Electric fuel pump

摘要

An electric fuel pump comprising a pump casing assembly having a fuel inlet port and an outlet port and a rotary member driven by an electric motor disposed within the pump casing assembly for pumping fuel from the outlet port. A fuel discharge port supplies the fuel from the outlet port to an engine, and a pressure regulator is disposed for regulating the pressure of the fuel to be discharged from the fuel discharge port. The pressure regulator regulates the pressure of the fuel from the outlet port by returning the fuel to the vicinity of the inlet port when the pressure of the fuel from the outlet port is equal to or higher than a predetermined pressure.