Exhaust-gas aftertreatment device with nitrogen oxide storage catalytic converter, and operating method therefor
An exhaust-gas aftertreatment device with a nitrogen oxide storage catalytic converter for an internal combustion engine, and a method for operating an exhaust-gas aftertreatment device which is assigned to an internal combustion engine and has a nitrogen oxide storage catalytic converter. An SCR ca...
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| creator | KRUTZSCH BERND VOIGTLANDER DIRK WENNINGER GUNTER GUNTHER JOSEF WEIRICH MARKO RENFFTLEN STEFAN WEIBEL MICHEL BINDER KLAUS OLSCHLEGEL HEINZ-JOST WUNSCH ROLF HERTZBERG ANDREAS KONRAD BRIGITTE |
| description | An exhaust-gas aftertreatment device with a nitrogen oxide storage catalytic converter for an internal combustion engine, and a method for operating an exhaust-gas aftertreatment device which is assigned to an internal combustion engine and has a nitrogen oxide storage catalytic converter. An SCR catalytic converter is arranged in the exhaust-gas aftertreatment device, it being possible for the exhaust gas which emerges from the nitrogen oxide storage catalytic converter to be fed to the SCR catalytic converter when the internal combustion engine is in a desulphating operating mode with a reducing exhaust-gas composition, in order for H2S which is formed during the desulphating to be removed. When the internal combustion engine is in a desulphating operating mode, the following steps are performed: establishing a reducing exhaust gas composition upstream of the nitrogen oxide storage catalytic converter; releasing the sulphur which is bound in the nitrogen oxide storage catalytic converter, to form hydrogen sulphide (H2S); feeding the hydrogen sulphide to an SCR catalytic converter which is arranged downstream of the nitrogen oxide storage catalytic converter in the exhaust-gas aftertreatment device; and reacting the hydrogen sulphide in the SCR catalytic converter to form sulphur dioxide under reducing exhaust-gas conditions. The method may be used in motor vehicles, e.g., passenger cars, with lean-burn internal combustion engines. |
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An SCR catalytic converter is arranged in the exhaust-gas aftertreatment device, it being possible for the exhaust gas which emerges from the nitrogen oxide storage catalytic converter to be fed to the SCR catalytic converter when the internal combustion engine is in a desulphating operating mode with a reducing exhaust-gas composition, in order for H2S which is formed during the desulphating to be removed. When the internal combustion engine is in a desulphating operating mode, the following steps are performed: establishing a reducing exhaust gas composition upstream of the nitrogen oxide storage catalytic converter; releasing the sulphur which is bound in the nitrogen oxide storage catalytic converter, to form hydrogen sulphide (H2S); feeding the hydrogen sulphide to an SCR catalytic converter which is arranged downstream of the nitrogen oxide storage catalytic converter in the exhaust-gas aftertreatment device; and reacting the hydrogen sulphide in the SCR catalytic converter to form sulphur dioxide under reducing exhaust-gas conditions. The method may be used in motor vehicles, e.g., passenger cars, with lean-burn internal combustion engines.</description><edition>7</edition><language>eng</language><subject>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 ; PERFORMING OPERATIONS ; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL ; SEPARATION ; STEAM ENGINES ; SUPPLYING COMBUSTION ENGINES IN GENERAL, WITH COMBUSTIBLEMIXTURES OR CONSTITUENTS THEREOF ; TRANSPORTING ; WEAPONS</subject><creationdate>2003</creationdate><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=20030327&DB=EPODOC&CC=US&NR=2003056499A1$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,308,776,881,25542,76290</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=20030327&DB=EPODOC&CC=US&NR=2003056499A1$$EView_record_in_European_Patent_Office$$FView_record_in_$$GEuropean_Patent_Office$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>KRUTZSCH BERND</creatorcontrib><creatorcontrib>VOIGTLANDER DIRK</creatorcontrib><creatorcontrib>WENNINGER GUNTER</creatorcontrib><creatorcontrib>GUNTHER JOSEF</creatorcontrib><creatorcontrib>WEIRICH MARKO</creatorcontrib><creatorcontrib>RENFFTLEN STEFAN</creatorcontrib><creatorcontrib>WEIBEL MICHEL</creatorcontrib><creatorcontrib>BINDER KLAUS</creatorcontrib><creatorcontrib>OLSCHLEGEL HEINZ-JOST</creatorcontrib><creatorcontrib>WUNSCH ROLF</creatorcontrib><creatorcontrib>HERTZBERG ANDREAS</creatorcontrib><creatorcontrib>KONRAD BRIGITTE</creatorcontrib><title>Exhaust-gas aftertreatment device with nitrogen oxide storage catalytic converter, and operating method therefor</title><description>An exhaust-gas aftertreatment device with a nitrogen oxide storage catalytic converter for an internal combustion engine, and a method for operating an exhaust-gas aftertreatment device which is assigned to an internal combustion engine and has a nitrogen oxide storage catalytic converter. An SCR catalytic converter is arranged in the exhaust-gas aftertreatment device, it being possible for the exhaust gas which emerges from the nitrogen oxide storage catalytic converter to be fed to the SCR catalytic converter when the internal combustion engine is in a desulphating operating mode with a reducing exhaust-gas composition, in order for H2S which is formed during the desulphating to be removed. When the internal combustion engine is in a desulphating operating mode, the following steps are performed: establishing a reducing exhaust gas composition upstream of the nitrogen oxide storage catalytic converter; releasing the sulphur which is bound in the nitrogen oxide storage catalytic converter, to form hydrogen sulphide (H2S); feeding the hydrogen sulphide to an SCR catalytic converter which is arranged downstream of the nitrogen oxide storage catalytic converter in the exhaust-gas aftertreatment device; and reacting the hydrogen sulphide in the SCR catalytic converter to form sulphur dioxide under reducing exhaust-gas conditions. The method may be used in motor vehicles, e.g., passenger cars, with lean-burn internal combustion engines.</description><subject>BLASTING</subject><subject>COMBUSTION ENGINES</subject><subject>COMBUSTION ENGINES IN GENERAL</subject><subject>CONTROLLING COMBUSTION ENGINES</subject><subject>ENGINE PLANTS IN GENERAL</subject><subject>GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNALCOMBUSTION ENGINES</subject><subject>GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES ORENGINES IN GENERAL</subject><subject>HEATING</subject><subject>HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS</subject><subject>INTERNAL-COMBUSTION PISTON ENGINES</subject><subject>LIGHTING</subject><subject>MACHINES OR ENGINES IN GENERAL</subject><subject>MECHANICAL ENGINEERING</subject><subject>PERFORMING OPERATIONS</subject><subject>PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL</subject><subject>SEPARATION</subject><subject>STEAM ENGINES</subject><subject>SUPPLYING COMBUSTION ENGINES IN GENERAL, WITH COMBUSTIBLEMIXTURES OR CONSTITUENTS THEREOF</subject><subject>TRANSPORTING</subject><subject>WEAPONS</subject><fulltext>true</fulltext><rsrctype>patent</rsrctype><creationdate>2003</creationdate><recordtype>patent</recordtype><sourceid>EVB</sourceid><recordid>eNqNy7EKwjAURuEuDqK-wwVXC9Wq0FGk4q7O5ZL-TQJtEpJrrW-vgw_gdJbvzLNQT4afSXLNibgTRIlgGeCEWoxWgV5WDDkr0Ws48pNtQUl8ZA1SLNy_xSpS3o3fGXFD7FryAZHFOk0DxPiWxCCi83GZzTruE1a_LrL1pb6frzmCb5ACKzhI87jtiqIsDsd9VZ225X_qA_WvRUU</recordid><startdate>20030327</startdate><enddate>20030327</enddate><creator>KRUTZSCH BERND</creator><creator>VOIGTLANDER DIRK</creator><creator>WENNINGER GUNTER</creator><creator>GUNTHER JOSEF</creator><creator>WEIRICH MARKO</creator><creator>RENFFTLEN STEFAN</creator><creator>WEIBEL MICHEL</creator><creator>BINDER KLAUS</creator><creator>OLSCHLEGEL HEINZ-JOST</creator><creator>WUNSCH ROLF</creator><creator>HERTZBERG ANDREAS</creator><creator>KONRAD BRIGITTE</creator><scope>EVB</scope></search><sort><creationdate>20030327</creationdate><title>Exhaust-gas aftertreatment device with nitrogen oxide storage catalytic converter, and operating method therefor</title><author>KRUTZSCH BERND ; VOIGTLANDER DIRK ; WENNINGER GUNTER ; GUNTHER JOSEF ; WEIRICH MARKO ; RENFFTLEN STEFAN ; WEIBEL MICHEL ; BINDER KLAUS ; OLSCHLEGEL HEINZ-JOST ; WUNSCH ROLF ; HERTZBERG ANDREAS ; KONRAD BRIGITTE</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-epo_espacenet_US2003056499A13</frbrgroupid><rsrctype>patents</rsrctype><prefilter>patents</prefilter><language>eng</language><creationdate>2003</creationdate><topic>BLASTING</topic><topic>COMBUSTION ENGINES</topic><topic>COMBUSTION ENGINES IN GENERAL</topic><topic>CONTROLLING COMBUSTION ENGINES</topic><topic>ENGINE PLANTS IN GENERAL</topic><topic>GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNALCOMBUSTION ENGINES</topic><topic>GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES ORENGINES IN GENERAL</topic><topic>HEATING</topic><topic>HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS</topic><topic>INTERNAL-COMBUSTION PISTON ENGINES</topic><topic>LIGHTING</topic><topic>MACHINES OR ENGINES IN GENERAL</topic><topic>MECHANICAL ENGINEERING</topic><topic>PERFORMING OPERATIONS</topic><topic>PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL</topic><topic>SEPARATION</topic><topic>STEAM ENGINES</topic><topic>SUPPLYING COMBUSTION ENGINES IN GENERAL, WITH COMBUSTIBLEMIXTURES OR CONSTITUENTS THEREOF</topic><topic>TRANSPORTING</topic><topic>WEAPONS</topic><toplevel>online_resources</toplevel><creatorcontrib>KRUTZSCH BERND</creatorcontrib><creatorcontrib>VOIGTLANDER DIRK</creatorcontrib><creatorcontrib>WENNINGER GUNTER</creatorcontrib><creatorcontrib>GUNTHER JOSEF</creatorcontrib><creatorcontrib>WEIRICH MARKO</creatorcontrib><creatorcontrib>RENFFTLEN STEFAN</creatorcontrib><creatorcontrib>WEIBEL MICHEL</creatorcontrib><creatorcontrib>BINDER KLAUS</creatorcontrib><creatorcontrib>OLSCHLEGEL HEINZ-JOST</creatorcontrib><creatorcontrib>WUNSCH ROLF</creatorcontrib><creatorcontrib>HERTZBERG ANDREAS</creatorcontrib><creatorcontrib>KONRAD BRIGITTE</creatorcontrib><collection>esp@cenet</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>KRUTZSCH BERND</au><au>VOIGTLANDER DIRK</au><au>WENNINGER GUNTER</au><au>GUNTHER JOSEF</au><au>WEIRICH MARKO</au><au>RENFFTLEN STEFAN</au><au>WEIBEL MICHEL</au><au>BINDER KLAUS</au><au>OLSCHLEGEL HEINZ-JOST</au><au>WUNSCH ROLF</au><au>HERTZBERG ANDREAS</au><au>KONRAD BRIGITTE</au><format>patent</format><genre>patent</genre><ristype>GEN</ristype><title>Exhaust-gas aftertreatment device with nitrogen oxide storage catalytic converter, and operating method therefor</title><date>2003-03-27</date><risdate>2003</risdate><abstract>An exhaust-gas aftertreatment device with a nitrogen oxide storage catalytic converter for an internal combustion engine, and a method for operating an exhaust-gas aftertreatment device which is assigned to an internal combustion engine and has a nitrogen oxide storage catalytic converter. An SCR catalytic converter is arranged in the exhaust-gas aftertreatment device, it being possible for the exhaust gas which emerges from the nitrogen oxide storage catalytic converter to be fed to the SCR catalytic converter when the internal combustion engine is in a desulphating operating mode with a reducing exhaust-gas composition, in order for H2S which is formed during the desulphating to be removed. When the internal combustion engine is in a desulphating operating mode, the following steps are performed: establishing a reducing exhaust gas composition upstream of the nitrogen oxide storage catalytic converter; releasing the sulphur which is bound in the nitrogen oxide storage catalytic converter, to form hydrogen sulphide (H2S); feeding the hydrogen sulphide to an SCR catalytic converter which is arranged downstream of the nitrogen oxide storage catalytic converter in the exhaust-gas aftertreatment device; and reacting the hydrogen sulphide in the SCR catalytic converter to form sulphur dioxide under reducing exhaust-gas conditions. The method may be used in motor vehicles, e.g., passenger cars, with lean-burn internal combustion engines.</abstract><edition>7</edition><oa>free_for_read</oa></addata></record> |
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| subjects | 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 PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL SEPARATION STEAM ENGINES SUPPLYING COMBUSTION ENGINES IN GENERAL, WITH COMBUSTIBLEMIXTURES OR CONSTITUENTS THEREOF TRANSPORTING WEAPONS |
| title | Exhaust-gas aftertreatment device with nitrogen oxide storage catalytic converter, and operating method therefor |
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