| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide an exhaust emission control device capable of adequately driving an exhaust throttle valve irrespective of correction to increase a fuel injection amount in accordance with valve closing drive of the exhaust throttle valve when valve opening/closing drive of the exhaust throttle valve is controlled based on the fuel injection amount. <P>SOLUTION: The exhaust emission control device corrects to increase the fuel injection amount in accordance with valve closing drive of the exhaust throttle valve 18 in regenerating a DPF 24. The exhaust throttle valve 18 is driven from a closed state to an open state under a condition that the fuel injection amount becomes not less than a determination value Ph. The exhaust throttle valve 18 is driven from the open state to the closed state under a condition that the fuel injection amount becomes not more than P1 less than the determination value Ph. Then, deviation between the determination value Ph and the determination value P1 is set larger than a correction amount of an increase of the fuel injection amount. <P>COPYRIGHT: (C)2008,JPO&INPIT</p> |
