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离去角是汽车通过性能的一个很重要的参数,双轴汽车的离去角明显易得,对三轴汽车而言,其离去角就不是双轴汽车那样简明的几何关系。本文在对汽车驶离坡道时车尾运动轨迹进行分析的基础上,以具有倒置式钢板弹簧的三轴汽车和装有摆臂式平衡悬架的三轴汽车为例,推导出求解三轴汽车离去角的通用公式。文中还提出了在三轴汽车总布置图上绘出离去角的作图方法。
The departure angle is a very important parameter for the passing performance of a car. The departure angle of a biaxial car is obviously easy to obtain. For triaxial cars, the departure angle is not as simple as that of a biaxial car. In this paper, based on the analysis of the vehicle’s tail movement trajectory when the car leaves the ramp, taking a tri-axial car with inverted leaf spring and a tri-axial car equipped with a swing arm balance suspension as an example, General formula for departure angle. The article also proposed the drawing method of drawing departure angle on the three-axle car layout map.