Fuel supply device and method of assembling same

Details Fuel supply device and method of assembling same Fuel supply device and method of assembling same

1991-09-05

1994-10-18

Bertsch, Richard A.

Pumps

Motor driven

Including means utilizing pump fluid for augmenting cooling,...

4174237, F04B 1700

Patent

active

053562720

ABSTRACT:
A fuel pump for a vehicle includes a brushless motor for operating this fuel pump, and a control circuit for the brushless motor is contained in the fuel pump. Difficulties such as a cutting of the wiring due to an electrolytic corrosion of electrically-conductive portions, and a short-circuiting thereof, are prevented. A pump portion, a motor portion and a discharge portion are provided in a housing of the fuel pump. The motor portion includes a rotor and a stator portion. The stator portion is molded by a resin material into a cylindrical shape with a closed bottom. The stator portion supports a shaft of the rotor. Stator coils are molded in a peripheral wall portion of the stator portion, and a container containing the control circuit is molded in the bottom wall portion of the stator portion. The stator coils, copper wires extending therefrom, and terminals from the control circuit are completely molded in the above resin material. With this arrangement, the stator coils, the control circuit, and the electrically-conductive portions extending between the control circuit and the stator coils are not exposed to the fuel at all, and therefore the above difficulties are prevented.

REFERENCES:
patent: 2993449 (1961-07-01), Harland
patent: 3365122 (1968-01-01), Hajec et al.
patent: 3685926 (1972-08-01), Blum
patent: 4566866 (1986-01-01), Kemmner
patent: 4726746 (1988-02-01), Takada et al.
patent: 4998865 (1991-03-01), Nakanishi et al.

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