Vehicle Tire Grip Risk Estimation Using Multi-Parameter Analysis
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Solution Overview
Problem
Existing methods for estimating the risk of a lack of connection with the ground for motor vehicles are not accurate and reliable, often resulting in false warnings or missed warnings due to reliance on single parameters like temperature, and fail to account for various road conditions and tire states.
Innovation Solution
A method that estimates the risk of a lack of connection with the ground by using three parameters: maximum grip potential, utilization percentage of the grip potential, and the magnitude of tire hydroplaning risk, which are measured and compared against reference values and thresholds adjusted for vehicle conditions to provide a comprehensive and reliable assessment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If temperature sensor is used to estimate risk of lack of connection with ground, then the estimation is simple, but the accuracy and reliability are insufficient
Solution Approach 1:
The patent combines multiple independent parameters (maximum grip potential μmax, utilization percentage Pu, and hydroplaning risk magnitude Ps) into a comprehensive risk estimation model. This merging of parameters allows the system to maintain simplicity in implementation while significantly improving the accuracy and reliability of grip risk assessment by considering multiple aspects of tire-road interaction simultaneously.
Solution Approach 2:
The risk estimation uses a composite approach by integrating three distinct parameter types that represent different physical phenomena: friction-based grip potential, force utilization ratios, and hydroplaning risk. This composite parameter model functions similarly to composite materials, where each parameter contributes its unique strength to the overall assessment, creating a more robust and reliable estimation system than any single parameter could provide.
2Device complexity
If single parameter (temperature) is used for risk estimation, then the method is simple, but false warnings are triggered
Solution Approach 1:
By merging three independent parameters that measure different aspects of tire grip, the system creates a more informative assessment model. The combination of maximum grip potential, utilization percentage, and hydroplaning risk allows the system to distinguish between actual grip deficiencies and conditions that do not pose real risks, thereby reducing false alarms while maintaining reasonable system complexity.
3Ease of manufacture
If temperature-based estimation is used, then the implementation is simple, but risks under certain conditions (oil on road, worn tires) are not detected
Solution Approach 1:
The three-parameter model serves multiple functions across diverse road and tire conditions. The maximum grip potential parameter adapts to different surface conditions (ice, oil, wet roads), the utilization percentage accounts for tire wear and driving demands, and the hydroplaning risk parameter addresses water-related conditions. This multi-functional approach enables the system to reliably estimate grip risk across a wide range of conditions that temperature alone cannot detect.
Data Source
AI summary
According to the method, the risk is estimated as a function of a maximum grip potential μmax of the tire, a utilization percentage Pu representative of the fraction of the maximum grip potential of the tire that is being used, and a magnitude Ps associated with a risk of the tire hydroplaning, in particular a loss of tire area.