Justification of model for calculating the traction passability of the wheels of the all-wheel drive car (4x4) with the road

Abstract

Rational operation of existing and design of new designs of self-propelled wheeled vehicles is impossible without a theoretical analysis of their performance properties. In particular, the operation of such machines in heavy road conditions is relevant such operational properties as their traction patency. Given the fact that the operating conditions of self-propelled wheeled vehicles differ in a variety of different road conditions, the correspondence of their traction patency to such conditions will determine the efficiency of their work. The analysis of the operating conditions of all-wheel drive self-propelled machines showed that one of the factors that reduce their efficiency are restrictions on traction patency due to the occurrence of power circulation in their transmission. Therefore, the paper formulates the requirements for traction patency of self-propelled wheeled vehicles. Further, the approach to estimate the redistribution of traction forces on the wheels of self-propelled machines is justified. To establish a direct connection between the traction patency of self-propelled machines on the one hand and the processes of power circulation in their transmission on the other hand, it is proposed to link the processes of calculating the parameters of the front and rear drive wheels of the machine, taking into account the reduced inertia force of the corresponding wheels with the process of assessing the redistribution of traction forces on their wheels. In the end, the equations for calculating the parameters of traction permeability of the front and rear drive wheels of the machine taking into account the reduced inertia force of the corresponding wheels are justified and obtained.