| 摘要 |
<p>PURPOSE: To accurately judge reproduction start timing by providing a control means determining exhaust flow from a suction flow sensor, an exhaust temperature sensor, and an exhaust pressure sensor, and operating a particulate trap reproducing means with a control means. CONSTITUTION: A first trap 10A is constituted of a particulate filter 1A stored in a casing 2A and captures particulates in exhaust gas, an electric heater 6A heating the filter 1A to burn the captured particulates, and a heat reflector 11A. An ECU 14 is constituted of a micro-computer, it determines exhaust flow based on information of suction flow from an air flow sensor 32, an exhaust temperature from a temperature sensor, and an exhaust pressure from a pressure sensor, and it controls a switching valves 18, 19 of electric heaters 6A, 6B and an opening/closing valve 9 based on the exhaust flow and pressure loss of the first trap 10A. Reproduction start timing can be accurately judged.</p> |
