| 摘要 |
<p>PURPOSE:To obtain efficient recycling, in a method by which carbon particles collected by a collector from exhaust gas are incinerated and recycled, by ending the recycling operation when the exhaust gas temperature at the collector outlet exceeds the prescribed value. CONSTITUTION:A particle collector 3 is interposed between an inlet pipe 1 connected to the exhaust port of an internal combustion engine and an outlet pipe 2, while the inlet pipe 1 and the outlet pipe 2 are connected to each other by a bypass pipe 6. The inlet pipe 1 and the bypass pipe 6 are provided with interposed valves 9 and 10, and the opening/closing operation of these valves 9 and 10 are controlled independently by diaphragm units 13 and 14 respectively. Diaphragm chambers 16 and 17 of the diaphragm units 13 and 14 are connected respectively ports (a) of negative pressure control valves 20 and 21 which are controlled by a control unit 25. This control unit 25 stops the recycling operation as soon as the output from a temperature sensor 27 that detects the temperature of exhaust gas at the outlet of the collector 3 reaches the prescribed value during the recycling operation of the collector 3 that is started by electrifying an electric heater 5.</p> |
