& quot; The four -wheel positioning of the car refers to the rotary wheel of the car、Installation with a certain relative position between the steering section and the front axle is called a steering wheel positioning。Since the front wheel of most vehicles is a steering wheel，So also known as the front wheel positioning。

Make sure that the parameter that can automatically return to the rotor (front) wheel (front) wheel is the main sales backward leaning and the main sales of the main sales，The following focuses on these two parameters and analyzes how to generate automatic return.。

Steering help will adjust the feel of steering with the speed of the car，For example, if you reducing your strength at low speed，Back to the positive angle gain to become larger，and the right back of high speeds will become larger，The angle gain should be reduced。

The car has no trace of "pursuing straight lines"，Drive only according to the current angle of the steering wheel，In this case, you need to constantly correct your direction。

Supermarket shopping cart，The four wheels of the shopping cart are all biased towards the wheels，This is also for shopping cars to be easier to go straight，When we need to turn around。& quot;