In the last few years fundamental investigations of the excitation and transfer mechanism of brake judder in real operating conditions on the road were carried out at the Department of Automotive Engineering (fzd, Head: Prof. Dr.-Ing. B. Breuer) of Darmstadt Technical University (THD). Monitoring brake parameters, especially the dynamic brake-disc geometry, during judder led to a profound understanding of the excitation mechanism. The simultaneous measurement of accelerations along the transfer path from excitation to the driver's contact points and the development of a suitable method to analyse global and local system behaviour enabled a better understanding of the transfer mechanism. An evident interaction between excitation and transfer mechanism was found; the dynamic behaviour of the brake-disc influences knuckle vibrations and vice versa. This underlined the necessity to examine the total system including not only the brake but the suspension and steering system was well. This paper describes a system approach to brake judder, that was elaborated by ITT Automotive Europe (subsystem brake), FAG Kugelfischer (subsystem hub-bearing unit) and fzd (subsystems suspension and steering).


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    Title :

    System approach to brake judder


    Additional title:

    Systematische Methode zur Behandlung von Bremsschwingungen


    Contributors:
    Engel, H.G. (author) / Hassiotis, V. (author) / Tiemann, R. (author)


    Publication date :

    1994


    Size :

    8 Seiten, 10 Bilder, 3 Tabellen, 4 Quellen



    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




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    System Approach to Brake Judder

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