Variable valve lift device

Details Variable valve lift device Variable valve lift device

1998-09-11

2000-10-03

Lo, Weilun

Internal-combustion engines

Poppet valve operating mechanism

With means for varying timing

123 9048, F01L 1300, F01L 114

Patent

active

061258040

ABSTRACT:
A variable valve lift device (20) provided in a bore (21) of a cylinder head (11) to open and close a valve (24) in accordance with a rotation of a cam (13, 14, 15) comprises an outer body (22) driven by the cam (13, 14, 15) and slidably provided in the bore (21); an inner body (23) connected to the valve (24) and slidably provided in the outer body (22); a restricting member (26) for restricting mutual displacement between the outer body (22) and the inner body (23); and a synchronizing member (36) slidably provided in the inner body (23) and for controlling the restricting member (26) based on inertia applied thereto. In the present invention, the restricting member (26) is controlled by the synchronizing member (36). The synchronizing member (36) detects the acceleration of the inner body (23) so that the restricting member (26) may restrict the mutual displacement between the outer body (22) and the inner body (23) in timely manner.

REFERENCES:
patent: 5488934 (1996-02-01), Shirai et al.
patent: 5558052 (1996-09-01), Schwarzenthal et al.
patent: 5603293 (1997-02-01), Schwarzenthal et al.
patent: 5603294 (1997-02-01), Kawai
patent: 5615651 (1997-04-01), Miyachi
patent: 5782216 (1998-07-01), Haas et al.

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