| 摘要 |
<P>PROBLEM TO BE SOLVED: To improve safety and prevent deterioration of fuel economy by accurately estimating SOF accumulation quantity and SOOT accumulation quantity and performing regeneration at appropriate timing. <P>SOLUTION: DPF 3 is installed in an exhaust gas passage 2 of a diesel engine 1 to collect exhaust particulate. Accumulation quantity of SOF which is organic solvent soluble composition and accumulation quantity of SOOT which is solid carbon composition out of exhaust particulate composition accumulated on the DPF 3 are estimated respectively. When accumulation quantity of SOF reaches SOF removal execution accumulation quantity M1, temperature of the DPF 3 is raised to relatively low SOF combustion temperature or higher, when accumulation quantity of SOOT reaches SOOT removal execution accumulation quantity M2, temperature of the DPF 3 is raised to relatively high SOOT combustion temperature or higher, to execute SOF removal process. Rapid combustion of SOOT caused by SOF combustion can be prevented by executing removal process before SOF gets excessive. <P>COPYRIGHT: (C)2007,JPO&INPIT |
