THEORETICAL APPROACHES TO RESEARCH THE ROLLING PROCESS OF THE DRIVEN WHEEL SIDE DRAWER ON A WINTER ROAD
The stability of the movement of motor vehicles in the cold season is ensured by the ability of car tires to create lateral reactions on winter roads. The lateral adhesion of the tire to the support surface is evaluated by its lateral withdrawal characteristics, which determine the coefficient of lateral adhesion and the critical angle of the tire withdrawal. With the use of chemical deicing materials, the coupling properties of tires have significantly deteriorated, especially in the lateral direction. The lack of knowledge about the processes of movement of a tire with lateral withdrawal on a winter road covered with chemical deicing materials determines the relevance of scientific research. The article discusses the non-stationary characteristics of the lateral withdrawal of Amtel NordMaster175/70R13 passenger friction tires, obtained from the results of their tests on a winter public road covered with rolled snow and sand-salt mixture. The graphs show that the use of sodium chloride reduces the lateral grip of friction tires and the stability of motor vehicles. Purpose - obtaining non-stationary characteristics of lateral withdrawal of passenger friction tires on a road covered with rolled snow and sand-salt mixture, and estimated parameters of lateral traction. Methodology: a road test method using the methodology and tire tester developed by the author to study the unsteady lateral withdrawal of automobile tires. Results: The unsteady characteristics of the lateral withdrawal of Amtel NordMaster 175/70R13 passenger friction tires were obtained, the coefficients of lateral adhesion and critical withdrawal angles were determined. Practical implications: the obtained results are necessary to correct the mathematical model that allows performing an analytical study of the processes of lateral withdrawal of automobile tires on roads with winter slipperiness.