Air/fuel control method with adaptive feedback actuation

Details Air/fuel control method with adaptive feedback actuation Air/fuel control method with adaptive feedback actuation

1994-02-25

1995-04-25

Nelli, Raymond A.

Internal-combustion engines

Charge forming device

Including exhaust gas condition responsive means

F02D 4114

Patent

active

054089808

ABSTRACT:
An engine air/fuel control system includes an apparatus and method for adaptively setting an initialization period preceding closed loop fuel control. During the initialization period, fuel delivered to the engine is modulated by a periodic waveform. A high voltage signal associated with the high output state of an exhaust gas oxygen sensor and a low voltage signal associated with the low voltage state of the exhaust gas oxygen sensor are sampled. When the difference between these signals exceeds a preselected value, the initialization period is terminated and closed loop fuel control is actuated.

REFERENCES:
patent: 3973529 (1976-08-01), Wessel et al.
patent: 4109615 (1978-08-01), Asano
patent: 4120269 (1978-10-01), Fujishiro
patent: 4132200 (1979-01-01), Asano et al.
patent: 4170965 (1979-10-01), Aono
patent: 4187806 (1980-02-01), Schnurle et al.
patent: 5363646 (1994-11-01), Orzel et al.
patent: 5363830 (1994-11-01), Morikawa
Regelung der Gemischzusammensetzung bei Einspritz-ottomotoren mit Hilfe der Lambda-Sonde, Bosch Techn. Berichte 6 (1978).

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