Abstract
The investigation presented in the paper deals with the origins of noise of the two major components of the diesel injection equipment, namely the injection pump and “injectors”. It is shown that injection equipment noise is considerably augmented by the mounting system and thus the characteristics of the engine structure become important factors which determine the level and the character of the noise emitted. About 20 dB reduction of injection pump noise and some 25 dB reduction of injector noise has been made possible by relevant design changes of the components themselves, by their mounting arrangements and by the design of the engine structure. The relation between diesel engine and fuel injection equipment noise is considered over the whole range of operating conditions.
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