| 摘要 |
<p>PURPOSE:To simplify a structure of a filter regeneration device by arranging a back wash means on an exhaust passage on the downstream of a filter, and actuating the back wash means according to the operation rate. CONSTITUTION:Back wash nozzles 28a, 28b which are arranged on exhaust passages 22a, 22b on the downstream of filters 24a, 24b, are connected to a high pressure tank 25 through a pipe 26. The operation rate of an engine, such as cumulated rotational speed, is detected by a detection means 31, while a back wash means is operated as required. The construction of a filter regeneration device is simplified.</p> |
