EXHAUST EMISSION CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINE

PROBLEM TO BE SOLVED: To provide an exhaust emission control device for an internal combustion engine, reducing NOx emissions while maintaining a high rate of CO conversion. SOLUTION: This exhaust emission control device for the engine 1 includes: an oxidation catalyst 31; a CO conversion-rate calcu...

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Bibliographische Detailangaben
Hauptverfasser:	SATO NAOHIRO, WADA KATSUJI, YAMAMOTO OSAMI, HASHIMOTO MASASATO
Format:	Patent
Sprache:	eng
Schlagworte:	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
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide an exhaust emission control device for an internal combustion engine, reducing NOx emissions while maintaining a high rate of CO conversion. SOLUTION: This exhaust emission control device for the engine 1 includes: an oxidation catalyst 31; a CO conversion-rate calculation part 42 calculating the rate of CO conversion of the oxidation catalyst 31; an EGR passage 6 recirculating part of exhaust gas from the engine 1 into the intake pipe 2 of the engine 1; and an EGR control part 41 controlling the recirculation of exhaust gas through the EGR passage 6 based on the rate of CO conversion calculated by the CO conversion rate calculation part 42. COPYRIGHT: (C)2011,JPO&INPIT