Ambient air temperature sensor correction method
AssigneeFord Global Technologies, LLC
InventorAed M. Dudar
Life of this patent
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Abstract
Methods and systems are provided for conducting an ambient air temperature (AAT) sensor test. In one example, a method may include adjusting a vehicle actuator to reduce a deviation of the AAT measured by an AAT sensor on board a vehicle from an expected AAT and remeasuring the AAT with the AAT sensor in response to the AAT measured by the AAT sensor deviating from the expected AAT by more than a threshold temperature difference. In this way, excessively inflated or depressed AAT measurements at the AAT sensor can be reduced, the accuracy and the reliability of the AAT sensor measurements can be increased, vehicle fuel consumption and emissions can be reduced, and vehicle drivability can be increased.
Claims16
A method for a vehicle including an ambient air temperature (AAT) sensor, the method comprising:
- in response to an AAT measured by the AAT sensor deviating from an expected AAT by more than a threshold temperature difference;
- adjusting a vehicle actuator to reduce the deviation of the AAT measured by the AAT sensor from the expected AAT, wherein adjusting the vehicle actuator includes changing an active grille shutter (AGS) position by more than a threshold position change prior to elapsing of a threshold time;
- remeasuring the AAT with the AAT sensor after adjusting the vehicle actuator, wherein remeasuring the AAT with the AAT sensor comprises remeasuring the AAT after the threshold time has elapsed after adjusting the vehicle actuator;
- and
- indicating a corrected AAT sensor when the remeasured AAT deviates from the expected AAT by less than the threshold temperature difference.
A method, comprising:
- performing a temperature sensor test during a first condition when a temperature difference between an ambient air temperature (AAT) measured by a temperature sensor on board a vehicle and an expected AAT increases beyond a threshold temperature difference, wherein performing the temperature sensor test includes;
- increasing insulation of the temperature sensor from radiant heat transferred thereto by adjusting a vehicle actuator from a first state to a second state;
- and
- remeasuring the AAT with the temperature sensor after adjusting the vehicle actuator to the second state.
A vehicle system including an ambient air temperature (AAT) sensor, and a controller on board a vehicle with executable instructions stored in non-transitory memory thereon, wherein the vehicle system comprises an autonomous vehicle (AV), and wherein the executable instructions include:
- in response to an AAT measured by the AAT sensor deviating from an expected AAT by more than a threshold temperature difference;
- adjusting one or more vehicle actuators to reduce the deviation of the AAT measured by the AAT sensor from the expected AAT;
- and
- remeasuring the AAT with the AAT sensor after adjusting the vehicle actuator,
- wherein during a first condition including when the vehicle is OFF, adjusting the one or more vehicle actuators to reduce the deviation of the AAT measured by the AAT sensor from the expected AAT comprises repositioning the AV to orient the AAT sensor more away from solar radiation.
Dependencies are inferred from the claim text.