This study proposes a method to calculate the limit of piston ring conformability to deformed bore based on measured gas leakage flow rate through ring-bore gap and calculated gap area using a test device that allows the creation of arbitrary bore deformation. As a result, it was clarified that predicted conformability can be matched with measured value by modifying a constant value in the conformability equation for a single order bore deformation proposed by Dunaevsky and Tomanik et al. Furthermore, it has been confirmed experimentally that the conformability limit index ∑U for the complex bore deformation proposed by Tomanik is valid. Using ∑U, area of gap between piston ring and deformed bore under engine operating condition was calculated to derive the relationship between blow-by gas flow rate.


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    Title :

    Study on Ring Conformability under Bore Deformation


    Additional title:

    Sae Technical Papers


    Contributors:

    Conference:

    2019 JSAE/SAE Powertrains, Fuels and Lubricants ; 2019



    Publication date :

    2019-12-19




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English


    Keywords :


    Study on Ring Conformability under Bore Deformation

    Suzuki, Takashi / Yaguchi, Hiroshi | British Library Conference Proceedings | 2019


    Improved criterion for ring conformability under realistic bore deformation

    Tomanik,E. / Mahle,Brazil Technol.cCnter,BR | Automotive engineering | 2009



    Piston Ring Conformability in a Distorted Bore

    Tomanik, Eduardo | SAE Technical Papers | 1996


    Piston ring conformability on a distorted bore

    Tomanik,E. / Companhia Fabricadora de Pecas,CPFAP,BR | Automotive engineering | 1996