The lower efficiency of the indirect-injection diesel engine, with respect to the direct injection type, is due to additional heat transfer from the combustion chamber, gas pumping between chambers, later injection timing and a different burning rate schedule.The paper describes a project to isolate and quantify these reasons for low efficiencies, using a mathematical model, supported by experimental verification.The model is based on a two-zone system (main and pre-chamber), with component models for heat transfer, gas flow through the passage etc. Experimentally derived heat release schedules in main and pre-chamber are used.It is shown that for a 0.1 m bore engine, with a Ricardo Comet Vb pre-chamber, the different burning rate schedule is the major contribution to the difference in efficiency, with injection timing and gas pumping being the least significant.


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    Titel :

    Thermodynamic Efficiency Evaluation of an Indirect Injection Diesel Engine


    Weitere Titelangaben:

    Sae Technical Papers


    Beteiligte:
    Kamel, M. (Autor:in) / Watson, N. (Autor:in)

    Kongress:

    1979 Automotive Engineering Congress and Exposition ; 1979



    Erscheinungsdatum :

    01.02.1979




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




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