REDUCING AGENT SUPPLY DEVICE

PROBLEM TO BE SOLVED: To provide a reducing agent supply device capable of improving reliability by eliminating necessity to open a reducing agent injection valve when a reducing agent is filled in starting an internal combustion engine and when a purge is controlled in stopping the internal combust...

Ausführliche Beschreibung

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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 a reducing agent supply device capable of improving reliability by eliminating necessity to open a reducing agent injection valve when a reducing agent is filled in starting an internal combustion engine and when a purge is controlled in stopping the internal combustion engine.SOLUTION: This reducing agent supply device is configured to perform purge control for recovering the reducing agent in a reducing agent passage and the reducing agent injection valve to a reducing agent tank in association with stopping of the internal combustion engine. The device includes a purging passage having one end connected to an injection module and communicating with the reducing agent passage and the other end connected to the reducing agent tank. When starting the internal combustion engine, a control device drives a pump with the reducing agent injection valve closed to fill the reducing agent while bleeding air through the purging passage, and, when stopping the internal combustion engine, the control device drives the pump with the reducing agent confined to recover the reducing agent while introducing the air through the purging passage.