摘要 |
An exhaust muffler for a motor vehicle includes a louver tube having an intake end and an exhaust end. An outer tube (20), consisting of a frustoconical portion and a cylindrical portion, is concentrically arranged around the louver tube (30). A plurality of louvers (22) and associated louver holes (23) in the louver tube scoop a portion of gasses from the louver tube into the outer tube. An end cap (50), which includes an exhaust exit hole (32) in its center, fits into an exhaust end of the outer tube. A plurality of end cap holes (34) are arranged so that gasses leaving the outer tube flow through them. A restrictor disk (60) between the end cap and louver tube includes a central hole coaxial with the louver tube and the exhaust exit hole of the end cap. Restrictor disk holes are in the restrictor disk between the central hole and its perimeter so that gasses leaving the louver tube flow through the central hole and the restrictor disk holes as they leave the muffler. A series of inner reverse cones (40) are inside the louver tube upstream of its exhaust end. An exhaust system with this muffler is characterized by moderate backpressure at low rpms and little or negative backpressure at high rpms.
|