在使用中部分BJ212越野车前轮胎出现了异常磨损。为了摸清磨损情况和找出原因,首先进行了调查,在调查的基础上进行了分析,并进行了行驶试验,从而查明了影响异常磨损的一些因素,为今后进一步改进创造了条件。一、异常磨损情况在北京地区走访了两个使用单位,约有100辆车,出现异常磨损的占20%左右,异常磨损有横向和纵向两种,横向磨损的比例不大,绝大部分是纵向磨损(图1)。纵向磨损在胎面上的凸块呈有规律的前高后低(按汽车行驶方向)。图1中所示的轮胎只行驶7000公里,一个 Abnormal wear on the front tires of the BJ212 SUV in use. In order to find out the cause of wear and tear and to find out the reasons, firstly, the investigation was carried out. Based on the investigation, the analysis was carried out and the driving test was carried out. Some factors affecting abnormal wear and tear were found out, which created the conditions for further improvement in the future. First, the abnormal wear visited two units in Beijing, about 100 cars, there are about 20% of abnormal wear, abnormal wear and tear are horizontal and vertical, the proportion of horizontal wear is not, the vast majority are Longitudinal wear (Figure 1). Longitudinal wear bump on the tread was regular high before the low (according to the direction of the car). The tires shown in Figure 1 only travel 7000 km and one