Patent ID: 7793494

Claim:
A static mixer for an exhaust system of an internal combustion engine, comprising: a wall structure arranged across the direction of flow in a pipe; a plurality of layers of a corrugated sheeting material situated one above the other in said wall structure; wherein said plurality of layers form a plurality of cells through which cells an exhaust flow passes; and a plurality of baffles arranged along the sheeting material and comprising baffle pairs, each baffle pair comprising a first and a second baffle, wherein for each said baffle pair, the first baffle is arranged at a distance of one half-wavelength relative to the second baffle, and wherein the second baffle of a first baffle pair is arranged at a distance of three half-wavelengths from the first baffle of a second baffle pair, and wherein at least one of said plurality of baffles is associated with at least one of said plurality of the cells, said at least one baffle being arranged on at least a first of said plurality of layers of sheeting material in such a way that it is arranged on the outgoing flow side of said cells and extends across the direction of flow.