Valve timing device

Details Valve timing device Valve timing device

1999-03-31

2000-05-09

Lo, Weilun

Internal-combustion engines

Poppet valve operating mechanism

With means for varying timing

123 9031, F01L 1344, F01L 1300

Patent

active

060588977

ABSTRACT:
A valve timing control device comprises: a rotary shaft rotatably assembled within a cylinder head of an internal combustion engine; a rotational transmitting member mounted around the peripheral surface of the rotary shaft so as to rotate relative thereto within a predetermined range for transmitting a rotational power from a crank shaft; a vane provided on either one of the rotary shaft and the rotational transmitting member; a pressure chamber formed between the rotary shaft and the rotational transmitting member, and divided into an advance chamber and a delay chamber by the vane; a first fluid passage for supplying and discharging a fluid to and from the advance chamber; a second fluid passage for supplying and discharging a fluid to and from the delay chamber; a locking mechanism for holding the vane in the middle position of the pressure chamber, when the internal combustion engine starts; and a control mechanism for restricting the rotational transmitting member to rotate around the rotary shaft, when the vane is the middle position and a pressure of either one of the advancing chamber and the delaying chamber is less than a predetermined pressure.

REFERENCES:
patent: 5738056 (1998-04-01), Mikame et al.
patent: 5823152 (1998-10-01), Ushida
patent: 5845615 (1998-12-01), Nakamura et al.
patent: 5901674 (1999-05-01), Fujiwaki
patent: 5924395 (1999-07-01), Moriya et al.

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