| 摘要 |
<P>PROBLEM TO BE SOLVED: To effectively prevent the occurrence of partial rapid combustion in a particulate filter (DPF) 32 to collect exhaust gas particle (project manager) 32. <P>SOLUTION: In an ECU51, a present accumulation amount of exhaust gas particles based on the operation state of an internal combustion engine, such as the differential pressure of a DPF32, is computed. When the present accumulation amount exceeds a preset upper limit value, in addition to control through which forced regeneration to regenerate DPF32 by forcibly burning and removing accumulation exhaust gas particles is allowed, if as a result of the temperature of exhaust gas in the DPF32 being compared with a reference temperature, it exceeds the reference temperature, it is decided that it is during natural regeneration and thereafter it is decided that it is not during natural regeneration, and when an accumulation amount of the exhaust particles is reduced to a value lower than a lower limit value, control through which forced regeneration is executed and completed is added. Since this constitution enables approximate complete removal of accumulation exhaust gas particles, it is dissolved before dispersion of accumulation in the DPF32 becomes excessive, and it can be avoided that rapid combustion occurs at a superfluous accumulation part in the DPF32. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
