双前桥重型汽车轴间距及操纵稳定性分析

Analysis of the wheelbase and steering stability of of the heavy-duty automobile with the double front axle

分析了双前桥重型汽车轴间距与轮胎载荷的关系,建立了双前桥重型汽车平面运动微分方程,得到该车型稳态横摆角速度增益和稳定性因素表达式;提出了保证轮胎均载和整车具有不足转向特性应满足的条件;分析结果为双前桥重型汽车轴距合理布置提供了理论依据。

The analysis method of automobile dynamics is used to analyze the relation between the wheelbase of the heavy-duty automobile with the double front axle and the load of the tires. The differential equation of planar motion of the automobile is established. The expressions of the steady state yaw rate gain and the stability factor are given. Also presented are the condition under which the average load of the tires can be achieved and the condition under which the whole vehicle has the performance of deficient turning. An application example is shown. The results provide a theoretical basis for the reasonable design of the wheelbase of heavy-duty automobiles with the double front axle.