Future emission standards for heavy duty diesel engines will require the application of improved fuel injection systems with high pressure capability and electronic control of timing and fuelling. A recent Ricardo research project has concentrated on the application of the latest in-line pump from Robert Bosch, designated RP39, to a prototype turbocharged and aftercooled heavy duty diesel engine based on the Volvo TD122. The maximum pressure capability of the prototype RP39 used during the experiment was 1400-1500 bar at the injector nozzle. The pump also featured electronic control of the injection timing and rate by the sleeve control principle. The RP39 was matched to a revised low swirl combustion system. Results from steady state and transient tests are presented highlighting NOx/fuel economy/particulate trade-offs and their response to injection pressure, rate and timing, leading to a demonstration of how 1991 engineering targets for NOx and particulate were readily achieved and the 1994 legislative standard approached with limited development. The potential for further improvement is discussed.


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    Titel :

    APPLICATION OF AN ADVANCED IN-LINE INJECTION SYSTEM TO A HEAVY DUTY DIESEL ENGINE


    Weitere Titelangaben:

    Sae Technical Papers


    Beteiligte:
    Doyle, D. M. (Autor:in) / Needham, J. R. (Autor:in) / Freese, R. G. (Autor:in) / Faulkner, S. A. (Autor:in)

    Kongress:

    1989 SAE International Off-Highway and Powerplant Congress and Exposition ; 1989



    Erscheinungsdatum :

    1989-09-01




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




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