Device for purifying the exhaust gas of an internal combustion engine

摘要

A device for purifying the exhaust gas of an internal combustion engine using a particulate filter arranged in the exhaust system. The trapped particulates are oxidized on the particulate filter, and the particulate filter has a trapping wall for trapping the particulates. The trapping wall has a first trapping surface and a second trapping surface. The device reverses the exhaust gas upstream side and the exhaust gas downstream side of the particulate filter so that the first trapping surface and the second trapping surface are used alternately to trap the particulates.