Air-fuel ratio control apparatus of an internal combustion engin

Details Air-fuel ratio control apparatus of an internal combustion engin Air-fuel ratio control apparatus of an internal combustion engin

1981-12-02

1983-11-08

Myhre, Charles J.

Power plants

Internal combustion engine with treatment or handling of...

Having means analyzing composition of exhaust gas

123440, 123589, F01N 308

Patent

active

044134711

ABSTRACT:
An air-fuel ratio control apparatus includes a specific integration means for integrating the rich or lean signal determined depending upon the detected concentration of the predetermined exhaust gas component, to produce an integration signal which is increased when the rich signal is applied and decreased only when the lean signal, having a duration longer than a predetermined period, is applied. If the short lean signal, having a duration shorter than or equal to the predetermined period, is produced, the above integration signal is utilized for adjusting the air-fuel ratio condition.

REFERENCES:
patent: 3782347 (1974-01-01), Schmidt et al.
patent: 3990411 (1976-11-01), Oberstadt et al.
patent: 4163433 (1979-08-01), Fujishiro
patent: 4248196 (1981-02-01), Toelle
patent: 4375746 (1983-03-01), Hattori

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