Valve timing control apparatus for internal combustion engine

Details Valve timing control apparatus for internal combustion engine Valve timing control apparatus for internal combustion engine

2006-06-13

2006-06-13

Denion, Thomas (Department: 3748)

Internal-combustion engines

Poppet valve operating mechanism

With means for varying timing

C123S090120, C123S090150, C123S090310, C464S002000, C464S160000, C092S00500L

Reexamination Certificate

active

07059286

ABSTRACT:
In a valve timing control apparatus, hydraulic oil is supplied into retarding and advancing chambers, and first and second hydraulic chambers, when hydraulic pressure is less than a predetermined pressure and when a phase difference between a most advancing target phase and actual phase of a driver-side rotating member relative to a driven-side rotating member is small. Hydraulic pressure is applied from the first and second hydraulic chambers to the stopper pin, so that the stopper piston is restricted from protruding to the engaging ring before the actual phase coincides with the most advancing target phase. Hydraulic oil is drained from the retarding chamber and the first hydraulic chamber, and hydraulic pressure in the second hydraulic chamber is small, so that the stopper pin protrudes and engages with an engaging ring at the most advancing target phase.

REFERENCES:
patent: 6330869 (2001-12-01), Yoshiki et al.
patent: 6450139 (2002-09-01), Watanabe
patent: 6505586 (2003-01-01), Sato et al.
patent: 6739298 (2004-05-01), Kusano et al.
patent: 9-217610 (1997-08-01), None

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