本文使用拟合多项式描述汽车发动机负荷特性，提出结构简化的汽车速度和方向控制模型。
This paper USES polynomials to express the load characteristics of the automobile engine, and presents simplified structure velocity and direction control models.
工业上使用的大多数发动机都以恒定速度运转，而与发动机承受的负荷无关。
Most engines in industrial use are rated to run at a constant speed, irrespective of the load they carry.
对于不同应有的不同负荷和速度，可以使用不同系列的调心滚子轴承，适用于矿山、冶金、造纸、建筑等大型机械设备。
To the different load and speed, the various serious bearing can be chosen, and mainly used in the applications of follow industries: mine, metallurgy, papermaking and construction etc.
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