The way in which exhaust valve failure is caused by the ash in crankcase oils is not well understood. This study provides an in-depth analysis of the failure mechanism. It includes: a field test, dynamometer tests, deposit and metallurgical analysis.The valves fail due to high-temperature oxidation and erosion. This results from a loss of deposit from the valve seat. There was a direct relation between the level of sulfated ash in the oil and the time to valve failure.The paper provides recommendations on the type of oils required to prevent these failures in two-cycle engines.


    Zugriff

    Zugriff prüfen

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    How Sulfated Ash in Oils Causes Catastrophic Diesel Exhaust Valve Failures


    Weitere Titelangaben:

    Sae Technical Papers


    Beteiligte:
    McGeehan, J. A. (Autor:in) / Gilmore, J. T. (Autor:in) / Thompson, R. M. (Autor:in)

    Kongress:

    1988 SAE International Fall Fuels and Lubricants Meeting and Exhibition ; 1988



    Erscheinungsdatum :

    1988-10-01




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




    How sulfated ash in oils causes catastrophic diesel exhaust valve failures

    McGeehan,J.A. / Gilmore,J.T. / Thompson,R.M. et al. | Kraftfahrwesen | 1988


    Preventing Catastrophic Camshaft Lobe Failures in Low Emission Diesel Engines

    Mc Geehan, J. A. / Ryason, P. R. | SAE Technical Papers | 2000


    Preventing catastrophic camshaft lobe failures in low emission diesel engines

    McGeehan,J.A. / Ryason,P.R. / Chevron,US | Kraftfahrwesen | 2000


    Avoiding catastrophic fatique failures

    Steele,J.M. / Law,T.C. / Stress Technology,US | Kraftfahrwesen | 1983