Up-To-Date Noise Reduction, E.G., on the New Db 190d

Format:

Conference/Event

Author/Creator:

Härting, Härting, author.

Conference Name:

20th FISITA Congress (1984), Vienna, Austria (1984-01-01 : Vienna, Austria)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 1984

Summary:

In Autumn 1983, Daimler-Benz launched the world's firstfully-noise-encapsulated Diesel car, in the form of the 190D.During its development, priority was given not only to compliancewith the stricter legal noise limits which are to be implemented ~the 190D would manage that even without any special features ~ butalso to the desire to make the car noticeably quieter than any ofits rivals, both inside and out, and at any engine speed.The result is a car with body-mounted engine-compartmentencapsulation which completely seals off the engine/gearboxassembly from outside, apart from a few air intake and outletapertures. This cuts down noise emission by about 4-5 dB(A):following the procedures laid down in EEC Directive 81/334, noiselevels of 75/73/71 dB(A) were recorded, depending on the type ofgearbox fitted. Noise emission at tickover is under 50 dB(A) in allcases. The typical knocking noise of a diesel is now scarcelydiscernible. Particular attention was also paid to the increasedweight, higher engine-compartment temperatures, and the cost. Theresultant compromise can be seen ~ or rather, heard ~ to be athoroughly respectable one

Notes:

Vendor supplied data

Publisher Number:

845132

Access Restriction:

Restricted for use by site license