Vehicle braking system and vehicle

Abstract

The present application relates to the technical field of vehicles, and in particular to a vehicle braking system and a vehicle. The vehicle braking system includes a braking unit, an isolation assembly, and two braking assemblies, and the two braking assemblies are correspondingly arranged on two bogies of the vehicle. The braking unit is provided with a liquid outlet pipe, and the liquid outlet pipe communicates with the two braking assemblies, and the braking unit outputs braking fluid through the liquid outlet pipe. The isolation assembly includes a first isolation valve and a second isolation valve, and the first isolation valve and the second isolation valve are correspondingly arranged between the two braking assemblies and the liquid outlet pipe; when one of the first isolation valve and the second isolation valve is closed, the liquid outlet pipe delivers braking fluid to the corresponding braking assembly through the other of the first isolation valve and the second isolation valve, so as to brake the corresponding bogie by the corresponding braking assembly. The vehicle braking system and the vehicle of the present application can isolate the leakage point and perform independent braking control on the bogies without leakage, thereby improving the reliability.

Description

Technical Field

[0001] The present application relates to the technical field of vehicles, and in particular, to a vehicle braking system and a vehicle. Background Art

[0002] Rail vehicles include light rails, subways, and certain types of railway vehicles. Generally, each carriage of a rail vehicle has a front bogie and a rear bogie. In order to provide braking force when braking is required for the two bogies, a hydraulic braking system is generally provided.

[0003] In the prior art, the hydraulic braking system includes a hydraulic power unit and two groups of calipers. The two groups of calipers are respectively arranged on the front bogie and the rear bogie. The two groups of calipers are both connected to the hydraulic power unit. The hydraulic power unit delivers brake fluid to the calipers to drive the calipers to brake the bogie.

[0004] However, when a leak occurs at a certain place in the hydraulic braking system, both bogies lose hydraulic braking force, and the reliability is poor. Summary of the Invention

[0005] The present application provides a vehicle braking system and a vehicle, which can isolate the leakage point and independently control the braking of the bogies at the non-leaking places, improving the reliability.

[0006] In a first aspect, the vehicle braking system provided by the present application includes: a braking unit, an isolation component, and two braking components, and the two braking components are correspondingly arranged on the two bogies of the vehicle.

[0007] The braking unit has a liquid outlet pipe, and the liquid outlet pipe communicates with the two braking components. The braking unit outputs brake fluid through the liquid outlet pipe.

[0008] The isolation component includes a first isolation valve and a second isolation valve. The first isolation valve and the second isolation valve are correspondingly arranged between the two braking components and the liquid outlet pipe; when one of the first isolation valve and the second isolation valve is closed, the liquid outlet pipe delivers brake fluid to the corresponding braking component through the other of the first isolation valve and the second isolation valve, so as to enable the corresponding braking component to brake the corresponding bogie.

[0009] In a possible implementation manner, the vehicle braking system provided by the present application further includes a connection component, and the connection component includes a first connection pipe and a second connection pipe. One of the two braking components is communicated with the first isolation valve through the first connection pipe, and the other of the two braking components is communicated with the second isolation valve through the second connection pipe.

[0010] In a possible implementation manner, the vehicle braking system provided by the present application further includes two first detection components, and the two first detection components are respectively arranged on the first connection pipe and the second connection pipe to respectively detect the pressures of the first connection pipe and the second connection pipe.

[0011] When the pressures of the first connecting pipe and the second connecting pipe are both less than the preset pressure, close the first isolation valve, so that the liquid outlet pipe delivers the brake fluid to the second connecting pipe through the second isolation valve, and detect the pressure of the second connecting pipe.

[0012] When the detected pressure of the second connecting pipe is greater than or equal to the preset pressure, keep the first isolation valve closed; when the detected pressure of the second connecting pipe is less than the preset pressure, open the first isolation valve and close the second isolation valve, so that the liquid outlet pipe delivers the brake fluid to the first connecting pipe through the first isolation valve, and detect the pressure of the first connecting pipe.

[0013] When the detected pressure of the first connecting pipe is greater than or equal to the preset pressure, keep the second isolation valve closed.

[0014] In a possible implementation, for the vehicle braking system provided by this application, the first detection component is a pressure sensor.

[0015] In a possible implementation, for the vehicle braking system provided by this application, it further includes a control component. The first isolation valve, the second isolation valve and the first detection component are all electrically connected to the control component, and the control component controls the opening or closing of the first isolation valve or the second isolation valve.

[0016] In a possible implementation, for the vehicle braking system provided by this application, it further includes a second detection component and a third detection component. The second detection component is connected to the braking unit, and the second detection component is used to detect the braking force of the brake fluid output by the braking unit.

[0017] The third detection component is arranged on the vehicle, and the third detection component is used to detect the braking deceleration of the vehicle.

[0018] Both the second detection component and the third detection component are electrically connected to the control component. When the braking deceleration of the vehicle is less than the preset deceleration and the braking force output by the braking unit is greater than or equal to the preset braking force, the control component controls the first detection component to detect the pressures of the first connecting pipe and the second connecting pipe.

[0019] In a possible implementation, for the vehicle braking system provided by this application, the braking unit is electrically connected to the control component. When the pressure of the first connecting pipe or the second connecting pipe is greater than or equal to the preset pressure, the control component controls the braking unit to stop outputting the brake fluid.

[0020] In a possible implementation, for the vehicle braking system provided by this application, the braking assembly includes at least one brake caliper, and the brake caliper is used to brake the corresponding bogie.

[0021] In a possible implementation, for the vehicle braking system provided by this application, the number of brake calipers on the same bogie is two, and the two brake calipers are respectively arranged on opposite sides of the bogie.

[0022] In a second aspect, the present application further provides a vehicle, including a vehicle body and the vehicle braking system provided in any one of the above first aspects provided on the vehicle body.

[0023] The vehicle braking system and the vehicle provided by the present application, the vehicle braking system, by providing a braking unit, an isolation component and two braking components, the two braking components are correspondingly arranged on two bogies of the vehicle. The braking unit has a liquid outlet pipe, and the liquid outlet pipe communicates with the two braking components, and the braking unit outputs braking fluid through the liquid outlet pipe. The isolation component includes a first isolation valve and a second isolation valve, and the first isolation valve and the second isolation valve are correspondingly arranged between the two braking components and the liquid outlet pipe. When a leak occurs at a certain place after the first isolation valve or the second isolation valve, the corresponding first isolation valve or the second isolation valve is closed, and the leak can be isolated, and the liquid outlet pipe delivers braking fluid to the corresponding braking component through the other of the first isolation valve and the second isolation valve, so that the corresponding braking component brakes the corresponding bogie, thereby independently braking and controlling the bogie at the non-leaking place, improving the reliability. Description of the Drawings

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0025] Figure 1 It is a schematic structural diagram of the vehicle braking system provided by the embodiment of the present application;

[0026] Figure 2 is Figure 1 A schematic structural diagram of closing the first isolation valve.

[0027] Description of the reference numerals:

[0028] 100 - braking component; 110 - brake caliper;

[0029] 200 - braking unit; 210 - liquid outlet pipe;

[0030] 300 - isolation component; 310 - first isolation valve; 320 - second isolation valve;

[0031] 400 - connection component; 410 - first connection pipe; 420 - second connection pipe;

[0032] 500 - first detection component;

[0033] 600 - control component;

[0034] 700 - Second detection part.

[0035] Through the above - mentioned drawings, specific embodiments of the present application have been shown, and there will be a more detailed description hereinafter. These drawings and textual descriptions are not intended to limit the scope of the concept of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. Detailed implementation manners

[0036] First of all, those skilled in the art should understand that these implementation manners are only used to explain the technical principles of the present application and are not intended to limit the protection scope of the present application. Those skilled in the art can make adjustments according to needs to adapt to specific application scenarios.

[0037] Secondly, it should be noted that in the description of the present application, unless otherwise clearly specified and defined, the terms "installed", "connected", and "coupled" should be understood in a broad sense. For example, it can be a fixed connection, or an indirect connection through an intermediate medium, or the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above - mentioned terms in the present application can be understood according to specific situations.

[0038] Then, it should also be noted that in the description of the present application, the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present application.

[0039] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, unless otherwise stated, the meaning of "a plurality" is two or more.

[0040] As shown in the background art, in the prior art, the hydraulic braking system includes a hydraulic power unit and two groups of calipers. The two groups of calipers are respectively arranged on the front bogie and the rear bogie. Both groups of calipers are connected to the hydraulic power unit, and the hydraulic power unit delivers brake fluid to the calipers to drive the calipers to brake the bogie.

[0041] Since the calipers on the front bogie and the rear bogie are both connected to the hydraulic power unit, that is, the entire hydraulic braking system is in a connected state, and the hydraulic power unit supplies brake fluid to the two calipers simultaneously. When a leak occurs at a certain point in the hydraulic braking system, the hydraulic pressure of the hydraulic braking system is insufficient, and the braking force delivered by the hydraulic power unit to the two calipers is insufficient, resulting in the loss of hydraulic braking force for both bogies and poor reliability.

[0042] Moreover, the two calipers are supplied with brake fluid simultaneously through the hydraulic power unit, that is, the existing hydraulic braking system can only brake the two bogies simultaneously and cannot perform hydraulic braking on the front bogie or the rear bogie alone, and it cannot be applied to the situation where only one of the two bogies needs to supplement hydraulic braking force during the vehicle braking process. It has a single function and poor applicability.

[0043] Based on this, the vehicle braking system and vehicle provided in this application, the vehicle braking system, by setting a braking unit, an isolation component, and two braking components, the two braking components are correspondingly arranged on the two bogies of the vehicle. The braking unit is provided with an outlet pipe, and the outlet pipe communicates with the two braking components, and the braking unit outputs brake fluid through the outlet pipe. The isolation component includes a first isolation valve and a second isolation valve, and the first isolation valve and the second isolation valve are correspondingly arranged between the two braking components and the outlet pipe. When a leak occurs at a certain point after the first isolation valve or the second isolation valve, the corresponding first isolation valve or second isolation valve is closed, and the leak can be isolated. The outlet pipe delivers brake fluid to the corresponding braking component through the other one of the first isolation valve and the second isolation valve, so that the corresponding braking component brakes the corresponding bogie, thereby independently braking and controlling the bogie at the non-leaking part and improving the reliability.

[0044] To make the purpose, technical solution, and advantages of this application clearer, the technical solutions in the preferred embodiments of this application will be described in more detail below with reference to the accompanying drawings in the preferred embodiments of this application. In the drawings, the same or similar reference numerals represent the same or similar components or components with the same or similar functions from beginning to end. The described embodiments are part of the embodiments of this application, not all of the embodiments. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain this application and should not be construed as a limitation of this application. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of this application.

[0045] Refer to Figure 1 and Figure 2 As shown, the vehicle braking system provided in this application includes: a braking unit 200, an isolation component 300, and two braking components 100, and the two braking components 100 are correspondingly arranged on the two bogies of the vehicle.

[0046] The brake unit 200 is provided with a liquid outlet pipe 210. The liquid outlet pipe 210 communicates with two brake assemblies 100, and the brake unit 200 outputs brake fluid through the liquid outlet pipe 210.

[0047] The isolation assembly 300 includes a first isolation valve 310 and a second isolation valve 320. The first isolation valve 310 and the second isolation valve 320 are correspondingly arranged between the two brake assemblies 100 and the liquid outlet pipe 210. When one of the first isolation valve 310 and the second isolation valve 320 is closed, the liquid outlet pipe 210 delivers brake fluid to the corresponding brake assembly 100 through the other one of the first isolation valve 310 and the second isolation valve 320, so as to brake the corresponding bogie by the corresponding brake assembly 100.

[0048] The two brake assemblies 100 are correspondingly arranged on two bogies of the vehicle. In a specific implementation, the first brake assembly 100 can be installed at the brake disc installation position of the front bogie, and the second brake assembly 100 can be installed at the brake disc installation position of the rear bogie.

[0049] It should be noted that the brake unit 200 can store and supply brake fluid. The brake unit 200 delivers the brake fluid to each brake assembly 100 through the liquid outlet pipe 210 to generate necessary hydraulic pressure and apply sufficient braking force to the bogie. In a specific implementation, the brake unit 200 can be arranged at the central position at the bottom of the vehicle. A hydraulic pump and a liquid storage tank can be arranged in the brake unit 200. The liquid storage tank is used to store brake fluid so that the vehicle braking system has sufficient brake fluid supply under various operating conditions. The hydraulic pump can convert mechanical energy into hydraulic energy to generate and maintain the hydraulic pressure required by the system.

[0050] The brake unit 200 is provided with a liquid outlet pipe 210. The liquid outlet pipe 210 can adopt a Y-shaped bifurcated pipeline, and an isolation component 300 is arranged at the node of the bifurcated pipeline. The first isolation valve 310 of the isolation component 300 can be connected in series with the first brake component 100 on the front bogie, and the second isolation valve 320 can be connected in series with the second brake component 100 on the rear bogie. When both the first isolation valve 310 and the second isolation valve 320 are opened, both the first brake component 100 and the second brake component 100 are communicated with the liquid outlet pipe 210. The brake fluid in the liquid outlet pipe 210 can be transported to the first brake component 100 through the first isolation valve 310 and to the second brake component 100 through the second isolation valve 320. When the first isolation valve 310 is closed, the connection between the first brake component 100 and the liquid outlet pipe 210 is disconnected, and the brake fluid in the liquid outlet pipe 210 is transported to the second brake component 100 through the second isolation valve 320 to brake the rear bogie with the second brake component 100. When the second isolation valve 320 is closed, the connection between the second brake component 100 and the liquid outlet pipe 210 is disconnected, and the brake fluid in the liquid outlet pipe 210 is transported to the first brake component 100 through the first isolation valve 310 to brake the front bogie with the first brake component 100.

[0051] Exemplarily, the first isolation valve 310 and the second isolation valve 320 can adopt fast-response solenoid valves so that they can be quickly closed or opened when needed. The material of the valves should be resistant to high pressure and corrosion to ensure long-term reliable operation.

[0052] When a leak occurs at a certain place after the first isolation valve 310, the first isolation valve 310 is closed, and the liquid outlet pipe 210 transports the brake fluid to the second brake component 100 through the second isolation valve 320 to brake the rear bogie with the second brake component 100. When a leak occurs at a certain place after the second isolation valve 320, the second isolation valve 320 is closed, and the liquid outlet pipe 210 transports the brake fluid to the first brake component 100 through the first isolation valve 310 to brake the front bogie with the first brake component 100. Thus, the vehicle braking system provided by the present application can be applicable to the situation where a leak occurs at a certain place in the hydraulic braking system. By isolating the leak location and performing independent braking control on the bogies without leaks, the reliability is improved.

[0053] It should also be noted that when one of the current bogie and the rear bogie is a non-powered bogie and the other is a powered bogie, only partial hydraulic braking force needs to be supplemented during the vehicle braking process. The vehicle braking system provided by the present application can apply hydraulic braking force to the non-powered bogie alone, and is applicable to rail vehicles with a powered and a non-powered bogie configuration. Since only the powered bogie (if the powered bogie is the front bogie) has an electric braking function, during the vehicle braking process, there will be a situation where only half of the bogies have braking force, which is likely to result in insufficient braking force. In this case, the first isolation valve 310 can be closed to apply hydraulic braking to the non-powered bogie (if the non-powered bogie is the rear bogie) alone to supplement the insufficient electric braking force of the whole vehicle.

[0054] In some embodiments, referring to Figure 1 as shown, the vehicle braking system further includes a connection assembly 400. The connection assembly 400 includes a first connection pipe 410 and a second connection pipe 420. One of the two braking assemblies 100 is communicated with the first isolation valve 310 through the first connection pipe 410, and the other of the two braking assemblies 100 is communicated with the second isolation valve 320 through the second connection pipe 420.

[0055] It can be understood that the first connection pipe 410 and the second connection pipe 420 respectively provide hydraulic channels for the two braking assemblies 100. The brake fluid in the liquid outlet pipe 210 can be sequentially transported to the first braking assembly 100 through the first isolation valve 310 and the first connection pipe 410, and sequentially transported to the second braking assembly 100 through the second isolation valve 320 and the second connection pipe 420.

[0056] It should be noted that the first connection pipe 410 and the second connection pipe 420 can be made of materials with high pressure resistance and corrosion resistance (such as stainless steel or high-strength synthetic materials) to ensure their reliability and durability under various operating conditions. At the interfaces of the first connection pipe 410 with the first isolation valve 310 and the braking assembly 100 (or at the interfaces of the second connection pipe 420 with the second isolation valve and the braking assembly 100), a reliable sealing structure (such as using high-quality sealing rings or joints) should be adopted to prevent brake fluid leakage.

[0057] In some embodiments, referring to Figure 1 and Figure 2 as shown, the vehicle braking system further includes two first detection components 500. The two first detection components 500 are respectively arranged on the first connection pipe 410 and the second connection pipe 420 to respectively detect the pressures of the first connection pipe 410 and the second connection pipe 420.

[0058] When the pressures in both the first connecting pipe 410 and the second connecting pipe 420 are less than the preset pressure, the first isolation valve 310 is closed, so that the liquid outlet pipe 210 delivers the brake fluid to the second connecting pipe 420 through the second isolation valve 320, and the pressure of the second connecting pipe 420 is detected.

[0059] When the detected pressure of the second connecting pipe 420 is greater than or equal to the preset pressure, the first isolation valve 310 remains closed; when the detected pressure of the second connecting pipe 420 is less than the preset pressure, the first isolation valve 310 is opened, and the second isolation valve 320 is closed, so that the liquid outlet pipe 210 delivers the brake fluid to the first connecting pipe 410 through the first isolation valve 310, and the pressure of the first connecting pipe 410 is detected.

[0060] When the detected pressure of the first connecting pipe 410 is greater than or equal to the preset pressure, the second isolation valve 320 remains closed.

[0061] It should be noted that since the liquid outlet pipe 210 communicates with two braking components 100, and the braking unit 200 provides brake fluid for the two braking components 100 through the liquid outlet pipe 210, when a leak occurs at a certain place after the first isolation valve 310 or the second isolation valve 320, the hydraulic pressure in the vehicle braking system is insufficient, and the braking force transmitted to the two braking components 100 is insufficient, resulting in the loss of hydraulic braking force for both bogies.

[0062] By providing the first detecting member 500, the first detecting member 500 can detect the pressures of the first connecting pipe 410 and the second connecting pipe 420 in real time, so that the system can timely identify and respond to the situation of insufficient pressure, and prevent braking failure caused by insufficient pressure.

[0063] Specifically, when the pressures in both the first connecting pipe 410 and the second connecting pipe 420 are less than the preset pressure, it indicates that the hydraulic pressure in the vehicle braking system is insufficient, and a leak may occur in the first connecting pipe 410, the second connecting pipe 420 or the two braking components 100. The first isolation valve 310 can be closed first, so that the liquid outlet pipe 210 delivers the brake fluid to the second connecting pipe 420 through the second isolation valve 320, and then the pressure of the second connecting pipe 420 is detected.

[0064] If the detected pressure of the second connecting pipe 420 is greater than or equal to the preset pressure, it indicates that the leak point has been isolated. Since the first isolation valve disconnects the liquid outlet pipe 210 from the first connecting pipe 410, it indicates that the leak point is at a certain place after the first isolation valve 310, so the first isolation valve 310 remains closed. If the detected pressure of the second connecting pipe 420 is less than the preset pressure, it indicates that the leak point has not been isolated. The first isolation valve 310 is opened, and the second isolation valve 320 is closed, so that the liquid outlet pipe 210 delivers the brake fluid to the first connecting pipe 410 through the first isolation valve 310, and then the pressure of the first connecting pipe 410 is detected.

[0065] If the pressure of the detected first connecting pipe 410 is greater than or equal to the preset pressure, it indicates that the leakage point has been isolated. Since the second isolation valve 320 disconnects the liquid outlet pipe 210 from the second connecting pipe 420, it means that the leakage point is at a certain place after the second isolation valve 320. Thus, the second isolation valve 320 is kept closed.

[0066] In some embodiments, referring to Figure 1 as shown, the first detection member 500 is a pressure sensor.

[0067] It should be noted that the pressure sensor has high precision and high sensitivity and can detect minute pressure changes. By using a high-precision pressure sensor as the first detection member 500, it is ensured that the pressures of the first connecting pipe 410 and the second connecting pipe 420 can be detected in real time and accurately.

[0068] In some embodiments, referring to Figure 1 as shown, the vehicle braking system further includes a control member 600. The first isolation valve 310, the second isolation valve 320, and the first detection member 500 are all electrically connected to the control member 600, and the control member 600 controls the opening or closing of the first isolation valve 310 or the second isolation valve 320.

[0069] The control member 600 can automatically adjust the states of the first isolation valve 310 and the second isolation valve 320 according to the real-time data from the first detection member 500 (pressure sensor), realizing automated operation, reducing the need for manual intervention, and improving the response speed and accuracy of the system.

[0070] In some embodiments, referring to Figure 1 as shown, the vehicle braking system further includes a second detection member 700 and a third detection member. The second detection member 700 is connected to the braking unit 200, and the second detection member 700 is used to detect the braking force of the brake fluid output by the braking unit 200.

[0071] The third detection member is arranged on the vehicle, and the third detection member is used to detect the braking deceleration of the vehicle.

[0072] Both the second detection member 700 and the third detection member are electrically connected to the control member 600. When the braking deceleration of the vehicle is less than the preset deceleration and the braking force output by the braking unit 200 is greater than or equal to the preset braking force, the control member 600 controls the first detection member 500 to detect the pressures of the first connecting pipe 410 and the second connecting pipe 420.

[0073] The second detection member 700 is connected to the braking unit 200 and is used to detect the braking force of the brake fluid output by the braking unit 200, which helps to monitor the output performance of the braking system and ensure that the braking unit 200 can provide sufficient braking force. The third detection member is arranged on the vehicle and is used to detect the braking deceleration of the vehicle, which can help evaluate the actual deceleration effect of the vehicle during braking and compare it with the expected braking performance.

[0074] The control member 600 is electrically connected to the second detection member 700 and the third detection member, and can comprehensively analyze the data from the second detection member 700 and the third detection member. When the braking deceleration of the vehicle is less than the preset deceleration, while the braking force output by the braking unit 200 is greater than or equal to the preset braking force, it indicates that there may be a leakage in the braking system, and the control member 600 will instruct the first detection member 500 to detect the pressures of the first connecting pipe 410 and the second connecting pipe 420.

[0075] By monitoring and analyzing various performance indicators of the braking system in real time, the system can identify and respond to potential safety hazards in a timely manner, improving the overall safety of the vehicle.

[0076] In some embodiments, referring to Figure 1 As shown, the braking unit 200 is electrically connected to the control member 600. When the pressure in the first connecting pipe 410 or the second connecting pipe 420 is greater than or equal to the preset pressure, the control member 600 controls the braking unit 200 to stop outputting brake fluid.

[0077] It should be noted that when the pressure in the first connecting pipe 410 or the second connecting pipe 420 reaches or exceeds the preset pressure, stopping the output of the brake fluid can prevent the system from overpressure and avoid damage to the pipelines or components caused by excessive pressure.

[0078] In some embodiments, referring to Figure 1 As shown, the braking assembly 100 includes at least one brake caliper 110, and the brake caliper 110 is used to brake the corresponding bogie.

[0079] The brake caliper 110 can provide strong and stable braking force, improve the braking performance of the vehicle, and shorten the braking distance. By precisely controlling the braking force, the brake caliper 110 can effectively prevent the wheels from locking, reduce the risk of skidding, and improve driving safety.

[0080] It should be noted that the brake caliper 110 can be made of high-strength aluminum alloy or cast iron to ensure its stability and durability under high-temperature and high-pressure conditions.

[0081] In some embodiments, referring to Figure 1 As shown, the number of brake calipers 110 on the same bogie is two, and the two brake calipers 110 are respectively arranged on opposite sides of the bogie.

[0082] Brake calipers 110 are respectively arranged on both sides of the same bogie, which can achieve a symmetrical braking force distribution, so that the vehicle can maintain stability and balance during braking.

[0083] This application also provides a vehicle, including a vehicle body and a vehicle braking system arranged on the vehicle body.

[0084] Among them, the specific structure and working mode of the vehicle braking system have been described in detail in the above embodiments, and will not be elaborated here one by one.

[0085] It should be noted that the control member 600 and the third detection member can be integrated into a vehicle controller (Electronic Control Unit, ECU). The vehicle braking system also includes a brake control unit (Brake Control Unit, BCU), and the second detection member 700 can be integrated on the BCU. The ECU is used to control the operation of the whole vehicle, can output the braking demand of the whole vehicle, and feedback the implementation effect of the whole vehicle braking. The BCU controls the braking unit 200 to output a braking force according to the braking demand of the ECU, providing a power source for the braking system.

[0086] The process of braking system leakage detection is as follows: the ECU outputs a vehicle braking instruction, and the BCU controls the braking unit 200 to output a braking force according to the demand of the ECU. When hydraulic braking needs to be output, if the ECU detects that the braking deceleration of the vehicle at this time is less than the preset deceleration, and at the same time the BCU detects that the braking force of the brake fluid output by the braking unit 200 is greater than or equal to the preset braking force, while the pressures of the two first detection members 500 are less than the preset pressure, it is determined that there is a leakage fault in the braking system. The BCU reports the braking system leakage fault and performs the braking system leakage detection. It should be noted that if the ECU detects that the braking deceleration of the vehicle at this time is less than the preset deceleration, and at the same time the BCU detects that the braking force output by the braking unit 200 is less than the preset braking force, and the pressures of the first connecting pipe 410 and the second connecting pipe 420 are greater than or equal to the preset pressure, the braking demand output by the ECU is unreasonable and the vehicle braking instruction needs to be adjusted.

[0087] When the leakage detection demand of the BCU is received during the hydraulic braking process, refer to Figure 2 As shown, the BCU controls the first isolation valve 310 to close. At this time, the brake fluid output by the braking unit 200 will not be transmitted to the first braking component 100, but only to the second braking component 100.

[0088] If the pressure in the second connecting pipe 420 is greater than or equal to the preset pressure (at this time, the braking unit 200 no longer continuously outputs brake fluid), it indicates that the leakage point has been isolated. Since the first isolation valve disconnects the liquid outlet pipe 210 from the first connecting pipe 410, it shows that the leakage point is somewhere after the first isolation valve 310. Thus, keep the first isolation valve 310 closed, so that the brake fluid is only output to the second connecting pipe 420 and the second braking component 100, enabling the hydraulic braking of half of the bogies of the vehicle. At this time, the vehicle operates in a degraded mode according to the pre-set fault mode one.

[0089] If, after closing the first isolation valve 310, the braking unit 200 still continuously operates to output braking force and the pressure in the second connecting pipe 420 is less than the preset pressure, it indicates that the leakage point has not been isolated. Open the first isolation valve 310 and close the second isolation valve 320, so that the liquid outlet pipe 210 delivers brake fluid to the first connecting pipe 410 through the first isolation valve 310, and then detect the pressure in the first connecting pipe 410. Continue to detect whether the hydraulic braking unit 200 still continuously operates to output braking force. If there is no output and the pressure in the first connecting pipe 410 is greater than or equal to the preset pressure, it indicates that the leakage point is somewhere after the second isolation valve 320. Thus, keep the second isolation valve 320 closed, so that the brake fluid is only output to the first connecting pipe 410 and the first braking component 100, ensuring the hydraulic braking of half of the bogies of the vehicle. At this time, the vehicle operates in a degraded mode according to the pre-set fault mode one (usually for alighting passengers and automatically exiting service).

[0090] If, after closing the second isolation valve 320, the braking unit 200 still continuously operates to output braking force and the pressure in the first connecting pipe 410 is less than the preset pressure, close the first isolation valve 310 and the second isolation valve 320. If the braking unit 200 still continuously operates to output braking force, then report a serious fault of brake system leakage. At this time, the vehicle operates in a degraded mode according to the set fault mode two (usually for alighting passengers and coupling for rescue).

[0091] When only partial hydraulic braking force needs to be supplemented during the vehicle braking process, the vehicle braking system provided by the present application can apply hydraulic braking force to the non-powered bogie alone, and is applicable to rail vehicles with a one-powered and one-trailed bogie. Specifically, the ECU outputs a vehicle braking command to confirm the braking demand of the vehicle. When hydraulic braking force needs to be applied to both the front and rear bogies, the BCU controls both the first isolation valve 310 and the second isolation valve 320 to open, ensuring that there is hydraulic braking for both the front and rear bogies. When the command from the ECU to the BCU is to apply hydraulic braking only to the non-powered bogie (if it is the rear bogie), the BCU controls the first isolation valve 310 to be energized and closed, and only outputs hydraulic braking force to the non-powered bogie. At this time, the ECU continues to detect the vehicle braking deceleration, and the process ends when the expected value is met. When the ECU detects insufficient braking force, it sends a full application command for hydraulic braking to the BCU, and the BCU controls the braking unit 200 to normally apply hydraulic braking to both the front and rear bogies, and the process ends.

[0092] Those skilled in the art can understand that for the vehicle braking system and vehicle provided by the present application, the vehicle braking system is provided with a braking unit 200, an isolation assembly 300, and two braking assemblies 100, and the two braking assemblies 100 are correspondingly arranged on the two bogies of the vehicle. The braking unit 200 is provided with a liquid outlet pipe 210, and the liquid outlet pipe 210 communicates with the two braking assemblies 100. The braking unit 200 outputs brake fluid through the liquid outlet pipe 210. The isolation assembly 300 includes a first isolation valve 310 and a second isolation valve 320, and the first isolation valve 310 and the second isolation valve 320 are correspondingly arranged between the two braking assemblies 100 and the liquid outlet pipe 210. When a leak occurs at a certain place after the first isolation valve 310 or the second isolation valve 320, the corresponding first isolation valve 310 or the second isolation valve 320 is closed, and the leak can be isolated. The liquid outlet pipe 210 delivers brake fluid to the corresponding braking assembly 100 through the other one of the first isolation valve 310 and the second isolation valve 320, so that the corresponding braking assembly 100 brakes the corresponding bogie, thereby independently controlling the braking of the bogie at the non-leaking place and improving the reliability.

[0093] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0094] It should be understood that the various numerical numbers involved in the embodiments of the present application are only for the convenience of description and are not used to limit the scope of the embodiments of the present application.

[0095] So far, the technical solutions of the present application have been described in conjunction with the preferred embodiments shown in the drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present application is obviously not limited to these specific embodiments. Without departing from the principle of the present application, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the protection scope of the present application.

Claims

1. A vehicle braking system, characterized in that: include: Two brake assemblies (100) are correspondingly arranged on two bogies of the vehicle; A brake unit (200), wherein the brake unit (200) is provided with a liquid outlet pipe (210), the liquid outlet pipe (210) being in communication with the two brake assemblies (100), and the brake unit (200) outputs brake fluid through the liquid outlet pipe (210); An isolation assembly (300) comprising a first isolation valve (310) and a second isolation valve (320), wherein the first isolation valve (310) and the second isolation valve (320) are respectively arranged between the two brake assemblies (100) and the liquid outlet pipe (210); a connecting assembly (400), the connecting assembly (400) comprising a first connecting pipe (410) and a second connecting pipe (420), one of the two brake assemblies (100) being connected to the first isolation valve (310) via the first connecting pipe (410), and the other of the two brake assemblies (100) being connected to the second isolation valve (320) via the second connecting pipe (420); Two first detection members (500), the two first detection members (500) being respectively arranged on the first connecting pipe (410) and the second connecting pipe (420) to respectively detect the pressure of the first connecting pipe (410) and the second connecting pipe (420); When the pressures of the first connecting pipe (410) and the second connecting pipe (420) are both lower than a preset pressure, closing the first isolation valve (310), allowing the liquid outlet pipe (210) to transport the brake fluid to the second connecting pipe (420) via the second isolation valve (320), and detecting the pressure of the second connecting pipe (420); When the detected pressure of the second connecting pipe (420) is greater than or equal to a preset pressure, the first isolation valve (310) is kept closed; when the detected pressure of the second connecting pipe (420) is less than the preset pressure, the first isolation valve (310) is opened, the second isolation valve (320) is closed, and the liquid outlet pipe (210) transports the brake fluid to the first connecting pipe (410) through the first isolation valve (310), and the pressure of the first connecting pipe (410) is detected; When the detected pressure of the first connecting pipe (410) is greater than or equal to a preset pressure, keeping the second isolation valve (320) closed; When one of the first isolation valve (310) and the second isolation valve (320) is closed, the liquid outlet pipe (210) transports the brake fluid to the corresponding brake assembly (100) through the other of the first isolation valve (310) and the second isolation valve (320), so that the corresponding brake assembly (100) brakes the corresponding bogie.

2. The vehicle braking system according to claim 1, characterized in that: The first detection component (500) is a pressure sensor.

3. The vehicle braking system according to claim 1, characterized in that: The invention also comprises a control component (600), wherein the first isolation valve (310), the second isolation valve (320) and the first detection component (500) are all electrically connected to the control component (600), and the control component (600) controls the first isolation valve (310) or the second isolation valve (320) to be opened or closed.

4. The vehicle braking system according to claim 3, characterized in that: It also includes a second detection member (700) and a third detection member, the second detection member (700) being connected to the brake unit (200), and the second detection member (700) being used to detect the braking force of the brake fluid output by the brake unit (200); The third detection member is arranged on the vehicle, and is used to detect the braking deceleration of the vehicle; The second detection member (700) and the third detection member are both electrically connected to the control member (600), and the control member (600) controls the first detection member (500) to detect the pressure of the first connecting pipe (410) and the second connecting pipe (420) when the braking deceleration of the vehicle is less than a preset deceleration and the braking force output by the braking unit (200) is greater than or equal to a preset braking force.

5. The vehicle braking system according to claim 3, characterized in that: The brake unit (200) is electrically connected to the control component (600), and the control component (600) controls the brake unit (200) to stop outputting the brake fluid when the pressure of the first connecting pipe (410) or the second connecting pipe (420) is greater than or equal to the preset pressure.

6. The vehicle braking system according to any one of claims 1 to 5, characterized in that: The brake assembly (100) comprises at least one brake caliper (110), and the brake caliper (110) is used to brake the corresponding bogie.

7. The vehicle braking system according to claim 6, characterized in that: The number of brake calipers (110) located on the same bogie is two, and the two brake calipers (110) are respectively arranged on two opposite sides of the bogie.

8. A vehicle, characterized in that: The vehicle brake system comprises a vehicle body and the vehicle brake system according to any one of claims 1 to 7 arranged on the vehicle body.

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