| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an exhaust emission control device for an internal combustion engine, having a particulate filter arranged downstream of a NOx storage reduction catalyst device and an S trap device arranged upstream of the NOx storage reduction catalyst device, which prevents discharge of SOx from the S trap device when burning in the NOx storage reduction catalyst device a part of additional fuel supplied into an exhaust system upstream of the S trap device or into a cylinder to raise the temperature of exhaust gas flowing into the particulate filter to thereby achieve favorable regeneration of the particulate filter. <P>SOLUTION: Additional fuel supplied from a first fuel supply means 7 is controlled to be such an amount that the S trap device 4 does not discharge SOx. The exhaust system between the NOx storage reduction catalyst device 5 and the particulate filter 6 is equipped with a second fuel supply means 8 to supplement the shortage of additional fuel supplied by the first fuel supply means, required for regeneration. <P>COPYRIGHT: (C)2009,JPO&INPIT |
