Wet-sump transmissions are widely used in heavy duty and medium duty vehicles. As these transmissions do not have a dedicated forced lubrication system, it is important that the gear train, shafts, and enclosure are designed appropriately so that enough oil splashes to critical locations to ensure sufficient lubrication. The lubrication effectiveness of such transmissions can be studied through detailed tests or numerical simulations.Often, the vehicle, and therefore the transmission, encounters some severe operating conditions, such as climbing on an incline, driving downhill, etc. Studying these conditions through tests is an expensive process and this imposes the need for an analysis first approach. In this paper, the 3D multiphase Volume of Fluid (VOF) method is used to examine two such extreme cases: an 8-degree tilted installation of transmission in a vehicle, and an inclined condition of transmission during a 10-degree uphill climb. By studying the oil volume fraction on gears and splash patterns, inertia and reverse gears in the first case and headset gear in the second case are found susceptible to oil starvation. The effectiveness of a simple and easily deployable solution of increasing the transmission oil level is then assessed. Results show that increasing the oil level improves the lubrication effectiveness in the first case, but only slightly in the second case. However, both cases show higher churning losses. This calls for a trade-off between lubrication effectiveness and power/torque consumption. Present work demonstrates how the developed methodology can help identify oil-starving locations and evaluate potential solutions for extreme cases, eliminating the need for testing multiple prototypes before arriving at a suitable solution.


    Zugriff

    Zugriff prüfen

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Lubrication Effectiveness Determination for Wet-Sump Transmissions using Multiphase Computational Fluid Dynamics Modeling


    Weitere Titelangaben:

    Sae Technical Papers


    Beteiligte:
    Sachdeva, Aniket (Autor:in) / Sena, Carlos (Autor:in) / Handa, Joji (Autor:in) / Marson, Luigi (Autor:in) / R, Shamini (Autor:in)

    Kongress:

    Symposium on International Automotive Technology ; 2024



    Erscheinungsdatum :

    2024-01-16




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




    Engine Lubrication System Model for Sump Oil Temperature Prediction

    Zoz, S. / Strepek, S. / Wiseman, M. et al. | British Library Conference Proceedings | 2001


    Engine lubrication system model for sump oil temperature prediction

    Zoz,S. / Strepek,S. / Wiseman,M. et al. | Kraftfahrwesen | 2001


    Engine Lubrication System Model for Sump Oil Temperature Prediction

    Qian, Cheng / Wiseman, Marc / Strepek, Steve et al. | SAE Technical Papers | 2001


    Lubrication systems for transmissions

    DZIUBA DYLAN I / BALDYGA JOHN J / MONTORO GUY JUAN et al. | Europäisches Patentamt | 2021

    Freier Zugriff

    Computational fluid dynamics of multiphase flows in solid rocket motors

    Shimada, Toru / Daimon, Yu / Sekino, Nobuhiro | TIBKAT | 2006