Valve actuation system and method of driving two slave...

Details Valve actuation system and method of driving two slave... Valve actuation system and method of driving two slave...

2006-12-12

2010-02-23

Chang, Ching (Department: 3748)

Internal-combustion engines

Poppet valve operating mechanism

Hydraulic system

C091S392000

Reexamination Certificate

active

07665432

ABSTRACT:
Apparatus and methods for hydraulic valve actuation of engine valves are disclosed. An exemplary embodiment of the present invention may include a plurality of slave piston assemblies that impart motion to the engine valves, wherein the motion is operable to open and close the engine valves. A dual diameter master piston assembly may be used to drive the plurality of slave pistons. The dual diameter master piston assembly may be divided into two or more elements with, for example, a spring bias or a button and T-slot assembly to hold the two elements together.

REFERENCES:
patent: 5746175 (1998-05-01), Hu
patent: 5852997 (1998-12-01), Vanderpoel
patent: 6112710 (2000-09-01), Egan et al.
patent: 6321701 (2001-11-01), Vorih et al.
patent: 6920868 (2005-07-01), Ruggiero et al.

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