Cross-Traffic Alert Active Braking for Parking Exit Collision Avoidance
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing methods for avoiding collisions with cross-traffic when exiting a parking space may fail to prevent accidents if the driver does not react to warning messages in time, as they rely solely on driver intervention and do not ensure automatic braking in all scenarios.
Innovation Solution
An active brake fraction function is integrated into the Cross-Traffic Alert system, which detects cross-traffic objects and automatically brakes the vehicle to a standstill before the traffic path, calculating the latest possible braking time to avoid collisions and allowing the driver to override the function if needed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If automatic braking intervention is implemented to prevent collisions, then collision avoidance reliability is improved, but driver control freedom deteriorates
Solution Approach 1:
The system dynamically adjusts the braking intervention based on real-time detection of cross-traffic risks and calculates the last possible braking time point adaptively. The automatic braking is activated only when necessary and only if initiated before the calculated deadline, allowing the system to balance safety intervention with driver autonomy dynamically rather than through fixed rules
Solution Approach 2:
The system continuously monitors the situation, detects cross-traffic objects, calculates the last possible braking time point based on current speed and distance, and provides feedback to the driver through warnings. The braking intervention is triggered based on this feedback loop, ensuring that automatic braking occurs only when the calculated timing conditions are met, thus maintaining both reliability and driver control
2Length of stationary object
If automatic braking is activated at the last possible moment, then braking distance is reduced, but detection and reaction time requirement increases
Solution Approach 1:
The system performs preliminary detection of cross-traffic objects and continuously calculates the last possible braking time point in advance based on current vehicle speed and distance to potential hazards. By preparing the braking intervention timing calculation beforehand and monitoring conditions continuously, the system can execute braking at the optimal last moment without requiring excessive reaction time during the actual emergency
Solution Approach 2:
The system replaces the mechanical reaction time limitation of human drivers with electronic detection and calculation systems that continuously monitor cross-traffic, compute the last possible braking time point, and trigger automatic braking instantaneously when conditions are met, thereby overcoming the physical limitations of human reaction time
3Adaptability or versatility
If automatic braking intervention is prevented when accelerator pedal activation exceeds threshold, then driver intent recognition is improved, but collision avoidance capability deteriorates
Solution Approach 1:
The system dynamically evaluates the accelerator pedal activation rate and gradient to recognize driver intent. When the activation exceeds predefined thresholds, the system interprets this as urgent driver intent to accelerate and prevents automatic braking intervention. This dynamic adaptation allows the system to distinguish between normal acceleration and emergency avoidance scenarios, balancing driver intent recognition with collision avoidance capability
Data Source
AI summary
A method avoids a collision of a motor vehicle initially moving backwards or forwards, in particular leaving a parking place, with cross-traffic. The method detects whether there is a risk of collision with cross-traffic; determines a last possible braking intervention for ensuring avoidance of collision when there is a risk of collision with cross-traffic; and performs an automatic last possible initiation of a braking intervention for preventing the collision in the event of an identified risk of collision, if avoidance of the collision is ensured thereby.