Air suspension is fitted to all types of trucks with great success. The air springs are designed for a wide variety of applications on the front, rear and trailing axle, as well as on the leading axle of semitrailer trucks.
Air Spring vs. Steel Spring
The advantage that air-spring cab suspension has over conventional steel-spring suspension is that of a low natural frequency, which greatly enhances a commercial vehicle’s riding comfort. So-called sleeve air springs are the type normally used in truck and tractor cab suspension. Depending on space availability and the design of add-ons, they can be set up directly with the vibration damper as a one-piece spring strut or alternatively installed in parallel arrangement to the dampers.
As a rule air springs used for cab suspension are arranged as four-corner suspension between the driver’s cab and the chassis frame. In addition to improving comfort, air-spring cab suspension offers the advantage that a manufacturer can use a uniform component regardless of customer variant and equipment preferences. The air spring equalizes any force differences as may occur because of differences in cabin weight (raised roof, air-conditioning system etc.) or driving speed. It does this by means of a control valve that automatically varies the internal pressure in such a way that the driver’s cab is statically always in the manufacturer’s specified design position vis-à-vis the vehicle chassis.
Technology of the Future from ContiTech
Each LFD consists of two or three chambers depending on the application and service conditions, and unites the functions of an air spring and damper in one single component.
Designed for use in air-sprung driver’s seats and cab suspensions, LFD technology
- Geater ride comfort due to frequency-selective damping and automatic weight-related damping performance
- Low wear and a long service life
- Environmentally safer because damper fluid is not needed
- Air is used as a medium for optimum suspension and damping performance