Dual-Controller Brake Architecture for Single-Fault Braking Continuity
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing braking systems with electro-hydraulic and electromechanical partial braking systems are prone to a complete loss of electrical braking power due to potential faults, leading to a high probability of failure.
Innovation Solution
A braking system with two independent control units and power supplies, where one control unit controls the electromechanical system and the other controls the electro-hydraulic system, connected via separate communication buses, ensuring that even in the event of a single electrical fault, both systems can operate independently to maintain braking functionality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single control unit controls both electro-hydraulic and electromechanical partial braking systems, then the system structure is simplified, but the reliability decreases due to high probability of complete loss of electrical braking power
Solution Approach 1:
The control system is divided into two independent control units: a first control unit for the electromechanical partial braking system and a second control unit for the electro-hydraulic partial braking system. Each control unit has its own independent power supply and communication bus, allowing them to operate independently. This segmentation ensures that a fault in one control unit does not affect the other, thereby maintaining braking functionality and improving reliability.
2Reliability
If two independent control units with separate power supplies are used, then the reliability of braking power is improved, but the device complexity increases
Solution Approach 1:
The system is segmented into two independent control units, each with its own power supply and communication bus. This segmentation allows the control systems to operate independently, ensuring that a fault in one unit does not compromise the other. The first control unit manages the electromechanical partial braking system while the second control unit manages the electro-hydraulic partial braking system, maintaining reliability even with increased structural complexity.
3Device complexity
If a single communication bus is used for both control units, then the communication structure is simplified, but the reliability decreases due to potential communication failures
Solution Approach 1:
The communication system is divided into two separate communication buses: a primary communication bus for the first control unit and a secondary communication bus for the second control unit. Each bus is dedicated to its respective control unit, ensuring that communication failures in one bus do not affect the other. This segmentation maintains reliable control signal transmission between the control units and the wheel brakes.
Data Source
Figure 1
Figure 2
AI summary
The invention relates to a brake system (100) for a motor vehicle, having an electrohydraulic partial brake system with hydraulically actuated wheel brakes (106, 108) and an electromechanical partial brake system with electromechanically actuated wheel brakes (148, 150), wherein the brake system has two control units (200, 300) and two power supplies (160, 162) which are independent of one another, wherein a first of the control units (200) is designed to control the electromechanical partial brake system and a second of the control units (300) is designed to control the electrohydraulic partial brake system, wherein the first control unit (200) is supplied with power exclusively by a first of the power supplies (160) and wherein the second control unit (300) is supplied with power exclusively by a second of the power supplies (162).