EXHAUST EMISSION CONTROL DEVICE OF ENGINE

PROBLEM TO BE SOLVED: To increase an exhaust performance in regeneration while securing the regeneration efficiency of an exhaust emission control catalyst. SOLUTION: When an NOx catalyst is regenerated, the air-fuel ratio of the exhaust gas flowing to the NOx catalyst is controlled using a cylinder...

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Bibliographische Detailangaben
Hauptverfasser:	KURATA KAZUO, KOGA TOKUYUKI, TAKEUCHI TOSHIHIRO, NAKAZAWA SATOSHI, HATAKE MICHIHIRO
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 increase an exhaust performance in regeneration while securing the regeneration efficiency of an exhaust emission control catalyst. SOLUTION: When an NOx catalyst is regenerated, the air-fuel ratio of the exhaust gas flowing to the NOx catalyst is controlled using a cylinder post injection when an engine is under low load or rotated at low speeds and using only an exhaust pipe fuel adding valve when the engine is under high load and rotated at high speeds. In the regeneration where the cylinder post injection is used, an EGR valve is controlled so that the recirculation of the exhaust gas is restricted at a time when unburned fuel is discharged into an exhaust pipe to intermittently recirculate the exhaust gas. COPYRIGHT: (C)2010,JPO&INPIT