Engine valve actuator

Details Engine valve actuator Engine valve actuator

2006-02-14

2006-02-14

Denion, Thomas (Department: 3748)

Internal-combustion engines

Poppet valve operating mechanism

Hydraulic system

C123S090150, C123S090160, C123S090630, C123S19800E, C251S101000, C251S102000, C092S013600, C092S013800

Reexamination Certificate

active

06997148

ABSTRACT:
An engine valve actuator for an internal combustion engine is provided. The actuator includes a housing having an opening. An adjustment member is disposed in the housing and defines a fluid chamber having a chamber wall. A piston is also disposed in the opening. The piston defines a piston chamber and has a pressure surface, a protrusion extending from the pressure surface, and a groove disposed in the pressure surface surrounding the protrusion and in fluid communication with the piston chamber. A fluid passageway is adapted to controllably communicate pressurized fluid to the housing opening. A push rod is operatively engageable with the piston and is adapted to controllably actuate an engine valve of the engine.

REFERENCES:
patent: 5161501 (1992-11-01), Hu
patent: 5511460 (1996-04-01), Custer
patent: 6273057 (2001-08-01), Schwoerer et al.
patent: 6302370 (2001-10-01), Schwoerer et al.
patent: 6474296 (2002-11-01), Cornell et al.
patent: 6708656 (2004-03-01), Chang

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