Engine brake having an articulated rocker arm and a rocker...

Details Engine brake having an articulated rocker arm and a rocker... Engine brake having an articulated rocker arm and a rocker...

2008-03-14

2010-11-02

Eshete, Zelalem (Department: 3748)

Internal-combustion engines

Poppet valve operating mechanism

With means for varying timing

C123S090150, C123S090390

Reexamination Certificate

active

07823553

ABSTRACT:
A system for actuating an engine valve is disclosed. The system may include a lost motion housing having two spaced collars surrounding a rocker shaft. The lost motion housing may include an internal hydraulic circuit connecting a master piston bore with a slave piston bore. The lost motion housing may include a means for securing the lost motion housing in a fixed position relative to the rocker shaft. A master piston may be disposed in the master piston bore and a slave piston may be disposed in the slave piston bore. A rocker arm may be disposed on the rocker shaft between the spaced collars and may have a first portion adapted to contact a cam and a second portion adapted to contact the master piston. In a preferred embodiment, the system may be used to provide compression release engine braking or bleeder engine braking.

REFERENCES:
patent: 5592907 (1997-01-01), Hasebe et al.
patent: 6394067 (2002-05-01), Usko et al.
patent: 6883492 (2005-04-01), Vanderpoel et al.
patent: 2005/0126522 (2005-06-01), Ruggiero

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