Patent ID: 6691523
Filing Date: 2004-02-17
Classification: B60H

Abstract:
A method of operation for an air conditioning system of a motor vehicle, including an electrical load and a refrigerant compressor driven by a vehicle engine and having a pumping capacity that is controlled by an electrically activated capacity control valve, the method comprising the steps of:detecting a condition of high compressor pumping capacity; detecting a period of acceleration of the vehicle; overriding a normal activation level of said capacity control valve to reduce the compressor pumping capacity to a minimum value when the period of acceleration is initially detected, provided that said condition of high compressor pumping capacity is also detected; maintaining said override for at least a predefined minimum time; and overriding the electrical load while the normal activation level of said capacity control valve is being overridden so as to reduce a load imposed on the engine by such electrical load.