| 摘要 |
<p>PROBLEM TO BE SOLVED: To attain reduction of weight and size of an air supply source and enable blowing with small pressure loss by improving thermal conductivity, heat resistance and air permeability of a filter member, adopting exposing method with which burning of particulates is promoted with blowing of a low pressure electric fan, and arranging an interruption valve so as to prevent flowing of exhaust gas from the engine into the electric fan side and interrupt heat flow. SOLUTION: A reactivation start command switch 5 is started on necessity of removal of particulates. Stopping of an engine 1 is confirmed through ignition voltage 2, for opening an interruption valve 6 from a control circuit 4. An electric fan 7 is started for blowing toward a circular space inside a trapper 11. Heating of an electrothermal heater 12 is commanded for igniting the particulates adhered to all range of a filter 13. The particulates inside the trapper 11 are burned and removed. When engine starting is sensed during removal of the particulates, command is transmitted from the control circuit 4 to close the interruption valve 6, to stop the electric fan 7, and stop current carrying to the electrothermal heater 12. Exhaust gas of the engine is prevented from flowing toward the electrid fan 7, and damage of a unit is prevented.</p> |
