Stiffness Characteristics of Air Spring

In the slow working state, such as parking when the staff on and off, etc., the air spring internal air temperature will remain unchanged, equal to the ambient air temperature, so the gas state changes close to the isothermal process. When the vehicle is running, the air spring moves more rapidly due to the vibration of the road roughness, and the heat generated by the internal gas does not have enough time to exchange heat with the outside air, so the change of the gas state is close to the adiabatic process.

Damping characteristics of air spring

The damping of the air spring itself mainly includes the damping caused by the deformation of its own structure during vibration and the friction damping caused by the relative movement of the piston and the cylinder. Damping smaller. To achieve a greater damping effect, you can increase the additional chamber. And an orifice is provided between the two to create a large viscous damping when the gas flows between the body and the additional chamber. Change the opening of the orifice by setting the throttle valve. You can adjust the size of the damping. When the throttle valve is completely closed, the main and auxiliary air chamber does not flow, then the air spring damping only its own structural deformation damping and piston and cylinder friction damping, damping force is small; when the throttle in a certain When the opening degree, the air flows between the main and auxiliary air chambers, resulting in a certain degree of viscous damping. At this time, the damping value of the air spring is larger. When the throttle valve is fully opened and the orifice is the largest, The chamber is fully connected as a whole, the gas of the main air chamber can flow smoothly with the gas of the additional air chamber, and the orifice is basically not damping, and the damping of the air spring is still the damping of the body itself, and the damping value is small.