Hydraulic brake system and vehicle

Abstract

The application belongs to the technical field of vehicle braking, and provides a hydraulic braking system and a vehicle. The hydraulic braking system comprises a pipeline device, at least two actuators, at least two first valve bodies and a controller. The pipeline device comprises at least two branch pipelines, and the at least two branch pipelines are connected with the at least two actuators. The at least two actuators are arranged on the branch pipelines one by one, and are used for controlling the on-off of the corresponding branch pipelines. The controller is electrically connected with the at least two first valve bodies and the at least two actuators. The controller is configured to, in response to detecting that the pressure value of any actuator drops below a pressure threshold value, control the at least two first valve bodies to be closed one by one; and identify the branch pipeline in which leakage occurs according to the change of the pressure value of the remaining actuators after one of the first valve bodies is closed. The application can timely determine the specific position of the leakage when the hydraulic braking system leaks.

Description

Technical Field

[0001] This application relates to the field of vehicle braking technology, and more particularly to a hydraulic braking system and a vehicle. Background Technology

[0002] Hydraulic braking systems are widely used in vehicle braking control due to their rapid response characteristics, high braking force output capability, and good energy recovery potential.

[0003] A hydraulic braking system includes a reservoir, piping, and brake actuators. Liquid in the reservoir flows to the brake actuators through the piping. Specifically, the liquid in the reservoir flows under pressure and transmits that pressure to the brake actuators, which apply pressure to the vehicle's wheels to apply brakes. If a leak occurs in the piping, liquid will continuously leak out, resulting in insufficient braking force on the vehicle's wheels. In related technologies, sensors can be installed in the reservoir of the hydraulic braking system to detect changes in the total amount of liquid or pressure, thereby determining whether a leak has occurred. However, it is difficult to pinpoint the exact location of a leak in a hydraulic braking system when one is leaking.

[0004] Therefore, there is an urgent need for a hydraulic braking system that can accurately locate the leak point when a leak occurs. Utility Model Content

[0005] This application provides a hydraulic braking system and vehicle that can promptly identify the specific location of the leak when the hydraulic braking system leaks fluid.

[0006] This application provides a hydraulic braking system, including a piping assembly, at least two actuators, at least two first valve bodies, and a controller. The piping assembly includes at least two branch lines, each connected to one of the at least two actuators. The at least two actuators are correspondingly disposed on the branch lines for controlling the on / off state of the corresponding branch lines. The controller is electrically connected to the at least two first valve bodies and the at least two actuators. The controller is configured to, in response to detecting a pressure drop in any actuator below a pressure threshold, control the at least two first valve bodies to close sequentially; and to identify the branch line where a leak has occurred based on the pressure change of the remaining actuators after closing one of the first valve bodies.

[0007] In one possible implementation, the hydraulic braking system provided in this application determines that a leak has occurred in the branch pipeline corresponding to the closed first valve body if the pressure value of the remaining actuators recovers to equal to or higher than the pressure threshold after a first valve body is closed.

[0008] In one possible implementation, the hydraulic braking system provided in this application includes a controller that controls the first valve body corresponding to the leaking branch line to remain in a continuously closed state.

[0009] In one possible implementation, the hydraulic braking system provided in this application has a pipeline comprising a rigid section and a flexible section, with a first valve body located in the rigid section.

[0010] In one possible implementation, the hydraulic braking system provided in this application has a first valve body that is a normally open solenoid valve.

[0011] In one possible implementation, the hydraulic braking system provided in this application further includes a pressure sensor, which is disposed on the actuator and electrically connected to the controller. The pressure sensor is used to detect the pressure value of the actuator, and the controller is used to acquire the pressure value.

[0012] In one possible implementation, the hydraulic braking system provided in this application has at least two pipeline devices, each pipeline device including a main pipeline, each main pipeline connecting at least two branch pipelines, and each branch pipeline having an actuator and a first valve body; the hydraulic braking system also includes at least two second valve bodies, which are respectively disposed on the main pipeline for controlling the on / off state of the corresponding main pipeline, and the second valve bodies are electrically connected to the controller.

[0013] In one possible implementation, the hydraulic braking system provided in this application has a controller configured to control at least two second valve bodies to close sequentially in response to detecting that the pressure value of any actuator has dropped below a pressure threshold; and to identify a leaking pipeline device based on the pressure value change of the actuator corresponding to the remaining second valve bodies after closing one of the second valve bodies.

[0014] In one possible implementation, the hydraulic braking system provided in this application includes a controller configured to open a second valve body in a leaking pipeline device and control the first valve bodies in the leaking pipeline device to close one by one; and to identify the leaking branch pipeline based on the pressure value change of the remaining actuators after one of the first valve bodies is closed.

[0015] This application also provides a vehicle, including a vehicle body, wheels, and the aforementioned hydraulic braking system, wherein the hydraulic braking system is disposed in the vehicle body, and the actuator is used to brake the wheels.

[0016] The hydraulic braking system provided in this application controls the opening and closing of corresponding branch pipelines by setting a first valve body on each branch pipeline, and both the first valve body and the actuator are electrically connected to the controller. The controller can detect the pressure value on each actuator in real time and compare the pressure value with a pressure threshold. Based on the relationship between the pressure value and the pressure threshold, it can be determined whether the hydraulic braking system is leaking. When a leak occurs in the hydraulic braking system, by closing the first valve body on each branch pipeline one by one, and by observing the pressure changes of the actuators corresponding to other branch pipelines, it can be determined whether the branch pipeline corresponding to the closed first valve body affects the pressure of multiple actuators, thus identifying the leaking branch pipeline. This allows for timely determination of the specific location of the leak in the hydraulic braking system, facilitating maintenance of the hydraulic braking system. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of the hydraulic braking system provided in the embodiments of this application;

[0019] Figure 2 This is a schematic diagram of the braking process of a hydraulic braking system provided in an embodiment of this application;

[0020] Figure 3 This is a schematic diagram of the structure of the branch pipelines in the hydraulic braking system provided in the embodiments of this application;

[0021] Figure 4 This is another structural schematic diagram of the hydraulic braking system provided in an embodiment of this application.

[0022] Explanation of reference numerals in the attached figures:

[0023] 10-Hydraulic braking system;

[0024] 100 - Piping device; 100a - First piping device; 100b - Second piping device;

[0025] 110 - Branch pipe; 110a - First branch pipe; 110b - Second branch pipe;

[0026] 120 - Main pipeline; 120a - First main pipeline; 120b - Second main pipeline;

[0027] 111 - Rigid section; 112 - Flexible section;

[0028] 200 - Execution Item;

[0029] 300 - First valve body;

[0030] 400-Controller;

[0031] 500-Liquid supply unit; 510-Liquid storage tank; 520-Liquid supply control unit; 530-Pump body; 540-Motor; 550-Accumulator; 560-Check valve;

[0032] 600 - Pressure sensor;

[0033] 700 - Second valve body. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0035] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, an indirect connection through an intermediate medium, or the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0036] In the description of this application, it should be understood that the terms "upper", "lower", "front", "back", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0037] The terms "first," "second," and "third" (if any) in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a particular order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented, for example, in orders other than those illustrated or described herein.

[0038] Furthermore, the terms “comprising” and “having”, and any variations thereof, are intended to cover non-exclusive inclusion, such as a process, method, system, product, or maintenance tool that includes a series of steps or units, not necessarily limited to those steps or units that are explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to such process, method, product, or maintenance tool.

[0039] Hydraulic braking systems are widely used in vehicle braking control due to their rapid response characteristics, high braking force output capability, and good energy recovery potential.

[0040] A hydraulic braking system includes a reservoir, piping, and brake actuators. Liquid in the reservoir flows through the piping to the brake actuators. Specifically, the liquid in the reservoir flows under pressure and transmits that pressure to the brake actuators. The brake actuators apply pressure to the vehicle's wheels, reducing or stopping their rotation to brake the vehicle.

[0041] If a leak occurs in the pipeline, liquid will continuously leak from the leak point, causing the pressure on the wheels to be less than the liquid output from the reservoir, resulting in insufficient braking force on the vehicle's wheels.

[0042] In related technologies, sensors can be installed in the fluid reservoir of a hydraulic braking system. These sensors can be level sensors and pressure sensors. The level sensor detects the total volume of fluid, while the pressure sensor detects changes in fluid pressure. The presence of a leak is determined based on either the total volume or the pressure change. However, relying solely on the total volume and pressure changes is insufficient to pinpoint the exact location of a leak in a timely manner. Failure to promptly identify the leak location can compromise the safe operation of the vehicle.

[0043] Based on this, embodiments of this application provide a hydraulic braking system and a vehicle, which can promptly determine the specific location of the leak when the hydraulic braking system leaks fluid.

[0044] The vehicle can be a car or a rail vehicle, and the rail vehicle can be a subway, light rail, high-speed train, etc.

[0045] The vehicle includes a body, wheels, and a hydraulic braking system. The hydraulic braking system is located in the body and is used to brake the wheels.

[0046] The vehicle body consists of the vehicle's frame and the doors mounted on it, while the wheels are installed beneath the vehicle body. A hydraulic braking system can be mounted on the vehicle body and used to apply resistance to the wheels to brake them.

[0047] Figure 1 This is a schematic diagram of the hydraulic braking system provided in an embodiment of this application. Wherein, Figure 1In the hydraulic braking system 10, the pipelines connecting the various components are represented by solid lines, and the electrical connections between the components are represented by dashed lines.

[0048] See Figure 1 As shown, the hydraulic braking system 10 includes a piping assembly 100, at least two actuators 200, at least two first valve bodies 300, and a controller 400. The piping assembly 100 includes at least two branch lines 110 connected to at least two actuators 200. At least two first valve bodies 300 are correspondingly disposed on each branch line 110, and each first valve body 300 controls the opening and closing of the corresponding branch line 110. The controller 400 is electrically connected to the at least two first valve bodies 300 and the at least two actuators 200. The controller 400 is configured to, in response to detecting that the pressure value P2 of any actuator 200 drops below a pressure threshold P1, control at least two first valve bodies 300 to close sequentially; and to identify the branch line 110 where a leak has occurred based on the change in pressure value P2 of the remaining actuators 200 after closing one of the first valve bodies 300.

[0049] The hydraulic braking system 10 also includes a fluid supply unit 500, which includes a fluid reservoir 510, a fluid supply control component 520, a pump body 530, and a motor 540. The shaft of the motor 540 is connected to the pump body 530, and the pump body 530 can be connected to the fluid reservoir 510. The fluid supply control component 520 is electrically connected to the controller 400 and also electrically connected to the motor 540. The fluid reservoir 510 is connected to the pump body 530, and the pump body 530 can be connected to the piping system 100.

[0050] When the vehicle needs to brake, the controller 400 sends the braking request to the fluid supply control unit 520 in the fluid supply unit 500. The fluid supply control unit 520 controls the motor 540 to run, and the motor 540 drives the pump body 530 to rotate. As a result, the liquid in the reservoir 510 can be pumped to the pipeline device 100, and the liquid flows through the pipeline device 100 to the actuator 200.

[0051] In one possible implementation, the liquid supply unit 500 further includes an accumulator 550 located between the pump body 530 and the actuator 200. When the pump body 530 rotates, it can pump liquid from the storage tank 510 to the accumulator 550 to build pressure in the accumulator 550. A one-way valve 560 can also be installed on the pipeline between the accumulator 550 and the pump body 530, and the one-way valve 560 is electrically connected to the liquid supply control unit 520. When building pressure in the accumulator 550, the liquid supply control unit 520 controls the one-way valve 560 to open. After building pressure in the accumulator 550 is complete, the liquid supply control unit 520 controls the one-way valve 560 to close. When the vehicle brakes, liquid can enter the pipeline device 100 from the accumulator 550.

[0052] Piping assembly 100 refers to the collection of pipes used for transmitting fluid in the hydraulic braking system 10, including a combination of rigid pipes and flexible hoses. Piping assembly 100 may include two or more branch lines 110; for example, piping assembly 100 may include three or four branch lines 110. Figure 1 The diagram schematically shows two branch lines 110.

[0053] There can be two or more actuators 200, for example, three or four actuators 200. The number of actuators 200 is the same as the number of branch pipes 110. Each actuator 200 is connected to a branch pipe 110 in a one-to-one correspondence. The liquid in the accumulator 550 flows to different actuators 200 through the branch pipes 110 in the piping device 100.

[0054] There can be two or more first valve bodies 300, for example, three or four. The number of first valve bodies 300 is the same as the number of branch pipes 110. Each first valve body 300 is installed on a branch pipe 110 in a one-to-one correspondence, and is located between the accumulator 550 and the actuator 200. When a first valve body 300 is open, the branch pipe 110 is in a conductive state. When a first valve body 300 is closed, the branch pipe 110 is in a disconnected state.

[0055] The actuator 200 can be a clamp. The actuator 200 contacts the wheel of the vehicle and brakes the wheel of the vehicle through the friction between the actuator 200 and the wheel of the vehicle.

[0056] Both the actuator 200 and the first valve body 300 are electrically connected to the controller 400. For example, the actuator 200 and the first valve body 300 can be electrically connected to the controller 400 via cables, or they can be wirelessly connected to the controller 400.

[0057] The first valve body 300 can be a normally open solenoid valve, which allows the controller 400 to easily control the opening and closing of the first valve body 300. During normal operation of the hydraulic braking system 10, the first valve body 300 is in the open state, and the branch line 110 is in the conductive state.

[0058] In one possible implementation, a strain gauge can be provided on the actuator 200, and the strain gauge is electrically connected to the controller 400. The strain gauge can convert the deformation of the actuator 200 into an electrical signal and transmit it to the controller 400.

[0059] In another possible implementation, the hydraulic braking system 10 further includes a pressure sensor 600, which is disposed on the actuator 200 and electrically connected to the controller 400. The pressure sensor 600 is used to detect the pressure value of the actuator 200, and the controller 400 is used to acquire the pressure value.

[0060] Compared with strain gauges, pressure sensor 600 has advantages such as simple installation, accurate measurement, and stable performance. By setting pressure sensor 600 to detect the pressure value of actuator 200, changes in liquid pressure can be accurately captured and fed back to controller 400 for monitoring.

[0061] The controller 400 is equipped with a preset pressure threshold P1, which can be a range of values. Since the controller 400 is electrically connected to each actuator 200, it can acquire the real-time pressure value P2 of each actuator 200 and compare it with the pressure threshold P1. When the real-time pressure value P2 of the actuator 200 is within the range of the pressure threshold P1, the controller 400 can determine that no leakage has occurred in the hydraulic braking system 10. Therefore, the real-time pressure value P2 of the actuator 200 can be detected.

[0062] When the pressure value P2 of some actuators 200 is lower than the pressure threshold P1, the controller 400 can determine that a leak has occurred in the hydraulic braking system 10 and can quickly identify the specific location of the leak.

[0063] Specifically, the controller 400 can control multiple first valve bodies 300 to close one by one. When the controller 400 closes one of the first valve bodies 300 on the branch line 110, if the pressure value P2 on the actuator 200 corresponding to the other branch lines 110 changes, it can be determined that the closed branch line 110 affects the pressure value P2 of the multiple actuators 200 in the hydraulic braking system 10, and it can be determined that the leakage occurs on the branch line 110 corresponding to the closed first valve body 300. When the controller 400 closes the first valve body 300 on one of the branch pipes 110, if the pressure value P2 on the actuators 200 corresponding to the other branch pipes 110 does not change, it can be determined that the closed branch pipe 110 has no effect on the pressure value P2 of the multiple actuators 200 in the hydraulic braking system 10. Therefore, it can be determined that the leakage did not occur on the branch pipe 110 corresponding to the closed first valve body 300. The controller 400 judges the first valve body 300 on each of the multiple branch pipes 110 one by one, and can then determine the branch pipe 110 where leakage occurred.

[0064] The hydraulic braking system 10 provided in this application embodiment controls the opening and closing of each branch pipe 110 by setting a first valve body 300 on each branch pipe 110, and both the first valve body 300 and the actuator 200 are electrically connected to the controller 400. The controller 400 can detect the pressure value P2 on each actuator 200 in real time, and compare the pressure value P2 with the pressure threshold P1. Based on the relationship between the pressure value P2 and the pressure threshold P1, it can be determined whether the hydraulic braking system 10 is leaking. When the hydraulic braking system 10 leaks, by closing the first valve body 300 on each branch pipe 110 one by one, the pressure change of the actuator 200 corresponding to other branch pipes 110 can be used to determine whether the branch pipe 110 corresponding to the closed first valve body 300 affects the pressure of multiple actuators 200, thereby identifying the leaking branch pipe 110. This allows for timely determination of the specific location of the leak in the hydraulic braking system 10, facilitating maintenance of the hydraulic braking system 10.

[0065] In one possible implementation, if after closing a first valve body 300, the pressure value P2 of the remaining actuators 200 recovers to equal or higher than the pressure threshold P1, the controller 400 determines that a leak has occurred in the branch line 110 corresponding to the closed first valve body 300.

[0066] Taking the piping system 100, which includes two branch pipes 110, as an example, the two branch pipes 110a and 110b are respectively the first branch pipe 110a and the second branch pipe 110b. For example, the controller 400 controls the first valve body 300 on the first branch pipe 110a to close, thereby disconnecting the first branch pipe 110a. The controller 400 monitors the pressure value P2 of the actuator 200 connected to the second branch pipe 110b for a period of time (for example, for 5 seconds). When the pressure value P2 of the actuator 200 connected to the second branch pipe 110b gradually increases to be equal to or higher than the pressure threshold P1, it indicates that the leakage has stopped, and the location of the leakage is on the first branch pipe 110a.

[0067] When the pressure of the actuator 200 connected to the second branch line 110b is still less than the pressure threshold P1, it indicates that the leakage is still ongoing and the leakage location is not on the first branch line 110a. The controller 400 controls the first valve body 300 on the first branch line 110a to open and controls the first valve body 300 on the second branch line 110a to close. When the pressure value P2 of the actuator 200 connected to the first branch line 110a gradually increases to be equal to or higher than the pressure threshold P1, it indicates that the leakage has stopped and the leakage location is on the second branch line 110b. The method by which the controller 400 identifies the specific location of the leakage is relatively simple. Therefore, the circuits connecting the actuator 200 and the controller 400 and the circuits connecting the first valve body 300 and the controller 400 are relatively simple, making the structure of the hydraulic braking system 10 relatively simple as well.

[0068] In one possible implementation, the controller 400 is used to control the first valve body 300 corresponding to the leaking branch pipe 110 to be in a continuously closed state.

[0069] For example, when the controller 400 detects a leak in the first branch pipe 110a, the controller 400 can control the first valve body 300 corresponding to the first branch pipe 110a to remain in a continuously closed state. The continuously closed state means that after detecting a leak in the first branch pipe 110a, the controller 400 continuously sends a closing signal to the first valve body 300 corresponding to the first branch pipe 110a to prevent it from reopening. The closed state of the first valve body 300 corresponding to the first branch pipe 110a continues until the vehicle stops for maintenance.

[0070] This prevents continuous liquid leakage, and the actuators 200 corresponding to the other branch lines 110 in the hydraulic braking system 10 can provide normal braking to the vehicle's wheels, allowing the vehicle to continue moving for a period of time even after some branch lines 110 in the hydraulic braking system 10 leak, thus avoiding the vehicle from stopping immediately due to leakage.

[0071] The braking process of the hydraulic braking system 10 will now be described.

[0072] Figure 2 This is a schematic diagram of the braking process of a hydraulic braking system provided in an embodiment of this application.

[0073] See Figure 2 As shown, the braking process of a hydraulic braking system includes:

[0074] S101, Liquid supply control unit 520 controls motor 540 to start and controls check valve 560 to open;

[0075] S102, Brake fluid enters the accumulator 550 and enters each actuator 200 through the pipeline device 100 to brake the vehicle's wheels.

[0076] S103, The controller 400 acquires the pressure value P2 of the actuator 200 and compares it with the pressure threshold P1;

[0077] S104. When the pressure value P2 of the actuator 200 is lower than the pressure threshold P1, control the first valve body 300 to close one by one.

[0078] S105. If, after closing a first valve body 300, the pressure value P2 of the remaining actuators 200 recovers to be equal to or higher than the pressure threshold P1, the controller 400 determines that a leak has occurred in the branch pipeline 110 corresponding to the closed first valve body 300.

[0079] S106, the controller 400 controls the first valve body 300 corresponding to the leaking branch pipe 110 to be in a continuously closed state.

[0080] Figure 3 This is a schematic diagram of the branch pipeline structure of the hydraulic braking system provided in the embodiments of this application.

[0081] See Figure 3 As shown, the branch pipeline 110 includes a rigid section 111 and a flexible section 112, and the first valve body 300 is located in the rigid section 111.

[0082] Branch pipe 110 may include multiple rigid sections 111 and multiple flexible sections 112, Figure 3 The diagram schematically illustrates a rigid section 111 and a flexible section 112. The rigid section 111 can be connected to the vehicle body. The rigid section 111 can be made of a hard material (such as metal or hard plastic), which is not easily deformed or fatigued. The flexible section 112 can be made of an elastic material (such as rubber). When the vehicle is turning, the branch line 110 will bend, and the flexible section 112 can bend adaptively with the vehicle's turning, thereby preventing the branch line 110 from affecting the vehicle's turning. The first valve body 300 is located on the rigid section 111, which allows the branch line 110 to be reliably fixed to the first valve body 300, and also prevents the first valve body 300 from applying pressure to the flexible section 112, increasing the possibility of the flexible section 112 breaking.

[0083] Figure 4 This is another structural schematic diagram of the hydraulic braking system provided in an embodiment of this application.

[0084] See Figure 4As shown, there are at least two pipeline devices 100. Each pipeline device 100 includes a main pipeline 120. Each main pipeline 120 is connected to at least two branch pipelines 110. Each branch pipeline 110 is provided with an actuator 200 and a first valve body 300. The hydraulic braking system 10 also includes at least two second valve bodies 700. The at least two second valve bodies 700 are respectively arranged on the main pipeline 120 to control the on / off of the corresponding main pipeline 120. The second valve bodies 700 are electrically connected to the controller 400.

[0085] The vehicle can be a rail vehicle, and the number of piping devices 100 can be the same as the number of rail vehicle cars or the number of rail vehicle bogies. Figure 4 Two piping devices 100 are schematically shown, namely a first piping device 100a and a second piping device 100b.

[0086] Each piping device 100 includes a main pipe 120 and multiple branch pipes 110. For example, a first piping device 100a includes a first main pipe 120a, which is connected to a first branch pipe 110a and a second branch pipe 110b. A second piping device 100b includes a second main pipe 120b, which is also connected to the first branch pipe 110a and the second branch pipe 110b.

[0087] A second valve body 700 is provided on both the first main pipeline 120a and the second main pipeline 120b, and both second valve bodies 700 are electrically connected to the controller 400. The second valve body 700 can also be a normally open solenoid valve.

[0088] When multiple branch lines 110 of one of the piping systems 100 leak oil simultaneously, the controller 400 can control the second valve body 700 on the main line 120 to close. By setting up the main line 120 and the second valve body 700, the isolation efficiency is further improved, thereby increasing the efficiency of the hydraulic braking system 10 in locating the leak.

[0089] In one possible implementation, the controller 400 is configured to control at least two second valve bodies 700 to close sequentially in response to detecting that the pressure value of any actuator 200 drops below a pressure threshold; and to identify a leaking pipeline device 100 based on the pressure value change of the actuator 200 corresponding to the other second valve bodies 700 after closing one of the second valve bodies 700.

[0090] For example, if after closing the second valve body 700 located on the first main line 120a, the pressure value of the actuator 200 corresponding to the second main line 120b returns to equal to or higher than the pressure threshold, the controller 400 determines that there is a leak in the first main line 120a or part of the first branch line 110a in the closed first pipeline device 100. The leak location can be located in the first pipeline device 100a without having to check other pipeline devices 100, which can further improve the efficiency of the hydraulic braking system 10 in locating the leak.

[0091] In one possible implementation, the controller 400 is configured to open the second valve body 700 in the leaking piping device 100 and control the first valve bodies 300 in the leaking piping device 100 to close one by one; and to identify the leaking branch pipe 110 based on the pressure value change of the remaining actuators 200 after one of the first valve bodies 300 is closed.

[0092] In other words, when the leaking pipeline device 100 is determined to be the first pipeline device 100a, the second valve body 700 in the first pipeline device 100a can be reopened. Then, the branch pipelines 110 in the first pipeline device 100a can be inspected one by one using the method described above for inspecting branch pipelines 110. By simply adding a second valve body 700 and controlling the opening and closing sequence of the first valve body 300 and the second valve body 700 via the controller 400, the leak location can be quickly located, further improving the efficiency of the hydraulic braking system 10 in locating leaks.

[0093] Understandably, once the leaking branch line 110 is identified, the controller 400 needs to keep the first valve body 300 on the leaking branch line 110 in a continuously closed state.

[0094] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A hydraulic braking system, characterized in that, include: Piping device (100), including at least two branch pipes (110); At least two actuators (200) and at least two branch lines (110) are connected to at least two of the actuators (200); At least two first valve bodies (300) are respectively installed on the branch pipe (110) to control the opening and closing of the corresponding branch pipe (110); The controller (400) is electrically connected to at least two of the first valve bodies (300) and at least two actuators (200); The controller (400) is configured to control the at least two first valve bodies (300) to close one by one in response to detecting that the pressure value of any of the actuators (200) drops below a pressure threshold; and to identify the leaking branch line (110) based on the pressure value change of the remaining actuators (200) after closing one of the first valve bodies (300).

2. The hydraulic braking system according to claim 1, characterized in that, If, after closing one of the first valve bodies (300), the pressure values ​​of the remaining actuators (200) recover to be equal to or higher than the pressure threshold, then the controller (400) determines that a leak has occurred in the branch pipeline (110) corresponding to the closed first valve body (300).

3. The hydraulic braking system according to claim 2, characterized in that, The controller (400) is used to control the first valve body (300) corresponding to the leaking branch pipe (110) to be in a continuously closed state.

4. The hydraulic braking system according to claim 1, characterized in that, The branch pipeline (110) includes a rigid section (111) and a flexible section (112), and the first valve body (300) is located in the rigid section (111).

5. The hydraulic braking system according to claim 1, characterized in that, The first valve body (300) is a normally open solenoid valve.

6. The hydraulic braking system according to claim 1, characterized in that, It also includes a pressure sensor (600), which is disposed on the actuator (200) and electrically connected to the controller (400). The pressure sensor (600) is used to detect the pressure value of the actuator (200), and the controller (400) is used to acquire the pressure value.

7. The hydraulic braking system according to any one of claims 1 to 6, characterized in that, There are at least two pipeline devices (100), each pipeline device (100) includes a main pipeline (120), each main pipeline (120) is connected to at least two branch pipelines (110), and each branch pipeline (110) is provided with the actuator (200) and the first valve body (300). The hydraulic braking system (10) further includes at least two second valve bodies (700), which are respectively disposed on the main pipeline (120) for controlling the opening and closing of the corresponding main pipeline (120). The second valve bodies (700) are electrically connected to the controller (400).

8. The hydraulic braking system according to claim 7, characterized in that, The controller (400) is configured to control the at least two second valve bodies (700) to close one by one in response to detecting that the pressure value of any of the actuators (200) drops below a pressure threshold; and to identify the pipeline device (100) that has leaked based on the change in pressure value of the actuators (200) corresponding to the remaining second valve bodies (700) after one of the second valve bodies (700) is closed.

9. The hydraulic braking system according to claim 8, characterized in that, The controller (400) is configured to open the second valve (700) in the leaking piping device (100) and control the first valve (300) in the leaking piping device (100) to close one by one; and to identify the leaking branch pipe (110) based on the pressure value change of the remaining actuators (200) after one of the first valves (300) is closed.

10. A vehicle, characterized in that, The vehicle includes a vehicle body, wheels, and a hydraulic braking system (10) as described in any one of claims 1 to 9, the hydraulic braking system (10) being disposed on the vehicle body, and the actuator (200) being used to brake the wheels.

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