A variable camshaft timing (VCT) assembly for changing the angular position of concentric camshafts relative to a crankshaft includes a coupling plate having a first plurality of Oldham features configured to engage a first plurality of Oldham receiving features carried by a first VCT device and a second plurality of Oldham features configured to engage a second plurality of Oldham receiving features carried by a second VCT device; the coupling plate is positioned axially between the first VCT device and the second VCT device permitting the first VCT device and the second VCT device to move radially outwardly and inwardly relative to an axis of camshaft rotation.

A vane type cam phaser for an internal combustion engine, the vane type cam phaser including a stator and a rotor that is rotatable relative to the stator to adjust a phase angle of a camshaft; a spring element configured to align the rotor with the stator in an idle position; a spring adapter that is arranged between the spring element and the rotor and an axial fixing device that fixes the spring adapter at the rotor.

A variable camshaft phaser is provided having a stator attached to a driving part, and a rotor located within the stator and attached to a driven part. First and second cover plates are located on respective first and second axial sides of the stator. Inwardly directed vanes of the stator, the rotor, and the first and second cover plates define at least one chamber. Radially outwardly directed vanes of the rotor divide the at least one chamber into an advance side working chamber and a retard side working chamber. A locking pin bore is located in the rotor, and a locking pin is located in the locking pin bore. One of the first and second cover plates includes a locking pin receiving opening. A magnetic part is located in the locking pin receiving opening to remove metallic particles and contaminants from the flow of pressurized hydraulic fluid.

A cam phaser for an internal combustion engine, the cam phaser including a stator including vane cells; a rotor configured rotatable relative to the stator and including vanes arranged in the vane cells of the stator, wherein the vanes respectively divide the vane cells into advance chambers and retard chambers; a control valve configured to move the rotor at least between an advance position and a retard position, wherein the control valve includes a hollow piston that is axially movable within a piston channel, a pressure medium connection, a tank connection and at least four operating connections including at least one advance connection and at least one retard connection, wherein each of the vane cells includes an advance chamber that is connected to the control valve through the at least one advance connection and a retard chamber connected to the control valve through the at least one retard connection.

An oil passage switching valve suitable for a valve timing changing apparatus includes: a valve body, opening or closing an oil passage of operating oil; an urging spring, urging to position the valve body to a position corresponding to the retard position in a pause state; and a switching element, positioning the valve body to a position corresponding to the retard position when a state quantity of the operating oil is in a first range, and switching a position of the valve body in response to the state quantity (pressure or temperature) of the operating oil while resisting an urging force of the urging spring to position the valve body to a position corresponding to the advance position when the state quantity of the operating oil is in a second range greater than the first range.

A camshaft phaser is provided that includes a stator and a rotor having a locking assembly. The locking assembly has a first unlocked position and a second locked position and is configured to roll against the stator in the first unlocked position and lock the rotor to the stator in the second locked position. The locking assembly can include a locking pin, a retention insert, and a rolling element arranged within the retention insert.

A hydraulic fluid control valve (HFCV) configured to recirculate an exiting hydraulic fluid from a first hydraulic actuation chamber to a second hydraulic actuation chamber is provided. The HFCV includes a selectively movable spool having an inner fluid chamber configured to receive and deliver the exiting hydraulic fluid to one or both of either a sump or one of the first or second hydraulic actuation chambers.

The disclosure relates to a hydraulic camshaft adjuster for the variable adjustment of the control times of gas exchange valves of an internal combustion engine, having a stator and a rotor rotatable relative to the stator. Radially inwardly projecting webs are formed on the stator and radially outwardly projecting vanes are formed on the rotor. Between the stator and the rotor are formed several hydraulic working chambers, each of which is divided into a first working chamber and a second working chamber by a vane of the rotor. Two locking elements are inserted into the rotor for the temporary, reversibly detachable fixing of the rotor relative to the stator in a middle position. The first locking element and the second locking element can be locked in a common locking slotted guide. The disclosure also relates to a method for locking of the rotor in such a hydraulic camshaft adjuster.

A camshaft phaser includes a stator having a plurality of lobes; a rotor coaxially disposed within the stator, the rotor having a plurality of vanes interspersed with the plurality of lobes defining a plurality of advance chambers and a plurality of retard chambers such that the plurality of advance chambers and the plurality of retard chambers are arranged in an alternating pattern and such that the rotor rotates within the stator from a full advance position to a full retard position; and a supply passage in continuous fluid communication with one of the plurality of advance chambers, the supply passage being in continuous fluid communication with an oil source.

A hydraulic camshaft phaser including: a stator including a surface facing radially outwardly, and defining a recess; a rotor arranged to be non-rotatably connected to a camshaft and rotatable with respect to the stator; a spiral spring disposed in the recess and including a first end non-rotatably connected to the rotor and a second end non-rotatably connected to the stator; and a resilient cover plate directly connected to the surface facing radially outwardly, enclosing the spiral spring in the recess, and circumferentially preloaded. A hydraulic camshaft phaser including: a stator: arranged to receive rotational torque and defining a recess and a groove; a rotor rotatable with respect to the stator; a spiral spring disposed in the recess; and a resilient cover plate including a portion disposed in the groove, enclosing the spiral spring in the recess, and compressively engaging the stator in a radially inward direction.