Fuel pump control device for internal combustion engine

Details Fuel pump control device for internal combustion engine Fuel pump control device for internal combustion engine

1995-05-24

1996-09-17

Miller, Carl S.

Internal-combustion engines

Charge forming device

With fuel pump

123198D, F02M 3704

Patent

active

055558720

ABSTRACT:
In a pump control circuit, if a battery voltage declines to a voltage level lower than that required to insure a constant voltage, a low-voltage detection circuit outputs a low voltage detection signal. In the case of the decline in the battery voltage, an NOR circuit outputs the conversion signal from an internal logic section, and a pump control signal bypassing the internal logic section, giving priority to the latter signal. A motor drive circuit turns FET ON and OFF in accordance with the output signal of the NOR circuit. According to ON/OFF of the FET, the intermittent control of the current from the battery to the pump drive motor is performed.

REFERENCES:
patent: 4359984 (1982-11-01), Nakao
patent: 4430980 (1984-02-01), Pidgeon
patent: 4791905 (1988-12-01), Furuta
patent: 4919102 (1990-04-01), Iwabuchi
patent: 5092302 (1992-03-01), Mohan
patent: 5293299 (1994-03-01), Iwabuchi
patent: 5313923 (1994-05-01), Takeuchi et al.
patent: 5379741 (1995-01-01), Matysiewicz

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