Abstract: A vehicle air suspension system includes one or more bellows assigned to an air spring of one or more vehicle axles. The bellows can be connected to a main pressure line and can be blocked off therefrom via a connecting line having a level control valve. The main line can be supplied with air via a supply line having a compressor and an air dryer, and can be vented via a vent line, which branches off between the compressor and the air dryer and has a discharge valve. A pressure reservoir can be connected to the main line and can be blocked off therefrom via a connecting line having a storage valve. To set different flow velocities when supplying and venting the bellows, the bellows of the air spring arranged on a vehicle axle or on a vehicle side is/are connected to the main line and blocked off therefrom via at least two parallel connecting lines, each having a level control valve.

Abstract: A door control system for a vehicle includes a compressor, an air dryer, a door control valve and at least one cylinder that can be actuated by compressed air. A piston of the cylinder can occupy a first functional position and a second functional position. The air dryer, in drying mode, is exposed to throughflow of the air flowing into the cylinder, and in regeneration mode is exposed to throughflow by the air discharging from the cylinder. The cylinder is pressurized only with compressed air from a compressed air accumulator.

Abstract: A method is disclosed for producing a piston (8) having a circumferential seal in the form of a circular cup seal (16). In a functional, installed state, the cup seal (16) has a profile consisting of a leg held in the piston (8) and aligned radially with respect to the piston longitudinal axis (19) in a radial region (17) and of a leg which is bent by approximately 90° into an axial region (18) and is aligned approximately parallel to the piston longitudinal axis (19). The cup seal (16) is mounted in a mold as a flat or arched preform (21, 21a) with a radial region (17a, 17b) which forms the approximately radial leg, aligned with the piston longitudinal axis (19). A circumferential region (18a, 18b) projecting radially beyond the mold cavity is shaped into the axial region (18) after removing the piston from the mold to obtain the functional contour of the installed state of the cup seal (16).

Abstract: A compressed air supply unit for operating a pneumatic unit by means of a compressed air flow, in particular of an air suspension unit of a vehicle, comprises an air dryer arrangement in a main pneumatic line that pneumatically links a compressed air feed line from an air compressor and a compressed air connection to the pneumatic unit. A valve arrangement is pneumatically connected to the main pneumatic line for controlling the compressed air flow. The air dryer arrangement has a drying container having a container outer wall. A partition along a length of the drying container divides an internal space delimited by the container outer wall into first and second chambers delimited by the partition and the container outer wall. The partition adjoins the container outer wall along the length of the drying container, and the first and second chambers are adjacent to one another along that length.

Abstract: A vehicle air suspension system of includes at least one or more bellows assigned to an air spring of one or more vehicle axles. The bellows can be connected to a main pressure line and can be blocked off therefrom the latter via a connecting line having a level control valve. The main line can be supplied with air via a supply line having a compressor and an air dryer, and can be vented via a vent line, which branches off between the compressor and the air dryer and has a discharge valve. A pressure reservoir can be connected to the main line and can be blocked off therefrom via a connecting line having a storage valve. To set different flow velocities when supplying and venting the bellows the bellows of the air spring arranged on a vehicle axle or on a vehicle side is/are connected to the main line and blocked off therefrom via at least two parallel connecting lines, each having a level control valve.

Abstract: A compressed air supply assembly for operating a pneumatic assembly includes a compressed air supply; a compressed air connection to the pneumatic assembly; a purge connection to the environment; a pneumatic main line between the compressed air supply and the compressed air connection comprising an air dryer; a purge line between the compressed air connection and the purge connection; and a solenoid valve arrangement with a control valve to control a purge valve. The control valve is connected to a control valve connection in a pneumatic control line connected to a pressure control connection of the purge valve, and the purge valve is connected to a purge valve connection in the purge line. A pressure-maintaining device is connected to the pneumatic control line and maintains control pressure at the pressure control connection when the purge valve connection is open, independently of pressure in the purge line and/or the main line.

Abstract: The invention relates to a compressed air supply installation (10, 11, 12, 20, 30) for operating a pneumatic installation (90), especially an air suspension installation of a vehicle, comprising a compressed air supply unit (1), a compressed air port (2) towards the pneumatic installation (90), a venting port (3) towards the surroundings, a first pneumatic connection between the compressed air supply (1) and the compressed air port (2), said pneumatic connection having an air drier (61) and a shut-off valve, and a second pneumatic connection between the compressed air port (2) and the venting port (3). According to the invention, the shut-off valve is designed as a pneumatically pilot-controlled check valve (63, 64).

Abstract: The invention relates to a pneumatic installation (901, 902, 903, 904, 905), especially in the form of an air suspension installation for a vehicle, which is adapted for operation in conjunction with a compressed air supply installation (11, 21, 31, 41) and comprises the following: a collecting line in the form of a gallery line (95), at least one air spring having a pressure chamber which can be pneumatically connected to the gallery line (95), an accumulator (92) for compressed air, which is pneumatically connectable to the gallery line (95), and a compressed air port (2) for a pneumatic connection of the pneumatic installation (901, 902, 903, 904, 905) and the compressed air supply installation (11, 21, 31, 41).

Abstract: The invention relates to a compressed air supply installation (10, 10A, 10B, 10C) for operating a pneumatic installation (90), especially an air suspension installation of a vehicle, comprising the following: an air supply unit (0) and an air compression unit (21) for supplying a compressed as supply unit (1) with compressed air, a pneumatic connection, especially a bleeding line (30), comprising a bleeding valve system in the form of a controllable solenoid valve system (40, 40A, 40B, 40C) having a magnetic part (43, 43A, 43B, 43C) and a pneumatic part (44, 44A, 44B, 44C), and further comprising a bleeding port (3) for bleeding air, and the compressed air supply installation further comprising a pneumatic connection, especially a compressed air supply line (20) having an air drier (22) and a compressed air port (2) for supplying the pneumatic installation (90) with compressed air.

Abstract: The invention relates to a door control system for vehicles, with a compressor (1), an air dryer (3), a door control valve (4) and at least one cylinder (2) which can be actuated by compressed air, and also relates to a method for actuating a cylinder (2) of a vehicle door, in which a piston (13) of the cylinder (2) can occupy a first functional position (O) and a second functional position (X). The air dryer (3), in drying mode, is exposed to throughflow of the air flowing into the cylinder (2) and in regeneration mode is exposed to throughflow by the air discharging from the cylinder (2). The cylinder (2) is pressurised only with compressed air from a compressed air accumulator (7).

Abstract: The invention relates to an air supply device (1) for a pneumatic spring system (9) of a vehicle, comprising an air filter as a processor (2) for incoming air, an inlet air line (3), an outlet air line (4), a compressor (5), and optionally an air drier (6), wherein the inlet air line (3) and the outlet air line (4) are decoupled by a first and a second check valve (7, 8) and the processor (2) is arranged between the compressor (5) and the first or second check valve (7, 8).