Driving Support Control Device Mode Transition Safety
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Solution Overview
Problem
Recent driving support control systems face challenges in ensuring safe mode transitions among multiple driving support modes without stressing the driver, particularly when the vehicle deviates from the intended traveling course.
Innovation Solution
A driving support control device that repeatedly calculates a target traveling course and prohibits mode transitions if the vehicle's current position deviates beyond a given distance laterally from this course, ensuring safe and stress-free mode switching by preventing unintended movements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If mode transition is permitted without checking vehicle position relative to target traveling course, then ease of operation is improved, but safety deteriorates
Solution Approach 1:
The system performs preliminary verification of vehicle position relative to target traveling course before allowing mode transition. The determination unit checks whether the vehicle is within a predetermined distance from the target traveling course prior to switching to the driving support mode, preventing unsafe transitions before they occur.
Solution Approach 2:
The determination unit acts as an intermediary between the driver's mode selection and the actual mode transition. It mediates the switching process by verifying positional conditions and either permitting or prohibiting the transition based on safety criteria, thus ensuring reliable mode changes.
2Reliability
If mode transition is restricted based on vehicle position, then safety is improved, but ease of operation deteriorates
Solution Approach 1:
The system provides feedback to the driver regarding the status of mode transition. When the vehicle position does not meet the safety criteria, the determination unit prohibits mode transition and can notify the driver, allowing the driver to understand why switching is restricted and take appropriate action.
3Device complexity
If target traveling course is calculated without considering obstacle avoidance, then device complexity is reduced, but object-affected harmful factors increase
Solution Approach 1:
The target traveling course is calculated in advance with consideration of obstacle positions. The course calculation unit determines a safe traveling path that avoids obstacles before the mode transition occurs, ensuring that the vehicle will not move toward unintended positions when switching to driving support mode.
Data Source
AI summary
Disclosed is a driving support control device (ECU) 10 capable of controlling a vehicle 1 in accordance with any one selected from plural driving support modes by a driver. The driving support control device 10 is configured to temporally repeatedly calculate a target traveling course (R1 to R3) along which the vehicle 1 should travel, and to, in a given one (preceding vehicle following mode) of the driving support modes, execute control of causing the vehicle 1 to travel on and along the target traveling course, wherein the driving support control device 10 is operable, in a situation where a current position of the vehicle 1 deviates beyond a given distance dth laterally from the target traveling course, to, even when the driver selects the given driving support mode, prohibit transition to the given driving support mode.