Due to increasing demands for further CO2 reduction and tighter exhaust emissions regulations, automakers are increasingly downsizing turbo-charged diesel engines by raising specific power, or adopting low-pressure loop exhaust gas recirculation (LPL-EGR) systems to improve the EGR rate.However, adopting a higher boost pressure to increase the specific power, or introducing hot exhaust gas before the turbocharger compressor with the LPL-EGR system creates higher gas temperatures in the compressor, which results in soot-containing deposits derived from the engine oil in the compressor. This phenomenon causes significant deterioration of turbocharger efficiency. Therefore, countermeasures such as restricting boost pressure or limiting EGR usage in the operational map are necessary to prevent engine performance deterioration. Increasing the gas temperature in the compressor while preventing deposit formation should enable further improvements in fuel consumption and engine power.This paper investigates the root causes of compressor deposit formation to achieve better engine performance. Fired diesel engine tests were run at various operational conditions to investigate the influence of engine oil degradation and oil properties. Deposits from the compressor were recovered and analyzed in detail. As a result, it was confirmed that the evaporation characteristics of engine oil have a significant influence on deposit formation, and that engine oil can be formulated to provide better deposit control at greatly higher gas temperatures in the compressor while maintaining other engine oil properties suitable for production.These results should contribute to further improvements in fuel consumption and power for future diesel engines.


    Zugriff

    Zugriff prüfen

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Influence of Engine Oil Properties on Soot Containing Deposit Formation in Turbocharger Compressor


    Weitere Titelangaben:

    Sae Technical Papers


    Beteiligte:
    Ito, Koki (Autor:in) / Fujimoto, Kosuke (Autor:in) / Sumi, Norihiko (Autor:in) / Hirano, Satoshi (Autor:in) / Nakajima, Takeshi (Autor:in) / Kudo, Yosuke (Autor:in)

    Kongress:

    SAE/KSAE 2013 International Powertrains, Fuels & Lubricants Meeting ; 2013



    Erscheinungsdatum :

    14.10.2013




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




    Influence of Engine Oil Properties on Soot Containing Deposit Formation in Turbocharger Compressor

    Sumi, N. / Hirano, S. / Fujimoto, K. et al. | British Library Conference Proceedings | 2013


    Investigation of Compressor Deposit in Turbocharger for Gasoline Engines (Part 1: Research on Deposit Formation Mechanism)

    Ura, Haruto / Kuma, Hiroshi / Ishizaki, Noriya et al. | SAE Technical Papers | 2023


    Investigation of Compressor Deposit in Turbocharger for Gasoline Engines (Part 1: Research on Deposit Formation Mechanism)

    Ishizaki, Noriya / Hirano, Satoshi / Kuma, Hiroshi et al. | British Library Conference Proceedings | 2023


    Investigation of Compressor Deposit in Turbocharger for Gasoline Engines (Part 2: Practical Application to Turbocharger)

    Ura, Haruto / Kuma, Hiroshi / Ishizaki, Noriya et al. | SAE Technical Papers | 2023


    Investigation of Compressor Deposit in Turbocharger for Gasoline Engines (Part 2: Practical Application to Turbocharger)

    Ura, Haruto / Kuma, Hiroshi / Hirano, Satoshi et al. | British Library Conference Proceedings | 2023