EXHAUST EMISSION CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINE

PROBLEM TO BE SOLVED: To provide an exhaust emission control device for an internal combustion engine, certainly controlling to an appropriate temperature range without causing torque fluctuation while suppressing the heat deterioration of an exhaust emission control means. SOLUTION: In this exhaust...

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Bibliographische Detailangaben
Hauptverfasser:	KURATA KAZUO, TAKEMURA JUN, SHIGAHARA MEGUMI
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 OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE TRANSPORTING WEAPONS
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide an exhaust emission control device for an internal combustion engine, certainly controlling to an appropriate temperature range without causing torque fluctuation while suppressing the heat deterioration of an exhaust emission control means. SOLUTION: In this exhaust emission control device, an LNT 17 provided in the exhaust passage 11 of a diesel engine 1 is raised to an S purging temperature by raising exhaust temperature by post injection from a fuel injection valve 19, and feedback controlled to an S purging possible temperature range by changing over a λ to rich or lean based on a signal from a temperature sensor 22 for detecting the temperature of the LNT. When changing over to rich or lean, a ratio of a post injection amount to a main injection amount is changed without changing the total injection amount, thereby torque fluctuation by the post injection is reduced. COPYRIGHT: (C)2006,JPO&NCIPI