Electromechanical Brake Control With Dual-Signal Consistency Check
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Solution Overview
Problem
Conventional electromechanical brake systems with dual control modules and multi-brake devices struggle to accurately and timely respond to external brake demands, particularly in high-level functional security systems and failure scenarios.
Innovation Solution
A vehicle brake system with redundant control modules and electromechanical brake devices, where each wheel end controller responds only to consistent control signals from at least two control modules, ensuring accurate and timely braking through consistent signal verification and safety mode operation in case of module failure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If redundant dual control modules are implemented for high-level functional security, then reliability is improved, but response time to external brake demands deteriorates due to signal consistency verification requirements
Solution Approach 1:
The control modules perform preliminary verification of signal consistency between the first and second control modules before executing braking commands. By checking signal consistency in advance through the predetermined logic, the system ensures reliable operation while minimizing delays in responding to external brake demands.
2Measurement precision
If signal consistency verification between multiple control modules is implemented, then braking accuracy is improved, but system complexity increases
Solution Approach 1:
The wheel end controller receives control signals from multiple control modules and implements feedback by verifying signal consistency before execution. This feedback mechanism ensures braking accuracy by comparing signals from different sources while maintaining manageable system complexity through structured verification logic.
Solution Approach 2:
The control modules perform self-verification of signal consistency internally before sending commands to the wheel end controller. This self-service approach improves braking accuracy through automated consistency checks while reducing the overall system complexity by distributing verification responsibilities across existing control components.
3Reliability
If wheel end controller only responds to consistent signals from multiple control modules, then safety is improved, but ease of operation deteriorates due to restricted response conditions
Solution Approach 1:
The wheel end controller acts as an intermediary that receives and verifies control signals from multiple control modules before execution. This intermediary role improves safety by filtering inconsistent signals while maintaining operational simplicity through a unified response interface that automatically handles verification logic.
Data Source
AI summary
The invention provides a vehicle's brake system and a method for braking a vehicle. The brake system comprises at least two control modules and a plurality of electromechanical brake devices. Each electromechanical brake device comprises a wheel end controller, a motor actuator and a friction brake driven by the motor actuator. Each control module receives a brake demand from a brake demand generating device and sends a control signal to each wheel end controller according to the brake demand. Each wheel end controller only responds to the control signals when the control signals received from the two control modules are consistent.