In order to predict cam wear in valve trains of engines quantitatively, multi-body system dynamic analysis, finite element quasi-statics contact analysis and numerical calculation of elastohydrodynamic lubrication are applied to obtain the dynamic loads, the time histories of contact pressure and the oil film thicknesses in a cam-tappet pair. Using this methodology, the wear depth of the cam in the valve train of a heavy load diesel engine is calculated, which is in good agreement with the measured value in the practical tests. The results show that the cam-tappet is operated in a mixed lubricant or a boundary lubricant regime and the wear depths on both the sides of the cam have been found to be the greatest.


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    Title :

    Simulation of Cam Wear in Valve Trains of Diesel Engines


    Additional title:

    Sae Int. J. Fuels Lubr
    Sae International Journal of Fuels and Lubricants


    Contributors:
    Duan, Lunjing (author) / Qin, Wenjie (author)

    Conference:

    SAE 2014 International Powertrain, Fuels & Lubricants Meeting ; 2014


    Published in:

    Publication date :

    2014-10-13


    Size :

    6 pages




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




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