System for controlling a compressor of an air conditioner for motor vehicles

摘要

A vehicle speed detector is provided for producing a vehicle speed signal and a load detector detects load on an engine to produce a load signal. A map storing a plurality of reference load values dependent on vehicle speeds is provided, and a reference load value is derived from the map in accordance with the vehicle speed signal. The load signal is compared with a derived reference load value. When the load is larger than the derived reference load value, a clutch for a compressor is disengaged to stop operation of the compressor.