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The development of tires traction models is very important for tire mechanics and automobile dynamics. Based on principle of thermal balance and theory of frictional melting, a new method for determining tire traction on an iced highway was presented. It was shown that the computed results could compare with the available test results. The advantages of a car with CTI-DS travelling on ice or compact snow were demonstrated in theory and in experiment. It was recommended that an automobile be operating at lower inflation pressures to increase tire traction force on the above highways.

In order to develop excellent winter tires, the friction mechanisms of a tire on ice-covered highway or express-way must be investigated. This paper presents a theoretical model for the kinetic friction coefficient of tire on ice based on three governing equations of mechanics and theory of frictional heating. The model is set up for two shapes of contact patch named elliptic and rectangular interface respectively, and it gives better agreement between the calculated and test results than the published model. How to determine the value of heat transfer into the tire is discussed in this paper.