Electric Brake Booster Redundancy for Fault-Tolerant Fallback
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Solution Overview
Problem
Existing brake boost systems in automotive and autonomous vehicles face inefficiencies in redundancy, operation, and fallback mechanisms, particularly in integrating redundant power supplies and signaling across different brake systems.
Innovation Solution
A vehicle control system with an electronic brake booster module featuring dual circuit boards and power supplies, a crossover switch, and a vehicle control module that determines fallback conditions based on pedal actuation, angle, and power supply status, ensuring seamless operation and backup functionality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If redundant power supplies and circuit boards are integrated into a single brake booster module, then reliability is improved, but device complexity increases
Solution Approach 1:
The patent combines multiple power supplies, circuit boards, and control functions into a single integrated brake booster module. The first and second power supplies are housed within the same module along with their respective circuit boards (first circuit board for brake actuation, second circuit board for brake modulation), creating a unified redundant system that improves reliability while containing complexity within a single modular unit.
Solution Approach 2:
The brake booster module is designed with multi-functional capabilities where a single module houses both primary and redundant power supplies, actuation control, and modulation control. The system can automatically switch between different power supplies and control boards depending on fault conditions, providing universal functionality that covers both normal and failover operations within one integrated unit.
2Speed
If fallback conditions are automatically determined based on multiple sensor inputs, then system responsiveness is improved, but measurement and detection difficulty increases
Solution Approach 1:
The system pre-establishes fallback conditions and decision logic before faults occur. The vehicle control module is programmed with predetermined criteria for determining when to switch between power supplies and control boards based on sensor inputs from pedal travel sensors, angle sensors, and power supply status monitoring. This preliminary configuration enables automatic, rapid fallback responses without requiring complex real-time analysis during actual fault events.
Solution Approach 2:
The system continuously monitors multiple parameters including pedal travel, pedal angle, and power supply operational status, feeding this information back to the vehicle control module. Based on this feedback, the module automatically determines fault states and triggers appropriate fallback conditions, creating a closed-loop system that responds quickly to changing conditions while simplifying detection through continuous monitoring rather than complex periodic analysis.
Data Source
AI summary
A vehicle control system of a vehicle may include an electronic brake booster module to adjust front brakes of a braking system of the vehicle, a pedal travel sensor and a pedal angle sensor operably coupled to a brake pedal of the vehicle, a vehicle control module that may be configured to monitor the vehicle control system, and a first power supply and a second power supply operably coupled to the electronic brake booster module. The electronic brake booster module may further include a first circuit board to control brake actuation and a second circuit board to control brake modulation, and the vehicle control module or the electronic brake booster module may determine a fallback condition based on a fault state determined based on the pedal actuation, the pedal angle, and operational status of one or more of the first power supply and the second power supply.