Collision Avoidance Braking Control Inhibiting Cancellation
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Solution Overview
Problem
Automatic braking systems in collision avoidance assistance devices often cause driver incongruity when an object decelerates or stops in front of a vehicle, leading to a sense of uncertainty due to inconsistent braking amounts.
Innovation Solution
Inhibiting the cancellation of automatic braking when an object is present in front of the vehicle during uncertain collision determination, while allowing cancellation when the object is not present, to maintain consistent braking and minimize driver unease.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the braking amount decreases when collision is determined to be avoided after automatic braking starts, then unnecessary deceleration is reduced, but driver incongruity increases when an object is present in front of the vehicle
Solution Approach 1:
The system applies different braking control strategies based on the local condition of object presence. When an object is detected in front of the vehicle during automatic braking, the braking amount is maintained regardless of collision determination results. When no object is present, the braking amount is reduced if collision is determined to be avoided. This localized adaptation to object presence resolves the contradiction between avoiding unnecessary deceleration and preventing driver incongruity.
Solution Approach 2:
The braking control system dynamically adjusts its behavior based on real-time detection of object presence. The assistance execution unit modifies the braking amount dynamically: maintaining braking when objects are present and reducing braking when objects are absent and collision is avoided. This dynamic adjustment allows the system to optimize both energy efficiency and driver perception under different operational conditions.
2Productivity
If automatic braking is canceled when collision determination changes to non-collision, then unnecessary braking is avoided, but driver incongruity occurs when objects decelerate or stop in front of the vehicle
Solution Approach 1:
The system implements location-based braking control where the presence of an object in front of the vehicle determines whether braking cancellation is permitted. When objects are detected within the vehicle's front region, braking is maintained even if collision determination changes to non-collision. When no objects are present, braking cancellation is allowed for efficiency. This spatially-dependent control strategy resolves the contradiction between braking efficiency and driver perception consistency.
Data Source
AI summary
A collision avoidance assistance device includes an assistance execution unit configured to execute collision avoidance assistance in a case where it is determined that a vehicle will collide with an object, in which, when it is not determined whether the vehicle will collide with the object or not during execution of the automatic braking based on the collision avoidance assistance, the assistance execution unit is configured to inhibit cancellation of the automatic braking in a case where the object is present in front of the vehicle.