A study has been carried out to investigate the influence of soot-contaminated automotive lubricants in the wear process of a simulated engine valve train contact. Previous research on this topic has been mainly performed from a chemical point of view in fundamental studies, with insufficient relevance to real engine conditions, i.e. load and geometry. This study investigates the conditions under which wear occurs through specimen testing. The objective of the work was to understand the wear mechanisms that occur within the contaminated contact zone, to help in future development of a predictive wear model to assist in the valve-train design process. The effects of soot in lubricants have been tested using a reciprocating test-rig specifically designed for this application, where a steel disc is held in a bath of oil and a steel ball (replicating a valve train contact) is attached to a reciprocating arm. The materials, contact geometry and loading conditions are all related to specific conditions experienced within an engine's valve train. The testing was carried out under various contact conditions, using carbon black as a soot simulant. Wear measurements were taken during the tests and wear scar morphology was studied. The results have revealed how varying lubrication conditions changes the wear rate of engine components and determines the wear mechanism that dominates for specific situations.


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    Titel :

    Wear effects and mechanisms of soot-contaminated automotive lubricants


    Weitere Titelangaben:

    Verschleißauswirkungen und Verschleißmechanismen von rußkontaminierten Fahrzeugschmierstoffen


    Beteiligte:
    Green, D.A. (Autor:in) / Lewis, R. (Autor:in) / Dwyer-Joyce, R.S. (Autor:in)


    Erscheinungsdatum :

    2006


    Format / Umfang :

    11 Seiten, 12 Bilder, 4 Tabellen, 16 Quellen




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




    Investigation of Soot Contaminated Lubricant Wear Mechanisms

    GREEN, D.A. / LEWIS, R. | SAE Technical Papers | 2007


    Investigation of soot contaminated lubricant wear mechanism

    Green,D.A. / Lewis,R. / Univ.of Sheffield,GB | Kraftfahrwesen | 2007


    Contribution of Soot Contaminated Oils to Wear

    Ripple, Dave / Chitoor, K. / Durbha, M. et al. | SAE Technical Papers | 1998


    Contribution of soot contaminated oils to wear

    Gautam,M. / Durbha,M. / Chitoor,K. et al. | Kraftfahrwesen | 1998


    Laboratory Wear Tests With Automotive Gear Lubricants

    WHITE, H. S. / SWINDELLS, J. F. / McKEE, S. A. et al. | SAE Technical Papers | 1949