Four-Corner Electromechanical Brake Architecture With Dual Power Backup
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Solution Overview
Problem
Existing electromechanical brake (EMB) systems lack redundant power and signaling capabilities, making them unreliable in the event of a single or dual power loss, which is a critical issue for full, four corner EMB brake systems.
Innovation Solution
A vehicle braking system with dual power networks and temporary power supplies, such as ultra-capacitors, ensures backup power is provided to all four EMB assemblies even in the event of a single or dual power loss, using redundant signaling paths and communication buses to maintain braking functionality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single power network is used for EMB assemblies, then the system complexity is reduced, but the reliability is insufficient in the event of power loss
Solution Approach 1:
The power network is segmented into multiple independent power networks (first power network and second power network), each serving different EMB assemblies. This segmentation ensures that a failure in one power network does not affect the others, thereby improving reliability while maintaining manageable complexity through modular architecture.
Solution Approach 2:
Temporary power supplies are pre-configured and connected to the EMB assemblies before any power loss occurs. When a power network fails, the corresponding temporary power supply immediately activates without requiring complex real-time decision-making, ensuring continuous braking functionality and improving reliability.
2Reliability
If redundant power supplies are added to ensure backup power, then the reliability is improved, but the device complexity increases
Solution Approach 1:
The temporary power supplies are integrated with the existing power network architecture through a unified control module that manages both primary and backup power sources. This merging approach allows the system to achieve redundancy while minimizing complexity by using a centralized control strategy rather than independent control systems for each power source.
Solution Approach 2:
The temporary power supplies are designed to be multi-functional, serving as backup power sources for multiple EMB assemblies simultaneously. This universality reduces the overall number of components needed compared to having dedicated backup supplies for each assembly, thereby improving reliability without proportionally increasing system complexity.
3Reliability
If dual power networks with temporary power supplies are implemented, then the reliability during power loss is improved, but the manufacturing cost increases
Solution Approach 1:
The temporary power supplies are designed as cost-effective, short-duration backup power sources that only need to sustain the braking system until the vehicle comes to a safe stop. By using economical components designed for limited operational duration rather than long-term backup, the system achieves improved reliability during critical power loss events while controlling manufacturing costs.
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 effectively ensures the vehicle can be safely slowed to a stop even with temporary power loss, providing high redundancy and reliability for four corner EMB systems.
Implementation Method 1
a first temporary power supply to backup the first power network, and a second temporary power supply to backup the second power network
Data Source
AI summary
A vehicle braking system may include a first EMB assembly associated with a first wheel, a second EMB assembly associated with a second wheel, a third EMB assembly associated with a third wheel, a fourth EMB assembly associated with a fourth wheel, a control module to control application of signaling and power for operation of the first, second, third and fourth EMB assemblies where the power is provided from a first power network and a second power network, a first temporary power supply to backup the first power network, and a second temporary power supply to backup the second power network.