In this paper, the advantages of using variable valve timing systems in order to decrease pumping losses are outlined. In the first part of the paper, the reduction of pumping losses through regulation of the engine load rate, by varying the time that the intake valve remains open, is justified by reasoning on ideal diagrams. In the second part, a proposed system to vary the valve timing diagram is described. This system consists mainly of a four-bar mechanism. Finally, the advantages and disadvantages of the proposed system are considered in the real engine by means of a calculation model. The conclusion is that with this system it is possible to obtain important improvements in the effective efficiency of the engine running at partial load.


    Zugriff

    Zugriff prüfen

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Reduction of Pumping Losses By the Use of a Variable Valve Timing System


    Beteiligte:
    Payri, F (Autor:in) / Boada, F (Autor:in) / Macián, V (Autor:in)


    Erscheinungsdatum :

    1984-10-01


    Format / Umfang :

    6 pages




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch



    Reduction of pumping losses by the use of a variable valve timing system

    Payri, F. / Boada, F. / Macian, V. | Tema Archiv | 1984


    VARIABLE VALVE TIMING SYSTEM

    TAKASHIBA YASUTO | Europäisches Patentamt | 2023

    Freier Zugriff

    Variable intake valve timing

    Heinrich,H. / Adamis,P. / Volkswagen,Wolfsburg,DE | Kraftfahrwesen | 1988


    The Fiat Variable Valve Timing

    Titolo,A. / Fiat Auto,IT | Kraftfahrwesen | 1985


    The FIAT variable valve timing

    Titolo,A. / Fiat,IT | Kraftfahrwesen | 1985