Diesel engine shutdown control system

摘要

A diesel engine fuel supply and control system for an engine having a fuel supply pump which has its direction of rotation in accord with the direction of engine rotation is provided with engine shutdown, anti-bump start and reverse rotation arresting means including, in a preferred embodiment, a pressure responsive piston that acts against a run-stop control lever to cut off fuel supply to the engine cylinders and a selector valve that selectively exposes the piston to pressures on either side of the engine fuel pump. When the valve is set to provide the normal pump inlet pressure to the piston, the engine may operate in the forward rotation direction but is stopped if reverse rotation occurs. If changed to expose the piston to normal pump outlet pressure, the engine is stopped or prevented from operating in the forward rotation direction. A check valve is preferably provided to prevent loss of pressure acting on the piston to the pump outlet so that maximum pressure is maintained to assure a full normal stop and provide subsequent protection against bump starting of the engine in a vehicle.