Pumps – Motor driven – Including means utilizing pump fluid for augmenting cooling,...
Patent
1990-12-17
1992-06-09
Casaregola, Louis J.
Pumps
Motor driven
Including means utilizing pump fluid for augmenting cooling,...
417 45, F04B 4906
Patent
active
051202018
ABSTRACT:
A self-contained brushless electric-motor fuel pump for internal combustion engine fuel delivery systems and like applications in accordance with the present invention comprises a housing having a fuel inlet and fuel outlet, and a brushless electric motor with a permanent magnet armature mounted for rotation within the housing and stator windings surrounding the armature within the housing. A pump mechanism is positioned between the fuel inlet and outlet, and is coupled to the armature for corotation with the armature within the housing to pump fuel under pressure from the inlet to the outlet. A pressure sensor is operatively coupled to the fuel outlet within the housing for providing an electrical pressure signal as a function of fuel pressure at the outlet. Pump motor control electronics within the housing includes circuitry for comparing the pressure signal from the pressure sensor to a pump drive reference signal, and providing an error signal as a function of a difference therebetween. Drive current is applied to the stator windings of the motor as a function of such error signal.
REFERENCES:
patent: 3985467 (1976-10-01), Lefferson
patent: 4260333 (1981-04-01), Schillinger
patent: 4352636 (1982-10-01), Patterson
patent: 4431953 (1984-02-01), Schray et al.
patent: 4728264 (1988-03-01), Tuckey
patent: 4789308 (1988-12-01), Tuckey
patent: 4830576 (1989-05-01), Patrick
patent: 4998865 (1991-01-01), Nakanishi
Thompson James L.
Tuckey Charles H.
Casaregola Louis J.
Scheuermann David W.
Walbro Corporation
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