| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a regeneration control method of an exhaust emission control system capable of efficiently regenerating a filter while preventing melting of the filter in a short time by timely starting supply of oxygen when a filter temperature becomes a proper temperature by optimizing preliminarily heating time at filter regenerating of the exhaust emission control system. SOLUTION: In this regeneration control method of the exhaust emission control system 1 for scavenging PM while switching a filter 20 for scavenging the PM in exhaust gas and a regenerating filter 20, when preliminary heating time t1 of preliminary heating performed before starting the supply of the oxygen for PM combustion to the regenerating filter 20 exceeds a prescribed time determining value t10, the supply of the oxygen is started, and the prescribed time determining value t10 is changed by an exhaust temperature T1 of a filter inlet at regeneration starting time or after starting regeneration.</p> |
