Emergency Brake Pressure Release After False AEB Detection
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Solution Overview
Problem
Existing brake systems in vehicles without electromechanical boosters rely solely on driver assistance systems for autonomous braking, leading to frequent false-positive detections and heavy braking, which can result in hazardous situations.
Innovation Solution
A brake system that integrates an anti-lock braking system with an autonomous emergency braking system to quickly recognize and correct false-positive detections by reducing brake pressure through a hydraulic unit, using sensor data fusion and direct bypass connections for rapid intervention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If autonomous emergency braking system activates brake pressure quickly, then stopping distance is reduced, but false-positive detections cause hazardous situations
Solution Approach 1:
The system performs preliminary assessment by continuously updating the object list with newly added sensor data before finalizing braking intervention. This allows the system to prepare for potential false positives by having updated situational awareness ready, enabling quick correction without compromising the initial rapid response
Solution Approach 2:
The system implements continuous feedback by updating the object list with new sensor data and reassessing whether the braking event is still present. This feedback loop enables the system to detect false positives and cancel unnecessary braking interventions, resolving the contradiction between rapid response and accuracy
2Measurement precision
If autonomous emergency braking system uses sensor data for detection, then braking accuracy is improved, but response time is increased due to data processing
Solution Approach 1:
The system continuously updates the object list with newly added sensor data in advance, so that when a braking event is detected, the assessment can be quickly verified or corrected without significant time loss. This preliminary data preparation reduces the effective processing time during critical moments
Solution Approach 2:
The system rushes through the verification process by checking updated sensor data immediately after braking event detection. If the object list has been updated with new data that confirms or refutes the braking event, the system quickly makes a decision, minimizing the time penalty associated with accurate measurement
3Speed
If hydraulic unit reduces brake pressure quickly, then false-positive correction is improved, but system complexity increases
Solution Approach 1:
The hydraulic unit is designed to serve multiple functions: it can both build up brake pressure for normal braking operations and quickly reduce pressure for false-positive correction. This multi-functionality allows rapid pressure reduction without requiring a separate dedicated release mechanism, thereby limiting the increase in system complexity
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The system enables rapid correction of false-positive braking events, reducing brake pressure within 30 milliseconds, thereby preventing unnecessary braking and enhancing safety by minimizing vehicle velocity changes and collision risks, especially in uncertain driving scenarios.
Implementation Method 1
an actuating device 2, which is designed to generate a hydraulic force
Implementation Method 2
a hydraulic unit (solenoid valve unit), the hydraulic unit being designed to reduce a hydraulic force applied to at least one wheel brake
Data Source
AI summary
A brake system for a motor vehicle. The brake system includes an autonomous emergency braking system to ascertain an object list using sensor data and continuously update the object list based on newly added sensor data, to ascertain a braking event based on the object list at a first point in time and to activate the actuating device to generate a hydraulic force if a braking event is ascertained, to recognize whether the braking event is still present based on the updated object list at a second point in time, after the first point in time; and to activate the hydraulic unit directly to reduce the hydraulic force applied to at least one wheel brake of the motor vehicle if the braking event is no longer present.