A recess hole is connected to a radially outer side of an oil passage portion and forms an oil supply passage. A check valve part has: a valve seat portion provided in the oil passage portion to form a valve seat; a sleeve having one end connected to the valve seat portion; a lateral hole to communicate an internal space of the sleeve with outside of the sleeve; and a valve body provided in the sleeve so as to be separated from the valve seat or in contact with the valve seat. The lateral hole has an opening exposed to outside of the sleeve, and a range of the opening overlaps with a range of the recess hole in an axial direction of the sleeve.

Methods and systems are provided for a phase control apparatus in a variable cam timing (VCT) system of an engine, the phase control apparatus having a locking pin coupled to a rotor vane and engageable with a locking pin recess in the phase control apparatus cover plate. In one example, a method for assembling the phase control apparatus may include positioning respective retarded side surfaces of the rotor vane and the housing in face-sharing contact while positioning respective retarded side surfaces of the locking pin and the locking pin recess in face-sharing contact and maintaining a backlash gap between only the advanced side surfaces of the locking pin recess.

A camshaft phaser is provided that includes a rotor, a stator, and a locking cover. The rotor is selectively locked to the stator via a locking assembly arranged within a locking bore of the rotor. Contaminant particles that enter a first locking end of the bore are exited out a second venting end of the bore via a contaminant particle exit pathway.

The present disclosure relates to a cam phase adjuster that includes a stator, a rotor, a front cover and at least one locking pin. The cam phase adjuster is provided with a plurality of compartments formed between the rotor and the stator, and each compartment is divided into advance cavities and retard cavities in a circumferential direction; each locking pin is mounted in a corresponding mounting hole of the rotor; an end portion of each locking pin that faces away from the front cover abuts against the bottom of the corresponding mounting hole by means of a corresponding elastic reset member; an end face of the front cover that faces the rotor is provided with at least one locking groove which matches the at least one locking pin; the end portion of each locking pin that faces the front cover can be axially inserted into the corresponding locking groove; and the front cover is provided with an unlocking flow channel which fluidly connects the corresponding locking groove to one advance cavity or retard cavity.

A cam phasing control motor assembly, including: an electric motor with a hollow drive shaft; an actuating pin passing through the hollow drive shaft; an engagement feature; and a displacement assembly. For a camshaft locking mode: the displacement assembly displaces the actuating pin in a first axial direction to non-rotatably connect the engagement feature with a bolt non-rotatably connected to a camshaft; and the camshaft is arranged to non-rotatably connect to an input gear for a gearbox phasing unit, the input gear arranged to receive torque from an engine. For a phase adjusting mode: the displacement assembly displaces the actuating pin in a second axial direction, opposite the first axial direction, to disconnect the engagement feature from the bolt; and the camshaft is arranged to rotate with respect to the input gear.

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.

Methods and devices are provided for locking and unlocking a phase control apparatus. In one example, a phase control apparatus is provided with a locking plate including a drive wheel, a pin recess, and a ramped channel opening into the pin recess and a housing coupled to the locking plate. The phase control apparatus also includes a vane rotor including a vane and positioned in a hydraulic chamber of the housing and a locking pin positioned within a bore of the vane and movable into a locked position where the locking pin engages with the pin recess.

A variable camshaft timing device that adjusts phase between a camshaft and a crankshaft includes a planetary gear assembly that changes an angular position of the camshaft relative to an angular position of the crankshaft; a sun gear configured to receive an output shaft of an electric motor that rotates at least a portion of the planetary gear assembly and controls phase adjustment between the camshaft and crankshaft by angularly displacing the camshaft with respect to the crankshaft; and a hydraulic lock (82) that releasably engages a portion of the variable camshaft timing device (10) in response to force applied by pressurized fluid thereby selectively preventing rotation of the camshaft relative to the crankshaft.

A hydraulic camshaft adjuster of the vane cell type, including a rotor and a stator and including a cover having fastening holes extending all the way through for accommodating fasteners. Via the fasteners the cover is fastened at an end face to the stator. The cover has a locking hole, into which a locking pin accommodated in the rotor can be displaced in an axial direction in order to lock the rotor in relation to the stator. The position of the locking pin in the rotor is pivoted about the axis of rotation by an angle in relation to a fastener when the camshaft adjuster is used as an exhaust adjuster, the position of the locking pin in the rotor is pivoted about the axis of rotation by an angle in relation to a fastener when the camshaft adjuster is used as an intake adjuster, and the position of the locking hole in the cover is pivoted about the axis of rotation by an angle in relation to the position of a fastening hole, wherein the rotor and the stator are coordinated with each other in such a way that the angles , , and are equal in magnitude and the pivoting directions of the angle and are oppositely directed.

An engine variable camshaft timing phaser (10) includes a sprocket (12) and a planetary gear assembly (14). The sprocket (12) receives rotational drive input from an engine crankshaft. The planetary gear assembly (14) includes two or more ring gears (26, 28), multiple planet gears (24), a sun gear (22), and a wrap spring (76). One of the ring gears (26, 28) receives rotational drive input from the sprocket (12) and one of the ring gears (26, 28) transmits rotational drive output to an engine camshaft. The sun gear (22) engages with the planet gears (24). The wrap spring (76) experiences expansion and contraction exertions to permit advancing and retarding engine valve opening and closing, and to prevent advancing and retarding engine valve opening and closing.