| 摘要 |
<p>PROBLEM TO BE SOLVED: To regenerate a filter for collecting a particle contained in the exhausted gas of an engine at appropriate timing. SOLUTION: In order to estimate the particulate deposit amounts of a first and second filters 61, 62, a first estimating part 100 outputting a first estimated data XA by operating with a differential pressure before and after the filter and a second estimating part 110 outputting a second estimated data XB by integrating the particulate deposit per unit time operated depending on a parameter are provided, and more reliable estimated data are selected out of the first and second estimated data XA, XB judging from the numbers of the rotation of the engine to decide whether the filter should be regenerated or not.</p> |
