The concept of load control in internal combustion engines by eliminating the inlet throttle and replacing it by controlling the piston stroke has gained great publicity recently. Nevertheless, certain design parameters should be considered in order to make this concept worthwhile. In this study, an optimized mechanism for varying engine stroke has been introduced. A criterion based upon the use of complex numbers technique was used to analyse the mechanism kinematically and the result were then verified using graphical solution. The mechanism was found to produce up to 56 % stroke variation within the control actuator capabilities. The compression ratio was found unchanged (within +/-6 %) which helps maintain steady combustion process. The entire mechanism is well tuned and no spark plug timing adjustment is required during stroke variation. The piston side thrust due to connecting rod angularities was found to be fairly low and should not impose any wear problems in the engine cylinder walls.


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    Titel :

    Variable stroke piston mechanism for spark ignition engines


    Weitere Titelangaben:

    Beeinflussung der Ladungsmenge einer Verbrennungskraftmaschine durch variablen Kolbenhub


    Beteiligte:
    Elkholy, A.H. (Autor:in)

    Erschienen in:

    Erscheinungsdatum :

    1995


    Format / Umfang :

    11 Seiten, 9 Bilder, 8 Quellen



    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Print


    Sprache :

    Englisch





    Variable stroke piston mechanism for spark ignition engines

    Elkholy,A.H. / UAE Univ.,Mech.Engng.Dep.,AE | Kraftfahrwesen | 1995


    Variable compression in spark ignition engines

    Pischinger,S. / Yapici,K.I. / Schwaderlapp,M. et al. | Kraftfahrwesen | 2001


    Rotary piston supercharger for spark ignition and diesel engines

    Heikrodt,K. / Pierburg,Neuss,DE | Kraftfahrwesen | 1989


    Rotary Piston Supercharger for Spark Ignition and Diesel Engines

    Heikrodt, Klaus | SAE Technical Papers | 1989