Patent ID: 6422186
Filing Date: 2002-07-23
Classification: F01L,F02D

Abstract:
A system for controlling the actuation of an internal combustion engine valve to achieve compression-release braking or exhaust gas recirculation, said system comprising:means for supplying energy to an engine rocker arm; an engine rocker arm shaft including an internal hydraulic passage; an engine rocker arm mounted on the shaft, said rocker arm having a first end in operative contact with the energy supplying means, a piston recess in a second end, and a control valve recess intermediate said first and second ends, said rocker arm being adapted to rock cyclically on said shaft; a lost motion piston slidably disposed in the piston recess; an hydraulic control valve disposed in the control valve recess, said control valve being adapted to reset responsive to the rocking movement of the rocker arm to a predetermined position; means for changing the predetermined position of the rocker arm at which control valve resetting occurs; and an hydraulic subcircuit provided in the rocker arm; said subcircuit providing selective hydraulic communication between the shaft internal passage, the control valve, and the piston recess.