Power-managed fuel delivery system

Details Power-managed fuel delivery system Power-managed fuel delivery system

1995-07-12

1997-09-30

Thorpe, Timothy

Pumps

Condition responsive control of pump drive motor

By control of electric or magnetic drive motor

123497, F04B 4906

Patent

active

056720513

ABSTRACT:
A fuel delivery system for an internal combustion engine that includes an electric-motor fuel pump and an electronic control circuit for applying electrical power to the pump motor from a source of d.c. potential. The electronic control circuit is responsive to voltage level at the source of d.c. potential for automatically boosting electrical power applied to the pump motor when voltage available at the source decreases to a preselected level. In the preferred embodiments, the pump motor is a d.c. motor, and the electronic control circuit takes the form of a d.c.-to-d.c. convertor having a transformer and a rectifier circuit coupling the transformer to the motor. Power switches apply alternating current to the transformer when voltage available at the d.c. power source is inadequate, thereby increasing or boosting power applied to the motor through the rectifier circuit.

REFERENCES:
patent: 4399200 (1983-08-01), Galloway
patent: 4523563 (1985-06-01), Moore et al.
patent: 4577604 (1986-03-01), Hara et al.
patent: 4628235 (1986-12-01), Goings
patent: 4782271 (1988-11-01), Trowbridge
patent: 4791905 (1988-12-01), Furuta et al.
patent: 5092302 (1992-03-01), Mohan
patent: 5216994 (1993-06-01), Aoki et al.

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