Optimal design of modern direct injection spark-ignition engines depends heavily on the characteristics and distribution of the fuel spray. This study was designed to investigate changes in the spray properties due to fuel volatility and operating conditions using a firing optically-accessible engine with planar laser-induced fluorescence (PLIF) imaging. The results show that the spray structure changes not only with ambient gas density, which is often measured, but also with fuel temperature and volatility. As ambient pressure decreases and fuel temperature increases, the volatile ends of multi-component fuels evaporate quickly, disrupting the spray structure and producing a vapor core along the axis of the spray. Beyond a certain point, evaporation is rapid enough to expand the initial cone angle of the spray while causing a decrease in the overall spray width. The axial and radial penetration of these sprays was found to depend on the fuel temperature, the ambient density, and vapor generation.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Effects of Fuel Volatility and Operating Conditions on Fuel Sprays in DISI Engines: (1) Imaging Investigation


    Additional title:

    Sae Technical Papers


    Contributors:

    Conference:

    SAE 2000 World Congress ; 2000



    Publication date :

    2000-03-06




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




    Effects of fuel volatility and operating conditions on fuel sprays in DISI engines: (1) imaging investigation

    van der Wege,B.A. / Hochgreb,S. / Ford Motor,US et al. | Automotive engineering | 2000



    Effects of fuel volatility and operating conditions on fuel sprays in DISI engines: (2) PDPA investigation

    Wege,B.A.van der / Hochgreb,S. / Ford Motor,US et al. | Automotive engineering | 2000


    Numerical modeling of fuel sprays in DISI engines under early-injection operating conditions

    VanDerWege,B.A. / Lounsberry,T.H. / Hochgreb,S. et al. | Automotive engineering | 2000


    Numerical Modeling of Fuel Sprays in DISI Engines Under Early-Injection Operating Conditions

    VanDerWege, Brad A. / Hochgreb, Simone / Lounsberry, Todd H. | SAE Technical Papers | 2000