基于制动能量回收导致轮胎偏磨损的轮胎定位优化

Tire Alignment Optimization Considering Uneven Tire Wear due to Brake Energy Recovery

针对电动汽车耐久性能路试出现的轮胎偏磨损问题,采集制动能量回收对应的制动力矩,基于双横臂悬架的Kinematic&Compliance曲线计算制动力与前束的关系曲线。结果表明:电动汽车采用制动能量回收模式会增大制动力,减小前束值;减小前束值会加剧轮胎内侧偏磨损。补偿基于侧滑机理设定的前束值后电动汽车耐久性能路试结果表明,行驶5.5万km后轮胎的最大偏磨损量仅为0.65 mm,解决了由于电动汽车制动能量回收产生的制动力增大而引起的轮胎偏磨损问题。

Aiming at the problem of uneven tire wear in the durability road test of electric vehicle,the braking torque corresponding to braking energy recovery was collected,and the relationship curve between the braking force and the toe was calculated based on the kinematic&compliance curve of the double wishbone suspension.The results showed that using energy recovery mode could increase the braking force and reduce the toe value.At the same time,reducing the toe value could aggravate the inner side uneven wear of the tire.The durability road test results of the electric vehicle after compensating the toe value set based on the side slip mechanism showed that,the maximum uneven wear of the tire after driving 55000 km was only 0.65 mm,which solved the problem of uneven tire wear caused by the increase of braking force due to the braking energy recovery of the electric vehicle.