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An air conditioning system for a vehicle includes a compressor. The vehicle includes a first drive source and the compressor includes a second drive source. The compressor is driven by the first drive source or the second drive source, or a combination thereof, and the second drive source includes a

An air conditioning system for a vehicle includes a compressor. The vehicle includes a first drive source and the compressor includes a second drive source. The compressor is driven by the first drive source or the second drive source, or a combination thereof, and the second drive source includes an electrical power supply. The air conditioning system also includes a controller for selecting between the first drive source and the second drive source, such that when the compressor is active, the first drive source drives the compressor except when the vehicle is operating in a predetermined mode, a voltage of the electrical power supply is greater than or equal to a minimum electrical power supply voltage, and an amount of electric power consumed by the second drive source is less than a maximum electric power. For example, the predetermined mode may be an idle-stop mode.

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1. An air conditioning system for a vehicle comprising a first drive source, wherein the air conditioning system comprises:at least one compressor comprising a second drive source, wherein the at least one compressor is driven by the first drive source or the second drive source, or a combination th

1. An air conditioning system for a vehicle comprising a first drive source, wherein the air conditioning system comprises:at least one compressor comprising a second drive source, wherein the at least one compressor is driven by the first drive source or the second drive source, or a combination thereof, and the second drive source comprises an electrical power supply; and means for selecting between the first drive source and the second drive source, such that when the at least one compressor is active, at least the first drive source drives the at least one compressor except when: the vehicle is operating in at least one predetermined mode; and a voltage of the electrical power supply is greater than or equal to a minimum electrical power supply voltage. 2. The air conditioning system of claim 1, wherein the at least one predetermined mode comprise an idle-stop mode.3. The air conditioning system of claim 1, wherein the at least one compressor further comprises:a first compression mechanism driven by the first drive source; and a second compression mechanism driven by the second drive source. 4. The air conditioning system of claim 1, wherein the first drive source comprises an engine, the second drive source comprises an electric motor, and the electric power supply comprises a battery.5. The air conditioning system of claim 1, further comprising:means for determining whether the vehicle is operating in an idle-stop mode; and means for determining whether the voltage of the electrical power supply is greater than or equal to the minimum electrical power supply voltage. 6. The air conditioning system of claim 1, further comprising:an evaporator; and means for determining whether a temperature of air dispensed from the evaporator is greater than a predetermined temperature, wherein the at least one compressor is inactive when the temperature of air dispensed from the evaporator is less than the predetermined temperature, and the at least one compressor is active when the temperature of air dispensed from the evaporator is greater than or equal to the predetermined temperature. 7. An air conditioning system for a vehicle comprising a first drive source, wherein the air conditioning system comprises:at least one compressor comprising a second drive source, wherein the at least one compressor is driven by the first drive source or the second drive source, or a combination thereof, and the second drive source comprises an electrical power supply; and means for selecting between the first drive source and the second drive source, such that when the at least one compressor is active, at least the first drive source drives the at least one compressor except when: the vehicle is operating in at least one predetermined mode; and an amount of electrical power delivered by the electrical power supply to the second drive source is greater than or equal to a minimum electrical power. 8. The air conditioning system of claim 7, wherein the at least one predetermined mode comprises an idle-stop mode.9. The air conditioning system of claim 7, wherein the at least one compressor further comprises:a first compression mechanism driven by the first drive source; and a second compression mechanism driven by the second drive source. 10. The air conditioning system of claim 7, wherein the first drive source comprises an engine, the second drive source comprises an electric motor, and the electric power supply comprises a battery.11. The air conditioning system of claim 7, further comprising:means for determining whether the vehicle is operating in an idle-stop mode; and means for determining whether the amount of electrical power delivered by the electrical power supply to the second drive source is greater than or equal to the minimum electrical power. 12. The air conditioning system of claim 7, further comprising:an evaporator; and means for determining whether a temperature of air dispensed from the evaporator is greater than a predetermined temperature, wherein the at least one compressor is inactive when the temperature of air dispensed from the evaporator is less than the predetermined temperature, and the at least one compressor is active when the temperature of air dispensed from the evaporator is greater than or equal to the predetermined temperature. 13. A vehicle comprising:a first drive source; and an air conditioning system comprising: at least one compressor comprising a second drive source, wherein the at least one compressor is driven by the first drive source or the second drive source, or a combination thereof, and the second drive source comprises an electrical power supply; and means for selecting between the first drive source and the second drive source, such that when the at least one compressor is active, at least the first drive source drives the at least one compressor except when: the vehicle is operating in an idle-stop mode; and a voltage of the electrical power supply is greater than or equal to a minimum electrical power supply voltage. 14. The vehicle of claim 13, wherein the at least one compressor further comprises:a first compression mechanism driven by the first drive source; and a second compression mechanism driven by the second drive source. 15. The vehicle of claim 13, wherein the first drive source comprises an engine, the second drive source comprises an electric motor, and the electric power supply comprises a battery.16. The vehicle of claim 13, further comprising:means for determining whether the vehicle is operating in an idle-stop mode; and means for determining whether the voltage of the electrical power supply is greater than or equal to the minimum electrical power supply voltage. 17. The air conditioning system of claim 13, further comprising:an evaporator; and means for determining whether a temperature of air dispensed from the evaporator is greater than a predetermined temperature, wherein the at least one compressor is inactive when the temperature of air dispensed from the evaporator is less than the predetermined temperature, and the at least one compressor is active when the temperature of air dispensed from the evaporator is greater than or equal to the predetermined temperature. 18. A vehicle comprising:a first drive source; and an air conditioning system comprising: at least one compressor comprising a second drive source, wherein the at least one compressor is driven by the first drive source or the second drive source, or a combination thereof, and the second drive source comprises an electrical power supply; and means for selecting between the first drive source and the second drive source, such that when the at least one compressor is active, at least the first drive source drives the at least one compressor except when: the vehicle is operating in at least one predetermined mode; and an amount of electrical power delivered by the electrical power supply to the second drive source is greater than or equal to a minimum electrical power. 19. The vehicle of claim 18, wherein the at least one predetermined mode comprises an idle-stop mode.20. The vehicle of claim 18, wherein the at least one compressor further comprises:a first compression mechanism driven by the first drive source; and a second compression mechanism driven by the second drive source. 21. The vehicle of claim 18, wherein the first drive source comprises an engine, the second drive source comprises an electric motor, and the electric power supply comprises a battery.22. The vehicle of claim 18, further comprising:means for determining whether the vehicle is operating in an idle-stop mode; and means for determining whether the amount of electrical power delivered by the electrical power supply to the second drive source is greater than or equal to the minimum electrical power. 23. The vehicle of claim 18, further comprising:an evaporator; and means for determining whether a temperature of air dispensed from the evaporator is greater than a predetermined temperature, wherein the at least one compressor is inactive when the temperature of air dispensed from the evaporator is less than the predetermined temperature, and the at least one compressor is active when the temperature of air dispensed from the evaporator is greater than or equal to the predetermined temperature. 24. A method for driving at least one compressor of an air conditioning system of a vehicle, wherein the vehicle comprises a first drive source, and the air conditioning system comprises the at least one compressor, wherein the at least one compressor comprises a second drive source, and the second drive source comprises an electrical power supply, wherein the at least one compressor is driven by the first drive source or the second drive source, or a combination thereof, and the method comprises the steps of:determining whether the vehicle is operating in at least one predetermined mode; activating the second drive source when the vehicle is operating in the at least one predetermined mode; and determining whether an amount of electric power consumed by the second drive source is greater than or equal to a maximum electric power switching the drive of the at least one compressor from the second drive source to the first drive source. 25. The method of claim 24, wherein the at least one predetermined mode comprises an idle-stop mode.26. The method of claim 24, further comprising the steps of:deactivating the second drive source when a voltage of the electrical power supply is less than a minimum electrical power supply voltage; and activating the first drive source when the voltage of the electrical power supply is less than the minimum electrical power supply voltage. 27. The method of claim 24, further comprising the steps of:deactivating the second drive source when an amount of electrical power delivered by the electrical power supply to the second drive source is less than a minimum electrical power; and activating the first drive source when the amount of electrical power delivered by the electrical power supply to the second drive source is less than the minimum electrical power. 28. The method of claim 24, wherein the at least one compressor further comprises:a first compression mechanism driven by the first drive source; and a second compression mechanism driven by the second drive source. 29. The method of claim 24, wherein the first drive source comprises an engine, the second drive source comprises an electric motor, and the electric power supply comprises a battery.