Dilution of engine oil occurs when fuel is injected late in the combustion cycle to regenerate the diesel paniculate filter used for trapping paniculate emissions. Fuel dilution reduces oil viscosity and the concentration of engine oil additives, potentially compromising lubricantperformance. Biodiesel usage may compound these issues due to its oxidative instability, and its higher boiling point compared to mineral diesel potentially causes it to concentrate more in the oil sump. In this work, different amounts of mineral diesel and biodiesel (soy methyl ester, SME) were combined with 15W-40 CJ-4 diesel engine oil in laboratory oil aging experiments. Fuel was added and oil samples were withdrawn at periodic intervals. The oils were analyzed using typical oil analysis procedures to determine their condition, and wear evaluations under boundary lubricating conditions were determined using a high-frequency reciprocating rig (HFRR). Results showed that fuel dilution accelerated engine oil degradation, with biodiesel having a larger effect. However, friction remained unchanged with dilution, and wear actually decreased for fuel-diluted oils after 48 h of aging compared to aging without fuel dilution. Examination of the tribofilms by ultraviolet (UV) and visible Raman spectroscopy as well as Auger electron spectroscopy showed that additional carbon-containing components were present on tribofilms formed from fuel-diluted oils. These fuel-derived components may be responsible for the decreased wear observed.


    Zugriff

    Zugriff über TIB

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Comparison of the effects of biodiesel and mineral diesel fuel dilution on aged engine oil properties


    Beteiligte:

    Erschienen in:

    Tribology Transactions ; 54 , 5 ; 749-763


    Erscheinungsdatum :

    2011


    Format / Umfang :

    15 Seiten, 15 Bilder, 1 Tabelle, 38 Quellen




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Print


    Sprache :

    Englisch




    Biodiesel and Fuel Dilution of Engine Oil

    Andreae, M. / Fang, H. / Bhandary, K. et al. | British Library Conference Proceedings | 2007


    Biodiesel and Fuel Dilution of Engine Oil

    Fang, Howard / Bhandary, Kirtan / Andreae, Morgan | SAE Technical Papers | 2007


    Biodiesel and fuel dilution of engine oil

    Andereae,M. / Fang,H. / Bhandary,K. et al. | Kraftfahrwesen | 2007


    Impacts of Biodiesel Fuel Blends Oil Dilution on Light-Duty Diesel Engine Operation

    Luecke, Jon / Thornton, Matthew J. / McCormick, Robert L. et al. | SAE Technical Papers | 2009


    Impacts of biodiesel fuel blends oil dilution on light-duty diesel engine operation

    Thornton,M.J. / Alleman,T.L. / Luecke,J. et al. | Kraftfahrwesen | 2009