| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a device which estimates accumulation degree of particulates and judges the necessity/unnecessity of the regeneration in a simple constitution. SOLUTION: When a second pressure detected by a second pressure sensor 52 reaches a preset prescribed value or less with all of a first - a third valve (V1-V3) being open, a second valve and a third valve are closed to wait till the second pressure detected by the second pressure sensor reaches the preset prescribed value, and when the second pressure detected by the second pressure sensor reaches the preset prescribed value, a first vale is closed and the third valve is opened to measure the differential pressure between the first pressure detected by the first pressure sensor 51 and the second pressure detected by the second pressure sensor, and when the differential pressure is a preset judgment value or more, particulate filters (F1-F4) are judged to be regenerated so that an exhaust throttle valve (V4) is closed for a preset prescribed time.</p> |
