What is the main function of kingpin inclination?

[OLondon]

The function of kingpin inclination is to enable the wheels to automatically return to the correct position after steering and to make steering easier. Below is an extended introduction to the kingpin: 1. The kingpin is the pivot point for the steering wheels in traditional automobiles, typically a thick pin. 2. In the lateral plane of the vehicle, the upper end of the kingpin axis is slightly inclined inward, a phenomenon known as kingpin inclination. In the lateral vertical plane, the angle between the kingpin axis and the vertical line is called the kingpin inclination angle, the value of which is closely related to the vehicle's steering and handling performance. Currently, many independent suspension vehicles no longer have the kingpin component, but in wheel alignment, the term 'kingpin' is still used as a synonym for the steering axis of the steering wheels, meaning that when the steering wheels turn, they rotate around the kingpin axis.