| 摘要 |
FIELD: mechanical engineering; internal combustion engines. ^ SUBSTANCE: proposed muffler has intake and exhaust pipes and housing made of sheet material provided with cavities and turned into spiral. Heat-resistant porous noise-absorbing material covers housing sheet surface from side of cavities. Said cavities and porous noise-absorbing material form closed spaces effectively absorbing sound energy. Closed spaces are formed also in blind end faces of intake and exhaust pipes. ^ EFFECT: improved efficiency of noise damping. ^ 4 dwg |
