Vehicle Speed Suppression Control for Unintended Start and AEB Margin
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Solution Overview
Problem
Existing autonomous emergency brake (AEB) systems in vehicles may impede smooth driving, particularly during parking, as they do not adequately consider situations beyond normal driving or parking scenarios.
Innovation Solution
A vehicle control apparatus with an unintended start suppression function that includes a distance detection unit, a speed detection unit, and a suppression support unit. The suppression support unit adjusts the operation distance for speed suppression based on whether the unintended start suppression function is operating, ensuring smooth and safe driving.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the AEB operates with a standard operation distance during unintended start suppression, then collision avoidance capability is maintained, but the driver experiences a sense of incongruity and driving smoothness is impeded
Solution Approach 1:
The patent applies dynamics by making the operation distance dynamic rather than fixed. The suppression support unit adjusts the operation distance based on vehicle speed: using a first operation distance when speed is below the threshold and a second operation distance when speed is at or above the threshold. This dynamic adjustment allows the AEB to adapt to different driving conditions, maintaining collision avoidance capability at lower speeds while improving driving smoothness and reducing driver incongruity at higher speeds during unintended start suppression.
Solution Approach 2:
The patent applies parameter changes by modifying the operation distance parameter based on vehicle speed conditions. When the vehicle speed is below the threshold, a first operation distance is used; when the speed reaches or exceeds the threshold, a second operation distance is used. This parameter change strategy allows the system to optimize both safety and driving comfort by adjusting the operational characteristics of the AEB according to the current driving state.
2Ease of operation
If the operation distance is shortened to improve parking driving smoothness, then driving impeded by AEB is reduced, but collision avoidance safety is compromised
Solution Approach 1:
The patent resolves this contradiction by implementing dynamic adjustment of the operation distance based on vehicle speed. During parking driving at low speeds (below threshold), the first operation distance is maintained to ensure collision avoidance safety. When the vehicle accelerates to threshold speed or above, the system switches to the second operation distance, which provides a larger margin and reduces the likelihood of AEB activation, thereby improving driving smoothness without compromising safety at low speeds.
Solution Approach 2:
The patent uses parameter changes to switch between different operation distance values based on speed conditions. This allows the system to maintain a safer, shorter operation distance during low-speed parking maneuvers while transitioning to a longer operation distance at higher speeds, effectively balancing safety requirements with driving smoothness needs across different operational contexts.
Data Source
AI summary
A vehicle control apparatus having an unintended start suppression function of suppressing an unintended start is provided. The apparatus comprises a distance detection unit configured to detect a distance to an obstacle; a speed detection unit configured to detect a speed of an ego-vehicle; and a suppression support unit configured to perform suppression support for the speed of the ego-vehicle based on the speed and the distance to the obstacle, wherein the suppression support unit changes an operation distance for performing the suppression support depending on whether the unintended start suppression function has operated.