Static or dynamic, it supports the load
The chassis suspension—steel coil or pneumatic springs—supports the static vehicle weight when standing still, and also supports the dynamic loads during motion.
Springs and chassis are separated by a special spring isolator to keep road-surface-induced vibrations away from the bodywork and passengers. The spring isolator has to prevent noise produced by the spring and spring cup rubbing against each other. It also has to effectively dampen spring resonances and energy peaks. And it has to reduce the introduction of body noise, caused by uneven road surfaces, into the chassis.
Depending on whether they are designed to accept steel coil springs or to isolate pneumatic springs, isolators also have to absorb and isolate the bearing pressure of the spring aid and support bearing.
Cellasto® spring isolators fulfill these requirements particularly well. They reduce resonance-related energy peaks and at the same time isolate the body noise. Cellasto's compressibility also helps to reduce stress concentrations within adjacent components (particularly the spring) and prolong their usable life.
Because of their excellent fatigue strength, Cellasto spring isolators can be far softer than other elastomers used in components subject to pressure loads. This and their microcellular structure allow it to make significant improvements in the area of harshness.
Drivers are given the impression that all friction has been removed from the chassis. Furthermore, Cellasto spring isolators are characterized by high abrasion resistance, negligible creep and low compression sets.
Taken together, these physical properties make for excellent comfort throughout the entire life of the vehicle.
For specific axle designs, spring isolators can also be combined with an end stop or a spring aid to integrate vibration damping with limitation of spring travel in one component.