| 摘要 |
<p>PURPOSE:To make the ignition of particulate fuel possible in a short time to reduce a load imposed on a battery by making a heater function when a fixed time has elapsed after an exhaust gas flow direction is changed to pass through a bypass pipe in the case where a filter is judged to be at its regenerating time. CONSTITUTION:In an engine provided with an enlarged diameter part 14 having accommodated a filter 15 at the middle of an exhaust pipe 13, the first bypass pipe 21 is provided to connect a coupling part 22 between an engine 11 and the enlarged diameter part 14 with a coupling part 23 between the enlarged diameter part 14 and a muffler 16. In addition, the second bypass pipe 24 is provided to connect a coupling part 25 between the coupling part 22 and the enlarged diameter part 14 with a coupling part 26 between the coupling part 23 and the muffler 16. When the filter is judged to be at regenerating time, change-over valves 31, 32 provided on the bypass pipes 21, 24 respectively are controlled through a control circuit 51 so that exhaust gas may flow through the bypass pipe 21 from the side of a heater 41 into the filter 15, and then discharge through the second bypass pipe 24 from the muffler 16 into the atmosphere.</p> |
