Vehicle Speed Pattern Display for Driving Test Optimization
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Solution Overview
Problem
In vehicle running tests, inexperienced drivers struggle to achieve desired conditions within the allowable speed range, often relying on trial and error, which can lead to unsuccessful tests and inefficient exhaust gas management.
Innovation Solution
A vehicle speed pattern display device that shows upper and lower limit speed patterns on a graph, along with a target speed pattern different from the prescribed one, allowing drivers to select from multiple modes (e.g., aggressive or smooth) to optimize exhaust gas production or reduction, using actual, corrected, or calculated speed patterns.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If only the prescribed speed pattern and allowable range are displayed on the graph, then the device complexity is kept simple, but inexperienced drivers cannot determine how to drive the vehicle to achieve the desired condition
Solution Approach 1:
The patent creates a simplified copy of the speed pattern information by displaying a target speed pattern that represents the optimal driving trajectory within the allowable range. This copy provides inexperienced drivers with a clear visual guide without requiring them to interpret complex regulatory patterns, thus improving ease of operation while adding minimal display complexity.
Solution Approach 2:
The target speed pattern acts as an intermediary between the prescribed speed pattern (regulatory requirement) and the driver's control actions. It translates the complex allowable range boundaries into a single, easy-to-follow central trajectory, mediating the information flow from regulation to execution and resolving the contradiction between simplicity and guidance quality.
2Adaptability or versatility
If multiple target speed patterns are provided for different driving modes, then the adaptability to various test conditions is improved, but the device complexity increases
Solution Approach 1:
The system implements dynamic adaptability by allowing the target speed pattern to change based on the selected driving mode (e.g., aggressive or smooth). Rather than providing static patterns, the system dynamically adjusts the target trajectory to match the desired driving characteristics, improving versatility while managing complexity through mode-based organization.
Solution Approach 2:
The patent segments the speed pattern information by dividing it into distinct driving modes (aggressive, smooth, etc.), each with its own target speed pattern. This segmentation allows the system to handle multiple test conditions separately and systematically, improving adaptability while keeping the management of each individual pattern relatively simple and organized.
3Ease of operation
If drivers perform trial and error runs to achieve desired conditions, then the ease of operation is maintained, but the loss of time increases due to repeated unsuccessful attempts
Solution Approach 1:
The system performs preliminary action by pre-calculating and displaying the target speed pattern before the actual driving test begins. This allows drivers to see the optimal trajectory in advance and plan their driving accordingly, eliminating the need for trial and error runs and significantly reducing the time required to achieve desired test conditions while maintaining operational freedom.
Data Source
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AI summary
To make it possible to achieve a run under a desired condition within a predetermined allowable range. A vehicle speed pattern display device 2 displaying upper and lower limit speed patterns H and L set for a predetermined prescribed speed pattern B on a graph G1 having one axis representing a vehicle speed and the other axis representing time or a running distance is adapted to display a target speed pattern S different from the prescribed speed pattern B on the graph G1.