To achieve acceptable valve train lubrication with low viscosity oil is challenging. Understanding the effect of valve train design parameter on valve train lubrication is important. In this study rocker arm valve train mechanism is analyzed to check the influence of valve train design parameters on lubrication at cam and rocker face interface. In valve train lubrication, lubrication oil film thickness play important role in valve train wear and friction. Main objective is to maintain acceptable oil film thickness at peak valve lift and minimizing the duration of critical minimum oil film thickness at cam flank to avoid wear at cam/ roller rocker follower interface when using low viscosity oil. Cam nose wear effect the engine performance and wear at cam flank change the dynamic characteristics of valve train.Lubrication oil entrainment velocity is an important parameter controlling the lubrication oil film thickness in elasto hydrodynamic lubrication zone at cam / roller rocker interface. Lubrication oil film thickness is proportional to lubrication entrainment velocity. High entrainment velocity is better for high lubrication oil film thickness. Valve train design parameters including contact geometry at cam rocker interface mainly control the entrainment velocity. Entrainment velocity also increases with engine operating RPM.This study is done using 1-D multi body dynamics simulation tools to quantify the effect of type of contact at cam / rocker face interface (slider and roller), valve train design parameter (cam base circle radius, roller radius) and different grade lubrication oil on lubrication oil film thickness which influences the friction and wear of valve train. Simulation methodology is developed to predict tribology behavior at cam / rocker face contact point.


    Zugriff

    Zugriff prüfen

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Parametric Study and Prediction of Lubrication Oil Film Thickness in Sliding and Rolling Interface Valve Trains


    Weitere Titelangaben:

    Sae Technical Papers


    Beteiligte:
    Singh, Amandeep (Autor:in) / Singh, Jaspreet (Autor:in) / Kumar, Narinder (Autor:in) / Poonia, Sanjay (Autor:in) / Sharma, Shailender (Autor:in)

    Kongress:

    WCX World Congress Experience ; 2018



    Erscheinungsdatum :

    2018-04-03




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




    Elastohydrodynamic Lubrication of Rolling-Sliding Surfaces

    Orcutt, F. K. / Cheng, H. S. | SAE Technical Papers | 1964


    The Lubrication of Engine Valve Trains Equipped with Ceramicized Followers

    Blahey, A. G. / Habeeb, J. J. / Rogers, W. N. | SAE Technical Papers | 1990


    The lubrication of engine valve trains equipped with ceramicised followers

    Blahey,A.G. / Habeeb,J.J. / Rogers,W.N. et al. | Kraftfahrwesen | 1990


    Lubrication in moving trains

    Engineering Index Backfile | 1892


    Pacific Harbor Line keeps trains rolling

    Simmons-Boardman Publishing Corporation 345 Hudson St., 12th Floor USA - 10014 New York | IuD Bahn | 2009