Patent ID: 8726863

Claim:
A system for actuating one or more engine valves, comprising: a rocker shaft having a hydraulic fluid supply circuit extending through the rocker shaft to a port on the outer surface of the rocker shaft; a solenoid valve adapted to selectively supply hydraulic fluid to the rocker shaft hydraulic fluid supply circuit; a lost motion housing disposed about the rocker shaft, wherein the lost motion housing is incorporated into a rocker shaft pedestal, said lost motion housing having a lower pedestal portion adapted to contact a cylinder head, an actuator piston bore, a control valve bore, and an internal hydraulic circuit extending from the actuator piston bore to the control valve bore and from the control valve bore to the port on the outer surface of the rocker shaft; means for securing the lost motion housing in a fixed position relative to the rocker shaft; an actuator piston assembly disposed in the actuator piston bore; a control valve assembly disposed in the control valve bore; and external hydraulic fluid tubing provided between the solenoid valve and the control valve.