Abstract: A variable cam timing phaser includes a housing disposed about an axis and having an inner housing surface defining a housing interior. The variable cam timing phaser includes a rotor moveable between an advance position and a retard position. The rotor includes a hub and a vane, with the rotor and the housing defining a chamber. The vane further defines the chamber into an advance chamber and a retard chamber. The variable cam timing phaser also includes a control valve assembly including a valve housing and a control piston. The variable cam timing phaser also includes a chamber biasing assembly disposed in one of the advance and the retard chambers and configured to bias the rotor into a predetermined position between the advance and the retard positions. The chamber biasing assembly includes a chamber piston, a chamber biasing member, and a chamber check valve.

Abstract: A variable cam timing phaser includes a housing disposed about an axis and having an inner housing surface defining a housing interior. The variable cam timing phaser includes a rotor moveable between an advance position and a retard position. The rotor includes a hub and a vane, with the rotor and the housing defining a chamber. The vane further defines the chamber into an advance chamber and a retard chamber. The variable cam timing phaser also includes a control valve assembly including a valve housing and a control piston. The variable cam timing phaser also includes a chamber biasing assembly disposed in one of the advance and the retard chambers and configured to bias the rotor into a predetermined position between the advance and the retard positions. The chamber biasing assembly includes a chamber piston, a chamber biasing member, and a chamber check valve.

Abstract: A variable valve actuation assembly for actuation of an engine intake valve between low-lift and high-lift modes. The VVA assembly includes a special rocker assembly having a pivotable central high-lift cam follower and two peripheral low-lift cam followers; a camshaft having low-lift and high-lift lobes engageable with the respective cam followers; a primary latching assembly including a slidable primary latching pin in the rocker assembly for engaging and disengaging the high-lift follower; a solenoid for causing the primary latching pin to be engaged and disengaged; and a secondary latching mechanism between the solenoid and the primary latching pin to automatically limit engagement and disengagement of the primary latching pin to times in the duty cycle of the camshaft (during lift events) when ejections of the primary latching pin are not possible.

Abstract: A variable valve actuation assembly for actuation of an engine intake valve between low-lift and high-lift modes. The VVA assembly includes a special rocker assembly having a pivotable central high-lift cam follower and two peripheral low-lift cam followers; a camshaft having low-lift and high-lift lobes engageable with the respective cam followers; a primary latching assembly including a slidable primary latching pin in the rocker assembly for engaging and disengaging the high-lift follower; a solenoid for causing the primary latching pin to be engaged and disengaged; and a secondary latching mechanism between the solenoid and the primary latching pin to automatically limit engagement and disengagement of the primary latching pin to times in the duty cycle of the camshaft (during lift events) when ejections of the primary latching pin are not possible.

Abstract: A valve actuator subassembly, such as a finger follower and a hydraulic lash adjuster or a rocker arm and push rod, are held together for shipping and installation in an engine valve train by a retainer clip made of wire or sheet, metal or plastic material. The retainer clip includes a U-shaped body having first and second nearly parallel legs interconnected at first ends by a resilient portion. The legs are adapted to resiliently engage opposite sides of a wall of a rockable actuator member having a raised portion on a first side aligned with a socket on a second side. The first leg includes a guide recess adjacent a second end and adapted to guidingly engage the raised portion on the first side of the wall.