AIR SUPPLY SYSTEM AND METHOD FOR CONTROLLING OPERATION THEREOF, PNEUMATIC SYSTEM, VEHICLE AND COMPUTER PROGRAM

The invention is directed to an air supply system (100) with integrated compressor monitoring capability, in particular in terms of oil-carry over. The air supply system comprises a compressor unit (102) for providing compressed air, an air-drying unit (118) for providing dried compressed air, an air-processing control unit (122) configured to ascertain air-processing data (124) indicative of an operation of the compressor unit (102), an oil-separator unit (106) configured to filter out oil (112) from the compressed air (104) provided by the compressor unit (102) and comprising an oil-level sensor unit (116) configured to provide an oil-level signal (OL) indicative of an amount of oil filtered (OV) at the oil-separator unit (106); and wherein the air-processing control unit (122) is further configured to determine an expected oil separator filling volume (EV) using the air-processing data (124), to receive the oil-level signal (OL) and to provide a service-required.