Analysis of commercial vehicle handling stability based on suspension inherent parameters

LIU Hui; YAN An; HAN Zhen

doi:10.19471/j.cnki.1673-6397.2025.01.008

Abstract：In order to improve vehicle handling stability,the factors affecting vehicle handling stability are analyzed,the optimization measures such as reducing the height of front suspension parameters,adjusting the shape and structural size of the transverse stabilizer bar,and reducing the height of the steel plate spring in no-load condition are adopted.Based on ADAMS/Car software,a full-vehicle dynamics model is created to simulate and analyze the handling stability the vehicle before and after the optimization of front suspension parameters,lateral stabilizer bar,and rear suspension parameters under steady-state cornering conditions and steering wheel angle step conditions.The simulation results show that by using the optimization scheme of adjusting the diameter of the stabilizer bar's radial section,the absolute value of the difference between the front rear axle side slip angles under the vehicle's steady-state cornering condition is greater than 0° as the lateral acceleration increases,and the vehicle does not show oversteer,which reduces the risk of vehicle lateral skidding or tail wagging and improves the handling stability of the vehicle.The response time of the yaw angular velocity under optimal optimization scheme steering wheel angle step condition is 0.24 s,and the peak response time is 0.51 s,which meets the industry requirements.