Borderline oil-pumpability temperatures (BPTs) were determined for U.S. Army diesel engine oils by conducting diesel engine motoring experiments in a cold box. Times for pumped lubricant to reach critical components were measured in unfired engines at simulated idle speeds (600-800 rpm). The variables-investigated included: four different diesel engine types found in the U.S. Army fleet; four different oil viscosity grades; and three different viscosity index improver chemical types. In general, for a given oil, the severity of engine oil pumpability by engine type in decreasing order was; the Continental LDT-465-1C and the Cummins VTA-903T were the most severe, and were approximately equivalent. The GM 6.2L engine was the next least severe with the DDC 6V-53T engine being the overall least severe. The different viscosity index improver chemistries of specially blended test oils included: olefin copolymer (OCP), styrene-iso-prene polymer (SI), and polymethacrylate (PMA). The PMA-containing 15W-40 oils had superior low-temperature oil pumpability performance in each engine in which they were evaluated. The BPTs determined by ASTM D 3829 did not completely predict diesel engine-derived BPTs. The linear regression correlation coefficients (R-squared) resulting from the two different BPT values ranged from 0.61 to 0.88. Based on the engine-derived BPTs, recommendations for revised low-temperature use limits for MIL-L-2104 oils were made.


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    Titel :

    Low-Temperature Pumpability of U.S. Army Diesel Engine Oils


    Weitere Titelangaben:

    Sae Technical Papers


    Beteiligte:
    Montemayor, A. F. (Autor:in) / Frame, E. A. (Autor:in) / Owens, E. C. (Autor:in)

    Kongress:

    1989 SAE International Fall Fuels and Lubricants Meeting and Exhibition ; 1989



    Erscheinungsdatum :

    01.09.1989




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch



    Low-temperature pumpability of US army diesel engine oils

    Frame,E.A: / Montemayor,A.F. / Owens,E.C. et al. | Kraftfahrwesen | 1989


    Low Temperature Pumpability of Engine Oils

    Stambaugh,R.L. / Rohm and Haas,US | Kraftfahrwesen | 1984


    Low Temperature Pumpability of Engine oils

    Stambaugh, R.L. | SAE Technical Papers | 1984


    Pumpability of Multigrade Engine Oils at Low Temperature

    Graham, J. P. / Smith,, M. F. | SAE Technical Papers | 1971


    Viscometer for Predicting Low-Temperature Pumpability of Engine Oils

    Alexander, D. L. / Rein, S. W. | SAE Technical Papers | 1977