This paper describes tests of friction-reducing coatings applied to single-cylinder, splash-lubricated, gasoline engines. The suppliers of the coatings anticipated a significant, (10-15%), decrease in fuel consumption as a result of covering most engine contact surfaces with a proprietary, FIFE-type plastic. However, a brief analysis indicates that possible benefits should be closer to 3% at high engine loads. To establish coating effectiveness, carefully controlled fuel economy testing of two engines was performed on a water-braise dynamometer at one engine speed and two output torque levels (approximately 70% and 95% of rated load). Test results showed increased fuel consumption on both coated engines compared with uncoated engines. Direct comparisons showed fuel consumption was 8% higher at full load and 10% higher at part load. This unexpected increase in fuel consumption was attributed to increased friction in the journal bearings of the engine. The coating interfered with the normal hydrodynamic lubrication,


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    Titel :

    Testing an Anti-Friction Coating in a Small Engine


    Weitere Titelangaben:

    Sae Technical Papers


    Beteiligte:
    Kinnaird, D. W. (Autor:in) / Koyanagi, J. C. (Autor:in) / Baker, J. T. (Autor:in) / Koenig, K. E. (Autor:in) / Checkel, M. D. (Autor:in)

    Kongress:

    Small Engine Technology Conference & Exposition ; 1989



    Erscheinungsdatum :

    1989-09-01




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




    Testing an anti-friction coating in a small engine

    Checkel,M.D. / Baker,J.T. / Kinnaird,D.W. et al. | Kraftfahrwesen | 1989




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