Air Springs Explained | Vibracoustic - LinkedIn

Do you know the secret behind the comfort, yet sporty characteristics of premium cars? It might be to one part our air springs, which do not only increase driving comfort but also the aerodynamics by reducing wind resistance. This is achieved with the leveling function of our air springs. While gaining speed, car heights or rather ground clearance is reduced, and the front winds swiftly glide over the car instead of building up in front. This gives the vehicle sportier driving characteristics. The good thing is, you don’t have to decide for either comfort or sportiness. With our thoroughly engineered, finely tuned and manufactured air springs you can have both in one. The same principle is applied by our engineers to improve indirect battery cooling of battery electric or plug-in hybrid vehicles by re-directing the airflow to where it is needed most.   #drivingcomfort #airsprings #NVH #innovation #technology 

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Air spring applications at the rear axle or on both axles are becoming increasingly popular for electric vehicles. Air springs enable to control the levelling of the car. This enables optimized aerodynamics at high speeds as well as airflow guidance beneath the car. The latter is especially important for electric vehicles, since it facilitates the efficient passive cooling of battery packs, which are predominantly positioned in the floor area Besides that the air springs support to keep a minimum ground clearance to secure the batteries in bad road conditions.

Concept of the three-chamber air spring system: The larger the available air volume, the softer the springs; the smaller the air volume, the stiffer the springs. Vibracoustic switchable air springs allow the stiffness of springs to be doubled over four gradients – from very soft to extremely stiff.

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To enable this, Vibracoustic switch valves control the air flow rates and their openings need to be adequately sized for the correct amount of air to pass. The switching times also need to be short enough to enable stiffness switches to be made at speed. To ensure that switching noises are not perceptible by passengers, an optimized membrane is used. This feature is particularly important for electric vehicles, where there is no combustion noise or vibration from the motor to mask this type of noise.

To build the new geometries of the air spring, including the straightforward creation of air volume chambers, Vibracoustic uses an innovative hot gas welding manufacturing process for the air spring top pot. This allows more efficient use of the limited packaging space in the suspension area by combining various plastic and aluminum parts. The result is a weight reduction of the top pot by up to 30%.

Switchable dual-chamber air spring systems are also possible. They only offer two different stiffness levels, but still enable effective roll stabilization and are therefore a cost-efficient system to meet customer demands for improved comfort and driving dynamics in high- and medium-segment vehicles.

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