Exhaust emission purifying apparatus for engine

An exhaust emission purifying apparatus for an engine comprising: a reduction catalytic converter (5) disposed in an exhaust system of the engine, for reductively purifying nitrogen oxides in exhaust emission with a reducing agent; an injection nozzle (7) arranged for injection-supplying the reducin...

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Bibliographische Detailangaben
Hauptverfasser:	MIYATA, TATSUJI, HIRATA, KIMINOBU, MASAKI, NOBUHIKO
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	BLASTING CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TOTRANSPORTATION 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 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:	An exhaust emission purifying apparatus for an engine comprising: a reduction catalytic converter (5) disposed in an exhaust system of the engine, for reductively purifying nitrogen oxides in exhaust emission with a reducing agent; an injection nozzle (7) arranged for injection-supplying the reducing agent to an upstream side of the exhaust emission flow with respect to the reduction catalytic converter within an exhaust passage (3) of the exhaust system; and a reducing agent supply device (8) arranged for supplying the reducing agent to the injection nozzle (7), wherein the apparatus further comprises blocking means which is detachably disposed for blocking an exhaust passage portion between a portion of the exhaust passage (24), to which the reducing agent injection-supplied from said injection nozzle (7) is attached, and another portion of the exhaust passage (25), on which at least said reduction catalytic converter (5) is disposed, and a feed port (21) for feeding washing water and a drain port (22) for drainage of the washing water are provided on a wall portion of the exhaust passage at the portion to which said reducing agent is attached.