PREDICTION OF LUBRICATING OIL LIFE FOR ELECTRIC VEHICLE REDUCER BASED ON ARRHENIUS EQUATION

Abstract

Abstract: In order to accurately predict the remaining service life of lubricating oil and guide the formulation of lubrication oil change cycle, the acid number change of lubricating oil for electric vehicle reducers under the condition of high-temperature thermal oxidation was studied. Based on the Arrhenius equation, a linear regression curve was drawn to calculate the oxidation activation energy and frequency factor, a theoretical life model of lubricating oil at different temperatures was established and used to evaluate the service life of lubricating oil after high-speed and high load endurance test of electric vehicle reducers. The results showed that the acid value of lubricating oil increased rapidly with the increase of oxidation temperature. When oxidation temperature increased 20 ℃, the service life of lubricating oil would shorten by 65%-85%. After the high-speed and high-load practical durability tests, the theoretical service life of lubricating oil was still over 90%. The predicted values of the life model based on the Arrhenius equation were in good agreement with the test values, which could be used to evaluate the remaining service life of lubricaing oil and guide the formulation of oil change cycle.

Key words: electric vehicle, reducer oil, oxidation, dynamics, remaining service life, prediction model

References

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