Brake system, vehicle and brake system control method

Abstract

The invention belongs to the technical field of vehicle braking control, and discloses a braking system, a vehicle and a braking system control method. The braking system comprises a first air storage cylinder, a relay valve, a main vehicle braking mechanism, a trailer valve, a trailer braking mechanism, a parking hand valve, an electromagnetic valve and an electronic switch, and a first control port of the first air storage cylinder, a first control port of the parking hand valve, a first control port of the electromagnetic valve and a first control port of the relay valve can be communicated to form a main vehicle braking control air path. The first air storage cylinder, the parking hand valve and a second control port of the trailer valve can be communicated to form a trailer braking control air path, the parking hand valve comprises an exhaust port and can enable the first control port and the second control port to be communicated with or disconnected from the exhaust port, and the electronic switch is configured to be capable of controlling on-off of the electromagnetic valve. Therefore, the main vehicle brake control gas circuit is connected or disconnected. According to the braking system, a driver only needs to operate the electronic switch and the parking hand valve to achieve simultaneous braking of the main vehicle and the trailer or independent braking of the trailer, the braking system is simple in structure, and operation difficulty of the driver is small.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle brake control, and in particular to a brake system, a vehicle and a brake system control method. Background Art

[0002] With the development of electronic and intelligent commercial vehicles, trailers often need independent braking to meet user needs. Currently, the parking systems of commercial vehicles usually require a main vehicle mechanical handbrake and a trailer mechanical handbrake. However, due to the increasing number of switches and buttons in the cab, the cab space is very limited. Dual mechanical handbrakes occupy a large amount of cab space. At the same time, the air pressure piping of the dual mechanical handbrake solution is complex and costly.

[0003] In the related art, a pneumatic electronic parking system has been proposed, which realizes the independent braking function of the trailer through six solenoid valves and one pneumatic control valve. However, this solution has a complex structure and is difficult for the driver to operate. Summary of the Invention

[0004] The object of the present invention is to provide a braking system, a vehicle and a braking system control method. The braking system has a simple structure and is easy for the driver to operate.

[0005] To achieve this object, the present invention adopts the following technical solutions:

[0006] In one aspect, a braking system is provided, comprising:

[0007] A first gas storage cylinder, the first gas storage cylinder is used to store gas;

[0008] A relay valve and a main vehicle brake mechanism, wherein the first air reservoir is capable of supplying air to the relay valve, the relay valve being configured to control braking or releasing the main vehicle, and the relay valve being provided with a first control port;

[0009] a trailer valve and a trailer brake mechanism, wherein the first air reservoir is capable of supplying air to the trailer valve, the trailer valve being configured to control braking or releasing the trailer, and the trailer valve being provided with a second control port;

[0010] The braking system also includes: a parking manual valve, a solenoid valve and an electronic switch. The first air reservoir, the parking manual valve, the solenoid valve and the first control port of the relay valve can be connected to form a main vehicle brake control air circuit. The second control port of the first air reservoir, the parking manual valve and the trailer valve can be connected to form a trailer brake control air circuit. The parking manual valve includes an exhaust port, which is configured to be connected to the outside atmosphere. The parking manual valve can connect or disconnect the first control port and the second control port with the exhaust port. The electronic switch is configured to control the on and off of the solenoid valve to connect or disconnect the main vehicle brake control air circuit.

[0011] Preferably, the parking manual valve further includes a first air supply port, a first air delivery port and a second air delivery port, the first air supply port is connected to the first air storage cylinder, the first air delivery port is connected to the solenoid valve, and the second air delivery port is connected to the trailer valve.

[0012] Preferably, the relay valve also includes a second air supply port, a first air outlet and a second air outlet, the main vehicle braking mechanism includes a rear axle right brake spring cylinder and a rear axle left brake spring cylinder, the first control port is connected or disconnected with the exhaust port through a solenoid valve, the second air supply port is connected with the first air storage cylinder, and the first air outlet and the second air outlet are respectively connected with the rear axle right brake spring cylinder and the rear axle left brake spring cylinder.

[0013] Preferably, the trailer valve also includes a third air supply port and a third air outlet port, the trailer brake mechanism includes a trailer brake cylinder, the third air supply port is connected to the first air storage cylinder, the third air outlet port is used to connect to the trailer brake cylinder, and the second control port is used to control the connection or disconnection between the third air supply port and the third air outlet port.

[0014] Preferably, the braking system further includes an air compressor and an air processing unit. The air compressor, the air processing unit and the first air storage cylinder are connected. The air compressor is used to compress air, and the air processing unit is used to filter the air compressed by the air compressor.

[0015] Preferably, the braking system also includes a controller and a pressure sensor. The controller is communicatively connected to the electronic switch, and the electronic switch is communicatively connected to the solenoid valve to control the solenoid valve to be connected or disconnected. The controller is communicatively connected to the solenoid valve to control the on and off of the solenoid valve. The pressure sensor is used to obtain the trailer pressure signal, and the pressure sensor is communicatively connected to the controller.

[0016] In a second aspect, a vehicle is provided, which includes a braking system according to any of the above technical solutions.

[0017] On the third aspect, a braking system control method is provided, which is applied to the above-mentioned braking system. The braking system includes multiple working modes. The braking system control method includes: controlling the opening and closing of the parking hand valve and the electronic switch according to the driver's braking needs, so that the braking system can switch between different working modes.

[0018] Preferably, the different operating modes of the braking system include:

[0019] The electronic switch is turned on, the solenoid valve is in the open state, and the driver controls the parking manual valve to open the exhaust port of the parking manual valve. The gas in the first control port of the relay valve and the second control port of the trailer valve is discharged through the exhaust port of the parking manual valve. There is no air pressure at the air outlet of the relay valve, and air pressure is built up at the third air outlet of the trailer valve. The brake system switches to the first working mode.

[0020] And / or, the electronic switch is turned on, the solenoid valve is in the open state, the driver controls the parking manual valve so that the exhaust port of the parking manual valve is closed, air pressure is established in the second control ports of the relay valve and the trailer valve, air pressure is established in the air outlet of the relay valve, and there is no air pressure in the third air outlet of the trailer valve, and the brake system switches to the second operating mode;

[0021] And / or, the driver presses the electronic switch to close the electronic switch, the solenoid valve is in an open-circuit state, the driver controls the parking manual valve to open the exhaust port of the parking manual valve, the gas in the second control port of the trailer valve is discharged through the exhaust port of the parking manual valve, the gas in the relay valve cavity is in a pressure-maintaining state, the relay valve outlet and the third outlet of the trailer valve are both pressurized, and the brake system switches to the third operating mode;

[0022] And / or, when the electronic switch is in the closed state and the solenoid valve is in the open state, the driver controls the parking manual valve to close the exhaust port of the parking manual valve and open the air outlet of the relay valve. The driver presses the electronic switch to turn on the electronic switch, the solenoid valve is connected, air pressure is established at the first control port of the relay valve and the second control port of the trailer valve, air pressure is established at the air outlet of the relay valve, and there is no air pressure at the third air outlet of the trailer valve, and the braking system switches to the fourth working mode.

[0023] Preferably, after the brake system switches to the third working mode or the fourth working mode, the following steps are further included:

[0024] S1: The pressure sensor obtains the trailer pressure signal;

[0025] S2: The controller determines whether the electronic switch and the solenoid valve need to be automatically reset based on the obtained trailer pressure signal;

[0026] If yes, the controller controls the electronic switch and the solenoid valve to automatically reset; if not, it returns to S1.

[0027] The beneficial effects of the present invention are:

[0028] Provided are a braking system, a vehicle, and a braking system control method. The braking system incorporates a solenoid valve in an air circuit and controls the solenoid valve on and off via an electronic switch, thereby connecting or disconnecting the main vehicle's brake control air circuit and achieving independent braking of the trailer. The driver only needs to operate the electronic switch and the parking hand valve to achieve simultaneous braking of the main vehicle and trailer, or independent braking of the trailer. The braking system has a simple structure and is easy for the driver to operate.

[0029] This braking system utilizes a controller and pressure sensor. Based on the trailer pressure signal, the controller determines whether the electronic switch and solenoid valve need to be automatically reset. If so, the controller automatically resets the electronic switch and solenoid valve. This prevents users from forgetting to reset the electronic switch after pressing it, resulting in operational errors. This reduces driver operational difficulty and enhances braking system safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a structural schematic diagram of the braking system provided by the present invention.

[0031] In the figure: 1, first air storage cylinder;

[0032] 2. Relay valve; 21. First air outlet; 22. Second air outlet; 23. First control port; 24. Second air supply port;

[0033] 3. Trailer valve; 31. Second control port; 32. Third air supply port; 33. Third air outlet; 34. Fourth air supply port

[0034] 4. Parking manual valve; 41. Exhaust port; 42. First air supply port; 43. First air delivery port; 44. Second air delivery port;

[0035] 5. Solenoid valve; 6. Electronic switch; 7. Air compressor; 8. Air handling unit; 9. Controller. DETAILED DESCRIPTION

[0036] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It will be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all structures.

[0037] In the description of the present invention, unless otherwise expressly specified or limited, the terms "connected," "connected," and "fixed" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention in specific circumstances.

[0038] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Furthermore, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0039] In the description of this embodiment, the terms "upper," "lower," "right," and other orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely for ease of description and simplified operation. They do not indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meanings.

[0040] Please refer to Figure 1 On the one hand, this embodiment provides a braking system, including: a first air reservoir 1, a relay valve 2, a main vehicle brake mechanism, a trailer valve 3, a trailer brake mechanism, a parking hand valve 4, a solenoid valve 5 and an electronic switch 6, the first air reservoir 1 is used to store gas; the first air reservoir 1 can supply air to the relay valve 2, the relay valve 2 is configured to control the main vehicle braking or releasing the brake, and the relay valve 2 is provided with a first control port 23; the first air reservoir 1 can supply air to the trailer valve 3, the trailer valve 3 is configured to control the trailer braking or releasing the brake, and the trailer valve 3 includes a second control port 31; the second An air reservoir 1, a parking manual valve 4, and the first control port 23 of the relay valve 2 can be connected to form a main vehicle brake control air circuit. The first air reservoir 1, the parking manual valve 4, and the second control port 31 of the trailer valve 3 can be connected to form a trailer brake control air circuit. The parking manual valve 4 includes an exhaust port 41, which is configured to communicate with the outside atmosphere. The parking manual valve 4 can connect or disconnect the first control port 23 and the second control port 31 with the exhaust port 41. The electronic switch 6 is configured to control the on / off state of the solenoid valve 5 to connect or disconnect the main vehicle brake control air circuit. This arrangement, by adding the solenoid valve 5 to the air circuit and controlling the on / off state of the solenoid valve 5 via the electronic switch 6 to connect or disconnect the main vehicle brake control air circuit, achieves independent braking of the trailer. The driver only needs to operate the electronic switch 6 and the parking manual valve 4 to achieve simultaneous braking of the main vehicle and trailer, or independent braking of the trailer. The braking system has a simple structure and is easy for the driver to operate.

[0041] Specifically, when the parking manual valve 4 moves downward, the exhaust port 41 is opened; when the parking manual valve 4 moves upward, the exhaust port 41 is closed.

[0042] Optionally, the parking manual valve 4 further includes a first air supply port 42 , a first air delivery port 43 and a second air delivery port 44 , the first air supply port 42 is connected to the first air reservoir 1 , the first air delivery port 43 is connected to the solenoid valve 5 , and the second air delivery port 44 is connected to the trailer valve 3 .

[0043] Specifically, when the parking manual valve 4 moves downward, the exhaust port 41 opens, the air path between the first air supply port 43 and the solenoid valve 5 is disconnected, and the air path between the second air supply port 44 and the trailer valve 3 is disconnected; when the parking manual valve 4 moves upward, the exhaust port 41 is closed, the air path between the first air supply port 43 and the solenoid valve 5 is connected, and the air path between the second air supply port 44 and the trailer valve 3 is connected.

[0044] Optionally, the relay valve 2 also includes a second air supply port 24, a first air outlet port 21 and a second air outlet port 22, the main vehicle braking mechanism includes a rear axle right brake spring cylinder and a rear axle left brake spring cylinder, the first control port 23 is connected or disconnected with the exhaust port 41 through the solenoid valve 5, the second air supply port 24 is connected with the first air storage cylinder 1, and the first air outlet port 21 and the second air outlet port 22 are respectively connected to the rear axle right brake spring cylinder and the rear axle left brake spring cylinder. It should be understood that when the parking manual valve 4 moves downward, the exhaust port 41 is exhausted, and there is no pressure in the first air outlet 21 and the second air outlet 22, the energy storage springs of the rear axle right brake spring cylinder and the rear axle left brake spring cylinder release thrust to form braking force, thereby realizing the parking brake of the main vehicle; when the parking manual valve 4 moves upward, the exhaust port 41 of the parking manual valve 4 is closed, and pressure is built up in the first air outlet 21 and the second air outlet 22, the energy storage springs of the rear axle right brake spring cylinder and the rear axle left brake spring cylinder are compressed by air pressure to store energy, thereby releasing the parking brake.

[0045] Optionally, the trailer valve 3 also includes a third air supply port 32 and a third air outlet port 33, the trailer brake mechanism includes a trailer brake cylinder, the third air supply port 32 is connected to the first air storage cylinder 1, the third air outlet port 33 is used to connect to the trailer brake cylinder, and the second control port 31 is used to control the connection or disconnection between the third air supply port 32 and the third air outlet port 33.

[0046] It should be understood that when the parking manual valve 4 moves downward, the gas in the second control port 31 of the trailer valve 3 is discharged through the exhaust port 41. At this time, the air outlet of the trailer valve 3 is connected with the third air supply port 32, and the compressed gas enters the trailer brake cylinder through the air outlet to realize trailer braking; when the parking manual valve 4 moves upward, the exhaust port 41 of the parking manual valve 4 is closed, the second air outlet 22 is connected with the air path of the trailer valve 3, and air pressure is established in the second control port 31 of the trailer valve 3. Under the action of air pressure, the valve core inside the trailer valve 3 moves, cutting off the air path between the third air supply port 32 and the third air outlet 33. There is no air pressure in the third air outlet 33, and then the trailer brake is released.

[0047] In some embodiments, the trailer valve 3 further includes a fourth air supply port 34, and the brake system further includes a second air reservoir (not shown). The fourth air supply port 34 is in communication with the second air reservoir, which is in constant communication with the third air supply port 32. This arrangement allows the second air reservoir to serve as a backup air source for the trailer valve 3, preventing trailer brake failure caused by a malfunction of the first air reservoir 1 and improving the safety and reliability of the brake system.

[0048] Optionally, the braking system further includes an air compressor 7 and an air processing unit 8. The air compressor 7, the air processing unit 8, and the first air reservoir 1 are connected. The air compressor 7 is used to compress air, and the air processing unit 8 is used to filter the compressed air. Specifically, the air processing unit 8 is also equipped with a pressure regulating valve and a pressure limiting valve, allowing the air processing unit 8 to adjust the air pressure in the braking system's air circuit as needed. When the supply pressure reaches the set value of the pressure regulating valve, the pressure regulating valve opens the exhaust port 41 to exhaust excess air, thereby maintaining stable pressure in the air circuit and ensuring stable operation of the braking system.

[0049] Furthermore, the braking system also includes a controller 9 and a pressure sensor. The controller 9 is communicatively connected to the electronic switch 6, and the electronic switch 6 is communicatively connected to the solenoid valve 5 to control the solenoid valve to be connected or disconnected. The controller 9 is communicatively connected to the solenoid valve 5 to control the on and off of the solenoid valve 5. The pressure sensor is used to obtain the trailer pressure signal, and the pressure sensor is communicatively connected to the controller 9.

[0050] Specifically, the controller 9 is a deeply integrated domain controller. It is connected to the electronic switch 6 via the CAN bus. The electronic switch 6 transmits the on / off signal of the solenoid valve 5 via the CAN bus. The controller 9 controls the on / off state of the solenoid valve 5 based on the on / off signal. The pressure sensor acquires the trailer pressure signal and transmits it to the controller 9 via the CAN bus. The solenoid valve 5 and controller 9 are connected via a control circuit. The solenoid valve 5 uses a universal interface, improving the versatility of the braking system for different vehicle models.

[0051] In a second aspect, a vehicle is provided, comprising the above-mentioned braking system. Specifically, the vehicle may be a commercial vehicle, an engineering vehicle, or the like, such as a truck, a tractor, or a forklift.

[0052] A third aspect provides a braking system control method applicable to the aforementioned braking system, which includes multiple operating modes. The braking system control method includes controlling the opening and closing of a parking hand valve 4 and an electronic switch 6 according to the driver's braking requirements to switch the braking system between different operating modes. Based on actual operating conditions and driver needs, the driver can switch the braking system between different operating modes by adjusting the parking hand valve 4 and the electronic switch 6. The braking system has a simple structure and is easy for the driver to operate.

[0053] Specifically, the braking system can switch between four working modes according to the driver's different braking needs. In the first working mode, the braking system can achieve simultaneous braking of the main vehicle and the trailer; in the second working mode, the braking system can achieve simultaneous braking release of the main vehicle and the trailer; in the third working mode, the braking system can achieve independent braking of the trailer; in the fourth working mode, the braking system can achieve independent braking release of the trailer.

[0054] Specifically, the different operating modes of the braking system include:

[0055] The electronic switch 6 is turned on, the solenoid valve 5 is in the open state, and the driver controls the parking manual valve 4 to open the exhaust port 41 of the parking manual valve 4. The gas in the first control port 23 of the relay valve 2 and the second control port 31 of the trailer valve 3 is discharged through the exhaust port 41 of the parking manual valve 4. There is no air pressure at the outlet of the relay valve 2, but air pressure is built up at the third outlet 33 of the trailer valve 3. The brake system switches to the first working mode. At this time, the main vehicle and the trailer are braked at the same time.

[0056] The electronic switch 6 is in the open state, the solenoid valve 5 is in the open state, and the driver controls the parking manual valve 4 to close the exhaust port 41 of the parking manual valve 4. Air pressure is established between the first control port 23 of the relay valve 2 and the second control port 31 of the trailer valve 3. Air pressure is established at the air outlet of the relay valve 2, and there is no air pressure at the third air outlet 33 of the trailer valve 3. The brake system switches to the second working mode. At this time, the brakes of the host vehicle and the trailer are released at the same time.

[0057] The driver presses the electronic switch 6, which is closed and the solenoid valve 5 is disconnected. The driver controls the parking manual valve 4 to open the exhaust port 41 of the parking manual valve 4. The gas in the second control port 31 of the trailer valve 3 is discharged through the exhaust port 41 of the parking manual valve 4. The gas in the cavity of the relay valve 2 is kept under pressure. Air pressure is built up at the air outlet of the relay valve 2 and the third air outlet 33 of the trailer valve 3. The brake system switches to the third working mode. At this time, the trailer can brake independently.

[0058] When the electronic switch 6 is in the closed state and the solenoid valve 5 is in the open state, the driver controls the parking manual valve 4 to close the exhaust port 41 of the parking manual valve 4 and open the air outlet of the relay valve 2. The driver presses the electronic switch 6 to put the electronic switch 6 in the normally open state, the solenoid valve 5 is turned on, and air pressure is established between the first control port 23 of the relay valve 2 and the second control port 31 of the trailer valve 3. Air pressure is established at the air outlet of the relay valve 2, and there is no air pressure at the third air outlet 33 of the trailer valve 3. The braking system switches to the fourth working mode. At this time, the independent brake of the trailer is released.

[0059] Furthermore, the braking system can realize automatic resetting of the electronic switch 6 and the solenoid valve 5 .

[0060] Specifically, after the brake system switches to the third working mode or the fourth working mode, the following steps are further included:

[0061] S1: The pressure sensor obtains the trailer pressure signal;

[0062] S2: The controller 9 determines whether the electronic switch 6 and the solenoid valve 5 need to be automatically reset based on the obtained trailer pressure signal;

[0063] If so, the controller 9 controls the electronic switch 6 and the solenoid valve 5 to automatically reset; if not, the process returns to S1.

[0064] Specifically, when the controller 9 detects that the trailer pressure signal disappears for 5 seconds, the controller 9 controls the electronic switch 6 and the solenoid valve 5 to automatically reset.

[0065] The vehicle further includes a vehicle speed sensor, an accelerator position sensor, and a CAN bus. The CAN bus is capable of transmitting a real-time vehicle speed signal obtained by the vehicle speed sensor and a throttle status signal obtained by the throttle position sensor. S1 further includes: a controller 9 obtaining the real-time vehicle speed signal and throttle status signal via the CAN bus; S2 further includes: the controller 9 determining whether automatic reset of the electronic switch 6 and the solenoid valve 5 is required based on the obtained real-time vehicle speed signal, throttle status signal, and trailer pressure signal.

[0066] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention and are not intended to limit the embodiments of the present invention. A person skilled in the art would be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. A braking system comprising: A first gas storage cylinder (1), wherein the first gas storage cylinder (1) is used to store gas; A relay valve (2) and a main vehicle brake mechanism, wherein the first air reservoir (1) is capable of supplying air to the relay valve (2), the relay valve (2) is configured to control braking or releasing the main vehicle, and the relay valve (2) is provided with a first control port (23); A trailer valve (3) and a trailer brake mechanism, wherein the first air reservoir (1) is capable of supplying air to the trailer valve (3), the trailer valve (3) is configured to control the braking or release of the trailer, and the trailer valve (3) is provided with a second control port (31); The invention is characterized in that the braking system further comprises: a parking manual valve (4), a solenoid valve (5) and an electronic switch (6); the first air reservoir (1), the parking manual valve (4), the solenoid valve (5) and the first control port (23) of the relay valve (2) can be connected to form a main vehicle brake control air circuit; the first air reservoir (1), the parking manual valve (4) and the second control port (31) of the trailer valve (3) can be connected to form a trailer brake control air circuit; the parking manual valve (4) comprises an exhaust port (41), and the exhaust port (41) is configured to be connected to the outside atmosphere; the parking manual valve (4) can connect or disconnect the first control port (23) and the second control port (31) with the exhaust port (41); and the electronic switch (6) is configured to control the on / off of the solenoid valve (5) so as to connect or disconnect the main vehicle brake control air circuit.

2. The braking system according to claim 1, characterized in that The parking manual valve (4) further comprises a first air supply port (42), a first air delivery port (43) and a second air delivery port (44); the first air supply port (42) is in communication with the first air reservoir (1); the first air delivery port (43) is in communication with the solenoid valve (5); and the second air delivery port (44) is in communication with the trailer valve (3).

3. The braking system according to claim 1, characterized in that: The relay valve (2) further comprises a second air supply port (24), a first air outlet port (21) and a second air outlet port (22); the main vehicle brake mechanism comprises a rear axle right brake spring cylinder and a rear axle left brake spring cylinder; the first control port (23) is connected to or disconnected from the exhaust port (41) via the solenoid valve (5); the second air supply port (24) is connected to the first air reservoir (1); the first air outlet port (21) and the second air outlet port (22) are respectively connected to the rear axle right brake spring cylinder and the rear axle left brake spring cylinder.

4. The braking system according to claim 1, wherein: The trailer valve (3) further comprises a third air supply port (32) and a third air outlet port (33); the trailer brake mechanism comprises a trailer brake cylinder; the third air supply port (32) is in communication with the first air reservoir (1); the third air outlet port (33) is used to communicate with the trailer brake cylinder; and the second control port (31) is used to control the connection or disconnection between the third air supply port (32) and the third air outlet port (33).

5. The braking system according to claim 4, characterized in that: The braking system further comprises an air compressor (7) and an air processing unit (8); the air compressor (7), the air processing unit (8) and the first air storage cylinder (1) are connected; the air compressor (7) is used for compressing air; and the air processing unit (8) is used for filtering the air compressed by the air compressor (7).

6. The braking system according to any one of claims 1 to 5, characterized in that: The braking system further comprises a controller (9) and a pressure sensor, wherein the controller (9) is communicatively connected to the electronic switch (6), and the electronic switch (6) is communicatively connected to the solenoid valve (5) to control the solenoid valve to be connected or disconnected, and the controller (9) is communicatively connected to the solenoid valve (5) to control the on / off state of the solenoid valve (5). The pressure sensor is used to obtain a trailer pressure signal, and the pressure sensor is communicatively connected to the controller (9).

7. A vehicle, characterized in that: The vehicle comprises the braking system according to any one of claims 1 to 6.

8. A braking system control method, characterized in that: Applied to a braking system as claimed in any one of claims 1 to 6, the braking system includes a plurality of working modes, and the braking system control method includes: controlling the opening and closing of the parking hand valve (4) and the electronic switch (6) according to the driver's braking demand, so that the braking system switches between different working modes.

9. The brake system control method according to claim 8, characterized in that: The different operating modes of the braking system include: The electronic switch (6) is turned on, the solenoid valve (5) is in a passage state, the driver controls the parking manual valve (4) so that the exhaust port (41) of the parking manual valve (4) is opened, the gas in the first control port (31) of the relay valve (2) and the second control port (31) of the trailer valve (3) is discharged through the exhaust port (41) of the parking manual valve (4), the air outlet of the relay valve (2) has no air pressure, the third air outlet (33) of the trailer valve (3) has air pressure, and the brake system switches to the first working mode; And / or, the electronic switch (6) is turned on, the solenoid valve (5) is in a passage state, the driver controls the parking manual valve (4) so that the exhaust port (41) of the parking manual valve (4) is closed, the relay valve (2) and the second control port (31) of the trailer valve (3) establish air pressure, the air outlet of the relay valve (2) establishes air pressure, the third air outlet (33) of the trailer valve (3) has no air pressure, and the brake system switches to the second working mode; And / or, the driver presses the electronic switch (6) so that the electronic switch (6) is closed, the solenoid valve (5) is in an open circuit state, the driver controls the parking manual valve (4) so that the exhaust port (41) of the parking manual valve (4) is opened, the gas in the second control port (31) of the trailer valve (3) is discharged through the exhaust port (41) of the parking manual valve (4), the gas in the cavity of the relay valve (2) is in a pressure-maintaining state, the air outlet of the relay valve (2) and the third air outlet (33) of the trailer valve (3) both establish air pressure, and the brake system switches to the third working mode; And / or, when the electronic switch (6) is in the closed state and the solenoid valve (5) is in the disconnected state, the driver controls the parking manual valve (4) so that the exhaust port (41) of the parking manual valve (4) is closed and the air outlet of the relay valve (2) is opened, the driver presses the electronic switch (6) so that the electronic switch (6) is in the open state, the solenoid valve (5) is connected, the first control port (23) of the relay valve (2) and the second control port (31) of the trailer valve (3) establish air pressure, the air outlet of the relay valve (2) establishes air pressure, the third air outlet (33) of the trailer valve (3) has no air pressure, and the brake system switches to the fourth working mode.

10. The brake system control method according to claim 9, characterized in that: After the brake system switches to the third working mode or the fourth working mode, the following steps are further included: S1: The pressure sensor obtains a trailer pressure signal; S2: The controller (9) determines whether the electronic switch (6) and the solenoid valve (5) need to be automatically reset based on the obtained trailer pressure signal; If so, the controller (9) controls the electronic switch (6) and the solenoid valve (5) to automatically reset; if not, the process returns to S1.

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