Emergency Braking Control for Changing Collision Targets
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional emergency braking systems face challenges in effectively adapting to changing target objects during an emergency braking process, leading to inefficient collision avoidance due to the need to repeatedly initiate the phased braking approach, which can result in delayed reactions to new collision-relevant objects.
Innovation Solution
The method involves continuously determining the relevance of a target object during an emergency braking process, allowing for a ramp-out phase where braking is gradually reduced if the initial target becomes irrelevant, and resuming braking based on the relevance of subsequent targets, ensuring continuous warning and braking without resetting the warning time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the emergency braking system follows the phased approach (warning phase, haptic warning phase, emergency braking phase) for each new target object, then the driver is adequately warned and rear-end collision risk is reduced, but the reaction time to new emerging target objects is delayed
Solution Approach 1:
The patent applies dynamics by making the warning threshold adaptive rather than fixed. The control unit dynamically adjusts the warning threshold based on whether a target object is still present during the phased braking approach. If the target object disappears before full braking is initiated, the system shortens or eliminates the warning phase, allowing faster response to new emerging objects without compromising safety for genuine collision risks
Solution Approach 2:
The system changes the parameter of warning threshold duration based on the persistence of the target object. The warning threshold is reduced or cancelled when no target object is detected during the phased approach, enabling the system to quickly transition to emergency braking for new objects without being constrained by the full original warning period
2Loss of time
If the warning threshold is reduced or cancelled when no target object is present during the phased braking approach, then the reaction to new emerging objects is faster, but the driver warning and rear-end collision prevention may be compromised
Solution Approach 1:
The system continuously monitors the presence of target objects during the phased braking approach and uses this feedback to dynamically adjust the warning threshold. The control unit receives ongoing sensor data about target objects and modifies the braking phase progression accordingly, ensuring adequate driver warning when objects are present while enabling fast response when objects disappear
Solution Approach 2:
The warning threshold is made dynamic rather than static, adjusting its duration based on real-time detection of target objects. This dynamic adaptation ensures the system maintains safety when objects are present (full warning phase) while enabling rapid response when objects disappear (reduced/cancelled warning phase)
Data Source
AI summary
A method for braking a vehicle detects an object in a surrounding of the vehicle. The method determines if a collision between the vehicle and the detected object is imminent, where the detected object is treated as a collision-relevant first target-object in case a collision is imminent. An emergency braking process is initiated if the object is treated as a collision-relevant first target-object, by initiating a warning to a driver of the vehicle, in a first warning phase, initiating a braking of the vehicle with a predetermined braking request. During the braking process, it is continuously determined if the first target-object is still collision-relevant, and, in case the first target-object becomes collision-irrelevant during carrying out the braking process the braking phase is aborted, where the braking process request is decreased in an additional ramp-out phase, while determining if a collision between the vehicle and the detected object is imminent.