Valve timing control device

Details Valve timing control device Valve timing control device

1996-12-02

1999-08-17

Lo, Weilun

Internal-combustion engines

Poppet valve operating mechanism

With means for varying timing

123 9031, F01L 1344

Patent

active

059378107

ABSTRACT:
A valve timing control device includes a rotor fixed on a cam shaft, a housing member rotatably mounted on the cam shaft so as to surround the rotor, a chamber defined between the housing member and the rotor and having a pair of circumferentially opposed walls, a vane mounted on the rotor and extended outwardly therefrom in the radial direction into the chambers so as to divide each of chambers into a first pressure chamber and a second pressure chamber, a fluid supplying device for supplying fluid under pressure to at least a selected one of the first pressure chamber and the second pressure chamber, and a concave portion formed on the radially outer ends of the opposed walls of the chamber.

REFERENCES:
patent: 4858572 (1989-08-01), Shirai et al.
patent: 5507254 (1996-04-01), Melchoir
patent: 5520145 (1996-05-01), Nagai et al.

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