Height control device for vehicles with air springs

摘要

The leveling system for a vehicle fitted with air springs (6a-6d), has a pneumatic controlled path valve (26) with an integr residual pressure and overpressure function. The valve (26) controls the flow of compressed air into the springs (6a-6d) using t air from a control line (20) to the inlet (24) of the valve (26). The let-off line (28), which allows air to escape from the sir springs (6a-6d), is separated from the control line (20) by the valve (26). A large air vol. can flow through the let-off line ( without a reduction in the static air pressure in the control zone (50) of the valve (26). The let-off line is blocked by a step piston (44) at the valve, when no air is to be released from the air springs.