Patent ID: 7971569
Filing Date: 2011-07-05
Classification: F01L,F02M

Abstract:
1. A lost motion valve actuation system comprising: an engine brake housing; one or more hydraulic fluid supply passages extending through the housing; a solenoid valve communicating with at least one of said fluid supply passages; a master piston slidably disposed in a master piston bore provided in the housing wherein said master piston bore communicates with at least one of said fluid supply passages; a slave piston slidably disposed in a slave piston bore provided in the housing wherein said slave piston bore is connected to said master piston bore by a fluid passage; an engine brake rocker arm disposed on a rocker shaft, said rocker arm having a master piston contact surface and a bias mechanism contact surface; a bias mechanism disposed in the housing, said bias mechanism including a bias piston disposed within a bias piston bore extending through said housing and wherein said bias piston extends from said housing to contact with said bias mechanism contact surface; a control valve communicating with at least one of said fluid supply passages; and a cam having a cam lobe adapted to impart engine braking motion to said rocker arm.