| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an exhaust emission control device of an internal combustion engine capable of performing function regenerating processing of a particulate filter, without deteriorating exhaust emission. <P>SOLUTION: This exhaust emission control device of the internal combustion engine has a main particulate filter 12 arranged in an exhaust passage 4, a branch passage 8 branching off from the exhaust passage 4 on the downstream side of the main filter 12, a sub-particulate filter 14 arranged in the branch passage 8, and an exhaust control valve 9 switchable to a first position A checking the inflow of exhaust gas to the branch passage 8 and allowing the inflow of the exhaust gas to the exhaust passage on the downstream of a branch party 4a and a second position B checking the inflow of the exhaust gas to the exhaust passage on the downstream of the branch part 4a and allowing the inflow of the exhaust gas to the branch passage 8. An ECU 50 switches the exhaust control valve 9 to the second position, when regenerating PM, when the main filter 12 rises to the temperature for oxidizing and removing particulate matter collected in the filter 12. <P>COPYRIGHT: (C)2008,JPO&INPIT |
