DEVICE, METHOD, AND SYSTEM FOR COMPRESSED AIR CONTROL AND COMPRESSED AIR SUPPLY

摘要

The invention relates to a compressed air control device (2) and to a compressed air control method for controlling respective operating states of a compressor (6) and of an air drying device (8) in a vehicle. The compressed air control device (2) has a compressor control outlet (36), by means of which the compressed air control device can be pneumatically connected to a control inlet of the compressor (6) in order to pneumatically switch the operating state of the compressor (6). The compressed air control device (2) further comprises a system pressure inlet (28), by means of which the compressed air control device can be pneumatically connected to a system pressure line (21), which conducts a system pressure produced by the compressor (6). The compressed air control device (2) further comprises a ventilation control outlet (36), by means of which the compressed air control device can be pneumatically connected to a control inlet of the air drying device (8) in order to pneumatically switch the operating state of the air drying device (8). Finally, the compressed air control device (2) also comprises a pneumatically operable ventilation control valve (14), by means of which the system pressure inlet (21) can be pneumatically connected to the ventilation control outlet (36) depending on the system pressure in order to switch the operating state of the air drying device (8). According to the invention, an electrically operable supply control valve (12) is provided in the compressed air control device (2). By means of the supply control valve, the system pressure inlet (28) can be pneumatically connected to the compressor control outlet (62) independently of the system pressure in order to switch the operating state of the compressor (6). Thus, energy-saving operation of a compressed air supply system (4) comprising the compressed air control device (2) and the air drying device (8) by means of a compressed air supply method containing the compressed air control method is possible.