Traffic noise in urban areas is posing a serious problem in many countries of the world and reduction of vehicle noise of heavy trucks is now a social problem urgently requiring to be resolved in our country. To cope with the social circumstances, four major heavy truck manufactuters have been conducting a joint research on the reduction of noise heavy trucks under the leadership of the Ministry of International Trade and Industry as a three-year project. Mitsubishi Motors Corporation is in charge of the reduction of exhaust system noise which is one of the main sources of vehicle noise. The exhaust system noise of trucks can be divided into discharge noise emitted from the exhaust outlet and radiated noise emanated from the surface of the exhaust pipes and mufflers. This paper reports on the results of our experiments made on the reduction of the exhaust noise of actual trucks on the basis of the results of our basic studies including acoustic study and studies on air flow noise and radiated noise. (Wassmann)
Reducing exhaust system noise of heavy trucks
Geraeuschverminderung beim Abgassystem von Schwerlastwagen
JSAE Review ; 2 ; 41-52
1980
12 Seiten, 19 Bilder, 4 Tabellen, 3 Quellen
Aufsatz (Zeitschrift)
Englisch
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