Patent ID: 6840054

Claim:
An air conditioning system for cooling a vehicle passenger compartment, the system comprising: an air duct for directing air conditioned air into the vehicle passenger compartment; refrigerant circuit for circulating a refrigerant, wherein a first portion of the circuit is exposed to the air duct end a second portion of the circuit is exposed to air external of the vehicle passenger compartment; a variable displacement compressor in fluid communication with the refrigerant circuit, wherein the compressor having: a first control valve for regulating refrigerant flow between a compressor crankcase and a compressor discharge chamber and a second control valve, separate from the first control valve, for regulating refrigerant flow between the compressor crankcase and a compressor suction chamber a controller in electrical communication with the variable displacement compressor for controlling refrigerant flow and a displacement of the compressor by actuating the control-valves.