| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To execute the regeneration process of DPF (Diesel Particulate Filter) while avoiding the problem of shortage of air flow to an engine due to the excessive closure of an intake air throttle valve, and securing the stable operation of the engine during DPF regeneration control by securing irreducible minimum air flow when the inlet exhaust gas temperature of an exhaust gas after-treatment device provided with DPF is controlled and raised with an intake air throttle valve during DPF regeneration. <P>SOLUTION: The DPF regeneration control device includes an intake throttle valve opening command value selection means 35 selecting a larger one out of opening command vale from an exhaust gas temperature control means 31 outputting the opening command value of an intake throttle valve 5 to maintain the temperature of exhaust gas flowing in the after-treatment device during the regeneration of DPF at target exhaust gas temperature necessary for burning and removing PM, and an opening command value from an intake air quantity control means 33 outputting the opening command value of the intake throttle valve 5 to maintain a target intake air quantity irreducible minimum for operation without misfire. The device executes control based on the larger intake throttle valve opening command value. <P>COPYRIGHT: (C)2010,JPO&INPIT</p> |
