Authors: E.A. Ermilov, B.I. Kovalsky, V.Z. Oleinik, N.S. Batov

Title of the article: Method for controlling the thermal oxidation stability of motor oils

Year: 2017, Issue: 4, Pages: 130-134

Branch of knowledge: Mechanical engineering and machine science

Index UDK: 621.892.8-721

DOI: 10.26730/1999-4125-2017-4-130-134

Abstract: During operation of an internal combustion engine, the processes of oxidation, temperature destruction and chemical reactions of metals with their products and additives proceed simultaneously on friction surfaces. However, the dominant influence of one of the processes on the physical, chemical and anti-wear properties of oils has not been adequately studied. Therefore, the purpose of the present study is to find a new criterion that takes into account the optical properties of thermostatically controlled oil, viscosity index and anti-wear properties. The experimental results of the study of the empirical criterion of the thermal oxidation stability of motor oils with various bases, determined by the ratio of the product of optical density and the decimal logarithm of the viscosity index to the arithmetic mean value of the wear spot diameter, are presented. It has been established that the base of motor oils and the test temperature have a different effect on the empirical criterion of thermal oxidation stability.

Key words: thermal oxidation stability optical density viscosity index wear parameter test temperature

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