| 摘要 |
<p>PURPOSE:To suppress progressing of clogging of a filter member by forming the captioned apparatus so that exhaust gas is arranged to automatically bypass the filter member and directly discharged into the atomosphere when the concentration of exhaust smoke in the exhaust gas discharged from a diesel engine is very low. CONSTITUTION:When clogging of a filter member 4 installed in an exhaust passage 3 progresses to a prescribed level, and an output is transmitted from a clogging detecting circuit 11, a fuel pump 14 and a blower 15 are operated by a control circuit 1, while a burner 7 is operated for combustion, and the minute particle component in the filter member 4 is burnt to eliminate clogging. A bypath passage 8 which detours around the filter member 4 and the burner 7 is connected to the exhaust passage 3 to form a branch, and a selector valve 9 is installed in the upstream side branched part. The opening of the valve 9 is controlled in accordance with the output of an exhaust smoke concentration detector 10, and also controlled so as to be set at the position for intercepting the exhaust passage 3, when the burner 7 is in operation.</p> |
