EXHAUST EMISSION CONTROL DEVICE AND CONTROL METHOD

PROBLEM TO BE SOLVED: To provide an exhaust emission control device, capable of accurately performing pressure control in a reducing agent supply path to accurately performing injection control of a reducing agent by effectively releasing a gas component present in the reducing agent supply path out...

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Bibliographische Detailangaben
1. Verfasser:	FURUYA YUJI
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, capable of accurately performing pressure control in a reducing agent supply path to accurately performing injection control of a reducing agent by effectively releasing a gas component present in the reducing agent supply path out of the path, and a control method thereof.SOLUTION: The exhaust emission control device 10 for purifying exhaust gas of an internal combustion engine using SCR catalyst and reducing agent includes: a reducing agent tank storing the reducing agent; a reducing agent addition valve for adding the reducing agent to the upstream side of the SCR catalyst; and a reducing agent supply pump 23 for supplying the reducing agent from the reducing agent tank to the reducing agent addition valve through the reducing agent supply path. The control device further includes a negative pressure generation means 30 for sucking the gas component in the reducing agent supply path and releasing it out of the reducing agent supply path.