What are the physical functions of springs in shock absorbers

The existence of shock absorber system, 1. In order to cushion the uneven road surface and make driving more comfortable; 2. It is to keep the tire in contact with the ground when driving on uneven roads. For players, the only purpose of refitting the shock absorber system is to improve the handling. Let’s talk about the spring before we talk about the shock absorber. It’s easier for us to understand the shock absorber system.
Working principle of spring
Because there are so many things in this part that we don’t need to understand, I try to use the simplest words to express the core of the principle. The most common spring used in the suspension system is the coil spring, which is easy to make, high performance and low price. In the traditional spring shock absorber design, the spring plays the role of supporting the body and absorbing the impact of uneven road surface and other forces on the tire, including acceleration, deceleration, braking, turning, etc. More importantly, in the process of eliminating the vibration, it is necessary to maintain the continuous contact between the tire and the road surface and maintain the tracking performance of the car. How to improve the continuous contact is the primary consideration of refitting and adjusting.
The spring itself can be divided into hard and soft parts according to the material of manufacture. When refitting, if too hard spring is used, another car will shoot up when encountering uneven road surface, and friction force between tire and ground will be lost; if too soft spring is used, it will be easy to be compressed, making shock absorber travel exhausted, and easy to lose tracking when turning. Therefore, the choice of spring depends on the road surface used: the smoother the road surface, the harder the spring can be used, and the more bumpy road surface, the softer but longer travel spring should be used. There is another kind of “progressive spring”, which can increase the coefficient of elasticity with the compression of the spring. However, due to the difficulties in manufacturing, it is not common, so I will not talk about it here.