| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an exhaust emission control device of an internal combustion engine, in which total forced regeneration time for DPF, etc, can be shortened. <P>SOLUTION: The device is provided with an exhaust passage 20 communicating with a cylinder of the internal combustion engine, an NOx occluded catalyst 22 prepared in the exhaust passage, occluding NOx in the exhaust emission at the time of lean operation, discharging and reducing the occluded NOx by rich operation, a filter 23 for collecting particulate matter in the exhaust emission, a filter temperature rise detecting means 40 for detecting the temperature of the filter, and an exhaust emission control means 46 for changing an exhaust emission air-fuel ratio of the internal combustion engine for a rich side and a lean side with a short period when the filter reaches a predetermined temperature by the filter temperature rise detecting means. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
