Air-fuel ratio feedback control system having single air-fuel ra

Details Air-fuel ratio feedback control system having single air-fuel ra Air-fuel ratio feedback control system having single air-fuel ra

1990-03-01

1992-12-15

Lall, Parshotam S.

Boots, shoes, and leggings

60276, 60285, 123674, F01N 300, F02M 5100

Patent

active

051723204

ABSTRACT:
In an air-fuel ratio feedback system including a single air-fuel ratio sensor downstream of or within a three-way catalyst converter, a coarse-adjusting term AF.sub.c is calculated integrally in accordance with the output of the air-fuel ratio sensor, and an O.sub.2 storage term AF.sub.CCRO is calculated in accordance with an O.sub.2 storage amount of the three-way catalyst converter.

REFERENCES:
patent: 4817384 (1989-04-01), Okumura et al.
patent: 4840027 (1989-06-01), Okumura
patent: 4941318 (1990-07-01), Matsuoka

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