Air/fuel ratio feedback control system for internal combustion e

Details Air/fuel ratio feedback control system for internal combustion e Air/fuel ratio feedback control system for internal combustion e

1981-07-27

1983-03-08

Lall, P. S.

Internal-combustion engines

Charge forming device

Having fluidic logic control means

123489, F02B 3300

Patent

active

043757979

ABSTRACT:
An air/fuel ratio control system which is adapted to perform feedback control of the air/fuel ratio of a mixture being supplied to an internal combustion engine, selectively by porportional term control or by integral term control in response to changes in the output of an O.sub.2 sensor. Immediately after changeover from open loop control to closed loop control, the position of an actuator for driving an air/fuel ratio control valve is controlled initially with integral term correction for feedback control of the air/fuel ratio, to thereby keep small the deviation of the actuator position from its proper position immediately after the changeover to the closed loop control.

REFERENCES:
patent: 3782347 (1974-01-01), Schmidt et al.
patent: 4153023 (1979-05-01), Asano et al.
patent: 4231333 (1980-11-01), Thatcher et al.
patent: 4303049 (1981-12-01), Ikeura et al.
patent: 4306523 (1981-12-01), Takeda

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