Air fuel ratio feedback control

Details Air fuel ratio feedback control Air fuel ratio feedback control

1992-11-03

1993-10-26

Cross, E. Rollins

Power plants

Internal combustion engine with treatment or handling of...

Methods

60276, 123674, 123688, 123691, F01N 320

Patent

active

052555127

ABSTRACT:
An air fuel ratio control system for an internal combustion engine having an electronic engine control module and an upstream and a downstream exhaust gas oxygen sensor positioned in the engine exhaust gas stream. A first feedback loop includes the upstream EGO sensor and an air fuel bias table. A second feedback loop includes a downstream EGO sensor and a trim signal to change the stored values in the air fuel bias table.

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