Patent ID: 6609590
Filing Date: 2003-08-26
Classification: F01N,Y02T

Abstract:
An in-line sound attenuating exhaust system for use in combination with an internal combustion engine, said sound attenuating exhaust system comprising:(a) an exhaust pipe having first and second ends, and a length between the first and second ends, an inner surface, a gas flow channel defined at and inwardly of the inner surface, and a longitudinal axis; (b) a sound-attenuating baffle comprising at least two and up to about six baffle plates, connected to each other, including a leading baffle plate first encountered by exhaust gas received from such internal combustion engine, and a trailing baffle plate last encountered by exhaust gas received from such internal combustion engine, said baffle plates extending transversely across the gas flow channel transverse to the longitudinal axis, each said baffle plate having a perimeter wall, an exhaust receiving surface, an exhaust discharging surface, and an array of apertures extending between the exhaust receiving surface and the exhaust discharging surface; and (c) first and second ones of said baffle plates defining, in edge view, respective plate angles with respect to the longitudinal axis, the magnitude of the first plate angle with respect to the longitudinal axis being different from the magnitude of the second plate angle with respect to the longitudinal axis.