Acoustics – Sound-modifying means – Muffler – fluid conducting type
Patent
1987-11-25
1991-10-01
Adams, Russell E.
Acoustics
Sound-modifying means
Muffler, fluid conducting type
181252, 181272, F01N 716, F01N 110, F01N 108
Patent
active
050525131
ABSTRACT:
In order to accomplish the aforementioned and other objects, a resin muffler, according to the invention, is formed of a heat-resistantive synthetic resin having a property of visco-elastic plasticity in a predetermined temperature range. In the visco-elastic temperature range, the motion of the molecular chain segment of the material resin comes to be relaxed to exhibit noise creative pulsating energy dissipation owing to emission as heat energy. Since the resin muffler thus absorbs noise creative energy by dissipation at around the visco-elastic temperature range and transform the energy into the heat energy which may be emitted by radiation.
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Yoshikawa et al., "A study on the Muffling Method Using New Materials", SAE Technical Paper, Series, Sep. 11-13, 1989, pp. 51-55.
Yoshikawa et al., "Noise Reduction in Exhaust Piping System by use of Heat-Resistant Epoxide Muffler", Oct. 19-22, 1987 pp. 1-14, SAE Technical Paper Series.
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Awaji Yoshiharu
Ikeda Takashi
Mitsuno Shunsaku
Shimada Masami
Takeuchi Katsuyoshi
Adams Russell E.
Kananen Ronald P.
Noh Jae N.
Showa Denko Kabushiki Kaisha
Yamato Kogyo Company, Limited
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