A method for controlling cycling of an air conditioning compressor (220) coupled to an internal combustion engine (10) interrupts normal cycling based on operation conditions. In addition, normal engaged and disengaged cycling durations are adaptively esti...

The present invention balances power consumption reduction and a cooling in a vehicle air-conditioning system having a compressor (1) selectively driven by a vehicle engine (20) or a motor (21) while the compressor (1) is driven by the motor (21). At least...

An engine control apparatus of a vehicle comprises an air conditioner with a variable displacement compressor (104). The pressure difference measured between two monitoring points in a refrigeration circuit represents the compressor displacement. The compr...

A vehicle air conditioner includes a variable displacement compressor (10) forming a part of a coolant circuit, detectors (80-83) for detecting external information necessary for air conditioning, and a controller (79). The compressor (10) has pistons (35)...