Driving Evaluation Using Tire Force Threshold Integration
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Solution Overview
Problem
Existing driving evaluation methods fail to adequately assess tire forces during braking and driving, particularly in curves, limiting the ability to provide effective advice for improving lap times.
Innovation Solution
A method and apparatus that acquire tire forces, calculate proportion values based on load, and integrate tire forces within defined threshold ranges to evaluate driving skill, providing detailed feedback for skill improvement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If statistical dispersion of tire forces is evaluated, then general driving characteristics can be assessed, but tire force production in curves and during braking/driving cannot be sufficiently evaluated
Solution Approach 1:
The evaluation is divided into multiple components: curve section evaluation (lateral force focus), braking section evaluation (longitudinal force focus), and driving section evaluation (longitudinal force focus). Each section uses appropriate tire force components and evaluation metrics specific to that driving condition, enabling precise assessment of tire force production in each scenario.
Solution Approach 2:
Different evaluation methods are applied to different sections of the course based on local driving characteristics. Curve sections use lateral force and slip angle evaluations, while braking and driving sections use longitudinal force and acceleration evaluations. This localized approach ensures each section is evaluated with the most appropriate metrics.
2Measurement precision
If general driving characteristics are evaluated using statistical dispersion, then overall performance can be measured, but specific advice for improving lap time cannot be provided
Solution Approach 1:
The system provides feedback by comparing evaluated tire force production against ideal or reference values, then generates specific improvement advice tailored to the driver's performance in each section. This feedback loop converts raw evaluation data into actionable recommendations for reducing lap time.
Solution Approach 2:
The evaluation uses multiple parameters (lateral force, longitudinal force, slip angle, acceleration) changed according to driving section. By monitoring changes in these parameters across different driving conditions, the system identifies specific areas for improvement and provides targeted advice.
Data Source
AI summary
A driving evaluation method includes acquiring a tire force, calculating a proportion, and calculating an evaluation value. The acquiring of the tire force acquires a tire force generating while a vehicle is running. The calculating of the proportion calculates the proportion value by dividing the tire force acquired by the acquiring of the tire force by a load value. The calculating of the evaluation calculates the evaluation value by integrating the tire force for which the proportion value acquired by the calculating of the proportion value belongs to a range defined by a threshold value.