Patent ID: 6829891
Filing Date: 2004-12-14
Classification: B01D,F01N,F02B,F02D,Y02T

Abstract:
An emission control device that reduces carbon-containing particulates included in a flow of exhaust gas from an internal combustion engine, that comprises a plurality of combustion chambers, an exhaust manifold that unites flows of exhaust gas from said plurality of combustion chambers to at least one joint flow, and an exhaust pipe that leads the joint flow of exhaust gas united by said exhaust manifold to the air, said emission control device comprising:a first heat-resistant filter medium that traps hydrocarbon compounds and the carbon-containing particulates included in the flow of exhaust gas in a dispersive manner to bring the respective particulates and hydrocarbon compounds in contact with oxygen included in the exhaust gas, and thereby makes the trapped hydrocarbon compounds and the trapped carbon-containing particulates subjected to combustion with the exhaust gas having a filter inflow temperature lower than a combustible temperature of the carbon-containing particulates, said first heat-resistant filter medium being disposed in said exhaust manifold, and a second heat-resistant filter medium that traps the remaining carbon-containing particulates, which have not been trapped by said first heat-resistant filter medium but have passed through said first heat-resistant filter medium, said second heat-resistant filter medium being disposed in said exhaust pipe.