Automatic engine fuel enrichment and ignition advance angle cont

Details Automatic engine fuel enrichment and ignition advance angle cont Automatic engine fuel enrichment and ignition advance angle cont

1989-07-26

1991-10-01

Dolinar, Andrew M.

Internal-combustion engines

Charge forming device

Fuel injection system

123424, 123179G, 123180E, 123180T, F02D 4106, F02D 4300, F02P 515

Patent

active

050523597

ABSTRACT:
An automatic fuel enrichment system for cranking and warm-up of an internal combustion engine in which a solenoid valve is responsive to control electronics for selectively feeding enrichment fuel to the engine air intake manifold. The valve control electronics receives a signal from the engine ignition system and controls a solenoid valve as a function of engine speed. Specifically, the control electronics energizes the solenoid valve when engine speed exceeds a preset minimum cranking threshold until the engine reaches a preset idle speed threshold, at which point enrichment is terminated. In the event that the engine begins to stall during warm-up and engine speed declines to a preset intermediate threshold, the enrichment valve is again energized until the engine reaches idle speed.

REFERENCES:
patent: 4184460 (1980-01-01), Harada et al.
patent: 4259934 (1981-04-01), Leussink et al.
patent: 4326486 (1982-04-01), Mezger et al.
patent: 4432325 (1984-02-01), Auracher et al.
patent: 4480618 (1984-11-01), Kamifuji et al.
patent: 4489691 (1984-12-01), Ono et al.
patent: 4528963 (1985-07-01), Bessho et al.
patent: 4644919 (1987-02-01), Inoguchi et al.

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