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  • Six different commercially distributed four-stroke motorcycle engine oils of 10W--40 viscosity class were evaluated. Two of the oils were of semi--synthetic type, four of synthetic type. All oils were assumed to be Newtonian fluids, thus flow curves were not determined. Oils were cooled to below zero temperatures and under controlled temperature regulation kinematic viscosity (mm2.s-1) was measured in the range of --5°C and +115°C. Anton Paar digital viscometer with concentric cylinders geometry was used. In accordance with expected behavior, kinematic viscosity of all oils was decreasing with increasing temperature. Viscosity was found to be independent of oil density. Temperature dependence was modeled using several mathematical models: Vogel equation, Arrhenius equation, polynomial, and Gaussian equation. The best match between experimental and computed data was obtained for Gaussian equation (R2 =0.9993). Knowledge of viscosity behavior of an engine oil as a function of its temperature is of great importance, especially when considering running efficiency and performance of combustion engines.
  • Six different commercially distributed four-stroke motorcycle engine oils of 10W--40 viscosity class were evaluated. Two of the oils were of semi--synthetic type, four of synthetic type. All oils were assumed to be Newtonian fluids, thus flow curves were not determined. Oils were cooled to below zero temperatures and under controlled temperature regulation kinematic viscosity (mm2.s-1) was measured in the range of --5°C and +115°C. Anton Paar digital viscometer with concentric cylinders geometry was used. In accordance with expected behavior, kinematic viscosity of all oils was decreasing with increasing temperature. Viscosity was found to be independent of oil density. Temperature dependence was modeled using several mathematical models: Vogel equation, Arrhenius equation, polynomial, and Gaussian equation. The best match between experimental and computed data was obtained for Gaussian equation (R2 =0.9993). Knowledge of viscosity behavior of an engine oil as a function of its temperature is of great importance, especially when considering running efficiency and performance of combustion engines. (en)
Title
  • Kinematic Viscosity of Four-stroke Engine Oils
  • Kinematic Viscosity of Four-stroke Engine Oils (en)
skos:prefLabel
  • Kinematic Viscosity of Four-stroke Engine Oils
  • Kinematic Viscosity of Four-stroke Engine Oils (en)
skos:notation
  • RIV/62156489:43210/12:00190051!RIV13-MSM-43210___
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  • 144638
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  • RIV/62156489:43210/12:00190051
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  • engine oil; mathematical modeling; kinematic viscosity (en)
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  • LT - Litevská republika
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  • [745FE6E9ED22]
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  • Journal of young scientists = Jaunuju Mokslininku Darbai
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  • 36
http://linked.open...iv/tvurceVysledku
  • Dostál, Petr
  • Čupera, Jiří
  • Kumbár, Vojtěch
  • Sabaliauskas, Artüras
issn
  • 1648-8776
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http://localhost/t...ganizacniJednotka
  • 43210
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