| 摘要 |
<p>PROBLEM TO BE SOLVED: To prevnet occurrence of a burnt residue by correcting the next regeneration start reference value and scavenging fine particles until the reference value reaches higher pressure loss value so that enough fine particles for certainly performing combustion propagation at the time of regeneration can be collected, in case that burnt residual exhaust fine particles are generated in an exhaust fine particles scavenging filter. SOLUTION: This device is so arranged that it is equipped with exhaust fine particles scavenging filters 2011, 2012, exhaust channel change-over valves 1061, 1062 which restrict an exhaust flow to the filters 2011, 2012, and a controller 301 which detects filter regeneration timing on the basis of the pressure loss of the filters 2011, 2012 and also burns exhaust fine particles scavenged in the filters 2011, 2012 by heating the filters 2011, 2012 on the basis of the detected result of the regeneration timing. In this case, this device is so arranged that in the case that burnt residual exhaust fine particles are detected in the filters 2011, 2012 after the filters 2011, 2012 are regenerated, the regeneration is started after a reference value of pressure loss to start the regeneration is corrected and reaches a higher pressure loss value than the previously set reference value, and the regeneration of the filters 2011, 2012 is started after exhaust fine particles are collected to such an extent that combustion propagation can be performed.</p> |
