A 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 comprises particulate trapping means which have many trap passages for allowing a large amount of exhaust gas to pass therethrough and communicating means which have many communicating passages for allowing a large amount of exhaust gas to pass therethrough. In the device, each trap passage of the particulate trapping means has a trap wall, which extends longitudinally and through which the exhaust gas passes, as at least one of side walls thereof. The particulate trapping means and the communicating means are arranged in a row in the exhaust passage of the engine. The passage resistance of each communicating passage is higher than that of each trap passage.