Kraftstoffzuführeinrichtung für eine Brennkraftmaschine

摘要

A fuel delivery system that includes a fuel pump having an inlet for drawing fuel from a fuel supply and an outlet connected to a fuel filter so that fuel delivered to the engine by the pump flows through the filter. A check valve is positioned between the filter outlet and the fuel line to the engine so as to prevent reverse flow of fuel from the engine to the supply when the pump is shut down. A pressure reference inlet connected to the outlet side of the fuel filter on the downsream side of the check valve. The outlet of the pressure regulator is connected to return fuel to the fuel supply bypassing the filter as a function of fuel pressure at the filter so as to maintain substantially constant fuel pressure delivery to the engine. The reference input to the pressure regulator is connected to the engine fuel line. Any fuel pressure increase at the engine and in the fuel line due to heat or the like automatically opens the regulator so as to vent the pump outlet to the supply.