The function of automotive springs

Car suspension is the general term for all force transmission connection devices between the frame, axle or wheel of a car. Its function is to transmit forces and torque acting between the wheel and the frame, and to cushion the impact force transmitted from uneven road surfaces to the frame or body, and attenuate the resulting vibrations to ensure smooth driving of the car. A typical suspension structure consists of elastic elements, guiding mechanisms, and shock absorbers, while some structures also have buffer blocks, lateral stabilizer bars, etc. Elastic components come in various forms such as steel plate springs, air springs, coil springs, and torsion bar springs. Modern car suspensions often use coil springs and torsion bar springs, while some high-end cars use air springs.

Suspension is an important assembly in a car, which elastically connects the frame with the wheels and is related to various performance characteristics of the car. From the appearance, a sedan suspension is only composed of some rods, tubes, and springs, but don't think it's simple. On the contrary, a sedan suspension is a car assembly that is difficult to achieve perfect requirements. This is because the suspension needs to meet both the comfort requirements of the car and its handling stability requirements, and these two aspects are contradictory to each other. For example, in order to achieve good comfort, it is necessary to greatly cushion the vibration of the car, so the spring needs to be designed to be softer. However, a soft spring can easily cause the car to have adverse tendencies such as "nodding" during braking, "lifting" during acceleration, and serious left and right tilting, which is not conducive to the car's steering and can easily lead to unstable handling.