Brake Control Apparatus with Dual Communication Lines for Booster State Detection
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Solution Overview
Problem
Current brake control systems face challenges in accurately determining whether an electric booster is in an unsteady state, leading to potential failures in brake force application and vehicle stability.
Innovation Solution
A brake control apparatus is designed with a booster state detection unit that uses two communication lines to transmit signals to a hydraulic controller, allowing for the determination of the booster's unsteady state based on communication states, and includes a backup control unit to ensure reliable brake force application even in unsteady conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single communication line is used to transmit booster state signals, then the device complexity is reduced, but the reliability of determining booster unsteady state deteriorates
Solution Approach 1:
The patent applies local quality by assigning different functions to different communication lines. The first communication line transmits booster state signals under normal conditions, while the second communication line is specifically dedicated to transmitting signals when the booster is determined to be in an unsteady state. This functional differentiation improves reliability without significantly increasing overall system complexity.
Solution Approach 2:
The system performs preliminary action by pre-configuring the second communication line as a backup pathway before any failure occurs. The hydraulic controller continuously monitors the first communication line and has the second communication line ready to activate immediately when booster unsteady state is detected, ensuring uninterrupted signal transmission.
2Reliability
If dual communication lines are implemented for backup control, then the reliability of brake control is improved, but the device complexity increases
Solution Approach 1:
The patent merges the functions of both communication lines into a unified control system managed by the hydraulic controller. The controller integrates signal reception from both lines, processes information from either source, and coordinates the backup control logic, thereby managing complexity through functional integration rather than separate independent systems.
Solution Approach 2:
The hydraulic controller is designed with multi-functionality to handle both normal operation signals via the first communication line and backup control signals via the second communication line. This universal controller manages all brake control functions regardless of which communication line is active, reducing the need for separate dedicated controllers for each mode.
3Reliability
If the booster unsteady state determination is made more accurate, then the reliability of brake force application is improved, but the risk of false operations may increase
Solution Approach 1:
The system implements feedback by continuously monitoring the booster state through the communication lines and comparing detected states against expected operational patterns. The hydraulic controller receives real-time signals from both communication lines and uses this feedback to dynamically adjust control decisions, confirming unsteady state determinations before activating backup control to avoid false operations.
Data Source
AI summary
A brake control apparatus includes a booster configured to increase a driver's operation force on a brake operation member to generate a hydraulic pressure in a master cylinder, a booster state detection unit configured to detect a state of the booster and transmit a corresponding signal, a hydraulic control device configured to control a hydraulic pressure in a wheel cylinder to which the hydraulic pressure from the master cylinder is supplied, a hydraulic controller configured to control the hydraulic control device, first and second communication lines arranged in parallel with each other for transmitting the signal to the hydraulic controller, and a booster unsteady state determination unit provided in the hydraulic controller and configured to determine whether the booster is in an unsteady state based on communication states of the signals transmitted via the first and second communication lines.