| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a reducing agent supply device capable of preventing inconvenience of respective parts by flowing-in of foreign matter collected in a filter. <P>SOLUTION: This reducing agent supply device includes a reducing agent tank for storing a reducing agent of liquid, a pump for forcibly feeding the reducing agent, a reducing agent injection valve for injecting the reducing agent forcibly fed by the pump into an exhaust pipe of an internal combustion engine, and the filter arranged in the middle of a reducing agent passage to the reducing agent injection valve from the reducing agent tank and collecting the foreign matter in the reducing agent, and performs purge control for collecting the reducing agent in the reducing agent passage and the reducing agent injection valve in the reducing agent tank in response to stopping of the internal combustion engine. The passing direction of the reducing agent passing through the filter in injection control of the reducing agent and the passing direction of the reducing agent passing through the filter in the purge control, are set in the specific direction. <P>COPYRIGHT: (C)2012,JPO&INPIT |
