The coefficient of friction between piston ring and cylinder wall (both average coefficient and coefficient at different points over the stroke) was measured on a test set-up in relation to rubbing speed, wall pressure and temperature, increase in running-in time, oil quantity, and type of oil. The average friction coefficients fluctuated between 0·02 and 0·14 and, for the same oil samples and test conditions at medium and high wall pressures, was much greater than the friction coefficients of a well-oiled journal bearing.


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    Title :

    Foreign Research Progress


    Subtitle :

    Translations Issued by the N.A.C.A.



    Publication date :

    1945-07-01


    Size :

    1 pages




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English



    Foreign Research Progress

    Emerald Group Publishing | 1943


    Foreign Research Progress

    Emerald Group Publishing | 1944


    Foreign Research Progress

    Emerald Group Publishing | 1944


    Foreign Research Progress

    Emerald Group Publishing | 1943


    Foreign Research Progress

    Emerald Group Publishing | 1944