Air conditioning systems for vehicle with hybrid compressor

A method for driving a hybrid compressor (4) of an air conditioning system (100) of a vehicle is provided. The vehicle includes a first drive source (2), and the air conditioning system (100) includes an evaporator (9). Moreover, the hybrid compressor (4) includes a second drive source (5), and the hybrid compressor (4) is driven by the first drive source (2) via an electromagnetic clutch (3) or the second drive source (5), or a combination thereof. The method includes the steps of engaging the electromagnetic clutch (3), detecting a temperature of air dispensed from the evaporator (9), and disengaging the electromagnetic clutch (3) when the temperature of the air is equal to a predetermined temperature. The method also includes the step of activating the second drive source (5). Specifically, the step of disengaging the electromagnetic clutch (3) when the temperature of the air is equal to the predetermined temperature and the step of activating the second drive source (5) is performed simultaneously or substantially simultaneously.