Abnormality detector for air-fuel ratio control system

Details Abnormality detector for air-fuel ratio control system Abnormality detector for air-fuel ratio control system

1996-11-07

1998-12-08

Argenbright, Tony M.

Power plants

Internal combustion engine with treatment or handling of...

Having means analyzing composition of exhaust gas

60277, 60285, 731181, 123688, F01N 300, F02D 4114

Patent

active

058454896

ABSTRACT:
An inflow quantity of an exhaust gas component flowing into a catalyst is calculated based upon air fuel ratio detected by an upstream air fuel ratio sensor which is provided on the upstream side of the catalyst. In addition, an outflow quantity of an exhaust gas component flowing out of the catalyst is calculated based upon air fuel ratio detected by a downstream air fuel ratio sensor which is provided on the downstream side of the catalyst. The quantity of an exhaust gas component absorbed by the catalyst can be detected in real time based upon a difference between the inflow quantity and outflow quantity. Thus, a state of the catalyst can be precisely detected in real time.

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