Patent ID: 8080208
Filing Date: 2011-12-20
Classification: B01D,B01J,F01N,Y02A,Y02T

Abstract:
1. An exhaust gas purification device that includes a catalytic particulate filter, in which a plurality of channels are formed in a flow direction of exhaust gas, an inlet of at least one channel among the channels is open and an outlet thereof is closed, an inlet of at least another one channel among the channels is closed and an outlet thereof is open, and the closed portions are alternatively disposed, the exhaust gas purification device comprising: a first coating layer containing a catalyst formed on an interior surface of the at least one channel in a direction from the inlet to the outlet of the at least one channel as long as a predetermined first length; and a second coating layer containing the catalyst formed on an exterior surface of the at least one channel in a direction from the outlet to the inlet of the at least one channel as long as a predetermined second length, wherein the catalyst of the first and second coating layer is not coated on an interior surface of a downstream side of the at least one channel; wherein the outlet of the at least one channel is closed by a plug; wherein a third coating layer containing the catalyst is formed on an outside surface of the plug; and wherein the third coating layer is connected to the second coating layer.