Low speed pre-ignition (LSPI) is a type of engine knocking specific to turbocharged direct injection engines. There are numerous factors that affect the amount of LSPI produced by an engine. Some of these factors are related to engine hardware; others are specific to the fuel and engine oil. In this paper we focus on the effect of the engine oil base stock on LSPI. We conducted experiments in a stationary engine operating at conditions chosen to accentuate pre-ignition. Our results indicate that base stock viscosity has a statistically significant effect on the amount of low speed pre-ignition. Directionally, we found that engine oils formulated with higher viscosity base stocks produced more pre-ignition events. We measured the effect of base stock quality (defined by either Viscosity Index or concentration of aromatic species) to be small and statistically insignificant in our experimental data. In the course of our experimentation we detected a drift in the LSPI results from our test engines, and instituted an engine-hours correction on our results to compensate. We recommend that other researchers be wary of such a drift.


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    Titel :

    Investigation of Engine Oil Base Stock Effects on Low Speed Pre-Ignition in a Turbocharged Direct Injection SI Engine


    Weitere Titelangaben:

    Sae Int. J. Fuels Lubr
    Sae International Journal of Fuels and Lubricants


    Beteiligte:
    Andrews, Arthur (Autor:in) / Deckman, Douglas (Autor:in) / Patel, Mrugesh (Autor:in) / Burns, Raymond (Autor:in) / Dougherty, Richard (Autor:in)


    Erscheinungsdatum :

    2016-03-14


    Format / Umfang :

    8 pages




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch


    Schlagwörter :


    An Investigation on Low-Speed Pre-Ignition Mechanism in a Turbocharged Direct Injection Gasoline Engine

    Echigo, Ryo / Ito, Takanori / Miyai, Hisashi et al. | British Library Online Contents | 2015


    Turbocharged Spark Ignition Engine Simulation

    Watson, Neil | SAE Technical Papers | 1984


    Turbocharged spark ignition engine simulation

    Watson,N. | Kraftfahrwesen | 1984


    Investigation of Engine Oil Effect on Abnormal Combustion in Turbocharged Direct Injection - Spark Ignition Engines

    Takeuchi, Kazuo / Fujimoto, Kosuke / Yamashita, Minoru et al. | SAE Technical Papers | 2012


    Turbocharged Spark Ignition Two Stroke Engine

    Hardman, K. / Society of Automotive Engineers | British Library Conference Proceedings | 1994