Air-fuel ratio control system for internal combustion engines

Details Air-fuel ratio control system for internal combustion engines Air-fuel ratio control system for internal combustion engines

1996-04-26

1998-03-10

Wolfe, Willis R.

Power plants

Internal combustion engine with treatment or handling of...

Having means analyzing composition of exhaust gas

60277, 60278, 60285, F01N 328

Patent

active

057248087

ABSTRACT:
An air-fuel ratio control system for an internal combustion engine controls the air-fuel ratio of a mixture supplied to the engine in response to an output from a first air-fuel ratio sensor arranged in an exhaust passage at a location upstream of a catalyst for purifying exhaust gases emitted from the engine. A control parameter for use in controlling an operation of the engine is changed when deterioration of the catalyst caused by sulfur poisoning is detected to desulfurize the catalyst.

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patent: 5487269 (1996-01-01), Atanasyan et al.
patent: 5528898 (1996-06-01), Nakayama et al.
patent: 5577382 (1996-11-01), Kihara et al.
patent: 5647204 (1997-07-01), Atanasyan

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