The relationship between procedures A and B of the ASTM D 3945 diesel injector shear stability test has been examined with respect to sheardown rate constants and severity after extended shearing. Significant differences were found between Procedure A and procedure B. Tests of varying duration in the two instruments showed that the shear down rates are such that the standard 30 cycle test of Procedure A is equivalent to 40 cycles or twice the number of cycles in procedure B. The severities of the two instruments after extended duration tests were approximately equivalent for two common Viscosity Index improvers. However, for polymethacrylate (PMA) VI Improvers, the Procedure B apparatus was 20 percent more severe. On the basis of these results, it is recommended that procedures A and B in ASTM D 3945 be given separate methods.


    Zugriff

    Zugriff prüfen

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Relationship Between Engine Oil Bench Shear Stability Tests


    Weitere Titelangaben:

    Sae Technical Papers


    Beteiligte:
    Alexander, D. L. (Autor:in) / Rein, S. W. (Autor:in)

    Kongress:

    1987 SAE International Fall Fuels and Lubricants Meeting and Exhibition ; 1987



    Erscheinungsdatum :

    01.11.1987




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




    Relationship between engine oil bench shear stability tests

    Alexander,D.L. / Rein,S.W. / Texaco,US | Kraftfahrwesen | 1987


    Predicting the Shear Stability of Multigrade Engine Oils from Bench Tests

    McMillan, M. L. / Stewart, R. M. | SAE Technical Papers | 1975


    A Bench Scale Engine Test for Shear Stability of Multigrade Engine Oils

    Talbot, A. F. / Morris, H. I. / Wright, W. A. | SAE Technical Papers | 1973


    A Mathematical Technique for Comparing Shear Stability in Bench Tests and Service

    Lewis, B. J. / Marshall, H. T. / Randall, N. P. et al. | SAE Technical Papers | 1977


    A Mathematical Technique for Comparing Shear Stability in Bench Tests and Service

    Rein,S.W. / Randall,N.P. / Marshall,H.T. et al. | Kraftfahrwesen | 1977