| 摘要 |
PURPOSE:To remove fine particles capture by trappers by combusting the same, by communicating two trappers to a fuel supply port selectively by means of a selector valve, and thereby supplying auxiliary fuel selectively to the two trappers. CONSTITUTION:Exhaust gas is introduced into a trapper container 10 from the direction shown by an arrow A in the drawing and discharged to the outside from the other end of the container 10. The container 10 is divided into two separate chambers by a partition wall 12. In these two chambers, there are placed trappers 14a, 14b made of foamed ceramic material. On the upstream side of these trappers 14a, 14b, there is provided a selector valve 16 for selecting the exhaust-gas flow to the trappers. Further, adjacently of the trappers 14a, 14b on the upstream side thereof, there are provided heaters 25 for heating fine particles captures by the trappers. A fuel supply port 26 opened in the container 10 is connected to a fuel injection valve 30. A fuel supply pipe 32a is disposed at one side of the selector valve 16 and another fuel sypply pipe 32b is disposed at the other side of the valve 16 for supplying fuel selectively to the trapper 14a or 14b. |
