NOISE EMISSION OF AIR-COOLED AUTOMOTIVE DIESEL ENGINES AND TRUCKS

Examples of the development of two engine series of KHD company are given to illustrate the noise improvements achieved in the past. Moreover, the present development work for further noise reduction is reported.

Of special importance is an adequate combination of the various noise reduction measures to achieve low noise levels in acceleration tests of vehicles. In this connection, emphasis is given to measures on the combustion system, cooling blower, measures for the reduction of engine sound radiation and measures on the truck.