| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To suppress the irregular combustion of accumulated exhaust particulates during regenerating a particulate filter (DPF). <P>SOLUTION: This exhaust emission control device for an internal combustion engine comprises a flow distribution control means 8 provided right therenear ranging to the DPF 5 for controlling the flow distribution of exhaust gas in a cross section so that the flow amount of the exhaust gas is increased at a position in the cross section of the DPF 5 where the combustion speed of the accumulated exhaust particulates gets low. Thus, the distribution of the supply amount of oxygen is controlled corresponding to the flow distribution. At the position in the cross section of the DPF 5 where the supply amount of oxygen is increased, the combustion of the accumulated exhaust particulates is accelerated, accordingly. As a result, by increasing the flow amount of exhaust gas at a position where the catalyst temperature of the DPF 5 is low to give a tendency to slowing combustion, e.g. the tendency to slowing the combustion is offset to reduce the irregular combustion in the cross section of the DPF 5. <P>COPYRIGHT: (C)2005,JPO&NCIPI</p> |
