Testing of an OHC valve train with hydraulic lash adjuster in which the valve displacements, velocities and accelerations were measured and analyzed in both time and frequency domains, coupled with analysis of the frequency content of the valve acceleration function and its ramps, show that traditional designs of the opening and closing ramps used on some IC engine valve cams can exacerbate vibration in the follower system causing higher levels of spring surge and noise. Suggestions are made for improvement to the design of the beginning and ending transitions of valve motion which can potentially reduce dynamic oscillation and vibration in the follower train.


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    Titel :

    Effect of Valve-Cam Ramps on Valve Train Dynamics


    Weitere Titelangaben:

    Sae Technical Papers


    Beteiligte:

    Kongress:

    International Congress & Exposition ; 1999



    Erscheinungsdatum :

    1999-03-01




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch


    Schlagwörter :


    Effect of valve-cam ramps on valve train dynamics

    Norton,R.L. / Eovaldi,D. / Westbrook,J. et al. | Kraftfahrwesen | 1999


    TECHNIQUES IN EVALUATING VALVE TRAIN DYNAMICS

    BRINSON, LEO T. | SAE Technical Papers | 1960


    Valve train dynamics - a computer study

    Seidlitz,S. / Onan,US | Kraftfahrwesen | 1989


    Valve train lubrication

    Weaver,N. / Ford Motor,GB | Kraftfahrwesen | 1987


    Valve Train Dynamics-A Computer Study

    Seidlitz, Steve | SAE Technical Papers | 1989