"The four-wheel alignment of a car refers to the steering wheel of the car、The installation with a certain relative position between the steering knuckle and the front axle is called steering wheel alignment。Since the front wheels of most vehicles are steering wheels，So it is also called front wheel alignment。

The parameters that ensure that the steering wheel (front) wheel can automatically return to alignment after steering are kingpin caster and kingpin inclination，The following will focus on introducing these two parameters and analyzing how the automatic back-aligning effect is generated。

Power steering will adjust the steering feel according to the speed of the car，For example, the normalizing force should be reduced at low speed，The return angle gain needs to be increased，The normalizing force becomes larger at high speed，Angle gain needs to be reduced。

The car no longer has the tracking ability of "pursuing a straight line"，And only drive according to the seabet iocurrent angle of the steering wheel，In this case, you need to constantly correct your direction。

Supermarket shopping cart，The axles of the four wheels of the shopping cart are biased to one side of the wheel，This is also to make it easier for the shopping cart to go straight，When we need to turn, we need to spend much more energy to make it turn。"(The content of the article comes from the Internet，If copyright is involved, please contact)