The ignition delay under various temperature and pressure conditions considering volumetric change is investigated both by experiments and simulation to give some basic data of ignition delay for a DME DI diesel engine. The combustion process in a DME direct injected diesel engine was also observed to help understanding of the difference between DME combustion and that of a diesel fuel. For DME fuel, it was clear that the luminous flame duration is much shorter than that of diesel fuel. The calculated results of ignition delay for high equivalence(ϕ =0.4 in this study) showed good accord qualitatively to those of measured at wide range of temperature and pressure conditions investigated in this work. There exists the negative temperature coefficient region near the temperature of 800K. This study shows basic guideline for optimal injection timing for DME fueled compression ignition engines.


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    Titel :

    The Prediction of Autoignition in a DME Direct Injection Diesel Engine


    Weitere Titelangaben:

    Sae Technical Papers


    Beteiligte:
    Kim, Insu (Autor:in) / Goto, Shinichi (Autor:in)

    Kongress:

    CEC/SAE Spring Fuels & Lubricants Meeting & Exposition ; 2000



    Erscheinungsdatum :

    19.06.2000




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




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    Kim,I. / Goto,S. / Mechanical Engng.Lab.,KR | Kraftfahrwesen | 2000


    Chemoluminescence imaging of autoignition in a direct injection diesel engine

    Dec,J.E. / Espey,C. / Sandia National Lab.,Livermore,US et al. | Kraftfahrwesen | 1998




    Chemiluminescence Imaging of Autoignition in a DI Diesel Engine

    Espey, Christoph / Dec, John E. | SAE Technical Papers | 1998