Diagnostic apparatus for an exhaust gas sensor

Details Diagnostic apparatus for an exhaust gas sensor Diagnostic apparatus for an exhaust gas sensor

2006-04-04

2006-04-04

Argenbright, Tony M. (Department: 3747)

Internal-combustion engines

Charge forming device

Including exhaust gas condition responsive means

C073S118040, C204S401000

Reexamination Certificate

active

07021300

ABSTRACT:
A deterioration failure diagnostic apparatus is provided for diagnosing an exhaust gas sensor disposed in an exhaust passage of an engine. The apparatus has a unit for generating a detecting signal and multiplying the generated signal to a first basic fuel injection amount to produce a second fuel injection amount. The apparatus includes a unit for calculating a feedback representative value based on feedback correction coefficients and multiplying the feedback representative value to the second fuel injection amount to produce a final fuel injection amount to be input to the engine. The apparatus includes a unit for extracting a frequency response corresponding to the detecting signal from an output of the exhaust gas sensor of the engine, the output being responsive to the calculated final fuel injection amount. A condition of the exhaust gas sensor is determined based on the extracted frequency response.

REFERENCES:
patent: 5325711 (1994-07-01), Hamburg et al.
patent: 5682868 (1997-11-01), Moraal
patent: 5819195 (1998-10-01), Iwata
patent: 6287453 (2001-09-01), Rösel et al.
patent: 6481273 (2002-11-01), Maloney
patent: 6961653 (2005-11-01), Maki
patent: 2005/0005690 (2005-01-01), Maki
patent: 198 44 994 (2000-04-01), None
patent: 102 23 554 (2003-08-01), None
patent: 1 006 353 (2000-06-01), None
patent: 07-145751 (1995-06-01), None

Affiliated with

Also associated with

Rating

Diagnostic apparatus for an exhaust gas sensor does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Diagnostic apparatus for an exhaust gas sensor, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Diagnostic apparatus for an exhaust gas sensor will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3548499