| 摘要 |
<p>PURPOSE:To enable proper administration of the flow rate of exhaust gas supplied to a filter at the time of regeneration, and certain regeneration thereof to be carriod out by using a cheap valve. CONSTITUTION:When it is judged right now a regeneration timing a first branch passage 13 is closed by a valve 81, a first filter 51 is communicated with a bypass passage 70, and electrification to a heater 41 is started so as to start regenerating operation. When a second filter 52 is regenerated, after a prescribed time passes, the valve 81 is opened, a second branch passage 15 is closed by a valve 85, and a third filter 55 is communicated with the bypass passage 70 so as to regenerate the third filter 55.</p> |
