Vehicle Travel Control System for Seamless Mode Transition
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Solution Overview
Problem
Existing automatic driving systems face challenges in transitioning from full automatic driving to driver-assist modes when the traveling environment worsens, leading to increased driver burden and reduced convenience, as they often require immediate driver intervention without a smooth transition.
Innovation Solution
A travel control system that includes a vehicle speed calculator, mode continuation determiner, and mode continuing unit to evaluate the worsening traveling environment and adjust vehicle speed to ensure safe continuation of automatic driving, allowing a seamless transition from second driving assist mode to first driving assist mode or manual driving mode when necessary.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the traveling environment worsens during second driving assist mode, then the automatic driving operation is limited or transitions to first driving assist mode, but this increases driver burden and reduces convenience
Solution Approach 1:
The system dynamically adjusts the vehicle speed limit for continuing second driving assist mode based on the evaluated level of environmental worsening. Instead of a fixed speed limit, the system calculates an appropriate speed threshold that allows automatic driving to continue safely while accommodating varying environmental conditions, thus reducing unnecessary transitions to first driving assist mode and lowering driver burden
Solution Approach 2:
The system changes the parameter of vehicle speed threshold dynamically based on environmental evaluation. By adjusting the speed limit parameter according to the level of environmental worsening, the system enables flexible continuation of second driving assist mode when conditions permit, rather than forcing transitions to first driving assist mode, thereby maintaining convenience while ensuring safety
2Ease of operation
If the vehicle speed is reduced to allow second driving assist mode to continue, then the convenience of automatic driving is maintained, but the traveling time increases
Solution Approach 1:
The system optimizes the vehicle speed parameter by calculating an appropriate speed limit that balances continuation of second driving assist mode with reasonable travel time. Rather than excessively reducing speed, the system determines a speed threshold that allows automatic driving to continue efficiently while maintaining safety, thus minimizing unnecessary time loss
Solution Approach 2:
The system applies partial speed reduction only when necessary to maintain safety during environmental worsening, rather than implementing excessive or complete speed restrictions. This allows the vehicle to maintain higher speeds when conditions permit, reducing overall travel time while still enabling second driving assist mode continuation when appropriate
Data Source
AI summary
A travel control system for a vehicle includes a vehicle speed calculator, a mode continuation determiner, and a mode continuing unit. The vehicle speed calculator evaluates a level of worsening of a traveling environment and calculates a first vehicle speed on the basis of the level of the worsening of the traveling environment. The mode continuation determiner determines whether it is possible to continue with driving assist control in the second driving assist mode by comparing a second vehicle speed in the second driving assist mode with the first vehicle speed. When it is not possible to continue with the driving assist control in the second driving assist mode, the mode continuing unit lowers the second vehicle speed in the second driving assist mode to the first vehicle speed to allow the driving assist control in the second driving assist mode to continue.