Valve timing control device

Details Valve timing control device Valve timing control device

1998-06-05

2000-03-14

Lo, Weilun

Internal-combustion engines

Poppet valve operating mechanism

With means for varying timing

123 9031, F01L 1344, F01L 1300

Patent

active

060358165

ABSTRACT:
A valve timing control device for controlling the opening/closing timing of the intake valve or exhaust valve of an internal combustion engine is disclosed, comprising a valve opening/closing rotary shaft rotatably assembled with the cylinder head of the internal combustion engine; a rotation transmitting member mounted around the rotary shaft so as to rotate relative thereto within a predetermined range for transmitting a rotating power from a crank shaft; vanes provided on the rotary shaft or the rotation transmitting member; a fluid chamber formed between the rotary shaft and the rotation transmitting member and halved into advancing chambers and delaying chambers by the vanes; first fluid passages for feeding and discharging a fluid to and from the advancing chambers; second fluid passages for feeding and discharging the fluid to and from the delaying chambers; a refuge hole formed in the rotation transmitting member or the rotary shaft and accommodating therein a lock pin spring-biased toward the rotary shaft or the rotation transmitting member; a fitting hole formed in the rotary shaft or the rotation transmitting member for fitting therein the head portion of the lock pin when the rotary shaft and the rotation transmitting member are synchronized in predetermined relative phases; and a third passage for feeding and discharging the fluid to and from the fitting hole, wherein the first fluid passage or the second fluid passage is made to communicate with the refuge hole so that the first fluid passage or the second fluid passage and the third fluid passage can communicate through the refuge hole in the state where the lock pin comes out of the fitting hole and into the refuge hole.

REFERENCES:
patent: 5666914 (1997-09-01), Ushida et al.
patent: 5724929 (1998-03-01), Mikame et al.
patent: 5738056 (1998-04-01), Mikame et al.
patent: 5775279 (1998-07-01), Ogawa et al.
patent: 5794577 (1998-08-01), Kira
patent: 5797361 (1998-08-01), Mikame et al.

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