Vehicle control using an estimated outside air temperature

The system addresses EV range inaccuracies by estimating outside air temperature using recorded profiles to adjust vehicle operations, ensuring accurate range and operational settings for BEVs and EREVs, particularly when parked in garages or shelters.

DE102013202303B4Active Publication Date: 2026-05-28GM GLOBAL TECHNOLOGY OPERATIONS LLC
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Patent Information

Application Number
DE102013202303
Authority / Receiving Office
DE · DE
Patent Type
Patents
Current Assignee / Owner
Priority Date
2012-02-20
Filing Date
2013-02-13
Publication Date
2026-05-28
Estimated Expiration
2033-02-13

AI Technical Summary

Technical Problem

Battery electric vehicles (BEVs) and extended-range electric vehicles (EREVs) face challenges in accurately estimating electric vehicle range due to uncertainties in outside air temperature, especially when parked in garages or shelters, leading to potential inefficiencies and inaccuracies in vehicle operation.

Method used

A system and method that uses a temperature sensor to determine if the vehicle is parked in a garage or shelter, estimating the outside air temperature based on recorded temperature profiles, and adjusting vehicle operations such as EV range, HVAC settings, or diagnostics using a controller and a clock to ensure accurate calculations before the vehicle leaves.

Benefits of technology

Enhances the accuracy of EV range estimation and vehicle operation by accounting for temperature discrepancies between garage and actual outside air, providing a more reliable driving range and operational settings, reducing uncertainties and improving user experience.

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Abstract

Vehicle (10), comprising: an electric drive motor (12) that generates a motor output torque to propel the vehicle (10) in an electric vehicle mode; a rechargeable energy storage system (14) that supplies electrical energy to the drive motor (12), wherein the rechargeable energy storage system (14) has a state of charge and a capacity; a navigation system designed to calculate the remaining electric vehicle range as a function of the state of charge and capacity of the rechargeable energy storage system (14); an outside air temperature sensor (30) which is mounted on the vehicle (10); a clock (32); and a controller (20) in conjunction with the rechargeable energy storage system (14), the outdoor air temperature sensor (30) and the clock (32), which has a specific non-temporary memory in which a profile of recorded temperatures is recorded, wherein the profile of recorded temperatures includes a garage temperature profile and an actual outdoor air temperature profile; wherein the controller (20) is designed to: to detect a key activation event of the vehicle (10); in response to the key-on event, to determine whether the vehicle (10) is in a garage by calculating a difference between the garage temperature profile and the actual outside air temperature profile and comparing the difference with a calibrated threshold; to estimate an outside air temperature when the vehicle (10) is in the garage; and when the vehicle (10) is in the garage, to modify the calculated electric vehicle range using the estimated outside air temperature before the vehicle (10) leaves the garage; and If the vehicle (10) is not in the garage, the calculated electric vehicle range is modified using the outside air temperature measured by the outside air temperature sensor (30).
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Citation Information

Patent Citations

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