Method for controlling a motor vehicle air conditioning system

A method for controlling a motor vehicle air conditioning system containing a refrigeration circuit that includes at least one capacity-controlled refrigerant compressor, a refrigerant condenser, an evaporator, a throttle device for the refrigerant arranged upstream of the evaporator, a ventilating fan for cooling air charging being associated with the condenser, and a blower provided for generating an airstream through the evaporator, said method comprising the steps of:

• sensing the compressor capacity, the condenser capacity and the evaporator capacity;
• supplying the sensed compressor capacity, condenser capacity and evaporator capacity in the form of electrical variables to input terminals of a common electronic control circuit;
• performing logical operations within the common electronic control circuit on at least two of the electrical variables supplied to the common electronic control circuit and on parameters indicative of a refrigerant capacity requirement;
• and
• generating control output signals within the common electronic control circuit based upon the logical operations performed therein and supplying the control output signals to compressor, condenser, and evaporator device devices that control the compressor capacity, the condenser capacity and the evaporator capacity, respectively.