Engine valve driving apparatus

Details Engine valve driving apparatus Engine valve driving apparatus

1987-08-07

1989-01-03

Wolfe, Willis R.

Internal-combustion engines

Poppet valve operating mechanism

With means for varying timing

123198F, 123 9055, F01L 108, F01L 124, F01L 134

Patent

active

047948930

ABSTRACT:
Engine valve driving apparatus including a camshaft rotatable with a crankshaft of the engine with a movable cam member supported in sliding fit by the camshaft for axial movement but prevented from any rotation relative to the camshaft. An engine valve is driven by the movable cam member, and a hydraulic system axially shifts the movable cam member between an operative position where the movable cam member is brought into cooperation with the engine valve and an inoperative position where the movable cam member is completely out of cooperation with the engine valve. The hydraulic system causes the shifting movement of the movable cam member according to engine operating conditions so that the engine valve is driven at different speeds or different timings.

REFERENCES:
patent: 4388897 (1983-06-01), Rosa
patent: 4401069 (1983-08-01), Foley
patent: 4494506 (1985-01-01), Hayama et al.
patent: 4498352 (1985-02-01), Hedelin
patent: 4522085 (1985-06-01), Kane

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