Auto A/C solar compensation control
AssigneeHonda Motor Co., Ltd.
InventorJohn Phillippo
Life of this patent
Estimating the term…
Abstract
A method of controlling an HVAC system to more effectively cool a vehicle cabin when the solar azimuth is large. A solar azimuth, an outside air temperature, a set temperature, a cabin temperature, and an ignition time are communicated to a controller that determines how to best operate the HVAC system. When the vehicle has only been running for a short period of time, the cabin temperature is elevated, and the solar azimuth is large, the measured solar azimuth is corrected to a corrected solar azimuth. The corrected solar azimuth is smaller than the measured solar azimuth and yields a large sun temperature. The controller then calculates a TAO based upon the large sun temperature and the TAO is used to control the HVAC system.
Claims18
A method for controlling a vehicle HVAC system to cool a vehicle cabin comprising:
- measuring a time of operation of the vehicle;
- determining an angle at which sunlight is entering the cabin;
- determining a measured solar azimuth—value—based on the angle at which sunlight is entering the cabin;
- determining whether to correct the measured solar azimuth—value—to a corrected solar azimuth—value, wherein the determination of whether to correct the measured solar azimuth value is—based—on—the measured time of operation;
- upon determining that the measured solar azimuth—value—is to be corrected, correcting the measured solar azimuth—value—to the corrected solar azimuth—value—based on the measured time of operation;
- determining a sun temperature based on at least one of the measured solar azimuth—value—and the corrected solar azimuth—value—;
- and
- operating the HVAC system in accordance with a predetermined algorithm based upon the determined sun temperature.
A method for controlling a vehicle HVAC system to cool a vehicle cabin comprising:
- measuring an interior air temperature of the vehicle;
- determining an angle at which sunlight is entering the cabin;
- determining a measured solar azimuth—value—based on the angle at which sunlight is entering the cabin;
- determining whether to correct the measured solar azimuth—value—to a corrected solar azimuth—value, wherein the determination of whether to correct the measured solar azimuth value is—based—on—the measured interior air temperature;
- upon determining that the measured solar azimuth—value—is to be corrected, correcting the measured solar azimuth—value—to the corrected solar azimuth—value—based on the measured interior air temperature;
- determining a sun temperature based on at least one of the measured solar azimuth—value—and the corrected solar azimuth—value—;
- and
- operating the HVAC system in accordance with a predetermined algorithm based upon the determined sun temperature.
Dependencies are inferred from the claim text.