| 摘要 |
<p>PURPOSE:To efficiently reactivate a filter by incineration of soot by detecting differential pressure or the like before and behind the filter forming a purifying apparatus body and estimating the flow of exhaust gas and the deposition amount of soot in the filter according to the detected value. CONSTITUTION:A cylindrical ceramic filter 1 forming a purifying apparatus body is constructed so that cells 2a, 2b functioning as a passage are disposed in the interior thereof and each one end of the cells are alternately blocked by plugs 3. Both end connecting ports 5, 6 of a container 4 where the ceramic filter 1 is accommodated are respectively connected to a light oil burner 7 and a noise suppressing muffler 8. In this arrangement, pressure transducers 17a, 17b are respectively disposed at engine and filter back pressure measuring ports 16, 17 opened near both end portions of the container 4. According to each pressure detected by the respective pressure transducers 17a, 17b, the flow of exhaust gas and the deposition amount of soot are estimated.</p> |
