| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a DPF regeneration timing determination method and device, which accurately determines a DPF regeneration timing by accurately estimating a PM amount and a SOOT deposition amount of an important element to determine the DPF regeneration timing. <P>SOLUTION: The DPF regeneration timing determination device is provided with a DPF for collecting a PM, in an exhaust passage of an internal combustion engine, and determines the regeneration timing for burning and removing the PM deposited on the DPF, and also is provided with: a SOF exhaust amount map 23, a SOOT exhaust amount map 25; a SOF regeneration amount map 27; a SOOT regeneration amount map 29; and a SOF deposition amount correction means for calculating a SOF content and SOOT content deposited on the DPF from a difference between the discharge amount and regeneration amount of the SOF content and SOOT content calculated from each map, and for correcting a volatilization or oxidative combustion content of the SOF content with the delay of time by a temperature history of the DPF during engine operation, or an oxidative combustion content in the DOC. <P>COPYRIGHT: (C)2010,JPO&INPIT |
