A variable compression ratio concept that can give a different expansion ratio to the compression ratio has been evaluated by means of a simulation of a turbocharged diesel engine. The VR/LE mechanism kinematics have been defined and described, and the compression ratio and expansion ratio have been presented as a function of the eccentric phase angle (αo). A zero-dimensional engine simulation that has been the subject of comprehensive validation, has been used as the basis of the VR/LE study. The effect of the compression ratio on the engine performance at fixed loads is presented. The principal benefits are a reduction in fuel consumption at part load of about 2%, and a reduction in ignition delay that leads to an estimated 6 dB reduction in combustion noise. The study has been conducted within the assumption of a maximum cylinder pressure of 160 bar.


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    Titel :

    VR/LE Engine Concept Application to the Turbocharged Diesel Engine


    Weitere Titelangaben:

    Sae Technical Papers


    Beteiligte:
    Teodorczyk, A. (Autor:in) / Stone, C.R. (Autor:in) / Leonard, H.J. (Autor:in) / Ladommatos, N. (Autor:in) / Charlton, S.J. (Autor:in) / Rychter, T.J. (Autor:in)

    Kongress:

    International Off-Highway & Powerplant Congress & Exposition ; 1991



    Erscheinungsdatum :

    1991-09-01




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




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