Patent ID: 7392772

Claim:
A system for actuating an engine valve comprising: a rocker arm shaft; a means for imparting primary valve actuation motion; a primary rocker arm disposed on the rocker arm shaft, said primary rocker arm being adapted to actuate an engine valve and receive motion from the means for imparting primary valve actuation motion; a means for imparting auxiliary valve actuation motion; an auxiliary rocker arm disposed on the rocker arm shaft adjacent to the primary rocker arm, said auxiliary rocker arm having a first end adapted to receive motion from the means for imparting auxiliary valve actuation motion and a second end distal from the auxiliary rocker arm first end; a hydraulic actuator piston disposed between the second end of the auxiliary rocker arm and the primary rocker arm, said actuator piston being adapted to selectively transfer one or more auxiliary valve actuation motions from the auxiliary rocker arm to the primary rocker arm; and means for locking the hydraulic actuator piston in a fixed position relative to the auxiliary rocker arm or the primary rocker arm during a time that the auxiliary rocker arm receives motion from the means for imparting auxiliary valve actuation motion.