Engine exhaust emission control device and exhaust emission control method

To control NOx emission into the atmospheric air when abnormality occurs in an engine or SCR unit. [MEANS FOR SOLVING PROBLEMS] An engine C/U (51) detects abnormality occurred in an engine to output the abnormality-indicating signal to an SCR-C/U (61). The SCR-C/U (61) increases or decreases a urea...

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Bibliographische Detailangaben
1. Verfasser:	NISHINA MITSUHIRO,KURITA HIROYUKI,KATOU TOSHIKAZU
Format:	Patent
Sprache:	eng
Schlagworte:	BLASTING CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TOTRANSPORTATION 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 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 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 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:	To control NOx emission into the atmospheric air when abnormality occurs in an engine or SCR unit. [MEANS FOR SOLVING PROBLEMS] An engine C/U (51) detects abnormality occurred in an engine to output the abnormality-indicating signal to an SCR-C/U (61). The SCR-C/U (61) increases or decreases a urea water injection amount according to abnormality occurred. The SCR-C/U (61) detects abnormality occurred in an SCR unit to output the abnormality-indicating signal to the engine C/U (51). The engine C/U (51) controls engine components such as an EGR valve to reduce an NOx exhaust amount.