| 摘要 |
<p>PROBLEM TO BE SOLVED: To prevent the burning out of a solenoid valve by conducting electricity into the solenoid valve from a battery mounted on a vehicle during a regeneration period only to open the valve, conducting electricity to an electrical heating means and an air supply means, and supplying air for regeneration which is heated to a filter to burn collected particulates for the regeneration of the filter. SOLUTION: Exhaust gas which is exhausted from a diesel engine 100 is introduced into a filter storage case 1, particulates in the exhaust gas are caught by a filter 2, and the purified exhaust gas is exhausted from a tail pipe 105. To regenerate the filter 2, a switch 14 is turned on while an engine is stopped, and a controller 9 finds a duty ratio of a solenoid valve 5 based on battery voltage at the time to PWM-control the solenoid valve 5 based on the duty ratio. Consequently, the solenoid valve 5 is smoothly opened irrespective of fluctuation of battery voltage. Moreover, hot air is generated by conducting electricity to a heater 3 and a motor M to burn the particulates for the regeneration of the filter 2.</p> |
