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Study of Sound Isolation Structure for Engine Generators

Article of Honda R&D Technical Review Vol.15 No.2


In a development of sound isolation type generators, three-division case object structure that has divided two cool zones and one hot zone was newly studied. This study was aimed at establishment of compatibility at high level between sound isolation and cooling capabilities that are in a trade-off relationship. Sound isolation of 12.1dB(A) was achieved according to this structure, securing the equivalent level of cooling capabilities to that of open frame type generators. As a result of adopting the new structure to the generators for domestic consumption for India, the Indian noise regulation phase II has been accomplished for the first time in the entire world.


(1) Tanaka, Y., Kawauchi, T., Ito, K., Nakamura, M.: Development of the Light-weight and Compact Portable Generator - GENE21 Series, HONDA R&D Technical Review, Vol. 11, No. 2, p. 15-22 (1999)
(2) Department of Environment and Disaster Services, Environmental Policy Division, Saitama Prefectural Government: 1999 White Paper on the Environment in Saitama, Saitama, p. 103-114 (1999)
(3) The Japan Society of Mechanical Engineers: Mechanical Noise Handbook, Tokyo, Sangyo Tosho, p. 29-30 (1991)
(4) Kitamura, K., Otake, K.: Fundamental Heat Transfer Engineering, Tokyo, Kyoritsu Shuppan, p. 12-29 (1991)

Author (organization or company)

Toru FUKUDA(Asakahigashi R&D Center)、Katsumi MARUYAMA(Asakahigashi R&D Center)、Kazuhito TAKEMURA(Asakahigashi R&D Center)、Shinichi SUZUKI(Asakahigashi R&D Center)

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