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通过查阅相关文献,笔者发现关于汽车的牵引力问题有多种解释和看法,但这些说法大都自相矛盾,不能自圆其说.比如,看法1认为汽车的牵引力是气缸通过传动轴对轮胎施加的驱动力矩,这种解释存在一个很大的问题,即驱动力矩是内力,而内力无法改变汽车质心的平动问题.如果把汽车架空的话,纵使驱动力矩有多大,汽车依然无法前行.看法2认为牵引力是轮胎对汽车轴心的拉力,可这是一个内力,因为轴心也对汽车轮胎有个大小相等的
By referring to the relevant literature, I find that there are many explanations and opinions about the traction problem of automobiles, but most of these statements are contradictory and can not be justified.For example, in the opinion 1, the traction of a car is the driving torque exerted by the cylinder on the tire through the transmission shaft, This explanation has a big problem, that is, the driving torque is internal force, and internal forces can not change the translation of the car’s center of mass .If the car overhead, even if the driving torque how much, the car still can not move forward .Third opinion that the traction is Tires on the car’s axis of tension, but this is an internal force, because the axis of the car tires have the same size