| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide an exhaust emission control system and a method for controlling the exhaust emission control system capable of accurately estimating PM deposition quantity during deposition of PM and during regeneration control and preventing damage of a filter caused by restriction of fuel consumption quantity for DPF regeneration and over deposition of PM in the exhaust emission control system provided with DPF. <P>SOLUTION: Differential pressure increase velocity Vpi is calculated by multiplying deposition quantity increase velocity Vai calculated based on engine operation states Ne, Q by a first coefficient K1. Deposition quantity reduction velocity Vad is calculated by multiplying differential pressure decrease velocity Vpd calculated based on filter temperature index temperature Ti by a second coefficient K2. Differential pressure estimation valueΔPe is calculated by integrating difference between the differential pressure increase velocity Vpi and the differential pressure decrease velocity Vpd. Deposition estimation quantity Ae is calculated by integrating difference between the deposition quantity increase velocity Vai and the deposition quantity decrease velocity Vad. <P>COPYRIGHT: (C)2009,JPO&INPIT</p> |
