Air-to-fuel ratio correcting arrangement in a fuel supply contro

Details Air-to-fuel ratio correcting arrangement in a fuel supply contro Air-to-fuel ratio correcting arrangement in a fuel supply contro

1978-09-07

1984-10-30

Lall, P. S.

Internal-combustion engines

Charge forming device

Fuel injection system

123492, 123493, 123440, F02B 3300

Patent

active

044794649

ABSTRACT:
The air-to-fuel ratio of a combustible mixture supplied to an engine is controlled by a feedback loop which includes an integration circuit for integrating the output signal of an oxygen sensor which detects the oxygen concentration in the exhaust gases of the engine, to produce an output voltage. The output of the sensor is applied to the integration circuit through a switch which opens in response to predetermined conditions of the engine whereby the output voltage of the integration circuit is held at a value occurring just before the switch opens.

REFERENCES:
patent: 3727591 (1973-04-01), Suda
patent: 3742920 (1973-07-01), Black
patent: 3875907 (1975-04-01), Wessel et al.
patent: 3895611 (1975-07-01), Endo et al.
patent: 3903853 (1975-09-01), Kizler et al.
patent: 3986352 (1976-10-01), Casey
patent: 3990411 (1976-11-01), Oberstadt et al.
patent: 3998189 (1976-12-01), Aoki
"Closed Loop Carburetor Emission Control System", by R. A. Spilski and W. D. Creps, SAE, pp. 145-154, 1975.

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