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Comparison Method of Engine Oils on Thermooxidizing Stability Indicators

  • A. N. Sokolnikov
  • O. N. Petrov
  • V. I. Vereshchagin
Conference paper
Part of the Lecture Notes in Mechanical Engineering book series (LNME)

Abstract

The results of a research of thermooxidizing stability of synthetic engine oil Mobis 5W-30 SL/CF with application of the graphic-analytical model expanding information about durability temperature range are presented. The research method and base of debugging tools and test means are presented in the first part of paper. The oil sample was thermostated in the specified temperature range (from 160 °C to 190 °C). Evaporability, optical density and thermooxidizing stability coefficient were determined during the research. Then the equations of the graphoanalytical model were computed and the rest values of the thermooxidizing stability coefficient were calculated without testing. The dependences of thermooxidizing stability coefficient on time testing at various temperatures, decimal logarithm of first passage time by thermooxidizing stability coefficient the set values, potential resource on testing temperature, thermooxidizing stability coefficient on testing temperature and first passage time by thermooxidizing stability coefficient the set value on testing temperature of synthetic engine oil Mobis 5W-30 SL/CF are presented by authors in the part “The results of research”. Regression equations, which describe the obtained dependences, are established. New indicators of thermooxidizing stability are offered. Regression equations characterize the temperature of temperature reforming beginning in the oil sample and the critical temperature at which there come the abnormal phenomena of processes of oxidation and evaporation.

Keywords

Thermooxidizing stability coefficient Graphic-analytical model The critical temperature of durability Durability temperature range The temperature of the temperature reforming beginning 

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Copyright information

© Springer Nature Switzerland AG 2019

Authors and Affiliations

  • A. N. Sokolnikov
    • 1
  • O. N. Petrov
    • 1
  • V. I. Vereshchagin
    • 1
  1. 1.Siberian Federal UniversityKrasnoyarskRussia

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