Patent ID: 8956040
Filing Date: 2015-02-17
Classification: B01F,F01N,Y10T

Abstract:
1. An exhaust system for the treatment of exhaust gases of internal combustion engines comprising a duct housing a static mixer for the treatment of the exhaust gases, comprising an annular support portion and a plurality of substantially coplanar radial vanes that are arranged radially with their rear portion or base associated with said support portion and the front portion or radial tip converging towards the centre of the mixer, wherein the vanes comprise at least three lines of bending, which define respective portions arranged on non parallel planes and defining corresponding impact surfaces for the exhaust gases, wherein said impact surfaces for the exhaust gases lie on non-parallel planes with respect to a transversal plane of the mixer and are thus non-perpendicular to the flow direction of the exhaust gases passing through the mixer, wherein a first impact surface adjacent to the base of the vane is inclined of an angle comprised between 30° and 60° with respect to the middle transversal plane of the mixer, wherein a second impact surface adjacent to the first impact surface is inclined of an angle comprised between 40° and 70° with respect to the first impact surface, and wherein a third impact surface adjacent to the second impact surface is inclined of an angle comprised between 20° and 50° with respect to the second impact surface.