Using small thin-film pressure sensors deposited onto a piston skirt surface, oil-film pressure on the piston skirt surface is measured when piston slap noise is generated without affecting the surface geometry, stiffness and mass of the piston. Under a no-load firing engine condition and at low temperature, the measured oil-film pressure corresponded well to the measured acceleration of the cylinder liner, which is indicative of piston slap noise, confirming the validity of the present method. Moreover, the oil-film pressure distribution on the skirt surface was measured for different engine speeds and piston pin offsets, which enabled more insight to be provided into piston secondary motion than that by considering the effects of cylinder liner acceleration.


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    Title :

    Measurement of Piston Skirt Oil-film Pressure under Piston Slap


    Additional title:

    Sae Technical Papers


    Contributors:

    Conference:

    SAE 2007 Noise and Vibration Conference and Exhibition ; 2007



    Publication date :

    2007-05-15




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




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