| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a technology for efficiently performing PM (particulate matter) forced regeneration in an exhaust emission control device for an internal combustion engine provided with a particulate filter. <P>SOLUTION: The frequency of the intake air quantity becoming less than the predetermined quantity is determined from operation history before PM forced regeneration is carried out. When the frequency is high, a target filter temperature during PM forced regeneration is set low so that PM forced regeneration can be continued even when the intake air quantity is less than the predetermined quantity. When the frequency is low, the target filter temperature during PM forced regeneration is set high to shorten the time required for the PM forced regeneration. <P>COPYRIGHT: (C)2006,JPO&NCIPI</p> |
