| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To achieve both stability and responsiveness by controlling temperature by feedback by using an optimum F/B gain according to the present operating state in temperature control during the regeneration of a DPF. <P>SOLUTION: When the deposition amount of PM on the DPF exceeds a prescribed value, a basic post-injection amount QPBSE by a temperature raising means is calculated, and based on a temperature correction value calculated by multiplying a feedback gain by a deviation between the upstream exhaust gas temperature THIN and the target temperature THTRG of the DPF, and the temperature correction amount in the past, a temperature correction is performed to calculate a final post-injection amount QPFIN. Since the feedback gain is switched based on an intake amount detected by an air flow meter and according to the magnitude of a time delay in the variation of exhaust gas temperature in the present operating condition, the responsiveness is increased while maintaining the stability. <P>COPYRIGHT: (C)2006,JPO&NCIPI</p> |
