Internal-combustion engines – Poppet valve operating mechanism – With means for varying timing
Patent
1998-09-28
2000-03-21
Lo, Weilun
Internal-combustion engines
Poppet valve operating mechanism
With means for varying timing
123 9031, F01L 1344
Patent
active
060390158
ABSTRACT:
A valve timing control device comprising a cam shaft rotatably assembled within an engine; a rotational transmitting member mounted around the peripheral surface of the cam shaft so as to rotate relative thereto within a predetermined range for transmitting a rotational power from a crank pulley; vanes provided on the cam shaft or the rotational transmitting member; fluid chambers formed between the cam shaft and the rotational transmitting member and separated into advancing chambers and delaying chambers by the vanes; a first fluid passage for feeding and discharging a fluid to and from the advancing chambers; a second fluid passage for feeding and discharging a fluid to and from the delaying chambers; a retracting bore formed in the rotational transmitting member and accommodating a locking pin and a spring to act on the locking pin; a plate supporting one end of the spring, the plate engaging with a groove which penetrates in the radial direction of the retracting bore; a receiving bore formed on the cam shaft; and a third fluid passage for feeding to the receiving bore.
REFERENCES:
patent: 4858572 (1989-08-01), Shirai et al.
patent: 5775279 (1998-07-01), Ogawa et al.
patent: 5813378 (1998-09-01), Sato
Aisin Seiki Kabushiki Kaisha
Lo Weilun
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