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The Effects of Ultra-Low Viscosity Engine Oil on Mechanical Efficiency and Fuel Economy

Author

Listed:
  • Yanyan Zhang

    (Power Machinery & Vehicular Engineering Institute, Zhejiang University, Hangzhou 310007, China)

  • Ziyuan Ma

    (Power Machinery & Vehicular Engineering Institute, Zhejiang University, Hangzhou 310007, China)

  • Yan Feng

    (Zhejiang Engineering Research Center for Advanced Hydraulic Equipment, School of Mechanical and Automotive Engineering, Zhejiang University of Water Resources and Electric Power, Hangzhou 310018, China)

  • Ziyu Diao

    (Power Machinery & Vehicular Engineering Institute, Zhejiang University, Hangzhou 310007, China)

  • Zhentao Liu

    (Power Machinery & Vehicular Engineering Institute, Zhejiang University, Hangzhou 310007, China)

Abstract

The development of a sustainable powertrain requires improved thermal efficiency. Reducing frictional power losses through the use of ultra-low viscosity oil is one of the most effective and economical ways. To assess the potential for efficiency enhancement in a new generation of future engines using low-viscosity oils, a technical analysis was conducted based on numerical simulation and theoretical analysis. This study proposes a numerical method coupling the whole multi-dynamics model and lubrication model under mixed lubrication regimes. Then, load distribution was calculated numerically and verified experimentally. Finally, this paper compares the bearing load and frictional energy loss of the main bearings when using The Society of Automotive Engineers (SAE) 15W40 and SAE 0W20 oil. The results indicate that the application of ultralow-viscosity lubricant can reduce the hydraulic friction loss up to 24%, but the asperity friction loss would increase due to the reduction in load capacity. As a result, the design of a new generation of high efficiency internal combustion engines requires careful calculation and design to balance the trade-off relations between hydraulic friction and asperity friction.

Suggested Citation

  • Yanyan Zhang & Ziyuan Ma & Yan Feng & Ziyu Diao & Zhentao Liu, 2021. "The Effects of Ultra-Low Viscosity Engine Oil on Mechanical Efficiency and Fuel Economy," Energies, MDPI, vol. 14(8), pages 1-20, April.
    • Handle: RePEc:gam:jeners:v:14:y:2021:i:8:p:2320-:d:539674
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    References listed on IDEAS

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    Cited by:

    1. Leszek Chybowski & Przemysław Kowalak & Piotr Dąbrowski, 2023. "Assessment of the Impact of Lubricating Oil Contamination by Biodiesel on Trunk Piston Engine Reliability," Energies, MDPI, vol. 16(13), pages 1-30, June.
    2. Leszek Chybowski, 2023. "Study of the Relationship between the Level of Lubricating Oil Contamination with Distillation Fuel and the Risk of Explosion in the Crankcase of a Marine Trunk Type Engine," Energies, MDPI, vol. 16(2), pages 1-38, January.

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