Exhaust gas purifying device for an internal combustion engine

Details Exhaust gas purifying device for an internal combustion engine Exhaust gas purifying device for an internal combustion engine

2011-08-09

2011-08-09

Denion, Thomas E (Department: 3748)

Power plants

Internal combustion engine with treatment or handling of...

By means producing a chemical reaction of a component of the...

C060S276000, C060S301000

Reexamination Certificate

active

07992378

ABSTRACT:
An exhaust gas purifying device for an internal combustion engine, comprises: an exhaust purifying catalyst; a NOx purifying catalyst disposed downstream of the exhaust purifying catalyst; upstream and downstream A/F detecting sensors disposed on upstream and downstream sides of the exhaust purifying catalyst, respectively; means for supplying a reducing agent to the NOx purifying catalyst when conducting a reduction control of the NOx; means for calculating an amount of reduced NOx in the NOx purifying catalyst; means for terminating the reduction control when the amount of reduced NOx exceeds a prescribed reduction termination threshold value; means for detecting a degree of deterioration of the exhaust purifying catalyst based on an output from the upstream and downstream A/F detecting sensors; a threshold value correcting means for correcting the reduction termination threshold value according to the degree of deterioration of the exhaust purifying catalyst; and a correction prohibiting means for prohibiting the correction of the reduction termination threshold value when an amount of H2and/or CH4in the exhaust gas exceeds a prescribed correction prohibiting judgment value.

REFERENCES:
patent: 5386695 (1995-02-01), Iwata et al.
patent: 5487270 (1996-01-01), Yamashita et al.
patent: 5636514 (1997-06-01), Seki
patent: 19918875 (1999-10-01), None
patent: 8-303280 (1996-11-01), None
patent: 2845103 (1998-10-01), None
patent: 11-311142 (1999-11-01), None
patent: 2003-74334 (2003-03-01), None
patent: 2006-207487 (2006-08-01), None
patent: 2005/103461 (2005-11-01), None

Affiliated with

Also associated with

Rating

Exhaust gas purifying device for an internal combustion engine does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Exhaust gas purifying device for an internal combustion engine, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Exhaust gas purifying device for an internal combustion engine will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2660342