Abstract: A rocker arm shaft retainer includes an elongated contoured sheet-like body having two opposite ends, two opposite sides longer in length than the ends, and a central portion between the sides. A plurality of fingers extend from the central portion towards the sides and each finger has a contoured recess for engaging a rocker shaft. The fingers define slots for receiving rocker arms. The retainer further includes a plurality of thrust faces along edges of the fingers for axial positioning of rocker arms on a rocker shaft. A plurality of bosses are also disposed on the fingers, each of the bosses having a generally flat surface.

Abstract: An engine accessory belt drive includes a self-aligning pulley assembly including a relatively stationary outer assembly and a universally pivotable inner assembly supported by the outer assembly and able to be locked in position by tightening of a fastener. During alignment of the self-aligning pulley with the belt, the fastener is maintained in the loose position, allowing limited universal pivoting of the rotational axis of the pulley as a result of belt tension forces which act to align the pulley. After the pulley is aligned, the fastener is tightened to fix the rotational axis of the pulley and the inner assembly in the aligned position of the pulley. Features of the inner and outer assemblies of the pulley assembly are also described.

Abstract: A rocker arm assembly includes an inner rocker arm and an outer rocker arm. The outer rocker arm includes two rail portions spaced a distance apart and forming an open space therebetween. The inner rocker arm is pivotably connected to the outer rocker arm such that it is at least partially within the open space. The inner rocker arm includes a locking pin housing containing two locking pins selectively engageable with holes in each of the rail portions to selectively prevent relative movement between the inner rocker arm and the outer rocker arm. The rocker arm assembly enables two-step valve operation and has a design characterized by compact size and improved manufacturability.

Abstract: An engine accessory belt drive includes a self-aligning pulley assembly including a relatively stationary outer assembly and a universally pivotable inner assembly supported by the outer assembly and able to be locked in position by tightening of a fastener. During alignment of the self-aligning pulley with the belt, the fastener is maintained in the loose position, allowing limited universal pivoting of the rotational axis of the pulley as a result of belt tension forces which act to align the pulley. After the pulley is aligned, the fastener is tightened to fix the rotational axis of the pulley and the inner assembly in the aligned position of the pulley. Features of the inner and outer assemblies of the pulley assembly are also described.

Abstract: A rocker arm assembly includes an inner rocker arm and an outer rocker arm. The outer rocker arm includes two rail portions spaced a distance apart and forming an open space therebetween. The inner rocker arm is pivotably connected to the outer rocker arm such that it is at least partially within the open space. The inner rocker arm includes a locking pin housing containing two locking pins selectively engageable with holes in each of the rail portions to selectively prevent relative movement between the inner rocker arm and the outer rocker arm. The rocker arm assembly enables two-step valve operation and has a design characterized by compact size and improved manufacturability.