DEVICE FOR DIAGNOSING CAUSES OF DECREASES IN NOx CONVERSION EFFICIENCY
There is provided an apparatus for diagnosing causes of NO X conversion efficiency degradation capable of an on-board diagnostics for specifying a cause of NO X conversion efficiency degradation. The apparatus for diagnosing causes of NO X conversion efficiency degradation includes: a diagnosis exha...
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| creator | NAGAOKA, Daiji NAKADA, Teruo |
| description | There is provided an apparatus for diagnosing causes of NO X conversion efficiency degradation capable of an on-board diagnostics for specifying a cause of NO X conversion efficiency degradation. The apparatus for diagnosing causes of NO X conversion efficiency degradation includes: a diagnosis exhaust-pipe fuel injection control unit (2) that performs control such that exhaust-pipe fuel injection is performed for diagnosis purposes when a NO X conversion efficiency is degraded; a NO X purification device failure specifying unit (5) that specifies a cause of NO X conversion efficiency degradation as a NO X purification device failure if a difference between an actual heat generation amount and a theoretical heat generation amount in the oxidizing catalyst device at the time of the exhaust-pipe fuel injection is within a threshold value; and an oxidizing catalyst device failure specifying unit (6) that specifies a cause of NO X conversion efficiency degradation as an oxidizing catalyst device failure if a difference between an actual heat generation amount and a theoretical heat generation amount in the oxidizing catalyst device at the time of exhaust-pipe fuel injection exceeds a threshold value. |
| format | Patent |
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The apparatus for diagnosing causes of NO X conversion efficiency degradation includes: a diagnosis exhaust-pipe fuel injection control unit (2) that performs control such that exhaust-pipe fuel injection is performed for diagnosis purposes when a NO X conversion efficiency is degraded; a NO X purification device failure specifying unit (5) that specifies a cause of NO X conversion efficiency degradation as a NO X purification device failure if a difference between an actual heat generation amount and a theoretical heat generation amount in the oxidizing catalyst device at the time of the exhaust-pipe fuel injection is within a threshold value; and an oxidizing catalyst device failure specifying unit (6) that specifies a cause of NO X conversion efficiency degradation as an oxidizing catalyst device failure if a difference between an actual heat generation amount and a theoretical heat generation amount in the oxidizing catalyst device at the time of exhaust-pipe fuel injection exceeds a threshold value.</description><language>eng ; fre ; ger</language><subject>BLASTING ; 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 ; LIGHTING ; MACHINES OR ENGINES IN GENERAL ; MECHANICAL ENGINEERING ; PERFORMING OPERATIONS ; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL ; SEPARATION ; STEAM ENGINES ; TRANSPORTING ; WEAPONS</subject><creationdate>2018</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=20180530&DB=EPODOC&CC=EP&NR=2653684B1$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,308,780,885,25564,76547</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=20180530&DB=EPODOC&CC=EP&NR=2653684B1$$EView_record_in_European_Patent_Office$$FView_record_in_$$GEuropean_Patent_Office$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>NAGAOKA, Daiji</creatorcontrib><creatorcontrib>NAKADA, Teruo</creatorcontrib><title>DEVICE FOR DIAGNOSING CAUSES OF DECREASES IN NOx CONVERSION EFFICIENCY</title><description>There is provided an apparatus for diagnosing causes of NO X conversion efficiency degradation capable of an on-board diagnostics for specifying a cause of NO X conversion efficiency degradation. The apparatus for diagnosing causes of NO X conversion efficiency degradation includes: a diagnosis exhaust-pipe fuel injection control unit (2) that performs control such that exhaust-pipe fuel injection is performed for diagnosis purposes when a NO X conversion efficiency is degraded; a NO X purification device failure specifying unit (5) that specifies a cause of NO X conversion efficiency degradation as a NO X purification device failure if a difference between an actual heat generation amount and a theoretical heat generation amount in the oxidizing catalyst device at the time of the exhaust-pipe fuel injection is within a threshold value; and an oxidizing catalyst device failure specifying unit (6) that specifies a cause of NO X conversion efficiency degradation as an oxidizing catalyst device failure if a difference between an actual heat generation amount and a theoretical heat generation amount in the oxidizing catalyst device at the time of exhaust-pipe fuel injection exceeds a threshold value.</description><subject>BLASTING</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>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>TRANSPORTING</subject><subject>WEAPONS</subject><fulltext>true</fulltext><rsrctype>patent</rsrctype><creationdate>2018</creationdate><recordtype>patent</recordtype><sourceid>EVB</sourceid><recordid>eNrjZHBzcQ3zdHZVcPMPUnDxdHT38w_29HNXcHYMDXYNVvB3U3BxdQ5ydQRxPP0U_PwrFJz9_cJcg4I9_f0UXN3cPJ09Xf2cI3kYWNMSc4pTeaE0N4OCm2uIs4duakF-fGpxQWJyal5qSbxrgJGZqbGZhYmToTERSgBInSvk</recordid><startdate>20180530</startdate><enddate>20180530</enddate><creator>NAGAOKA, Daiji</creator><creator>NAKADA, Teruo</creator><scope>EVB</scope></search><sort><creationdate>20180530</creationdate><title>DEVICE FOR DIAGNOSING CAUSES OF DECREASES IN NOx CONVERSION EFFICIENCY</title><author>NAGAOKA, Daiji ; NAKADA, Teruo</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-epo_espacenet_EP2653684B13</frbrgroupid><rsrctype>patents</rsrctype><prefilter>patents</prefilter><language>eng ; fre ; ger</language><creationdate>2018</creationdate><topic>BLASTING</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>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>TRANSPORTING</topic><topic>WEAPONS</topic><toplevel>online_resources</toplevel><creatorcontrib>NAGAOKA, Daiji</creatorcontrib><creatorcontrib>NAKADA, Teruo</creatorcontrib><collection>esp@cenet</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>NAGAOKA, Daiji</au><au>NAKADA, Teruo</au><format>patent</format><genre>patent</genre><ristype>GEN</ristype><title>DEVICE FOR DIAGNOSING CAUSES OF DECREASES IN NOx CONVERSION EFFICIENCY</title><date>2018-05-30</date><risdate>2018</risdate><abstract>There is provided an apparatus for diagnosing causes of NO X conversion efficiency degradation capable of an on-board diagnostics for specifying a cause of NO X conversion efficiency degradation. The apparatus for diagnosing causes of NO X conversion efficiency degradation includes: a diagnosis exhaust-pipe fuel injection control unit (2) that performs control such that exhaust-pipe fuel injection is performed for diagnosis purposes when a NO X conversion efficiency is degraded; a NO X purification device failure specifying unit (5) that specifies a cause of NO X conversion efficiency degradation as a NO X purification device failure if a difference between an actual heat generation amount and a theoretical heat generation amount in the oxidizing catalyst device at the time of the exhaust-pipe fuel injection is within a threshold value; and an oxidizing catalyst device failure specifying unit (6) that specifies a cause of NO X conversion efficiency degradation as an oxidizing catalyst device failure if a difference between an actual heat generation amount and a theoretical heat generation amount in the oxidizing catalyst device at the time of exhaust-pipe fuel injection exceeds a threshold value.</abstract><oa>free_for_read</oa></addata></record> |
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| language | eng ; fre ; ger |
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| subjects | BLASTING 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 LIGHTING MACHINES OR ENGINES IN GENERAL MECHANICAL ENGINEERING PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL SEPARATION STEAM ENGINES TRANSPORTING WEAPONS |
| title | DEVICE FOR DIAGNOSING CAUSES OF DECREASES IN NOx CONVERSION EFFICIENCY |
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