A system is provided for use on large vehicles of the type wherein the vehicle frame (12) is supported on vehicle axle assemblies (14, 20, 22) through air bags (26, 30, 32), and each air bag has a lower end coupled to the lower end of an arm such as a swin...

A vehicle height adjustment device for a transportation vehicle with air suspensions for front and rear wheels (1 and 2), respectively, has vehicle front and rear height sensors (9 and 10) for measuring the vehicle front and rear heights, respectively, veh...

The method involves checking in electronics (10) whether the level regulator (5-10) has been operating in the same direction for a defined period or for a defined number of control actions and checking whether the vehicle speed is below a threshold. If so,...

The system is designed so that the connecting means is throttle free. The connecting means (20-23, 31) includes a first valve (31) esp. a solenoid valve. The first valve (31) is a 2/2 way valve, which in a first control setting (31b) allows passage and in ...

Level of body frame relative to a reference point, is determined prior to discharge operation. Discharging of fluid is actuated, if the vehicle is above predetermined level. The fluid discharge operation is interrupted, when the actual lowering of body fra...

A vehicle air suspension system includes a control unit 32 which is arranged to measure the level of articulation of the two axles 18, 20 and, if it exceeds a certain level, to open respective interconnections 34, 36 between the suspension units 24 on oppo...