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为保证汽车稳定的直线行驶,应使转向轮具有自动回正作用,即当转向轮在偶然遇到外力(如碰到石块)作用发生偏转时,在外力消失后能立即自动回到直线行驶的位置。这种回正作用是由转向轮的定位参数来保证实现的。前轮前束就是这些定位参数中的一种。 为了消除车轮外倾带来的不良后果,在安装车轮时,使汽车两前轮的中心面不平行,两轮前边缘距离小于后边缘距离,
In order to ensure the stable running of the car, the steering wheel should be provided with the function of automatic return, that is, when the steering wheel is deflected by accidental external force (such as bumping into the stone), the steering wheel automatically returns to the straight line immediately after the external force disappears s position. This back to the role of the steering wheel by the positioning parameters to ensure that achieved. The front toe-in is one of these positioning parameters. In order to eliminate the adverse consequences brought by the wheel camber, when installing the wheel, the center plane of the two front wheels of the car is not parallel, and the distance between the two front edges is less than the distance between the rear edges.