INTERNAL COMBUSTION ENGINE EXHAUST MUFFLER Russian patent published in 1997 - IPC

FIELD: transport engineering; engine exhaust systems. SUBSTANCE: muffler has cylindrical housing 1 with end face walls 2 and 3, intake and exhaust branch pipes, 4 and 5, respectively, central perforated pipe 6 connected with branch pipes 4 and 5, cross perforated partition 7 with holes 8 placed between pipe 6 and inner surface of housing 1 and cross plug 9 arranged in pipe 6 in plane of perforated partition 7, and also perforated casing 10 with holes 11. Holes 12 of pipe 6 are arranged over entire length of pipe, and casing 10 encloses pipe 6 over its entire length. Casing is mounted on walls 2 and 3 and partition 7. Holes 11 are made in form of belts whose center, with due account of dynamic increment, is located at a distance equal to half or quarter of length of corresponding chamber 13 or 14. Width of belt does not exceed 0.4d where d is diameter of casing. EFFECT: enlarged operating capabilities. 2 cl, 6 dwg