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在越野汽车、工程机械等非公路行驶条件下的车辆中,多数采用双桥或多桥驱动,以便获得更大的牵引力。但在高速直线行驶时,由于胎压、轴荷不同导致车轮滚动半径不等。另外,即使前后车轮半径相等,当汽车转向或作非直线行驶、或通过不平路面及凹凸处时,前后车轮将产生运动上的不协调现象,引起车轮的滑转或滑移和与行驶方向相同或相反的道路切向反作用力。 大多数汽车理论教科书对这个问题都没有详细的推导和计算。本文就这个问题进行比较详细的叙述和推导(以双桥驱动车为例)。
In off-road vehicles, construction machinery and other non-road driving conditions, the majority of double-bridge or multi-bridge drive in order to obtain greater traction. However, when driving at high speed and straight line, the rolling radius of the wheels varies due to tire pressure and axle load. In addition, even if the front and rear wheels have the same radius, the front wheels and the rear wheels will cause the uncoordinated movement of the front and rear wheels when the vehicle turns or makes a non-straight running or passes the uneven road surface and causes the wheel to slip or slip and move in the same direction Or the opposite road tangential reaction. Most automotive theory textbooks have no detailed derivation and calculation of this issue. This article on this issue for a more detailed description and derivation (double-axle car as an example).