Valve timing control device

Details Valve timing control device Valve timing control device

1998-10-28

2000-03-21

Lo, Wellun

Internal-combustion engines

Poppet valve operating mechanism

With means for varying timing

123 9031, 123 9065, F01L 1344

Patent

active

060390166

ABSTRACT:
A valve timing control device incorporates a cam shaft rotatably assembled within a cylinder head of an engine, a rotational transmitting member mounted around the peripheral surface of the cam shaft so as to rotate relatively thereto within a predetermined range for transmitting rotational power from a crank pulley. A plurality of vanes are provided on the cam shaft or the rotational transmitting member. Fluid chambers are formed between the cam shaft and the rotational transmitting member and separated into advancing chambers and delaying chambers by the vanes. A fluid supplying device supplies fluid under pressure to at least a selected one of the advancing chambers and the delaying chambers. A coil-spring is disposed between the cam shaft and the rotational transmitting member so as to expand one of the advancing chambers and the delaying chambers. A restricting device is used to restrict the radial movement of the coil-spring.

REFERENCES:
patent: 5558053 (1996-09-01), Tortul
patent: 5775279 (1998-07-01), Ogawa et al.
patent: 5870983 (1999-02-01), Sato et al.

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