Air-fuel ratio control system

Details Air-fuel ratio control system Air-fuel ratio control system

1984-08-03

1985-12-17

Dolinar, Andrew M.

Internal-combustion engines

Charge forming device

Having fluidic logic control means

F02M 712

Patent

active

045586772

ABSTRACT:
An air-fuel control system for an engine mounted on a vehicle comprises an O.sub.2 sensor, a feedback control system including a proportion and integration control circuit having resistors as proportion and integration constant elements, and switches for changing the resistors. An air-fuel ratio deviation detecting circuit is provided to respond to the output of the O.sub.2 sensor for producing an output signal when the air-fuel ratio greatly deviates from the stoichiometric air-fuel ratio at rapid acceleration or deceleration of the vehicle. The output signal is applied to the switches to operate it so as to increase the proportion and integration constant.

REFERENCES:
patent: 3782347 (1974-01-01), Schmidt et al.
patent: 4029061 (1977-06-01), Asano
patent: 4153022 (1979-05-01), Asano et al.
patent: 4156412 (1979-05-01), Kraus
patent: 4173952 (1979-11-01), Asano
patent: 4290400 (1981-09-01), Pomerantz
patent: 4300505 (1981-11-01), Takada et al.
patent: 4365603 (1982-12-01), Shikata et al.

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