Generally speaking, whether a car drifts at high speed is mainly related to the following two factors:
1, caster angle of front wheel kingpin
The caster angle of kingpin refers to the angle between the vertical axis and the vertical direction when the wheel rotates.
The greater the caster angle of the kingpin, the stronger the performance of the car to keep running in a straight line, which gives the driver the most obvious feeling that the car is running more smoothly. Moreover, the greater the caster angle of the kingpin, the heavier the steering wheel of the vehicle, the slower the reaction speed of the front part of the vehicle when driving in the direction, and the more stable it will feel when driving at high speed.
However, the caster angle of some car owners is too small, which makes the steering wheel light and sensitive. When driving at high speed, the front of the car will swing from side to side immediately, giving people a feeling of uncontrollable.
2. Hardness of suspension system
The higher the vehicle speed, the worse the stability. For example, the same bumpy road surface will cause the car body to fluctuate more violently when driving at high speed, and the same lane change action will make the car body roll more obvious when driving at high speed.
Some cars emphasize comfort, long suspension stroke, small damping and soft spring. Such a suspension system can fully absorb the impact and vibration of the road surface and make the ride more comfortable.
However, when this kind of suspension encounters uneven road surface or lane change at high speed, the action range is larger and lasts longer, just like taking a boat, giving people a feeling of lightness and unconsolidation.
However, some automobile suspension systems are hard, with short suspension stroke and large shock absorption and damping. Although the comfort is poor, the support for the car body is more in place and the feeling is more stable when driving at high speed. It is not easy to feel "floating" when running. Whether it floats at high speed has a certain relationship with the vehicle's own weight, but it is mainly related to the performance orientation of the vehicle suspension system. The more comfortable the vehicle is, the greater the possibility of high-speed drift. The more sporty the car, the less likely it is to drift at high speed.