Patent ID: 6810660
Filing Date: 2004-11-02
Classification: B01D,F01N,Y10S

Abstract:
An exhaust aftertreatment system for an internal combustion engine having at least one cylinder and a catalytic converter disposed in an exhaust duct of the engine which receives an exhaust gas stream from the engine, comprising: a trap disposed in the exhaust duct located upstream or the catalytic converter, said trap is comprised of channels through which the exhaust gas stream flows, said channels being irregular in cross-section wherein a trajectory of a centerline of said channels is random from an upstream face of said trap to a downstream face or said trap and a total volume of said channels comprises more than 90% of the total volume of said trap wherein the engine has one or more pistons reciprocating within one or more cylinders, said porous material has a mass, in grams, which is less than a displacement, in cubic centimeters, of the cylinders coupled to said phosphorus trap divided by 25.