In fact, the history of suspension is closely related to the history of shock absorber in some aspects. In this issue, i will combine the history of suspension and shock absorber along the time line to make a summary. This part of the content is very messy, i also checked a lot of materials and summarized them together, so it is inevitable that there are some mistakes or omissions in time. If some big guys know more details, welcome comments and additions.

In the previous article we talked about the popularity of modern suspension that represents "active", as we said in the first article, when you use a spring in the suspension, the linear elasticity coefficient and energy storage capacity of the spring lead to the fact that you must have a damper, and in order for the vehicle to be comfortable or sporty, the car needs to be in the skyhook or skyhook/ groundhook) state.