23467662 23152718 Rear Air Suspension For Cadillac XTS

Product Technical Information Reference

The function of shock absorber air suspension air bag

1. Alleviate the volume change of the hydraulic chamber caused when the inner rod moves!

Point ①:

Although the inner rod is relatively thin, the liquid cannot be compressed. After the inner rod is pressed in, the small amount of the inner cavity volume is enough to generate high pressure, which is a leak of shock absorber oil! Generally, the shock absorption of civilian vehicles is by not filling the hydraulic chamber, and retaining a part of the gas to adapt to this volume change. However, when the shock absorber moves violently, the gas may cause bubbles in the hydraulic oil. When the bubbles pass through the piston, vibration and instability will occur. Stablize! Using an air bag can not only alleviate this volume change through contraction, but also separate the oil and gas to prevent the shock-absorbing oil from producing bubbles that affect the shock-absorbing effect!

2. The anti-air travel effect enables hydraulic damping to work better!

Point ②:

If there is no air bag, when the shock absorber compresses quickly, a vacuum is likely to be generated in the space under the piston. When the shock absorber rebounds, there will be no damping in the section of the stroke where the vacuum is generated, which affects the shock absorbing effect. , this area is called "empty travel". This situation does not matter much in civilian cars, but it is a big problem when used in racing cars where the shock absorbers require high-speed and violent movements! The air bag shock absorber is filled with high-pressure gas, which greatly increases the air pressure in the hydraulic chamber. It can effectively avoid the "empty stroke" of vacuum generated at the lower end of the piston during shock absorber compression, thus improving the shock absorbing effect!

If explained using hydraulic principles: liquid is incompressible (ideal state), but gas can be compressed. This provides a longer compression stroke. Moreover, the pressure of gas is easy to adjust. The reason for using nitrogen is of course because the pressure changes less with temperature. There should also be a piston between the oil and gas, or the gas may be contained in an elastic air bag, which can be large or small like a balloon. I haven’t taken it apart and looked at it, experts shouldn’t laugh at it.

In fact, when changing the oil of an ordinary front shock absorber, the oil is not filled up, and there is still some space left. This part of the air is in a closed environment and also participates in the work. It's just that it's not relatively isolated from the oil, so the effect may be worse, and it doesn't have the adjustment function. Just make a simple modification and add a valve core. I guess it should be fine to pump air inside.

Product Related OEM Number

22778104 , 22907781

23116448 , 23126011

23152718 , 23467661

23467662 , 84104205

84252216 , 84252215
 

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