| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a technique preventing fuel economy from lowering, by reducing opportunities executing a forced regeneration control of a filter as far as possible, in an exhaust emission control device for an internal combustion engine. <P>SOLUTION: The exhaust emission control device for an internal combustion engine comprises: an exhaust passage discharging exhaust from the internal combustion engine; a DPF disposed to the exhaust passage to carry a catalyst with oxidation function and capturing PM in the exhaust; and an exhaust pulsation control means increasing a reciprocation amount of exhaust by exhaust pulsation at an arrangement position of the DPF when oxidation and removal of the PM captured in the DPF are promoted, and decreasing the exhaust pulsation itself near the arrangement position of the DPF when an deposition amount of the PM captured in the DPF is detected. <P>COPYRIGHT: (C)2009,JPO&INPIT |
