This paper describes the results of using the Southwest Research Institute (SwRI) engine friction model to examine the effects of changing certain design parameters on the friction of a gasoline engine. The paper gives the results of an examination of the effects of changing the main and cam-shaft bearing aspect ratio on the friction of those bearings, and the effect of the tension of the piston rings, and the gas loading on them.The model predicts that the friction of the piston rings is the highest single component in the friction, except at high engine speeds, where the predicted windage was greater. Next, after the piston rings, was the piston skirt friction. The remaining components were relatively small, and in order of importance were the accessories, the cam bearing friction, cam/tappet friction, the main bearing, the crank pin, and oscillatory friction in the valve train, in that order.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Engine Friction Modeling


    Additional title:

    Sae Technical Papers


    Contributors:

    Conference:

    International Congress & Exposition ; 1992



    Publication date :

    1992-02-01




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




    Engine friction modeling

    Thring,R.H. / Southwest Research Inst.,San Antonio,US | Automotive engineering | 1992


    Lamborghini Approach to Engine Downsizing Engine Friction Modeling

    Cacciatore, Diego / Ring, Felix / Hermsen, Franz-Gerd et al. | SAE Technical Papers | 2013


    Lamborghini Approach to Engine Downsizing Engine Friction Modeling

    Meloni, M. / Cacciatore, D. / Dohmen, J. et al. | British Library Conference Proceedings | 2013


    Engine friction

    McLeod, M.K. | Engineering Index Backfile | 1937


    ENGINE FRICTION ANALYSIS

    Carson, G. B. / Lichty, L. C. | SAE Technical Papers | 1939