Valve control apparatus and method

Details Valve control apparatus and method Valve control apparatus and method

1992-06-29

1993-06-01

Nelli, Raymond A.

Internal-combustion engines

Engine speed regulator

Responsive to deceleration mode

F02D 3902

Patent

active

052150542

ABSTRACT:
A valve control apparatus particularly suited for a diesel engine brake. There is an hydraulic actuator having a piston which contacts the valve stem of an exhaust valve. The actuator is independent of the exhaust valve opening mechanism. There is a device, such as an electromagnetically activated valve, which can releasably shut off a flow of fluid from the hydraulic actuator after the exhaust valve is opened by the exhaust valve opening mechanism. The exhaust valve is prevented from closing until a flow of fluid from the hydraulic cylinder is permitted just before top dead center of the compression stroke.

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