| 摘要 |
<p>PURPOSE:To make it possible to uniformly regenerate the whole of a filter by forming a heater provided near the filter of plural heater segments, and turning on the heater segments in order at the time of their regenerating, and then renewing the heater segment to be turned on lastly. CONSTITUTION:A filter 15 to collect particulate fuel in exhaust gas is provided in an enlarged diameter part 14 formed on the middle of an exhaust pipe 13. An electric heater 41 for regenerating the filter is provided at an end part on the upstream side of the filter 15, and composed of plural (six in the figure) heater segments 41a-41f being fan-shaped centering around the center of a filter end face. At the time of electric control in regenerating the filter 15, the heater segments are separately turned on in order through a control circuit 51, and controlled to renew the heater segment to be turned on lastly at every regenerating. Thus the occurrence of clogging at a specific portion and the dissolving loss of the filter 15 can be prevented.</p> |
