The lubrication regimes experienced by piston rings vary from full film hydrodynamic in the mid-stroke positions to mixed or boundary at the ends of the stroke. Full analyses of the mixed lubrication of piston rings have been made, but this work uses a simplified approach to analyse lubrication and friction in a modern automotive ring pack. The ring pack analysed in the work was from a current automotive engine with dimensions 90 mm diameter x 71 mm. The top ring is a barrel faced chrome plated compression ring, the second ring a tapered Napier scraper ring and the oil control ring is in three pieces, two chrome plated steel rails with a spring steel expander. This work makes approach to the determination of mixed friction based on a representation of the Stribeck curve. Predictions for friction show good correlation with test measurements, showing that the simplified analysis is useful and that the simplifications are justified.


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    Title :

    Analysis of friction in a modern automotive piston ring pack


    Additional title:

    Analyse der Reibung in einer modernen Kolbenring-Anordnung im Automobil


    Contributors:


    Publication date :

    1995


    Size :

    11 Seiten, 17 Bilder, 3 Tabellen, 11 Quellen



    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




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