OEM 98415096 98408706 99465078 For IVECO Heavy Duty Truck Shock Absorber Air Spring Chassis Series

Working Principle
When the truck is running, the rear wheels generate vertical displacement due to uneven road surfaces. During the compression stroke, the wheels move upward, the piston rod of the shock absorber is pressed into the shock absorber cylinder, and at the same time, the airbag of the air suspension is compressed. The air in the airbag is squeezed into the air storage tank or other storage space (if any) through the air pipeline. In this process, the pressure change of the air will generate a certain elastic resistance. At the same time, the piston in the shock absorber cylinder moves upward, and the oil is squeezed into other chambers through the valve system. The valve system generates compression damping force according to the flow rate and pressure of the oil to prevent the wheels from moving upward too quickly.
During the rebound stroke, the wheels move downward, the piston rod extends out of the shock absorber cylinder, and the airbag rebounds accordingly. Air re-enters the airbag, and the valve system controls the reverse flow of oil to generate rebound damping force to prevent excessive rebound of the wheels. Through the collaborative work of the air suspension and shock absorber, the up-and-down vibration and shaking of the rear part of the vehicle are effectively reduced, providing a stable driving posture for the vehicle.