Abstract: An auxiliary engine generates electricity through an alternator, to charge the vehicle battery and selectively run an electric motor for air conditioning when the vehicle's primary engine is not operating. Operation of the electric motor produces rotation of the drive shaft of the vehicle's air conditioning compressor, the output shaft of the electric motor being connected via a centrifugal clutch, and a drive belt on a pulley integral to the clutch, to a pulley bolted directly to the drive shaft of the compressor. There is no use made of the vehicle's existing electromagnetic clutch at the compressor location, i.e. it remains disengaged when the auxiliary system is operating, and is engaged only when air conditioning is called for in normal vehicle operation, i.e. when the primary engine is running. The electricity generated by the auxiliary engine can also be used to operate other accessories, if desired, such as lighting, televisions, VCRs, refrigerators and other like accessories.

Abstract: An auxiliary engine generates electricity through an alternator, to charge the vehicle battery and selectively run an electric motor for air conditioning when the vehicle's primary engine is not operating. Operation of the electric motor produces rotation of the drive shaft of the vehicle's air conditioning compressor, the output shaft of the electric motor being connected via a centrifugal clutch, and a drive belt on a pulley integral to the clutch, to a pulley bolted directly to the drive shaft of the compressor. There is no use made of the vehicle's existing electromagnetic clutch at the compressor location, i.e. it remains disengaged when the auxiliary system is operating, and is engaged only when air conditioning is called for in normal vehicle operation, i.e. when the primary engine is running. The electricity generated by the auxiliary engine can also be used to operate other accessories, if desired, such as lighting, televisions, VCRs, refrigerators and other like accessories.