Tires and elastic suspension elements smooth out bumps in the road. Shock absorbers, on the other hand, must suppress or weaken vibrations of the suspension and bodywork. Therefore, it is more correct to designate «vibration damper», «damper». In mass-produced vehicles, so-called telescopic shock absorbers are installed. They consist of a working cylinder in which a working piston connected to a piston rod can move up and down. The working cylinder is located in another cylinder, which serves as a kind of reservoir for the hydraulic oil of the shock absorber. With the springy movements of the wheel, the piston moves in the cylinder. The special oil set in motion is squeezed out through the valves, which slows down the movement of the piston and thereby dampens the vibrations of this wheel.
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