发明名称 REDUCING AGENT SUPPLY SYSTEM
摘要 <P>PROBLEM TO BE SOLVED: To suppress precipitation of urea or the like after pump drive is stopped, and to suitably add and supply a reducing agent aqueous solution, by extension. <P>SOLUTION: A urea water addition valve 15 is connected to a urea water tank 21 via a urea water supply pipe 22. A urea water pump 23 is disposed at the urea water supply pipe 22 such that the urea water pump 23 is not immersed in urea water in the urea water tank 21. The urea water supply pipe 22 is provided with: a filter device 25 for storing urea water fed by the urea water pump 23; and a first check valve 24 for supplying the urea water stored in the filter device 25 by prescribed amounts to the urea water pump 23 in a state where a drive of the urea water pump 23 is stopped. <P>COPYRIGHT: (C)2010,JPO&INPIT
申请公布号 JP2010007617(A) 申请公布日期 2010.01.14
申请号 JP20080170020 申请日期 2008.06.30
申请人 DENSO CORP 发明人 OKAJIMA MASAHIRO;NISHIJIMA YOSHIAKI
分类号 F01N3/08;B01D53/34;B01D53/56;B01D53/74;B01D53/94;F01N3/28 主分类号 F01N3/08
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