| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide an apparatus and a method for detecting a particulate matter accumulation amount for an exhaust gas purification filter capable of accurately detecting the particulate matter accumulation amount of the exhaust gas purification filter and accurately determining regeneration timing of DPF. <P>SOLUTION: An upstream-downstream differential pressure of the exhaust gas purification filter preventing particulate matter discharged from an engine from being discharged to atmosphere by filtering the same by substrate wall through which exhaust gas flow is detected, an amount of an incombustible component contained in exhaust gas is estimated, and an accumulation state of the incombustible component on the substrate walls is estimated based on the engine operating state. An amount of the particulate matter accumulated in the exhaust gas purification filter is detected based on the upstream-downstream differential pressure of the exhaust gas purification filter and the accumulation state of the incombustible component on the substrate wall (step S2, S3). <P>COPYRIGHT: (C)2008,JPO&INPIT</p> |
