关键词: 乘用车；操纵稳定性；性能优化；悬架参数；横向稳定杆

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