浅析轮胎偏磨与车架尺寸控制

Brief Analysis of Tire Eccentric Wear and Frame Size Control

通过对3台前轮内侧有偏磨现象的SUV汽车进行不同加载条件下的车轮跳动量测试和车轮定位参数变化的测试发现,前轮前束随车轮上跳过程变成负值,且明显偏离标准范围。通过结构分析、理论计算与实测值对比可知,车辆在负载行驶时前束值偏离是造成轮胎内侧偏磨的主要原因。可采用降低转向臂与转向拉杆下安装平面的临时措施改进;永久性改进措施为严格控制该尺寸且将纵梁定位由原来的外形定位改为侧面定位孔定位。

By testing wheel jumpout and wheel alignment parameter variation under different loading conditions of three SUVs with eccentric wear in the interior of front wheel,it is found that front wheel toe-in becomes a negative value with the jump process of wheel and deviates obviously from standard range.It is known through structural analysis,theoretical calculation and measured values that toe-in deviation when the vehicle is driven with load is the main cause to cause eccentric wear of the tires.A temporary improvement measure is to lower the mounting plane beneath the steering arm and tie rod;the permanent improvement measure is to strictly control this size.