The paper shows that, during abrupt wheel torque transients for ice surface and low vehicle speeds, the tyre can develop significantly larger longitudinal force than the peak value of the tyre static curve. This so-called dynamic tyre friction potential (DTFP) effect has many influencing factors such as the rate of change of the wheel torque, the vehicle speed, and the tyre dwell time. The paper presents a detailed analysis of the DTFP behaviour based on the experimental data collected by using an in-wheel motor-based tyre test vehicle. The analysis results and an insight into the brush structure of a tyre model lead to the hypothesis that the different influencing factors may be predominantly explained by the bristle dwell time (BDT) effect. Following this hypothesis, the LuGre model of the tyre friction dynamics is extended with a physical BDT sub-model. The experimental validation results show that the proposed model can accurately capture the low-speed tyre–ice friction behaviour during abrupt wheel torque transients.
Tyre friction behaviour under abrupt wheel torque transients on slippery road surfaces: experimental analysis and modelling
Vehicle System Dynamics ; 49 , 10 ; 1623-1647
2011-10-01
25 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
Experimental analysis and modelling of longitudinal tyre friction dynamics for abrupt transients
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