ACTUATION METHOD OF NOX STORAGE CATALYST

PROBLEM TO BE SOLVED: To obtain a method for effectively actuating an NOx storage catalyst of an internal combustion engine. SOLUTION: A NOx storage catalyst is actuated by a circulatory change from the excess air ratio (absorption stage) of exhaust gas exceeding 1 to an excess air ratio (desorption...

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Hauptverfasser:	STREHLAU WOLFGANG DR, HOEHNE JUERGEN, KREUZER THOMAS DR, LOX EGBERT DR
Format:	Patent
Sprache:	eng
Schlagworte:	BLASTING CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TOTRANSPORTATION 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 GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS HEATING HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS LIGHTING MACHINES OR ENGINES IN GENERAL MECHANICAL ENGINEERING PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL SEPARATION STEAM ENGINES TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE TRANSPORTING WEAPONS
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To obtain a method for effectively actuating an NOx storage catalyst of an internal combustion engine. SOLUTION: A NOx storage catalyst is actuated by a circulatory change from the excess air ratio (absorption stage) of exhaust gas exceeding 1 to an excess air ratio (desorption and response stage) of less than 1. For this, the NOx stored in the catalyst in the absorption stage and separated in the desorption stage is reduced by the storage catalyst under the use of the reduced exhaust gas elements discharged from the internal combustion engine in the desorption stage. As a result, the decrease of NOx in the exhaust gas can be adjusted in a short period of time, making up for the loss of the long time period of the storage capacity of the catalyst.