Oxygen sensor deterioration diagnosis apparatus

Details Oxygen sensor deterioration diagnosis apparatus Oxygen sensor deterioration diagnosis apparatus

2005-04-12

2005-04-12

Mohanty, Bibhu (Department: 3747)

Internal-combustion engines

Charge forming device

Including exhaust gas condition responsive means

C123S672000

Reexamination Certificate

active

06877498

ABSTRACT:
An oxygen sensor deterioration diagnosis apparatus includes an oxygen sensor provided in an exhaust system of an internal combustion engine, an air-fuel ratio control unit for controlling an air-fuel ratio, an operation state detection unit for detecting an operation state of the internal combustion engine, an inversion period measurement unit for detecting an inversion period of an output signal of the oxygen sensor, an oxygen sensor deterioration diagnosis unit for performing a deterioration judgment by comparing the inversion period with a previously set judgment period, and a deterioration diagnosis inhibiting unit for inhibiting, when the operation state detection unit detects the operation state of the internal combustion engine having an influence on the inversion period, the measurement of the inversion period in a period of time of the detection.

REFERENCES:
patent: 5533332 (1996-07-01), Uchikawa
patent: 4-72438 (1992-03-01), None
patent: 11-166438 (1999-06-01), None

Affiliated with

Also associated with

Rating

Oxygen sensor deterioration diagnosis apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Oxygen sensor deterioration diagnosis apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Oxygen sensor deterioration diagnosis apparatus will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3389589