| 摘要 |
<P>PROBLEM TO BE SOLVED: To improve the mounting property of an exhaust purification device capable of simultaneously reducing both particulates and NOx than before, and to suppress pressure loss. <P>SOLUTION: The exhaust purification device has a selective reduction type catalyst 3 in the middle of an exhaust pipe 4 and is adapted such that urea water 7 as a reducing agent is added upstream of the selective reduction type catalyst 3 to reduce and purify NOx. The device further has an oxidation catalyst 2 placed upstream of the position at which the urea water 7 is added and oxidizes HC in an exhaust gas 5, and a particulate filter 1 which carries a hydrolysis catalyst for hydrolyzing the urea water 7 into ammonium and a carbon dioxide gas and is placed between the position at which the urea water 7 is added and the selective reduction type catalyst 3. <P>COPYRIGHT: (C)2009,JPO&INPIT |
