Abstract: A belt tensioner for automatically tightening a belt of a motor vehicle. The belt tensioner includes a tensioner mechanism including a hub, an inner casing and an outer casing. The outer casing is movably mounted to the inner casing. The hub is freely mounted for rotation to the outer casing and for contacting the belt and selectively tightening and loosening the belt in response to movement of the outer casing relative to the inner casing in first and second directions, respectively. The belt tensioner further includes a biasing mechanism for providing a torque force to the outer casing in the first direction. The belt tensioner additionally includes a one-way clutch mechanism normally resisting movement of the outer casing relative to the inner casing in the second direction. An exteriorly accessible rotatably member is associated with the one-way clutch mechanism for selectively deactivating the one-way clutch mechanism to prevent movement of the inner casing in the second direction.

Abstract: A variable valve selection assembly for an engine valve train of an engine cylinder head which has dual camshafts and two valves associated with each camshaft per cylinder. The variable valve selection assembly includes two end rocker arms and a middle rocker arm and a selectively actuated latching mechanism operative between an end rocker arm and the middle rocker arm so as to selectively link an end rocker arm with said middle rocker arm whereby an end rocker arm moves independently of said middle rocker arm in some modes of operation and whereby an end rocker arm moves in common with said middle rocker arm in other modes of operation.

Abstract: A fluid inletting system for a hydaulically actuated variable valve selection assembly for an engine valve train of an engine cylinder head with dual camshafts and two valves associated with each camshaft per cylinder. The latching mechanisms associated with the rocker arms are activated by pressurized engine lubricating oil which is introduced to the interior of the tubular support shaft for application against the end of the cylindrical portion of the latching member. The support shafts for each cylinder are supported by bosses of the cylinder head and aligned end to end with thin washer or spacer members between the ends of adjacent shafts to define separate oil passages in two adjacent shafts.