Title: An experimental investigation into vehicle response during steering and braking manoeuvres

Authors: M. El-Gindy, L. Ilosvai

Addresses: Automobile Engineering Department, Budapest University of Technology, Hungary. ' Automobile Engineering Department, Budapest University of Technology, Hungary

Abstract: A study is presented of the response of a road vehicle to steering and braking manoeuvres conducted under conditions of differing tyre-inflation pressures. It is shown that the directional response of the vehicle to a given steering input is closely dependant on the front tyre-inflation pressure; rear tyre-inflation pressure, however, is shown to have no significant effect on vehicle motion. The variation of vehicle lateral acceleration produced by a fixed angle of steering input, at different vehicle speeds, with underinflated and overinflated front tyres is demonstrated. It is also shown that, during combined steering and braking, the front tyre-inflation pressures play an important role in changing the front-wheel locking sequence thus changing the vehicle|s directional stability.

Keywords: vehicle response; directional stability; steering tests; braking tests; tyre inflation pressures; lateral acceleration; yaw acceleration; oversteering; understeering; slip angles; wheel locking sequences.

DOI: 10.1504/IJVD.1981.061252

International Journal of Vehicle Design, 1981 Vol.2 No.4, pp.463 - 469

Published online: 25 May 2014 *

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