公开(公告)号：US06574955B2

公开(公告)日：2003-06-10

申请号：US10024626

申请日：2001-12-21

申请人： Doris Schröder ,  Dirk Voigtländer ,  Michel Weibel ,  Günter Wenninger ,  Walter Boegner ,  Kirsten Hardenberg ,  Andreas Hertzberg ,  Günter Karl ,  Bernd Krutzsch ,  Renate Marx ,  Norbert Ruzicka ,  Christof Schön

发明人： Doris Schröder ,  Dirk Voigtländer ,  Michel Weibel ,  Günter Wenninger ,  Walter Boegner ,  Kirsten Hardenberg ,  Andreas Hertzberg ,  Günter Karl ,  Bernd Krutzsch ,  Renate Marx ,  Norbert Ruzicka ,  Christof Schön

IPC分类号： F01N300

CPC分类号： B01D53/9495 ,  B01D53/9409 ,  B01D53/96

摘要： 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.