The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 10, 2003
Filed:
Dec. 21, 2001
Doris Schröder, Sindelfingen, DE;
Dirk Voigtländer, Korntal-Münchingen, DE;
Michel Weibel, Stuttgart, DE;
Günter Wenninger, Stuttgart, DE;
Walter Boegner, Remseck, DE;
Kirsten Hardenberg, Stuttgart, DE;
Andreas Hertzberg, Stuttgart, DE;
Günter Karl, Esslingen, DE;
Bernd Krutzsch, Denkendorf, DE;
Renate Marx, Leonberg, DE;
Norbert Ruzicka, Steinenbronn, DE;
Christof Schön, Remshalden, DE;
DaimlerChrysler AG, Stuttgart, DE;
Abstract
A method for the desulfurization of a nitrogen oxide adsorber of an exhaust gas purification device for a combustion system employs desulfurization phases that are intermittently implemented by a desulfurization control unit. During each desulfurization phase, the carbon monoxide concentration and/or the lambda value of the exhaust gas stream exiting the nitrogen oxide adsorber is recorded. A localized maximum that appears in the recorded course of the carbon monoxide concentration over time, or a downward slope that appears in the established course of the lambda value over time, falling from a temporary plateau value, is employed as criterion for terminating the desulfurization phase. The method may be used, for example, in exhaust gas purification devices in primarily lean-burning vehicle combustion engines.