Although metallic compounds are widely known to affect combustion in internal combustion engines, the potential of metallic additives in engine oils to initiate abnormal combustion has been unclear. In this study, we investigated the influence of combustion chamber deposits derived from engine oil additives on combustion in a spark-ignited engine. We used a single-cylinder four-stroke engine, and measured several combustion characteristics (e.g., cylinder pressure, in-cylinder ultraviolet absorbance in the end-gas region, and visualized flame propagation) to evaluate combustion anomalies. To clarify the effects of individual additive components, we formed combustion products of individual additives in a combustion chamber prior to measuring combustion characteristics. We tested three types of metallic additives: a calcium-based detergent, a zinc-based antiwear agent, and a molybdenum-based friction modifier. Measurements of combustion characteristics after deposit formation revealed that the deposits derived from the calcium and zinc compounds facilitated auto-ignition and increased knock intensity. However, the deposits from molybdenum compounds showed no significant impact on auto-ignition. Our results showed that the chemical composition of combustion chamber deposits has specific effects relating to abnormal combustion in spark-ignited engines.


    Zugriff

    Zugriff prüfen

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Abnormal Combustion Induced by Combustion Chamber Deposits Derived from Engine Oil Additives in a Spark-Ignited Engine


    Weitere Titelangaben:

    Sae Int. J. Engines


    Beteiligte:
    Iijima, Akira (Autor:in) / Kamano, Hideki (Autor:in) / Shoji, Hideo (Autor:in) / Tamura, Kazushi (Autor:in) / Hayakawa, Norikuni (Autor:in) / Ishino, Takashi (Autor:in) / Miyasaka, Tomomi (Autor:in) / Utaka, Toshimasa (Autor:in)

    Kongress:

    SAE/JSAE 2014 Small Engine Technology Conference & Exhibition ; 2014


    Erschienen in:

    Erscheinungsdatum :

    2014-11-11


    Format / Umfang :

    6 pages




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




    Abnormal Combustion in a Two-Stroke Spark Ignited Methanol Engine

    Pundir, B.P. / Abraham, Mathew / Maji, S. et al. | SAE Technical Papers | 1988


    Abnormal combustion in a two-stroke spark ignited methanol engine

    Maji,S. / Abraham,M. / Pundir,B.P. et al. | Kraftfahrwesen | 1988


    Fast response self optimizing spark ignited internal combustion engine

    May,M.G. / Antipollution Indust.Res.,CH | Kraftfahrwesen | 1983


    Combustion and emissions characteristics of small spark-ignited LPG engine

    Li,L. / Wang,Z. / Deng,B. et al. | Kraftfahrwesen | 2002


    Stabilized Combustion in a Spark Ignited Engine through a Long Spark Duration

    Nakai,M. / Nakagawa,Y. / Hamai,K. et al. | Kraftfahrwesen | 1985