Patent ID: 8286421

Claim:
An apparatus for an engine exhaust, comprising: a conduit adapted to be mounted on an exhaust gas pipe, the conduit having a solid walled inlet end section, a solid walled middle section, and a perforated walled outlet end section; a cap mounted to and closing an axial end of the outlet end section of the conduit; and, a diluter mounted at the inlet end of the conduit to draw ambient air into an exhaust gas stream flowing into the conduit at the inlet end section of the conduit; wherein, the solid walled middle section provides a mixer section between the inlet end section and the perforated walled outlet end section to allow ambient air drawn in by the diluter to mix with exhaust gas in the mixer section and wherein the perforated walled outlet end section provides a diffuser to exhaust the mixed ambient air and exhaust gas radially outward of the conduit.