Patent ID: 6213251
Filing Date: 2001-04-10
Classification: F01N

Abstract:
An exhaust muffler for a motor vehicle, comprising:a) a louver tube having an intake end and an exhaust end;b) an outer tube concentrically arranged around said louver tube, said outer tube including a frustoconical portion and a cylindrical portion, said frustoconical portion connecting to said louver tube at said intake end such that a smallest cross-sectional area of said frustoconical portion is adjacent said intake end and a largest cross-sectional area of said frustoconical portion is adjacent said cylindrical portion;c) a plurality of louvers and associated louver holes in said louver tube whereby a portion of gasses entering said louver tube are scooped into said outer tube by said louvers through said louver holes; andd) an end cap fitting into an exhaust end of said outer tube; said end cap havingi) an exhaust exit hole in a center therein whereby gasses leaving said exhaust end of said louver tube flow through said exhaust exit hole, andii) at least one end cap hole therein whereby gasses leaving said outer tube flow through said at least one end cap hole,wherein an exhaust flow from said vehicle is separated into first and second portions at an entry point of said muffler, and said first and second portions of said exhaust flow are combined downstream in said muffler.