The use of twin-scroll turbocharger turbine in automotive powertrain has been known for providing better transient performance over conventional single-scroll turbine. This has been accredited to the preservation of exhaust flow energy in the twin-scroll volute. In the current study, the performance comparison between a single and twin-scroll turbine has been made experimentally on a 1.5L passenger car gasoline engine. The uniqueness of the current study is that nearly identical engine hardware has been used for both the single and twin-scroll turbine volutes. This includes the intake and exhaust manifold geometry, turbocharger compressor, turbine rotor and volute scroll A/R variation trend over circumferential location. On top of that, the steady-state engine performance with both the volutes, has also been tuned to have matching brake torque. Such highly comparable setup enabled a more precise evaluation on the effect of pulse-isolation in the twin-scroll turbine volute during transient process. The steady-state performance comparison shows the amplitude of exhaust pulse in the twin-scroll volute is substantially higher than in the single-scroll volute, hence confirming the preservation of pulse exhaust energy. As a result, twin-scroll volute is found to be able to accelerate the engine boost pressure at a faster rate, therefore results in better transient response. The ultimate advantage of the twin-scroll turbine is further exemplified via engine Worldwide harmonized Light vehicles Test Cycle (WLTC) testing, where approximately 2.7% of averaged reduction in fuel consumption has been recorded. Majority of this improvement has been contributed by low to medium speed driving condition.


    Zugriff

    Zugriff prüfen

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Steady-State, Transient and WLTC Drive-Cycle Experimental Performance Comparison between Single-Scroll and Twin-Scroll Turbocharger Turbine


    Weitere Titelangaben:

    Sae Technical Papers


    Beteiligte:
    Tan, Feng Xian (Autor:in) / Chiong, Meng Soon (Autor:in) / Abas, Mohd Azman (Autor:in) / Ebisu, Motoki (Autor:in) / Martinez-Botas, Ricardo (Autor:in) / Ibaraki, Seiichi (Autor:in) / Rajoo, Srithar (Autor:in) / Yokoyama, Takao (Autor:in) / Fujita, Yutaka (Autor:in)

    Kongress:

    WCX SAE World Congress Experience ; 2019



    Erscheinungsdatum :

    2019-04-02




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




    Performance Improvement of an Asymmetric Twin Scroll Turbocharger Turbine through Secondary Flow Injection

    Romagnoli, Alessandro / Mamat, Aman / Kraft, Markus et al. | SAE Technical Papers | 2020



    Study of Variable Scroll Type Turbocharger (Determination of Shape of Scroll)

    Umezaki, Eisaku / Ogura, Masaru / Tomita, Tsuneo | SAE Technical Papers | 1989


    Study of variable scroll type turbocharger ( determination of shape of scroll )

    Ogura,M. / Umezaki,E. / Tomita,T. et al. | Kraftfahrwesen | 1989


    Understanding the Twin Scroll Turbine: Flow Similarity

    Brinkert, Nils | Online Contents | 2013