Efficient AC operation using dew-point temperature
AssigneesChrysler Group LLC, Daimler AG
InventorsMark A. Hill, Alfred Jeckel, Curt O'Donnell, Mark Bigler, Lance Tagliapietra
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Abstract
A system for controlling air-conditioning of a vehicle includes an input, an offset generator module, and an evaporator temperature control module. The input receives an input temperature. The offset generator module receives a psychrometric parameter of air inside the vehicle and generates offsets based on the input temperature and the psychrometric parameter. The evaporator temperature control module generates a target evaporator temperature based on the offsets.
Claims20
A system for controlling air-conditioning of a vehicle, comprising:
- an input that receives an input temperature;
- an offset generator module that receives a psychrometric parameter of air inside said vehicle and that generates offsets based on said input temperature and said psychrometric parameter;
- an evaporator temperature control module that generates a target evaporator temperature based on said offsets;
- and
- an air-conditioning (AC) module operative to control a compressor by turning off said compressor when a difference between said psychrometric parameter and a vehicle windshield glass temperature is greater than or equal to a first threshold temperature and by turning on said compressor when a difference between said psychrometric parameter and said glass temperature is less than or equal to a second threshold temperature.
A method for controlling air-conditioning of a vehicle, comprising:
- receiving an input temperature;
- receiving a psychrometric parameter of air inside said vehicle;
- generating offsets based on said input temperature and said psychrometric parameter;
- generating a target evaporator temperature based on said offsets;
- and
- controlling a compressor by turning off said compressor when a difference between said psychrometric parameter and a vehicle windshield glass temperature is greater than or equal to a first threshold temperature and by turning on said compressor when a difference between said psychrometric parameter and said windshield glass temperature is less than or equal to a second threshold temperature.
Dependencies are inferred from the claim text.