An experimental study of wheel movement arising fiom compliance in the front suspension and steering system of a passenger car during braking is presented. Using a Kinematic and Compliance (K&C) test rig, movement of the front wheels and the suspension sub-frame, together with corresponding changes in suspension/steering geometry under simulated braking conditions, were measured and compared with dynamic measurements of the centre points of the front wheels. The resulting knowledge of front wheel deflections has enabled the causes and effects of steering drift during braking to be better understood in the design of front suspension systems for vehicle stability. The major cause of steering drift during braking has been found to be side-to-side dynamic variation in the deformation and deflection of suspension and steering components, and not side-to-side variation in brake performance. The research results presented in this paper confirm that finding, and give more insight into this complicated phenomenon, emphasizing that steering drift during braking is an issue at the system level and not merely component level. The phenomenon cannot be addressed in terms of any single design characteristic of the vehicle suspension or brake system design. It can be concluded that a fully integrated dynamic model of the vehicle chassis will be a most valuable tool in chassis system design for stability.


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    Title :

    Wheel movement during braking


    Additional title:

    Untersuchung der Radbewegung während des Bremsens


    Contributors:
    Klaps, J. (author) / Day, A.J. (author)


    Publication date :

    2002


    Size :

    12 Seiten, 13 Bilder, 1 Tabelle, 4 Quellen



    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




    Wheel movement during braking

    Klaps, J. / Day, A. J. / Institution of Mechanical Engineers | British Library Conference Proceedings | 2002




    Steering drift and wheel movement during braking: parameter sensitivity studies

    Klaps,J. / Day,A.J. / Ford Motor,BE et al. | Automotive engineering | 2003