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
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