Patent ID: 7712449
Filing Date: 2010-05-11
Classification: F01L,F02D

Abstract:
1. A system for actuating an internal combustion engine exhaust valve to provide compression release actuation during an engine braking mode of engine operation and early exhaust valve opening actuation during a positive power mode of engine operation, said system comprising: a first cam having a compression release lobe and an early exhaust valve opening lobe; a hydraulic lost motion system operatively contacting said first cam, said hydraulic lost motion system including a first rocker arm; a hydraulically actuated piston extending from said hydraulic lost motion system, said hydraulically actuated piston adapted to provide said exhaust valve with compression release actuation during an engine braking mode of engine operation and early exhaust valve opening actuation during a positive power mode of operation; a second cam having a main exhaust lobe; and a main exhaust rocker arm operatively contacting said second cam and adapted to provide a main exhaust actuation to said exhaust valve.