Handling characteristics and stability of the steady-state powerslide motion of an automobile |
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Authors: | J Edelmann M Plöchl |
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Institution: | (1) Department of Mechanical, Materials and Manufacturing Engineering, The University of Nottingham, Nottingham, NG7 2RD, UK;(2) School of Engineering and Applied Science, Aston University, Aston Triangle, Birmingham, B4 7ET, UK;; |
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Abstract: | Powerslide of an automobile may be defined as a steady-state cornering motion at a large side slip angle of the vehicle, considerably
large traction forces and a large negative steering angle of the handwheel. In this case the front wheels direct towards the
outside of the turn. As this extrem driving condition, which can be seen e.g. in Rallye sports, is hardly addressed in literature
so far, this paper investigates the respective handling characteristics. Therefore, a nonlinear four-wheel vehicle model is
applied including nonlinear tyre characteristics, the load transfer between inner and outer wheels and the influence of the
traction forces on the lateral tyre forces. A basic stability analysis reveals the unstable nature of the steady-state powerslide
motion of a certain test vehicle. To approve the numerical findings, measurements have been performed with a sports utility
vehicle with rear-wheel drive at various speeds on a wet circular test track. |
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