Steering system forces due to local camber in ruts
by J. Jarlmark
International Journal of Vehicle Design (IJVD), Vol. 40, No. 1/2/3, 2006

Abstract: A driver related area that is difficult to simulate and to reproduce in a driving simulator is the steering feel, especially the sense of longitudinal ruts and the self-steering of the vehicle. The hypothesis that the major contribution to the steering feel is due to the lateral movement of the vertical force due to local camber changes is stated. A tyre measurement rig is developed and described. Measurements are taken of the lateral movement of the vertical tyre force and presented for two different tyres. The original hypothesis is proven to be false by computer simulations using the measurements from the rig. Instead the aligning moment created by the tyre belt stiffness for a cambered tyre is shown to have the largest significance on a steering system of modern layout.

Online publication date: Wed, 21-Dec-2005

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