The BMW refit shop introduced that the spring mainly plays a role in linking the handling. The essence of modifying the car spring is to improve the handling. Generally, the springs that are harder or shorter are replaced. The springs control many factors related to control. The change of the spring It will cause a very complex change in handling characteristics.
In terms of stiffness, the rolling resistance of the suspension can be improved and the rolling of the body during cornering can be reduced. The lowering of the car height can simultaneously lower the center of gravity of the body, reduce the transfer of body weight when cornering, and improve stability. And the reduction of the car height can also take into account the aesthetic effect.
Second, the basic functions of the spring:
The BMW tuning shop introduced that one is to serve as a buffer between the suspension system or the chassis and the ground, that is, to maintain comfort, and the other is to keep the tires on the ground when the car is running on uneven roads.
3. Explanation of mainstream springs - progressive springs:
The BMW tuning shop tells everyone that in order to better realize the basic function of the spring, a nonlinear spring with a compound elastic coefficient, also known as a progressive spring, will be used. Progressive springs can increase the spring rate as the spring compresses, and require a high degree of skill in design and manufacture. When traveling on bumpy roads, the spring rate will increase to maintain the stability of the body.
The current progressive springs are mostly unequal-pitch springs or springs with variable coil diameters. When the unequal-pitch springs are compressed, local line-to-line contact will occur, so that the effective number of turns will change, resulting in changes in the elastic coefficient K. The change of the upper and lower ring diameters is the Z direct method of changing the elastic coefficient.