Ebs-based redundant brake device and vehicle

Abstract

The utility model relates to vehicle braking technical field discloses a kind of redundancy brake device and vehicle based on EBS, redundancy brake device based on EBS includes: diaphragm air chamber, air inlet is communicated with first gas source part, gas outlet is communicated with brake part;Redundancy valve, with first gas source part and brake part are communicated with pipeline respectively;Redundancy valve is normally closed valve;Redundancy valve and the pipeline of first gas source part intercommunication are equipped with pressure valve;Pressure valve is normally closed valve;First control unit, with pressure valve electric connection;Second control unit, with redundancy valve electric connection;Second control unit and first control unit are independently set between each other;The redundancy brake device based on EBS provided by the utility model, vehicle encounters extreme situation, or is in extreme environment, when the mechanical function of EBS brake valve fails, the gas of first gas source part can be supplied into brake part along pipeline in turn through pressure valve and redundancy valve, air path directly overcomes diaphragm air chamber, realizes braking.

Description

Technical Field

[0001] This utility model relates to the field of vehicle braking technology, specifically to a redundant braking device and vehicle based on EBS. Background Technology

[0002] EBS (Electronic Braking System) refers to the electronic braking system. The braking device based on EBS refers to the EBS brake valve. The EBS brake valve is the core actuator in the electronic braking system and is mainly used for braking control of commercial vehicles. Its main function is to transmit and amplify the braking signal through a mechanical structure.

[0003] The EBS brake valve is based on the traditional mechanical relay valve, but with the addition of solenoid valves at each air port inside the valve body to achieve electronic control of the relay valve.

[0004] Traditional mechanical relay valves are located within the braking system to amplify the braking signal. Drivers do not need to press the pedal forcefully; a small movement is sufficient to trigger high-pressure braking through the relay valve.

[0005] In related technologies, when the electronic control function of the EBS brake valve fails, such as when the ECU (Electronic Control Unit) malfunctions, the EBS brake valve still retains the function of a mechanical relay valve driven by air pressure. However, when encountering extreme environments (such as high temperature and high pressure, external impact), causing the mechanical function of the EBS brake valve itself to fail, the EBS brake valve will lose both electronic control braking and mechanical braking functions, which can easily lead to serious consequences. Utility Model Content

[0006] In view of this, the present invention provides a redundant braking device based on EBS to solve the problem that when the mechanical function of the EBS brake valve itself fails in extreme environments, the EBS brake valve will lose its braking function, which may easily lead to serious consequences.

[0007] In a first aspect, this utility model provides an EBS-based redundant braking device, disposed between a first air source and a braking unit, comprising: a diaphragm chamber with an inlet connected to the first air source and an outlet connected to the braking unit; a redundant valve connected to both the first air source and the braking unit via pipelines; the redundant valve is a normally closed valve; wherein a pressure valve is provided at the pipeline connecting the redundant valve to the first air source; the pressure valve is a normally closed valve; a first control unit electrically connected to the pressure valve; and a second control unit electrically connected to the redundant valve; the second control unit and the first control unit are independently configured; wherein the EBS-based redundant braking device has a first state and a second state; when the EBS-based redundant braking device is in the first state, gas from the first air source enters the braking unit through the diaphragm chamber; when the EBS-based redundant braking device is in the second state, the second control unit opens the redundant valve and the pressure valve, and gas from the first air source enters the braking unit sequentially through the pressure valve and the redundant valve along the pipeline.

[0008] In an optional embodiment, it further includes a control port adapted to communicate with an external gas source; the redundant valve is also connected to the control port via a pipeline; a backup pressure valve is located at the pipeline connecting the redundant valve and the control port; the backup pressure valve is a normally open valve; the first control unit is electrically connected to the backup pressure valve; the EBS-based redundant braking device also has a third state; when the EBS-based redundant braking device is in the first and second states, the first control unit closes the backup pressure valve; when the EBS-based redundant braking device is in the third state, the first control unit opens the redundant valve, and the gas from the control port passes sequentially through the backup pressure valve and the redundant valve along the pipeline into the braking unit.

[0009] In one optional embodiment, the diaphragm chamber contains a diaphragm and a diaphragm cavity, the diaphragm cavity being enclosed by the diaphragm and the inner wall of the diaphragm chamber; the pressurizing valve is connected to the diaphragm cavity of the diaphragm chamber via a pipeline; the diaphragm seals between the air inlet and the air outlet to block the communication between the air inlet and the air outlet; the diaphragm is movably disposed within the diaphragm chamber; when the EBS-based redundant braking device is in the first state, a portion of the gas from the first gas source enters the diaphragm cavity via the pipeline and the pressurizing valve, causing the diaphragm to move under the pressure of the gas within the diaphragm cavity, thus connecting the air inlet and the air outlet, and a portion of the gas from the first gas source sequentially passes through the air inlet, the diaphragm chamber, and the air outlet to enter the braking unit.

[0010] In one optional embodiment, the backup pressure valve is connected to the diaphragm cavity of the diaphragm air chamber via a pipeline; the EBS-based redundant braking device also has a fourth state; when the EBS-based redundant braking device is in the fourth state, the gas at the control port enters the diaphragm cavity through the backup pressure valve, and the diaphragm moves under the pressure of the gas in the diaphragm cavity, so that the air inlet and the air outlet are connected, and part of the gas from the first gas source enters the braking unit sequentially through the air inlet, the diaphragm air chamber, and the air outlet.

[0011] In one optional embodiment, it further includes an air intake pipe, the first end of which is connected to the first air source unit, and the second end of which is connected to the air inlet of the diaphragm air chamber; and an air outlet pipe, the first end of which is connected to the air outlet of the diaphragm air chamber, and the second end of which is connected to the braking unit.

[0012] In one optional embodiment, it further includes: a first pipeline, the first end of which is connected to the diaphragm cavity of the diaphragm air chamber, and the second end of which is connected to the control port; the backup pressure valve is located at the first pipeline; and a second pipeline, the first end of which is connected to the outlet pipeline, and the second end of which is connected to the first pipeline at the pipeline located between the backup pressure valve and the diaphragm air chamber, so that the redundant valve and the control port are connected via the pipeline, and the backup pressure valve is located at the pipeline where the redundant valve and the control port are connected.

[0013] In one optional embodiment, it further includes a pressure-reducing pipeline, with a first end connected to the first pipeline to communicate with the diaphragm cavity of the diaphragm air chamber, and a second end connected to the outside; a pressure-reducing valve is provided at the pressure-reducing pipeline, and the pressure-reducing valve is a normally closed valve; the first control unit is electrically connected to the pressure-reducing valve.

[0014] In one optional embodiment, a third pipeline is further included, with a first end connected to the first pipeline and a second end connected to the air intake pipeline, so that the redundant valve is connected to the first air source via the pipeline.

[0015] In one optional embodiment, the redundant valve, the pressurizing valve, the backup valve, and the pressure reducing valve are all solenoid valves.

[0016] Secondly, this utility model also provides a vehicle, including: the EBS-based redundant braking device described in the above embodiments.

[0017] Beneficial effects: By using a second control unit independent of the first control unit and a redundant valve electrically connected to the second control unit (the redundant valve being a normally closed valve), when the vehicle encounters extreme situations (such as external impacts) or is in extreme environments (such as high temperature and high pressure), causing the mechanical function of the EBS-based redundant braking device to fail (i.e., the diaphragm chamber to fail), but the electronic control function of the EBS-based redundant braking device is normal, the EBS-based redundant braking device enters a second working state. The second control unit controls the redundant valve to open, and the gas from the first air source can be supplied to the braking unit along the pipeline through the pressurization valve and the redundant valve in sequence. The air path in the EBS-based redundant braking device directly bypasses the diaphragm chamber, achieving braking even when the diaphragm chamber fails and the first control unit functions normally, without affecting the normal working state of the EBS-based redundant braking device.

[0018] Beneficial effects: By setting up a second control unit independent of the first control unit, and electrically connecting the second control unit to the redundant valve, the redundant valve is connected to the control port via a pipeline. A backup pressure valve is installed at the pipeline connecting the redundant valve and the control port, i.e., between the redundant valve and the control port. The redundant valve is normally closed, and the backup pressure valve is normally open. This allows the EBS-based redundant braking device to enter a third state when the vehicle encounters extreme situations (such as external impacts) or is in extreme environments (such as high temperature and high pressure), causing the mechanical function of the EBS-based redundant braking device to fail (i.e., the diaphragm chamber function to fail), and simultaneously, some electronic control functions of the EBS-based redundant braking device to fail (i.e., the electronic control function of the first control unit to fail). The second control unit then controls the redundant valve to open, allowing gas from the control port to be supplied to the braking unit via the pipeline through the backup pressure valve and the redundant valve. During braking, the control port, backup pressure valve, redundant valve, and corresponding pipelines form a redundant backup circuit. This enables braking even when the diaphragm chamber and the first control unit fail, without affecting the normal operation of the EBS-based redundant braking device.

[0019] Beneficial effects: By setting up a second control unit independent of the first control unit, and connecting the control port to the diaphragm cavity via a pipeline, and installing a backup pressure valve at the pipeline connecting the control port and the diaphragm cavity (the backup pressure valve is a normally open valve), the EBS-based redundant braking device enters a fourth state when some of the electronic control functions of the EBS-based redundant braking device fail, i.e., when the electronic control function of the first control unit fails. In this state, the gas from the control port can be supplied to the diaphragm cavity via the pipeline, passing through the backup pressure valve and the first pipeline, thereby causing the diaphragm to move downwards and the air inlet and outlet to connect. The control port, the backup pressure valve, and the corresponding pipeline constitute a backup air supply circuit. Under the premise of not affecting the normal operation of the EBS-based redundant braking device, braking can be achieved when the diaphragm chamber is functioning normally and the first control unit is malfunctioning.

[0020] Beneficial effects: By setting up an EBS-based redundant braking device, the vehicle braking and redundant braking functions are realized through the cooperation of various solenoid valves (redundant valve, backup pressure valve, pressurizing valve, and depressurizing valve) and control units (first control unit and second control unit). When the electrical braking function of the first and second control units fails but the mechanical function is normal, the backup pressure valve is normally open by default, the depressurizing and pressurizing valves are normally closed by default, and the redundant valve is normally closed by default. At this time, the gas supplied at the control port can still smoothly reach the diaphragm cavity and drive the diaphragm, thus achieving redundancy between the electrical braking function and the mechanical braking function of the device. Secondly, when the electrical braking function of the first control unit fails, regardless of whether the diaphragm chamber and related mechanical components fail, the device can apply braking force to the wheels by controlling the opening and closing of the redundant valve, thereby achieving redundancy between the first and second control units in the device. The braking function of this device does not rely solely on the first control unit, the second control unit, the diaphragm chamber, or a single solenoid valve; its risk resistance and extreme environment capability are significantly better than existing EBS-based braking devices (EBS brake valves). Attached Figure Description

[0021] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the EBS-based redundant braking device of this utility model in its first state; Figure 2 This is a schematic diagram of the redundant braking device based on EBS of this utility model in the second state; Figure 3 This is a schematic diagram of the EBS-based redundant braking device of this utility model in the third state. Figure 4 This is a schematic diagram of the redundant braking device based on EBS of this utility model in its fourth state.

[0023] Explanation of reference numerals in the attached figures: 1. First air source unit; 2. Braking unit; 3. Diaphragm air chamber; 4. Redundant valve; 5. Pressurizing valve; 6. First control unit; 7. Second control unit; 8. Control port; 9. Backup pressure valve; 10. Diaphragm cavity; 11. Air inlet; 12. Air outlet; 13. Pressure reducing pipeline; 14. Pressure reducing valve; 15. Air inlet pipeline; 16. Air outlet pipeline; 17. First pipeline; 18. Second pipeline; 19. Third pipeline. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0025] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0026] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0027] Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0028] The following is combined Figures 1 to 4 The following describes embodiments of the present invention.

[0029] According to an embodiment of this utility model, an EBS-based redundant braking device is provided, disposed between a first air source unit 1 and a braking unit 2, comprising: a diaphragm air chamber 3, with an air inlet 11 connected to the first air source unit 1 and an air outlet 12 connected to the braking unit 2; a redundant valve 4, connected to both the first air source unit 1 and the braking unit 2 via pipelines; the redundant valve 4 is a normally closed valve; wherein a pressure valve 5 is provided at the pipeline connecting the redundant valve 4 to the first air source unit 1; the pressure valve 5 is a normally closed valve; a first control unit 6, electrically connected to the pressure valve 5; and a second control unit 7. The redundant valve 4 is electrically connected to the redundant valve; the second control unit 7 and the first control unit 6 are independently configured; wherein, the EBS-based redundant braking device has a first state and a second state; when the EBS-based redundant braking device is in the first state, the gas from the first gas source 1 enters the braking unit 2 through the diaphragm gas chamber 3; when the EBS-based redundant braking device is in the second state, the second control unit 7 opens the redundant valve 4 and the pressurizing valve 5, and the gas from the first gas source 1 enters the braking unit 2 along the pipeline through the pressurizing valve 5 and the redundant valve 4 in sequence.

[0030] It should be noted that, Figure 1 This is a schematic diagram of the EBS-based redundant braking device in its first state. In the first state, the mechanical functions of the EBS-based redundant braking device are normal (the diaphragm air chamber 3 functions normally) and the electronic control functions are normal (the first control unit 6 and the second control unit 7 function normally). Figure 2 This is a schematic diagram of the EBS-based redundant braking device in its second state. The second state is characterized by mechanical failure (failure of diaphragm chamber 3) and normal electronic control (normal function of first control unit 6 and second control unit 7) within the EBS-based redundant braking device. Figure 3 This is a schematic diagram of the EBS-based redundant braking device in its third state. The third state is characterized by the failure of mechanical functions (failure of diaphragm chamber 3) and partial failure of electronic control functions (failure of first control unit 6 and normal function of second control unit 7) within the EBS-based redundant braking device. Figure 4 This is a schematic diagram of the EBS-based redundant braking device in its fourth state. In the fourth state, the mechanical functions of the EBS-based redundant braking device are normal (the diaphragm air chamber 3 is functioning normally), but the electronic control functions are partially malfunctioning (the first control unit 6 is malfunctioning, while the second control unit 7 is functioning normally).

[0031] Combination Figure 1As shown, the second pipeline 18 is connected to the first pipeline 17, the third pipeline 19 is connected to the first pipeline 17, and the third pipeline 19 is connected to the intake pipeline 15. The redundant valve 4 can be installed on the second pipeline 18 and connected to the first air source unit 1 via a section of the second pipeline 18, a section of the first pipeline 17, a section of the third pipeline 19, and a section of the intake pipeline 15. The pressurization valve 5 is installed at the pipeline where the redundant valve 4 is connected to the first air source unit 1. Specifically, the pressurization valve 5 can be installed at a section of the third pipeline 19.

[0032] It should be noted that the first air source unit 1 is used to generate and supply air to the EBS-based redundant braking device, and is an existing component, which may be, but is not limited to, an air compressor; the braking unit 2 is used to convert the pressure energy of compressed air into mechanical thrust, thereby braking, and the braking unit 2 is an existing component.

[0033] It should be noted that the diaphragm chamber 3 contains a diaphragm, which can move under the pressure of the gas in the diaphragm cavity 10, thereby connecting or blocking the air inlet 11 and the air outlet 12 to control the opening and closing of the air circuit of the EBS-based redundant braking device, or the opening degree between the air inlet 11 and the air outlet 12 in the diaphragm chamber 3. The diaphragm chamber 3 is an existing component.

[0034] It should be noted that the first control unit 6 and the second control unit 7 are set independently of each other. Both the first control unit 6 and the second control unit 7 can be, but are not limited to, ECU (electronic control unit). ECU is an existing component.

[0035] In this embodiment, through a second control unit 7 independent of the first control unit 6 and a redundant valve 4 electrically connected to the second control unit 7, and the redundant valve 4 being a normally closed valve, the EBS-based redundant braking device can fail mechanically when the vehicle encounters extreme situations (such as external impacts) or is in extreme environments (such as high temperature and high pressure), i.e., when the diaphragm chamber 3 fails, but the electronic control function of the EBS-based redundant braking device is normal, the EBS-based redundant braking device enters a second working state. The second control unit 7 controls the redundant valve 4 to open, and the gas from the first air source 1 can be supplied to the braking unit 2 along the pipeline through the pressurization valve 5 and the redundant valve 4 in sequence. The air path in the EBS-based redundant braking device directly bypasses the diaphragm chamber 3, and braking can be achieved even when the diaphragm chamber 3 fails and the first control unit 6 functions normally, without affecting the normal working state of the EBS-based redundant braking device.

[0036] In some embodiments, the system further includes a control port 8, adapted to communicate with an external gas source; the redundant valve 4 is also connected to the control port 8 via a pipeline; a backup pressure valve 9 is located at the pipeline connecting the redundant valve 4 and the control port 8; the backup pressure valve 9 is a normally open valve; the first control unit 6 is electrically connected to the backup pressure valve 9; the EBS-based redundant braking device also has a third state; when the EBS-based redundant braking device is in the first and second states, the first control unit 6 closes the backup pressure valve 9; when the EBS-based redundant braking device is in the third state, the first control unit 6 opens the redundant valve 4, and the gas from the control port 8 passes sequentially through the backup pressure valve 9 and the redundant valve 4 along the pipeline into the braking unit 2.

[0037] It should be noted that the control port 8 is connected to an external air source and is used to introduce gas into the EBS-based redundant braking device, specifically control gas; in addition, the gas in the first pipeline 17 can also be discharged from the control port 8.

[0038] Combination Figure 3 As shown, the first pipeline 17 is connected to the control port 8, the second pipeline 18 is connected to the first pipeline 17, the redundant valve 4 is set at the second pipeline 18, and the redundant valve 4 is connected to the control port 8 through a part of the second pipeline 18 and a part of the first pipeline 17; the backup pressure valve 9 is set at the pipeline between the redundant valve 4 and the control port 8, and the backup pressure valve 9 is set at a part of the first pipeline 17.

[0039] In this embodiment, a second control unit 7, independent of the first control unit 6, is provided. The second control unit 7 is electrically connected to the redundant valve 4, which is connected to the control port 8 via a pipeline. A backup pressure valve 9 is installed at the pipeline connecting the redundant valve 4 and the control port 8, i.e., between the redundant valve 4 and the control port 8. The redundant valve 4 is a normally closed valve, and the backup pressure valve 9 is a normally open valve. This ensures that when the vehicle encounters extreme situations (such as external impacts) or is in extreme environments (such as high temperature and high pressure), causing the mechanical function of the EBS-based redundant braking device to fail—that is, when the diaphragm chamber 3 fails—simultaneously… When the electronic control function of the EBS-based redundant braking device fails, that is, when the electronic control function of the first control unit 6 fails, the EBS-based redundant braking device enters the third state. The second control unit 7 controls the redundant valve 4 to open, and the gas from the control port 8 can be supplied to the braking part 2 through the backup pressure valve 9 and the redundant valve 4 in sequence along the pipeline. During braking, the control port 8, the backup pressure valve 9, the redundant valve 4 and the corresponding pipeline form a redundant backup circuit. Under the premise of not affecting the normal working state of the EBS-based redundant braking device, braking can be achieved even when the diaphragm air chamber 3 fails or the first control unit 6 fails.

[0040] In some embodiments, the diaphragm chamber 3 is provided with a diaphragm and a diaphragm cavity 10, the diaphragm cavity 10 being enclosed by the diaphragm and the inner wall of the diaphragm chamber 3; the pressure valve 5 is connected to the diaphragm cavity 10 of the diaphragm chamber 3 via a pipeline; the diaphragm is sealed between the air inlet 11 and the air outlet 12 to block the communication between the air inlet 11 and the air outlet 12; the diaphragm is movably disposed within the diaphragm chamber 3; when the EBS-based redundant braking device is in the first state, a portion of the gas from the first gas source 1 enters the diaphragm cavity 10 via the pipeline and the pressure valve 5, causing the diaphragm to move under the pressure of the gas in the diaphragm cavity 10, thus connecting the air inlet 11 and the air outlet 12, and a portion of the gas from the first gas source 1 sequentially passes through the air inlet 11, the diaphragm chamber 3, and the air outlet 12 into the braking unit 2.

[0041] In some embodiments, the backup pressure valve 9 is connected to the diaphragm cavity 10 of the diaphragm air chamber 3 via a pipeline; the EBS-based redundant braking device also has a fourth state; when the EBS-based redundant braking device is in the fourth state, the gas from the control port 8 enters the diaphragm cavity 10 through the backup pressure valve 9, and the diaphragm moves under the pressure of the gas in the diaphragm cavity 10, so that the air inlet 11 is connected to the air outlet 12, and part of the gas from the first gas source 1 enters the braking unit 2 through the air inlet 11, the diaphragm air chamber 3, and the air outlet 12 in sequence.

[0042] It should be noted that the first pipeline 17 is connected to the diaphragm cavity 10, and the two ends of the third pipeline 19 are connected to the air intake pipeline 15 and the first pipeline 17 respectively. The pressure valve 5 is located at the third pipeline 19.

[0043] Combination Figure 1 and Figure 4 As shown, the EBS-based redundant braking device is in the first and fourth states respectively. In both states, the mechanical functions of the EBS-based redundant braking device are normal. The first state is the normal operating state of the EBS-based redundant braking device. In the above states, during braking, since the air path inside the EBS-based redundant braking device needs to pass through the diaphragm chamber 3, and the air inlet 11 and air outlet 12 of the diaphragm chamber 3 are blocked and shut off by the diaphragm when not in operation, the air inlet 11 and air outlet 12 are not connected. Therefore, during braking, combined with... Figure 1As shown, in the first state, the first control unit 6 functions normally. Part of the gas from the first air source 1 flows through the pipeline and passes through the pressurization valve 5. Under the pressurization action of the pressurization valve 5, it is supplied into the diaphragm cavity 10. The pressurized air forces the diaphragm to move downward, thereby causing the diaphragm to move away from the blocking position of the air inlet 11 and the air outlet 12, so that the air inlet 11 and the air outlet 12 are connected. The gas from the first air source 1 is supplied to the braking unit 2 through the air inlet pipeline 15, the air inlet 11, the air outlet 12, and the air outlet pipeline 16 in sequence, thereby realizing braking.

[0044] Furthermore, during braking, combined Figure 4 As shown, in the fourth state, the second control unit 7 fails, while the diaphragm chamber 3 functions normally. Since the pressure valve 5 is electrically connected to the second control unit 7 and is a normally closed valve, the redundant braking device based on EBS loses its ability to control the opening of the pressure valve 5. At this time, it is impossible to supply air to the diaphragm cavity 10 through the pressure valve 5. Therefore, the gas at the control port 8 is used to supply gas to the diaphragm cavity 10 through the backup pressure valve 9 and the first pipeline 17. The gas accumulates continuously in the diaphragm cavity 10, thereby pressing the diaphragm downward. The air inlet 11 and the air outlet 12 are connected, so that the gas from the first air source 1 is supplied to the braking unit 2.

[0045] In this embodiment, a second control unit 7, independent of the first control unit 6, is provided. The control port 8 is connected to the diaphragm cavity 10 via a pipeline. A backup pressure valve 9 is provided at the pipeline connecting the control port 8 and the diaphragm cavity 10. The backup pressure valve 9 is a normally open valve. This allows the EBS-based redundant braking device to enter a fourth state when some of the electronic control functions of the EBS-based redundant braking device fail, i.e., when the electronic control function of the first control unit 6 fails. In this state, the gas from the control port 8 can be supplied to the diaphragm cavity 10 via the backup pressure valve 9 and the first pipeline 17, thereby causing the diaphragm to move downward. The air inlet 11 and the air outlet 12 are connected. The control port 8, the backup pressure valve 9, and the corresponding pipeline constitute a backup air supply circuit. Under the premise of not affecting the normal working state of the EBS-based redundant braking device, braking can be achieved when the diaphragm chamber 3 is functioning normally and the first control unit 6 is malfunctioning.

[0046] In some embodiments, it further includes an air intake pipe 15, with a first end connected to the first air source unit 1 and a second end connected to the air inlet 11 of the diaphragm air chamber 3; and an air outlet pipe 16, with a first end connected to the air outlet 12 of the diaphragm air chamber 3 and a second end connected to the braking unit 2.

[0047] In some embodiments, the system further includes a first pipeline 17, with a first end connected to the diaphragm cavity 10 of the diaphragm air chamber 3 and a second end connected to the control port 8; a backup pressure valve 9 is disposed at the first pipeline 17; and a second pipeline 18, with a first end connected to the air outlet pipeline 16 and a second end connected to the first pipeline 17, and the second pipeline 18 is connected to the pipeline of the first pipeline 17 located between the backup pressure valve 9 and the diaphragm air chamber 3, so that the redundant valve 4 is connected to the control port 8 via the pipeline.

[0048] Specifically, the second pipeline 18 is connected to the first pipeline 17 downstream of the backup pressure valve 9. The redundant valve 4 is connected to the control port 8 via a section of the second pipeline 18 and a section of the first pipeline 17. The backup pressure valve 9 is located at the pipeline connecting the redundant valve 4 and the control port 8, that is, the redundant valve 4 is connected after the backup pressure valve 9, and the redundant valve 4 is connected to the gas outlet pipeline 16.

[0049] In some embodiments, it further includes a pressure reducing pipeline 13, with a first end connected to the first pipeline 17 to communicate with the diaphragm cavity 10 of the diaphragm air chamber 3, and a second end connected to the outside; a pressure reducing valve 14 is provided at the pressure reducing pipeline 13, and the pressure reducing valve 14 is a normally closed valve; the first control unit 6 is electrically connected to the pressure reducing valve 14.

[0050] Specifically, the first pipeline 17 is connected to the diaphragm cavity 10, and the pressure reducing pipeline 13 is connected to the first pipeline 17, thereby achieving the purpose of connecting with the diaphragm cavity 10; the pressure reducing valve 14 is a normally closed valve. When pressure is reduced, the first control unit 6 controls the pressure reducing valve 14 to open, and the gas in the diaphragm cavity 10 is discharged to the outside of the valve of the EBS-based redundant braking device through the pressure reducing pipeline 13, so that the diaphragm is reset.

[0051] In some embodiments, a third pipeline 19 is also included, with a first end connected to the first pipeline 17 and a second end connected to the air intake pipeline 15, so that the redundant valve 4 is connected to the first air source unit 1 via the pipeline.

[0052] Specifically, the redundant valve 4 is installed at the second pipeline 18, and the first pipeline 17 is connected to the second pipeline 18, so that the third pipeline 19 is connected to the first pipeline 17. The third pipeline 19 is also connected to the intake pipeline 15, thereby achieving the purpose of connecting the redundant valve 4 to the first air source section 1.

[0053] Furthermore, the redundant valve 4 is connected to the first air source unit 1 via a portion of the second pipeline 18, a portion of the first pipeline 17, a portion of the third pipeline 19, and a portion of the air intake pipeline 15.

[0054] In some embodiments, the redundant valve 4, the pressurizing valve 5, the backup valve 9, and the pressure reducing valve 14 are all solenoid valves. The redundant valve 4 is electrically connected to the second control unit 7, and the pressurizing valve 5, the backup valve 9, and the pressure reducing valve 14 are electrically connected to the first control unit 6.

[0055] The specific working process is as follows: the backup pressure valve 9 is a normally open solenoid valve, and the redundant valve 4, pressure reducing valve 14, and pressure increasing valve 5 are normally closed solenoid valves.

[0056] Combination Figure 1 As shown, the redundant braking device based on EBS is in its first state, which is the normal operating state. This is the condition when the electronic control function (the first control unit 6 and the second control unit 7 function normally) and mechanical function (the diaphragm chamber 3 function normally) of the redundant braking device based on EBS are normal. During braking, the first control unit 6 closes the backup pressure valve 9, preventing the gas from the second control port 8 from entering the diaphragm chamber 10. The pressure reducing valve 14 remains normally closed. The first control unit 6 opens the pressure increasing valve 5, and the second control unit 7 keeps the redundant valve 4 normally closed. The gas from the first gas source 1 enters the diaphragm chamber 10 via the pressure increasing valve 5. In the diaphragm cavity 10 inside chamber 3, the diaphragm is pushed down, so that the air inlet 11 and the air outlet 12 are connected. Then, the gas from the first air source 1 is supplied to the braking unit 2 through the air inlet 11 and the air outlet 12 in sequence, and the braking unit 2 applies braking force to the wheels. When depressurization occurs, the first control unit 6 turns the pressure reducing valve 14 into the open state, the backup pressure valve 9 remains in the closed state, the pressure increasing valve 5 turns into the normally closed state, and the second control unit 7 keeps the redundant valve 4 in the normally closed state. The gas in the diaphragm cavity 10 is discharged from the valve through the pressure reducing valve 14 and the pressure reducing pipeline 13, so that the diaphragm is reset, and the air inlet 11 and the air outlet 12 are blocked and closed by the diaphragm again, so that the air inlet 11 and the air outlet 12 are not connected.

[0057] Combination Figure 2As shown, the redundant braking device based on EBS is in the second state, which is the operating condition when the electronic control function of the redundant braking device based on EBS is normal (the functions of the first control unit 6 and the second control unit 7 are normal) and the mechanical function is failed (the function of the diaphragm air chamber 3 is failed, and the diaphragm cannot move down). During braking, the first control unit 6 turns the backup pressure valve 9 to the closed state, and the gas from the control port 8 is blocked by the backup pressure valve 9 and cannot enter the diaphragm cavity 10. The pressure reducing valve 14 remains in the normally closed state. The first control unit 6 turns the pressure increasing valve 5 to the open state. When the redundant braking device based on EBS detects that the diaphragm air chamber 3 is malfunctioning and its related mechanical components (diaphragm) are incapacitated and cannot move down, the second control unit 7 turns the redundant valve 4 to the open state, and the gas from the first gas source 1 flows along the... The pipeline reaches the braking unit 2 via the pressurization valve 5 and the redundant valve 4. Specifically, it can be supplied from the first air source 1, sequentially along a section of the intake pipeline 15, the third pipeline 19, a section of the first pipeline 17, a section of the second pipeline 18, and a section of the exhaust pipeline 16 to the braking unit 2, thereby applying braking force to the wheels. Since the air source gas does not pass through the diaphragm chamber 3, the magnitude of the braking force provided to the wheels at this time cannot be adjusted, and it is the maximum braking force based on the air pressure value in the pipeline. When depressurization is performed, the first control unit 6 turns the pressure reducing valve 14 into the open state, the backup pressure valve 9 remains in the closed state, the pressurization valve 5 turns into the normally closed state, and the second control unit 7 turns the redundant valve 4 into the open state. The gas in the pipeline is discharged outside the valve through the pressure reducing valve 14 and the pressure reducing pipeline 13.

[0058] Combination Figure 3 As shown, the redundant braking device based on EBS is in the third state, which is the operating condition when the electronic control function of the redundant braking device based on EBS fails (the function of the first control unit 6 fails, while the function of the second control unit 7 is normal) and the mechanical function fails (the function of the diaphragm chamber 3 fails, and the diaphragm cannot move down). During braking, the backup pressure valve 9 remains open, the pressure reducing valve 14 and the pressure increasing valve 5 remain closed, and the second control unit 7 turns the redundant valve 4 into the open state. The gas at the control port 8 passes through the backup pressure valve 9 and the redundant valve 4 in sequence along the pipeline to reach the outlet pipeline 16, and is supplied to the braking unit 2 along the outlet pipeline 16, thereby applying braking force to the wheel. Since the gas source does not pass through the diaphragm chamber 3, the magnitude of the braking force provided to the wheel at this time cannot be adjusted, and it is the maximum braking force based on the current air pressure value in the pipeline. During decompression, the state of each solenoid valve remains unchanged, and the gas in the pipeline is discharged from the valve through the control port 8.

[0059] Combination Figure 4As shown, the redundant braking device based on EBS is in the fourth state, which is the operating condition when the electronic control function of the redundant braking device based on EBS fails (the function of the first control unit 6 fails, and the function of the second control unit 7 is normal), while the mechanical function is normal (the function of the diaphragm air chamber 3 is normal). During braking, the backup pressure valve 9 remains open, the pressure reducing valve 14 and the pressure increasing valve 5 remain closed, the second control unit 7 keeps the redundant valve 4 in a normally closed state, and the gas at the control port 8 enters the diaphragm chamber 10 through the backup pressure valve 9 and pushes the diaphragm downward, so that the air inlet 11 and the air outlet 12 are connected, thereby applying braking force to the wheel. During decompression, the state of each solenoid valve remains unchanged, the gas in the diaphragm chamber 10 is discharged from the valve through the control port 8, and the diaphragm resets.

[0060] In this embodiment, an EBS-based redundant braking device is configured. Through the cooperation of various solenoid valves (redundant valve 4, backup pressure valve 9, pressurizing valve 5, and depressurizing valve 14) and control units (first control unit 6 and second control unit 7), vehicle braking and redundant braking functions are achieved. Even when the electrical braking function of the first control unit 6 and the second control unit 7 fails, but the mechanical function remains normal, the backup pressure valve 9 is normally open by default, the depressurizing valve 14 and pressurizing valve 5 are normally closed by default, and the redundant valve 4 is normally closed by default. At this time, the gas supplied through the control port 8 can still smoothly reach the diaphragm cavity 10 and drive the diaphragm to work, thereby achieving… The device provides redundancy between its electronic braking function and mechanical braking function. Secondly, when the electronic braking function of the first control unit 6 fails, regardless of whether the diaphragm chamber 3 and related mechanical components fail, the device can apply braking force to the wheels by controlling the opening and closing of the redundant valve 4, thereby achieving redundancy between the first control unit 6 and the second control unit 7 in the device. The device's braking function does not rely solely on the first control unit 6, the second control unit 7, the diaphragm chamber 3, or a certain solenoid valve. Its risk resistance and extreme environment capabilities are significantly better than existing EBS-based braking devices (EBS brake valves).

[0061] According to an embodiment of the present invention, another aspect provides a vehicle, including: the EBS-based redundant braking device described in the above embodiments.

[0062] Obviously, the above embodiments are merely examples for clear illustration and are not intended to limit the implementation. Although embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and all such modifications and variations fall within the scope defined by the present invention.

Claims

1. A redundant braking device based on EBS, disposed between a first air source unit (1) and a braking unit (2), characterized in that, include: The diaphragm air chamber (3) has an air inlet (11) connected to the first air source unit (1) and an air outlet (12) connected to the braking unit (2). The redundant valve (4) is connected to the first air source unit (1) and the braking unit (2) respectively via pipelines; the redundant valve (4) is a normally closed valve; Wherein, a pressure valve (5) is provided at the pipeline connecting the redundant valve (4) and the first gas source (1); the pressure valve (5) is a normally closed valve; The first control unit (6) is electrically connected to the pressure valve (5); The second control unit (7) is electrically connected to the redundant valve (4); the second control unit (7) and the first control unit (6) are set independently of each other; Among them, the redundant braking device based on EBS has a first state and a second state; When the EBS-based redundant braking device is in the first state, the gas from the first gas source (1) enters the braking unit (2) through the diaphragm gas chamber (3). When the EBS-based redundant braking device is in the second state, the second control unit (7) opens the redundant valve (4) and the pressurizing valve (5), and the gas from the first gas source (1) passes through the pressurizing valve (5) and the redundant valve (4) in sequence along the pipeline and enters the braking unit (2).

2. The redundant braking device based on EBS according to claim 1, characterized in that, It also includes a control port (8), which is suitable for connecting to an external gas source; The redundant valve (4) is also connected to the control port (8) via a pipeline; A backup pressure valve (9) is located at the pipeline where the redundant valve (4) connects to the control port (8); the backup pressure valve (9) is a normally open valve. The first control unit (6) is electrically connected to the backup pressure valve (9); The EBS-based redundant braking device also has a third state; When the EBS-based redundant braking device is in the first state and the second state, the first control unit (6) closes the backup pressure valve (9). When the EBS-based redundant braking device is in the third state, the first control unit (6) opens the redundant valve (4), and the gas at the control port (8) enters the braking part (2) through the backup pressure valve (9) and the redundant valve (4) in sequence along the pipeline.

3. The redundant braking device based on EBS according to claim 2, characterized in that, The membrane air chamber (3) is provided with a membrane and a membrane cavity (10) inside, and the membrane cavity (10) is formed by the membrane and the inner wall of the membrane air chamber (3); The pressurization valve (5) is connected to the diaphragm cavity (10) of the diaphragm air chamber (3) via a pipeline; The diaphragm is sealed between the air inlet (11) and the air outlet (12) to block the communication between the air inlet (11) and the air outlet (12); The diaphragm is movably disposed within the diaphragm air chamber (3); When the EBS-based redundant braking device is in the first state, part of the gas from the first gas source (1) enters the diaphragm cavity (10) through the pressurization valve (5) along the pipeline, causing the diaphragm to move under the pressure of the gas in the diaphragm cavity (10), so that the air inlet (11) and the air outlet (12) are connected, and part of the gas from the first gas source (1) enters the braking unit (2) through the air inlet (11), the air outlet (12) and the pipeline.

4. The redundant braking device based on EBS according to claim 3, characterized in that, The pressure relief valve (9) is connected to the diaphragm cavity (10) of the diaphragm air chamber (3) via a pipeline; The EBS-based redundant braking device also has a fourth state; When the EBS-based redundant braking device is in the fourth state, the gas from the control port (8) enters the diaphragm cavity (10) through the backup pressure valve (9). The diaphragm moves under the pressure of the gas in the diaphragm cavity (10), so that the air inlet (11) and the air outlet (12) are connected. Part of the gas from the first gas source (1) enters the braking unit (2) through the air inlet (11), the air outlet (12) and the pipeline.

5. The EBS-based redundant braking device according to any one of claims 2 to 4, characterized in that, It also includes an air intake pipe (15), the first end of which is connected to the first air source section (1), and the second end of which is connected to the air inlet (11) of the diaphragm air chamber (3); The air outlet pipe (16) has its first end connected to the air outlet (12) of the diaphragm air chamber (3) and its second end connected to the braking part (2).

6. The EBS-based redundant braking device according to claim 5, characterized in that, It also includes a first pipeline (17), the first end of which is connected to the membrane cavity (10) of the membrane air chamber (3), and the second end is connected to the control port (8); The pressure relief valve (9) is located at the first pipeline (17); The second pipeline (18) has its first end connected to the outlet pipeline (16) and its second end connected to the first pipeline (17). The second pipeline (18) is connected to the pipeline of the first pipeline (17) located between the backup pressure valve (9) and the diaphragm air chamber (3), so that the redundant valve (4) and the control port (8) are connected by the pipeline.

7. The EBS-based redundant braking device according to claim 6, characterized in that, It also includes a pressure reducing pipeline (13), the first end of which is connected to the first pipeline (17) to communicate with the diaphragm cavity (10) of the diaphragm air chamber (3), and the second end is connected to the outside. A pressure reducing valve (14) is provided at the pressure reducing pipeline (13), and the pressure reducing valve (14) is a normally closed valve; The first control unit (6) is electrically connected to the pressure reducing valve (14).

8. The EBS-based redundant braking device according to claim 7, characterized in that, It also includes a third pipeline (19), with its first end connected to the first pipeline (17) and its second end connected to the air intake pipeline (15), so that the redundant valve (4) is connected to the first air source unit (1) via the pipeline.

9. The EBS-based redundant braking device according to claim 7, characterized in that, The redundant valve (4), the pressurizing valve (5), the backup pressure valve (9), and the pressure reducing valve (14) are all solenoid valves.

10. A vehicle, characterized in that, include: The redundant braking device based on EBS according to any one of claims 1-9.

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