Air/fuel ratio control system for an internal combustion engine

Details Air/fuel ratio control system for an internal combustion engine Air/fuel ratio control system for an internal combustion engine

1990-06-27

1992-01-07

Cross, E. Rollins

Power plants

Internal combustion engine with treatment or handling of...

Having means analyzing composition of exhaust gas

60285, 123489, F02D 4114

Patent

active

050779710

ABSTRACT:
An air/fuel ratio control system is provided for use with an internal combustion engine. The system includes an air/fuel ratio detector arranged on an upstream side of a catalytic converter so as to detect the air/fuel ratio of the internal combustion engine from components of exhaust gas, a device for controlling the air/fuel ratio of the internal combustion engine on the basis of results of a comparison between a detection value from the air/fuel ratio detector and a predetermined reference value; and a device for shifting the reference value to a lean air/fuel ratio side in a specific operation state of the internal combustion engine.

REFERENCES:
patent: 4156413 (1979-05-01), Taplin
patent: 4809501 (1989-03-01), Kayanuma et al.
patent: 4926828 (1990-05-01), Fujimoto et al.

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