Experimental study of the effect of the properties of motor oils on the vibration and noise levels of internal combustion engines

Abstract

The article discusses the results of an experimental study of the effect of the properties of domestic engine oils with copper-based additives produced by Kupper on the vibration and noise levels of marine propulsion systems using the example of a 3D6 diesel engine. 3D6 diesels are representatives that widely cover both the transport and marine sectors of power plants, which explains their choice as an object of research. Increased noise and vibration levels on ships negatively affect crew members and passengers and lead to fatigue and distraction of the watchmen. The engine oil used was standard MS20 oil, which is used for high-speed marine diesel engines and an innovative oil with copper-based additives. Comparative measurements of vibration and noise were carried out on a Yaroslavets-class vessel using an authorized vibration and noise meter of the first class Ecophysics110A. As a result of the study, it was found that vibrations in the most vibro-active modes of operation of the 3D6 diesel engine are reduced by 30–50 % when using oil with copper-based additives. The use of oil with copper-based additives also has an effect on reducing noise in the engine room, but in the high-frequency spectrum with a frequency of more than 1000 Hz. More effectively, engine oil with copper-based additives affects the reduction of the overall noise level in the wheelhouse of the vessel and as a result, an effect of about 3 dB was achieved, which reduces the effect of noise by 1.4 times in terms of physical perception for humans.