Patent ID: 8651079
Filing Date: 2014-02-18
Classification: F01L

Abstract:
1. A valve operating mechanism for an internal combustion engine, the internal combustion engine including a valve operating cam for engaging a valve stem of a valve slidably supported in a valve body, the valve being biased by a spring in a direction to abut the operating cam and having an active state and a deactive state, the valve operating mechanism comprising: a lash adjuster supported by the valve body; a pin housing housed in the lash adjuster and together with the lash adjuster defining a lash adjustment chamber, the pin housing including a supply passageway, a drain trigger passageway and a drain for the flow of pressurized oil; a sync pin slidably received within the pin housing between an activating position and a deactivating position, the sync pin having a pin body including a valve stem contact surface for selectively engaging the valve stem and a valve stem through hole adjacent the contact surface for selectively facing the valve stem, the sync pin body further including a first fluid path and a second fluid path for the flow of pressurized oil; and a ball valve assembly provided within the pin housing, the ball valve assembly moveable between an open position where the ball valve assembly is in fluid communication with the lash adjustment chamber and a closed position, wherein the valve operating mechanism is operable in one of an active mode and a deactive mode, wherein in the active mode the sync pin is in the activating position, the valve is in the active state and the valve operating mechanism is configured to adjust valve lash, wherein in the deactive mode the sync pin is in the deactivating position and the valve is in the deactive state, and wherein the valve operating mechanism is configured to generate valve lash to allow the valve operating mechanism to move between the active mode and the deactive mode.