Electro-Mechanical Brake Release Control for Faster ABS Decompression
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Solution Overview
Problem
Electro mechanical brakes (EMBs) experience slow decompression responses due to inertial forces and torque ripples, which deteriorate the operation performance of Anti-lock Brake Systems (ABS) compared to hydraulic brakes.
Innovation Solution
A brake system that includes an electro mechanical brake with a motor and a controller configured to provide current for reverse driving torque to the motor based on the torque value at the start of brake release, using preset reference torque values and corresponding current values to enhance decompression response.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the motor of the electro mechanical brake starts rotating in the opposite direction during decompression, then the brake can release from the braking state, but inertial force and torque ripples are generated which slow down the decompression response
Solution Approach 1:
The controller applies a reverse torque to the motor during decompression to counteract the inertial force and torque ripples generated by the motor's rotation. This preliminary anti-action prevents the harmful effects from slowing down the decompression response, enabling the EMB to achieve fast decompression speed comparable to hydraulic brakes.
2Reliability
If the decompression response of the electro mechanical brake is slow, then the brake can operate, but the operation performance of the Anti-lock Brake System deteriorates compared to hydraulic brake
Solution Approach 1:
By applying reverse torque during decompression, the system eliminates the slow decompression response that would otherwise deteriorate ABS performance. This ensures the EMB-based ABS system achieves operation performance comparable to traditional hydraulic brake systems.
Solution Approach 2:
The controller continuously monitors the motor's rotational speed and torque during decompression, and adjusts the reverse torque application in real-time based on feedback signals. This feedback control ensures optimal decompression response while maintaining reliable ABS operation performance.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution improves the decompression response of EMBs, preventing operation performance deterioration of ABS systems and enhancing the braking system's overall responsiveness to match or exceed that of hydraulic brake systems.
Implementation Method 1
A brake system according to an aspect of the disclosure may include: an electro mechanical brake provided with a motor and configured to brake a wheel of a vehicle based on a driving control of the motor
Data Source
AI summary
A brake system may include: an electro mechanical brake provided with a motor and configured to brake a wheel of a vehicle based on a driving control of the motor; and a first controller configured to control the electro mechanical brake to provide current for reverse driving torque to the motor, based on a torque value of the motor at a time at which the motor starts being driven in a brake release direction according to a signal for operating an anti-lock brake system of the vehicle.