Vehicle Collision Warning Timing Linked to Traction Modes
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Solution Overview
Problem
Existing vehicle control systems do not adequately address the increased collision probability when a driver accelerates aggressively on low-friction road surfaces, such as snowy roads, and fail to consider the driving mode's impact on collision avoidance timing.
Innovation Solution
A vehicle control system that integrates a traction control device and a collision avoidance support device, allowing for dynamic adjustment of alarm and brake threshold values based on selected driving modes, thereby optimizing intervention timing for collision avoidance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the alarm determination threshold value is set to a low value to enable early collision avoidance warning, then the alarm activates too early causing driver discomfort, but if set to a high value to avoid false alarms, then the alarm activates too late reducing collision avoidance effectiveness
Solution Approach 1:
The alarm determination threshold value is dynamically adjusted based on the selected driving mode. When snow mode is selected, the threshold is set to a higher value (e.g., 1.5 seconds) compared to normal mode (e.g., 1.0 second), allowing the system to adapt the alarm activation timing to match driver expectations and road conditions
Solution Approach 2:
The system changes the alarm determination threshold parameter according to the driving mode. By linking the threshold value to the selected mode (snow/normal), the system optimizes the balance between early warning and driver comfort for different operating conditions
2Stability of the object's composition
If the driver selects snow mode to prevent wheel slip on snowy roads, then wheel slip is suppressed and vehicle stability is improved, but the driver may still accelerate aggressively increasing collision risk
Solution Approach 1:
The collision avoidance support device receives feedback about the selected driving mode and adjusts its alarm determination threshold accordingly. When snow mode is detected, the system increases the threshold to account for the higher acceleration tendency, creating a closed-loop adaptation to driver behavior patterns
Solution Approach 2:
The system proactively adjusts the alarm threshold in advance based on the selected driving mode before a collision situation occurs. This preliminary adaptation ensures the alarm activates at the appropriate time for the expected driving behavior, preventing both false alarms and missed warnings
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The system effectively outputs collision avoidance alarms at more appropriate timings and automatically initiates braking to reduce collision damage, especially on low-friction surfaces, by considering the driving mode's influence on driver behavior and road conditions.
Implementation Method 1
a wheel speed sensor 22 for detecting a rotation speed of the wheel
Data Source
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AI summary
[Problem to be Solved] To provide a vehicle control system capable of performing intervention control at an appropriate timing in collision avoidance support including warning. [Solution] A vehicle control system 1 includes a traction control device 2 which includes a driving mode switching unit 21 capable of selecting one of a plurality of driving modes, and performs traction control when a slip amount of a wheel exceeds a slip amount determination value set according to a driving mode, and a collision avoidance support device 5 for determining a collision prediction time TTC required for a vehicle to collide with an obstacle detected by an obstacle detection unit 51, and causing an alarm unit 53 to output an alarm therefrom when the collision prediction time TTC is equal to or less than an alarm determination threshold value, and is configured so that the setting of the alarm determination threshold value in the collision avoidance support device 5 is changeable in conjunction with the driving mode selected by the driving mode switching unit 21.