Patent ID: 6990804
Filing Date: 2006-01-31
Classification: B01D,F01N,Y02A

Abstract:
1. A combination exhaust gas post treatment/muffler device in the exhaust gas section of an internal combustion engine, comprising: a muffler that is spatially delimited by a front end wall, a rear end wall, and a peripheral outer wall, wherein said muffler is provided with an inlet tube for receiving exhaust gas that is to undergo post treatment; at least one preliminary oxidation catalytic converter that is disposed in an interior of said muffler and significantly increases an amount of NO at least one particle separator disposed in said interior of said muffler, wherein after flowing through said at least one preliminary oxidation catalytic converter and said at least one particle separator, exhaust gas, in a clean and indirectly muffled state, is adapted to be conveyed out of said muffler; wherein a free exhaust gas inlet surface of said at least one catalytic converter is considerably smaller than a free exhaust gas inlet surface of said at least one particle separator; wherein an aspect ratio AR=I/Ø wherein an aspect ratio AR=I/Ø wherein a volume of said at least one preliminary oxidation catalytic converter is between approximately 2.5 and 4 liters, wherein a volume of said at least one particle separator is between approximately 5.5 and 22 liters, and wherein a ratio of the volume of said at least one catalytic converter to the volume of said at least one particle separator is between approximately 0.15 and 0.55; wherein a ratio of the aspect ratio of said at least one particle separator wherein at a maximum exhaust gas volume of flow (Nm