Abstract: The valve open/close timing control device includes a housing that rotates synchronously with a crankshaft, an inner rotor that is disposed inside of the housing and rotates integrally with a camshaft, a fluid pressure chamber formed between the housing and the inner rotor, an intermediate lock mechanism capable of switching between a locked state and an unlocked state, an unlocking channel that allows passage of working oil to be supplied to or discharged from the intermediate lock mechanism, a lock discharge channel that allows passage of working oil discharged from the intermediate lock mechanism, and an electromagnetic valve that controls the supply/discharge of the working oil to/from the fluid pressure chamber and the intermediate lock mechanism. With this valve open/close timing control device, the lock discharge channel allows passage of the working oil in the case where the electricity supply amount to the electromagnetic valve is 0 or the maximum.

Abstract: The present invention relates to a control device and a control method for a variable valve timing mechanism that changes a valve timing by adjusting a rotational speed of a motor. The control device detects a phase angle RA1 based on an output of a crank angle sensor and an output of a cam angle sensor and calculates a change amount ?RA of a rotational phase based on a difference between a rotation amount of a sprocket and a rotation amount of the motor. The control device stops calculating change amount ?RA when a failure occurs in a motor rotation angle sensor. When a failure occurs in one of the crank angle sensor or the cam angle sensor, the control device stops calculating phase angle RA1 and calculates change amount ?RA using a normal one of the sensors and the motor rotation angle sensor.

Abstract: A valve opening/closing timing control device is configured to be capable of appropriately setting a valve opening/closing timing within a short period of time from start-up of an internal combustion engine. An advancing chamber and a retarding chamber for relative phase control are formed between a driving rotating body that rotates synchronously with a drive shaft of an internal combustion engine and a driven rotating body that rotates integrally with a valve opening/closing camshaft, and a lock mechanism that locks the relative rotation phase at a locked phase is provided. During start-up of the internal combustion engine, a controller starts fluid-filling control for filling the advancing chamber and the retarding chamber with a fluid, and performs unlock control for releasing a locked state of the lock mechanism before filling of the fluid by the fluid-filling control is completed.

Abstract: A variable valve timing device for an engine utilizing hydraulically actuated valves. A cam follower block, complete with radial bores, and cam followers within these bores, is pivotally mounted about a rotating camshaft. The rotating camshaft displaces the cam followers within the bores, causing the followers to displace hydraulic fluid, forcing movement of either, an intake or exhaust valve, by hydraulic force on a secondary hydraulic cylinder. The cam follower block angular position about the camshaft is mechanically adjustable during operation. Separate cam follower blocks are used for intake and exhaust valve operation such that the valve timing of the intake and exhaust valves can be changed independently.

Abstract: A camshaft phaser for controllably varying the phase relationship between a crankshaft and a camshaft of an internal combustion engine includes a housing connectable to the crankshaft and having a housing bore extending therethrough along an axis. A back cover is attached to one axial end of the housing while a front cover is attached to the other axial end of the housing. An output hub connectable to the camshaft is disposed coaxially within the housing and captured axially between the back cover and the front cover. A harmonic gear drive unit is disposed operationally between the housing and the output hub and is connected to a rotational actuator for imparting rotation on the harmonic gear drive unit such that rotation of the harmonic gear drive unit by the rotational actuator causes relative rotation between the housing and the output hub.

Abstract: A valve timing varying device includes a housing rotor (20) composed of a front side housing member (22) and a rear side housing member (21), a vane rotor (30), and an urging spring (40) for rotationally urging the vane rotor in one direction with respect to the housing rotor. The urging spring has a coil part, a first end provided outside in a radial direction with respect to the coil part, and a second end provided inside in the radial direction with respect to the coil part. The front side housing member has a first latching concave part for latching the first end on an inside wall face. The vane rotor has an accommodation concave part for accommodating at least a part of the coil part at the front end side, and a second latching concave part for latching the second end in an area facing an opening.

Abstract: A valve opening and closing timing control device includes: a driving-side rotating body coaxial with a rotational axis and rotated in synchronization with an internal combustion engine crankshaft; a driven-side rotating body coaxial with the rotational axis and integrally rotated with a valve opening and closing cam shaft; a connecting member screwed into the cam shaft for connecting the driven-side rotating body to the cam shaft and having a pump port to which a fluid is supplied, an advance angle port communicating with an advance angle chamber, and a retarded angle port communicating with an retarded angle chamber; a spool accommodated within a space of the connecting member to reciprocally move between advance angle, neutral, and retarded angle positions along the rotational axis; and an actuator causing a pressing force to act along rotational axis and operates the spool to be in the neutral, advance angle, or retarded angle positions.

Abstract: 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.

Abstract: A method and apparatus for operating a valve train of an internal combustion engine having a main camshaft for which at least one rotationally-fixed cam carrier is provided that can be shifted between two axial positions is disclosed. An actuator cooperates with at least one shift gate to axially shift the cam carrier into a target position. The actuator comprises a driver that is extended in the direction of at least one sliding slot of the shift gate to shift the cam carrier. The sliding slot has an ejection ramp in an ejection region that ejects the driver out of the sliding slot until the conclusion of the shift. A voltage induced in the actuator by the ejection is detected, the induced voltage is integrated across a rotational-angle range associated with the ejection region, and a confirmation signal is generated when the integrated voltage exceeds a threshold level.

Abstract: A continuous variable valve duration apparatus may include a cam shaft rotatably mounted to a cam carrier, a cam which is disposed to the cam shaft and relatively rotatable with respect to the cam shaft, and of which a rotation center thereof is variable with respect to a rotation center of the cam shaft, a connecting link which is disposed between the cam and the camshaft, is pivotally connected at least one of the cam and the camshaft, and transmits rotation of the camshaft to the cam, and a control portion selectively changes the rotation center of the cam.

Abstract: A camshaft adjusting device for an internal combustion engine including: a vane-type adjuster actuable by a pressure medium and which is rotationally fixed to a camshaft by a rotor and rotationally fixed to a crankshaft by a stator; a central valve has a displaceable valve body, by which a pressure medium is fed to the vane-type adjuster via a pump from a reservoir, the medium being selectively introduced into different working chambers and fed back from other working chambers to the reservoir, depending on the position of the valve body. The device includes a rolling bearing, by which the end section of the camshaft facing the vane-type adjuster is mounted in relation to a fixed housing wall. An axially oriented through-flow opening extends through the rolling bearing through which the pressure medium delivered by the pressure flows in an axial direction to the central valve.

Abstract: In a valve timing adjusting device, a second rotation body includes a second sun gear part provided inside of a first rotation body, and is connected to a drive shaft or a driven shaft through inside of the sprocket part to be rotated corresponding to the drive shaft or the driven shaft. When the second rotation body is brought into contact with the sprocket part, rotation of the second rotation body relative to the first rotation body is restricted. A planetary rotation body includes a first planetary gear part engaged with the first sun gear part, and a second planetary gear part engaged with the second sun gear part. The planetary rotation body makes a sun-and-planet motion inward of the first sun gear part and the second sun gear part to change a phase of the relative rotation between the first rotation body and the second rotation body.

Abstract: 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.

Abstract: A fluid flow control valve (10) having an elongated valve body (14) with a longitudinally extending aperture (14a) and a plurality of longitudinally spaced, radially extending ports (14b) formed therein. The valve body (14) includes an undercut portion (14c) located between two adjacent radially extending ports (14b). A valve spool (12) within the longitudinally extending aperture (14a) of the valve body (14) can be moved between first and second end limits of travel. The valve spool (12) has a plurality of lands (12a) and reduced diameter portions (12b) defining fluid passages (18) for fluid communication with selective radially extending ports (14b) of the valve body (14) depending on a longitudinal position of the valve spool (12) within the valve body (14). A longitudinally extending passage (12c) and a radially extending passage (12d) are formed in the valve spool (12).

Abstract: An oil control valve has a housing and a spool valve that is arranged in the housing and is movable in the axial direction. The movement range of the spool valve includes a first area and a second area. In the first area, a port that is connected to a lock mechanism opens to prevent the movement of a variable valve timing mechanism through drainage of oil from the lock mechanism. In the second area, oil is supplied and drained to and from the variable valve timing mechanism through a passage inside the spool valve. The first area exists at a position separated from the second area in the movement range.

Abstract: 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.

Abstract: A camshaft phaser includes an input member; an output member defining an advance chamber and a retard chamber with the input member; a valve spool moveable between an advance position and a retard position and having a valve spool bore with a phasing volume and a venting volume defined therein such that the phasing volume is fluidly segregated from the venting volume; and a phasing check valve within the valve spool. The advance position allows oil to flow through the phasing check valve and through the phasing volume from the advance chamber to the retard chamber while preventing oil from flowing from the retard chamber to the advance chamber and the retard position allows oil to flow through the check valve and through the phasing volume from the retard chamber to the advance chamber while preventing oil from flowing from the advance chamber to the retard chamber.

Abstract: A method may include thermally joining at least one of a non-round functional component to a shaft and a cam to a camshaft, elastically compressing the functional component during introduction of a round through-opening, and creating a through-opening which is not round when the functional component is unstressed and at least minimizes an asymmetrical deformation of the shaft after the thermal joining of the functional component to the shaft.

Abstract: A camshaft phaser, including: a drive sprocket; a stator; a rotor at least partially rotatable with the stator; a rotor extension fixedly connected to the rotor, having a slot at at least one outer circumferential position; a spring for biasing the rotor relative to the stator, having a first and a second end, the first end secured in the slot in the rotor extension and the second end secured on the stator.

Abstract: A hydraulic camshaft adjuster (1) including a stator (2) and a rotor (3) arranged such that it can rotate relative thereto, the stator (2) being connected to at least one separate cover (7) that seals a cavity (11) located between the rotor (3) and the stator (2). In the region of the cover (7), the material of the stator (2) at least partially encompassing said cover (7) is formed without machining.

Abstract: A camshaft phaser for an internal combustion engine having—a stator (1) driven by a crankshaft of the internal combustion engine; a rotor (3) connected to the camshaft (24) for co-rotation therewith; and working chambers, which are configured between the stator (1) and the rotor (3) and which are subdivided into pressure chambers (A, B) by vanes (18) that are associated with the rotor (3); and—a pressure medium circuit having a plurality of pressure medium channels (A1, B1, C1, E1) that fulfill different functions, at least two of the pressure medium channels (A1, B1, C1, D1) merging into one another in one section (14); and one of the pressure medium channels (A1, B1, C1, D1) being separated in a pressure medium-tight manner from the other pressure medium channel (A1, B1, C1, D1) by a guide sleeve (13) that is inserted into the section (14).

Abstract: A variable valve timing control apparatus includes a driving-side rotation member, a driven-side rotation member, an intermediate lock mechanism including first and second lock members, first and second recess portions, and a guide groove, a sensor, and a control portion. The control portion performs a control so that the relative rotation phase is changed until a first stop state is established in a state where the relative rotation phase is in an unlocked state and one of the first and second lock members is positioned relative to one of the first and second recess portions at which the guide groove is formed at a side opposite from a side where the guide groove is formed. The control portion reverses a change direction of the relative rotation phase after the first stop state is established so that the relative rotation phase is changed until a second stop state is established.

Abstract: A circuit assemblage and a method for evaluating signals of a crankshaft sensor and of a camshaft sensor of an internal combustion engine are provided, the times at which the signals occur being evaluated. A position signal of a shaft of the internal combustion engine is formed from the times. Storage units are provided which simultaneously store the occurrence times of the signals of the crankshaft sensor and the occurrence times of signals of the camshaft sensor. A decision unit is provided as to whether the position signal is formed from the occurrence times of the signals of the crankshaft sensor or from the occurrence times of the signals of the camshaft sensor.

Abstract: A four-cycle internal combustion engine has a permanent curtailed intake process, which allows the temperature and pressure of intake air to the combustion cylinders to be tightly controlled, and enables a very small combustion chamber so that a much higher compression ratio and pre-ignition compression pressure can be achieved without approaching the air/fuel mixture auto-ignition threshold. The maximum threshold of curtailed intake volume is determined to be 68% of engine cylinder volume to achieve a compression ratio CR of 22.1 or higher. Because this design can effectively regulate and set the maximum pre-ignition temperature of the fuel-air mixture, it can combust virtually any type of liquid hydrocarbon fuel without knocking. This four-cycle engine, due to its higher compression ratio, generates power equivalent to or greater than a standard four-cycle engine in a smaller and lighter engine and at a much higher efficiency.

Abstract: A camshaft adjuster (1) having a drive element (2) and an output element (3), wherein the drive element (2) and the output element (3) are arranged so as to be rotatable relative to one another and the camshaft adjuster (1) has a covering element (4) which is non-rotatably connected to the drive element (2) or to the output element (3), wherein the drive element (2) or the output element (3) has a bore (5) penetrated by a screw (6), wherein the screw (6) fastens the covering element (4) to the drive element (2) or to the output element (3), wherein the bore (5) tapers in the axial direction (13).

Abstract: An engine includes: an oil control valve built in a cylinder head, and configured to control a pressure of oil to be supplied to a variable valve mechanism via a camshaft; and a cam cap fixed to an upper face of the cylinder head, and configured to rotatably support the camshaft between the cam cap and the cylinder head, as a flow passage for the oil to be force-fed from an oil pump to the oil control valve, the cam cap including: a lateral passage formed inside the cam cap, and extended in a direction along the upper face of the cylinder head; and a downward passage extended downward from the lateral passage so as to serve as a downstream side flow passage of the lateral passage, and configured to guide the oil toward the oil control valve.

Abstract: The present disclosure relates to a method of determining an offset between a detector and a point on a motor, the movement of the point on the motor being impeded in at least one direction. In particular, this disclosure relates to a method of determining a commutation offset for an encoder that works in conjunction with a synchronous motor. The commutation offset is an offset between the detector and the north pole of a permanent magnet within the motor. The method comprises setting a test value for the offset, causing a displacement of the detector based on the test value and measuring that displacement. The method further comprises repeatedly increasing the test value, and causing and measuring a displacement for each so increased test value until it is determined that the test value has crossed a threshold.

Abstract: A control valve includes a valve case, a spool accommodated in the valve case, an electromagnetic solenoid operating the spool along a spool axis extending in a longitudinal direction, the valve case including a pump port, an advanced angle port, a retarded angle port, and an unlocking port, the spool being operated to at least five positions, and a lock control fluid passage formed inside the spool in an attitude along the spool axis, the lock control fluid passage allowing the fluid from the pump port to be supplied only to the unlocking port irrespective of the position of the spool when the spool is operated to any one of the positions at which the fluid is supplied from the pump port to the unlocking port.

Abstract: A cam phaser (10) dynamically adjusts a rotational relationship of a camshaft (24) of an internal combustion engine with respect to an engine crankshaft (34). A cam sprocket (20) can be driven by an endless loop power transmission member connected to a drive sprocket (36) mounted for rotation with the engine 5 crankshaft (34). The cam phaser (10) can include a planetary gear drive train (12) having a centrally located sun gear (14) connected for rotation with the cam sprocket (20), a ring gear (18) connected for rotation with the camshaft (24), and a plurality of planet gears (16a, 16b) supported by a carrier (22) in meshing engagement between the sun gear (14) and the ring gear (18). A phase adjustment gear (26) can be 10 connected for rotation with the carrier (22). The sun gear (14) can drive the planet gears (16a, 16b) in rotation thereby causing the ring gear (18) to be driven in rotation.

Abstract: A valve timing control apparatus includes a driving-side rotating member, a driven-side rotating member, a fluid pressure chamber defined by the driving-side rotating member and the driven-side rotating member and divided into a retarded angle chamber and an advanced angle chamber by a parting portion, an angle detecting portion detecting a relative angle of the driven-side rotating member relative to the driving-side rotating member, a fluid control mechanism controlling a supply and a discharge of an operation fluid to and from the fluid pressure chamber, an acceleration operation quantity detecting mechanism detecting an acceleration operation quantity, and a control portion setting either a normal drive mode or an acceleration drive mode as a control mode relative to the fluid control mechanism based on the acceleration operation quantity, and controlling the fluid control mechanism so that the relative angle corresponds to a target angle determined based on the set control mode.

Abstract: A valve timing control apparatus includes: a rear plate; a housing fixed to the rear plate; and a vane rotor which is able to rotate relative to the housing. The vane rotor includes a rotor and a vane extending from the rotor outward in a radial direction to divide an oil pressure chamber of the housing into an advance chamber and a retard chamber. The vane has an axial end surface adjacent to the rear plate and a radially outer surface. A first chamfer part is defined at a connection between the axial end surface and the radially outer surface of the vane so as to reduce a surface pressure applied from the rear plate to the vane.

Abstract: 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.

Abstract: A planet bearing has a single row of spherical rolling elements between an outer wheel and an inner wheel. A planet gear is supported by the outer wheel from a radially inner side. A planet carrier supports the inner wheel from a radially inner side. An elastic component is interposed between the inner wheel and the planet carrier. A driving rotor or a driven rotor has a thrust bearing part that supports the planet gear from one side in the axial direction. The outer wheel is in contact with the spherical rolling element at a rolling contact point and defines a contact angle on the one side in the axial direction.

Abstract: A camshaft phaser has a central-position locking device for locking the rotor in a central locking position relative to the stator. One or more of the vanes altogether have at least two pressure medium conduits each fluidically connect two working chambers of different directions of action. The pressure medium conduits have check valves of different directions of action which allow the pressure medium to be transferred in one direction and prevent it from being transferred in the respective opposite direction, depending on the direction of rotation of the rotor relative to the stator. A valve device is provided in the rotor hub, the at least one switchable valve device in one operating position allowing the working chambers between which transfer of pressure medium is prevented by the check valve or between which no check valve is provided to be fluidically connected to each other.

Abstract: A valve timing control apparatus includes a check valve, a filter, and a filter holding body. The check valve is placed between a camshaft and a vane rotor. The filter is placed between the camshaft and the check valve. The filter holding body includes a plurality of metal plates, which are stacked one after another. Two metal plates, which serve as enlarged space forming plates, are placed adjacent to the filter on one side of the filter where the camshaft is placed while each of the two metal plates includes enlarged through holes. A metal plate, which serves as an enlarged space forming plate, is placed adjacent to the filter on another side of the filter and includes enlarged through holes. A flow passage cross-sectional area of each enlarged through hole is larger than a flow passage cross-sectional area of a supply oil passage.

Abstract: 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.

Abstract: A camshaft adjusting device (19) having a camshaft adjuster (4), including a stator (36), a rotor (38) which can be rotated relative to the stator (36) about a rotational axis (74), and a hub (52) which is arranged on the rotor (38) or on the stator (36) and has a receiving cup (62), and having a camshaft (12) which is received in the receiving cup (62). It is provided here that the camshaft (12) is fixed radially in the receiving cup (62) via at least three spacer elements (64). A camshaft adjusting device (19) of this type can be produced simply and inexpensively.

Abstract: A camshaft phaser includes an input member; an output member defining a phasing advance chamber and a phasing retard chamber with the input member; and a rotary valve spool coaxially disposed within the output member such that the rotary valve spool is rotatable relative to the output member and the input member, the valve spool defining a rotary valve spool advance chamber and a rotary valve spool retard chamber. Oil supplied to the rotary valve spool advance chamber causes the rotary valve spool to rotate relative to the output member and relative to the input member in a retard direction and oil supplied to the rotary valve spool retard chamber causes the rotary valve spool to rotate relative to the output member and relative to the input member in an advance direction.

Abstract: A spool has a connection passage that connects a supply port and a discharge port with each other according to a position of the spool in an axial direction. A valve seat is arranged in the connection passage. The connection passage has a supply hole passing through the spool in a radial direction, and a discharge hole passing through the spool in the radial direction. The spool has a guide surface that guides a valve object to move in the axial direction while restricting a position of the valve object in the radial direction. The discharge hole is opened on the guide surface.

Abstract: A variable valve timing apparatus includes: a variable valve timing mechanism; an intermediate locking mechanism that locks the valve timing at an intermediate timing; and a hydraulic pressure supply device that hydraulically actuates these mechanisms. The hydraulic pressure supply device uses a single oil control valve to control a state where lubricating oil is supplied to or drained from each of an advance chamber, a retard chamber and an intermediate chamber of an intermediate locking mechanism. The oil control valve has first to fourth modes. The oil control valve advances the valve timing and actuates the intermediate locking mechanism in a projecting direction in the third mode, and, under a situation that the amount of lubricating oil supplied to the variable valve timing mechanism is smaller than that in the third mode, advances the valve timing and actuates the intermediate locking mechanism in a release direction in the fourth mode.

Abstract: A control valve includes a spool formed with a fluid passage allowing a circulation of an operation fluid for switching a supply of the operation fluid to plural operation fluid supply portions, a cylindrical sleeve including plural supply and exhaust ports supplying and exhausting the operation fluid to and from the plural operation fluid supply portions and plural drain ports allowing the operation fluid returning from the plural operation fluid supply portions to drain, the sleeve slidably accommodating the spool therein, a solenoid mechanism for changing a position of the spool relative to the sleeve, and a communication portion formed on an outer periphery surface of the sleeve, the communication portion connected to plural drain ports.

Abstract: A camshaft adjuster having a stator drivable by a crankshaft, and a rotor which can be rotationally fixedly connected to a camshaft and having a plurality of vanes projecting radially outward from a radially inner ring, and a torsion spring acting between the rotor and the stator and having spiral turns, which is connected to the rotor by a first radially inner spring end, and to the stator by a second radially outer spring end, and arranged at an axial end of the rotor and of the stator and is secured by a securing part covering the turns laterally toward the outer side, wherein on the rotor, in a radially inner section of the vanes axially projecting pins are provided, arranged on a radially inner section of the rotor and, on the radially inner side of the innermost turn, projecting through the torsion spring.

Abstract: Provided is a camshaft phaser (1) having a driving member (2), a driven member (3), and a spring (4). The spring (4) is axially preloaded in the spring cavity (5).

Abstract: An electronic active lock pin control method may include checking whether a default position of a lock pin is present, determining whether the checked default position of the lock pin is due to lock pin parking or limphome, entering the default position of the lock pin into an active mode at a time of the lock pin default position by the lock pin parking, while entering the default position of the lock pin into a passive mode at a time of the lock pin default position by the limphome, and performing a phase control mode to track the middle phase type CVVT target value after the passive mode or the active mode.

Abstract: A control valve for a hydraulic device, in particular central valve of a camshaft adjuster system for reciprocating-piston internal combustion engines, having a valve sleeve (1) which projects into a cavity of a camshaft (8), wherein a displaceable control piston (3) is arranged in the valve sleeve (1), which control piston is subjected to load on one side by a spring (4) which is adjoined by a pressure medium line. The cavity of the camshaft (8) is connected to a pressure medium supply channel of the reciprocating-piston internal combustion engine via at least one supply line (16) in the camshaft (8) and via a bearing, and the pressure medium line is in the form of a pressure medium feed line and the pressure medium feed line is connected to the pressure medium supply channel of the reciprocating-piston internal combustion engine via a pressure line (12) in the camshaft (8) and via the bearing.

Abstract: Bolts are respectively inserted through through-holes of a sun gear and are respectively threadably inserted into threaded holes of a driving-side rotatable body. The bolts are placed on an outer side of a first internally toothed portion of the sun gear in a radial direction and fix the sun gear and the driving-side rotatable body together. The sun gear includes press-fitting parts, each of which is press-fitted to a corresponding one of press-fitting projections of the driving-side rotatable body at a corresponding location that is located between corresponding adjacent two of the bolts in a circumferential direction, and open parts, each of which is placed at a corresponding location that overlaps with a corresponding one of the bolts in the circumferential direction, while a corresponding predetermined space is located adjacent to each of the open parts on an outer side of the open part in the radial direction.

Abstract: A camshaft adjuster (1) has a plurality of locking mechanisms (5) arranged on different pitch circles concentrically with respect to the axis of rotation (7) of the camshaft adjuster (1).

Abstract: In a definition cross-section of a planet gear located on an eccentric side in a radial direction relative to a driving rotor and a driven rotor, an imaginary straight line is defined by connecting a center of a planet side outer arc part that configures a raceway groove of a planet outer wheel on the eccentric side to a center of a solar side outer arc part that configures a raceway groove of a solar outer wheel on an opposite side opposite from the eccentric side. A planet side inner arc part of a planet inner wheel and a solar side inner arc part of a solar inner wheel are located on the imaginary straight line in the definition cross-section.

Abstract: A camshaft phaser includes a stator having a plurality of lobes; a rotor coaxially disposed within the stator and having a plurality of vanes interspersed with the lobes defining advance chambers and retard chambers; a camshaft phaser attachment bolt for attaching the camshaft phaser to a camshaft, the camshaft phaser attachment bolt defining a valve bore that is coaxial with the stator. A supply passage extends radially outward from the valve bore and includes a downstream end that is proximal to the valve bore and an upstream end that is distal from the valve bore and separated from the downstream end by a check valve seat. A check valve member in the supply passage is biased toward the check valve seat by centrifugal force. A valve spool is moveable within the valve bore such that the valve spool directs oil that has passed through the supply passage.

Abstract: A hydraulic valve for use with a lockable cam phaser. The hydraulic valve is configured to limit the flow of pressure medium to both the advance and retard chambers, while allowing a locking pin of the cam phaser to drain. The hydraulic valve effectively limits flow during the self-centering operation of the can phaser. This is important for the system function, since it allows the phaser to select a side (i.e., the advance or retard chamber) to bleed off, reducing pressure on that side, which allows the cam phaser to move towards the mid-park (i.e., locking) position.