2003•Journal of Jilin University of TechnologyRequires access

Noise Source Identification of CA498 Diesel Engine and Its Noise Suppression Measures

Xiao Lu

Abstract

Based on fundamentals of sound intensity measurement,surface noise sources radiating from CA498 diesel engine have been identified by means of pulse 2000 multifunctional vibration and noise measuring system.Sound intensity isograms were plotted with the aid of MATLAB 2D drawing software.Main noise sources were located and arranged in order of magnitude.After coating the major noise sources intake manifold,cylinder head cover and oil pan by high polymer,engine noise was reduced significantly.Sound power level is reduced by 2dB(A),all sound pressure levels are also more or less reduced.

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Key concepts: Sound intensity, Acoustics, Noise (video), Sound power, Ambient noise level, Noise measurement, Diesel engine, Sound pressure