Electronic mechanical braking system and vehicle applying same

Abstract

The utility model provides an electronic mechanical brake system and a vehicle using the same, and the electronic mechanical brake system comprises a central electric control module, a brake pedal control module, a parking handle control module, a trailer parking control module and a trailer brake module, the central electric control module is electrically connected with the brake pedal control module, the parking handle control module, the trailer parking control module and the trailer brake module. The trailer parking control module and the trailer braking module are connected through an air path. According to the electronic mechanical braking system and the vehicle applying the electronic mechanical braking system, as for a trailer provided with an air braking system, control over trailer braking is achieved through electrical connection, matching of a mechanical braking system of a tractor and the air braking system of the trailer is achieved, main suspension compatibility of different trailer control modes is achieved, and the control reliability of the trailer is improved. The braking requirements under different driving conditions are met, the energy transmission efficiency is higher, higher control precision is achieved, and the safety and reliability of a braking system are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of commercial vehicles, in particular to an electronic mechanical braking system and a vehicle using the same. Background Art

[0002] The Electronic Mechanical Brake (EMB) system uses circuits instead of gas (such as Electronic Brake Systems, EBS) or liquid (such as Electronic Hydraulic Brake, EHB) to achieve the transmission of braking energy, which can achieve higher energy transfer efficiency and higher control accuracy and performance. It has the following characteristics: fast response, shorter braking distance; high integration, lightweight; easy maintenance, low cost, etc.

[0003] Since the towed vehicle in current commercial vehicles still uses a pneumatic brake system that uses compressed air, it is necessary to design an electromechanical brake system to achieve control of the towed vehicle. Utility Model Content

[0004] The purpose of the utility model is to provide an electronic mechanical braking system and a vehicle using the same, which can solve at least one of the above technical problems.

[0005] According to one aspect of the utility model, an electromechanical brake system is provided, comprising: a central electronic control module, a brake pedal control module, a parking handle control module, a trailer parking control module and a trailer brake module.

[0006] The central electronic control module is electrically connected to the brake pedal control module, the parking handle control module, the trailer parking control module and the trailer brake module respectively. The central electronic control module is used to calculate the braking parameters after receiving the braking signal output by the brake pedal control module or the parking handle control module, and output the braking command to the trailer parking control module or the trailer brake module;

[0007] The trailer parking control module and the trailer brake module are connected through an air circuit. The trailer parking control module can control the air pressure output by the trailer brake module according to the brake command output by the central electronic control module to realize the trailer parking brake;

[0008] The trailer brake module can output corresponding air pressure according to the brake command output by the central electronic control module to achieve trailer driving braking.

[0009] In some embodiments, the brake pedal control module is connected to the trailer brake module through an air circuit, and the brake pedal control module controls the air pressure output by the trailer brake module according to the brake signal to achieve trailer braking.

[0010] In some embodiments, when the trailer is equipped with an electronic brake system EBS, the central electronic control module is in communication connection with the electronic brake system EBS, and the electronic brake system EBS receives a brake command output by the central electronic control module to achieve trailer braking.

[0011] In some embodiments, the brake pedal control module is connected to the brake pedal, the brake pedal control module collects the brake signal and outputs it to the central electronic control module, and the central electronic control module calculates the braking force required by the tractor and the trailer based on the brake signal.

[0012] In some embodiments, the trailer parking control module includes a first solenoid valve and a second solenoid valve, the first air inlet of the first solenoid valve is connected to the air source of the whole vehicle, the first air outlet of the first solenoid valve is connected to the second air inlet of the second solenoid valve, the second air outlet of the second solenoid valve is connected to the atmosphere, and the first air outlet of the first solenoid valve is connected to the trailer brake module.

[0013] In some embodiments, the trailer brake module includes a third solenoid valve, a fourth solenoid valve, a fifth solenoid valve and a trailer valve, the third air inlet of the third solenoid valve is connected to the brake pedal control module through an air circuit, the third air outlet of the third solenoid valve is connected to the first control air port of the trailer valve, the fourth air inlet of the fourth solenoid valve is connected to the air source of the whole vehicle, the fourth air outlet of the fourth solenoid valve is connected to the fifth air inlet of the fifth solenoid valve, the fifth air outlet of the fifth solenoid valve is connected to the atmosphere, the fourth air outlet of the fourth solenoid valve is connected to the first control air port of the trailer valve, the first control air port and the second control air port of the trailer valve are respectively connected to the brake pedal control module through an air circuit, the valve body air outlet of the trailer valve outputs air pressure to the brake system provided on the trailer to realize trailer braking; the inflation air port of the trailer valve is connected to the trailer air cylinder through an air circuit to supply air to the trailer air cylinder.

[0014] In some embodiments, the trailer valve in the trailer brake module includes a throttle valve, the sixth air inlet of the throttle valve is connected to the air source of the whole vehicle, the sixth air outlet of the throttle valve is connected to the inflation port of the trailer valve, the inflation port of the trailer valve is connected to the trailer air tank through an air circuit to supply air to the trailer air tank; the control port of the trailer valve is connected to the first control air port of the trailer valve.

[0015] In some embodiments, the inflation port of the trailer valve is connected to an emergency brake valve, and the emergency brake valve is used to achieve emergency braking of the trailer when the valve body outlet of the trailer valve fails.

[0016] In some embodiments, the electric control ends of the first solenoid valve, the second solenoid valve, the third solenoid valve, the fourth solenoid valve and the fifth solenoid valve are electrically connected to the central electric control module respectively.

[0017] According to a second aspect of the present invention, a vehicle is provided, which is equipped with any one of the above electronic mechanical braking systems.

[0018] The beneficial effect of the technical solution provided by the utility model is that, through the setting of the central electronic control module, the trailer parking control module and the trailer braking module, for the trailer equipped with the pneumatic braking system, the electrical connection is used to realize the control of the trailer braking, and the electronic mechanical braking and the pneumatic braking are combined to solve the matching of the mechanical braking system of the tractor and the pneumatic braking system of the trailer, and the main-trailer compatibility of different trailer control modes is achieved to meet the braking requirements under different driving conditions. At the same time, it can be compatible with the trailer equipped with the electronic braking system EBS, the energy transfer efficiency is higher, and higher control accuracy can be achieved, while the safety and reliability of the braking system are improved.

[0019] In addition, in the technical solution of the present utility model, unless otherwise specified, the technical solution can be implemented by adopting conventional means in the art. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 The present invention is a schematic structural diagram of an electronic mechanical braking system according to an embodiment of the present invention.

[0022] Figure 2 The figure is a schematic structural diagram of an electronic mechanical braking system according to another embodiment of the present invention.

[0023] Figure 3 It is a structural schematic diagram of a trailer parking control module in an electronic mechanical braking system according to one embodiment of the utility model.

[0024] Figure 4 It is a structural schematic diagram of a trailer brake module in an electronic mechanical brake system according to one embodiment of the utility model. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are part of the embodiments of the utility model, rather than all of the embodiments, and are only used to explain the utility model, not to limit the utility model. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0026] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "front", "back", "vertical", "horizontal", "inside", "outside", "two ends", "both sides", "bottom", "top" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred elements must have a specific orientation or be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "superior", "inferior", "primary", "secondary" and the like are only used for descriptive purposes and can be simply used to more clearly distinguish different components, but cannot be understood as indicating or implying relative importance.

[0027] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] See the instruction manual Figure 1 As shown, an electronic mechanical braking system according to the utility model is schematically shown, including: a central electronic control module 101, a brake pedal control module 102, a parking handle control module 103, a trailer parking control module 104 and a trailer braking module 105.

[0029] Among them, the central electronic control module 101 is electrically connected to the brake pedal control module 102, the parking handle control module 103, the trailer parking control module 104 and the trailer brake module 105 respectively. The central electronic control module 101 is used to receive the braking signal output by the brake pedal control module 102 or the parking handle control module 103, calculate the braking parameters, and output the braking command to the trailer parking control module 104 or the trailer brake module 105.

[0030] The trailer parking control module 104 and the trailer brake module 105 are connected via an air circuit. The trailer parking control module 104 can control the air pressure output by the trailer brake module 105 according to the brake command output by the central electronic control module 101 to achieve the trailer parking brake.

[0031] The trailer brake module 105 can output corresponding air pressure according to the brake command output by the central electronic control module 101 to achieve trailer driving braking.

[0032] In an optional embodiment, the brake pedal control module 102 can be connected to the brake pedal, and the brake pedal control module 102 can include a pedal travel sensor, which outputs the collected brake signal to the central electronic control module 101, and the central electronic control module 101 calculates the braking force required by the tractor and the trailer based on the brake signal.

[0033] In an optional embodiment, the brake pedal control module 102 may also include a force sensor, which outputs the collected braking signal to the central electronic control module 101, and the central electronic control module 101 calculates the braking force required by the tractor and the trailer based on the braking signal.

[0034] The brake pedal control module 102 can be directly connected to the trailer brake module 105 through an air circuit. The brake pedal control module 102 controls the air pressure output by the trailer brake module 105 according to the brake signal to achieve trailer braking.

[0035] Reference Manual Attached Figure 2 As shown, when the trailer is equipped with an electronic brake system EBS, the central electronic control module 101 is in communication connection with the electronic brake system EBS, and the electronic brake system EBS receives the braking command output by the central electronic control module to implement trailer braking.

[0036] Specifically, the utility model provides an electronic mechanical braking system, whose working modes include the following situations:

[0037] When the vehicle is in driving state, the driver drives the brake pedal, and the brake pedal is connected to the brake pedal control module 102. The brake pedal control module 102 sends the acquired brake signal to the central electronic control module 101. The central electronic control module 101 calculates the braking force required for braking according to the current driving parameters and the brake signal, and controls the trailer brake module 105 to output air pressure to the pneumatic brake system configured for the trailer, so as to realize the driving braking of the trailer.

[0038] When the vehicle is in driving state and the trailer is equipped with an electronic braking system EBS, the driver drives the brake pedal, and the brake pedal is connected to the brake pedal control module 102. The brake pedal control module 102 sends the acquired braking signal to the central electronic control module 101. The central electronic control module 101 calculates the braking force required for braking according to the current driving parameters and the braking signal, and communicates with the electronic braking system EBS configured on the trailer through the ISO11992 standard to realize the driving braking of the trailer.

[0039] When the vehicle is in driving state and the central electronic control module 101 fails, the driver drives the brake pedal, the brake pedal is connected to the brake pedal control module 102, the brake pedal control module 102 is connected to the trailer brake module 105 through the air circuit, the brake pedal control module 102 directly controls the trailer brake module 105 to output air pressure to the pneumatic brake system configured for the trailer, thereby realizing the driving braking of the trailer.

[0040] When the vehicle is stationary, the driver operates the parking handle, and the parking handle is connected to the parking handle control module 103. The parking handle control module 103 sends the acquired braking signal to the central electronic control module 101. The central electronic control module 101 calculates the braking force required for braking according to the current vehicle parameters and the braking signal, and controls the trailer parking control module 104 to output air pressure to the control air port of the trailer brake module 105, so that the trailer brake module 105 outputs air pressure to the pneumatic brake system configured for the trailer, thereby realizing the parking brake of the trailer.

[0041] When the central electronic control module 101 cannot work or fails, or the circuit connection between the central electronic control module 101 and the parking handle control module 103 or the brake pedal control module 102 fails, the brake pedal control module 102 can directly output air pressure to the trailer brake module 105, thereby ensuring that the air pressure output of the trailer brake module 105 is in a corresponding proportional relationship with the stroke of the brake pedal pressed by the driver, ensuring that the trailer has basic driving air pressure braking capability, and further improving safety and reliability.

[0042] In an optional embodiment, the central electronic control module 101 can determine the driver's parking intention based on the signal output by the parking handle control module 103, and in combination with the wheel speed signal and the vehicle status, control the trailer parking control module 104 to output air pressure to the control air port of the trailer brake module 105, so that the trailer brake module 105 outputs air pressure to the pneumatic brake system configured for the trailer, thereby realizing the parking brake of the trailer.

[0043] In an optional embodiment, the brake pedal and the brake pedal control module 102 may be connected via a mechanical push rod. The central electronic control module 101 can calculate the braking force required for braking according to the brake signal and in combination with the current wheel speed signal and vehicle parameters. The braking force may include the braking force required for each wheel of the tractor and the braking force required for the trailer.

[0044] The central electronic control module 101 can obtain signals from other electronic control modules, such as the speed and torque of the drive motor, through the vehicle CAN network.

[0045] Reference Manual Attached Figure 3 As shown, in an optional embodiment, the trailer parking control module 104 may include a first solenoid valve 57 and a second solenoid valve 58, and the first solenoid valve 57 and the second solenoid valve 58 may both be two-position three-way solenoid valves. The first air inlet 50 of the first solenoid valve 57 is connected to the vehicle air source, the first air outlet 51 of the first solenoid valve 57 is connected to the second air inlet 52 of the second solenoid valve 58, the second air outlet 53 of the second solenoid valve 58 is connected to the atmosphere, and the first air outlet 51 of the first solenoid valve 57 is connected to the trailer brake module 105. The first electric control terminal 54, the second electric control terminal 55 and the third electric control terminal 56 of the first solenoid valve 57 and the second solenoid valve 58 are electrically connected to the central electric control module 101, respectively.

[0046] Thus, the trailer parking control module 104 and the central electric control module 101 can realize the switching between the parking state and the parking release state, specifically including the following situations:

[0047] When the vehicle needs to be switched from the parking state to the parking release state, the central electronic control module 101 controls the first solenoid valve 57 in the trailer parking control module 104 to open. At this time, the first air inlet 50 of the first solenoid valve 57 is connected to the first air outlet 51 of the first solenoid valve 57, and the first air outlet 51 of the first solenoid valve 57 is connected to the trailer brake module 105. When the air pressure of the first air outlet 51 of the first solenoid valve 57 reaches the first preset value, the parking release state is entered. Therefore, the central electronic control module 101 controls the first solenoid valve 57 so that the trailer parking control module 104 continuously outputs a constant air pressure to the trailer brake module 105 to maintain the trailer in the parking release state.

[0048] When the vehicle needs to be switched from the parking release state to the parking state, the central electronic control module 101 controls the second solenoid valve 58 in the trailer parking control module 104 to open. At this time, the second air inlet 52 of the second solenoid valve 58 and the second air outlet 53 of the second solenoid valve 58 are connected, and the second air outlet 53 of the second solenoid valve 58 is connected to the atmosphere. At this time, the second air inlet 52 of the second solenoid valve 58 is connected to the trailer brake module 105, and the gas in the second air inlet 52 of the second solenoid valve 58 is discharged to the atmosphere. When the air pressure of the second air inlet 52 of the second solenoid valve 58 is consistent with the atmospheric pressure, the parking state is entered.

[0049] In an optional embodiment, the central electronic control module 101 can control the first solenoid valve 57 and the second solenoid valve 58 according to the opening signal obtained from the parking handle by the parking handle control module and the pressure information obtained by the pressure sensor set at the first air outlet 51 of the first solenoid valve 57 in the trailer parking control module 104, so as to achieve linear control of the trailer braking.

[0050] Reference Manual Attached Figure 4 As shown, in an optional embodiment, the trailer brake module 105 includes a third solenoid valve 63, a fourth solenoid valve 64, a fifth solenoid valve 65 and a trailer valve 82, the third air inlet 66 of the third solenoid valve 63 is connected to the brake pedal control module 102 through an air circuit, the third air outlet 67 of the third solenoid valve 63 is connected to the first control air port 41 of the trailer valve 82, the fourth air inlet 68 of the fourth solenoid valve 64 is connected to the air source of the whole vehicle, the fourth air outlet 69 of the fourth solenoid valve 64 is connected to the fifth air inlet 65 of the fifth solenoid valve 65 70 is connected, the fifth air outlet 71 of the fifth solenoid valve 65 is connected to the atmosphere, the fourth air outlet 69 of the fourth solenoid valve 64 is connected to the first control air port 41 of the trailer valve 82, the first control air port 41 and the second control air port 42 of the trailer valve 82 are respectively connected to the brake pedal control module 102 through an air circuit, and the valve body air outlet 22 of the trailer valve 82 outputs air pressure to the brake system set on the trailer to achieve trailer braking; the charging air port 12 of the trailer valve 82 is connected to the trailer air reservoir through an air circuit to supply air to the trailer air reservoir. Therefore, the third solenoid valve 63 can block the air pressure from the brake pedal under the control of the central electronic control module 101, and realize the control of trailer braking through electrical connection.

[0051] In an optional embodiment, the trailer valve 82 in the trailer brake module 105 includes a throttle valve 83, the sixth air inlet 72 of the throttle valve 83 is connected to the air source of the whole vehicle, the sixth air outlet 74 of the throttle valve 83 is connected to the inflation port 12 of the trailer valve 82, the inflation port 12 of the trailer valve 82 is connected to the trailer air cylinder through an air circuit to supply air to the trailer air cylinder; the control port 73 of the trailer valve 82 is connected to the first control air port 41 of the trailer valve 82.

[0052] The charging port 12 of the trailer valve 82 may also be connected to an emergency brake valve 81, which is used to achieve emergency braking of the trailer when the air path connected to the valve body outlet 22 of the trailer valve 82 is broken, thereby further improving the reliability and safety of braking.

[0053] In an optional embodiment, the fourth electric control terminal 59 , the fifth electric control terminal 60 , the sixth electric control terminal 61 and the seventh electric control terminal 62 of the third solenoid valve 63 , the fourth solenoid valve 64 and the fifth solenoid valve 65 are electrically connected to the central electric control module 101 , respectively.

[0054] When the vehicle is driving normally, the air inlet of the trailer valve 82 is connected to the air source of the vehicle through an air path. After the compressed air enters the trailer valve 82 from the air inlet of the trailer valve 82, part of the air pressure therein supplies air to the trailer air reservoir through the charging port 12. At the same time, the gas discharged from the first air outlet 51 of the first solenoid valve 57 in the parking handle control module 103 enters the trailer valve 82 through the air port 43 of the trailer valve 82. At this time, the valve body air outlet 22 of the trailer valve 82 has no air pressure output.

[0055] When the trailer needs service braking, the compressed air output by the brake pedal control module 102 enters the trailer valve 82 through the first control air port 41 and is output to the brake system of the trailer through the valve body air outlet 22 .

[0056] When the first control air port 41 fails, there is no air pressure input to the first control air port 41 . At this time, the compressed air output by the brake pedal control module 102 enters the trailer valve 82 through the second control air port 42 , and is output to the brake system of the trailer through the valve body air outlet 22 .

[0057] When the trailer brake needs to be released, the air pressure in the first control air port 41 and the second control air port 42 drops. At this time, there is no air pressure output from the valve body air outlet 22, and the air pressure in the valve body of the trailer valve 82 is discharged into the atmosphere from the exhaust port 32 of the trailer valve 82.

[0058] When the valve body air outlet 22 fails, the valve body air outlet 22 is connected to the atmosphere. At this time, if the trailer needs to be braked, compressed air enters the trailer valve 82 from the first control air port 41 and the second control air port 42 respectively, and the compressed air in the trailer valve 82 is discharged into the atmosphere through the valve body air outlet 22; at this time, the air pressure of the inflation port 12 of the trailer valve 82 drops. When the air pressure drops to the second preset value, the emergency brake valve 81 connected to the inflation port 12 plays a braking role, and the trailer is braked.

[0059] When the trailer brake is implemented by the parking handle, the air pressure entering the trailer valve 82 through the air port 43 of the trailer valve 82 decreases, and at this time, there is air pressure output at the valve body air outlet 22; when the brake is released by the parking handle, the gas discharged from the first air outlet 51 of the first solenoid valve 57 in the parking handle control module 103 enters the trailer valve 82 through the air port 43 of the trailer valve 82, and at this time, there is no air pressure output at the valve body air outlet 22, and the air pressure in the valve body of the trailer valve 82 is discharged into the atmosphere from the exhaust port 32 of the trailer valve 82.

[0060] This embodiment also shows a vehicle, which is equipped with any one of the above-mentioned electronic mechanical braking systems.

[0061] The beneficial effect of the technical solution provided by the utility model is that, through the setting of the central electronic control module, the trailer parking control module and the trailer braking module, for a trailer equipped with a pneumatic braking system, electrical connection is used to realize the control of the trailer braking, and the electronic mechanical braking and pneumatic braking are combined to solve the matching of the mechanical braking system of the tractor and the pneumatic braking system of the trailer, and the main-trailer compatibility of different trailer control modes is achieved, and the braking requirements under different driving conditions are met. The energy transmission efficiency is higher, and higher control accuracy can be achieved, while the safety and reliability of the braking system are improved.

[0062] The above are only some embodiments of the utility model, which are only used to illustrate the technical solution of the utility model, rather than to limit it. It should be understood that, for ordinary technicians in this field, without departing from the creative concept of the utility model, it can also be improved or replaced according to the above description, and all these improvements and replacements should belong to the protection scope of the claims attached to the utility model. In this case, all details can be replaced by equivalent elements, and the materials, shapes and sizes can also be arbitrary.

Claims

1. An electromechanical braking system, characterized in that: include: Central electronic control module, brake pedal control module, parking handle control module, trailer parking control module and trailer brake module, The central electronic control module is electrically connected to the brake pedal control module, the parking handle control module, the trailer parking control module and the trailer brake module respectively, and the central electronic control module is used to receive the brake signal output by the brake pedal control module or the parking handle control module, calculate the brake parameters, and output the brake command to the trailer parking control module or the trailer brake module; The trailer parking control module and the trailer brake module are connected via an air circuit, and the trailer parking control module can control the air pressure output by the trailer brake module according to the brake command output by the central electronic control module to implement the trailer parking brake; The trailer brake module can output corresponding air pressure according to the brake command output by the central electronic control module to achieve trailer driving brake.

2. An electromechanical brake system according to claim 1, characterized in that: The brake pedal control module is connected to the trailer brake module through an air circuit. The brake pedal control module controls the air pressure output by the trailer brake module according to a brake signal to achieve trailer braking.

3. An electromechanical brake system according to claim 1, characterized in that: When the trailer is equipped with an electronic brake system EBS, the central electronic control module is in communication connection with the electronic brake system EBS, and the electronic brake system EBS receives a brake command output by the central electronic control module to implement trailer braking.

4. An electromechanical brake system according to claim 1, characterized in that: The brake pedal control module is connected to the brake pedal, and the brake pedal control module collects a brake signal and outputs it to the central electronic control module. The central electronic control module calculates the braking force required by the tractor and the trailer based on the brake signal.

5. An electromechanical brake system according to claim 1, characterized in that: The trailer parking control module includes a first solenoid valve and a second solenoid valve, wherein the first air inlet of the first solenoid valve is connected to the air source of the whole vehicle, the first air outlet of the first solenoid valve is connected to the second air inlet of the second solenoid valve, the second air outlet of the second solenoid valve is connected to the atmosphere, and the first air outlet of the first solenoid valve is connected to the trailer brake module.

6. An electromechanical brake system according to claim 5, characterized in that: The trailer brake module includes a third solenoid valve, a fourth solenoid valve, a fifth solenoid valve and a trailer valve. The third air inlet of the third solenoid valve is connected to the brake pedal control module through an air circuit, the third air outlet of the third solenoid valve is connected to the first control air port of the trailer valve, the fourth air inlet of the fourth solenoid valve is connected to the air source of the whole vehicle, the fourth air outlet of the fourth solenoid valve is connected to the fifth air inlet of the fifth solenoid valve, the fifth air outlet of the fifth solenoid valve is connected to the atmosphere, the fourth air outlet of the fourth solenoid valve is connected to the first control air port of the trailer valve, the first control air port and the second control air port of the trailer valve are respectively connected to the brake pedal control module through an air circuit, and the valve body air outlet of the trailer valve outputs air pressure to the brake system provided on the trailer to realize trailer braking; the inflation air port of the trailer valve is connected to the trailer air cylinder through an air circuit to supply air to the trailer air cylinder.

7. An electromechanical brake system according to claim 6, characterized in that: The trailer valve in the trailer brake module includes a throttle valve, the sixth air inlet of the throttle valve is connected to the air source of the whole vehicle, the sixth air outlet of the throttle valve is connected to the inflation port of the trailer valve, the inflation port of the trailer valve is connected to the trailer air cylinder through an air circuit to supply air to the trailer air cylinder; the control port of the trailer valve is connected to the first control air port of the trailer valve.

8. An electromechanical brake system according to claim 6, characterized in that: The air charging port of the trailer valve is connected to an emergency brake valve, and the emergency brake valve is used to achieve emergency braking of the trailer when the air outlet of the valve body of the trailer valve fails.

9. An electromechanical brake system according to claim 6, characterized in that: The electric control ends of the first solenoid valve, the second solenoid valve, the third solenoid valve, the fourth solenoid valve and the fifth solenoid valve are electrically connected to the central electric control module respectively.

10. A vehicle, characterized in that: The vehicle is equipped with an electronic mechanical braking system as described in any one of claims 1-9.

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