Circuit/System Description

This air conditioning system uses a conventional clutch to engage and mechanically turn the compressor and a variable displacement solenoid valve to alter the amount of displacement created by the turning of the compressor. The BCM provides both switched battery voltage and a pulse width modulated ground to the variable displacement solenoid valve. The BCM grounds the variable displacement solenoid using a (PWM) signal in order to control the amount of compressor displacement. The performance of the air conditioning compressor is based on adjusted interior temperature and engine load.