This paper describes an investigation of a method of implementing VVT with the use of a secondary valve in series with the conventional intake valve of the engine. The secondary valve is not required to withstand the temperatures and pressures of combustion, and therefore can be of relatively lightweight design, so that it is easier to adjust the timing of the secondary valve than that of the main valve. Experiments with such a valve installed in a production engine indicate that benefits of variable valve timing such as overlap optimisation and throttleless load control (4% Fuel benefits at 980 rpm and 1.5 bar IMEP) are attainable with this system.


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    Titel :

    Variable Valve Timing Implemented with a Secondary Valve on a Four Cylinder SI Engine


    Weitere Titelangaben:

    Sae Technical Papers


    Beteiligte:
    Czekaj, James (Autor:in) / Roussopoulos, Kimon (Autor:in) / Guzzella, Lino (Autor:in) / Vogel, Olivier (Autor:in)

    Kongress:

    International Congress & Exposition ; 1997



    Erscheinungsdatum :

    24.02.1997




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch


    Schlagwörter :


    Variable valve timing implemented with a secondary valve on a four cylinder spark ignition engine

    Vogel,O. / Roussopoulos,K. / Guttella,L. et al. | Kraftfahrwesen | 1997


    An Initial Study of Variable Valve Timing Implemented with a Secondary Valve in the Intake Runner

    Czekaj, James / Roussopoulos, Kimon / Guzzella, Lino et al. | SAE Technical Papers | 1996


    Engine In-Cylinder Flow Control via Variable Intake Valve Timing

    Karhoff, Daniel-Christian / Bücker, Isabella / Klaas, Michael et al. | SAE Technical Papers | 2013


    Engine In-Cylinder Flow Control via Variable Intake Valve Timing

    Bucker, I. / Karhoff, D.-C. / Klaas, M. et al. | British Library Conference Proceedings | 2013