Fuel pump control system for internal combustion engine

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

1994-04-06

1995-10-10

Miller, Carl S.

Internal-combustion engines

Charge forming device

With fuel pump

123 1A, F02M 3704

Patent

active

054562341

ABSTRACT:
A system for controlling an electric fuel pump housing a DC motor therein for an internal combustion engine using a gasoline-alcohol blend fuel. A switchover line is preestablished with respect to alcohol concentration in the fuel and operating condition of the engine such as an engine load, an engine speed or both the engine load and engine speed. If the detected condition exceeds the switchover line in a high engine load, a relay is energized so that battery voltage is supplied to the motor through a line bypassing a resistor provided at an initial power supply line. Voltage and hence current applied to the motor is thus increased to raise pump speed higher. Although the system construction is simple and low-cost, sufficient fuel can be supplied at the high engine load.

REFERENCES:
patent: 4284053 (1981-08-01), Merrick
patent: 4359984 (1982-11-01), Nakao
patent: 4430980 (1984-02-01), Pidgeon
patent: 4577604 (1986-03-01), Hara
patent: 4791905 (1988-12-01), Furuta
patent: 4827897 (1989-05-01), Yamada
patent: 4919102 (1990-04-01), Iwabuchi
patent: 4993391 (1991-02-01), Kuribara
patent: 5044344 (1991-09-01), Tuckey

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