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AssigneeDelphi Technologies, Inc.
InventorsWayne Oliver Forrest, Elliott D. Keen, Mohinder Singh Bhatti
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An improved vehicle climate control system in which the passenger compartment temperature and humidity are controlled without requiring a humidity sensor. The control is based on the recognition that the air temperature at the evaporator outlet represents the dew point of the air supplied to the passenger compartment, and may be specified based on the desired passenger compartment air temperature to achieve a desired relative humidity in the vehicle once the desired passenger compartment temperature has been achieved. In a first mechanization, the desired relative humidity is predetermined, and the corresponding values of evaporator outlet air temperature are determined as a function of the desired passenger compartment temperature. In a second mechanization, the operator of the vehicle is permitted to select a desired relative humidity, and the corresponding values of evaporator outlet air temperature are determined as a function of the desired passenger compartment temperature and the selected humidity level.
A method of operation for a vehicle climate control system including a controlled capacity refrigerant compressor and an evaporator which receives chilled refrigerant for cooling and de-humidifying air passing through the evaporator prior to being discharged into a passenger compartment of the vehicle, comprising the steps of:
Dependencies are inferred from the claim text.