| 摘要 |
<P>PROBLEM TO BE SOLVED: To purify exhaust gas stably without deteriorating a fuel cost in an exhaust gas purifying apparatus of a diesel engine. <P>SOLUTION: The exhaust gas purifying apparatus includes: a primary diesel particulate filter installed in a primary exhaust line of the diesel engine; a secondary exhaust line branched from the primary exhaust line at a branch point on the upstream side of the primary diesel particulate filter; a secondary diesel particulate filter which is installed in the secondary exhaust line, and has a smaller soot storage capacity than the primary diesel particulate filter; a low pressure part, out of the secondary exhaust line, which is provided on the downstream side of the secondary diesel particulate filter, and applies lower pressure than that of the branch point; and a differential pressure measuring part for measuring a differential pressure generated between an inlet and an outlet of the secondary diesel particulate filter. The secondary exhaust line has a downstream end on the downstream side of the secondary diesel particulate filter, and the downstream end is connected to an air intake part of the diesel engine and the downstream side of the primary diesel particulate filter in the primary exhaust line. <P>COPYRIGHT: (C)2012,JPO&INPIT |
