The proposed reduction of noise by international legislation will probably result in a limit of 80 dB(A), measured according to ISO R 362. In order to obtain a uniform noise level for all categories of vehicles, the 80 dB(A)-limit is also forecast for heavy trucks in about 5 to 10 years. With a high powered conventional Diesel-engine, this limit can only be reached by complete enclosure of engine and gearbox. In this paper, we present a capsule mounted on the chassis, adapted to the cramped space conditions in a European truck. The design has the advantage of ease of maintenance, since it is possible to attatch the upper capsule parts to the tipping-cab. The results of the noise and temperature measurements are also reported. The great reduction of the surface noise by the capsule requires the installation of a radiator-fan-system, which is designed to reduce noise considerably. (Wassmann)
Concept for a chassis mounted capsule of engine and gearbox for heavy trucks
Das Konzepz einer am Fahrgestell befestigten Kapselung fuer Motor und Getriebe fuer Schwerlastwagen
DIESEL ENGINE NOISE CONF. PROC. SAE-CONF. ; Feb ; 285-293
1979
9 Seiten, 9 Bilder, 6 Quellen
Conference paper
English
Concept for a Chassis Mounted Capsule of Engine and Gearbox for Heavy Trucks
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