Power plants – Internal combustion engine with treatment or handling of... – Having sensor or indicator of malfunction – unsafeness – or...
Reexamination Certificate
2007-05-08
2010-06-22
Denion, Thomas E. (Department: 3748)
Power plants
Internal combustion engine with treatment or handling of...
Having sensor or indicator of malfunction, unsafeness, or...
C060S274000, C060S285000
Reexamination Certificate
active
07739868
ABSTRACT:
A deterioration diagnostic system of an exhaust gas purifying catalyst includes: an upstream side switching frequency calculator calculating the number of times of switching on the upstream side; a reference value calculator calculating a downstream side rich/lean determination level having a first width; a downstream side rich/lean determination level adjuster setting the first width to a second larger width when the number of times of switching on the upstream side is smaller than a predetermined value; a downstream side switching frequency calculator calculating the number of times of switching on the downstream side; a frequency ratio calculator calculating a frequency ratio between the number of times of switching on the downstream side and the number of times of switching on the upstream side; and a deterioration determiner determining the deterioration of the exhaust gas purifying catalyst when the frequency ratio is larger than a predetermined value.
REFERENCES:
patent: 5732552 (1998-03-01), Matsumoto et al.
patent: 2006/0137326 (2006-06-01), Saito et al.
patent: 8-218853 (1996-08-01), None
Chino Daisuke
Kamura Hitoshi
Saito Kenji
Birch & Stewart Kolasch & Birch, LLP
Denion Thomas E.
Klasterka Audrey
Mitsubishi Jidosha Kogyo Kabushiki Kaisha
LandOfFree
Deterioration diagnostic system of exhaust gas purifying... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Deterioration diagnostic system of exhaust gas purifying..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Deterioration diagnostic system of exhaust gas purifying... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4201861