CN215663381U - EPB-fused line control brake system - Google Patents
EPB-fused line control brake system Download PDFInfo
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- CN215663381U CN215663381U CN202120697475.6U CN202120697475U CN215663381U CN 215663381 U CN215663381 U CN 215663381U CN 202120697475 U CN202120697475 U CN 202120697475U CN 215663381 U CN215663381 U CN 215663381U
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Abstract
The utility model provides a brake-by-wire system integrating EPB, wherein a trailer EPB switch is connected with a trailer EPB module, an air inlet of the trailer EPB module is connected with an air source, an air outlet is connected with a pressure sensor, the outer part of the air outlet is connected with a rear axle parking spring air chamber, an air outlet is communicated with the atmosphere, a control port is connected with a control end of a proportional relay valve and is connected with a pressurization electromagnetic valve and a decompression electromagnetic valve, and the air outlet is communicated with the inner part of the control port. According to the utility model, the brake-by-wire of the electronic parking can be realized through the linear EPB switch, and the follow-up control can be realized during emergency braking in the driving process. After the electric control fails, the EPB module can maintain the current state, and the condition of sudden change of the system state cannot occur.
Description
Technical Field
The utility model relates to the technical field of electronic parking brake control of commercial vehicles, in particular to a brake-by-wire system integrating EPB.
Background
Currently, EPB systems for passenger cars have become popular. In China, EPB starts late, the research results of the air brake electronic parking brake technology in China are few at present, and most of EPB still is in the experimental stage. The research on the project in China is small, and the development of the commercial value is much less and less. The scheme of the part in the market applied to the electronic parking system realizes parking through a single switch electromagnetic valve, but the reliability is not high, the requirement of mass production is difficult to meet, the condition of sudden change is easy to generate under the condition that an electric control fails, and the safety factor is extremely poor. Secondly, the linear control function of the system cannot be realized through a single switch electromagnetic valve, follow-up control cannot be met during emergency braking, the effect is not good, and the schemes are used in some pre-research projects and subjects, so that commercialization cannot be really realized. In addition, the scheme in the market at present uses two switch solenoid valves to cooperate with a relay valve to realize the function of pneumatic braking electronic parking, and when the solenoid valves have faults such as air leakage, accidents such as vehicle sliding can be caused, and the scheme also cannot be truly commercialized.
SUMMERY OF THE UTILITY MODEL
In order to overcome the defects of the prior art, the utility model aims to provide a brake-by-wire system integrating EPB, which solves the problems that the conventional EPB system cannot be well popularized to the market for application in a large scale and cannot meet the requirements of mass production and commercial use, can realize linear control on brake strength, can realize follow-up control during emergency braking, and can keep the state of the current system and realize the memory function when an electric control fault occurs.
The utility model provides a brake-by-wire system integrating EPBs (electronic brake systems), which comprises a trailer EPB switch and a trailer EPB module, wherein the trailer EPB switch is connected with the trailer EPB module, the trailer EPB switch is provided with a maximum buckling position and a maximum pushing-down position, an opening stroke is arranged between the maximum buckling position and the maximum pushing-down position, the trailer EPB module comprises an air inlet, an air outlet, a control port, a pressurizing electromagnetic valve, a pressure reducing electromagnetic valve, a pressure sensor and a proportional relay valve, the air inlet is connected with an air source, the air outlet is connected with the pressure sensor, the outside of the air outlet is connected with a rear axle parking spring air chamber, the air outlet is communicated with the atmosphere, the control port is connected with the control end of the proportional relay valve and is connected with the pressurizing electromagnetic valve and the pressure reducing electromagnetic valve, and the pressurizing electromagnetic valve transmits compressed air of the air source connected with the air inlet to the control port, the control port controls the proportional relay valve to output compressed air to the air outlet in proportion, the pressure reducing solenoid valve transmits the compressed air of the air source connected with the air inlet to the control port, the control port controls the proportional relay valve to discharge the compressed air to the atmosphere through the air outlet, and the air outlet is communicated with the inside of the control port.
Further, the air outlet comprises a first air outlet and a second air outlet, the first air outlet is communicated with the inside of the second air outlet, the outside of the first air outlet and the outside of the second air outlet are respectively connected with two parking spring air chambers of the rear axle, and the first air outlet, the second air outlet and the inside of the control port are communicated.
Further, the trailer EPB switch has two-way opening linear stroke signal output.
And further, the two paths of opening degree linear stroke signals form a 2-time proportional relation and are used for checking the validity of signal output, and when the signals are valid, the trailer EPB switch is transmitted to an electric appliance input port of the trailer EPB module through an electric wire.
Compared with the prior art, the utility model has the beneficial effects that:
the utility model provides an EPB (electronic parking brake by wire) integrated brake by wire system, which can realize the brake by wire of electronic parking through a linear EPB switch and can be controlled in a follow-up manner during emergency braking in the driving process. After the electric control fails, the EPB module can maintain the current state, and the condition of sudden change of the system state cannot occur.
The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical solutions of the present invention more clearly understood and to implement them in accordance with the contents of the description, the following detailed description is given with reference to the preferred embodiments of the present invention and the accompanying drawings. The detailed description of the present invention is given in detail by the following examples and the accompanying drawings.
Drawings
The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the utility model and together with the description serve to explain the utility model without limiting the utility model. In the drawings:
FIG. 1 is a schematic diagram of an air path of a brake-by-wire system integrated with an EPB according to the present invention;
FIG. 2 is a schematic view one of the EPB modules of the trailer of the present invention;
FIG. 3 is a schematic view II of a trailer EPB module of the present invention;
FIG. 4 is a schematic diagram of the trailer EPB switch of the present invention;
fig. 5 is a schematic diagram of the trailer EPB module of the present invention.
In the figure: 1. a trailer EPB switch; 11. a maximum buckled position; 12. a maximum push down position; 2. a trailer EPB module; 21. an air inlet; 22. an air outlet; 221. a first air outlet; 222. a second air outlet; 23. an exhaust port; 24. a control port; 3. a pressure sensor; 4. a proportional relay valve; 5. a pressurizing solenoid valve; 6. a pressure reducing solenoid valve.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and the detailed description, and it should be noted that any combination of the embodiments or technical features described below can be used to form a new embodiment without conflict.
A brake-by-wire system integrating EPBs (emergency braking systems) comprises a trailer EPB switch 1 and a trailer EPB module 2, wherein the trailer EPB switch 1 is connected with the trailer EPB module 2, the trailer EPB switch 1 is provided with a maximum buckling position 11 and a maximum pushing-down position 12, an opening stroke is arranged between the maximum buckling position 11 and the maximum pushing-down position 12, the trailer EPB switch 1 is provided with a micro switch output signal and two opening linear stroke signals, the maximum buckling position 11 is the maximum position which can be reached by upwards buckling, and the maximum pushing-down position 12 is the maximum position which can be reached by downwards pushing. The two-way opening linear stroke signal is in a 2-time proportional relation and used for checking the validity of signal output, and when the signal is valid, the trailer EPB switch 1 is transmitted to an electrical appliance input port of the trailer EPB module 2 through an electric wire. The trailer EPB module 2 comprises an air inlet 21, an air outlet 22, an air outlet 23, a control port 24, a pressurization solenoid valve 5, a decompression solenoid valve 6, a pressure sensor 3 and a proportional relay valve 4, wherein the air inlet 21 is connected with an air storage cylinder of a vehicle to obtain an air source, the air outlet 22 is connected with the pressure sensor 3 to monitor parking pressure, the outside of the air outlet 22 is connected with a rear axle parking spring air chamber, the air outlet 23 is communicated with the atmosphere, the control port 24 is connected with a control end of the proportional relay valve 4 and is connected with the pressurization solenoid valve 5 and the decompression solenoid valve 6, the pressurization solenoid valve 5 transmits compressed air of the air source connected with the air inlet 21 to the control port 24, the control port 24 controls the proportional relay valve 4 to output the compressed air to the air outlet 22 according to the proportion, the decompression solenoid valve 6 transmits the compressed air of the air source connected with the air inlet 21 to the control port 24, and the control port 24 controls the proportional relay valve 4 to exhaust the compressed air to the atmosphere through the air outlet 23, thereby realizing that the proportional relay valve 4 discharges the compressed air at the air outlet 22 to the atmosphere. The air outlet 22 and the control port 24 are communicated internally. The trailer EPB switch 1 is used for sending opening information, pressing switch information and pulling switch information operated by a driver to the trailer EPB module 2; the trailer EPB module 2 is used for receiving information of the trailer EPB switch 1 and executing relevant actions.
As shown in fig. 2 and 5, the air outlet 22 includes a first air outlet 221 and a second air outlet 222, the first air outlet 221 and the second air outlet 222 are communicated with each other, the outsides of the first air outlet 221 and the second air outlet 222 are respectively connected with two parking spring air chambers of the rear axle, and the first air outlet 221, the second air outlet 222 and the control port 24 are communicated with each other.
The EPB-integrated brake-by-wire system mainly realizes the following functions:
static electric control starting parking braking:
when the trailer EPB switch 1 is operated upwards and pulled to the bottom (position I), namely the EPB switch is buckled to the maximum position, the trailer EPB module 2 exhausts the compressed air of the first air outlet 221 and the second air outlet 222 which are connected with the parking air chamber of the vehicle to the atmosphere, so that the compression spring of the parking air chamber can be stretched to fix the vehicle.
Static electric control releasing parking braking:
when the trailer EPB switch 1 is operated downwards to be pushed to the bottom (position II), namely the trailer EPB switch 1 is pressed downwards to the maximum position, the trailer EPB module 2 connects the first air outlet 221 and the second air outlet 222 with the air inlet 21, so that the compressed air of the vehicle air storage cylinder can enter the parking air chamber to compress the spring of the parking air chamber, and the parking braking force of the vehicle is released.
Driving process line control emergency braking:
in the running process of the vehicle, the trailer EPB switch 1 is operated to be buckled, the buckling opening degree of the trailer EPB switch 1 is controlled, the parking braking force of the vehicle can be linearly controlled, and the follow-up control effect is achieved. In the process, the larger the opening degree of the switch is, the more compressed air in the first air outlet 221 and the second air outlet 222 is discharged by the trailer EPB module 2, so that the parking braking force is increased, and when the operation switch is reduced, the compressed air in the first air outlet 221 and the second air outlet 222 is filled by the trailer EPB module 2, so that the parking braking force is reduced.
Specifically, the EPB-integrated brake-by-wire system control method comprises the following steps:
parking linear braking step:
and outputting opening degree linear stroke signals, and outputting two paths of opening degree linear stroke signals by the trailer EPB switch 1, wherein the two paths of opening degree linear stroke signals are in a 2-time proportional relation and are used for verifying the effectiveness of signal output. When the output opening degree linear travel signal is verified to be effective, the trailer EPB switch 1 is transmitted to an electric appliance input port of the trailer EPB module 2 through an electric wire.
Receiving an opening linear stroke signal, and after receiving the opening linear stroke signal output by the trailer EPB switch 1, the trailer EPB module 2 controls the pressurizing electromagnetic valve 5 or the depressurizing electromagnetic valve 6 according to the opening of the switch;
parking linear braking, when the parking braking force needs to be increased, the opening degree of the trailer EPB switch 1 is increased, the trailer EPB module 2 receives an instruction of increasing the parking braking force, compressed air of an air source connected with the air inlet 21 is transmitted to the control port 24 through the pressure reducing solenoid valve 6, the control port 24 controls the proportional relay valve 4 to adjust the compressed air to a pressure range corresponding to the opening degree of the trailer EPB switch 1, so that a parking spring is stretched, and the parking braking force is increased; when the parking braking force needs to be reduced, the opening degree of the trailer EPB switch 1 is reduced, the trailer EPB module 2 receives a command of reducing the parking braking force, compressed air of an air source connected with the air inlet 21 is transmitted to the control port 24 through the pressurization electromagnetic valve 5, the control port 24 controls the proportional relay valve 4 to adjust the compressed air to a pressure range corresponding to the opening degree of the trailer EPB switch 1, the parking spring is compressed, and the parking braking force is reduced.
A parking state memory step:
when the vehicle is in a parking releasing state, compressed air is filled into the first air outlet 221 and the second air outlet 222 through the air inlet 21 of the trailer EPB module 2, when air leakage occurs at the control port 24, the compressed air is supplemented to the control port 24 because the first air outlet 221 and the second air outlet 222 inside the trailer EPB module 2 are communicated with the control port 24, so that the state of the trailer EPB module 2 is maintained, the condition that the parking state changes suddenly in the driving process is ensured, and the parking releasing memory function is realized.
When the vehicle is in the start-parking state, the compressed space of the first air outlet 221 and the second air outlet 222 is exhausted to the atmosphere through the air outlet 23 of the trailer EPB module 2, when air leakage occurs at the control port 24, because the first outlet and the second outlet inside the trailer EPB module 2 are communicated with the control port 24, and when the vehicle is in the parking state, the first air outlet 221 and the second air outlet 222 are communicated with the air outlet 23, the compressed air leaked to the control port 24 is exhausted to the atmosphere through the first air outlet 221 and the second air outlet 222 and then through the air outlet 23, so that the state of the trailer EPB module 2 is maintained. Therefore, the parking release state is not generated in the parking process, the vehicle sliding is not guaranteed, and the parking braking memory function is realized.
The foregoing is merely a preferred embodiment of the utility model and is not intended to limit the utility model in any manner; those skilled in the art can readily practice the utility model as shown and described in the drawings and detailed description herein; however, those skilled in the art should appreciate that they can readily use the disclosed conception and specific embodiments as a basis for designing or modifying other structures for carrying out the same purposes of the present invention without departing from the scope of the utility model as defined by the appended claims; meanwhile, any changes, modifications, and evolutions of the equivalent changes of the above embodiments according to the actual techniques of the present invention are still within the protection scope of the technical solution of the present invention.
Claims (4)
1. A brake-by-wire system fused with EPB is characterized in that: the device comprises a trailer EPB switch and a trailer EPB module, wherein the trailer EPB switch is connected with the trailer EPB module, the trailer EPB switch is provided with a maximum buckling position and a maximum pushing-down position, an opening stroke exists between the maximum buckling position and the maximum pushing-down position, the trailer EPB module comprises an air inlet, an air outlet, a control port, a pressurizing electromagnetic valve, a pressure reducing electromagnetic valve, a pressure sensor and a proportional relay valve, the air inlet is connected with an air source, the air outlet is connected with the pressure sensor, the outer part of the air outlet is connected with a rear axle parking spring air chamber, the air outlet is communicated with the atmosphere, the control port is connected with the control end of the proportional relay valve and is connected with the pressurizing electromagnetic valve and the pressure reducing electromagnetic valve, the pressurizing electromagnetic valve transmits compressed air of the air source connected with the air inlet to the control port, the control port controls the proportional relay valve to output the compressed air to the air outlet according to a proportion, the pressure reducing solenoid valve transmits the compressed air of the air source connected with the air inlet to the control port, the control port controls the proportional relay valve to discharge the compressed air to the atmosphere through the air outlet, and the air outlet is communicated with the inside of the control port.
2. The EPB-integrated brake-by-wire system according to claim 1, wherein: the air outlet comprises a first air outlet and a second air outlet, the first air outlet is communicated with the inside of the second air outlet, the outside of the first air outlet and the outside of the second air outlet are respectively connected with two parking spring air chambers of the rear axle, and the first air outlet, the second air outlet and the inside of the control port are communicated.
3. The EPB-integrated brake-by-wire system according to claim 1, wherein: the trailer EPB switch has two-way opening linear travel signal output.
4. The EPB-integrated brake-by-wire system according to claim 3, wherein: and the two paths of opening degree linear stroke signals form a 2-time proportional relation and are used for checking the validity of signal output, and when the signals are valid, the trailer EPB switch is transmitted to an electric appliance input port of the trailer EPB module through an electric wire.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120697475.6U CN215663381U (en) | 2021-04-06 | 2021-04-06 | EPB-fused line control brake system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120697475.6U CN215663381U (en) | 2021-04-06 | 2021-04-06 | EPB-fused line control brake system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215663381U true CN215663381U (en) | 2022-01-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120697475.6U Active CN215663381U (en) | 2021-04-06 | 2021-04-06 | EPB-fused line control brake system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215663381U (en) |
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2021
- 2021-04-06 CN CN202120697475.6U patent/CN215663381U/en active Active
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