Abstract: In a diesel engine fuel injection system, a fuel injection pump draws fuel from a reservoir, delivers a portion of the fuel to the engine, and directs excess fuel through a return line back to the reservoir. A supply pump delivers fuel from a tank to the reservoir to maintain a constant volume of fuel in the reservoir. A fuel metering unit measures the rate of fuel delivery by the supply pump. An additive pump feeds an additive through the return line to the reservoir where the additive mixes with the fuel. The fuel metering unit controls the additive pump to proportion the rate at which additive is fed to the reservoir to the rate at which fuel is delivered by the supply pump, and the amount of additive delivered to the engine is thereby proportioned to the amount of fuel consumed by the engine.

Abstract: 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.