Variable valve timing system

Details Variable valve timing system Variable valve timing system

2007-04-03

2007-04-03

Chang, Ching (Department: 3748)

Internal-combustion engines

Poppet valve operating mechanism

With means for varying timing

C123S090150, C123S090170

Reexamination Certificate

active

11172046

ABSTRACT:
A variable valve timing system in which the cam shaft is rotated with respect to the crankshaft position by moving a shaft disposed interior to the cam shaft longitudinally has been developed. The variable valve timing system provides for varying the timing of the opening and closing of an engine's poppet valves (relative to the crankshaft angular position) to enhance the engine's efficiency and output. The timing system can be used with both intake and exhaust valves in both diesel and gasoline engines. The timing system is inexpensive to produce, and performs reliably over a lengthy period of time.

REFERENCES:
patent: 5673659 (1997-10-01), Regueiro
patent: 6216654 (2001-04-01), Regueiro
U.S. Appl. No. 10/821,331, unpublished, Mobley.

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