Abstract: A system for delivering fuel to an internal combustion engine wherein excess fuel from a fuel pump is diverted by a pressure regulator to supply low pressure fuel to power a jet pump. The low pressure created by the jet pump entrains fuel from the fuel tank and the combined flow is directed into a reservoir for inlet to the fuel pump.

Abstract: A fuel delivery system for a fuel injected automotive internal combustion engine has a fuel pump mounted within a fuel tank for pumping fuel through a fuel line to an engine mounted fuel rail which delivers fuel to a plurality of fuel injectors. Attached on the output side of the fuel pump in the fuel line is a pressure valve for controlling fuel flow from the pump to the rail and from the rail to the pump. The pressure valve has a housing for containing a check valve, which opens upon the fuel pump delivering a predetermined pressure to the fuel line, and a pressure relief valve, which opens to allow fuel flow from the fuel line to the output side of the fuel pump when the fuel line is overpressurized. The relief valve has a predetermined set point greater than that of the check valve is mounted in parallel therewith so that pressure in the fuel line is maintained at an appropriate level during long deceleration periods, as well as when the engine is off.