Patent ID: 6568178
Filing Date: 2003-05-27
Classification: B01D,F01N,F02B,F02F,F02M,Y02T

Abstract:
A device for purifying the exhaust gas of an internal combustion engine comprising:a particulate filter arranged in the exhaust system on which the trapped particulates are oxidized, reversing means for reversing the exhaust gas upstream side and the exhaust gas downstream side of said particulate filter, and improving means for improving the amount of particulates that can be oxidized and removed on said particulate filter, wherein said particulate filter has a trapping wall, said trapping wall has a first trapping surface and a second trapping surface, said reversing means reverses the exhaust gas upstream side and the exhaust gas downstream side of said particulate filter so that said first trapping surface and said second trapping surface are used alternately to trap the particulates, wherein said particulate filter carries an active-oxygen releasing agent on said first and second trapping surfaces, and active-oxygen released from said active-oxygen releasing agent oxidizes the trapped particulates on said particulate filter.