Brake system testing device, method and equipment

Abstract

The invention provides a brake system testing device, method and equipment, relates to the technical field of testing, and is used for realizing continuous automatic testing of brake pipeline failure. The braking system comprises a liquid storage device and a first braking pipeline, the device comprises a controller, a first control valve and a first pressure sensor, one end of the first control valve is used for being connected with the first braking pipeline, and the other end of the first control valve is used for being connected with the liquid storage device; the first control valve is used for connecting or disconnecting the first brake pipeline and the liquid storage device; the first pressure sensor is used for measuring first pressure information of the first brake pipeline; the controller is used for controlling the first control valve to be switched on or switched off and obtaining the first pressure information.

Description

Braking system testing device, method and equipment Technical Field

[0001] The present application relates to the field of testing technology, and in particular to a braking system testing device, method and equipment. Background Art

[0002] With the widespread application of intelligent driving systems, advanced driver assistance systems, and active safety systems, the safety and comfort of vehicle drivers and passengers are better guaranteed. At the same time, the functional, performance, and safety requirements for vehicle braking systems, such as electronic stability controllers (ESC) and autonomous emergency braking systems (AEB), are also increasing. Consequently, the requirements for the efficiency, accuracy, and automation of vehicle braking system testing and verification are also gradually increasing.

[0003] Summary of the Invention

[0004] The present application provides a brake system testing device, method and equipment for realizing continuous automated testing of brake line failures.

[0005] To achieve the above objectives, this application adopts the following technical solutions:

[0006] In a first aspect, a braking system testing device is provided, which includes a reservoir and a first brake line. The device includes a controller, a valve assembly and a first pressure sensor. The valve assembly includes at least one branch control valve, one end of a first control valve in the at least one branch control valve is used to connect to the first brake line, and the other end of the first control valve is used to connect to the reservoir; wherein the first control valve is used to connect or disconnect the first brake line and the reservoir; the first pressure sensor is used to measure first pressure information of the first brake line; the controller is used to control the connection or disconnection of the first control valve and obtain first pressure information, and the first pressure information is used to determine failure of the first brake line.

[0007] In the above technical solution, one end of the first control valve is connected to the first brake line, and the other end of the first control valve is connected to the reservoir. In this way, when the first brake line is tested for failure, the first control valve is controlled by the controller to be turned on, so that the brake fluid flowing into the first brake line can pass through the first control valve and then flow back to the reservoir, realizing the recycling of the brake fluid, so that the device can realize multiple continuous tests of the brake lines in the brake system.

[0008] In a possible implementation of the first aspect, the valve assembly further includes a main circuit control valve, the main circuit control valve being used to connect the at least one branch circuit control valve to the reservoir; the main circuit control valve being used to connect the at least one branch circuit control valve to the reservoir when a control valve in the at least one branch circuit control valve is turned on; and the controller being used to control the turning on or off of the main circuit control valve. In the above possible implementation, by connecting the main circuit control valve between the at least one branch circuit control valve and the reservoir, the safety during the braking system test can be improved. This is because during the braking system test, there is a certain risk in isolating or isolating the pressure in the brake line from the atmospheric pressure in the reservoir by only using one branch circuit control valve, and the branch circuit control valve can easily be damaged by the pressure on both sides.

[0009] In a possible implementation of the first aspect, the device further includes: a switch; the switch is used to turn off the main control valve. The switch can be manually controlled or automatically controlled. Optionally, the switch is connected between the controller and the main control valve; the controller is also used to supply power to the main control valve; the switch is also used to turn off the power supply to the main control valve. In the above possible implementation, when an emergency occurs during the braking system test, the main control valve can be turned off by the switch to quickly restore the vehicle's braking system and ensure the safety of vehicle driving. Furthermore, when the switch is used to cut off the power supply to the main control valve, the tester can immediately press the switch in an emergency to cut off the power supply to the main control valve, thereby restoring the vehicle's braking system and ensuring the safety of the testing process.

[0010] In a possible implementation of the first aspect, the control valves in the valve assembly are normally closed valves. The at least one branch control valve (e.g., the first control valve and the second control valve) and the main control valve may be solenoid valves. Furthermore, the control valves may be normally closed valves, i.e., they are in an off state when the power is off. In this way, when the test is completed or an emergency occurs during the test, when the power supply of the test device is switched, the at least one branch control valve and the main control valve can quickly return to the off state when the power is off, thereby enabling the brake lines in the brake system to quickly return to normal after failure.

[0011] In one possible implementation of the first aspect, the valve assembly further includes a shutoff valve for connecting the at least one branch control valve to the reservoir; the shutoff valve is configured to be open when the device is in a testing state and closed when the device is in a non-testing state. The device being in the testing state may mean that one or more brake lines in the brake system have failed due to the conduction of one or more control valves; the device being in the non-testing state may mean that all control valves in the device are closed, allowing the brake lines in the brake system to brake normally. Optionally, the shutoff valve is a mechanical shutoff valve. In this possible implementation, when the device is required to test a brake line failure, the shutoff valve can be opened to allow brake fluid during the test to return to the reservoir, enabling continuous testing. When the device is no longer required to test a brake line failure or when testing is complete, the shutoff valve can be closed to ensure normal operation of the brake system. Furthermore, when the shutoff valve is a mechanical valve, the safety of shutting off the connection between the reservoir's fluid inlet and the brake line is improved, and the shutoff valve cannot be accidentally opened due to a device failure or external electromagnetic interference.

[0012] In one possible implementation of the first aspect, the brake system further includes a second brake line, and the device further includes a second pressure sensor; one end of a second control valve in the at least one branch control valve is connected to the second brake line, and the other end of the second control valve is connected to the reservoir; the second control valve is configured to connect or disconnect the second brake line from the reservoir; the second pressure sensor is configured to measure second pressure information of the second brake line; and the controller is further configured to control the connection or disconnection of the second control valve and obtain the second pressure information, which is used to determine failure of the second brake line. In this possible implementation, the controller controls the connection of the second control valve so that brake fluid flowing into the second brake line can pass through the second control valve and then flow back to the reservoir. This allows for recycling of the brake fluid during failure testing, thereby enabling the device to perform multiple consecutive tests on the brake lines of the vehicle brake system.

[0013] In one possible implementation of the first aspect, the controller is further configured to receive a test instruction and control the opening or closing of at least one valve in the valve assembly according to the test instruction. Optionally, the test instruction is sent by a host computer; or, the device further includes a command transmitter configured to send the test instruction to the controller. In this possible implementation, the controller controls the opening or closing of the valve assembly according to the test instruction, thereby enabling continuous automated testing of brake line failures.

[0014] In one possible implementation of the first aspect, the device further includes: at least one tee, through which at least one brake line in the brake system is connected to the at least one branch control valve. This possible implementation provides a simple and effective method for connecting the brake line and the control valve.

[0015] In a possible implementation of the first aspect, the device further includes a first valve block, the first valve block including a first control valve, a first interface and a second interface connected to one end of the first control valve, and a third interface connected to the other end of the first control valve, the first interface being used to connect to the first brake line, the second interface being used to connect to the first pressure sensor, and the third interface being used to connect to the reservoir. Optionally, the first valve block further includes: a main control valve and a shut-off valve connected between the other end of the first control valve and the third interface. Optionally, the first valve block further includes: a second control valve, a sixth interface and a seventh interface connected to one end of the second control valve, the sixth interface being used to connect to the second brake line, the seventh interface being used to connect to the second pressure sensor, and the other end of the second control valve being connected to the third interface. In the above possible implementation, by integrating all valves in the valve assembly into one valve block, the integration of the valve assembly can be improved, thereby improving the integration of the device and reducing the occupied volume of the device.

[0016] In a possible implementation of the first aspect, the device further comprises a first valve block, the first valve block comprising a first control valve, a first interface and a second interface connected to one end of the first control valve, and a third interface connected to the other end of the first control valve, the first interface being used to connect to a first brake line, the second interface being used to connect to a first pressure sensor, and the third interface being used to connect to the reservoir; the first brake line comprising a first line section and a second line section, the first valve block further comprising a fourth interface, the first interface being used to connect to the first line section, and the fourth interface being used to connect to the second line section. Optionally, the device further comprises a second valve block, the second valve block comprising a fourth interface, a fifth interface, and a main line control valve and a shut-off valve connected between the fourth interface and the fifth interface, the fourth interface being used to connect to the third interface, and the fifth interface being used to connect to the reservoir. In the above possible implementation, the arrangement of the first and second valve blocks can maintain the original structure of the brake line in the vehicle, thereby reducing the complexity of installing the test state on the vehicle.

[0017] In a second aspect, a method for testing a brake system is provided, wherein the brake system includes a reservoir and a first brake line, the device includes a valve assembly, the valve assembly includes at least one branch control valve, one end of a first control valve in the at least one branch control valve is connected to the first brake line, and the other end of the first control valve is connected to the reservoir; the method includes: when testing the first brake line, controlling the first control valve to be turned on to connect the first brake line and the reservoir, so that the first brake line is disabled; obtaining pressure information of the first brake line to obtain first pressure information, the first pressure information being used to determine that the first brake line has failed; at the end of the first brake line test, controlling the first control valve to be turned off to cut off the connection between the first brake line and the reservoir, so that the first brake line is restored.

[0018] In a possible implementation of the second aspect, the device also includes a main control valve, which is connected between the at least one branch control valve and the liquid reservoir. The method also includes: when there is a control valve conduction in the at least one branch control valve, controlling the main control valve to conduct, so as to conduct the at least one branch control valve and the liquid reservoir.

[0019] In a possible implementation manner of the second aspect, the method further includes: when a first instruction is received or the occurrence of a first event is detected, cutting off the power supply to the main control valve.

[0020] In a possible implementation of the second aspect, the valve assembly also includes a stop valve, which is connected between the at least one branch control valve and the liquid reservoir. The method also includes: when the device is in a test state, turning on the stop valve; when the device is in a non-test state, turning off the stop valve.

[0021] In a possible implementation of the second aspect, the braking system also includes a second brake line, one end of a second control valve in the at least one branch control valve is connected to the second brake line, and the other end of the second control valve is connected to the reservoir. The method also includes: when testing the second brake line, controlling the second control valve to be turned on to connect the second brake line and the reservoir, thereby causing the second brake line to fail; obtaining second pressure information of the second brake line, the second pressure information being used to determine the failure of the second brake line; and at the end of the second brake line test, controlling the second control valve to be turned off to cut off the connection between the second brake line and the reservoir, thereby restoring the second brake line.

[0022] In a possible implementation of the second aspect, the method further includes: receiving a test instruction, and controlling the on or off of at least one valve in the valve set according to the test instruction. Optionally, the method further includes: sending the test instruction.

[0023] According to a third aspect, a braking system testing device is provided, wherein the braking system includes a reservoir and a first brake line, and the device includes a valve assembly, wherein the valve assembly includes at least one branch control valve, wherein one end of a first control valve in the at least one branch control valve is connected to the first brake line, and the other end of the first control valve is connected to the reservoir; the device also includes: a first control unit, configured to control the first control valve to be turned on when testing the first brake line, so as to turn the first brake line on and off, so as to turn the first brake line on and off, so as to restore the first brake line; a first measuring unit, configured to obtain pressure information of the first brake line and obtain first pressure information, wherein the first pressure information is used to determine that the first brake line has failed; and the first control unit, configured to control the first control valve to be turned off when the first brake line test is completed, so as to turn off the first brake line and the reservoir, so as to restore the first brake line.

[0024] In a possible implementation of the third aspect, the device also includes a main control valve, which is connected between the at least one branch control valve and the liquid reservoir. The device also includes: a second control unit, which is used to control the main control valve to be turned on when a control valve is turned on in the at least one branch control valve, so as to turn on the at least one branch control valve and the liquid reservoir.

[0025] In a possible implementation manner of the third aspect, the device further includes: a switch unit, configured to cut off power supply to the main control valve when a first instruction is received or an occurrence of a first event is detected.

[0026] In a possible implementation of the third aspect, the valve assembly further includes a cut-off unit, which is connected between the at least one branch control valve and the liquid reservoir; the cut-off unit is used to be turned on when the device is in a test state and to be turned off when the device is in a non-test state.

[0027] In a possible implementation of the third aspect, the braking system also includes a second brake line, one end of the second control valve in the at least one branch control valve is connected to the second brake line, and the other end of the second control valve is connected to the reservoir, and the device also includes: a third control unit, which is used to control the second control valve to be turned on when testing the second brake line, so as to turn the second brake line and the reservoir on, so as to disable the second brake line; a second measuring unit, which is used to obtain second pressure information of the second brake line, and the second pressure information is used to determine the failure of the second brake line; the third control unit is also used to control the second control valve to be turned off at the end of the second brake line test, so as to shut off the second brake line and the reservoir, so as to restore the second brake line.

[0028] In a possible implementation of the third aspect, the apparatus further includes: a receiving unit configured to receive a test instruction, the test instruction being configured to instruct the on or off of at least one valve in the valve set. Optionally, the apparatus further includes: a sending unit configured to send the test instruction.

[0029] In another aspect of the present application, a first valve block is further provided, the first valve block including a first control valve, a first interface and a second interface connected to one end of the first control valve, and a third interface connected to the other end of the first control valve, the first interface being used to connect to the first brake line, the second interface being used to connect to the first pressure sensor, and the third interface being used to connect to the reservoir. Optionally, the first valve block further includes: a main control valve and a shut-off valve connected between the other end of the first control valve and the third interface. Optionally, the first valve block further includes: a second control valve, a sixth interface and a seventh interface connected to one end of the second control valve, the sixth interface being used to connect to the second brake line, the seventh interface being used to connect to the second pressure sensor, and the other end of the second control valve being connected to the third interface.

[0030] In another aspect of the present application, a first valve block is also provided, which includes a first control valve, a first interface and a second interface connected to one end of the first control valve, and a third interface connected to the other end of the first control valve, the first interface is used to connect the first brake line, the second interface is used to connect the first pressure sensor, and the third interface is used to connect the fluid reservoir; the first brake line includes a first line section and a second line section, and the first valve block also includes a fourth interface, the first interface is used to connect the first line section, and the fourth interface is used to connect the second line section.

[0031] In another aspect of the present application, a second valve block is also provided, which includes a fourth interface, a fifth interface, and a main control valve and a shut-off valve connected between the fourth interface and the fifth interface. The fourth interface is used to connect to the third interface, and the fifth interface is used to connect to the liquid reservoir.

[0032] In another aspect of the present application, a vehicle-mounted device is also provided, which includes a braking system testing device, which is the braking system testing device provided by the first aspect or any possible implementation of the first aspect, or the braking system testing device provided by the third aspect or any possible implementation of the third aspect.

[0033] In another aspect of the present application, a vehicle is also provided, which includes: a vehicle braking system, and a braking system testing device, which is the braking system testing device provided by the first aspect or any possible implementation of the first aspect, or the braking system testing device provided by the third aspect or any possible implementation of the third aspect.

[0034] In another aspect of the present application, a computer-readable storage medium is provided, in which a computer program or instruction is stored. When the computer program or instruction is executed by a device, the device implements the method provided by the second aspect or any possible implementation of the second aspect.

[0035] In another aspect of the present application, a computer program product is provided, which includes a computer program or instructions. When the computer program or instructions are executed by a device, the device implements the method provided by the second aspect or any possible implementation of the second aspect.

[0036] It can be understood that the braking system testing method, device, vehicle-mounted device, vehicle, computer-readable storage medium and computer program product provided above all include the contents described in the first aspect. Therefore, the beneficial effects that can be achieved can refer to the beneficial effects of the first aspect above and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] FIG1 is a schematic structural diagram of a vehicle braking system provided in an embodiment of the present application;

[0038] FIG2 is a schematic structural diagram of a brake system testing device provided in an embodiment of the present application;

[0039] FIG3 is a schematic structural diagram of another brake system testing device provided in an embodiment of the present application;

[0040] FIG4 is a schematic structural diagram of another brake system testing device provided in an embodiment of the present application;

[0041] FIG5 is a schematic structural diagram of another brake system testing device provided in an embodiment of the present application;

[0042] FIG6 is a schematic structural diagram of another brake system testing device provided in an embodiment of the present application;

[0043] FIG7 is a schematic structural diagram of another brake system testing device provided in an embodiment of the present application;

[0044] FIG8 is a schematic flow chart of a brake system testing method provided in an embodiment of the present application;

[0045] FIG9 is a schematic diagram of valve control in a brake system test according to an embodiment of the present application;

[0046] FIG10 is a schematic diagram of an installation test of a brake system testing device provided in an embodiment of the present application;

[0047] FIG11 is a schematic structural diagram of another braking system testing device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0048] The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application. In the present application, "at least one" refers to one or more, and "plurality" refers to two or more. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: the existence of A alone, the existence of A and B at the same time, and the existence of B alone, where A and B can be singular or plural. The character " / " generally indicates that the associated objects before and after are in an "or" relationship. "At least one of the following" or similar expressions refers to any combination of these items, including any combination of single or plural items. For example, at least one of a, b or c can represent: a, b, c, a and b, a and c, b and c or a, b and c, where a, b and c can be single or multiple. In addition, in the embodiments of the present application, words such as "first" and "second" do not limit the quantity and order.

[0049] In this application, words such as "exemplary" or "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described in this application as "exemplary" or "for example" should not be construed as preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "for example" is intended to present the relevant concepts in a concrete manner.

[0050] Before introducing the embodiments of the present application, the relevant contents of the vehicle braking system involved in this application are first introduced and explained. The vehicle braking system, also known as the vehicle brake system, is an important component of the vehicle and can be used to apply a certain degree of resistance to certain parts of the vehicle (such as wheels) to achieve the purpose of slowing down or stopping the vehicle, thereby providing safety during the vehicle's driving. Hydraulic braking is a commonly used braking method in vehicle braking systems. The principle of hydraulic braking is mainly that the master brake cylinder uses brake fluid as the transmission medium to be transported to each brake cylinder through the brake pipeline to achieve the purpose of vehicle braking.

[0051] The structure of a vehicle brake system based on hydraulic braking is illustrated below using Figure 1. As shown in Figure 1, the vehicle brake system may include: a master brake cylinder 1, multiple brake lines 2, multiple brake wheel cylinders 3, and multiple brakes 4. The multiple brake lines 2 may correspond one to one with the multiple brake wheel cylinders 3 and the multiple brakes 4. The master brake cylinder 1 is connected to one end of each of the multiple brake lines 2, the other end of each of the multiple brake lines 2 is connected to one end of a corresponding brake wheel cylinder 3, and the other end of each brake wheel cylinder 3 is connected to the corresponding brake 4.

[0052] The master brake cylinder 1, the multiple brake lines 2, and the multiple brake cylinders 3 are filled with brake fluid, thereby forming a closed pressure transmission system. Optionally, when the vehicle requires a large volume of brake fluid and the capacity of the master brake cylinder 1 is small, the vehicle braking system may further include a reservoir connected to the master brake cylinder 1 and the multiple brake lines 2.

[0053] In addition, the master brake cylinder 1 and the multiple brake wheel cylinders 3 may each include a piston. When the driver depresses the brake pedal while the vehicle is in motion, the piston of the master brake cylinder 1 squeezes inward, increasing the pressure of the brake fluid within the master brake cylinder 1. The brake fluid then flows through the multiple brake lines 2 and into the multiple brake wheel cylinders 3, pushing the pistons of each brake wheel cylinder 3 outward, thereby transmitting the braking force to the multiple brakes 4 and causing the multiple brakes 4 to apply the brakes. When the driver releases the brake pedal, the piston of the master brake cylinder 1 returns to its original position under the pressure of the brake fluid. The pistons of the multiple brake wheel cylinders 3 and the multiple brakes 4 also return to their original positions, releasing the brakes on the wheels.

[0054] Optionally, the multiple brake lines 2 can be independently connected to the brake master cylinder 1, or at least two brake lines 2 among the multiple brake lines 2 can be combined and connected to the brake master cylinder 1. For example, taking the multiple brake lines 2 as an example including four brake lines, as shown in (a) of FIG1 , each brake line 2 among the multiple brake lines 2 can be independently connected to the brake master cylinder 1, or, as shown in (b) of FIG1 , every two brake lines 2 among the multiple brake lines 2 can be combined and connected to the brake master cylinder 1.

[0055] The vehicle braking system shown in FIG1 is merely exemplary, and is described by taking the example that the multiple brake lines 2 include four brake lines. The vehicle braking system shown in FIG1 does not constitute a limitation to the embodiments of the present application.

[0056] Figure 2 is a schematic diagram of the structure of a brake system testing device provided in an embodiment of the present application. The device is used to test a brake system, which may be the brake system provided above. The brake system includes a fluid reservoir 10, a brake control device 11, and at least two brake lines 20. The brake control device 11 is connected to the at least two brake lines 20 and can be used to control the braking of the at least two brake lines 20. The fluid reservoir 10 can be used to store brake fluid to provide brake fluid to the vehicle brake system. The at least two brake lines 20 include a first brake line 21.

[0057] As shown in FIG2 , the apparatus includes a controller 30, a valve assembly 40, and at least one pressure sensor 50. The valve assembly 40 includes at least one branch control valve, which includes a first control valve 41. The at least one pressure sensor 50 includes a first pressure sensor 51. One end of the first control valve 41 is used to connect to the first brake line 21, and the other end of the first control valve 41 is used to connect to the reservoir 10.

[0058] Optionally, the reservoir 10 has a fluid outlet and a fluid inlet, and the first brake line 21 has a port P1 and a port P2. The fluid outlet of the reservoir 10 is connected to the brake control device 11, which is also connected to the port P1 of the first brake line 21 (hereinafter referred to as the first connection). Thus, when the brake control device 11 controls the brake line, the first brake line 21 can receive brake fluid flowing out of the fluid outlet of the reservoir 10 through the first connection. The reservoir 10 can also receive brake fluid flowing out of the port P1 of the first brake line 21 through the first connection. Port P2 of the first brake line 21 is connected to one end of the first control valve 41, and the fluid inlet of the reservoir 10 is connected to the other end of the first control valve 41 (hereinafter referred to as the second connection). Thus, the reservoir 10 can receive brake fluid flowing out of the port P2 of the first brake line 21 through the second connection.

[0059] Furthermore, the braking system may also include a first brake cylinder connected to the first brake line 21, and a first brake connected to the first brake cylinder, wherein the first brake can be used to brake the wheels on the vehicle. In one example, the first brake line 21 further has an interface P3, and the interface P3 of the first brake line 21 is connected to the first brake cylinder. For example, the device also includes a three-way pipe, and a three-way pipe is connected in series in the middle of the first brake line 21, so that the interfaces at both ends of the first brake line 21 can serve as the above-mentioned interfaces P1 and P3, and the third interface of the three-way pipe connected in series in the middle of the first brake line 21 can serve as the above-mentioned interface P2.

[0060] In an embodiment of the present application, the first control valve 41 is used to connect or disconnect the first brake line 21 and the fluid reservoir 10, that is, the first control valve 41 can be used to connect or disconnect the above-mentioned second connection. The first pressure sensor 51 is used to measure the first pressure information of the first brake line 21, for example, to measure the pressure information of the first brake line 21 when the second connection is disconnected and transmit it to the controller 30. The controller 30 is used to control the connection or disconnection of the first control valve 41 and obtain the first pressure information, and the first pressure information is used to determine the failure of the first brake line 21. Optionally, the controller 30 can also be used to power the at least one branch control valve and the at least one pressure sensor. For example, the controller 30 can be used to power the first control valve 41 and the first pressure sensor 51.

[0061] In one possible embodiment, when it is necessary to measure the braking effect of the other brake lines of the at least two brake lines 20 in the event of a failure of the first brake line 21, the controller 30 may control the conduction of the first control valve 41 to connect the first brake line 21 to the reservoir 10 through the first control valve 41 (i.e., the second connection is connected). In this case, when braking is performed through the brake system, the brake fluid flowing out of the outlet of the reservoir 10 will flow into the first brake line 21 (i.e., the brake fluid flows through the first connection), and then flows out of the port P2 of the first brake line 21 and back into the reservoir 10 through the first control valve 41 (i.e., flows through the second connection). It will not flow out of the port P3 of the first brake line 21 (because the first connection and the second connection form a flow loop under the action of pressure), thereby achieving the failure of the first brake line 21. Then, the first pressure information of the first brake line 21 when it fails is measured by the first pressure sensor 51 and the first pressure information is transmitted to the controller 30 , so that the controller 30 can determine that the first brake line 21 fails based on the first pressure information.

[0062] In another possible embodiment, after the failure measurement of the first brake line 21 is completed, the controller 30 can control the closing of the first control valve 41 to shut off the first brake line 21 through the connection between the first control valve 41 and the reservoir 10 (i.e., the second connection is shut off). Furthermore, when normal braking of the first brake line 21 is required, braking can be performed through the brake system. At this time, the brake fluid flowing out of the outlet of the reservoir 10 will flow into the first brake line 21 (i.e., the brake fluid flows through the above-mentioned first connection) and out of the port P3 of the first brake line 21, and will not flow out of the port P2 of the first brake line 21 (because the second connection is shut off), thereby achieving normal braking of the first brake line 21.

[0063] In an embodiment of the present application, one end of the first control valve 41 is connected to the first brake line 21, and the other end of the first control valve 41 is connected to the reservoir 10. In this way, when the first brake line 21 is tested for failure, the first control valve 41 is controlled by the controller 30 to be conductive, so that the brake fluid flowing into the first brake line 21 can pass through the first control valve 41 and then flow back to the reservoir 10. In this way, the brake fluid can be recycled during the failure test, so that the device can perform multiple continuous tests on the brake lines in the vehicle braking system.

[0064] Furthermore, as shown in FIG3 , the at least two brake lines 20 further include a second brake line 22, the at least one pressure sensor 50 further includes a second pressure sensor 52, and the at least one branch control valve further includes a second control valve 42. One end of the second control valve 42 is configured to be connected to the second brake line 22, and the other end of the second control valve 42 is configured to be connected to the fluid reservoir 10.

[0065] Optionally, the second brake line 22 has a port Q1 and a port Q2. The fluid outlet of the reservoir 10 is connected to the brake control device 11, which is also connected to the port Q1 of the second brake line 22 (hereinafter referred to as the third connection). Thus, when the brake control device 11 controls the brake line, the second brake line 22 can receive brake fluid flowing from the fluid outlet of the reservoir 10 through the second brake line 22. The reservoir 10 can also receive brake fluid flowing from the port Q1 of the second brake line 22 through the first connection. The port Q2 of the second brake line 22 is connected to one end of the second control valve 42, and the fluid inlet of the reservoir 10 is connected to the other end of the second control valve 42. Hereinafter, the connection between the second brake line 22 and the reservoir 10 through the second control valve 42 may be referred to as the fourth connection. Thus, the reservoir 10 can receive brake fluid flowing from the port Q2 of the second brake line 22 through the second connection.

[0066] Accordingly, the braking system may also include a second brake cylinder connected to the second brake line 22, and a second brake connected to the second brake cylinder. The second brake can be used to brake the wheels of the vehicle. In one example, the second brake line 22 further has a port Q3, which is connected to the second brake cylinder. For example, a tee is connected in series in the middle of the second brake line 22, so that the ports at both ends of the second brake line 22 can serve as the aforementioned ports Q1 and Q3, and the third port of the tee connected in series in the middle of the second brake line 22 can serve as the aforementioned port Q2.

[0067] In this embodiment of the present application, second control valve 42 is configured to connect or disconnect the second brake line 22 from the fluid reservoir 10. Specifically, second control valve 42 can be configured to connect or disconnect the aforementioned fourth connection. Second pressure sensor 52 is configured to measure second pressure information of second brake line 22, for example, to measure the pressure of second brake line 22 when the fourth connection is disconnected, and transmit the information to controller 30. Controller 30 is configured to control the connection or disconnection of second control valve 42 and to obtain second pressure information, which is used to determine failure of second brake line 22. Optionally, controller 30 can also be configured to supply power to second control valve 42.

[0068] The detailed description of using the device to test the failure of the second brake line 22 or to restore the second brake line 22 from failure to a normal state is similar to the above-mentioned description of testing the failure of the first brake line 21 and restoring the first brake line 21 from failure to a normal state. Please refer to the description above for details, and the embodiments of the present application will not be repeated here.

[0069] In addition, the at least two brake lines 20 may include two brake lines or more than two brake lines. The device can be used to measure the failure of some brake lines or all brake lines in the at least two brake lines 20. The test principle and process of each brake line are similar to the test principle and process of the above-mentioned first brake line 21 and the second brake line 22, and will not be repeated in the embodiments of the present application.

[0070] In the above-mentioned Figures 2 and 3, the structure of the device is illustrated by taking the example that the at least two brake lines 20 include four brake lines, and only taking the example that the device is used to test the first brake line 21 and the second brake line 22. Figures 2 and 3 do not constitute a limitation on the embodiments of the present application.

[0071] Furthermore, as shown in FIG3 , the valve assembly 40 in the device further includes a main circuit control valve 45, which is used to connect the at least one branch circuit control valve to the liquid reservoir 10. For example, one end of the main circuit control valve 45 is used to connect to one end of the first control valve 41 and one end of the second control valve 42, respectively, and the other end of the main circuit control valve 45 is used to connect to the liquid inlet of the liquid reservoir 10.

[0072] The main control valve 45 is configured to connect the at least one branch control valve to the reservoir 10 when one of the at least one branch control valves is in conduction mode. The controller 30 is further configured to control the conduction or shutoff of the main control valve. Optionally, the controller 30 is also configured to supply power to the main control valve.

[0073] In one possible embodiment, when it is necessary to test the failure of one or more brake lines 20 in the at least two brake lines 20, the controller 30 can control the control valve in the at least one branch control valve connected to the one or more brake lines to be turned on, and control the main control valve 45 to be turned on, so that the brake fluid flowing from the outlet of the reservoir 10 into the one or more brake lines passes through the corresponding control valve, converges at the main control valve 45, and then flows through the main control valve 45 and flows back to the reservoir 10, so as to make the one or more brake lines fail.

[0074] For example, when it is necessary to test the failure of the first brake line 21, the controller 30 can control the first control valve 41 to be turned on, and control the main control valve 45 to be turned on, so that the brake fluid flowing out of the outlet of the reservoir 10 will flow into the first brake line 21, flow out from the interface P2 of the first brake line 21, and then flow back to the reservoir 10 after passing through the first control valve 41 and the main control valve 45, thereby realizing the failure of the first brake line 21.

[0075] In another possible embodiment, when there is no need to test the failure of the at least two brake lines 20, the controller 30 can control the at least one branch control valve to be closed, and control the main control valve 45 to be closed, so that the brake fluid flowing from the outlet of the reservoir 10 into the at least two brake lines 20 enters the corresponding brake cylinders to achieve normal braking of the at least two brake lines 20.

[0076] In the above embodiment, by connecting the main line control valve 45 between the at least one branch line control valve and the reservoir 10, safety during brake system testing can be improved. This is because, during brake system testing, isolating or isolating the pressure in the brake line from the atmospheric pressure in the reservoir 10 using only a single branch line control valve poses a certain risk, as the branch line control valve can easily be damaged by the pressure from both sides.

[0077] Optionally, the device may further include a switch SW, which may be manually or automatically controlled. The switch SW may be configured to close the main circuit control valve 45 upon receiving a first instruction or detecting a first event. The first instruction may be an operation received from a driver or tester, and the first event may be a vehicle loss of control event. For example, in the event of an emergency such as vehicle loss of control during a brake system test or an unexpected condition at the test site, the tester may operate to close the main circuit control valve 45. Vehicle loss of control may include damage to a portion of the brake line or the inability to brake some wheels.

[0078] In one example, the controller 30 is used to supply power to the main control valve 45. The switch SW is connected between the controller 30 and the main control valve 45. That is, the switch SW is connected to the power supply circuit of the main control valve 45. The switch SW serves as an emergency stop switch. In the event of an emergency during a brake system test, the tester can immediately press the emergency stop switch to shut off the power supply to the main control valve 45, thereby restoring the vehicle's brake system.

[0079] Optionally, the at least one branch control valve (e.g., the first control valve 41 and the second control valve 42) and the main control valve 45 may be solenoid valves. Furthermore, the control valves may be normally closed valves, i.e., they are in a closed state when the power is off. In this way, when the test is completed or an emergency occurs during the test, when the power supply of the test device is switched, the at least one branch control valve and the main control valve 45 can quickly return to the closed state when the power is off, thereby enabling the brake lines in the brake system to quickly return to normal operation after failure.

[0080] In some embodiments, the controller 30 is further configured to receive a test instruction and, based on the test instruction, control the on / off state of at least one valve in the valve assembly 40. For example, the controller 30 may be configured to control the on / off state of at least one branch control valve (e.g., the first control valve 41 and the second control valve 42) and the main control valve 45 based on the test instruction.

[0081] Optionally, the test instruction may be sent by a host computer 61, and the host computer and the device may be connected via a controller area network (CAN) bus. Alternatively, the device further includes a command transmitter 62, which is used to send the test instruction to the controller 30. Exemplarily, the command transmitter 62 may be a handle, which may be provided with a plurality of buttons and a display screen. The plurality of buttons may be used to control the device to perform a brake system test, and the display screen may be used to display the pressure information measured by the at least one pressure sensor 50. The display screen may also be used to display the on or off status of different control valves, etc.

[0082] Furthermore, as shown in FIG3 , the valve assembly 40 in the device also includes a shutoff valve 46 , which is used to connect the at least one branch control valve to the liquid reservoir 10 . For example, the shutoff valve 46 is connected between the main control valve 45 and the liquid inlet of the liquid reservoir 10 . The shutoff valve 46 is configured to be open when the device is in a testing state and closed when the device is not in a testing state. Optionally, the shutoff valve 46 may be a mechanical valve.

[0083] Among them, the device being in a testing state may mean that one or more brake lines in the braking system fail due to the conduction of one or more control valves (for example, the main control valve 45 and the branch control valve); the device being in a non-testing state may mean that all control valves in the device are closed, and the brake lines in the braking system can brake normally.

[0084] Specifically, when the device is needed to test for brake line failure, the shutoff valve 46 can be opened to connect the fluid inlet of the reservoir 10 and the at least two brake lines 20, allowing the brake fluid during the test to return to the reservoir 10, achieving continuous testing. When the device is no longer needed to test for brake line failure or the test is complete, the shutoff valve 46 can be closed to cut off the connection between the fluid inlet of the reservoir 10 and the at least two brake lines 20, ensuring the normal operation of the brake system. Furthermore, when the shutoff valve 46 is a mechanical valve, the safety of shutting off the connection between the fluid inlet of the reservoir 10 and the at least two brake lines 20 can be improved, and the shutoff valve 46 will not be accidentally opened due to a malfunction of the device or external electromagnetic interference.

[0085] Furthermore, the device may include at least one valve block, and all or part of the at least one branch control valve (e.g., the first control valve 41 and the second control valve 42), the main control valve 45, and the shut-off valve 46 in the valve assembly 40 may be disposed in the at least one valve block. Optionally, when all or part of the valve assembly 40 is disposed in the at least one valve block, the original structure of the at least two brake lines 20 may be maintained, or the structure of the at least two brake lines 20 may be adjusted.

[0086] 4 and 5 , the device includes a valve block, and all valves in the valve assembly 40 are arranged in the valve block.

[0087] In one possible embodiment, as shown in FIG4 , the at least two brake lines 20 include four brake lines, designated 21-24, each of which includes a line segment. The device includes a first valve block, in which the at least one branch control valve, the main line control valve 45, and the shutoff valve 46 are all disposed. The at least one branch control valve includes four control valves 41-44 corresponding to the four brake lines 21-24, respectively.

[0088] Specifically, the first valve block includes four control valves 41-44, the main control valve 45, the shutoff valve 46, four first interfaces and four second interfaces connected to one end of each of the four control valves 41-44, and a third interface. Each first interface is connected to a brake line, each second interface is connected to a pressure sensor, and the third interface is connected to the fluid reservoir 10. One end of the main control valve 45 is connected to the other end of the four control valves 41-44, the other end of the main control valve 45 is connected to one end of the shutoff valve 46, and the other end of the shutoff valve 46 is connected to the third interface.

[0089] In another possible embodiment, as shown in Figure 5, the at least two brake lines 20 include four brake lines, each of which includes a first line segment and a second line segment. The first line segments of the four brake lines are denoted as 21a-24a, and the second line segments are denoted as 21b-24b. The device includes a first valve block, in which the at least one branch control valve, the main line control valve 45, and the shutoff valve 46 are all disposed. The at least one branch control valve includes four control valves 41-44 corresponding to the four brake lines, respectively.

[0090] Specifically, the first valve block includes four control valves 41-44, the main line control valve 45, the shutoff valve 46, four first interfaces and four second interfaces connected to one end of each of the four control valves 41-44, a third interface, and four fourth interfaces. Each first interface is used to connect to a first section of the brake line, each second interface is used to connect to a pressure sensor, the third interface is used to connect to the fluid reservoir 10, and each fourth interface is used to connect to a second section of the brake line. One end of the main line control valve 45 is connected to the other end of the four control valves 41-44, the other end of the main line control valve 45 is connected to one end of the shutoff valve 46, and the other end of the shutoff valve 46 is connected to the third interface.

[0091] In the two possible embodiments described above, by integrating all of the valve assembly 40 into a single valve block, the integration level of the valve assembly 40 can be increased, thereby increasing the integration level of the device and reducing the volume occupied by the device. Furthermore, the arrangement of the first valve block shown in FIG4 maintains the original structure of the vehicle's brake lines, thereby reducing the complexity of installing the test device on the vehicle. The arrangement of the first valve block shown in FIG5 adjusts the structure of the vehicle's brake lines to a certain extent, thereby reducing the space occupied by the at least two brake lines 20 and the test device as a whole compared to FIG4 , and also, to a certain extent, improving the flexibility of installing the test device on the vehicle.

[0092] The following, using Figures 6 and 7 , details the device, which includes multiple valve blocks, each of which is equipped with one or more valves from the valve assembly 40. Optionally, each of the at least one branch control valve is provided in a single valve block, and the main control valve 45 and the shut-off valve 46 are provided in a single valve block. The following description uses the first brake line 21 of the at least two brake lines 20 as an example.

[0093] In one possible embodiment, as shown in FIG6 , the first brake line 21 includes a line section. The device includes a first valve block and a second valve block, wherein the first control valve 41 is disposed in the first valve block, and the main line control valve 45 and the shut-off valve 46 are disposed in the second valve block.

[0094] Specifically, the first valve block includes a first control valve 41, a first port and a second port connected to one end of the first control valve 41, and a third port connected to the other end of the first control valve 41. The first port is used to connect to the first brake line 21, and the second port is used to connect to the first pressure sensor 51. The second valve block includes two ports, and the main line control valve 45 and the shutoff valve 46 connected between the two ports. Specifically, one end of the main line control valve 45 is connected to one port, the other end of the main line control valve 45 is connected to one end of the shutoff valve 46, and the other end of the shutoff valve 46 is connected to the other port.

[0095] In another possible embodiment, as shown in FIG7 , the first brake line 21 includes a first line section 21 a and a second line section 21 b. The device includes a first valve block and a second valve block, wherein the first control valve 41 is disposed in the first valve block, and the main line control valve 45 and the shut-off valve 46 are disposed in the second valve block.

[0096] Specifically, the first valve block includes a first control valve 41, a first interface, a second interface, and a third interface connected to one end of the first control valve 41, and a fourth interface connected to the other end of the first control valve 41. The first interface is used to connect to the first pipeline section 21a of the first brake line 21, the second interface is used to connect to the first pressure sensor 51, and the fourth interface is used to connect to the second pipeline section 21b of the first brake line 21. The second valve block includes two interfaces, and the main line control valve 45 and the shut-off valve 46 connected between the two interfaces. Specifically, one end of the main line control valve 45 is connected to one interface, the other end of the main line control valve 45 is connected to one end of the shut-off valve 46, and the other end of the shut-off valve 46 is connected to the other interface.

[0097] The control valves corresponding to the other brake lines 20 in the at least two brake lines 20 may also be set up using a valve block similar to the first control valve 41. For details, please refer to the relevant description of the first valve block; in addition, the second valve block may also include more interfaces, which can be used to connect to the valve blocks where different branch control valves are located. The embodiments of the present application will not be repeated here.

[0098] In the two possible embodiments described above, by integrating the different valves in the valve assembly 40 into different valve blocks, the flexibility of configuring the valve assembly 40 can be improved. Furthermore, the configuration of the first valve block shown in FIG6 maintains the original structure of the vehicle's brake lines, thereby reducing the complexity of installing the test device on the vehicle. The configuration of the first valve block shown in FIG7 adjusts the structure of the vehicle's brake lines to a certain extent, thereby reducing the space occupied by the at least two brake lines 20 and the test device as a whole compared to FIG6 , while also improving the flexibility of installing the test device on the vehicle to a certain extent.

[0099] Based on this, as shown in Figure 8, an embodiment of the present application also provides a braking system testing method, which is used to test the braking system of a vehicle. Among them, the method can be applied to any one of the braking system testing devices provided in Figures 2 to 7. The braking system includes a braking control device, a reservoir and at least two brake lines. The device includes a controller, a valve assembly and at least one pressure sensor, the valve assembly includes at least one branch control valve, and the at least one branch control valve includes a first control valve. One end of the first control valve is connected to the first brake line, and the other end of the first control valve is connected to the reservoir.

[0100] S301: When testing the first brake line, control the first control valve to be conductive, so as to connect the first brake line and the reservoir through the first control valve.

[0101] Specifically, when it is necessary to measure the braking effect of the other brake lines of the at least two brake lines in the event of a failure of the first brake line, the first control valve is controlled to establish communication between the first brake line and the reservoir via the first control valve. In this case, when braking is performed using the brake system, brake fluid flowing out of the reservoir's outlet flows into the first brake line, exits port P2 of the first brake line, and then flows back into the reservoir through the first control valve. It does not flow out of port P3 of the first brake line, thereby achieving failure of the first brake line 21.

[0102] S302: Obtain pressure information of the first brake line to obtain first pressure information, where the first pressure information is used to determine whether the first brake line has failed.

[0103] Optionally, first pressure information of the first brake line when it fails is obtained through a first pressure sensor, and the first pressure information is transmitted to the controller, so that the controller can determine that the first brake line has failed based on the first pressure information.

[0104] S303: When the first brake line test is finished, control the first control valve to be closed, so as to cut off the connection between the first brake line and the reservoir through the first control valve.

[0105] After the first brake line failure measurement is completed, the first control valve can be controlled to close, thereby isolating the first brake line through the connection between the first control valve and the reservoir. Furthermore, when normal braking is required in the first brake line, braking can be performed through the brake system. In this case, the brake fluid flowing out of the reservoir's outlet will flow into the first brake line and out through port P3 of the first brake line, rather than out through port P2 of the first brake line, thereby achieving normal braking of the first brake line.

[0106] Similarly, when the at least two brake lines also include a second brake line, one end of the second control valve in the at least one branch control valve is connected to the second brake line, and the other end of the second control valve is connected to the reservoir, the method further includes: when testing for failure of the second brake line, controlling the second control valve to conduct, so as to connect the second brake line and the reservoir through the second control valve, thereby causing the second brake line to fail; obtaining second pressure information of the second brake line, the second pressure information being used to determine failure of the second brake line; and when the second brake line test is completed, controlling the second control valve to close, so as to cut off the connection between the second brake line and the reservoir through the second control valve, thereby restoring the second brake line. The specific description of testing for failure of the second brake line and restoring the second brake line is similar to the above-mentioned description of the first brake line, and will not be repeated herein in the embodiments of the present application.

[0107] Furthermore, when the apparatus further includes a main line control valve connected between at least one branch line control valve and the reservoir, the method further includes: S304. When testing at least one brake line (e.g., testing the first brake line), controlling the main line control valve to conduct, thereby conducting communication between the at least one branch line control valve and the reservoir. S304 and S301 may be performed in any order; FIG8 illustrates S304 after S301 as an example.

[0108] Optionally, when the controller is used to supply power to the main control valve, and the device further includes a switch connected between the controller and the main control valve, the method may further include: when a first instruction is received or a first event is detected, the power supply to the main control valve is turned off by the switch, i.e., the switch is turned off. The first instruction may be an operation received from a driver or a tester, and the first event may be a vehicle loss-of-control event. For example, in an emergency such as vehicle loss-of-control or an unexpected condition at the test site during a braking system test, the tester may operate to turn off the main control valve 45, thereby turning off the power supply to the main control valve through the switch, thereby restoring the vehicle's braking system. The switch may be manually controlled or automatically controlled.

[0109] The at least one branch control valve and the main control valve may be solenoid valves. Furthermore, the control valves may be normally closed valves, i.e., closed when power is off. This allows the at least one branch control valve and the main control valve to quickly return to their closed state when power is switched off after the test is completed or an emergency occurs, thereby enabling the brake lines in the brake system to quickly recover from failure.

[0110] Furthermore, the method further includes: receiving a test instruction, and controlling the on / off state of at least one valve in the valve assembly according to the test instruction. For example, controlling the on / off state of the at least one branch control valve (e.g., the first control valve and the second control valve) and the main control valve according to the test instruction.

[0111] In one example, the test instruction may be sent by a host computer, and the host computer and the device may be connected via a controller area network (CAN) bus. In another example, the device further includes a command transmitter, and the method further includes: sending the test instruction via the command transmitter. In practical applications, the command transmitter may be a handle, which may be provided with multiple buttons and a display screen. The multiple buttons may be used to control the device to perform a brake system test, and the display screen may be used to display pressure information measured by the at least one pressure sensor. The display screen may also be used to display the on or off status of different control valves, etc.

[0112] Furthermore, when the device further includes a shutoff valve connected between the at least one branch control valve and the reservoir, the method further includes: S305. When the device is in a testing state, for example, before the first brake line is deactivated in S301, opening the shutoff valve; and S306. When the device is in a non-testing state, for example, after the first brake line is restored in S303, closing the shutoff valve. Optionally, the shutoff valve may be a mechanical valve.

[0113] Specifically, when the device is needed to test for brake line failure, the shutoff valve can be opened to connect the reservoir's fluid inlet and the at least two brake lines, allowing brake fluid during testing to return to the reservoir, achieving continuous testing. When the device is no longer needed to test for brake line failure or when the test is complete, the shutoff valve can be closed to cut off the connection between the reservoir's fluid inlet and the at least two brake lines, ensuring the normal operation of the brake system. Furthermore, if the shutoff valve is a mechanical valve, the safety of shutting off the connection between the reservoir's fluid inlet and the at least two brake lines can be improved, and the shutoff valve will not be accidentally opened due to a malfunction of the device or external electromagnetic interference.

[0114] To facilitate understanding, the principles and testing process of the brake system testing method are illustrated below using Figures 9 and 10. Figure 9 primarily illustrates the states of the at least one branch control valve, the main control valve, and the shutoff valve. Figure 10 primarily illustrates the process from installation of the device to test completion.

[0115] As shown in FIG9 , when the test starts, the method may include: S11a. Determine whether the vehicle is powered on, if so, jump to S12a and S12b, if not, jump to S20b and S17b; S11b. The state of the shut-off valve, if the valve is open, jump to S13a, if the valve is closed, jump to S13b; S12a. The branch control valve is in the ready state, jump to S14; S14. Determine the control mode, jump to S15a or S15b; S15a. Manual mode; S16a. Handle button command, if the valve is open, jump to S17a, if the valve is closed, jump to S17b; S15b. Program control mode; S16b. Program control command, if the valve is open, jump to S17a, if the valve is closed, jump to S17b; S17a. The branch control valve is turned on, Jump to S19; S17b. Branch control valve closed; S12b. Emergency stop switch status. If pressed (i.e., closed), jump to S20b; if reset (i.e., open), jump to S18; S18. Main control valve in ready state, jump to S19; S19. At least one branch control valve is open. If so, jump to S20a; if not, jump to S20b; S20a. Main control valve is open; S20b. Main control valve is closed; S13a. Shutoff valve is open; S13b. Shutoff valve is closed; After S17a, S20a, and S13a, jump to S21a. If all valves are open, the brake circuit fails; After S17b, S20b, and S13b, jump to S21b. If any one valve is closed, the brake circuit is restored. The above-mentioned valve open refers to valve open, and valve closed refers to valve closed.

[0116] As shown in Figure 10, this method can include the following phases: installation and commissioning, pre-test inspection and preparation, test execution, and test incomplete and completed phases. The installation and commissioning phase specifically includes disconnecting the vehicle's brake lines, connecting the valve assembly, ensuring proper sealing, venting the brake lines, connecting and configuring the controller, and performing a power-on inspection. The pre-test inspection and preparation phase specifically includes performing brake line failure test preparations in accordance with mandatory national standards (GB) or other standards and specifications, and opening the shutoff valve. The test execution phase specifically includes: in manual mode, accelerating the vehicle to a specified test speed at a suitable location, operating the handle to disable the designated brake line while ensuring safety, and performing the braking test. In program-controlled mode, programming the brake failure control logic in the host computer and performing the braking test at a suitable location. During the test, the vehicle's brake system automatically disables and recovers according to the logic. Upon successful completion of a single test, the control valve can be manually or programmatically reset to shut down. If the test is incomplete, no maintenance is required and the test execution phase can be continued. If the test is fully completed, the shutoff valve is closed, shutting down the test equipment system, and concluding the test. During the test, if an unexpected situation such as vehicle loss of control occurs, the control valve can be immediately reset and shut off by operating the handle or emergency stop switch to restore the braking system.

[0117] All relevant contents involved in the above-mentioned embodiments of the brake system testing device can be referred to the corresponding steps of the method embodiment, and the embodiments of this application will not be repeated here.

[0118] In an embodiment of the present application, by connecting a branch control valve between the brake line connection and the reservoir, during a brake system test, the branch control valve is opened, allowing the brake fluid in the brake line to flow through the branch control valve and then back into the reservoir. This allows for the recycling of the brake fluid during failure testing, thereby enabling the device to perform multiple, continuous tests on the brake lines in the vehicle's brake system. Furthermore, connecting a main control valve and a shutoff valve between at least one branch control valve and the reservoir can also improve safety during brake system testing and the safety of the vehicle's brake system during normal braking. Furthermore, in the event of an emergency during a brake system test, the emergency stop switch can be used to shut off the power supply to the main control valve, allowing the vehicle's brake system to quickly recover, further improving the safety of the brake system test.

[0119] Based on this, an embodiment of the present application further provides a brake system testing device, comprising a fluid reservoir and at least two brake lines, the at least two brake lines including a first brake line. The testing device includes a valve assembly, the valve assembly including at least one branch control valve, a first control valve of the at least one branch control valve having one end connected to the first brake line and the other end connected to the fluid reservoir.

[0120] As shown in Figure 11, the device also includes: a first control unit 401, which is used to control the first control valve to be turned on when testing the first brake line, so as to connect the first brake line and the reservoir; a first measuring unit 402, which is used to obtain pressure information of the first brake line to obtain first pressure information, and the first pressure information is used to determine whether the first brake line has failed; the first control unit 401 is also used to control the first control valve to be turned off when the first brake line test is completed, so as to cut off the connection between the first brake line and the reservoir.

[0121] Optionally, the device further includes a main circuit control valve configured to connect the at least one branch circuit control valve to the liquid reservoir. Accordingly, the device further includes a second control unit 403 configured to control the main circuit control valve to be conductive when one of the at least one branch circuit control valves is conductive, thereby connecting the at least one branch circuit control valve to the liquid reservoir.

[0122] Optionally, the device further includes a switch unit 404. The switch unit 404 is configured to: when a first instruction is received or a first event is detected, cut off the power supply to the main control valve.

[0123] Optionally, the valve assembly further includes a cutoff unit 405, which is used to connect the at least one branch control valve to the liquid reservoir. Accordingly, the cutoff unit 405 is used to: conduct when the device is in a test state, and shut off when the device is in a non-test state.

[0124] Furthermore, the at least two brake lines also include a second brake line, one end of the second control valve in the at least one branch control valve is used to be connected to the second brake line, and the other end of the second control valve is used to be connected to the reservoir.

[0125] Correspondingly, the device also includes: a third control unit 406, which is used to control the second control valve to be turned on when testing the second brake line, so as to connect the second brake line and the reservoir; a second measuring unit 407, which is used to obtain second pressure information of the second brake line, and the second pressure information is used to determine the failure of the second brake line; the third control unit 406 is also used to control the second control valve to be turned off when the second brake line test is completed, so as to cut off the connection between the second brake line and the reservoir.

[0126] Optionally, the device further includes: a receiving unit 408 for receiving a test instruction, wherein the test instruction is used to instruct the on or off of at least one valve in the valve set. Further, the device further includes: a sending unit 409 for sending the test instruction.

[0127] All relevant contents involved in the above-mentioned method embodiments and device embodiments can be referred to the device embodiment provided in Figure 11, and the embodiments of this application will not be repeated here.

[0128] In another aspect of the present application, a valve block is provided, which includes a plurality of branch control valves, a main control valve, a shut-off valve, a plurality of first interfaces and a plurality of second interfaces respectively connected to one end of the plurality of branch control valves, and the valve block also includes a third interface. Optionally, the valve block may also include a plurality of fourth interfaces. Each first interface is used to connect to one end of a brake line, each second interface is used to connect to a pressure sensor, the third interface is used to connect to a fluid reservoir, and each fourth interface is used to connect to the other end of a brake line. One end of the main control valve is connected to the other end of the plurality of branch control valves, the other end of the main control valve is connected to one end of the shut-off valve, and the other end of the shut-off valve is connected to the third interface.

[0129] In another aspect of the present application, a valve block is provided, comprising a control valve, a first interface connected to one end of the control valve, a second interface, and a third interface. The first interface is configured to connect to one end of a brake line, the second interface is configured to connect to a pressure sensor, the third interface is configured to connect to a fluid reservoir, and the fourth interface is configured to connect to the other end of a brake line.

[0130] In another aspect of the present application, a valve block is provided, comprising a control valve, a shutoff valve, at least one fifth port, and a sixth port. One end of the control valve is connected to the at least one fifth port, the other end of the control valve is connected to one end of the shutoff valve, and the other end of the shutoff valve is connected to the sixth port.

[0131] In another aspect of the present application, a vehicle-mounted device is provided, which includes a braking system testing device, which can be any braking system testing device provided in the embodiments of the present application.

[0132] In another aspect of the present application, a vehicle is provided, which includes a braking system and a braking system testing device for testing the braking system. The device can be any braking system testing device provided in the embodiments of the present application.

[0133] In another aspect of the present application, a computer-readable storage medium is provided, in which a computer program or instruction is stored. When the computer program or instruction is executed, the method provided in the embodiment of the present application is implemented.

[0134] In another aspect of the present application, a computer program product is provided, which includes: a computer program (also referred to as code, or instructions), which, when executed, enables a computer to execute the method provided in the embodiments of the present application.

[0135] Finally, it should be noted that the above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any changes or substitutions within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. A brake system testing device, characterized in that: The device includes a controller, a valve assembly and a first pressure sensor, wherein the valve assembly includes at least one branch control valve, one end of a first control valve of the at least one branch control valve is used to be connected to a first brake line of a brake system, and the other end of the first control valve is used to be connected to a fluid reservoir of the brake system; wherein, The first control valve is used to connect or disconnect the first brake line and the fluid reservoir; The first pressure sensor is used to measure first pressure information of the first brake line; The controller is used to control the on or off of the first control valve and obtain the first pressure information.

2. The device according to claim 1, characterized in that The valve assembly further comprises a main line control valve, the main line control valve being used to connect the at least one branch line control valve to the liquid reservoir; The main circuit control valve is used to connect the at least one branch circuit control valve and the liquid reservoir when a control valve in the at least one branch circuit control valve is connected; The controller is also used to control the on or off of the main circuit control valve.

3. The device according to claim 2, characterized in that The device further comprises: a switch; The switch is used to shut off the main control valve.

4. The device according to claim 3, characterized in that The switch is connected between the controller and the main control valve; The controller is also used to supply power to the main control valve; The switch is also used to cut off the power supply to the main control valve.

5. The device according to any one of claims 1 to 4, characterized in that: The control valve in the valve assembly is a normally closed valve.

6. The device according to any one of claims 1 to 5, characterized in that The valve assembly further comprises a shut-off valve, the shut-off valve being used to connect the at least one branch control valve to the liquid reservoir; The stop valve is used to be turned on when the device is in a testing state and to be turned off when the device is in a non-testing state.

7. The device according to claim 6, characterized in that The stop valve is a mechanical stop valve.

8. The device according to any one of claims 1 to 7, characterized in that The brake system further includes a second brake line, the device further includes a second pressure sensor, one end of a second control valve of the at least one branch control valve is used to be connected to the second brake line, and the other end of the second control valve is used to be connected to the reservoir; The second control valve is used to connect or disconnect the second brake line and the fluid reservoir; The second pressure sensor is used to measure second pressure information of the second brake line; The controller is further configured to control the on / off switching of the second control valve and obtain the second pressure information.

9. The device according to any one of claims 1 to 8, characterized in that The controller is further configured to receive a test instruction and control the on or off of at least one valve in the valve set according to the test instruction.

10. The device according to claim 9, characterized in that The test instruction is sent by the host computer; or, The device further includes: an instruction transmitter, configured to send the test instruction to the controller.

11. The device according to any one of claims 1 to 10, characterized in that The device further comprises: at least one three-way pipe, through which at least one brake pipeline in the brake system is connected to the at least one branch control valve.

12. The device according to any one of claims 1 to 11, characterized in that The device also includes a first valve block, which includes the first control valve, a first interface and a second interface connected to one end of the first control valve, and a third interface connected to the other end of the first control valve, the first interface is used to connect the first brake line, the second interface is used to connect the first pressure sensor, and the third interface is used to connect the fluid reservoir.

13. The device according to claim 12, characterized in that The first brake line includes a first line section and a second line section. The first valve block further includes a fourth interface. The first interface is used to connect to the first line section, and the fourth interface is used to connect to the second line section.

14. The device according to claim 12 or 13, characterized in that The first valve block further includes: a main control valve and a shut-off valve connected between the other end of the first control valve and the third interface.

15. The device according to claim 12 or 13, characterized in that The device also includes a second valve block, which includes a fourth interface, a fifth interface, and a main control valve and a shut-off valve connected between the fourth interface and the fifth interface. The fourth interface is used to connect to the third interface, and the fifth interface is used to connect to the liquid reservoir.

16. The device according to any one of claims 12 to 15, characterized in that The first valve block also includes: the second control valve, a sixth interface and a seventh interface connected to one end of the second control valve, the sixth interface is used to connect to the second brake line, the seventh interface is used to connect to the second pressure sensor, and the other end of the second control valve is connected to the third interface.

17. A braking system testing method, characterized in that: Applied to a brake system testing device, the brake system includes a reservoir and a first brake line, the device includes a valve assembly, the valve assembly includes at least one branch control valve, one end of a first control valve of the at least one branch control valve is connected to the first brake line, and the other end of the first control valve is connected to the reservoir; the method includes: When testing the first brake line, controlling the first control valve to be conductive, so as to connect the first brake line and the fluid reservoir; acquiring first pressure information of the first brake line; When the first brake line test is completed, the first control valve is controlled to be closed to cut off the connection between the first brake line and the reservoir.

18. The method according to claim 17, characterized in that The device further includes a main line control valve connected between the at least one branch line control valve and the liquid reservoir, and the method further includes: When a control valve in the at least one branch control valve is turned on, the main control valve is controlled to be turned on, so as to connect the at least one branch control valve and the liquid reservoir.

19. The method according to claim 18, characterized in that The method further comprises: When a first instruction is received or a first event is detected, the power supply to the main control valve is cut off.

20. The method according to any one of claims 17 to 19, characterized in that: The valve assembly further includes a shut-off valve connected between the at least one branch control valve and the liquid reservoir, and the method further includes: When the device is in a test state, opening the stop valve; When the device is in a non-test state, the stop valve is closed.

21. The method according to any one of claims 17 to 20, characterized in that: The brake system further includes a second brake line, one end of a second control valve of the at least one branch control valve is connected to the second brake line, and the other end of the second control valve is connected to the reservoir, and the method further includes: When testing the second brake line, controlling the second control valve to be conductive, so as to connect the second brake line and the reservoir; acquiring second pressure information of the second brake line; When the second brake line test is completed, the second control valve is controlled to be closed to cut off the connection between the second brake line and the reservoir.

22. The method according to any one of claims 17 to 21, characterized in that The method further comprises: A test instruction is received, and at least one valve in the valve set is controlled to be turned on or off according to the test instruction.

23. The method according to claim 22, characterized in that The method further comprises: Send the test instruction.

24. A braking system testing device, characterized in that: The brake system includes a fluid reservoir and a first brake line. The device includes a valve assembly, the valve assembly includes at least one branch control valve, one end of a first control valve of the at least one branch control valve is connected to the first brake line, and the other end of the first control valve is connected to the fluid reservoir. The device further includes: a first control unit, configured to control the first control valve to be conductive when testing the first brake line, so as to connect the first brake line and the fluid reservoir; a first measuring unit, configured to obtain pressure information of the first brake line to obtain first pressure information; The first control unit is further configured to control the first control valve to close when the first brake line test is completed, so as to cut off the connection between the first brake line and the fluid reservoir.

25. The device according to claim 24, characterized in that The device further includes a main line control valve connected between the at least one branch line control valve and the liquid reservoir, and the device further includes: The second control unit is configured to control the main control valve to be turned on when a control valve in the at least one branch control valve is turned on, so as to turn on the at least one branch control valve and the liquid reservoir.

26. The device according to claim 25, characterized in that The device further comprises: The switch unit is used to cut off the power supply to the main control valve when a first instruction is received or a first event is detected.

27. The device according to any one of claims 24 to 26, characterized in that The valve assembly further includes a cutoff unit connected between the at least one branch control valve and the liquid reservoir; The cutoff unit is configured to be turned on when the device is in a test state, and turned off when the device is in a non-test state.

28. The device according to any one of claims 24 to 27, characterized in that The brake system further includes a second brake line, one end of a second control valve of the at least one branch control valve is connected to the second brake line, and the other end of the second control valve is connected to the reservoir, and the device further includes: a third control unit, configured to control the second control valve to be conductive when testing the second brake line, so as to connect the second brake line and the fluid reservoir; a second measuring unit, configured to obtain second pressure information of the second brake line; The third control unit is further configured to control the second control valve to close when the second brake line test is completed, so as to cut off the connection between the second brake line and the fluid reservoir.

29. The device according to any one of claims 24 to 28, characterized in that The device further comprises: The receiving unit is used to receive a test instruction, where the test instruction is used to instruct the turning on or off of at least one valve in the valve set.

30. The device according to claim 29, characterized in that The device further comprises: A sending unit is used to send the test instruction.

31. A vehicle-mounted device, characterized in that: The vehicle-mounted device includes: a brake system testing device according to any one of claims 1 to 16, or a brake system testing device according to any one of claims 24 to 30.

32. A vehicle, characterized in that: The vehicle comprises: a braking system, and a braking system testing device according to any one of claims 1 to 16, or a braking system testing device according to any one of claims 24 to 30.

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