What is the role of kingpin inversion? What is the role of the kingpin tilt

Keep the wheels in a straight line.

The main function of the kingpin camber is to make the steering wheel automatically centered.

However, the centerpin tilt is related to the speed, while the kingpin is not related to the speed. Therefore, at high speed, it mainly depends on the role of the kingpin tilting, and at low speed, it mainly depends on the role of the kingpin tilting.

The camber angle of the kingpin depends on the axle load of the front axle to ensure that the car runs in a straight line and the wheels are automatically aligned. The caster angle of the kingpin and the camber of the wheels is mainly determined by the steering knuckle. The caster angle of the kingpin can not be adjusted, and the camber error is too large to change the steering knuckle.

The function of the caster of the automobile kingpin is to maintain the stability of the car in a straight line, which can help the steering wheel to automatically return to the right, which can effectively curb the swing vibration of the steering gear, and make the steering lighter.

In the longitudinal plane of the car, the upper part of the kingpin axis is slightly tilted back, a phenomenon called kingpin caster. In the longitudinal vertical plane, the angle between the kingpin axis and the perpendicular line is called the kingpin camber angle, and its size is closely related to the high Li direction of the car and the handling performance.

The kingpin, which is the center of rotation when the steering wheel is turned on a traditional car, is traditionally a thicker pin. At present, many cars with independent suspension no longer have the element of kingpin, but in the wheel alignment, the term kingpin is still used, and it is synonymous with the steering axis of the steering wheel, that is, when the steering wheel is steering, it rotates with the kingpin as the axis.

When the car is running in a straight line, if the steering wheel is occasionally affected by an external force from the road surface (such as hitting a protruding stone), or when the steering wheel rotates slightly and deviates from the direction of straight driving, the steering wheel has the ability to automatically resume straight driving. This automatic centering effect of the steering wheel is generally referred to as the stabilizing effect of the steering wheel. This stabilizing effect of the steering wheel is ensured by the correct positioning of the steering wheel wheel, that is, the installation between the steering wheel, the kingpin and the front axle should have a certain relative position, and the positioning parameters of these steering wheels include the caster angle of the kingpin, the camber angle of the kingpin, the camber angle of the front wheel and the toe of the front wheel.

Photo by Q&A) @2019

The role of the caster angle of the kingpin is as follows:

1. If the caster angle of the kingpin is too small, when the car is driving in a straight line, it is easy to swing the front wheels, shake the steering wheel, and the steering wheel automatically return to the center is weak, and the driver will lose the sense of the road; Difficult to operate or easy to cause driver fatigue;

2. Modern high-speed automobiles are caused by the decrease of tire bending pressure, the increase of elasticity, and the improvement of torque stability. As a result, it is possible to reduce the angle to near zero or even to negative values;

3. In the medium and high-speed driving, maintain the stability and agility of the car in a straight line, appropriately increase the kingpin tilt, which can help the steering wheel to automatically return to the right, can effectively control the vibration of the steering gear, can make the steering lighter, and tilt the appropriate amount of kingpin backward can repair the driving operation.

The role of the caster angle of the kingpin is as follows: 1. If the caster angle of the kingpin is too small, when the car is driving in a straight line, it is easy to swing the front wheel, the steering wheel shakes, and the steering wheel automatically returns to the right ability is weak, and the driver will lose the sense of the road; Difficult to operate or easy to cause driver fatigue; 2. The state key shirt of modern high-speed cars is caused by the decrease of tire pressure, the increase of elasticity, and the improvement of torque stability. As a result, it is possible to reduce the angle to near zero or even to negative values; 3. Maintain the stability of the car in a straight line in medium and high-speed driving, and appropriately increase the tilt of the kingpin, which can help the steering wheel to automatically return to the center, which can effectively control the vibration of the steering gear, make the steering lighter, and tilt the kingpin backwards with an appropriate amount to repair the driving operation.