Investigations on static and dynamic behaviour of brake-disc geometry were carried out by new, purpose-designed methods in order to describe the excitation mechanism of brake judder. Disc thickness variations were found to be the main cause for brake-torque variations and thus for judder. Effects on 'hurting and healing' static brake-disc geometry were analysed in test stand and real-road measurements. Thermal and mechanic influences on dynamic disc geometry were observed. Additionally, mechanic distortion of the disc axis by acting forces on wheel, hub and disc like imbalance- and rolling-resistance forces proved to reinforce disc thickness variations fictitiously. This firstly observed phenomenon was called 'virtual' dynamic brake-disc geometry.


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    Title :

    Dynamic behaviour of brake-disc geometry as cause of brake judder


    Additional title:

    Das dynamische Verhalten der Bremsscheiben als Ursache für Vibrationen bei Bremsen


    Contributors:
    Engel, H.G. (author) / Bachmann, T. (author) / Eichorn, U. (author) / Saame, C. (author)


    Publication date :

    1993


    Size :

    17 Seiten, 11 Bilder, 3 Quellen


    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




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