Brake System Controller Position Mismatch Detection
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Solution Overview
Problem
The existing brake system for vehicles, which uses electric brake devices for both wheels controlled by individual controllers via an on-vehicle network, faces issues when the controllers are wrongly associated, leading to unintended braking forces being applied to the wrong wheels, reducing the system's utility.
Innovation Solution
A brake system that includes a pair of electric brake devices for each wheel, individual controllers, a central controller, and a position-change determining device. The central controller transmits control commands with destination information, and the position-change determining device identifies position changes based on the vehicle's turning behavior, ensuring correct association of controllers with brake devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If individual controllers are associated with electric brake devices via an on-vehicle network, then centralized control capability is improved, but controller-position mismatch risk increases
Solution Approach 1:
The system implements feedback by detecting vehicle turning behavior and comparing it with the association between individual controllers and electric brake devices. When a mismatch is detected through abnormal turning behavior, the system identifies and corrects the controller-position mismatch, ensuring reliable operation.
Solution Approach 2:
The system performs self-diagnosis by autonomously detecting controller-position mismatches through turning behavior analysis and automatically correcting the association between individual controllers and electric brake devices without external intervention, maintaining system reliability.
2Measurement precision
If individual controllers are installed separately for each wheel, then braking control precision is improved, but system complexity increases
Solution Approach 1:
The central controller performs multiple functions including transmitting control commands to individual controllers, receiving status information, detecting controller-position mismatches through turning behavior analysis, and correcting association errors. This multi-functionality manages system complexity while maintaining precise braking control.
3Ease of manufacture
If controller association is established without position verification, then ease of installation is improved, but operational safety deteriorates
Solution Approach 1:
The system performs preliminary verification by detecting controller-position mismatches through turning behavior analysis before executing braking operations. This preliminary detection and correction mechanism ensures operational safety while maintaining installation simplicity.
Data Source
AI summary
A brake system including: (a) a pair of electric brake devices respectively for right and left wheels; (b) a pair of individual controllers respectively associated with the electric brake devices; (c) a central controller communicable with the individual controllers; and (d) an on-vehicle network to which the central and individual controllers are connected, wherein the central controller transmits, via the on-vehicle network, control commands to the individual controllers as signals containing destination information of the respective individual controllers, wherein each individual controller controls an associated one of the electric brake devices according to the control command based on the signal containing the destination information of its own, and wherein the brake system further includes a position-change determining device configured to determine, based on a turning behavior of a vehicle, that positions of the individual controllers are mutually changed with respect to the association with the electric brake devices.