Redundant Wheel Brake Cylinder for Autonomous Braking Continuity
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Solution Overview
Problem
Existing vehicle braking systems lack complete functional redundancy, which means they cannot ensure autonomous braking even in the event of significant functional impairment or complete failure of hydraulic braking system components, requiring active driver intervention.
Innovation Solution
The development of a braking system with complete functional redundancy, incorporating both autonomous hydraulic and electromechanical/electromagnetic braking systems, which can operate independently and switch between modes to ensure continuous autonomous braking functionality even in the event of component failure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a hydraulic braking system is used for autonomous braking, then braking performance is improved, but system reliability deteriorates due to lack of functional redundancy
Solution Approach 1:
The braking system is divided into two independent subsystems: a hydraulic braking subsystem and an electromechanical braking subsystem. Each subsystem can independently perform autonomous braking functions. This segmentation ensures that if one subsystem fails, the other can still maintain autonomous braking capability, thereby improving reliability without requiring a completely redundant complex system.
Solution Approach 2:
The control device is designed to universally control both the hydraulic braking system and the electromechanical braking system. It can switch between different braking modes (hydraulic only, electromechanical only, or combined) depending on system status and requirements. This multi-functionality allows a single control unit to manage multiple braking approaches, improving reliability while avoiding the need for separate control systems for each braking type.
2Reliability
If functional redundancy is implemented in the braking system, then autonomous braking reliability is improved, but system complexity increases
Solution Approach 1:
The braking system is divided into two independent subsystems: a hydraulic braking subsystem and an electromechanical braking subsystem. Each subsystem can independently perform autonomous braking functions. This segmentation ensures that if one subsystem fails, the other can still maintain autonomous braking capability, thereby improving reliability without requiring a completely redundant complex system.
Solution Approach 2:
The system implements a simplified form of copying by having both hydraulic and electromechanical subsystems that can perform the same autonomous braking function. Rather than creating full duplicates of the entire braking system, the patent uses different technological approaches (hydraulic vs. electromechanical) to achieve the same function, reducing complexity while maintaining redundancy.
3Adaptability or versatility
If both hydraulic and electromechanical braking systems are integrated, then system versatility is improved, but control complexity increases
Solution Approach 1:
The control device is designed to universally control both the hydraulic braking system and the electromechanical braking system. It can switch between different braking modes (hydraulic only, electromechanical only, or combined) depending on system status and requirements. This multi-functionality allows a single control unit to manage multiple braking approaches, improving reliability while avoiding the need for separate control systems for each braking type.
Solution Approach 2:
The control device dynamically adjusts the braking mode based on real-time system conditions. It can transition between hydraulic-only mode, electromechanical-only mode, and combined mode depending on which subsystem is available and what braking performance is required. This dynamic adaptability allows the system to maintain versatility while managing control complexity through intelligent, condition-based mode selection.
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
This solution enables vehicles to maintain autonomous braking capabilities without driver intervention, even in the case of hydraulic braking system component failure, enhancing safety and comfort in fully automated driving scenarios.
Implementation Method 1
a pressure chamber which is delimited by an adjustable first brake piston and is connected to a partial volume of a hydraulic brake circuit in such a way that the first brake piston is adjustable by means of a pressure increased at least in the respective partial volume
Implementation Method 2
an electromechanical or electromagnetic actuator, by means of which a second brake piston is adjustable
Data Source
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AI summary
The invention relates to an electromechanical or electromagnetic wheel brake cylinder (14) for a brake system, which is formed with at least one hydraulic brake circuit (12, 12a, 12b), of a vehicle, having a pressure chamber which is formed in the electromechanical or electromagnetic wheel brake cylinder (14) and which is delimited by an adjustable first brake piston of the electromechanical or electromagnetic wheel brake cylinder (14) and which is connectable to a partial volume of the at least one hydraulic brake circuit (12, 12a, 12b) of the brake system such that the first brake piston is adjustable by means of a pressure which is increased at least in the respective partial volume, wherein the electromechanical or electromagnetic wheel brake cylinder (14) comprises an electromechanical or electromagnetic actuator and comprises a second brake piston which is adjustable by means of operation of the electromechanical or electromagnetic actuator. The invention likewise relates to brake systems for vehicles and to a production method for an electromechanical or electromagnetic wheel brake cylinder for a brake system, which is formed with at least one hydraulic brake circuit, of a vehicle. The invention also relates to methods for the autonomous braking of a vehicle.