Exhaust gas cleaning method and exhaust gas cleaning system

Details Exhaust gas cleaning method and exhaust gas cleaning system Exhaust gas cleaning method and exhaust gas cleaning system

2004-06-22

2008-11-18

Tran, Binh Q. (Department: 3748)

Power plants

Internal combustion engine with treatment or handling of...

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

C060S274000, C060S278000, C060S285000, C060S297000, C060S301000

Reexamination Certificate

active

07451593

ABSTRACT:
An exhaust gas cleaning method capable of maintaining an optimum NOx purification ratio in the continuously regenerative range of DPF in an exhaust gas cleaning system (1) having an NOx purification function and a PM purification function combined with each other and the exhaust gas cleaning system (1). In the exhaust gas cleaning system (1), NOx purification by an NOx occlusion/reduction type catalyst (42) and PM purification by a continuous regeneration type DPF (41) are preformed for exhaust gas from an internal combustion engine. When the temperature (Tent) of the exhaust gas flowing in the DPF (41b) exceeds the self-burning temperature (Tent0) of PM and the differential pressure increasing rate (dP) of a differential pressure across the DPF (41b) exceeds a specified determination value (dP0), at least either of a control to reduce the frequency of enriching the exhaust gas and a control to reduce the degree of richness is performed in a catalyst regenerative control for regenerating the NOx occlusion/reduction type catalyst (42).

REFERENCES:
patent: 5746989 (1998-05-01), Murachi et al.
patent: 5974791 (1999-11-01), Hirota et al.
patent: 6304815 (2001-10-01), Moraal et al.
patent: 6490857 (2002-12-01), Sasaki
patent: 6901747 (2005-06-01), Tashiro et al.
patent: 6915629 (2005-07-01), Szymkowicz
patent: 7040086 (2006-05-01), Kitahara et al.
patent: 7137246 (2006-11-01), van Nieuwstadt et al.
patent: 7159389 (2007-01-01), Miura
patent: 2000-303826 (2000-10-01), None
patent: 2002-295244 (2002-10-01), None
patent: 2003-65117 (2003-03-01), None

Affiliated with

Also associated with

Rating

Exhaust gas cleaning method and exhaust gas cleaning system 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 cleaning method and exhaust gas cleaning system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Exhaust gas cleaning method and exhaust gas cleaning system will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4031270