Vehicle braking system and vehicle

Abstract

The invention relates to the technical field of vehicles, in particular to a vehicle braking system and a vehicle. The vehicle braking system comprises a braking unit, an isolation assembly and two braking assemblies, and the two braking assemblies are correspondingly arranged on two bogies of a vehicle. The brake unit is provided with a liquid outlet pipe, the liquid outlet pipe communicates with the two brake assemblies, and the brake unit outputs brake liquid through the liquid outlet pipe. The isolation assembly comprises 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 brake assemblies and the liquid outlet pipe; and one of the first isolation valve and the second isolation valve is closed, and the liquid outlet pipe conveys brake liquid to the corresponding brake assembly through the other one of the first isolation valve and the second isolation valve, so that the corresponding brake assembly brakes the corresponding bogie. According to the vehicle braking system and the vehicle, the leakage position can be isolated, independent braking control is conducted on the bogie at the non-leakage position, and the reliability is improved.

Description

Technical Field

[0001] The present application relates to the field of vehicle technology, 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. Usually, each carriage of a rail vehicle has a front bogie and a rear bogie. In order to provide braking force when the two bogies need to brake, a hydraulic brake system is generally provided.

[0003] In the prior art, the hydraulic brake system includes a hydraulic power unit and two sets of calipers. The two sets of calipers are respectively arranged on the front bogie and the rear bogie. Both sets of calipers are 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 somewhere in the hydraulic brake system, both bogies lose hydraulic braking force, resulting in poor reliability. Summary of the invention

[0005] The present application provides a vehicle braking system and a vehicle, which can isolate the leakage point and perform independent braking control on the bogie at the non-leaking point, thereby improving reliability.

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

[0007] The brake unit is provided with a liquid outlet pipe, which is connected with two brake components, and the brake unit outputs brake fluid through the liquid outlet pipe.

[0008] The isolation assembly includes a first isolation valve and a second isolation valve, wherein the first isolation valve and the second isolation valve are respectively arranged between two brake assemblies and a liquid outlet pipe; when one of the first isolation valve and the second isolation valve is closed, the liquid outlet pipe transports brake fluid to the corresponding brake assembly through the other of the first isolation valve and the second isolation valve, so that the corresponding brake assembly brakes the corresponding bogie.

[0009] In one possible implementation, the vehicle braking system provided in the present application further includes a connecting assembly, the connecting assembly including a first connecting pipe and a second connecting pipe, one of the two brake assemblies is connected to the first isolation valve through the first connecting pipe, and the other of the two brake assemblies is connected to the second isolation valve through the second connecting pipe.

[0010] In a possible implementation, the vehicle braking system provided in the present application further includes two first detection members, which are respectively disposed on the first connecting pipe and the second connecting pipe to respectively detect the pressure of the first connecting pipe and the second connecting pipe.

[0011] When the pressures of the first connecting pipe and the second connecting pipe are both lower than the preset pressure, the first isolation valve is closed, the outlet pipe delivers brake fluid to the second connecting pipe through the second isolation valve, and the pressure of the second connecting pipe is detected.

[0012] When the detected pressure of the second connecting pipe is greater than or equal to the preset pressure, the first isolation valve is kept closed; when the detected pressure of the second connecting pipe is less than the preset pressure, the first isolation valve is opened and the second isolation valve is closed, so that the outlet pipe transports brake fluid to the first connecting pipe through the first isolation valve and the pressure of the first connecting pipe is detected.

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

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

[0015] In a possible implementation, the vehicle braking system provided in the present application further includes a control component, and 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 first isolation valve or the second isolation valve to open or close.

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

[0017] The third detection member is arranged on the vehicle, and is used for detecting the braking deceleration of the vehicle.

[0018] The second detection member and the third detection member are both electrically connected to the control member, which controls the first detection member to detect the pressure of the first connecting pipe and the second connecting pipe 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.

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

[0020] In a possible implementation, the vehicle braking system provided by the present 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, the vehicle braking system provided in the present application has two brake calipers located on the same bogie, and the two brake calipers are respectively arranged on opposite sides of the bogie.

[0022] In a second aspect, the present application also provides a vehicle, comprising a vehicle body and any one of the vehicle braking systems provided in the first aspect above, arranged on the vehicle body.

[0023] The vehicle braking system and vehicle provided by the present application, the vehicle braking system, by setting a braking unit, an isolation assembly and two braking assemblies, the two braking assemblies are correspondingly arranged on the two bogies of the vehicle. The braking unit is provided with a liquid outlet pipe, the liquid outlet pipe is connected to the two braking assemblies, and the braking unit outputs brake 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 a leak occurs somewhere after the first isolation valve or the second isolation valve, the corresponding first isolation valve or the second isolation valve is closed to isolate the leaking part, and the liquid outlet pipe transports the brake fluid to the corresponding braking assembly through the other of the first isolation valve and the second isolation valve, so that the corresponding braking assembly brakes the corresponding bogie, thereby independently braking the bogie at the non-leaking part, thereby improving reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0025] Figure 1 A schematic diagram of the structure of a vehicle braking system provided in an embodiment of the present application;

[0026] Figure 2 for Figure 1 Structural schematic diagram of closing the first isolation valve.

[0027] Description of reference numerals:

[0028] 100-brake assembly; 110-brake caliper;

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

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

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

[0032] 500-first test piece;

[0033] 600-control parts;

[0034] 700-Second test piece.

[0035] The above drawings have shown clear embodiments of the present application, which will be described in more detail later. These drawings and text descriptions are not intended to limit the scope 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 DESCRIPTION

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

[0037] Secondly, it should be noted that in the description of this application, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, or it can be an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0038] Then, it should be noted that, in the description of the present application, the terms "upper", "lower", "front", "back", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0039] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0040] As shown in the background technology, in the prior art, the hydraulic brake system includes a hydraulic power unit and two sets of calipers. The two sets of calipers are respectively arranged on the front bogie and the rear bogie. Both sets of calipers are connected to the hydraulic power unit. The hydraulic power unit transports 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 connected to the hydraulic power unit, that is, the entire hydraulic braking system is in a connected state, the hydraulic power unit provides brake fluid to the two sets of calipers at the same time. When a leak occurs somewhere in the hydraulic braking system, the hydraulic pressure of the hydraulic braking system is insufficient, and the braking force delivered to the two calipers by the hydraulic power unit is insufficient, resulting in both bogies losing hydraulic braking force and poor reliability.

[0042] Moreover, the two sets of calipers provide brake fluid at the same time through the hydraulic power unit, that is, the existing hydraulic braking system can only brake two bogies at the same time, and cannot hydraulically brake the front bogie or the rear bogie separately. It is not suitable for the situation where only one of the two bogies needs to supplement the 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 the vehicle provided by the present application, the vehicle braking system, by setting a braking unit, an isolation assembly and two braking assemblies, the two braking assemblies are correspondingly arranged on the two bogies of the vehicle. The braking unit is provided with a liquid outlet pipe, the liquid outlet pipe is connected to the two braking assemblies, and the braking unit outputs the brake 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 a leak occurs somewhere after the first isolation valve or the second isolation valve, the corresponding first isolation valve or the second isolation valve is closed to isolate the leaking part, and the liquid outlet pipe transports the brake fluid to the corresponding braking assembly through the other of the first isolation valve and the second isolation valve, so that the corresponding braking assembly brakes the corresponding bogie, thereby independently braking the bogie at the non-leaking part, thereby improving reliability.

[0044] In order to make the purpose, technical solutions and advantages of the present application clearer, the technical solutions in the embodiments of the present application will be described in more detail below in conjunction with the drawings in the preferred embodiments of the present application. In the drawings, the same or similar reference numerals throughout represent the same or similar parts or parts with the same or similar functions. The described embodiments are part of the embodiments of the present application, not all of the embodiments. The embodiments described below with reference to the drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limitations on the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present application.

[0045] Reference Figure 1 and Figure 2 As shown, the vehicle braking system provided by the present application includes: a braking unit 200, an isolation assembly 300 and two braking assemblies 100, and the two braking assemblies 100 are correspondingly arranged on two bogies of the vehicle.

[0046] The brake unit 200 has a liquid outlet pipe 210 , which is connected to the two brake assemblies 100 . 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, and 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 transports 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.

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

[0049] It should be noted that the brake unit 200 can store and provide brake fluid. The brake unit 200 delivers the brake fluid to each brake assembly 100 through the outlet pipe 210 to generate the necessary hydraulic pressure and apply sufficient braking force to the bogie. In specific implementation, the brake unit 200 can be arranged at the center of the bottom of the vehicle. A hydraulic pump and a fluid storage tank can be set in the brake unit 200. The fluid storage tank is used to store brake fluid so that the vehicle brake 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 has a liquid outlet pipe 210, which can be a Y-shaped bifurcated pipeline. An isolation assembly 300 is arranged at the node of the bifurcated pipeline. The first isolation valve 310 of the isolation assembly 300 can be connected in series to the first brake assembly 100 on the front bogie, and the second isolation valve 320 can be connected in series to the second brake assembly 100 on the rear bogie. When the first isolation valve 310 and the second isolation valve 320 are both opened, the first brake assembly 100 and the second brake assembly 100 are both connected to the liquid outlet pipe 210, and the brake fluid in the liquid outlet pipe 210 can be transported to the first brake assembly 100 through the first isolation valve 310, and transported to the second brake assembly 100 through the second isolation valve 320. When the first isolation valve 310 is closed, the first brake assembly 100 is disconnected from the liquid outlet pipe 210, and the brake fluid in the liquid outlet pipe 210 is transported to the second brake assembly 100 through the second isolation valve 320, so that the second brake assembly 100 brakes the rear bogie. The second isolation valve 320 is closed to disconnect the second brake assembly 100 from the outlet pipe 210. The brake fluid in the outlet pipe 210 is transported to the first brake assembly 100 through the first isolation valve 310, so that the first brake assembly 100 brakes the front bogie.

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

[0052] When leakage occurs at a certain place after the first isolation valve 310, the first isolation valve 310 is closed, and the outlet pipe 210 transports brake fluid to the second brake assembly 100 through the second isolation valve 320, so that the second brake assembly 100 brakes the rear bogie. When leakage occurs at a certain place after the second isolation valve 320, the second isolation valve 320 is closed, and the outlet pipe 210 transports brake fluid to the first brake assembly 100 through the first isolation valve 310, so that the first brake assembly 100 brakes the front bogie. Therefore, the vehicle braking system provided by the present application can be applied to the situation where leakage occurs at a certain place of the hydraulic brake system. By isolating the leakage place, the bogie at the non-leaking place is independently braked and controlled, thereby improving reliability.

[0053] It should also be noted that when one of the front bogie and the rear bogie is a non-powered bogie and the other is a powered bogie, the vehicle braking process only needs to supplement part of the hydraulic braking force. The vehicle braking system provided by the present application can apply hydraulic braking force to the non-powered bogie alone, and is suitable for rail vehicles with one driving and one trailing bogie. Since only the powered bogie (if the powered bogie is the front bogie) has an electric braking function, during the vehicle braking process, only half of the bogies will have braking force, which may easily lead to insufficient braking force. When this happens, the first isolation valve 310 can be closed, and hydraulic braking can be applied 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, reference Figure 1 As shown, the vehicle braking system also includes a connecting assembly 400, which includes a first connecting pipe 410 and a second connecting pipe 420. One of the two brake assemblies 100 is connected to the first isolation valve 310 through the first connecting pipe 410, and the other of the two brake assemblies 100 is connected to the second isolation valve 320 through the second connecting pipe 420.

[0055] It can be understood that the first connecting pipe 410 and the second connecting pipe 420 are hydraulic channels provided for the two brake assemblies 100 respectively, and the brake fluid in the outlet pipe 210 can be transported to the first brake assembly 100 through the first isolation valve 310 and the first connecting pipe 410 in sequence, and transported to the second brake assembly 100 through the second isolation valve 320 and the second connecting pipe 420 in sequence.

[0056] It should be noted that the first connecting pipe 410 and the second connecting pipe 420 can be made of high pressure resistant and corrosion resistant materials (such as stainless steel or high-strength synthetic materials) to ensure their reliability and durability under various operating conditions. At the interface between the first connecting pipe 410 and the first isolation valve 310 and the brake assembly 100 (or at the interface between the second connecting pipe 420 and the third isolation valve and the brake assembly 100), a reliable sealing structure (such as using a high-quality sealing ring or joint) should be used to prevent brake fluid leakage.

[0057] In some embodiments, reference Figure 1 and Figure 2 As shown, the vehicle braking system further includes two first detection members 500 , which are respectively disposed on the first connecting pipe 410 and the second connecting pipe 420 to detect the pressure of the first connecting pipe 410 and the second connecting pipe 420 .

[0058] When the pressures of the first connecting pipe 410 and the second connecting pipe 420 are both lower than the preset pressure, the first isolation valve 310 is closed, the 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 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 and the second isolation valve 320 is closed, so that the outlet pipe 210 transports 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 is kept closed.

[0061] It should be noted that, since the liquid outlet pipe 210 connects the two brake assemblies 100, the brake unit 200 provides brake fluid to the two groups of brake assemblies 100 through the liquid outlet pipe 210. When a leakage occurs somewhere 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 delivered to the two brake assemblies 100 is insufficient, resulting in the loss of hydraulic braking force on both bogies.

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

[0063] Specifically, when the pressures in the first connecting pipe 410 and the second connecting pipe 420 are both lower than the preset pressure, it indicates that the hydraulic pressure in the vehicle brake system is insufficient, and leakage may have occurred in the first connecting pipe 410, the second connecting pipe 420 or the two brake assemblies 100. The first isolation valve 310 may be closed first, and the outlet pipe 210 may transport brake fluid to the second connecting pipe 420 through the second isolation valve 320, and then the pressure of the second connecting pipe 420 may be detected.

[0064] If the pressure of the second connecting pipe 420 is greater than or equal to the preset pressure, it means that the leakage point has been isolated. Since the first isolation valve disconnects the outlet pipe 210 from the first connecting pipe 410, it means that the leakage point is somewhere after the first isolation valve 310, so the first isolation valve 310 is kept closed. If the pressure of the second connecting pipe 420 is less than the preset pressure, it means that the leakage point has not been isolated, the first isolation valve 310 is opened, the second isolation valve 320 is closed, and the outlet pipe 210 delivers 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 detected pressure of the first connecting pipe 410 is greater than or equal to the preset pressure, it means that the leakage point has been isolated. Since the second isolation valve 320 disconnects the liquid outlet pipe 210 and the second connecting pipe 420, it means that the leakage point is somewhere after the second isolation valve 320, so the second isolation valve 320 is kept closed.

[0066] In some embodiments, reference 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 tiny pressure changes. By using a high-precision pressure sensor as the first detection member 500, it is ensured that the pressure of the first connecting pipe 410 and the second connecting pipe 420 can be detected in real time and accurately.

[0068] In some embodiments, reference Figure 1 As shown, the vehicle braking system further includes a control component 600, and 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.

[0069] The control component 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 component 500 (pressure sensor), thereby realizing automated operation, reducing the need for manual intervention, and improving the response speed and accuracy of the system.

[0070] In some embodiments, reference 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 brake unit 200 , and the second detection member 700 is used to detect the braking force of the brake fluid output by the brake unit 200 .

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

[0072] The second detection member 700 and the third detection member are both 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 brake 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 pressure of the first connecting pipe 410 and the second connecting pipe 420.

[0073] The second detection member 700 is connected to the brake unit 200 and is used to detect the braking force of the brake fluid output by the brake unit 200, which helps monitor the output performance of the brake system and ensures that the brake unit 200 can provide sufficient braking force. The third detection member is set 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, and the braking force output by the brake unit 200 is greater than or equal to the preset braking force, it indicates that the brake system may have a leak, and the control member 600 will instruct the first detection member 500 to detect the pressure of the first connecting pipe 410 and the second connecting pipe 420.

[0075] By real-time monitoring and analysis of various performance indicators of the braking system, the system can promptly identify and respond to potential safety hazards and improve the overall safety of the vehicle.

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

[0077] It should be noted that when the pressure of 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 being over-pressurized and avoid damage to the pipeline or components due to excessive pressure.

[0078] In some embodiments, reference Figure 1 As shown, the brake 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 a strong and stable braking force, improve the braking performance of the vehicle, and shorten the braking distance. By accurately 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, reference Figure 1 As shown, there are two brake calipers 110 located on the same bogie, and the two brake calipers 110 are respectively arranged on two opposite sides of the bogie.

[0082] By arranging the brake calipers 110 on both sides of the same bogie, symmetrical braking force distribution can be achieved so that the vehicle maintains stability and balance during braking.

[0083] The present application also provides a vehicle, comprising 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 are described in detail in the above embodiments, and will not be repeated here.

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

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

[0087] When receiving the leakage detection request from BCU during hydraulic braking, refer to Figure 2 As shown, the BCU controls the first isolation valve 310 to be closed. At this time, the brake fluid output by the brake unit 200 will not be transmitted to the first brake assembly 100, but only to the second brake assembly 100.

[0088] If the pressure of the second connecting pipe 420 is greater than or equal to the preset pressure (at this time, the brake unit 200 no longer continuously outputs brake fluid), it means that the leakage point has been isolated. Since the first isolation valve disconnects the outlet pipe 210 and the first connecting pipe 410, it means that the leakage point is somewhere after the first isolation valve 310, so that the first isolation valve 310 is kept closed, so that the brake fluid is only output to the second connecting pipe 420 and the second brake assembly 100, so that half of the vehicle's bogies still have hydraulic brakes. At this time, the vehicle operates in a degraded manner according to the preset fault mode one.

[0089] If the brake unit 200 continues to operate and output braking force after closing the first isolation valve 310, and the pressure of the second connecting pipe 420 is less than the preset pressure, it means that the leakage point has not been isolated, and the first isolation valve 310 is opened, and the second isolation valve 320 is closed, so that the outlet pipe 210 can deliver 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 tested. Continue to test whether the hydraulic brake unit 200 continues to operate and output braking force. If there is no output, and the pressure of the first connecting pipe 410 is greater than or equal to the preset pressure, it means that the leakage point is somewhere after the second isolation valve 320, so the second isolation valve 320 is kept closed, so that the brake fluid is only output to the first connecting pipe 410 and the first brake assembly 100, ensuring that half of the bogies of the vehicle still have hydraulic brakes. At this time, the vehicle is degraded according to the pre-set fault mode 1 (generally clearing passengers and automatically exiting operation).

[0090] If after closing the second isolation valve 320, the brake unit 200 continues to operate and output the braking force, and the pressure of the first connecting pipe 410 is less than the preset pressure, and the first isolation valve 310 and the second isolation valve 320 are closed, and the brake unit 200 continues to operate and output the braking force, a serious leakage fault of the brake system is reported. At this time, the vehicle is downgraded according to the set fault mode 2 (generally clearing passengers and connecting rescue).

[0091] When the vehicle braking process only needs to supplement part of the hydraulic braking force, the vehicle braking system provided by the present application can apply hydraulic braking force to the non-powered bogie alone, and is suitable for rail vehicles with one driving and one trailing bogie. Specifically, the ECU outputs a braking command for the whole vehicle to confirm the braking demand of the whole vehicle. When both the front and rear bogies need to apply hydraulic braking force, the BCU controls the first isolation valve 310 and the second isolation valve 320 to open to ensure that both the front and rear bogies have hydraulic braking. When the ECU instructs the BCU 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 powered on and closed, and only outputs hydraulic braking force to the non-powered bogie. At this time, the ECU continues to detect the braking deceleration of the whole vehicle, and the process ends when it meets expectations. When the ECU detects that the braking force is insufficient, it applies a full hydraulic braking instruction to the BCU, and the BCU controls the brake unit 200 to apply hydraulic braking to the front and rear bogies normally, and the process ends.

[0092] It can be understood by those skilled in the art that the vehicle braking system and the vehicle provided in the present application, the vehicle braking system, by setting a brake unit 200, an isolation assembly 300 and two brake assemblies 100, the two brake assemblies 100 are correspondingly arranged on the two bogies of the vehicle. The brake unit 200 has a liquid outlet pipe 210, the liquid outlet pipe 210 is connected to the two brake assemblies 100, and the brake 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, 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 leakage occurs somewhere behind 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 to isolate the leakage location, and 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, thereby independently braking the bogie at the non-leaking location and improving reliability.

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

[0094] It should be understood that the various numerical numbers involved in the embodiments of the present application are only used 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 accompanying 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 principles 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 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); 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 invention also comprises a connecting assembly (400), wherein the connecting assembly (400) comprises a first connecting pipe (410) and a second connecting pipe (420), wherein one of the two brake assemblies (100) is connected to the first isolation valve (310) via the first connecting pipe (410), and the other of the two brake assemblies (100) is connected to the second isolation valve (320) via the second connecting pipe (420).

3. The vehicle braking system according to claim 2, characterized in that: It also includes 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, the second isolation valve (320) is kept closed.

4. The vehicle braking system according to claim 3, characterized in that: The first detection component (500) is a pressure sensor.

5. The vehicle braking system according to claim 3, 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.

6. The vehicle braking system according to claim 5, 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.

7. The vehicle braking system according to claim 5, 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.

8. The vehicle braking system according to any one of claims 1 to 7, 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.

9. The vehicle braking system according to claim 8, 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.

10. 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 9 arranged on the vehicle body.

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