CN-122009111-A - Braking system and vehicle

Abstract

The invention relates to the field of vehicles, and provides a braking system and a vehicle. The braking system comprises an electronic braking control unit, an axle control module, a braking actuating mechanism and a load sensing device. The braking system ensures the consistency of the speeds of wheels at two sides through the independent control of the low attaching side and the linkage adjustment of the high attaching side, solves the problem that the traditional braking system is easy to deviate and out of control, and improves the braking safety. The load signal that load induction system gathered provides accurate foundation for the braking force calculation, and each wheel braking force is adjusted according to this dynamic adjustment to electronic brake control unit, makes braking force and vehicle load accurate matching, avoids empty car braking too strong or full load braking not enough, has promoted braking uniformity and validity under the different operating modes. The comprehensive analysis of the wheel speed information and the load signal enables the braking force distribution to be more attached to the wheel attaching capability, makes full use of the ground attaching force on the premise of guaranteeing braking stability, shortens the braking distance, and is suitable for heavy-load and high-speed braking scenes of the multi-axle rubber-tyred vehicle.

Inventors

• WANG XIAODONG
• WANG XIANGBO
• WANG YOUJIE
• ZHANG LIMING
• WANG SHOUFENG

Assignees

• 中车青岛四方机车车辆股份有限公司

Dates

Publication Date

20260512

Application Date

20260316

Claims (11)

1. 1. A braking system, comprising: At least one electronic brake control unit; The axle control modules are in communication connection with the electronic brake control unit and correspond to a plurality of axles of the multi-axle rubber-tyred vehicle respectively; The brake actuating mechanism is arranged on each wheel and is connected with the axle control module of the corresponding axle; the load sensing device is used for collecting air spring pressure of each axle and sending the air spring pressure to the electronic brake control unit as a vehicle load signal; The electronic brake control unit is used for calculating target braking force according to the received braking instruction, the vehicle load signal and the wheel speed information and sending a braking control instruction to the axle control module; When detecting that the vehicle is on a split road surface with large difference of adhesion coefficients of left and right wheels, executing a corrected independent control strategy, wherein the corrected independent control strategy comprises the steps of adjusting braking force of wheels on the low adhesion side on the split road surface on the side with low adhesion coefficient according to an independent control principle, and establishing and adjusting braking pressure of wheels on the high adhesion side on the side with high adhesion coefficient according to a preset proportional relation or delay time according to the braking state of the wheels on the low adhesion side.
2. 2. The brake system of claim 1, wherein the brake system employs an asymmetric control architecture for a plurality of axles of the multi-axle rubber-tyred vehicle, the asymmetric control architecture comprising providing one or two axles at a head and one or two axles at a tail of the vehicle as a centralized control unit, respectively, and providing each of the remaining intermediate axles as a separate control unit.
3. 3. The brake system of claim 2, further comprising an electrically controlled master valve having an electrical signal control path and an air control signal control path, the electrical signal control path and the air control signal control path forming a dual redundancy.
4. 4. A brake system according to claim 1, comprising a dual brake control circuit having a bi-directional check valve provided therein to enable redundant control by means of the bi-directional check valve with the other circuit in the event of a failure of either circuit.
5. 5. The brake system of claim 1, further comprising a safety brake control circuit and an emergency brake control circuit, the safety brake control circuit and the emergency brake control circuit having redundant control functions.
6. 6. A brake system according to any one of claims 1 to 5, wherein the load sensing means is a pressure sensor provided on a vehicle running system air spring; The electronic brake control unit is configured to replace the load signal of an adjacent axle when the load signal of one axle fails, and to calculate the load signal under a preset heavy load condition when the load signals of all the axles of the vehicle fail.
7. 7. The brake system of any one of claims 1 to 5, wherein the electronic brake control unit communicates with the axle control module via a CAN bus or ethernet to transmit the brake control commands and diagnostic data.
8. 8. The brake system according to any one of claims 1 to 5, wherein the axle control module is a single-channel module that controls an air charge-discharge pressure regulating valve to output a target brake pressure to the brake actuator upon receiving an instruction from the electronic brake control unit.
9. 9. Brake system according to any of claims 1-5, characterized in that the brake system further comprises a maintenance terminal arranged on board the vehicle, which is connected to the electronic brake control unit and/or to the axle control module via ethernet for program updating, online debugging and data downloading of the brake system.
10. 10. A brake system according to any one of claims 1 to 5, wherein the brake actuator comprises a brake chamber; the brake system further includes a pressure sensor provided at each wheel for detecting a brake cylinder pressure in the brake air chamber and feeding back the detected pressure value to the electronic brake control unit.
11. 11. A vehicle comprising a brake system according to any one of claims 1 to 10.

Description

Braking system and vehicle Technical Field The invention relates to the field of vehicles, and provides a braking system and a vehicle. Background In the current commercial vehicle field, two-stage double-pipe pneumatic control brake systems are commonly adopted in air brake systems and rubber-tyred vehicles. In short, the main function of such a braking system is to control the braking of the wheels by means of the air coming from two sets of air ducts, each set of system being responsible for one axle, thus guaranteeing the stability and safety of the vehicle. Although effective, this design has certain limitations in practical applications. Due to the complex piping and the large number of control units, the system has numerous points of failure, which becomes difficult and time consuming to maintain and repair, which undoubtedly increases the burden on the vehicle owners and operators. Therefore, simplifying the air path principle, reselecting the equipment and optimizing the functional design to solve the practical problems becomes the consistent pursuit of the industry. Conventional braking systems are not only complex in wiring, but also have many limitations in construction and function. As described above, although the two-stage double-pipe pneumatic brake system can meet basic braking requirements, the equipment pipeline is complex, so that the fault point is increased, and the maintenance work is complex. To cope with these problems, many manufacturers have attempted to make small improvements by reducing the diameter of the gas path or improving the reliability of the equipment, but the effectiveness of these measures is limited and the problem is not fundamentally solved. Disclosure of Invention The embodiment of the invention provides a braking system which is used for solving the defects of complex pipelines, multiple fault points and difficult maintenance of the braking system in the related technology. The embodiment of the invention also provides a vehicle. An embodiment of a first aspect of the present invention provides a brake system comprising: At least one electronic brake control unit; The axle control modules are in communication connection with the electronic brake control unit and correspond to a plurality of axles of the multi-axle rubber-tyred vehicle respectively; The brake actuating mechanism is arranged on each wheel and is connected with the axle control module of the corresponding axle; the load sensing device is used for collecting air spring pressure of each axle and sending the air spring pressure to the electronic brake control unit as a vehicle load signal; The electronic brake control unit is used for calculating target braking force according to the received braking instruction, the vehicle load signal and the wheel speed information and sending a braking control instruction to the axle control module; When detecting that the vehicle is on a split road surface with large difference of adhesion coefficients of left and right wheels, executing a corrected independent control strategy, wherein the corrected independent control strategy comprises the steps of adjusting braking force of wheels on the low adhesion side on the split road surface on the side with low adhesion coefficient according to an independent control principle, and establishing and adjusting braking pressure of wheels on the high adhesion side on the side with high adhesion coefficient according to a preset proportional relation or delay time according to the braking state of the wheels on the low adhesion side. According to one embodiment of the invention, the braking system adopts an asymmetric control framework for a plurality of axles of the multi-axle rubber-tyred vehicle, wherein the asymmetric control framework comprises the steps that one or two axles at the front part and one or two axles at the tail part of the vehicle are respectively arranged as centralized control units, and the rest middle axles are respectively arranged as independent control units. According to one embodiment of the present invention, the brake system further includes an electric brake master valve having an electric signal control passage and an air control signal control passage, the electric signal control passage and the air control signal control passage constituting a dual redundancy. According to one embodiment of the invention, the brake system comprises a dual brake control circuit having a bi-directional check valve disposed therein to enable redundant control with one circuit by means of the other circuit in the event of a failure of either circuit. According to one embodiment of the invention, the brake system further comprises a safety brake control circuit and an emergency brake control circuit, the safety brake control circuit and the emergency brake control circuit having redundant control functions. According to one embodiment of the invention, the load sensing device is a pressure sensor arranged on an