EPB Control Apparatus for Abnormal ESC Vehicle Stopping
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Solution Overview
Problem
Conventional electronic stability control (ESC) systems face limitations in maintaining vehicle stability and improving braking efficiency, particularly during abnormal operations such as automatic vehicle hold (AVH) and hill start assist (HSA), which affects vehicle reliability and increases maintenance costs.
Innovation Solution
A control apparatus for the electronic parking brake (EPB) system that includes an inputter to receive abnormal operation signals from the ESC system, a determiner to assess the operation availability of the EPB system, and a controller to activate the EPB system for braking operations, along with indicators to notify drivers of abnormal states and ongoing braking operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the ESC system performs vehicle stopping control function, then vehicle stability is maintained, but the system shows limits in abnormal operations affecting reliability
Solution Approach 1:
The control apparatus enables the EPB system to perform multiple functions: normal parking brake operation and emergency vehicle stopping control. When the ESC system detects abnormal operation during vehicle stopping control, it triggers the EPB system to take over the braking function, making the brake system universally applicable for both planned parking and emergency stopping scenarios.
Solution Approach 2:
The system performs preliminary detection of abnormal operations in the ESC system before they compromise vehicle safety. The control apparatus continuously monitors ESC operation status and prepares the EPB system to activate immediately when abnormal conditions are detected, ensuring reliability is maintained before failures occur.
2Productivity
If the EPB system is activated for abnormal operations, then braking efficiency is improved, but system complexity increases
Solution Approach 1:
The control apparatus acts as an intermediary between the ESC system and the EPB system. It receives abnormal operation signals from the ESC system, determines EPB availability, and transmits control commands to activate the EPB system. This intermediary layer simplifies the overall system architecture by providing a centralized control logic that coordinates between different subsystems without requiring direct complex integration.
Solution Approach 2:
The control apparatus merges the control functions of the ESC system and the EPB system into a unified emergency stopping control mechanism. When abnormal operations are detected, the system combines the monitoring capability of ESC with the actuation capability of EPB, creating an integrated safety system that improves braking efficiency without requiring separate independent control circuits.
3Loss of information
If indicators are added to notify drivers of abnormal states, then driver awareness is improved, but device complexity increases
Solution Approach 1:
The control apparatus implements feedback mechanisms through indicators that notify drivers of abnormal ESC operations and EPB activation states. When the ESC system detects abnormal conditions or when the EPB system is activated as a result, the control apparatus sends signals to indicators to inform the driver, ensuring continuous feedback about system status and preventing information loss.
Solution Approach 2:
The indicator system uses localized, specific notifications rather than comprehensive system-wide alerts. Each indicator is positioned and configured to provide targeted information about specific abnormal conditions or system states, reducing overall system complexity by implementing only the necessary feedback points rather than monitoring and displaying all possible system parameters.
Data Source
AI summary
Disclosed herein are control apparatus for electronic parking brake system and control method thereof. The control apparatus for electronic parking brake system and control method includes an inputter configured to receive an abnormal operation signal from an electronic stability control (ESC) system when a vehicle stopping control function is abnormally performed in the ESC system; a determiner configured to determine whether an operation availability signal of an electronic parking brake (EPB) system is input from the EPB system, when the abnormal operation signal is input; and a controller configured to transmit a control command to the EPB system to activate the EPB system and have the EPB system perform a braking operation, when the operation availability signal of the EPB is input.