Apparatus for and method of detecting deterioration of...

Power plants – Internal combustion engine with treatment or handling of... – Having sensor or indicator of malfunction – unsafeness – or...

Reexamination Certificate

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

C060S274000, C060S276000, C060S285000, C123S443000

Reexamination Certificate

active

11010353

ABSTRACT:
An apparatus for detecting deterioration of a catalyst in an internal combustion engine initially biases an air/fuel ratio of an air-fuel mixture supplied to the internal combustion engine to a rich amount so that an amount of oxygen stored in the catalyst is substantially zero. Then, the apparatus detects deterioration of the catalyst by alternating the air/fuel ratio lean or rich based on an amount of oxygen given to the catalyst. If the catalyst has deteriorated, a bias amount of the air/fuel ratio is set so that the amount of oxygen stored in the catalyst is substantially saturated. If the catalyst is normal, a bias amount of the air/fuel ratio is set so that the amount of oxygen stored in the catalyst is not saturated.

REFERENCES:
patent: 5515826 (1996-05-01), Hamburg et al.
patent: 5656765 (1997-08-01), Gray
patent: 5713199 (1998-02-01), Takeshima et al.
patent: 6487849 (2002-12-01), Bidner et al.
patent: 6567738 (2003-05-01), Gopp et al.
patent: 6594989 (2003-07-01), Hepburn et al.
patent: 6668813 (2003-12-01), Azuma et al.
patent: 2002/0157379 (2002-10-01), Kakuyama et al.
patent: A 6-81632 (1994-03-01), None
patent: A 2000-8838 (2000-01-01), None
patent: A 2002-130018 (2002-05-01), None
patent: A 2004-108187 (2004-04-01), None

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Apparatus for and method of detecting deterioration of... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Apparatus for and method of detecting deterioration of..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus for and method of detecting deterioration of... will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-3724559

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.