| 摘要 |
The present invention relates to a method for determination of a cleaning need relating to a particulate filter (265) in the exhaust treatment system of an engine (231), from the point of view of ash occurrence, comprising the steps to: - determine a measure of accumulated ash occurrence in said particulate filter (265), and - determine (s340) said measure based on a determined heat capacity (C1; C2) of said particulate filter (265) in at least two different states, relating to accumulated ash occurrence. |
