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在对限滑差速装置进行分类与选型的基础上,以摩擦片式、变传动比和托森式等限滑装置为分析对象,在虚拟环境中建立了包括前后双横臂独立悬架模型、转向系模型、传动系简化模型、轮胎模型、路面模型和车身模型的整车动力学模型。在该模型中加入限滑差速器的扭矩分配模型,对铺装路面与冰雪路面两种状态下的稳态回转、角阶跃、稳态转向急加速、稳态转向油门抬起、对开路面起步加速能力、挂钩牵引力、爬坡度等做了仿真试验,并与普通差速器做了对比。结果表明:托森式、变传动比、摩擦片式等限滑差速装置都可以明显改善车辆在对开路面上的牵引通过性,还可以增加车辆稳态回转的不足转向趋势。其效果显著性排序为:托森(变传动比)式、摩擦片式和普通差速器。
Based on the classification and selection of the limited-slip differential gear, the friction-type, variable transmission ratio and Torsen-type limit slip devices were taken as the object of analysis. In the virtual environment, Model, steering system model, drive train simplified model, tire model, road model and body model of the vehicle dynamics model. In this model, the torque distribution model of the limited slip differential is added. The steady state rotation, angular step, steady steering and rapid acceleration under paved pavement and ice and snow pavement are raised. Pavement start acceleration, hook traction, climbing and other simulation tests done and compared with the ordinary differential. The results show that Torsen type, variable transmission ratio, friction plate and other limited slip differential devices can significantly improve the traction of the vehicle on the open road surface, and can also increase the steering tendency of the vehicle steady-state rotation. The significance of the sort order: Torsen (variable transmission ratio) type, friction-type and ordinary differential.