This paper analyses changes in body geometry and related wheel geometry which may affect the wear of passenger car tyres. By means of an electronic device, changes were measured in the position of the spots that best reflect the changes of the body geometry. This included the front bench attachment, front suspension and rear suspension, at the beginning of the front stringers, at the end of the rear stringers, around the bulkhead, as well as the top mounting points of the McPherson struts. Changes were also identified in geometrical values for the suspension and steering system. The analysed parameters of wheel geometry included, among others, toe-in, inclination angles for all the wheels, camber and castors for front wheels, etc. Tire wear was characterized by the tyre tread size in the inner, middle and outer parts of all four vehicle wheels. Based on the results obtained, quantitative relationships were identified between the mileage of the vehicle, changes in the body geometry, changes in the suspension and steering system geometry, tyre wear and the coefficient of non-uniformity in tyre wear. It was concluded that changes in car body geometry were strictly correlated with vehicle mileage. These changes, in turn, directly influenced changes in wheel geometry which, apart from influencing vehicle safety, also contribute to excessive tyre wear.

本文分析了可能影响乘用车轮胎磨损的车身几何形状和相关车轮几何形状的变化。借助于电子设备，测量了最能反映人体几何形状变化的斑点位置的变化。这包括前板凳附件，前悬架和后悬架，前纵梁的开始，后纵梁的末端，围绕舱壁的位置以及麦克弗森撑杆的顶部安装点。悬架和转向系统的几何值也有所变化。所分析的车轮几何参数除其他外包括所有车轮的前束，倾斜角度，前轮的外倾角和脚轮等。轮胎磨损的特征在于所有内，中，外部分的轮胎胎面尺寸四个车轮。根据获得的结果，确定了车辆的行驶里程，车身几何形状的变化，悬架和转向系统几何形状的变化，轮胎磨损以及轮胎磨损不均匀系数之间的定量关系。结论是，车身几何形状的变化与车辆行驶里程密切相关。这些变化继而直接影响车轮几何形状的变化，这些变化除了影响车辆安全性之外，还导致轮胎过度磨损。结论是，车身几何形状的变化与车辆行驶里程密切相关。这些变化继而直接影响车轮几何形状的变化，这些变化除了影响车辆安全性之外，还导致轮胎过度磨损。结论是，车身几何形状的变化与车辆行驶里程密切相关。这些变化继而直接影响车轮几何形状的变化，这些变化除了影响车辆安全性之外，还导致轮胎过度磨损。