Importance

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Abstract

A sound attenuating engine exhaust system and methods are provided for directing exhaust gases away from an internal combustion engine of a vehicle and attenuating undesirable exhaust sounds during engine operation. The sound attenuating engine exhaust system comprises an exhaust inlet configured to receive exhaust gases from the internal combustion engine. A first resonator coupled with the exhaust inlet is configured to dampen at least one frequency of exhaust sound waves by way of destructive wave interference. The first resonator includes an exhaust outlet for directing the exhaust gases out of the first resonator. A second resonator is coupled with the first resonator and configured to dampen one or more frequencies of exhaust sound waves by way of a combination of destructive wave interference and Helmholtz resonance. Hangers facilitate attaching the sound attenuating engine exhaust system to an undercarriage of the vehicle.

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First Claim