| 摘要 |
<P>PROBLEM TO BE SOLVED: To avoid such a situation that a reducing agent flows into an intake passage without limiting the addition time of the reducing agent and the operation time of an LPL (low pressure loop)-EGR system and to gain a distance from a reducing agent addition valve to a selective reduction catalyst in an exhaust emission control device for an internal combustion engine including the LPL-EGR system and an SCR system. <P>SOLUTION: The exhaust emission control device for the internal combustion engine includes a bypass passage that reaches an EGR passage from an exhaust passage upstream of the reducing agent addition valve, and a passage selector valve disposed at a connection part between the bypass passage and the EGR passage to make one of a first EGR passage which is the EGR passage upstream of the connection part, and a second EGR passage which is the EGR passage downstream of the connection part, conductive to the bypass passage. <P>COPYRIGHT: (C)2013,JPO&INPIT |
