| 摘要 |
The invention relates to a compressed air supply system for operating a pneumatic system, in particular an air suspension system of a motor vehicle, comprising: a compressed air feed (1); a compressed air connection (2) to the pneumatic system (90); a ventilation connection (3) to the surroundings; a pneumatic main conduit (60), which has an air drier (61) between the compressed air feed (1) and the compressed air connection (2); a ventilation conduit (70) between the compressed air connection (1) and the ventilation connection (3); a magnetic valve arrangement (80) comprising a control valve (81, 81', 82") for controlling a ventilation valve (71), the control valve (81, 81', 82") being connected to a control valve connection (X2, Y2) in a pneumatic control conduit (110) that is connected to a pressure control connection (71S) of the ventilation valve (71), and the ventilation valve (71) being connected to a ventilation valve connection (X1, Y1) in the ventilation conduit (70). According to the invention, a pressure-maintaining, pneumatic device (120) is connected to the, in particular in the pneumatic control conduit (110) and is designed to maintain the pressure control connection (71S) under control pressure when the ventilation valve connection (X1, Y1) of the ventilation valve (71) in the ventilation conduit (70) is open, independently of pressure in the ventilation conduit (70) and/or the pneumatic main conduit (60). |
