The distribution of lubricating oil plays a critical role in determining the friction between piston skirt and cylinder liner, which is one of the major contributors to the total friction loss in internal combustion engines. In this work, based upon the experimental observation an existing model for the piston secondary motion and skirt lubrication was improved with a physics-based model describing the oil film separation from full film to partial film. Then the model was applied to a modern turbo-charged SI engine. The piston-skirt FMEP predicted by the model decreased with larger installation clearance, which was also observed from the measurements using IMEP method at the rated. It was found that the main period of the cycle exhibiting friction reduction is in the expansion stroke when the skirt only contacts the thrust side for all tested installation clearances. The main reason for lower skirt friction with larger clearance is greater amount of oil available during the expansion stroke.


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    Titel :

    Modeling of Oil Transport between Piston Skirt and Cylinder Liner in Internal Combustion Engines


    Weitere Titelangaben:

    Sae Int. J. Adv. and Curr. Prac. in Mobility


    Beteiligte:
    Ahling, Sebastian (Autor:in) / Tian, Tian (Autor:in) / Meng, Zhen (Autor:in)

    Kongress:

    WCX SAE World Congress Experience ; 2019



    Erscheinungsdatum :

    02.04.2019


    Format / Umfang :

    11 pages




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




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    Meng, Zhen / Ahling, Sebastian / Tian, Tian | British Library Conference Proceedings | 2019


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    Thring,R.H. / Southwest Research Inst.,San Antonio,US | Kraftfahrwesen | 1989



    Computer simulation of piston-piston ring-cylinder liner coatings in combustion engines

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