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KR-20260066390-A - BRAKE APPARATUS FOR VEHICLE

KR20260066390AKR 20260066390 AKR20260066390 AKR 20260066390AKR-20260066390-A

Abstract

A vehicle braking device is disclosed. The vehicle braking device of the present invention is characterized by comprising: a front wheel EMB (Electro-Mechanical Brake) that brakes a vehicle using a first motor; a rear wheel EMB that brakes a vehicle using a second motor; and a main controller that forms a required braking force by distributing regenerative braking force and friction braking force formed on the front wheel EMB or the rear wheel EMB according to the required braking force corresponding to the amount of braking force applied by the driver to the brake pedal.

Inventors

  • 김종성

Assignees

  • 현대모비스 주식회사

Dates

Publication Date
20260512
Application Date
20241104

Claims (10)

  1. Front wheel EMB (Electro-Mechanical Brake) that brakes the vehicle using a first motor; Rear wheel EMB that brakes the vehicle using a second motor; and A vehicle braking device comprising a main controller that forms the required braking force by distributing the regenerative braking force and the friction braking force of the front wheel EMB or the rear wheel EMB according to the required braking force corresponding to the amount of braking force applied by the driver to the brake pedal.
  2. In paragraph 1, A vehicle braking device in which the first motor is a BLDC (Brushless Direct Current) motor and the second motor is a DC (Direct Current) motor.
  3. In paragraph 2, It further includes a rear controller that controls the front wheel EMB and the rear wheel EMB to perform a redundancy function of the main controller, A vehicle braking device in which the main controller and the rear controller are connected to the front wheel EMB and the rear wheel EMB via redundant CAN communication.
  4. In paragraph 3, The vehicle braking device further comprising a motor position sensor that measures the rotation amount of the magnet of the DC motor and transmits it to the rear controller, wherein the rear wheel EMB described above is a rear wheel EMB.
  5. In paragraph 3, A first battery supplying power to any one of the main controller, the rear controller, and the front wheel EMB; and A vehicle braking device comprising the rear controller and the other of the front wheel EMBs, and a second battery supplying power to the rear wheel EMB.
  6. In paragraph 5, The above rear wheel EMB is a vehicle braking device that receives power from the above second battery through the above rear controller.
  7. In paragraph 1, the main controller A vehicle braking device that forms the required braking force into the regenerative braking force when the required braking force is included in a preset first setting range.
  8. In paragraph 7, the main controller If the above required braking force is included in a preset second setting range, the above required braking force is formed from the above regenerative braking force and the above friction braking force, and The above friction braking force is a vehicle braking device in which the friction braking force is the front wheel friction braking force.
  9. In claim 8, the vehicle braking device wherein the main controller performs friction braking according to the vehicle speed being below a preset speed or the battery charge amount of the high-voltage battery, and supplements the required braking force with the friction braking force.
  10. In paragraph 7, the main controller When the above required braking force is included in a preset third setting range, the above required braking force is formed by increasing the friction braking force while decreasing the regenerative braking force, and The above friction braking force is a vehicle braking device comprising at least one of front wheel friction braking force and rear wheel friction braking force.

Description

Vehicle Braking Apparatus The present invention relates to a vehicle braking device. Electro-mechanical brake (EMB) systems have been developed and are widely used. Although EMB systems were originally developed as Electronic Parking Brakes (EPB), their scope of application is expanding to include primary braking, replacing hydraulic brakes. An electric brake system is a device in which a motor-driven actuator is mounted on a brake caliper to directly brake a vehicle using motor driving force, without the medium of brake fluid. A pedal simulator is installed on the driver's pedal to sense the amount of pressure applied by the driver using a sensor and transmit the information to the central controller. The central controller calculates the braking force required for each wheel and sends a braking command to the wheel controllers mounted on each wheel, and the wheel controllers operate the actuators mounted on each wheel to generate braking force electrically. Since the electric brake system enables active braking and independent braking for each wheel, this configuration allows for the performance of all functions required for a braking system (Service Braking, ABS (Anti-lock braking system), VDC (Vehicle Dynamics Control), TCS (Traction Control System), EPB (Electronic Parking Brake), etc.). The background technology of the present invention is disclosed in the ‘Braking device and method for a vehicle’ of Korean Patent Publication No. 10-2021-0148635 (December 8, 2021). FIG. 1 is a block diagram of a vehicle braking device according to one embodiment of the present invention. FIG. 2 is a diagram showing an example of braking distribution according to one embodiment of the present invention. Hereinafter, an embodiment of a vehicle braking device according to an embodiment of the present invention is described. 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. The present invention may be implemented in various different forms and is not limited to the embodiments described herein. Furthermore, in order to clearly explain the invention in the drawings, parts unrelated to the description have been omitted, and similar parts throughout the specification have been given similar reference numerals. Throughout the specification, when a part is described as "including" a certain component, this means that, unless specifically stated otherwise, it does not exclude other components but may include additional components. The implementations described herein may be implemented, for example, as methods or processes, devices, software programs, data streams, or signals. Even if discussed only in the context of a single form of implementation (e.g., discussed only as a method), the implementation of the discussed features may also be implemented in other forms (e.g., devices or programs). Devices may be implemented in appropriate hardware, software, and firmware, etc. Methods may be implemented in devices such as processors, which generally refer to processing devices including, for example, computers, microprocessors, integrated circuits, or programmable logic devices. FIG. 1 is a block diagram of a vehicle braking device according to one embodiment of the present invention. Referring to FIG. 1, a vehicle braking device according to one embodiment of the present invention may include a plurality of EMBs (Electro-Mechanical Brakes) (100, 200, 300, 400), a main controller (600), a rear controller (700), a sensor assembly (500), a first battery (910), and a second battery (920). The EMB can generate braking force using a motor. Since the EMB does not use hydraulics, it has a fast response speed and is more environmentally friendly than hydraulic brakes (not shown). The EMB can generate braking force according to the control command of the main controller (600) or the rear controller (700), and can prevent the wheel from locking up by repeatedly changing the braking force. Multiple EMBs may be provided. The EMBs may be installed on each wheel of the left front wheel, right front wheel, left rear wheel, and right rear wheel to generate different braking forces. The EMBs may include a left front wheel EMB (100), a right front wheel EMB (200), a left rear wheel EMB (300), and a right rear wheel EMB (400). The left front wheel EMB (100) can be installed on the left front wheel to generate friction braking force. The left front wheel EMB (100) may include a left front wheel controller (110) and a left front wheel EMB module (120). That is, the left front wheel controller (110) for controlling the left front wheel EMB module (120) can be inte