Patent ID: 7549511

Claim:
An exhaust sound and emission control system, comprising: an elongate housing having a first end, a second end opposite the first end, and a major axis; a first end cover and a second end cover secured to and sealing the first end and the second end of the housing, respectively, the covers and the housing defining an interior volume therebetween; a first end pipe and a second end pipe, respectively penetrating and extending from the first end cover and from the second end cover and communicating with the interior volume; a first separator plate disposed within the housing parallel to the major axis thereof, the first separator plate having a first end and a second end opposite the first end; a second separator plate disposed within the housing parallel to and spaced apart from the first separator plate, the second separator plate having a first end and a second end opposite the first end; a substantially rhomboid flow divider disposed between the first separator plate and the second separator plate, wherein the flow divider, the first separator plate, and the second separator plate define mutually separate first and second primary gas flow paths through the housing; a first arcuate flow guide extending from the first end of the first separator plate, the first arcuate flow guide having a radius of curvature originating from the second end of the second separator plate; and a second arcuate flow guide extending from the first end of the second separator plate, the second arcuate flow guide having a radius of curvature originating from the second end of the first separator plate, the first separator plate, first arcuate flow guide, second separator plate, and second arcuate flow guide defining a sinusoidal exhaust gas path within the housing.