Control apparatus for a vehicle engine electric fuel pump

Details Control apparatus for a vehicle engine electric fuel pump Control apparatus for a vehicle engine electric fuel pump

1986-03-31

1988-12-20

Miller, Cart Stuart

Internal-combustion engines

Charge forming device

With fuel pump

123494, F02M 3900

Patent

active

047919051

ABSTRACT:
In a dc electric fuel pump control apparatus for controlling the quantity of fuel supplied to a vehicle engine in accordance with an engine operating parameter condition such as an intake air flow condition or engine speed condition, when controlling a voltage applied to a fuel pump operating motor by closing or opening a fixed-resistor short-circuiting switch circuit in accordance with the magnitude of the operating parameter relative to a predetermined value, an increase or decrease of a battery power source voltage from a predetermined value is detected to increase or decrease the predetermined value of the engine operating parameter. Where a variable resistor is used in place of the fixed resistor, its resistance value in a low battery power source voltage condition is controlled lower than that in a high battery power source voltage condition.

REFERENCES:
patent: 3742256 (1973-06-01), Frederiksen
patent: 3817225 (1974-06-01), Priegel
patent: 4260373 (1981-04-01), Schillinger
patent: 4355620 (1982-10-01), Seilly
patent: 4359984 (1982-11-01), Nakao

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