METHOD AND DEVICE FOR DESULFATING A NITROGEN OXIDE ADSORBER

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/o...

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Bibliographische Detailangaben
Hauptverfasser:	BOEGNER, WALTER, WENNINGER, GUENTER, MARX, RENATE, SCHOEN, CHRISTOF, SCHROEDER, DORIS, VOIGTLAENDER, DIRK, HERTZBERG, ANDREAS, KARL, GUENTER, KRUTZSCH, BERND, HARDENBERG, KIRSTEN, RUZICKA, NORBERT, WEIBEL, MICHEL
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	BLASTING COMBUSTION ENGINES CONTROLLING COMBUSTION ENGINES HEATING HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS LIGHTING MECHANICAL ENGINEERING PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL SEPARATION TRANSPORTING WEAPONS
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Beschreibung
Zusammenfassung:	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.