Valve system for automobile engine

Details Valve system for automobile engine Valve system for automobile engine

1991-07-03

1992-03-31

Cross, E. Rollins

Internal-combustion engines

Poppet valve operating mechanism

With means for varying timing

123 9041, 123198F, F01L 134, F01L 118

Patent

active

050998064

ABSTRACT:
A valve system for an automobile engine opens and closes intake and exhaust valves by reciprocative force of a crankshaft. Specifically, the valve system controls timing for operating and stopping these valves, and the amount of cam lift. The valve system comprises a camshaft, a rocker shaft in parallel to the camshaft, a main rocker arm mounted on the rocker shaft, a sub-rocker arm pivotally supported on the rocker shaft, engaging means for engaging and disengaging the rocker shaft with and from the sub-rocker arm, and driving means for driving the engaging means. The engaging means includes an opening on a rotating surface of the sub-rocker arm, a plunger located in the rocker shaft and an oil chamber located at an upper or lower end of the plunger. The driving means includes an oil gallery in the rocker shaft and an oil pressuring member.

REFERENCES:
patent: 4724802 (1988-02-01), Ishii
patent: 4768475 (1988-09-01), Ikemura
patent: 4844023 (1989-07-01), Konno et al.
patent: 4848285 (1989-07-01), Konno
patent: 4883027 (1989-11-01), Oikawa et al.

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