position of the camshaft. The target phase angle module adjusts the desired phase angle to a predetermined phase angle in response to the generation of the signal. The correlation control module, in response to the generation of the signal: determines the position of the crankshaft when the camshaft is in a predetermined position; and selectively outputs a fault indicator based on a comparison of the position of the crankshaft and a predetermined crankshaft position range corresponding to the predetermined position.

Camshaft assembly

A camshaft assembly can control the motion of the intake or exhaust valves of an internal combustion engine and includes a base shaft extending along a longitudinal axis. The camshaft assembly further includes an axially movable structure mounted on the base shaft and axially movable relative to the base shaft. The axially movable structure includes a plurality of lobe packs. Each lobe pack includes a plurality of cam lobes. The axially movable structure includes a barrel cam defining a control groove. The camshaft assembly additionally includes an actuator including an actuator body and a pin movably coupled to the actuator body between a retracted position and an extended position. The axially movable structure can move axially relative to the base shaft when the base shaft rotates about the longitudinal axis and the pin is in the extended position and at least partially disposed in the control groove.

ENGINE INCLUDING CAMSHAFT WITH LOBE FEATURES FOR INTERNAL EXHAUST GAS RECIRCULATION

An engine assembly includes a camshaft having an exhaust cam lobe defining an exhaust lift region and an exhaust base circle region and an EGR cam lobe defining an EGR lift region and an EGR base circle region. The EGR lift region is rotationally offset from the exhaust lift region and the EGR base circle region is rotationally aligned with the exhaust lift region. An exhaust valve lift mechanism is engaged with an exhaust valve, the exhaust cam lobe and the EGR cam lobe and is operable in first and second modes. The exhaust valve remains closed when the EGR lift region engages the exhaust valve lift mechanism during the second mode and the exhaust valve is opened when the EGR lift region engages the exhaust valve lift mechanism during the first mode to provide exhaust gas flow into the combustion chamber during an intake stroke of the combustion chamber. 1. An engine assembly comprising:an engine structure defining a first combustion chamber and first exhaust port in communication with the first combustion chamber;a first exhaust valve located in the first exhaust port; a first exhaust cam lobe defining a first exhaust lift region and a first exhaust base circle region; and', 'a first EGR cam lobe defining a first EGR lift region and a first EGR base circle region, the first EGR lift region being rotationally offset from the first exhaust lift region in a rotational direction of the camshaft and the first EGR base circle region being rotationally aligned with the first exhaust lift region; and, 'a camshaft includinga first exhaust valve lift mechanism supported by the engine structure, engaged with the first exhaust cam lobe and the first EGR lobe and operable in first and second modes, the first exhaust valve remaining closed when the first EGR lift region engages the first exhaust valve lift mechanism during the second mode and the first exhaust valve being opened when the first EGR lift region engages the first exhaust valve lift mechanism during the first mode ...

Eight-stroke engine cycle

An eight-stroke engine cycle may include a first stroke forming an intake stroke and including opening an intake valve and providing a first fuel mass to the combustion chamber. The second stroke may form a first compression stroke and the third stroke may form a first expansion stroke including a first power stroke. The fourth and sixth strokes may form a second and third compression strokes and the fifth and seventh strokes may form a second and third expansion strokes. A second fuel mass may be provided to the combustion chamber during the fourth or sixth stroke. The intake valve may be in a closed position during the second and third expansion strokes and an exhaust valve in communication with the combustion chamber may be in a closed position during the second and third compression strokes. The eighth stroke may form an exhaust stroke including opening the exhaust valve.

Eight-stroke engine cycle

An eight-stroke engine cycle may include a first stroke forming an intake stroke and including opening an intake valve and providing a first fuel mass to the combustion chamber. The second stroke mayform a first compression stroke and the third stroke may form a first expansion stroke including a first power stroke. The fourth and sixth strokes may form a second and third compression strokes andthe fifth and seventh strokes may form a second and third expansion strokes. A second fuel mass may be provided to the combustion chamber during the fourth or sixth stroke. The intake valve may be ina closed position during the second and third expansion strokes and an exhaust valve in communication with the combustion chamber may be in a closed position during the second and third compression strokes. The eighth stroke may form an exhaust stroke including opening the exhaust valve.

Hydraulic control system for a switching valve train

An engine is provided having an engine block, a cylinder head mounted to the engine block, a valve train mounted to the cylinder head, and a cam cover extending over the valve train and mounted to the cylinder head. A hydraulic system for providing a hydraulic fluid to the valve train is included. The hydraulic system has a first passage extending from the engine block through the cylinder head to the cam cover and connected to a second passage. The second passage extends along a length of the cam cover and is connected to an oil control valve. At least one control passage extends from the oil control valve through the cam cover to the valve train. The oil control valve is mounted to a port in the cam cover and extends into the cam cover in a direction along a width of the cam cover.

ELECTRO-MECHANICAL FLUID SENSOR

A sensor system includes a sensor and a control module. The sensor includes an electrically actuated moving member. The sensor is in fluid communication with a reservoir of a separator that separates a first fluid from a fuel. The control module selectively causes current to be supplied to the sensor to actuate the member. The control module measures the current and determines a parameter of the current. The control module identifies one of presence and absence of the first fluid in the reservoir based on the parameter.

ENGINE WITH DUAL CAM PHASER FOR CONCENTRIC CAMSHAFT

A cam phaser assembly may include a first stator, a first rotor, a second stator and a second rotor. The first stator may be driven by an engine crankshaft. The first rotor may be coupled to a first end of a concentric camshaft and located within the first stator. The first rotor and the first stator may cooperate to define a first set of fluid chambers. The second stator may be fixed for rotation with the first rotor and the first shaft. The second rotor may be coupled to the first end of the concentric camshaft and fixed for rotation with the second shaft and located within the second stator. The second rotor and the second stator may cooperate to define a second set of fluid chambers.

Engine startup method

A method for starting an engine includes sensing a triggering event and monitoring pressure in a fuel rail. A cam shaft of the engine is oscillated with a cam phaser. The cam shaft does not complete a full rotation during the oscillation. A fuel rail pump is operated with the oscillating cam shaft until the monitored pressure in the fuel rail reaches a minimum level, and the engine is started after reaching the minimum level.

Engine startup method

A method for starting an engine includes sensing a triggering event and monitoring pressure in a fuel rail. A cam shaft of the engine is oscillated with a cam phaser. The cam shaft does not complete a full rotation during the oscillation. A fuel rail pump is operated with the oscillating cam shaft until the monitored pressure in the fuel rail reaches a minimum level, and the engine is started after reaching the minimum level.

Delayed exhaust engine cycle

A method of operating an engine in a delayed exhaust engine cycle may include opening an intake valve of the engine during a first stroke to form an intake stroke. The method may further include closing the intake valve and determining an engine operating temperature. The engine operating temperature may be compared to a predetermined temperature limit. A first fuel mass may be provided to the combustion chamber between an end portion of a second stroke and a beginning portion of a third stroke. The third stroke may form a first power stroke and the intake valve and an exhaust valve in communication with the combustion chamber may be closed during the second and third strokes. The exhaust valve may be maintained in a closed position during a fourth stroke when the engine operating temperature is less than the predetermined temperature limit.

Hydraulic control system for a switching valve train

An engine is provided having an engine block, a cylinder head mounted to the engine block, a valve train mounted to the cylinder head, and a cam cover extending over the valve train and mounted to the cylinder head. A hydraulic system for providing a hydraulic fluid to the valve train is included. The hydraulic system has a first passage extending from the engine block through the cylinder head to the cam cover and connected to a second passage. The second passage extends along a length of the cam cover and is connected to an oil control valve. At least one control passage extends from the oil control valve through the cam cover to the valve train. The oil control valve is mounted to a port in the cam cover and extends into the cam cover in a direction along a width of the cam cover.

ENGINE STARTUP METHOD

A method for starting an engine includes sensing a triggering event and monitoring pressure in a fuel rail. A cam shaft of the engine is oscillated with a cam phaser. The cam shaft does not complete a full rotation during the oscillation. A fuel rail pump is operated with the oscillating cam shaft until the monitored pressure in the fuel rail reaches a minimum level, and the engine is started after reaching the minimum level. 1. A method for starting an engine having a fuel rail , comprising:sensing a triggering event;monitoring pressure in the fuel rail;oscillating a cam shaft of the engine with a cam phaser, wherein the cam shaft does not complete a full rotation during oscillation;operating a fuel rail pump with the oscillating cam shaft until the monitored pressure in the fuel rail reaches a minimum level; andstarting the engine after the monitored pressure reaches the minimum level.2. The method of claim 1 , further comprising:monitoring for an operator startup request; and operating the fuel rail pump with the oscillating cam shaft until the monitored pressure in the fuel rail reaches a target level, wherein the target level is greater than the minimum level; and', 'starting the engine after the monitored pressure reaches the target level., 'after reaching the minimum level, if no operator startup request has occurred3. The method of claim 2 , further comprising claim 2 , after reaching the target level and if no operator startup request has occurred:operating the fuel rail pump with the oscillating cam shaft until the monitored pressure in the fuel rail reaches a maximum level, wherein the maximum level is greater than the target level;stopping the fuel rail pump;operating the fuel rail pump with the oscillating cam shaft if the monitored pressure in the fuel rail drops below the target level, such that the monitored pressure is held substantially between the target level and the maximum level; andstarting the engine after the operator startup request occurs. ...

Delayed exhaust engine cycle

A method of operating an engine in a delayed exhaust engine cycle may include opening an intake valve of the engine during a first stroke to form an intake stroke. The method may further include closing the intake valve and determining an engine operating temperature. The engine operating temperature may be compared to a predetermined temperature limit. A first fuel mass may be provided to the combustion chamber between an end portion of a second stroke and a beginning portion of a third stroke. The third stroke may form a first power stroke and the intake valve and an exhaust valve in communication with the combustion chamber may be closed during the second and third strokes. The exhaust valve may be maintained in a closed position during a fourth stroke when the engine operating temperature is less than the predetermined temperature limit.

Eight-Stroke Engine Cycle

An eight-stroke engine cycle may include a first stroke forming an intake stroke and including opening an intake valve and providing a first fuel mass to the combustion chamber. The second stroke may form a first compression stroke and the third stroke may form a first expansion stroke including a first power stroke. The fourth and sixth strokes may form a second and third compression strokes and the fifth and seventh strokes may form a second and third expansion strokes. A second fuel mass may be provided to the combustion chamber during the fourth or sixth stroke. The intake valve may be in a closed position during the second and third expansion strokes and an exhaust valve in communication with the combustion chamber may be in a closed position during the second and third compression strokes. The eighth stroke may form an exhaust stroke including opening the exhaust valve.

Electro-mechanical fluid sensor

A sensor system includes a sensor and a control module. The sensor includes an electrically actuated moving member. The sensor is in fluid communication with a reservoir of a separator that separates a first fluid from a fuel. The control module selectively causes current to be supplied to the sensor to actuate the member. The control module measures the current and determines a parameter of the current. The control module identifies one of presence and absence of the first fluid in the reservoir based on the parameter.

Oil communication manifold for an internal combustion engine

A cylinder head assembly for an internal combustion engine is provided having a cylinder head adapted to contain at least one switchable valvetrain element operable to selectively deactivate at least one intake valve and at least one other switchable valvetrain element operable to selectively deactivate at least one exhaust valve. The cylinder head defines at least one feed passage operable to selectively communicate fluid pressure to the at least one switchable valvetrain element to selectively deactivate the at least one intake valve. The cylinder head defines at least one other feed passage operable to selectively communicate fluid pressure to the at least one other switchable valvetrain element to selectively deactivate the at least one exhaust valve. An oil communication manifold is mounted to the head and defines at least one communication passage operable to enable communication of fluid pressure between the at least one feed passage and the at least one other feed passage.

Engine having camshaft lubrication rail

The invention relates to an engine having camshaft lubrication rail. The engine assembly may include a cylinder head defining a first bearing surface supporting a camshaft, a bearing cap fixed to the cylinder head and a lubrication rail. The first bearing surface may have a first oil inlet extending therethrough. The camshaft may define an axial bore, a first radial passage and a second radial passage. The first radial passage may extend from the axial bore through an outer circumference of the camshaft and may be in communication with the first oil inlet. The second radial passage may extendfrom the axial bore through an outer circumference of the camshaft. The bearing cap may be fixed to the cylinder head and include a first oil outlet in communication with the second radial passage. The lubrication rail may include a second oil inlet in communication with the first oil outlet and a first lubrication supply passage aligned with a camshaft lobe.

Eight-stroke engine cycle

An eight-stroke engine cycle may include a first stroke forming an intake stroke and including opening an intake valve and providing a first fuel mass to the combustion chamber. The second stroke may form a first compression stroke and the third stroke may form a first expansion stroke including a first power stroke. The fourth and sixth strokes may form a second and third compression strokes andthe fifth and seventh strokes may form a second and third expansion strokes. A second fuel mass may be provided to the combustion chamber during the fourth or sixth stroke. The intake valve may be ina closed position during the second and third expansion strokes and an exhaust valve in communication with the combustion chamber may be in a closed position during the second and third compression strokes. The eighth stroke may form an exhaust stroke including opening the exhaust valve.

CAMSHAFT PHASER CONTROL SYSTEMS AND METHODS

A control system for a vehicle includes a motor driver module, a correlation triggering module, a target phase angle module, and a correlation control module. The motor driver module controls an electric camshaft phaser of an engine based on a desired phase angle between a position of a crankshaft and a position of a camshaft. The correlation triggering module selectively generates a signal based on the position of the camshaft. The target phase angle module adjusts the desired phase angle to a predetermined phase angle in response to the generation of the signal. The correlation control module, in response to the generation of the signal: determines the position of the crankshaft when the camshaft is in a predetermined position; and selectively outputs a fault indicator based on a comparison of the position of the crankshaft and a predetermined crankshaft position range corresponding to the predetermined position. 1. A control system for a vehicle , comprising:a motor driver module that controls an electric camshaft phaser of an engine based on a desired phase angle between a position of a crankshaft and a position of a camshaft;a correlation triggering module that selectively generates a signal based on the position of the camshaft;a target phase angle module that adjusts the desired phase angle to a predetermined phase angle in response to the generation of the signal; and determines the position of the crankshaft when the camshaft is in a predetermined position; and', 'selectively outputs a fault indicator based on a comparison of the position of the crankshaft and a predetermined crankshaft position range corresponding to the predetermined position., 'a correlation control module that, in response to the generation of the signal2. The control system of further comprising a position storage module that stores a first value of the position of the camshaft in response to a shutdown of the engine and that stores a second value of the position of the camshaft in ...

CAMSHAFT ASSEMBLY

A camshaft assembly for a vehicle engine includes a camshaft member, a cam phaser and a cam nose. The camshaft member includes a front end and a rear end. The camshaft member may be configured to actuate at least one intake valve of a combustion chamber. The cam phaser affixed to the front end of the camshaft member while the cam nose may be disposed at the front end of the camshaft. The cam nose further includes a cam nose face with a curvilinear groove surrounding a central axis region of the cam nose. The curvilinear groove may be configured to engage with the cam phaser to prevent oil leakage out from the central axis region and/or to rotationally lock the cam phaser to the camshaft member. 1. A camshaft assembly for a vehicle engine , the camshaft assembly comprising:a camshaft member having a front end and a rear end, the camshaft member configured to actuate at least one intake valve of a combustion chamber;a cam phaser affixed to the front end of the camshaft member; anda cam nose disposed at the front end of the camshaft member, the cam nose having a cam nose face with an curvilinear groove surrounding a central axis region of the cam nose and configured to engage with the cam phaser and prevent oil leakage out from the central axis region.2. The camshaft assembly as defined in wherein the cam phaser further comprises an input gear and an output gear wherein the output gear is configured to drive the rotation of the camshaft member via at least an engagement between the cam phaser and the curvilinear groove.3. The camshaft assembly as defined in wherein the output gear is rotatably supported by the input gear.4. The camshaft assembly as defined in wherein the output gear face deforms upon engagement with the curvilinear groove.5. The camshaft assembly as defined in wherein the curvilinear groove further includes a curvilinear valley and a curvilinear protrusion formed on each side of the curvilinear valley.6. The camshaft assembly as defined in wherein the ...

VARIABLE CAMSHAFT

A variable camshaft includes a base shaft, an axially movable structure, and an actuator. The axially movable structure includes a plurality of lobe packs and at least one barrel cam defining a control groove having an engagement region, a first shift region, a balancing region, a second shift region and a disengagement region. The actuator includes at least one pin operatively configured to move relative to the actuator body between a retracted position and an extended position into the control groove. The axially movable structure moves axially relative to the base shaft the pin is in the extended position and is at least partially disposed in one of the first or second shift regions of the control groove. 1. A variable camshaft comprising:a base shaft;an axially movable structure mounted on the base shaft, the axially movable structure being axially movable relative to the base shaft and being rotationally fixed to the base shaft, wherein the axially movable structure includes a plurality of lobe packs and at least one barrel cam defining a control groove having an engagement region, a first shift region, a balancing region, a second shift region and a disengagement region having a disengagement catch wall;an actuator including an actuator body and at least one pin movably coupled to the actuator body, the at least one pin being configured to move relative to the actuator body between a retracted position and an extended position; andwherein the axially movable structure is configured to move axially relative to the base shaft when the base shaft rotates about a longitudinal axis and the at least one pin is in the extended position and at least partially disposed in one of the first or second shift regions of the control groove.2. The variable camshaft as defined in wherein the balancing region is defined in the control groove between the first and second shift regions.3. The variable camshaft as defined in wherein the at least one pin is operatively configured ...

Sliding CAM Recovery From Short To Ground On Actuator Low Side

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 ...

BI-DIRECTIONAL CONTROL GROOVE DESIGN FOR ENGINE ROTATION REVERSAL ON ENGINE WITH SLIDING CAMSHAFT

A camshaft assembly includes a camshaft rotatable about a cam axis, and a lobe pack slideably attached to the camshaft. The lobe pack includes a barrel cam that defines a control groove disposed annularly about the cam axis. When the camshaft and the lobe pack rotate about the cam axis in a first rotational direction, the control groove is shaped to react against either a first or second shifting pin, to guide the lobe pack along a first or third path respectively, into a first or second axial position respectively. When the camshaft and the lobe pack rotate about the cam axis in a second rotational direction, the control groove is shaped to react against the first and second shifting pins to guide the lobe pack along a second path, into the second axial position. 1. An internal combustion engine comprising:a camshaft rotatable about a cam axis;a lobe pack slideably attached to the camshaft for axial movement along the cam axis relative to the camshaft, and rotatable with the camshaft about the cam axis, wherein the lobe pack includes a barrel cam defining a control groove disposed annularly about the cam axis;at least one shifting pin moveable along a respective pin axis in a direction transverse to the cam axis between an engaged position and a disengaged position;wherein the at least one shifting pin is engaged with the control groove when disposed in the engaged position, such that interaction between the at least one shifting pin and the control groove moves the lobe pack axially along the cam axis relative to the camshaft as the lobe pack rotates about the cam axis with the camshaft;wherein the at least one shifting pin is disengaged from the control groove, such that the lobe pack remains positionally fixed along the cam axis relative to the camshaft as the lobe pack rotates about the cam axis with the camshaft, when the at least one shifting pin is disposed in the disengaged position;wherein the control groove is shaped to engage the at least one shifting ...

SLIDING CAMSHAFT ASSEMBLY

A camshaft assembly includes an actuator and an axially moveable structure mounted to a base shaft wherein the axially moveable structure includes a plurality of lobe packs and a cam barrel. The axially movable structure moves along the base shaft in the axial direction along a longitudinal axis of the base shaft, but is rotationally fixed to the base shaft. The barrel cam includes an inner wall and an outer wall which defines a control groove therebetween. The control groove further defines first and second regions wherein the first region includes a fixed narrow control groove width and the second region includes a progressively decreasing control groove width. The actuator shifts the axially moveable structure relative to the base shaft between a first position and a second position. A recess is defined in the outer wall such that the recess is disposed adjacent to the first region. 1. A camshaft assembly comprising:a base shaft extending along a longitudinal axis; 'a plurality of lobe packs, each of the plurality of lobe packs including a plurality of', 'an axially movable structure mounted on the base shaft and being axially movable relative to the base shaft between a first position and a second position via an actuator while also being rotationally fixed to the base shaft, the axially movable structure includes a barrel cam having a control groove defined between an inner wall and an outer wall of the barrel cam such that the control groove further includes a first region having a fixed narrow groove width between the inner and outer walls and a second region having an enlarged groove width between the inner wall and the outer walls; and', 'a recess is defined in the outer wall of the barrel cam such that the recess is disposed adjacent to the first region;', 'wherein the recess is defined in the first region of the barrel cam, and', 'wherein the fixed narrow groove and the enlarged groove are aligned circumferentially around the longitudinal axis at an axial ...

Shifting camshaft groove design for load reduction

A camshaft assembly includes a base shaft including at least one lobe pack axially movably mounted on the base shaft, the lobe pack including a control groove therein. An actuator device includes a pin movably mounted to the actuator between a retracted position and an extended position for engaging with the control groove to cause axial movement of the lobe pack. The control groove includes a pin engagement region, a shifting region and an ejection region. The pin engagement region of the control groove has a first pair of sidewalls. The shifting region extends from the pin engagement region and has a second pair of sidewalls angled relative to the first pair of sidewalls and having a first portion with a varying groove width that varies relative to a groove width of the pin engagement region.

SLIDING CAMSHAFT BARREL POSITION SENSING

A system and method for sensing a camshaft barrel position of a sliding camshaft includes at least one sliding camshaft having at least one camshaft barrel and at least one position shifting slot disposed in the at least one camshaft barrel. At least one actuator is provided for engaging the at least one position shifting slot on the rotating sliding camshaft and shifting position of the at least one camshaft barrel and at least one sensor is provided for detecting the shifted position of the at least one camshaft barrel wherein the camshaft barrel includes position identifying features. 1. A system for sensing camshaft barrel position of a sliding camshaft comprising:at least one sliding camshaft having at least one camshaft barrel;at least one position shifting slot disposed in the at least one camshaft barrel;at least one actuator for engaging the at least one position shifting slot and shifting position of the at least one camshaft barrel; andat least one sensor for detecting the shifted position of the at least one camshaft barrel.2. The system of wherein at least one sliding camshaft is an intake camshaft.3. The system of wherein at least one sliding camshaft is an exhaust camshaft.4. The system of wherein the intake camshaft has two sliding lobes each having two camshaft barrels.5. The system of wherein the exhaust camshaft has two sliding lobes each having one camshaft barrel.6. The system of wherein two actuators are used for shifting the position of the two intake camshaft sliding lobes.7. The system of wherein two actuators are used for shifting the position of the two exhaust camshaft sliding lobes.8. The system of wherein the at least one sensor is a Hall Effect sensor.9. The system of wherein the intake camshaft positions can be shifted between high lift claim 2 , low lift and deactivated positions.10. The system of wherein the exhaust camshaft position can be shifted between high lift and deactivated positions.11. A method for sensing camshaft barrel ...

SYSTEM AND METHOD FOR DETERMINING AN OIL CONTAMINATION LEVEL OF AN ENGINE BASED ON A SWITCHING PERIOD OF A VALVE LIFT ACTUATOR TO IMPROVE ENGINE STARTUPS

A system according to the principles of the present disclosure includes a switching period module and at least one of a valve lift control module and a start-stop control module. The switching period module determines a switching period that elapses as a valve lift actuator of an engine switches between a first valve lift position and a second valve lift position that is different than the first lift position. The switching period begins when a measured position of the valve lift actuator corresponds to the first lift position and the switching period ends when the measured position of the valve lift actuator corresponds to the second lift position. The valve lift control module controls the valve lift actuator based on the switching period. The start-stop control module determines whether to automatically stop the engine based on the switching period. 1. A system comprising:a switching period module that determines a switching period that elapses as a valve lift actuator of an engine switches between a first valve lift position and a second valve lift position that is different than the first lift position, wherein the switching period begins when a measured position of the valve lift actuator corresponds to the first lift position and the switching period ends when the measured position of the valve lift actuator corresponds to the second lift position; and a valve lift control module that controls the valve lift actuator based on the switching period; and', 'a start-stop control module that determines whether to automatically stop the engine based on the switching period., 'at least one of2. The system of wherein the first valve lift position and the second valve lift positon each include one of a zero lift position claim 1 , a low lift position claim 1 , and a high lift position.3. The system of wherein the valve lift actuator switches between the first valve lift position and the second valve lift position by translating a lobe of a camshaft along a ...

DETENT ASSEMBLY AND A METHOD OF ASSEMBLING THE DETENT ASSEMBLY

A detent assembly and a method of assembling the detent assembly are disclosed. The detent assembly includes a first shaft rotatable about a longitudinal axis and has an outer surface. The first shaft defines a cavity having an opening defined by the outer surface. The detent assembly further includes a camshaft defining an aperture along the longitudinal axis to present an inner wall of the camshaft that circumscribes the longitudinal axis. The inner wall defines a plurality of recesses spaced from each other. The detent assembly also includes a self-contained plunger unit that is secured to the first shaft in the cavity as a unit. A plunger of the self-contained plunger unit engages the inner wall as the camshaft is disposed over the self-contained plunger unit so that the plunger rests in one of the recesses of the camshaft to selectively secure together the first shaft and the camshaft. 1. A detent assembly comprising:a first shaft rotatable about a longitudinal axis and having an outer surface, with the first shaft defining a cavity having an opening defined by the outer surface;a camshaft defining an aperture along the longitudinal axis to present an inner wall of the camshaft that circumscribes the longitudinal axis, with the inner wall defining a plurality of recesses spaced from each other; anda self-contained plunger unit that is secured to the first shaft in the cavity as a unit, with a plunger of the self-contained plunger unit engaging the inner wall as the camshaft is disposed over the self-contained plunger unit so that the plunger rests in one of the recesses of the camshaft to selectively secure together the first shaft and the camshaft.2. An assembly as set forth in wherein the self-contained plunger unit includes a housing secured to the first shaft in the cavity and a biasing member contained in the housing claim 1 , with the plunger movably coupled to the housing and continuously biased outwardly away from the longitudinal axis by the biasing ...

Delayed engine cycle

Ein Verfahren zum Betreiben eines Motors in einem Motorzyklus mit verzögertem Auslass kann das Öffnen eines Einlassventils des Motors während eines ersten Takts, um einen Ansaugtakt zu bilden, umfassen. Das Verfahren kann weiterhin das Schließen des Einlassventils und das Ermitteln einer Motorbetriebstemperatur umfassen. Die Motorbetriebstemperatur kann mit einem vorbestimmten Temperaturgrenzwert verglichen werden. Zwischen einem Endteil eines zweiten Takts und einem Anfangsteil eines dritten Takts kann dem Brennraum eine erste Kraftstoffmasse geliefert werden. Der dritte Takt kann einen ersten Arbeitstakt bilden, und das Einlassventil und ein Auslassventil, die mit dem Brennraum in Verbindung stehen, können während des zweiten und des dritten Takts geschlossen sein. Das Auslassventil kann während eines vierten Takts in einer geschlossenen Stellung gehalten werden, wenn die Motorbetriebstemperatur niedriger als der vorbestimmte Temperaturgrenzwert ist. A method of operating an engine in a delayed exhaust engine cycle may include opening an intake valve of the engine during a first stroke to form an intake stroke. The method may further include closing the intake valve and determining an engine operating temperature. The engine operating temperature may be compared to a predetermined temperature limit. Between an end part of a second clock and an initial part of a third clock, a first fuel mass can be delivered to the combustion chamber. The third stroke may form a first stroke, and the inlet valve and an exhaust valve associated with the combustion chamber may be closed during the second and third strokes. The exhaust valve may be held in a closed position during a fourth stroke when the engine operating temperature is less than the predetermined temperature limit.

Detent assembly and a method of assembling the detent assembly

A detent assembly and a method of assembling the detent assembly are disclosed. The detent assembly includes a first shaft rotatable about a longitudinal axis and has an outer surface. The first shaft defines a cavity having an opening defined by the outer surface. The detent assembly further includes a camshaft defining an aperture along the longitudinal axis to present an inner wall of the camshaft that circumscribes the longitudinal axis. The inner wall defines a plurality of recesses spaced from each other. The detent assembly also includes a self-contained plunger unit that is secured to the first shaft in the cavity as a unit. A plunger of the self-contained plunger unit engages the inner wall as the camshaft is disposed over the self-contained plunger unit so that the plunger rests in one of the recesses of the camshaft to selectively secure together the first shaft and the camshaft.

Hydraulic control system for a switching valve drive

Es wird ein Motor mit einem Motorblock, einem Zylinderkopf, der an dem Motorblock angebracht ist, einem Ventiltrieb, der an dem Zylinderkopf angebracht ist, und einem Ventildeckel, der sich über den Ventiltrieb erstreckt und an dem Zylinderkopf angebracht ist, geschaffen. Darin ist ein Hydrauliksystem zum Liefern eines Hydraulikfluids an den Ventiltrieb enthalten. Das Hydrauliksystem besitzt einen ersten Kanal, der sich von dem Motorblock durch den Zylinderkopf zu dem Ventildeckel erstreckt und mit einem zweiten Kanal verbunden ist. Der zweite Kanal erstreckt sich längs einer Länge des Ventildeckels und ist mit einem Ölsteuerventil verbunden. Wenigstens ein Steuerkanal erstreckt sich von dem Ölsteuerventil durch den Ventildeckel zu dem Ventiltrieb. Das Ölsteuerventil ist an einem Anschluss in dem Ventildeckel angebracht und erstreckt sich in Breitenrichtung des Ventildeckels in den Ventildeckel. There is provided an engine having an engine block, a cylinder head attached to the engine block, a valvetrain attached to the cylinder head, and a valve cover extending over the valvetrain and attached to the cylinder head. This includes a hydraulic system for supplying hydraulic fluid to the valvetrain. The hydraulic system has a first passage extending from the engine block through the cylinder head to the valve cover and connected to a second passage. The second channel extends along a length of the valve cover and is connected to an oil control valve. At least one control passage extends from the oil control valve through the valve cover to the valvetrain. The oil control valve is attached to a port in the valve cover and extends in the width direction of the valve cover in the valve cover.

Engine including camshaft with lobe features for internal exhaust gas recirculation

An engine assembly includes a camshaft having an exhaust cam lobe defining an exhaust lift region and an exhaust base circle region and an EGR cam lobe defining an EGR lift region and an EGR base circle region. The EGR lift region is rotationally offset from the exhaust lift region and the EGR base circle region is rotationally aligned with the exhaust lift region. An exhaust valve lift mechanism is engaged with an exhaust valve, the exhaust cam lobe and the EGR cam lobe and is operable in first and second modes. The exhaust valve remains closed when the EGR lift region engages the exhaust valve lift mechanism during the second mode and the exhaust valve is opened when the EGR lift region engages the exhaust valve lift mechanism during the first mode to provide exhaust gas flow into the combustion chamber during an intake stroke of the combustion chamber.

Engine with a camshaft lubrication manifold

Eine Motoranordnung kann einen Zylinderkopf, der eine erste Lageroberfläche definiert, die eine Nockenwelle lagert, einen am Zylinderkopf befestigten Lagerdeckel und ein Schmierungsverteilerrohr enthalten. Die erste Lageroberfläche kann einen ersten Öleinlass aufweisen, der sich durch diese hindurch erstreckt. Die Nockenwelle kann eine axiale Bohrung, einen ersten radialen Durchgang und einen zweiten radialen Durchgang definieren. Der erste radiale Durchgang kann sich von der axialen Bohrung durch einen Außenumfang der Nockenwelle hindurch erstrecken und kann mit dem ersten Öleinlass in Verbindung stehen. Der zweite radiale Durchgang kann sich von der axialen Bohrung durch einen Außenumfang der Nockenwelle hindurch erstrecken. Der Lagerdeckel kann an dem Zylinderkopf befestigt sein und kann einen ersten Ölauslass in Verbindung mit dem zweiten radialen Durchgang enthalten. Das Schmierungsverteilerrohr kann einen zweiten Öleinlass in Verbindung mit dem ersten Ölauslass und einen ersten Schmierungsversorgungsdurchgang enthalten, der mit einem Nockenwellenbuckel ausgerichtet ist. An engine assembly may include a cylinder head defining a first bearing surface that supports a camshaft, a bearing cap attached to the cylinder head, and a lubrication rail. The first bearing surface may have a first oil inlet extending therethrough. The camshaft may define an axial bore, a first radial passage, and a second radial passage. The first radial passage may extend from the axial bore through an outer periphery of the camshaft and may be in communication with the first oil inlet. The second radial passage may extend from the axial bore through an outer periphery of the camshaft. The bearing cap may be attached to the cylinder head and may include a first oil outlet in communication with the second radial passage. The lubrication rail may include a second oil inlet in communication with the first oil outlet and a first lubrication supply passage that is aligned with a camshaft boss.

Schaltbares Ventiltriebsystem und Betriebsverfahren

Es ist ein schaltbares Ventiltriebsystem vorgesehen, das eine Steuereinheit und ein Druckregelventil, das auf Steuersignale von der Steuereinheit anspricht, aufweist. Eine Druckfluidquelle ist mit dem Druckregelventil verbunden vorgesehen. Es ist auch eine schaltbare Ventiltriebkomponente mit einem Sperrmechanismus und einem Schmierkreis in selektiver Verbindung mit der Druckfluidquelle über das Druckregelventil vorgesehen. Das Druckregelventil dient dazu, einen Fluiddruck in Ansprechen auf Steuersignale von der Steuereinheit selektiv und variaus und den Schmierkreis zu übertragen. Es ist auch ein Verfahren zum Betreiben des schaltbaren Ventiltriebsystems vorgesehen.

Schaltbares Ventiltriebsystem und Verfahren zum Steuern einer schaltbaren Ventiltriebskomponente für einen Verbrennungsmotor

Schaltbares Ventiltriebsystem (10), das umfasst: eine Steuereinheit (12); ein Druckregelventil (14), das auf Steuersignale von der Steuereinheit (12) anspricht; eine Druckfluidquelle (28), die mit dem Druckregelventil (14) verbunden ist; eine schaltbare Ventiltriebkomponente (16) mit einem Sperrmechanismus (34) und einem Schmierkreis (32, 32A) in selektiver Verbindung mit der Druckfluidquelle (28) über das Druckregelventil (14); wobei das Druckregelventil (14) dazu dient, einen Fluiddruck in Ansprechen auf Steuersignale von der Steuereinheit (12) selektiv und variabel von der Druckfluidquelle (28) an den Sperrmechanismus (34) und den Schmierkreis (32, 32A) zu übertragen, um das schaltbare Ventiltriebsystem (10) angemessen zu schmieren und gleichzeitig eine Fluidströmung und zugehörige Verluste zu begrenzen; wobei die Steuereinheit (12) das Druckregelventil (14) in einem ersten Modus derart ansteuert, dass ein Fluiddruck selektiv und intermittierend an den Schmierkreis (32, 32A) der Ventiltriebkomponente (16) auf einem ersten Fluiddruckniveau bereit gestellt wird, wobei der erste Fluiddruck unter dem Aktivierungs-Fluiddruck liegt, der erforderlich ist, um ein Sperren des Sperrmechanismus (34) zu bewirken, um die schaltbare Ventiltriebkomponente (16) angemessen zu schmieren und gleichzeitig eine Fluidströmung und zugehörige Verluste zu begrenzen; und wobei die Steuereinheit (12) das Druckregelventil (14) in einem zweiten Modus derart ansteuert, dass ein Fluiddruck an die Ventiltriebkomponente (16) auf einem zweiten Fluiddruckniveau bereitgestellt wird, wobei das zweite Fluiddruckniveau über dem Aktivierungs-Fluiddruckniveau liegt, um ein Sperren des Sperrmechanismus (34) zu bewirken, und anschließend der Fluiddruck zu der Ventiltriebkomponente (16) auf ein drittes Fluiddruckniveau verringert wird, wobei das dritte Fluiddruckniveau unter dem zweiten Fluiddruckniveau und über dem Haltedruckniveau liegt, sodass das Sperren des Sperrmechanismus (34) beibehalten wird.

Rückstellung von schiebenocken nach einem masseschluss auf der stellglied-low-seite

Ein Motorsteuergerät beinhaltet mindestens einen High-Side-Treiber mit mindestens einem Einlassnockenwellen-Stellglied und mindestens einem Auslassnockenwellen-Stellglied. Eine Vielzahl von Low-Side-Treibern ist an das mindestens eine Einlassnockenwellen-Stellglied und das mindestens eine Auslassnockenwellen-Stellglied verbunden. Das Schiebenockenwelle-Steuermodul betätigt selektiv den mindestens einen High-Side-Treiber und die Vielzahl von Low-Side-Treibern basierend auf einem Zustand, der in Zusammenhang mit mindestens einem Einlassnockenwellen-Stellglied und/oder dem mindestens einen Auslassnockenwellen-Stellglied steht.

Motorsteuergerät und Verfahren zur Rückstellung von Schiebenocken nach einem Masseschluss auf der Stellglied-Low-Seite

Motorsteuergerät (160) umfassend:mindestens einen High-Side-Treiber (150), der mit mindestens einem Einlassnockenwellen-Stellglied (134) und mindestens einem Auslassnockenwellen-Stellglied (136) gekoppelt ist;eine Vielzahl von Low-Side-Treibern (152), die mit mindestens einem Einlassnockenwellen-Stellglied (134) und mindestens einem Auslassnockenwellen-Stellglied (136) gekoppelt sind; undein Schiebenockenwelle-Steuermodul (156), das selektiv den mindestens einen High-Side-Treiber (150) und die Vielzahl von Low-Side-Treibern (152) basierend auf einem Status betätigt, der mindestens einem Einlassnockenwellen-Stellglied (134) und/oder mindestens einem Auslassnockenwellen-Stellglied (136) zugeordnet ist.

Arretierungsbaugruppe und Verfahren zum Montieren der Arretierungsbaugruppe

Arretierungsbaugruppe (12), die umfasst:eine erste Welle (22), die um eine Längsachse (24) drehbar ist und eine Außenfläche (26) aufweist, wobei die erste Welle (22) einen Hohlraum (28) mit einer Mündung definiert, die durch die Außenfläche (26) definiert ist;eine Nockenwelle (16), die eine Öffnung (30) entlang der Längsachse (24) definiert, um eine Innenwand (32) der Nockenwelle (16) aufzuweisen, welche die Längsachse (24) umschreibt, wobei die Innenwand (32) mehrere Aussparungen (40) definiert, die voneinander beabstandet sind; undeine in sich abgeschlossene Kolbeneinheit (42), die an der ersten Welle (22) in dem Hohlraum (28) als eine Einheit befestigt ist, wobei ein Kolben (44) der in sich abgeschlossenen Kolbeneinheit (42) mit der Innenwand (32) in Eingriff steht, wenn die Nockenwelle (16) über der in sich abgeschlossenen Kolbeneinheit (42) angeordnet ist, so dass der Kolben (44) in einer der Aussparungen (40) der Nockenwelle (16) ruht, um die erste Welle (22) und die Nockenwelle (16) selektiv aneinander zu befestigen,wobei die in sich abgeschlossene Kolbeneinheit (42) ein Gehäuse (46), das an der ersten Welle (22) in dem Hohlraum (28) befestigt ist, und ein Vorspannelement (48) aufweist, das in dem Gehäuse (46) enthalten ist, wobei der Kolben (44) bewegbar mit dem Gehäuse (46) gekoppelt und durch das Vorspannelement (48) kontinuierlich nach außen von der Längsachse (24) weg vorgespannt ist und wobei ein Abschnitt des Kolbens (44) nach außen über die Außenfläche (26) der ersten Welle (22) von der Längsachse (24) weg hervorsteht, wenn die Innenwand (32) von der in sich abgeschlossenen Kolbeneinheit (42) beabstandet ist, während er mit dem Gehäuse (46) bewegbar gekoppelt bleibt, undwobei das Gehäuse (46) eine Kammer (50) definiert, die das Vorspannelement (48) und den Kolben (44) aufnimmt, dadurch gekennzeichnet, dassdas Gehäuse (46) eine erste Stufe (56) aufweist, die in der Kammer (50) angeordnet ist, undder Kolben (44) eine Lippe (58) aufweist, die sich nach ...

Sliding CAM recovery from short to ground on actuator low side

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.

System and method for determining an oil contamination level of an engine based on a switching period of a valve lift actuator to improve engine startups

A system according to the principles of the present disclosure includes a switching period module and at least one of a valve lift control module and a start-stop control module. The switching period module determines a switching period that elapses as a valve lift actuator of an engine switches between a first valve lift position and a second valve lift position that is different than the first lift position. The switching period begins when a measured position of the valve lift actuator corresponds to the first lift position and the switching period ends when the measured position of the valve lift actuator corresponds to the second lift position. The valve lift control module controls the valve lift actuator based on the switching period. The start-stop control module determines whether to automatically stop the engine based on the switching period.

Shifting camshaft groove design for load reduction

A camshaft assembly includes a base shaft including at least one lobe pack axially movably mounted on the base shaft, the lobe pack including a control groove therein. An actuator device includes a pin movably mounted to the actuator between a retracted position and an extended position for engaging with the control groove to cause axial movement of the lobe pack. The control groove includes a pin engagement region, a shifting region and an ejection region. The pin engagement region of the control groove has a first pair of sidewalls. The shifting region extends from the pin engagement region and has a second pair of sidewalls angled relative to the first pair of sidewalls and having a first portion with a varying groove width that varies relative to a groove width of the pin engagement region.