The stability and yaw control systems in today's vehicles are increasingly appreciated for active safety. They use individual wheel braking to obtain an extra yaw moment. Adding individual traction, e.g. through electric wheel motors, would increase the available extra yaw moment. The present work investigates the maneuverability potential of such a concept. A passenger car employing electric wheel motors at the rear axle is compared with the same vehicle using only brake intervention. The potential, or ultimate limits, are investigated for two driving situations. The time delay in yaw speed change when entering a curve is estimated. A reduction of some 10-30 per cent is found, the highest gains being at low longitudinal speed. For pure lateral translation, the maximum initial lateral acceleration is estimated and a 40 per cent increase is predicted. The investigation is based on mathematical analysis employing a modified version of the common bicycle model. The feasibility of introducing these solutions in series-produced vehicles is discussed briefly. Cost aspects are not considered in any great detail, but it is emphasized that such aspects must be weighed not only against improved maneuverability but also against reduced environmental impact and improved longitudinal driveability, all of which are attainable with electric propulsion.


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    Title :

    Potential of electric wheel motors as new chassis actuators for vehicle manoeuvring


    Contributors:


    Publication date :

    2002


    Size :

    10 Seiten, 9 Quellen



    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English






    Potential of electric wheel motors as new chassis actuators for vehicle manoeuvring

    Jacobsen,B. / Chalmers Univ.of Technology,SE | Automotive engineering | 2002


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