Valve timing control system for internal combustion engine with

Details Valve timing control system for internal combustion engine with Valve timing control system for internal combustion engine with

1991-01-28

1992-05-19

Cross, E. Rollins

Internal-combustion engines

Poppet valve operating mechanism

With means for varying timing

123 9031, 464 2, F01L 134

Patent

active

051138140

ABSTRACT:
A valve timing control system includes an engine revolution synchronous element driven in synchronism with engine revolution and a camshaft synchronous element rotating together with a camshaft. A phase adjusting means disposed between the engine revolution synchronous element and the camshaft synchronous element. The phase adjusting means includes movable gear member which is thrustingly movable to determine phase relationship between the engine revolution synchronous element and the camshaft synchronous element, and a hydraulic means for driving the movable gear member to a desired position. The hydraulic means is connected to a fluid pressure source via a hydraulic circuit. A check valve is disposed in the hydraulic circuit for preventing surge flow of the pressurized fluid from the hydraulic means toward the fluid pressure source.

REFERENCES:
patent: 4601266 (1986-07-01), Oldfield et al.
patent: 4627825 (1986-12-01), Bruss et al.
patent: 4858572 (1989-08-01), Shirai et al.
patent: 4889086 (1989-12-01), Scapecchi et al.

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