Electromechanical Brake Controller Merging Sensors for Failover
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Solution Overview
Problem
Existing electro mechanical brake systems for autonomous vehicles face challenges in maintaining minimum braking performance even when components fail, leading to increased complexity, weight, and cost due to redundancy measures.
Innovation Solution
The electro mechanical brake system incorporates multiple pedal sensors, brake controllers, and Electro Mechanical Brakes (EMBs) powered by separate batteries, allowing for failover mechanisms to ensure minimum braking performance even if some components fail.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If redundancy is provided to the electro mechanical braking system to ensure safety, then reliability is improved, but device complexity increases
Solution Approach 1:
The patent merges the functions of multiple pedal sensors into a single brake controller that processes signals from all sensors. The brake controller integrates failure detection logic and coordinates with the EMB to maintain braking functionality, reducing the need for separate redundant control units while ensuring safety through coordinated operation.
Solution Approach 2:
The brake controller is designed with multi-functionality, serving as both a signal processing unit for multiple pedal sensors and a failure detection system. It can operate in normal mode with all sensors and in failure mode when one sensor malfunctions, providing universal braking control across different operational states without requiring separate dedicated systems.
2Reliability
If redundancy is provided to the electro mechanical braking system to ensure safety, then reliability is improved, but weight increases
Solution Approach 1:
The patent combines multiple sensing functions into a single integrated brake controller unit that handles signals from multiple pedal sensors. This consolidation eliminates the need for separate redundant control units and reduces overall system weight while maintaining the ability to detect and respond to sensor failures.
3Reliability
If redundancy is provided to the electro mechanical braking system to ensure safety, then reliability is improved, but cost increases
Solution Approach 1:
The patent merges multiple sensing and control functions into a single brake controller unit, reducing the total number of components that need to be manufactured and assembled. This integration lowers manufacturing complexity and cost while maintaining safety through the controller's ability to process multiple sensor inputs and detect failures.
Solution Approach 2:
The brake controller is designed as a universal unit that can handle normal operation with all sensors and failure conditions with reduced sensors. This multi-functionality eliminates the need for separate redundant control systems, reducing overall component count and manufacturing cost while ensuring safety across all operational states.
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 configuration ensures minimum braking performance is maintained in failure situations while reducing complexity, weight, and cost by minimizing the need for redundant components.
Implementation Method 1
a first Electro Mechanical Brake (EMB), a second EMB, a third EMB, and a fourth EMB respectively installed in a plurality of wheels of a vehicle and configured to provide a braking force to the plurality of wheels of the vehicle
Data Source
AI summary
Disclosed is electro mechanical brake system including: first pedal sensor, second pedal sensor, and third pedal sensor configured to detect pedal effort applied to brake pedal and generate first braking signal, second braking signal, and third braking signal; first EMB, second EMB, third EMB, and fourth EMB respectively installed in plurality of wheels of vehicle and configured to provide braking force to plurality of wheels of vehicle; first brake controller connected to first pedal sensor, and configured to obtain first target braking torque based on first braking signal and transmit first target braking torque to first, second, third and fourth EMBs; and second brake controller connected to first pedal sensor, second pedal sensor, and third pedal sensor, and configured to obtain second target braking torque based on first braking signal, second braking signal, and third braking signal and transmit second target braking torque to first, second, third and fourth EMBs.