A trailer ebs valve module structure and vehicle

Abstract

The present application relates to the field of EBS valve module, disclose a kind of trailer EBS valve module structure, including shell, shell is from top to bottom in turn upper cover, upper valve body (4), middle valve body (5) and lower valve body (7), upper cover and upper valve body (4) between being provided with installation cavity, central controller (1) assembly, pressure reducing solenoid valve (3), pressure increasing solenoid valve (13) and backup pressure solenoid valve (14) are provided in installation cavity, pressure reducing solenoid valve (3), pressure increasing solenoid valve (13) and backup pressure solenoid valve (14) are installed on upper valve body (4), central controller (1) assembly is connected with pressure reducing solenoid valve (3), pressure increasing solenoid valve (13) and backup pressure solenoid valve (14) by wire and transmits control signal to it.This valve module has multiple functions, brake force control is accurate, with anti-rollover function.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of EBS valve module, in particular to a trailer EBS valve module structure. BACKGROUND

[0002] The patent CN202121161779.7 discloses a trailer EBS solenoid valve, which is provided with six electromagnetic coils in the upper valve body. Whether the electromagnetic coils are energized or not controls whether the air path outside the valve body is connected with the air path inside the valve body. The cooperation of the six electromagnetic coils can realize the control of braking in the form of electrically controlled air, so that the braking effect is better and the braking response time is shorter. However, the EBS valve module is only a simple integration of the solenoid valve structure, and does not interact with the controller, so it cannot well execute the intention of the driver. SUMMARY

[0003] In order to solve the above technical problems, the present application solves the problems by the following technical solutions:

[0004] A trailer EBS valve module structure, comprising a shell, the shell is sequentially provided with an upper cover, an upper valve body, a middle valve body and a lower valve body from top to bottom. An installation cavity is arranged between the upper cover and the upper valve body. A central controller assembly, a pressure reducing solenoid valve, a pressure increasing solenoid valve and a backup pressure solenoid valve are arranged in the installation cavity. The pressure reducing solenoid valve, the pressure increasing solenoid valve and the backup pressure solenoid valve are installed on the upper valve body. The central controller assembly is connected with the pressure reducing solenoid valve, the pressure increasing solenoid valve and the backup pressure solenoid valve through wires and transmits control signals to them.

[0005] A chamber is formed between the middle valve body and the lower valve body. A relay valve is installed in the chamber. A sound filter assembly is arranged at the lower end of the lower valve body. The pressure reducing solenoid valve, the pressure increasing solenoid valve and the backup pressure solenoid valve are connected with the relay valve through the air path channels arranged in the middle valve body and the lower valve body.

[0006] An air inlet is arranged on the shell. One air path of the air inlet is connected with an E cavity of the relay valve assembly through a channel H. The other air path is divided into two paths. One path is connected to an air inlet end of the pressure increasing solenoid valve through a G channel. The other path is connected to a pressure sensor through an air guide pipe.

[0007] The backup pressure solenoid valve is connected with a control air port. The backup pressure solenoid valve controls the connection and disconnection of the control air port and the air path inside the valve body. The pressure increasing solenoid valve controls the air flow of the controller air inlet to enter the C cavity of the relay valve.

[0008] The relay piston controls the connection of the E cavity and the D cavity through the valve. The D cavity is connected with each air outlet arranged on the valve body.

[0009] As preferred, the C cavity is communicated with the exhaust port of the relay valve assembly through a pressure reducing electromagnetic valve and a passage B; when the pressure reducing electromagnetic valve is energized and the pressure increasing electromagnetic valve is de-energized, the compressed air in the C cavity is communicated with the outside through the pressure reducing electromagnetic valve, the passage A under the pressure reducing electromagnetic valve, the passage B and the exhaust port of the relay valve assembly.

[0010] As preferred, the EBS valve module comprises two groups of relay valve assemblies, two pressure increasing electromagnetic valves, two pressure reducing electromagnetic valves and two pressure maintaining electromagnetic valves.

[0011] As preferred, the C cavity is located at the upper side of the relay piston, the I cavity is located at the lower side of the pressure increasing electromagnetic valve, the I cavity and the C cavity are connected through a J passage, and the pressure increasing electromagnetic valve controls the communication between the J passage and the I cavity.

[0012] As preferred, a lateral acceleration sensor is arranged on the central controller, and the lateral acceleration sensor is used for detecting the tendency of vehicle rollover.

[0013] As preferred, a wheel speed sensor is further arranged on the central controller, and the wheel speed sensor is used for collecting whether the current wheel of the vehicle wheel is in the state close to lock.

[0014] As preferred, a filter screen is arranged at the air inlet of the vehicle.

[0015] The technical scheme has the following technical effects:

[0016] Compared with foreign products, the structure has the advantages of mature structure, high reliability, stable performance and the like. The technical scheme can realize the functions of brake demand pressure analysis of the trailer, automatic distribution of brake force according to load, brake chamber pressure control, anti-lock braking, anti-rollover control, power saving in parking state, pneumatic redundant braking, brake overload protection, automatic braking, cylinder pressure monitoring and alarm, internal electric control air suspension control and the like. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is a structural schematic view of the valve module.

[0018] Figure 2 is a structural schematic view of the valve module.

[0019] Figure 3 is a structural schematic view of the valve module.

[0020] Figure 4 is a structural schematic view of the valve module.

[0021] The reference signs in the drawings are as follows:

[0022] 1 - Central controller, 2 - Connection line, 3 - Pressure reducing solenoid valve, 4 - Upper valve body, 5 - Middle valve body, 6 - Relay piston, 7 - Lower valve body, 8 - Rubber valve, 9 - Muffler filter, 10 - Pressure sensor, 11 - Air guide pipe, 12 - Air inlet filter screen, 13 - Pressure increasing solenoid valve, 14 - Backup pressure solenoid valve. DETAILED DESCRIPTION

[0023] The application will be further described in detail below in combination with the drawings and examples.

[0024] Example 1

[0025] A trailer EBS valve module structure, comprising a shell, the shell is sequentially provided with an upper cover, an upper valve body 4, a middle valve body 5 and a lower valve body 7 from top to bottom, wherein the upper cover is connected with the upper valve body 4 through screws or buckles, and a mounting cavity is arranged between the upper cover and the upper valve body 4, a central controller 1 assembly, a pressure reducing solenoid valve 3, a pressure increasing solenoid valve 13 and a backup pressure solenoid valve 14 are arranged in the mounting cavity, the pressure reducing solenoid valve 3, the pressure increasing solenoid valve 13 and the backup pressure solenoid valve 14 are installed on the upper valve body 4, and the central controller 1 assembly is connected with the pressure reducing solenoid valve 3, the pressure increasing solenoid valve 13 and the backup pressure solenoid valve 14 through wires and transmits control signals to them.

[0026] The central controller 1 is an integrated circuit board, which is fixed in the mounting cavity through screws, and the space in the mounting cavity can be used for arranging the connection lines 2 connected with the central controller 1 and the solenoid valves, the air outlet connected with the EBS module is four, so the number of the pressure increasing solenoid valve 13, the pressure reducing solenoid valve 3 and the backup pressure solenoid valve 14 in the present scheme is two, and the connection wiring structures are basically the same, and the number of the relay valve assembly relay valves is also two.

[0027] The middle valve body 5 and the lower valve body 7 surround a cavity, and a relay valve is installed in the cavity, the relay valve comprises a relay piston 6, the lower end of the relay piston 6 is provided with a muffler filter 9, and an exhaust passage in the middle of the relay piston 6 is communicated with the atmosphere through the muffler filter 9.

[0028] The EBS valve module is provided with an air inlet, a control gas port and an air outlet connected with a brake cavity, one-way gas path of the air inlet is communicated with the E cavity of the relay valve assembly; another one-way gas path is divided into two paths, one path is connected to the air inlet end of the pressure increasing solenoid valve 13 through a G channel, and the other path is connected to the pressure sensor 10 through an air guide pipe 11; the number of the pressure sensor 10 is five; and the pressure sensor 10 is connected with the air cavity through the air guide pipe 11.

[0029] The backup pressure solenoid valve 14 is connected with the control gas port, and the backup pressure solenoid valve 14 controls the on-off of the control gas port and the internal gas path of the valve body; the pressure increasing solenoid valve 13 can control the gas flow of the air inlet to enter the C cavity of the relay valve.

[0030] The relay piston 6 can control the communication between the E cavity and the D cavity through the valve, and the D cavity is communicated with each gas outlet on the valve body. In the embodiment, the C cavity is communicated with the exhaust port of the relay valve assembly through the pressure reducing electromagnetic valve 3 and the channel B; when the pressure reducing electromagnetic valve 3 is energized and the pressure increasing electromagnetic valve 13 is de-energized, the compressed air in the C cavity passes through the pressure reducing electromagnetic valve 3, then passes through the channel A at the lower end of the pressure reducing electromagnetic valve 3, enters the channel B, and then is communicated with the outside from the exhaust port of the relay valve assembly.

[0031] As can be seen from the above, the EBS valve module comprises two groups of relay valve assemblies, two pressure increasing electromagnetic valves 13, two pressure reducing electromagnetic valves 3, and two pressure standby electromagnetic valves 14.

[0032] Specifically, as shown in the figure, the C cavity is located on the upper side of the relay piston 6, and the I cavity is located on the lower side of the pressure increasing electromagnetic valve 13. The I cavity and the C cavity are connected through the J channel, and the pressure increasing electromagnetic valve 13 controls the communication between the J channel and the I cavity. The central controller 1 is provided with a lateral acceleration sensor, which is used to detect the tendency of the vehicle to roll over.

[0033] In order to ensure the functionality of the EBS valve module, the central controller 1 is further provided with a wheel speed sensor in the embodiment; the wheel speed sensor is used to collect whether the current vehicle wheel is in a near-locking state.

[0034] The air inlet is provided with a filter screen.

[0035] The working process is as follows:

[0036] 1. The brake pressure demand analysis, the brake chamber pressure control is implemented by the following way: the driver's braking requirement will be converted into control air pressure, which is input to the central controller 11 through the wire harness connected to the trailer EBS, and the central controller 1 transmits control signals to the pressure increasing electromagnetic valve 13, the pressure reducing electromagnetic valve 3, and the pressure standby electromagnetic valve 14 through the wire harness. Then the following operations are performed to brake, etc. When the compressed air is filtered through the air inlet filter screen, it enters the relay valve E cavity through a channel H, enters the pressure increasing electromagnetic valve 13 air inlet through a channel G, and enters the pressure sensor 10 through a gas guide pipe 11; when the central controller 1 receives the braking demand of the driver, the pressure standby electromagnetic valve 14 can be controlled to cut off the control air pressure and the pressure increasing electromagnetic valve 13 is energized through the connecting wire 2 connected to the central controller 1. The compressed air can enter the channel J through the channel I of the opened pressure increasing electromagnetic valve 13, and then enter the control cavity C cavity of the module relay valve, so as to press down the relay piston 6, open the valve, and make the compressed air in the air inlet enter the D cavity, so that the D cavity is connected with each brake chamber through the gas outlet, and then enters the spring brake chamber in the whole vehicle brake system to perform the pressure increasing action on the demand pressure, so as to achieve the purpose of braking.

[0037] When the target brake pressure is reached, the central controller 1 acquires the current brake chamber pressure in real time through the pressure sensor 10, and the pressure increasing solenoid valve 13 and the pressure standby solenoid valve 14 are powered off; when the brake pressure exceeds the target brake pressure, the pressure reducing solenoid valve 3 is powered on, the pressure increasing solenoid valve 13 is powered off, the compressed air in the C cavity passes through the pressure reducing solenoid valve 3, then passes through the channel A into the channel B to discharge the atmosphere from the sound-eliminating filter 99, and the follow-up piston 66 is reset, so that the compressed air in the spring brake chamber is discharged from the sound-eliminating filter 99 through the D cavity, thereby realizing the release of the brake.

[0038] 2. The EBS valve module also has an ABS brake lock function: the trailer EBS determines whether the wheels tend to lock through the wheel speed sensors connected to the wheels, and obtains the maximum braking rate and avoids wheel lock through pressure reduction, standby pressure and pressure increase, and the control process and mode are the same as mode 1.

[0039] 3. The trailer EBS detects the tendency of vehicle rollover through the lateral acceleration sensor integrated in the central controller 1, and prevents the occurrence of rollover through braking. The specific control mode is: according to the current wheel speed and load, a lateral acceleration threshold value triggering the tendency of rollover is calculated, when the measured lateral acceleration exceeds the threshold value, a short test brake is performed. If the wheel speed of the inner wheel changes greatly at this time, it indicates that the wheel has been basically off the ground or basically has no load, and the vehicle body has the possibility of rollover. At this time, a higher brake air pressure is applied to the outer wheels of the turning, while the brake air pressure of the inner wheels remains unchanged, so as to reduce the vehicle speed and apply a certain reverse yaw moment to the vehicle body, thereby avoiding rollover. If the inner wheel speed does not decrease significantly after the test brake, the lateral acceleration threshold value is dynamically corrected. The anti-rollover control is only allowed to be activated under the following conditions: the RSS only works when the vehicle speed exceeds 30 km / h, and the RSS function is turned off below the vehicle speed. When the anti-rollover control is working, if a brake request signal pressure or an electrical signal higher than the RSS control pressure appears, the braking is performed according to the higher brake request signal.

[0040] 4. Since the central controller 1 is integrated in the scheme, the EBS valve module assembly can automatically distribute the braking force according to the braking force-load distribution characteristic curve. The reliability and accuracy of the brake are ensured.

[0041] Compared with foreign products, the structure has the advantages of mature structure, high reliability, stable performance, etc. It can realize the functions of brake demand pressure analysis of the trailer, automatic distribution of braking force LSV according to load, brake chamber pressure control, anti-lock braking ABS, anti-rollover control RSS, power saving function in parking state, pneumatic redundant braking, brake overload protection, automatic braking, air cylinder pressure monitoring and alarm, internal electric control air suspension control ECAS, etc.

[0042] Example 2

[0043] The difference between this embodiment and embodiment 1 is that the EBS valve module has four gas outlets.

[0044] Embodiment 3

[0045] Trailer, equipped with the EBS valve module assembly described above.

Claims

1. A trailer EBS valve module structure, characterized by: The shell comprises an upper cover, an upper valve body (4), a middle valve body (5), and a lower valve body (7) from top to bottom, an installation cavity is arranged between the upper cover and the upper valve body (4), a central controller (1) assembly, a pressure reducing electromagnetic valve (3), a pressure increasing electromagnetic valve (13), and a backup pressure electromagnetic valve (14) are arranged in the installation cavity, the pressure reducing electromagnetic valve (3), the pressure increasing electromagnetic valve (13), and the backup pressure electromagnetic valve (14) are installed on the upper valve body (4), and the central controller (1) assembly is connected with the pressure reducing electromagnetic valve (3), the pressure increasing electromagnetic valve (13), and the backup pressure electromagnetic valve (14) through wires and transmits control signals to them; A chamber is formed between the middle valve body (5) and the lower valve body (7), a relay valve is arranged in the chamber, and a sound filter (9) assembly is arranged at the lower end of the lower valve body (7); the pressure reducing electromagnetic valve (3), the pressure increasing electromagnetic valve (13), and the backup pressure electromagnetic valve (14) are connected with the relay valve through the gas path channels arranged in the middle valve body (5) and the lower valve body (7); An air inlet is arranged on the shell, one-way gas path of the air inlet is communicated with an E cavity of the relay valve assembly through a channel H; another-way gas path is divided into two ways, one-way is connected to an air inlet end of the pressure increasing electromagnetic valve (13) through a G channel, and the other-way is connected to a pressure sensor (10) through a gas guide pipe (11); The backup pressure electromagnetic valve (14) is connected with a control air inlet, the backup pressure electromagnetic valve (14) controls the opening and closing of the control air inlet and the internal gas path of the valve body; the pressure increasing electromagnetic valve (13) controls the air flow of the air inlet to enter a C cavity of the relay valve; The relay piston (6) controls the communication between the E cavity and a D cavity, and the D cavity is communicated with each air outlet arranged on the valve body; The C cavity is communicated with an exhaust port of the relay valve assembly through the pressure reducing electromagnetic valve (3) and a channel B; when the pressure reducing electromagnetic valve (3) is powered on and the pressure increasing electromagnetic valve (13) is powered off, the compressed air in the C cavity is communicated with the outside through the pressure reducing electromagnetic valve (3), then passes through the channel A at the lower end of the pressure reducing electromagnetic valve (3), enters the channel B, and then is communicated with the outside from the exhaust port of the relay valve assembly; The C cavity is located on the upper side of the relay piston (6), the I cavity is located on the lower side of the pressure increasing electromagnetic valve (13), the I cavity and the C cavity are connected through a J channel, and the pressure increasing electromagnetic valve (13) controls the communication between the J channel and the I cavity.

2. A trailer EBS valve module structure according to claim 1, characterized in that: The EBS valve module comprises two groups of relay valve assemblies, two pressure increasing electromagnetic valves (13), two pressure reducing electromagnetic valves (3), and two backup pressure electromagnetic valves (14).

3. A trailer EBS valve module structure according to claim 1, characterized in that: A lateral acceleration sensor is arranged on the central controller (1), and the lateral acceleration sensor is used for detecting the tendency of vehicle rollover.

4. A trailer EBS valve module structure according to claim 1, characterized in that: A wheel speed sensor is further arranged on the central controller (1); the wheel speed sensor is used for collecting whether the current wheel of the vehicle wheel is in a near-locking state.

5. A trailer EBS valve module structure according to claim 1, characterized in that: An air inlet filter screen (12) is arranged on the air inlet of the vehicle.

6. Vehicle, characterized in that: The trailer EBS valve module structure of any one of claims 1 to 5 is assembled.

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