EXHAUST EMISSION CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINE

PROBLEM TO BE SOLVED: To provide the exhaust emission control device to prevent an EGR (Exhaust Gas Recirculation) from recirculating debris of a DPF (Diesel Particulate Filter) into an intake system of the engine when there is a possibility that the DPF might be damaged. SOLUTION: An ECU 17 determi...

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Bibliographische Detailangaben
Hauptverfasser:	YONEMUSHI YUSUKE, SHIRAISHI TOMOHIKO, KAMEOKA TOYOHIKO, SUZUKI TEPPEI
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 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
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide the exhaust emission control device to prevent an EGR (Exhaust Gas Recirculation) from recirculating debris of a DPF (Diesel Particulate Filter) into an intake system of the engine when there is a possibility that the DPF might be damaged. SOLUTION: An ECU 17 determines during regeneration of the DPF 12 if there is a possibility that the DPF 12 is damaged according to a value (exhaust gas temperature TDPF) detected by an exhaust gas temperature sensor 15 in view of a threshold value T1, and if affirmative, immediately outputs a control signal to the EGR valve 161 so as to completely close the valve 161. COPYRIGHT: (C)2009,JPO&INPIT