Vehicle Driving Mode Switching With Adaptive Following Distance
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Solution Overview
Problem
Conventional automated driving technologies do not account for the control of inter-vehicle distance during mode switching, which can lead to inappropriate vehicle states during transitions between different driving modes.
Innovation Solution
A vehicle control device and method that includes a recognizer and a driving controller, which adjusts the inter-vehicle distance based on recognized surrounding situations and mode changes, allowing the vehicle to switch between different driving modes by designating a longer target inter-vehicle distance when switching from a first driving mode to a second driving mode in specific states, ensuring safe and appropriate vehicle control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the driving mode is switched from the first driving mode to the second driving mode, then the automation degree is reduced and the vehicle requires manual intervention, but the inter-vehicle distance control becomes inappropriate during the switching period
Solution Approach 1:
The system performs preliminary action by setting the target inter-vehicle distance to a longer value before the mode switching is completed. This ensures that during the transition period from automated to manual driving mode, the vehicle maintains a safer distance from the preceding vehicle, preventing potential collisions that could occur if the distance control were not adjusted in advance of the mode change.
2Reliability
If the target inter-vehicle distance is set to the second inter-vehicle distance immediately during mode switching, then the safety margin is increased, but the vehicle stability during transition is reduced
Solution Approach 1:
The system applies dynamics by making the target inter-vehicle distance adjustable and time-dependent during the mode switching period. Rather than abruptly changing to the second inter-vehicle distance, the system dynamically transitions the distance parameter, allowing the vehicle to adapt smoothly to the mode change while maintaining appropriate safety margins throughout the transition.
3Device complexity
If the driving mode switching is implemented without adjusting inter-vehicle distance, then the device complexity is reduced, but the vehicle control appropriateness during switching deteriorates
Solution Approach 1:
The system implements parameter changes by modifying the target inter-vehicle distance parameter during mode switching. This is achieved by changing the distance parameter from the first inter-vehicle distance to the second inter-vehicle distance through a transition process that sets the target distance to a longer value during the switching period, improving control appropriateness without requiring complex additional hardware.
Data Source
AI summary
A vehicle control device includes a recognizer configured to recognize a surrounding situation of a host vehicle and a driving controller configured to control one or both of steering and a speed of the host vehicle. The driving controller designates an inter-vehicle distance from the preceding vehicle that travels in front of the host vehicle as a first inter-vehicle distance when the host vehicle is allowed to travel in a first driving mode, designates an inter-vehicle distance from the preceding vehicle as a second inter-vehicle distance when the host vehicle is allowed to travel in a second driving mode, and designates the target inter-vehicle distance from the preceding vehicle in the second driving mode as a longer distance between the first inter-vehicle distance and the second inter-vehicle distance when the driving mode is switched from the first driving mode to the second driving mode.