Muffler

A muffler for reducing the sounds of combustion gases exhausted from an internal combustion engine, said muffler comprising:

• an elongated fluid passage extending between a muffler inlet and a muffler outlet such that said muffler outlet is in fluid communication with said inlet, said muffler inlet being connectable with gases exhausted from an associated engine and said outlet being connectable with the atmosphere, said passage extending about a passage axis and said axis defining a central plane dividing said passage into a first side region and a second side region on either side of said plane and circumferentially spaced from one another;
• said muffler further including an inner sound vessel, said inner sound vessel having a generally rectangular cross-sectional configuration extending along said axis and having a height and a width wherein said height is defined by side panels generally parallel to said central plane, said inner vessel housing a sound attenuation chamber adjacent said first region in fluid communication with said elongated passage for receiving an associated pressure wave from an associated flow of exhaust gasses, said sound chamber having a flow path with a set length based on the frequency of the associated sound pulse, said flow path being limited to only one side of said central plane.

A muffler for reducing the sounds of combustion gases exhausted from an internal combustion engine, said muffler comprising:

• an elongated fluid passage extending between a muffler inlet and a muffler outlet such that said muffler outlet is in fluid communication with said inlet, said muffler inlet being connectable with gases exhausted from an associated engine and said outlet being connectable with the atmosphere, said passage extending about a passage axis and said axis defining a central plane dividing said passage into a first side region and a second side region on either side of said plane and circumferentially spaced from one another;
• said muffler further including an inner sound vessel housing a sound attenuation chamber adjacent said first region in fluid communication with said elongated passage for receiving an associated pressure wave from an associated flow of exhaust gasses, said sound chamber having a flow path extending on one side of said central plane with a set length based on the frequency of the associated sound pulse, said muffler further including an outer sound vessel encapsulating said inner sound vessel, said outer sound vessel being in fluid communication with said elongated fluid passage between said inlet and said outlet.