Cornering Driving Evaluation Using Tire Friction Circle Analysis
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Solution Overview
Problem
Ordinary vehicle users find it difficult to analyze and understand the data logged by conventional data logger systems, which hinders their ability to evaluate and improve their driving skills for shortening lap times on circuit racecourses.
Innovation Solution
A driving evaluation device that includes a section detector to identify deceleration and acceleration sections during cornering, a tire friction circle-tire load factor calculator to calculate tire friction circles and load factors based on front-rear and lateral accelerations, and an evaluator to assess driving skills by analyzing these parameters, enabling detailed evaluation of turning, acceleration, and deceleration operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional data logger systems are used to log driving data, then detailed driving data can be recorded, but ordinary vehicle users find it difficult to analyze and understand the logged data
Solution Approach 1:
The patent introduces an evaluation device that acts as an intermediary between the data logger system and ordinary vehicle users. This device automatically analyzes logged driving data (front-rear acceleration, lateral acceleration, speed) and generates easy-to-understand evaluation results comparing actual driving with ideal driving patterns, thereby resolving the contradiction between detailed data recording and ease of data analysis
Solution Approach 2:
The patent replaces the manual data analysis process (which requires user expertise) with an automated computational system. The evaluation device uses algorithms to process acceleration and speed data, calculate evaluation values, and generate results without requiring user intervention in the analysis process, thus making precise measurement accessible to ordinary users
2Loss of information
If detailed driving analysis is performed using logged data, then driving skill evaluation is possible, but ordinary vehicle users cannot understand what information can be acquired
Solution Approach 1:
The patent uses visual indicators (such as bar graphs and color-coded representations) to display evaluation results. The evaluation value is represented in a visually intuitive format that allows ordinary users to immediately grasp their driving performance level and the information acquired, without needing to interpret complex numerical data
Solution Approach 2:
The evaluation device serves as a mediator that translates complex driving data into comprehensible evaluation information. It processes raw acceleration and speed data through analytical algorithms and presents the results in a user-friendly format that ordinary vehicle users can easily understand and act upon
3Productivity
If data logger systems are used for driving evaluation, then lap time improvement potential exists, but the systems have not been fully put to practical use by ordinary vehicle users
Solution Approach 1:
The patent implements a feedback mechanism where the evaluation device provides drivers with immediate evaluation results comparing their actual driving with ideal driving patterns. This feedback loop enables ordinary vehicle users to understand how to improve their driving technique to reduce lap times, thereby increasing the practical applicability and productivity of the data logging system
Solution Approach 2:
The evaluation device enables ordinary vehicle users to independently evaluate and improve their own driving performance without requiring external expert analysis. Users can process their own logged data, receive evaluation results, and make self-directed improvements, making the system highly adaptable and practical for widespread use
Data Source
AI summary
Provided is a driving evaluation device that enables evaluation of driving for the purpose of improving a driving time in a circuit racecourse. The driving evaluation device includes an evaluation section extractor 24 that detects a deceleration section and an acceleration section in cornering, a tire friction circle-load factor calculator 27 that calculates, based on a front-rear acceleration and a lateral acceleration, a tire friction circle and a tire load factor in the deceleration section and those in the acceleration section, and a skill deficiency evaluator 28 that evaluates driving based on the tire friction circle and the tire load factor in the deceleration section and those in the acceleration section.