Compression stroke and damping force of the rear shock absorber bump stop

- May 14, 2019-

Rear shock absorber bump stop is widely used in the car suspension system is the barrel damper, and both the compression and the extension stroke can be used for vibration reduction, called the two-way action damper, and the new type of vibration reduction The utility model comprises an inflatable damper and a resistance adjustable damper.


The working principle of the rear shock absorber bump stop bidirectional action cylinder damper. In the compression stroke, the vehicle wheel is moved closer to the vehicle body, and the damper is compressed, at which time the piston inside the damper moves downward. The volume of the lower chamber of the piston is reduced, the oil pressure is increased, and the oil flows through the flow valve to the chamber (upper chamber) above the piston. The upper chamber is occupied by a part of the piston rod, so that the increased volume of the upper chamber is smaller than the volume of the lower chamber, and a part of the oil then pushes the compression valve back to the storage tank.


The rear shock absorber bump stops the oil savings of these valves to form a damping force for the compression movement of the suspension. When the damper is in the extension stroke, the wheel is equivalent to being away from the vehicle body, and the damper is stretched. At this time, the piston of the damper moves upward. The oil pressure in the upper chamber of the piston rises, the circulation valve closes, and the oil in the upper chamber pushes the extension valve into the lower chamber. Due to the existence of the piston rod, the oil flowing from the upper chamber is insufficient to fill the increased volume of the lower chamber, and the main chamber generates a vacuum degree. At this time, the oil in the storage cylinder pushes the compensation valve into the lower chamber to be replenished. . Due to the throttling action of these valves, the suspension acts as a damping force during the extension movement.