Deterioration diagnosis system for an air-fuel ratio sensor

Details Deterioration diagnosis system for an air-fuel ratio sensor Deterioration diagnosis system for an air-fuel ratio sensor

2007-10-10

2010-11-23

McCall, Eric S (Department: 2855)

Measuring and testing

Internal combustion engine or related engine system or...

Exhaust system

C073S023320

Reexamination Certificate

active

07836758

ABSTRACT:
A deterioration diagnosis system for an air fuel sensor mounted to an exhaust pipe of an internal combustion engine. The air fuel sensor determines a mixture ratio of air and fuel fed into the internal combustion engine. In the system, an inclination of an output signal of the air-fuel ratio sensor is calculated; variance of the inclination is calculated; deterioration of the air-fuel ratio sensor is determined based on the variance of the inclination.

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Japanese Office Action with partial Translation dated May 25, 2010 (Four (4) page).

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