Variable valve timing control device

Details Variable valve timing control device Variable valve timing control device

2005-07-26

2005-07-26

Denion, Thomas (Department: 3748)

Internal-combustion engines

Poppet valve operating mechanism

With means for varying timing

C123S090180, C123S090160, C123S090150, C123S090310, C418S046000, C418S111000, C418S178000, C418S235000, C464S002000, C464S160000, C092S122000, C092S125000

Reexamination Certificate

active

06920853

ABSTRACT:
A variable valve timing control device includes a rotation member for opening or closing a valve, a rotation transmission member engaged with the rotation member to be relatively rotatable, a vane provided on either one of the rotation member or the rotation transmission member, a hydraulic chamber formed between the rotation member and the rotation transmission member and including an advance angle chamber and a retarded angle chamber, the advance angle chamber and the retarded angle chamber being formed by dividing the hydraulic chamber by the vane, a first hydraulic passage for supplying and discharging a fluid to the advance angle chamber, and a second hydraulic passage for supplying and discharging the fluid to the retarded angle chamber. The vane includes a surface hardness determined to be higher than a surface hardness of a sliding surface of the rotation member or the rotation transmission member for sliding the vane.

REFERENCES:
patent: 5937810 (1999-08-01), Sato et al.
patent: 5947067 (1999-09-01), Kawaharaguchi et al.
patent: 6413061 (2002-07-01), Esumi et al.
patent: 1-092504 (1989-04-01), None
patent: 1999-81928 (1999-03-01), None
patent: 11182475 (1999-07-01), None

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