Vehicle Tire Change Detection for Accurate Range Estimation
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Solution Overview
Problem
Existing methods fail to accurately account for tire changes, such as switching between summer and winter tires, which significantly impact vehicle range estimation, leading to inaccurate driving range predictions.
Innovation Solution
A method and system that detect changes in tire friction by monitoring tire parameters, register the occurrence of these changes with a calendar query, and update tire friction values based on calendar events for summer/winter tire changes, thereby improving the accuracy of vehicle range estimation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If tire changes are not detected and accounted for, then the system structure remains simple, but vehicle range estimation accuracy deteriorates
Solution Approach 1:
The system continuously monitors tire parameters (pressure, temperature, rotation speed) and compares actual values against expected values to detect tire changes. This feedback mechanism triggers automatic updates to the vehicle range estimator when tire friction characteristics change, ensuring accurate range estimation without manual intervention or complex sensor systems.
Solution Approach 2:
The vehicle's existing sensor network (tire pressure monitoring, temperature sensors, wheel rotation sensors) is repurposed to automatically detect tire changes. The system uses already-available data from these sensors to infer tire friction characteristics and trigger range estimation updates, eliminating the need for additional dedicated sensors or complex detection hardware.
2Measurement precision
If tire friction changes are detected and accounted for, then vehicle range estimation accuracy improves, but computational complexity increases
Solution Approach 1:
The system detects tire changes by monitoring changes in existing tire parameters (pressure, temperature, rotation speed) rather than directly measuring friction. When these parameters indicate a tire change, the system updates the friction coefficient parameter in the range estimation model, achieving accurate range prediction through parameter adaptation rather than complex computational models.
Solution Approach 2:
Instead of continuously recalculating the entire vehicle range estimation model, the system performs partial updates by only adjusting the friction coefficient parameter when tire changes are detected. This selective updating approach reduces computational overhead while maintaining estimation accuracy, avoiding the need for full model recalculation at all times.
3Measurement precision
If continuous monitoring of tire parameters is performed, then tire change detection accuracy improves, but energy consumption increases
Solution Approach 1:
The system performs periodic sampling of tire parameters at predetermined intervals rather than continuous monitoring. This periodic measurement approach, combined with threshold-based change detection, maintains adequate tire change detection accuracy while significantly reducing the energy consumption associated with constant sensor activation and data processing.
Solution Approach 2:
The system uses intermediate inference by analyzing changes in easily measurable parameters (pressure, temperature, rotation speed) to detect tire friction changes indirectly. This intermediary approach allows accurate tire change detection without requiring direct friction measurement or continuous high-power sensor operation, reducing energy consumption while maintaining detection accuracy.
Data Source
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AI summary
A method for tire change adaption of a vehicle having tires is provided. The method comprising: detecting a change in tire friction for a plurality of the tires by monitoring one or more tire parameters; registering a point in time associated with the occurrence of the detected change in tire friction and performing a calendar query pertaining to the registered point in time; determining a tire friction difference value pertaining to the detected change of tire friction; and upon the tire friction difference value being above a threshold value and the registered point in time being associated with, as determined by the calendar query, a calendar event, wherein the calendar event pertains to a date or time period for summer or winter tire changeover; communicating with a vehicle range estimator comprising tire friction values and updating the tire friction values based on the detected change of tire friction.