Patent Number: 6,170,259

Title: Emission control system for an internal-combustion engine

Abstract: An emission control system for an internal-combustion engine has at least one nitrogen oxide adsorber for the periodic adsorption and desorption of nitrogen oxides contained in the exhaust gas of the internal-combustion engine. A desorption gas pipe has an externally heatable catalyst arranged therein to which a mixture of air and/or exhaust gas can be fed as well as fuel at an at least stoichiometric proportion. This mixture is burned to form a desorbing gas flow which is fed to the respective nitrogen oxide adsorber for the nitrogen oxide desorption.

Inventors: Boegner; Walter (Remseck, DE), Haak; Karl-Ernest (Lichtenwald, DE), Krutzsch; Bernd (Denkendorf, DE), Voigtlaender; Dirk (Korntal-Muenchingen, DE), Wenninger; Guenter (Stuttgart, DE), Wirbeleit; Friedrich (Esslingen, DE)

Assignee: DaimlerChrysler AG

International Classification: B01D 53/94 (20060101); F01N 3/08 (20060101); F01N 3/20 (20060101); F01N 7/00 (20060101); F01N 7/02 (20060101); F01N 7/04 (20060101); F02M 25/07 (20060101); F01N 003/00 ()

Expiration Date: 01/09/2018