Abstract: A twin chamber air dryer for a pneumatic system of a commercial vehicle comprises: a supply inlet port, a supply outlet, a compressor control outlet, and an exhaust outlet; a first desiccant cartridge and a second desiccant cartridge, to be operated alternately; a toggling valve assembly for switching between the first and second desiccant cartridges; a pneumatically controlled purge valve switchable between a blocking basic position and an activated position; and a solenoid valve assembly. The solenoid valve assembly comprises a directional control solenoid valve for receiving an electrical direction control signal and controlling the toggling valve assembly, a regeneration solenoid valve for receiving an electrical regeneration control signal and providing pressurized air in regeneration phases of the desiccant cartridge, and a governor solenoid valve for receiving an electrical governor control signal and controlling the purge valve and a compressor mode.

Abstract: A compressed air supply system for supplying compressed air to a pneumatic system is disclosed. The compressed air supply system comprises a compressed air input port, a compressed air output port and a vent port, a pneumatic main pipe arranged between the compressed air input port and the compressed air output port, a pneumatic vent pipe arranged between the compressed air output port and the vent port and connected to the pneumatic main pipe, a purge valve arranged in the pneumatic vent pipe for venting the compressed air supply system, a regeneration valve for controlling a regeneration flow of compressed air through an air dryer arranged in the main pipe, a governor valve for generating a pressure signal, and a first and a second pneumatic control pipe.

Abstract: A compressed air supply system for supplying compressed air to a pneumatic system is disclosed. The compressed air supply system comprises a compressed air input port, a compressed air output port and a vent port, a pneumatic main pipe arranged between the compressed air input port and the compressed air output port, a pneumatic vent pipe arranged between the compressed air output port and the vent port and connected to the pneumatic main pipe, a purge valve arranged in the pneumatic vent pipe for venting the compressed air supply system, a regeneration valve for controlling a regeneration flow of compressed air through an air dryer arranged in the main pipe, a governor valve for generating a pressure signal, and a first and a second pneumatic control pipe.