ABS Control via Real-Time Brake Corner Friction Estimation
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Solution Overview
Problem
Conventional vehicle braking systems face challenges in accurately monitoring brake corners, which can affect the performance of anti-lock braking systems (ABS) due to variations in brake corner conditions such as temperature, pressure, and torque.
Innovation Solution
A method and system that utilize real-time data from sensors to determine apparent friction at the brake corner by processing brake corner temperature, pressure, and torque data, along with deceleration parameters, and adjust for noise and temperature corrections, to enable precise control of the ABS system, including determining wheel slip percentage and activating/deactivating the ABS as needed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional hydraulic actuators with basic electronic controls are used for ABS, then the system structure remains simple, but the accuracy of brake corner monitoring deteriorates
Solution Approach 1:
The patent segments the monitoring system into multiple independent sensor modules, each dedicated to measuring specific brake corner parameters (temperature, pressure, torque) separately. This segmentation enables high-precision monitoring of each parameter independently while keeping individual sensor modules relatively simple in structure.
Solution Approach 2:
The patent introduces a controller as an intermediary that receives data from multiple sensors and processes it to determine apparent friction. This intermediary component coordinates the information from various sensors without requiring complex direct integration between all sensor components.
2Measurement precision
If real-time temperature, pressure, and torque data are collected and processed, then the precision of apparent friction determination is improved, but the computational complexity and data processing requirements increase
Solution Approach 1:
The patent implements feedback by continuously monitoring brake corner conditions (temperature, pressure, torque) and using this real-time data to dynamically determine apparent friction. This feedback loop allows the system to adapt to changing conditions while processing data in a structured, repeatable manner that manages complexity.
Solution Approach 2:
The patent transforms multiple physical parameters (temperature, pressure, torque) into a single derived parameter (apparent friction) through computational processing. This parameter transformation consolidates complex multi-parameter data into a meaningful control parameter that directly informs ABS operation.
3Reliability
If noise removal and temperature correction are applied to sensor data, then the reliability of brake corner monitoring is improved, but the processing time and computational load increase
Solution Approach 1:
The patent applies noise removal and temperature correction as preliminary processing steps that are automatically performed on sensor data before it is used for apparent friction calculation. By preprocessing the data in advance through standardized correction algorithms, the system ensures reliable data quality without requiring complex real-time processing during critical braking events.
Data Source
AI summary
A method of operating an anti-lock braking system includes that real-time brake corner temperature data, real-time brake corner pressure data real-time brake corner torque data, and deceleration parameters of the vehicle are detected. The method also includes that an apparent friction at the brake corner is determined in response to at least the real-time brake corner temperature data, the real-time brake corner pressure data, the real-time brake corner torque data, and the deceleration parameters of the vehicle.