초록 ▼

An exhaust silencer for internal combustion engines, particularly as used on motor vehicles including tractors. A front pipe, a plurality of core tubes and a tail pipe have successive inner flow channels of equal section areas. The plurality of core tubes are integrally connected to the larger end o

An exhaust silencer for internal combustion engines, particularly as used on motor vehicles including tractors. A front pipe, a plurality of core tubes and a tail pipe have successive inner flow channels of equal section areas. The plurality of core tubes are integrally connected to the larger end of a trumpet pipe. The walls of the core tubes are punched with flanged holes forming converging passages. Flow-dividing plates are provided in the tail pipe. The exhaust flow divides into smaller substreams on passing through the front pipe and the core tubes, thus raising the ratio of expansion, leading to a decrease in noise level and exhaust back pressure, while reducing engine output loss. The noise level of a vehicle can be reduced to 80-83 dB(A), while oil consumption is reduced by 6-8.8%.

대표청구항 ▼

An exhaust silencer for an internal combustion engine having an exhaust pipe, comprising: a cylindrical shell, said shell having first and second ends, an inner space therebetween and a longitudinal axis; first and second lids disposed at said first and second ends, respectively, closing said cylind

An exhaust silencer for an internal combustion engine having an exhaust pipe, comprising: a cylindrical shell, said shell having first and second ends, an inner space therebetween and a longitudinal axis; first and second lids disposed at said first and second ends, respectively, closing said cylindrical shell; at least one substantially circular spacer dividing said inner space into a plurality of chambers, said chambers having different volumes, said spacer having a plurality of substantially circular openings therein uniformly and circumferentially disposed within said spacer; front and tail pipes, said tail pipe having a front end including a geometric center and further having an outlet edge having an approximately sinewave profile; a trumpet pipe having large and small ends, said large end having a geometric center, said front pipe being coupled to said trumpet pipe small end, and said trumpet pipe large end being coupled to said first lid; said first and second lids each having an aperture for fitting therein said trumpet pipe large end and tail pipe, respectively, said apertures further having geometric centers, said geometric centers being aligned with said longitudinal axis; a plurality of core tubes extending through said substantially circular openings in said spacer, said core tubes including first and second ends, said ends having cross sections substantially defining a sector of a circle, said core tubes having walls with holes therein coupling the interior volume of said core tubes to said chambers, said core tube holes having flanges; said core tubes each including a portion parallel to said longitudinal axis and first and second portions deflecting at first and second angles toward the centers of the large end of said trumpet pipe and the front end of said tail pipe, respectively, said first ends of said core tubes being assembled together and inserted into said trumpet pipe large end to form an integral connection therewith; and flow dividing plates disposed in said tail pipe.