Redundant Brake ECU Structure With Dual Motor Position Sensing
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Solution Overview
Problem
Existing brake systems for vehicles, particularly those with integrated dynamic brake systems, face instability and failure risks due to the presence of many electronic devices, which can lead to serious accidents if a part of the system becomes inoperable during driving.
Innovation Solution
The implementation of a redundant electronic control unit assembly structure with independently positioned first and second control units, each equipped with a microcontroller and motor position sensors, ensures that the brake system can operate normally even if one part fails, utilizing redundant printed circuit boards and motor position sensors to maintain system stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an integrated dynamic brake system with multiple electronic devices is used to provide various functions and improve braking power, then braking performance and stability are improved, but the risk of system failure increases due to the presence of many electronic devices
Solution Approach 1:
The electronic control unit is divided into two independent control units (first control unit and second control unit) that are physically separated by a partition. Each control unit has its own microcontroller unit and motor position sensor, allowing independent operation. This segmentation reduces the risk of total system failure since a malfunction in one control unit does not necessarily affect the other.
Solution Approach 2:
The patent implements a redundant control unit structure where the second control unit serves as a backup for the first control unit. This redundancy is designed in advance to cushion against potential failures, ensuring that if one control unit fails, the other can take over to maintain brake system operation and prevent accidents.
2Reliability
If redundant control units are implemented to ensure system operation during failure, then system reliability is improved, but the device complexity and space requirements increase
Solution Approach 1:
Both the first control unit and second control unit are integrated within a single housing structure. The housing contains a partition that separates the two control units into different spaces, allowing them to be physically combined in one assembly while maintaining electrical and functional independence. This merging approach achieves redundancy without requiring completely separate systems.
Solution Approach 2:
The first and second control units are designed with identical functional capabilities, each capable of independently controlling the motor and monitoring motor position. This universality allows either control unit to perform all necessary brake control functions, maximizing the utility of the redundant structure while minimizing overall system complexity.
Data Source
AI summary
The present invention relates to the structure of an electronic control unit (ECU) in a brake system, in which an ECU board that constitutes redundancy is additionally arranged in a symmetrical or asymmetric structure and a plurality of motor position sensors for redundancy are arranged, to prepare for malfunction of the ECU, to thus have an effect of operating the brake system normally by another motor position sensor even if one of the motor position sensors malfunctions.