Shock Absorber

The shock absorber demand is that the springs can’t immediately stabilized, that is to say after the spring is compressed and then let go, it will last for a period of time stretch and shrink, so the shock absorber can absorb the shock caused by uneven road encounter, make the ride comfort.

Suspension is the first step for most people to refit, and the suspended modification is usually started by replacing a hard shock absorber.

The main function of the spring is to eliminate the vibration of the row through the uneven pavement.

Since there is a spring that can remove the vibration, what is the shock absorber for?

The shock absorber is not only used to support the weight of the car, but also to suppress the shock of the rebound after the spring suction and the energy that absorbs the impact of the road.

If you ride car which damper is broken, you can experience the fallout of the car bouncing through each pothole, ups and downs, and the shock absorber is used to suppress such bounce.

Without shock absorber will be unable to control the rebound spring, car encounter rugged road surface will produce serious bouncing, at the corner will be because of spring under the vibration caused by the loss of the tire grip and traction.

The ideal condition is to use a shock absorber to limit spring bounce to one time.

When we compress or stretch the shock absorber at a fixed speed, the resistance is called damping. The resistance comes from that when the shock absorber moves, the piston will pressurize the damping oil to make it pass through the valve with small aperture. If we change the diameter of the valve, we can change the damping.

In Japan, the JASO C602 stipulates that the magnitude of the drag on the actuating speed 0.3m/s is the performance of the shock absorber.

We call it the damping coefficient, the unit is Kgf, and the so called hard shock absorber can produce larger resistance when actuating. When we let the shock absorber be compressed or stretched at a very slow speed, its resistance is only from the internal friction of the mechanism, and the damping oil almost does not produce resistance.

But when the dynamic speed increases, the increase of drag will be directly proportional to the square of the velocity of the shock absorber. That is to say, when the working speed increases to 2 times, the resistance will increase to 4 times.

The shock absorber resistance can be divided into two parts of compression and rebound, compression resistance and spring stiffness has an additive effect when the actuator can increase the strength of the spring, and the rebound resistance is affected by the rebound after the shock compression stroke, this is the biggest reason for the existence of the shock absorber,

which is used to resist the spring compression after the tire pressure to the ground forces, slow rebound shock and keep the vehicle stable.