Air-fuel ratio feedback control system having air-fuel ratio sen

Details Air-fuel ratio feedback control system having air-fuel ratio sen Air-fuel ratio feedback control system having air-fuel ratio sen

1991-06-20

1992-03-03

Lazarus, Ira S.

Power plants

Internal combustion engine with treatment or handling of...

Methods

60276, 60285, 123489, F02D 4114

Patent

active

050921231

ABSTRACT:
In an air-fuel ratio feedback control system including air-fuel ratio sensors upstream and downstream of a three-way catalyst converter, the cold-condition compensating term is calculated in accordance with the upstream air-fuel ratio sensor disposed upstream of the catalyst converter, and the O.sub.2 storage term is calculated in accordance with the downstream air-fuel ratio sensor disposed downstream thereof.

REFERENCES:
patent: 4905469 (1990-03-01), Matsuoka
patent: 5052177 (1991-10-01), Nada
patent: 5070692 (1991-12-01), Nada
patent: 5070693 (1991-12-01), Nada

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