Exhaust system for a lean burn internal combustion engine

Details Exhaust system for a lean burn internal combustion engine Exhaust system for a lean burn internal combustion engine

2005-11-17

2010-11-16

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...

C060S274000, C060S295000, C060S301000, C060S311000

Reexamination Certificate

active

07832203

ABSTRACT:
An exhaust system for an internal combustion engine has a catalyzed ceramic wall flow particulate filter coated with a washcoat composition. The washcoat composition includes an oxidation catalyst of at least one platinum group metal and a NOxabsorbent. The washcoat composition has a D50 of less than or equal to 8 μm. The NOxabsorbent absorbs NOxcontained in an exhaust gas when the composition of the exhaust gas is lambda >1, and releases the NOxabsorbed in the NOxabsorbent when the exhaust gas composition is 1≧lambda. The exhaust system has a platinum group metal catalyst upstream of the filter for oxidizing NO to NO2at least when the composition of the exhaust gas is lambda >1. The uncoated portions of the ceramic wall flow particulate filter have a porosity of >40% and a mean pore size of 8-25 μm.

REFERENCES:
patent: 4902487 (1990-02-01), Cooper et al.
patent: 5206202 (1993-04-01), Lachman et al.
patent: 5213781 (1993-05-01), Abe et al.
patent: 5746989 (1998-05-01), Murachi et al.
patent: 6413483 (2002-07-01), Brisley et al.
patent: 6753294 (2004-06-01), Brisley et al.
patent: 6855297 (2005-02-01), Van Den Bussche et al.
patent: 6863874 (2005-03-01), Twigg
patent: 196 36 041 (1998-03-01), None
patent: 199 41 439 (2000-03-01), None
patent: 0 341 832 (1989-11-01), None
patent: 0 560 991 (1993-09-01), None
patent: 0 758 713 (1997-02-01), None
patent: 0 893 154 (1999-01-01), None
patent: 0 984 146 (2000-03-01), None
patent: 1 008 379 (2000-06-01), None
patent: 1 033 161 (2000-09-01), None
patent: 1 079 084 (2001-02-01), None
patent: 1 108 460 (2001-06-01), None
patent: 9-53442 (1997-02-01), None
patent: 2722987 (1998-03-01), None
patent: 2001-173426 (2001-06-01), None
patent: 2001-207836 (2001-08-01), None
patent: 2001-227324 (2001-08-01), None
patent: WO-00/21647 (2000-04-01), None
patent: WO 01/12320 (2001-02-01), None
patent: WO-02/18753 (2002-03-01), None

Affiliated with

Also associated with

Rating

Exhaust system for a lean burn 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 system for a lean burn internal combustion engine, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Exhaust system for a lean burn internal combustion engine will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4243263