KR-102960184-B1 - SYSTEM AND METHOD FOR CONTROLLING ELECTRONIC PARKING BRAKE OF VEHICLE

KR102960184B1KR 102960184 B1KR102960184 B1KR 102960184B1KR-102960184-B1

Abstract

A control system for an electronic parking brake according to one aspect of the present invention comprises a driving module of a vehicle, a relay connected to supply power from a battery to the driving module, an EPB (Electronic Parking Brake) switch, and a controller connected to the relay and the EPB switch. When the ON state of the EPB switch is detected while the vehicle is in the ON state, the controller controls the relay based on the vehicle speed to cut off power to the driving module and operate the electronic parking brake (EPB).

Inventors

김용은
박성민
이호성
김지민
임택규
손영욱

Assignees

한국자동차연구원

Dates

Publication Date: 20260507
Application Date: 20230525

Claims (10)

Vehicle drive module; A relay connected to supply power from the battery to the above-mentioned drive module; EPB (Electronic Parking Brake) switch; and It includes a controller connected to the above relay and EPB switch, and The above controller is, When the ON state of the above vehicle is ON and the ON state of the EPB switch is detected, the relay is controlled based on the vehicle speed to cut off the power to the drive module and operate the electronic parking brake (EPB). The above controller is, When the engine of the vehicle is turned on and the ON state of the EPB switch is detected, and the vehicle speed is above the critical vehicle speed, it is determined to be an emergency situation and the relay is turned OFF, thereby cutting off the power supplied to the drive module. The above-mentioned drive module is a component related to the operation of Excel, and A control system for an electronic parking brake characterized in that when the power to the above-mentioned drive module is cut off, the accelerator value is '0' or not input, and the controller operates the above-mentioned electronic parking brake (EPB).
In paragraph 1, The above controller is, A control system for an electronic parking brake characterized by cutting off the power supplied to the drive module by turning off the relay when the vehicle speed is not received.
In paragraph 1, The above-mentioned drive module is, A control system for an electronic parking brake characterized by including at least one of an ECU (Electronic Control Unit), a VCU (Vehicle Control Unit), and an EPCU (Electric Power Control Unit).
In paragraph 1, The above controller is, A control system for an electronic parking brake characterized by cutting off the power to the inverter-battery relay and operating the electronic parking brake (EPB) in at least one of the cases where the vehicle speed is greater than or equal to the critical vehicle speed and where the vehicle speed is not received.
In paragraph 1, The above controller is, A control system for an electronic parking brake characterized by transmitting at least one of a gear N command, an AEB operation command, and an emergency light command to the corresponding device when the electronic parking brake (EPB) is operated.
A step in which the controller determines whether it is necessary to cut off the power to the drive module based on the vehicle speed when the ON state of the EPB switch is detected while the vehicle's ignition is ON; If it is necessary to cut off the power to the above-mentioned drive module, the controller cuts off the power to the drive module by turning off the relay connecting the drive module and the battery; and The above controller includes the step of operating an electronic parking brake (EPB), and In the step of determining whether it is necessary to cut off the power to the above-mentioned drive module, The above controller determines that if the vehicle speed is greater than or equal to the critical vehicle speed, it is an emergency situation and determines that power cutoff of the drive module is required, and The above-mentioned drive module is a component related to the operation of Excel, and In the step of operating the above electronic parking brake (EPB), A method for controlling an electronic parking brake characterized in that when the power to the above-mentioned drive module is cut off, the accelerator value is '0' or not input, and the controller operates the above-mentioned electronic parking brake (EPB).
In paragraph 6, In the step of determining whether it is necessary to cut off the power to the above-mentioned drive module, A control method for an electronic parking brake characterized by the above controller determining that power cutoff of the above drive module is required when vehicle speed is not received.
In paragraph 6, The above-mentioned drive module is, A method for controlling an electronic parking brake characterized by including at least one of an ECU (Electronic Control Unit), a VCU (Vehicle Control Unit), and an EPCU (Electric Power Control Unit).
In paragraph 6, In the step of cutting off the power to the above-mentioned drive module, A control method for an electronic parking brake characterized by the above controller cutting off the power to the inverter-battery relay and operating the electronic parking brake (EPB).
In paragraph 6, In the step of operating the above electronic parking brake (EPB), A method for controlling an electronic parking brake, characterized in that the above controller transmits at least one of a gear N command, an AEB operation command, and an emergency light command to the corresponding device.

Description

System and Method for Controlling Electronic Parking Brake of Vehicle The present invention relates to a control system and method for an electronic parking brake, and more specifically, to a control system and method for an electronic parking brake that enables the operation of the electronic parking brake (EPB) by cutting off the power to a module associated with the accelerator when the EPB switch is turned on while the vehicle is in motion. The Electronic Parking Brake (EPB) allows the parking brake to be engaged with a simple button operation without the driver having to manually operate it, and it maintains the vehicle's parked or stationary state by automatically controlling the braking force applied to the wheels to prevent the vehicle from rolling backward when stopped or starting on a hill. It is equipped with an application switch (hereinafter referred to as AS) that activates the electronic parking brake (EPB) and a release switch (hereinafter referred to as RS) that switches to an inactive state. When the operating switch (AS) is turned ON by the driver, the electronic parking brake is engaged, and when the release switch (RS) is turned ON, the electronic parking brake is released. The electronic parking brake (EPB) is designed not to operate when the driver is pressing the accelerator for operational safety. Therefore, when emergency braking is required, if conditions such as accelerator jamming occur when pressing the electronic parking brake (EPB), the electronic parking brake (EPB) does not operate, and there is a risk of an accident. The background technology of the present invention is disclosed in the ‘EPB driving control method’ of Korean Registered Patent Publication No. 10-1822815 (published Jan. 29, 2018). FIGS. 1 and FIGS. 2 are drawings for explaining a control system of an electronic parking brake according to an embodiment of the present invention. FIG. 3 is a flowchart illustrating a control method for an electronic parking brake according to an embodiment of the present invention. Hereinafter, a control system and method for an electronic parking brake according to an embodiment of the present invention will be described in detail with reference to the attached drawings. In this process, the thickness of lines or the size of components shown in the drawings may be exaggerated for clarity and convenience of explanation. Furthermore, the terms described below are defined considering their functions in the present invention, and these may vary depending on the intention or convention of the user or operator. Therefore, the definitions of these terms should be based on the content throughout this specification. FIGS. 1 and FIGS. 2 are drawings for explaining a control system of an electronic parking brake according to an embodiment of the present invention. Referring to FIGS. 1 and 2, a control system for an electronic parking brake according to one embodiment of the present invention includes a driving module (100), a relay (200), an EPB (Electronic Parking Brake) switch (300), and a controller (400). The drive module (100) is configured to drive a vehicle by receiving power from a battery (not shown) and may include an ECU (Electronic Control Unit), VCU (Vehicle Control Unit), EPCU (Electric Power Control Unit), etc. Additionally, the drive module (100) may be a configuration related to the operation of an accelerator. For example, in the case of an electric vehicle, if the power supply to the ECU is cut off, the electric vehicle will not operate. Also, in the case of an electric vehicle, if the power supply to the ECU is cut off, the main relay connecting the electric vehicle's main battery and the inverter responsible for driving is cut off, and the power supply to the inverter responsible for driving is cut off, so no driving force is generated. Also, in the case of an engine vehicle, if the power supply to the ECU is cut off, the driving force of the vehicle is cut off, such as when the engine of the vehicle is turned off. That is, in the case of an engine vehicle, if the power supply to the ECU is cut off, the power to the spark plug is cut off, so ignition does not occur (no spark is produced), and as a result, no driving force is generated. Also, in the case of an engine vehicle, if the power to the driving module (100) controlling the engine is cut off, the driving force of the vehicle is lost. Even if the drive module (100) is cut off, power is supplied to the steering, brake, EPB, etc., so they can operate. The relay (200) may be configured to be connected to supply power from the battery to the drive module (100). The relay (200) is connected to the drive module (100) and may supply power to the drive module (100) when the relay (200) is turned on, and may not supply power to the drive module (100) when the relay (200) is turned off. The EPB switch (300) can switch the electronic parking brake (EPB) to one of the following states: locked (Apply), released, and neutral,