Power plants – Internal combustion engine with treatment or handling of... – Methods
Reexamination Certificate
2005-01-18
2005-01-18
Nguyen, Tu M. (Department: 3748)
Power plants
Internal combustion engine with treatment or handling of...
Methods
C060S276000, C060S285000, C060S301000
Reexamination Certificate
active
06843052
ABSTRACT:
An exhaust emission control system having a nitrogen oxide adsorber and a desulfating device, and a method for desulfating a nitrogen oxide absorber are disclosed. The desulfating device is managed so as to establish an oscillatingly rich and lean exhaust gas composition during a respective desulfating operation, and contains an oxygen accumulator downstream from the nitrogen oxide adsorber. The nitrogen oxide adsorber is effectively desulfated by way of a corresponding desulfating method, and released sulfur compounds are thereby simultaneously oxidized. The exhaust emission control systems can be utilized, for example, with a motor vehicle internal combustion engine.
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Hertzberg Andreas
Voigtländer Dirk
Daimler-Chrysler AG
Kenyon & Kenyon
Nguyen Tu M.
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