Method for operating an emission control system having nitrogen oxide storage

In a method for operating an emission control system having nitrogen oxide storage, for cleaning up a nitrogen oxide-containing, sulfur-contaminated exhaust gas from combustion equipment, from time to time desulfating phases are performed for releasing sulfur intercalated in the nitrogen oxide stora...

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Bibliographische Detailangaben
1. Verfasser:	HERTZBERG ANDREAS
Format:	Patent
Sprache:	eng
Schlagworte:	BLASTING COMBUSTION ENGINES 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 IGNITION, OTHER THAN COMPRESSION IGNITION, FORINTERNAL-COMBUSTION ENGINES LIGHTING MACHINES OR ENGINES IN GENERAL MECHANICAL ENGINEERING PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL SEPARATION STEAM ENGINES TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES TRANSPORTING WEAPONS
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Beschreibung
Zusammenfassung:	In a method for operating an emission control system having nitrogen oxide storage, for cleaning up a nitrogen oxide-containing, sulfur-contaminated exhaust gas from combustion equipment, from time to time desulfating phases are performed for releasing sulfur intercalated in the nitrogen oxide storage. Two desulfating modes are provided, namely, a main desulfating mode for substantially completely desulfating the nitrogen oxide storage and a partial desulfating mode for partially desulfating same, a lower nitrogen oxide storage minimum temperature and a shorter desulfating target duration being predefined for the partial desulfating processes than for the main desulfating processes. The method may be used, for example, in emission control systems of predominantly lean-combustion operated Otto engines of motor vehicles.