Abstract: Handling stability directly affects vehicle safety and driving experience. To address issues identified in real-vehicle testing–including insufficient suspension support, excessive roll angle, delayed steering response, and poor steering returnability–this paper takes a specific passenger car as the research object. Based on the Controllability and Stability Test Method for Automotive Vehicles (GB/T 6323－2014), the handling stability-related parameters are calibrated through steady-state circular tests, steering wheel step input tests, steering returnability tests, and slalom tests. The suspension springs, shock absorbers, anti-roll bars, and steering system are identified as the optimization targets. Relevant parameters are adjusted, and the optimization effects were verified through repeated tests under identical conditions. The results show that the handling stability indicators are significantly improved. The optimization scheme proposed in this paper features low cost, short cycle time, and high versatility, which can provide a reference for the handling stability design and performance improvement of passenger cars and offer guidance for overall vehicle development.

Key words: passenger car; handling stability; performance optimization; suspension parameters; anti-roll bar

摘要： 操纵稳定性直接影响汽车的安全性和驾驶操纵体验。针对实车测试中出现的悬架支撑 力不足、侧倾角度过大、转向响应滞后和转向回正性能欠佳等问题，文章以某款乘用车作为 研究对象，以《汽车操纵稳定性试验方法》（GB/T 6323－2014）为依据，通过稳态回转、转 向盘转角阶跃输入、转向回正、蛇行等试验完成操纵稳定性相关参数标定，明确了以悬架弹 簧、减震器、横向稳定杆及转向系统作为本次试验的优化对象。调整相关参数，并通过相同 条件下重复试验验证优化效果，得出操纵稳定性指标有显著的提升。文章所述的优化方案具 备了成本低、周期短、通用化高的特点，可以为乘用车操纵稳定性设计和性能提升提供参考， 对整车开发具有指导意义。

关键词: 乘用车；操纵稳定性；性能优化；悬架参数；横向稳定杆