Previously reported tests (SAE 2005-01-3839) suggest that lubricant oxidative stability can be improved by running a spark ignition engine with fuels rich in light olefins (e.g. from a catalytically cracked refinery stream).To further our understanding, we have modelled the influence of fuel chemistry on the kinetics of lubricant oxidation. In the hypothesis presented here, the olefins interfere with key chain branching reactions in the lubricant oxidation process and react to form epoxides, which are sufficiently volatile to leave the lubricant.The modelling also predicts that ethanol has a directionally beneficial effect on lubricant oxidative stability. The effect of this will be limited because ethanol is much less soluble in lube-oil under prevailing engine conditions than heavier hydrocarbon components.


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    Titel :

    Influence of Fuel Properties on Lubricant Oxidative Stability: Part 2 - Chemical Kinetics Modelling


    Weitere Titelangaben:

    Sae Technical Papers


    Beteiligte:
    Stark, M. S. (Autor:in) / Cracknell, R. F. (Autor:in)

    Kongress:

    2007 Fuels and Emissions Conference ; 2007



    Erscheinungsdatum :

    2007-01-23




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch


    Schlagwörter :


    Influence of fuel properties on lubricant oxidative stability: part 2 - chemical kinetics modelling

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    Influence of fuel properties on lubricant oxidative stability: part 1 - engine tests

    Cracknell,R.F. / Head,R.A. / Shell Global Solutions,GB | Kraftfahrwesen | 2005


    Influence of Fuel Properties on Lubricant Oxidative Stability:Part 1 - Engine Tests

    Head, R. A. / Cracknell, R. F. | SAE Technical Papers | 2005


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    Modelling lubricant related fuel economy in heavy duty diesel engines

    Castle, R. / Arrowsmith, S. | Tema Archiv | 2003