Exhaust gas aftertreatment installation and method

Details Exhaust gas aftertreatment installation and method Exhaust gas aftertreatment installation and method

2007-05-01

2007-05-01

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, C060S286000, C060S301000, C060S303000, C422S171000, C422S172000, C422S178000, C423S212000, C423S213200, C423S213500, C423S213700, C423S239100

Reexamination Certificate

active

10541311

ABSTRACT:
An exhaust gas aftertreatment installment and associated exhaust gas aftertreatment method utilizes a nitrogen oxide storage catalytic converter and an SCR catalytic converter. A particulate filter is provided upstream of the nitrogen oxide storage catalytic converter or between the latter and the SCR catalytic converter or downstream of the SCR catalytic converter. The time of regeneration operating phases of the nitrogen oxide storage catalytic converter can be determined as a function of the nitrogen oxide content of the exhaust gas downstream of the nitrogen oxide storage catalytic converter or of the SCR catalytic converter and/or as a function of the ammonia loading of the latter. Moreover, a desired ammonia generation quantity can be determined for a respective regeneration operating phase. The installation and method are adopted for use for motor vehicle internal combustion engines and other engines which are operated predominantly in lean-burn mode.

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A. Bunting, “Springing the Trap”, Automotive Engineer, May 2000, pp. 73-74, vol. 25, No. 5, Mechanical Engineering Publ. Ltd., Great Britain, XP000936087, ISSN: 0307-6490.
International Search Report dated Apr. 1, 2004.

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