| 摘要 |
<p>PURPOSE:To provide an exhaust emission control device which can satisfactorily regenerate a filter without using a constant voltage power supply. CONSTITUTION:A voltage applied to electrically heating means 11 is detected, and the duty-rate of current carried to the electrically heating means 11 is controlled in accordance with thus detected voltage so that the power for carrying current to the electrically heating means 11 is set to a predetermined desired power value. Thus, variation in the heating value of the electrically heating means 11, a caused by variation in source voltage, can be prevented without using a constant voltage power supply. Thus, a filter 2 is satisfactorily regenerated, and the weight and necessary space of the device is prevented from increasing, thereby it is possible to provide an exhaust emission control device which can save power consumption.</p> |
