Desulfurization of nitrogen oxides storage catalyst arranged in exhaust gas pipe of a diesel engine comprises comparing lambda signal before/after catalyst during regeneration or through signal of sensor in lean phase

Desulfurizing a nitrogen oxide (NOx) storage catalyst arranged in the exhaust gas pipe of a diesel engine comprises recognizing the desulfurizing results in a control device using a suitable mathematical model; comparing the lambda signals of a broad spectrum probe after the NOx storage catalyst; an...

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Hauptverfasser:	MERTEN, ULRICH, HEMBERGER, HANS-HUBERT, KRUTZSCH, BERND, LIEBSCHER, THOMAS, ERLENMAYER, OLIVER, RUZICKA, NORBERT, HOFFMANN, MICHAEL, ADLER, HOLGER, ALLMENDINGER, KLAUS, PRIEGER, KLAUS, KERCKHOFF, ANTON, KURZE, STEFAN, BECKER, DIRK, HASERT, ANDREAS, LENZ, MICHAEL, WEIBEL, MICHEL, KLEIN, HARALD, ROLL, ANDREAS
Format:	Patent
Sprache:	eng ; ger
Schlagworte:	BLASTING COMBUSTION ENGINES COMBUSTION ENGINES IN GENERAL CONTROLLING COMBUSTION ENGINES ENGINE PLANTS IN GENERAL GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNALCOMBUSTION ENGINES GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES ORENGINES IN GENERAL HEATING HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS INTERNAL-COMBUSTION PISTON ENGINES LIGHTING MACHINES OR ENGINES IN GENERAL MECHANICAL ENGINEERING STEAM ENGINES SUPPLYING COMBUSTION ENGINES IN GENERAL, WITH COMBUSTIBLEMIXTURES OR CONSTITUENTS THEREOF WEAPONS
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Zusammenfassung:	Desulfurizing a nitrogen oxide (NOx) storage catalyst arranged in the exhaust gas pipe of a diesel engine comprises recognizing the desulfurizing results in a control device using a suitable mathematical model; comparing the lambda signals of a broad spectrum probe after the NOx storage catalyst; and comparing the lambda signal before and after the catalyst during NOx regeneration or through the signal of a NOx sensor in the lean phase. Desulfurizing a NOx storage catalyst arranged in the exhaust gas pipe of a diesel engine comprises recognizing the desulfurizing results in a control device using a suitable mathematical model; comparing the lambda signals of a broad spectrum probe after the NOx storage catalyst; and comparing the lambda signal before and after the catalyst during NOx regeneration or through the signal of a NOx sensor in the lean phase. The required desulfurization temperature is calculated and regulated using sensors and/or a calculating model. The intervals of the lean/rich alternating operation are regulated by constant times or sensors in such a way that the exhaust gas temperature is maintained in the region of 500-800, preferably 600-700 deg C and the frequency of the lean/rich intervals and/or rich jumps is determined from the exhaust gas temperature and the sulfur charge.