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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    Title :

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


    Additional title:

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


    Contributors:
    Ahling, Sebastian (author) / Tian, Tian (author) / Meng, Zhen (author)

    Conference:

    WCX SAE World Congress Experience ; 2019



    Publication date :

    2019-04-02


    Size :

    11 pages




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




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

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


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