Warming-up system of a car engine

Details Warming-up system of a car engine Warming-up system of a car engine

1985-12-19

1987-02-24

Dolinar, Andrew M.

Internal-combustion engines

Charge forming device

Auxiliary control of carburetor fuel metering

123179G, 123180E, 123180P, F02M 108

Patent

active

046449191

ABSTRACT:
A warming-up system of an engine for an automobile according to the present invention is provided with main and auxiliary nozzles in an air intake passage of a carburetor. The auxiliary nozzle is connected to an electromagnetically-operated fuel resupply pump. The warming-up system is further provided with a position detector for determining whether or not a throttle valve is in an open position, a rotation detector for detecting the rotational frequency of the engine, and a control circuit for controlling the drive of the pump in accordance with signals from the detectors. Based on the rotational frequency of the engine detected by the rotation detector, the control circuit determines whether the engine is in a cranking state or in a complete detonation state. When the engine is in the complete detonation state, the control circuit drives the pump to supply a predetermined quantity of auxiliary fuel to the intake passage through the auxiliary nozzle. When the engine is in the complete detonation state and if the throttle valve is determined to be open, the control circuit drives the pump to supply a larger quantity of auxiliary fuel than that supplied from the pump in the complete detonation state.

REFERENCES:
patent: 3704702 (1972-12-01), Aono
patent: 4184460 (1980-01-01), Harada et al.
patent: 4249496 (1981-02-01), Shimazaki et al.
patent: 4441467 (1984-04-01), Powell
patent: 4480618 (1984-11-01), Kamifuji et al.

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