Patent ID: 8627791

Claim:
A system for actuating first and second engine valves associated with the same engine cylinder, 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 the first and second engine valves 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 adjacent to the primary rocker arm, said auxiliary rocker arm being adapted to receive motion from the means for imparting auxiliary valve actuation motion; a master piston disposed in a master piston bore in the primary rocker arm; a slave piston disposed in a slave piston bore in the primary rocker arm, said slave piston positioned so as to provide auxiliary valve actuation motion to only the first of the first and second engine valves; a control valve disposed in a control valve bore in the primary rocker arm; and a hydraulic circuit connecting the master piston bore, the slave piston bore and the control valve bore.