Electric fuel pump
AssigneePierburg GmbH
InventorsWolfgang Zacher, Ronald Rathke
Life of this patent
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Abstract
An electric fuel pump for an internal combustion engine in which a pump mechanism is provided in a housing for pumping fuel from an inlet to an outlet of the housing. A d.c. motor in the housing is drivingly connected to the pump mechanism, the fuel flowing through the housing past the motor to the outlet. A module including a commutation circuit for the d.c. motor is sealed in the housing from the fuel which flows therearound and cools the module. The module is constructed with an injection-molded casing around the circuit which is connected to stator windings of the motor and to an outside power supply.
Claims12
An electric fuel pump for an internal combustion engine comprising a housing, a pump mechanism in said housing for pumping fuel from an inlet to an outlet of said housing, a d.c. motor in said housing drivingly connected to said pump mechanism, the fuel flowing through said housing past the motor to said outlet, a module including a commutation circuit for said d.c. motor, said module being connected to stator windings of said motor and sealed in said housing from the fuel flowing therethrough, said module comprising an injection-molded plastic casing having motor connection contact elements and power connecting terminals projecting from said casing, said housing having a compartment through which fuel flows past said casing, said casing having an outer surface exposed to the fuel flowing in said compartment so as to be cooled by the fuel, said outer surface of the casing having cooling elements thereon exposed to the fuel flowing in the housing compartment.
Dependencies are inferred from the claim text.