Explanation Of The Working Principle Of A Dual Acting Cylindrical Shock Absorber

During the compression stroke, it refers to the movement of the car wheels closer to the vehicle body, causing the shock absorber to be compressed and the piston inside the shock absorber to move downwards. The volume of the lower chamber of the piston decreases, the oil pressure increases, and the oil flows through the flow valve to the chamber above the piston (upper chamber). The upper chamber is occupied by a part of the piston rod, so the increased volume of the upper chamber is smaller than the reduced volume of the lower chamber. A portion of the oil then pushes open the compression valve and flows back to the storage cylinder. These valves create a damping force for the compressed motion of the suspension by saving oil. When the shock absorber extends its travel, the wheels move away from the body, causing the shock absorber to be stretched. At this point, the piston of the shock absorber moves upwards. The oil pressure in the upper chamber of the piston increases, the flow valve closes, and the oil in the upper chamber pushes open the extension valve and flows into the lower chamber. Due to the presence of the piston rod, the oil flowing from the upper chamber is insufficient to fill the increased volume of the lower chamber, causing a vacuum to be generated in the lower chamber. At this time, the oil in the oil storage cylinder pushes open the compensation valve 7 and flows into the lower chamber for replenishment. Due to the throttling effect of these valves, they have a damping effect on the suspension during stretching motion.