CN-122009121-A - Electromechanical braking system

CN122009121ACN 122009121 ACN122009121 ACN 122009121ACN-122009121-A

Abstract

The invention relates to the technical field of vehicle braking, in particular to an electronic mechanical braking system. The invention provides an electronic mechanical braking system which comprises a power supply, a braking control assembly, a bridge control module and a plurality of wheel end modules, wherein the power supply is connected with the bridge control module, the braking control assembly is connected with the bridge control module and is used for sending a braking instruction to the bridge control module, and the bridge control module is electrically connected with the wheel end modules and is used for controlling a wheel end module braking clamp according to the received braking instruction so as to realize a plurality of braking modes. The invention provides an electromechanical braking system, which adopts electric signal transmission in the whole course from an instruction to an actuator, solves the problems of complexity and weight of the traditional electric pneumatic braking system and the problem of long braking response time, and realizes various braking modes such as service braking, parking braking, emergency braking, maintenance braking and the like.

Inventors

LUO XIAOFENG
Tang Changmin
XIAO LEI
FU JIANCHAO
PENG JING
YANG YONG
HUANG SONG
WANG HAO
LU JUN
CHENG XIANGHUI

Assignees

湖南中车智行科技有限公司

Dates

Publication Date: 20260512
Application Date: 20241112

Claims (15)

1. An electromechanical brake system is characterized by comprising a plurality of power supplies, a brake control assembly, a bridge control module and a plurality of wheel end modules: the power supplies are connected with the bridge control module; the brake control assembly is connected with the bridge control module and is used for sending a brake instruction to the bridge control module; The bridge control module is electrically connected with the wheel end module and used for controlling the wheel end module brake clamp to realize multiple brake modes according to the received brake command.
2. The electro-mechanical brake system of claim 1, wherein the bridge control module comprises a number of electronic control units, a number of DC/AC modules: the electric control units are used for receiving and sending braking instructions; the DC/AC modules are respectively and electrically connected with a plurality of power supplies; wherein each electric control unit is respectively and electrically connected with at least two DC/AC modules, and is used for receiving a braking instruction and transmitting the braking instruction to the corresponding DC/AC module The DC/AC module is electrically connected with the corresponding wheel end module and is used for converting the input direct current into alternating current and providing power for the wheel end module.
3. The electro-mechanical brake system of claim 2, wherein the number of electronic control units includes a first electronic control unit and a second electronic control unit, the number of power sources includes a second onboard power source and a third onboard power source, and the number of wheel end modules includes a first wheel end module and a second wheel end module; the plurality of DC/AC modules comprise a first DC/AC module, a second DC/AC module, a third DC/AC module and a fourth DC/AC module; The first DC/AC module is connected with the second vehicle-mounted power supply, the first electric control unit and the first wheel end module and is used for converting direct current into alternating current; the second DC/AC module is connected with a second vehicle-mounted power supply, the first electric control unit and the second wheel end module and is used for converting direct current into alternating current; The third DC/AC module is connected with a third vehicle-mounted power supply, the second electric control unit and the first wheel end module and is used for converting direct current into alternating current; The fourth DC/AC module is connected with the third vehicle-mounted power supply, the second electric control unit and the second wheel end module and is used for converting direct current into alternating current.
4. The electromechanical brake system according to claim 3, wherein the brake control assembly issues a brake command, and the first electronic control unit receives and controls the brake command to be transmitted to the first DC/AC module and/or the second DC/AC module, and drives the first wheel end module and/or the second wheel end module to implement braking; The second electronic control unit receives and controls the braking command to be transmitted to the third DC/AC module and/or the fourth DC/AC module, and drives the first wheel end module and/or the second wheel end module to realize braking.
5. The electro-mechanical brake system of claim 3, wherein the bridge control module further comprises a DC/DC boost module, the plurality of power sources further comprising a first onboard power source: the DC/DC boosting module is respectively and electrically connected with the first vehicle-mounted power supply, the first electric control unit, the first DC/AC module and the second DC/AC module; the DC/DC boosting module is used for boosting and converting the output voltage of the first vehicle-mounted power supply into the input voltage of the first DC/AC module and the second DC/AC module.
6. The electromechanical braking system of claim 1, wherein the braking commands issued by the braking control assembly include a service braking command, a park braking command, an emergency braking command, and a hold braking command; The plurality of braking modes includes a service braking mode, a parking braking mode, an emergency braking mode, and a holding braking mode.
7. The electro-mechanical brake system of claim 6, wherein the wheel end module includes a number of windings, a wheel end module motor, a wheel end module brake caliper, a wheel end module clutch: The windings generate electromagnetic force in the wheel end module motor and are used for providing electric energy; the wheel end module motor is used for converting or transmitting electric energy; the wheel end module brake clamp executes braking action; the wheel end module clutch is used for maintaining the power output by the motor.
8. The electro-mechanical brake system of claim 7, wherein the bridge control module drives a winding-controlled wheel end module motor according to the received service brake command, the wheel end module motor controlling a wheel end module brake caliper to apply or release a braking force; The service braking instruction is sent out by a braking control component or an automatic driving system.
9. The electro-mechanical brake system of claim 7, wherein the bridge control module drives a winding-controlled wheel end module motor that controls a wheel end module brake caliper to apply or release braking force in response to receiving the park brake command; The parking brake command is issued for a brake control assembly or an autopilot system.
10. The electromechanical brake system according to claim 7, further comprising an emergency relay having one end connected to the brake control assembly and the other end connected to the wheel end module; the emergency relay operates the wheel end module clutch according to the received emergency braking instruction, and the wheel end module clutch controls the wheel end module braking clamp to apply or release braking force; The emergency braking instruction is sent out by a braking control assembly or an automatic driving system.
11. The electro-mechanical brake system of claim 7, wherein the bridge control module receives the emergency braking command, drives a winding-controlled wheel end module motor, and the wheel end module motor controls a wheel end module brake caliper to apply or release braking force; The emergency braking instruction is sent out by a braking control component or an automatic driving system.
12. The electro-mechanical brake system of claim 7, wherein the bridge control module receives the hold brake command, drives a winding-controlled wheel end module motor, and the wheel end module motor controls a wheel end module brake caliper to apply or release a braking force; The hold brake command is issued for a brake control assembly or an autopilot system.
13. The electromechanical brake system according to claim 6, wherein the brake control assembly issues the service brake command via analog communication, issues the emergency brake command via digital communication, issues the park brake command via digital communication, and issues the hold brake command via digital communication.
14. The electro-mechanical brake system of claim 6, further comprising an emergency brake trainline, a first communication line, a second communication line, and an IO acquisition hard line; the bridge control module further comprises a first communication module, a second communication module, a first IO module and a second IO module: the first communication module is connected with the brake control assembly through a first communication line and is used for transmitting communication signals; the second communication module is connected with the brake control assembly through a second communication line and is used for transmitting communication signals; The communication signal comprises a service brake instruction and train information; The first IO module and the second IO module are respectively connected with the brake control assembly through IO collection hard wires and are used for inputting and outputting control signals, and the control signals comprise a parking brake instruction, an emergency brake instruction and a holding brake instruction; the emergency braking train line is connected with the wheel end module and used for emergency braking.
15. A vehicle comprising an electromechanical brake system according to any of claims 1-14.

Description

Electromechanical braking system Technical Field The invention relates to the technical field of vehicle braking, in particular to an electronic mechanical braking system. Background The increasing number of vehicles has led to frequent traffic safety problems, such that people pay more and more attention to the safety of vehicles. In order to enhance the active safety performance of vehicles, various countries have put into great study in this field, wherein the service braking technology plays a key role in improving the safety of vehicles. Conventional braking systems generally rely on pneumatic, hydraulic and mechanical hybrid braking, but these approaches have significant drawbacks, such as the potential for environmental contamination due to oil leakage from the hydraulic system, slow braking response, long braking distances, and low overall safety. In addition, the design and working principle of the conventional brake system have inherent disadvantages such as hysteresis in pressure build-up and release of the hydraulic system and insufficient control accuracy, which make it difficult to further optimize the braking effect. Moreover, conventional braking systems are difficult to meet the development requirements of the modern automotive industry, and development of novel braking systems which can be adapted to the intelligent driving and motorization trends is urgently needed. With advances in electronics and networking technology, electro-mechanical brake systems (EMB) are becoming a new type of brake technology of great interest. The electromechanical brake system adopts an electric actuator to replace a traditional hydraulic or pneumatic actuator, so that the system structure of the vehicle is simplified, the arrangement of the electromechanical brake system is more reasonable, and the weight and the energy consumption of the whole vehicle are reduced. The electronic mechanical braking system uses electric signals to carry out information transmission, the traditional braking pipeline and hydraulic or pneumatic media are omitted, and the response speed and control precision of the braking system are obviously improved, so that the braking distance is effectively shortened, and the safety of a vehicle is enhanced. In addition, the electronic control characteristic of the system enables the system to be integrated into an electronic network of a vehicle more easily, integrated with other safety control systems such as ABS (anti-lock braking system), ESP (electronic stability program) and the like, and compatible with functions such as an intelligent cockpit and the like. At the same time, the electric actuator reduces the environmental pollution caused by the traditional hydraulic and pneumatic systems, and therefore, the electromechanical brake system is considered to have great development potential. Currently, electric air brake systems are commonly employed in vehicles. Compared with an electromechanical braking system, the electro-pneumatic braking system has the advantages of relatively low cost and mature and stable technology. However, it also has some disadvantages such as longer response time, longer braking distance, low energy conversion efficiency, and more complicated structure, more noise, and inconvenience in maintenance. In contrast, although the electromechanical brake system is costly and technology is still under development, its significant advantages in terms of response speed, steering stability, energy efficiency, and environmental friendliness make it more competitive in future developments. Disclosure of Invention The invention aims to provide an electromechanical braking system of a vehicle, which solves the problems of complexity and weight of the traditional electronic control braking system and long braking response time, adopts double-path redundancy transmission in the whole process, and improves the safety of the system. The following presents a simplified summary of one or more aspects in order to provide a basic understanding of such aspects. This summary is not an extensive overview of all contemplated aspects, and is intended to neither identify key or critical elements of all aspects nor delineate the scope of any or all aspects. Its sole purpose is to present some concepts of one or more aspects in a simplified form as a prelude to the more detailed description that is presented later. In order to achieve the above object, the present invention provides an electromechanical brake system, The device comprises a plurality of power supplies, a brake control assembly, a bridge control module and a plurality of wheel end modules: the power supplies are connected with the bridge control module; the brake control assembly is connected with the bridge control module and is used for sending a brake instruction to the bridge control module; The bridge control module is electrically connected with the wheel end module and used for controlling the wheel end module brake c