Automotive virtual humidity sensor
First Claim
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1. A method, comprising:
- adjusting an engine powertrain component of a vehicle responsive to barometric pressure and an estimated ambient humidity, the estimated ambient humidity based on each of vehicle position in a region, a current time of day and/or year, ambient temperature, and data for the region for the current time of day and/or year stored in a memory of a controller;
determining a difference between a measured humidity and the estimated humidity, where the measured humidity is received at the controller when the controller is connected to a data source external to the vehicle;
updating estimation parameters used to estimate the estimated humidity based on the determined difference; and
uploading the updated estimation parameters and acquired humidity data to a cloud server external to the vehicle, the uploading occurring during vehicle operation, and wherein the updated estimation parameters and acquired humidity data are generated during vehicle operation from estimation of the estimated humidity.
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Abstract
Systems and methods are provided for adjusting an engine powertrain component responsive to ambient humidity, the ambient humidity based on vehicle position in a region, clock time ambient temperature, and historical humidity data for that region for a current time of year. This may be accomplished without relying on a costly, and often, temperamental physical humidity sensor. Training modules and cloud updates may further increase the accuracy of the virtual humidity sensor of the present disclosure.
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Citations
19 Claims
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1. A method, comprising:
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adjusting an engine powertrain component of a vehicle responsive to barometric pressure and an estimated ambient humidity, the estimated ambient humidity based on each of vehicle position in a region, a current time of day and/or year, ambient temperature, and data for the region for the current time of day and/or year stored in a memory of a controller; determining a difference between a measured humidity and the estimated humidity, where the measured humidity is received at the controller when the controller is connected to a data source external to the vehicle; updating estimation parameters used to estimate the estimated humidity based on the determined difference; and uploading the updated estimation parameters and acquired humidity data to a cloud server external to the vehicle, the uploading occurring during vehicle operation, and wherein the updated estimation parameters and acquired humidity data are generated during vehicle operation from estimation of the estimated humidity. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A virtual humidity sensor in a vehicle, comprising:
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a vehicle bus adapted to connect to a measured humidity source; vehicle operating and vehicle condition sensors coupled to the vehicle bus; a training module coupled to the vehicle bus for comparison of a measured humidity received from the measured humidity source with an estimated humidity; and a computer readable storage medium with a logic unit coupled to the vehicle bus and including instructions stored therein to; determine the estimated humidity based on input values from one or more of the vehicle operating and vehicle condition sensors and stored historical humidity data; update estimation parameters used for determining the estimated humidity based on a comparison of the measured humidity and the estimated humidity at the training module; and upload the updated estimation parameters from the training module and acquired humidity data from operation of the virtual humidity sensor to a cloud server external to the vehicle. - View Dependent Claims (8, 9, 10, 11, 12, 13)
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14. A method, comprising:
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estimating a humidity based on vehicle data onboard a vehicle, the vehicle data comprising a global positioning system location, an ambient temperature, a barometric pressure, and stored humidity data, look-up tables and formulas; and uploading acquired humidity estimates and training module parameter updates to a cloud server external to the vehicle. - View Dependent Claims (15, 16, 17, 18, 19)
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Specification