| 摘要 |
<p>PURPOSE:To raise the temperature of exhaust gas above the natural temperature of minute particle by installing an electrical heater on the upstream side of a collector member installed in the exhaust passage of a Diesel engine and controlling the amount of exhaust gas which passes through the electrical heater by the control valves installed in intake and exhaust passages. CONSTITUTION:The collector member 11 of a trapper 10 for collecting minute particles is installed in the exhaust passage 9 of a Diesel engine 1, and an electrical heater 12 is arranged at a departed position on the upstream side of the collector member 11. A bypass passage 13 equipped with a control valve 14 is arranged in parallel onto the trapper 10, and the control valve 14 is closed in the ordinary operation. At the regeneration time for the collector member 11, a controller 17 puts the electrical heater 12 into conduction through a relay 19 and adjusts the opening degree of a throttle valve 4 to a prescribed position. Then, the throttle bypass control valve 14 is controlled so that the temperature of exhaust gas becomes above the natural temperature of minute particle and below the fusing temperature by the temperature sensors 20 and 21 before and behind the collector member 11.</p> |
