CN115431947A - Vehicle redundant braking system - Google Patents
Vehicle redundant braking system Download PDFInfo
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- CN115431947A CN115431947A CN202211056299.3A CN202211056299A CN115431947A CN 115431947 A CN115431947 A CN 115431947A CN 202211056299 A CN202211056299 A CN 202211056299A CN 115431947 A CN115431947 A CN 115431947A
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- Prior art keywords
- brake
- axle
- control unit
- communication data
- data line
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T17/00—Component parts, details, or accessories of power brake systems not covered by groups B60T8/00, B60T13/00 or B60T15/00, or presenting other characteristic features
- B60T17/18—Safety devices; Monitoring
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T1/00—Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles
- B60T1/02—Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles acting by retarding wheels
- B60T1/06—Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles acting by retarding wheels acting otherwise than on tread, e.g. employing rim, drum, disc, or transmission or on double wheels
- B60T1/062—Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles acting by retarding wheels acting otherwise than on tread, e.g. employing rim, drum, disc, or transmission or on double wheels acting on transmission parts
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T17/00—Component parts, details, or accessories of power brake systems not covered by groups B60T8/00, B60T13/00 or B60T15/00, or presenting other characteristic features
- B60T17/18—Safety devices; Monitoring
- B60T17/22—Devices for monitoring or checking brake systems; Signal devices
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- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Valves And Accessory Devices For Braking Systems (AREA)
Abstract
The invention relates to a vehicle redundant braking system, belongs to the technical field of braking, and solves the problems that in the prior art, the redundancy of the braking system still has risks and a vehicle with more than three axles cannot be taken care of. The redundant braking system comprises a braking request device, an axle, a brake and a control unit, wherein a first communication data line is arranged between the axle control unit and the brake; the first communication data line is used for connecting the inside of the axle, a second communication data line is further arranged between the adjacent axles, and the second communication data line is sequentially connected with the control unit and the brake on the axle adjacent to the axle where the control unit is located. The second communication data line is a redundant braking configuration of the first communication data line, each line is sequentially and alternately connected with the control unit and the brake, on the basis of the first communication data line, faults between adjacent axles are tested and improved, the distribution of braking force on the whole vehicle is ensured to be more uniform, and the adjacent axles are enabled to realize more stable and reliable braking.
Description
Technical Field
The invention belongs to the technical field of braking, and particularly relates to a redundant braking system configuration.
Background
The invention patent publication WO2021115827A1 discloses a brake system of a utility vehicle with a first control unit, which first control unit (27) is connected to the brake unit via a bus system (45, 46). The connected electric air wheel (1) connects the service brake chambers (20) of the combined brake cylinders (19) and electronically controls the wheel brake units (1) via the buses (45, 46) to control the combined brake cylinders (19) of the service brake chambers, the pneumatic brake pressures (20) of which are based on the brake request. The second control unit (29) is connected to the electro-pneumatic wheel brake unit (1) via a bus (45, 46) and electrically controls the wheel brake unit (1) via the L-center of the bus system (45, 46) in order to control the pneumatic brake pressure of the combined brake cylinder (19) using the brake chamber (20) on the basis of a brake request.
In the prior art, the bus system (45, 46) is two data transmission lines which are not substantially different, and the bus system is designed to prevent a problem of one line 45 or 46 and then enable the other line to transmit data, so that the redundant design of the brake system is ensured. However, since the data transmission lines provided in the 45 and 46 bus systems are substantially the same in structure, there is still a great risk that the two lines will generate error signals, and therefore, it is necessary to design a redundant brake system that is not formed by two substantially identical transmission lines.
Disclosure of Invention
The invention aims to solve the problems in the prior art and provides a vehicle redundant brake system which uses communication data lines which are not identical.
The purpose of the invention can be realized by the following technical scheme: a redundant braking system of a vehicle comprises a braking request device, axles, brakes and a control unit, wherein the axles comprise first axles, the brakes comprise first brakes on the first axles, the control unit further comprises first axle control units on the first brakes, and first communication data lines are arranged between the first axle control units and the first brakes; the axle further comprises a second axle, the brake further comprises a second brake on the second axle, the control unit further comprises a second axle control unit on the second brake, and a first communication data line is also arranged between the second axle control unit and the second axle controller; the first communication data line is used for being connected inside the axle, when a vehicle braking system has no fault, the first axle control unit and the second axle control unit can respectively obtain braking request signals and can also obtain other signals such as vehicle speed, vehicle weight, steering angle and the like, braking forces required by brakes on wheels on two sides of the axle of the first axle control unit are respectively calculated, and finally, the first communication data line transmits the braking force signals of the first axle control unit to the first brake and transmits the braking force signals of the second axle control unit to the second brake.
And a second communication data line is also arranged between the adjacent axles and is sequentially connected with the control unit and the brake on the axle adjacent to the axle on which the control unit is arranged. The second communication data line is the redundant braking configuration of the first communication data line, and each line is sequentially and alternately connected with the control unit and the brake, so that on the basis of the first communication data line, faults between adjacent axles are verified and improved, the distribution of braking force on the whole vehicle is ensured to be more uniform, and the adjacent axles are enabled to realize more stable and reliable braking.
In the redundant braking system of the vehicle, the axle further includes a third axle, the brake includes a third brake on the third axle, the control unit further includes a third axis control unit on the third brake, and a first communication data line is arranged between the third axis control unit and the third brake; the axle further comprises a fourth axle, the brake comprises a fourth brake on the fourth axle, the control unit further comprises a fourth axle control unit on the fourth brake, and a first communication data line is also arranged between the fourth axle control unit and the fourth brake;
in the vehicle redundant brake system, the vehicle redundant brake system further comprises a third communication data line, and the third communication data line is connected with all the control units. And the third communication data lines are connected with the control units of all the axles, safety redundancy configuration is realized again on the basis of the first communication data lines and the second communication data lines, mutual verification is carried out among the control units of all the axles, and if the control unit of one axle has obvious abnormal conditions, for example, the difference between the calculated braking force and the calculated values of the control units of the other axles is large, the braking signals of the control units of the other axles can be transmitted to the control units of the other axles for use, or the braking of the axle is stopped, and the other axles complete braking. So that after a failure of a single axle or wheel brake or the like on the axle, it can be identified and improved by the third communication data line.
In the redundant braking system of the vehicle, the second communication data line is sequentially and alternately connected with the control unit on the odd axle and the brake on the even axle; and the second communication data line is also sequentially and alternately connected with the control unit on the even axle and the brake on the odd axle. And each line is arranged at intervals, so that the faults between vehicles at intervals can be effectively improved, and the braking force between the axles at intervals is more reliable.
In the redundant brake system of the vehicle, the second communication data line includes a first line, and the first line is connected with the first shaft control unit, the third shaft control unit, the second brake and the fourth brake; the brake further comprises a second line, and the second line is connected with the second shaft control unit, the fourth shaft control unit, the first brake and the third brake. The first line is arranged at intervals with the second line, and the brakes and the control units in all the axles are connected, so that the brakes and the control units cannot be omitted no matter how many axles are, and communication redundancy is realized on the basis of the technology of the first communication data line.
In the redundant braking system of the vehicle, the redundant braking system of the vehicle further comprises a third communication data line, the third communication data line is connected with all the control units, and the third communication data line is connected with all the control units such as the first shaft control unit, the second shaft control unit, the third shaft control unit and the fourth shaft control unit.
In the vehicle redundant brake system, the brake request device may generate a brake request signal for the control unit to receive, and the brake request device may be an automatic brake input device such as a brake pedal, a parking switch, an automatic driving system, or an automatic driving assistance system.
In the above redundant braking system for a vehicle, the control unit is an electronic control unit, and the control unit further includes an energy storage module, and the energy storage module can provide power to the control unit and the brake.
In the redundant braking system of the vehicle, the first communication data line, the second communication data line and the third communication data line are a CAN bus, a flexray bus, an ethernet and the like.
In the above redundant braking system for a vehicle, the brake includes a motor, a controller, a transmission mechanism, a caliper, a brake disc, and the like. The control unit controls the controller, the motor is provided with driving current by the controller, the driving current is transmitted to the calipers through the connection of the transmission mechanism, the speed reduction, the conversion of motion modes and the like, and the calipers are driven by the motor to generate friction with the brake disc to finally realize braking.
Compared with the prior art, the brake system is provided with the second communication data lines which are alternately arranged, so that the redundancy which is not completely the same is ensured to be arranged on the basis of the first communication data lines, the brake system is particularly suitable for being used in vehicles with more than three shafts, and the distribution of the braking force on the whole vehicle is ensured to be more balanced; and a third communication data line is also arranged for detecting whether the difference between the first communication data line and the second communication data line is overlarge or not, so that the third redundancy is ensured, and the probability of failure is reduced.
Drawings
FIG. 1 is a schematic view showing the construction of embodiment 1 of the present invention with only two axles;
fig. 2 is a schematic structural view of embodiment 2 of the present invention having four axles.
In the figure, 1, an axle; 11. a first axle; 12. a second axle; 13. a third axle; 14. a fourth axle; 2. a brake; 21. a first brake; 22. a second brake; 23. a third brake; 24. a fourth brake; 3. a control unit; 31. a first shaft control unit; 32. a second shaft control unit; 33. a third axis control unit; 34. a fourth axis control unit; 4. a first communication data line; 5. a second communication data line; 51. a first line; 52. a second line; 6. a third communication data line.
Detailed Description
The following are specific embodiments of the present invention and are further described with reference to the drawings, but the present invention is not limited to these embodiments.
Specific example 1 is shown in fig. 1: a vehicle redundant brake system comprises a brake request device, an axle 1, a brake 2 and a control unit 3, wherein the axle 1 comprises a first axle 11, the brake 2 comprises a first brake 21 on the first axle 11, the control unit 3 further comprises a first axle control unit 31 on the first brake 21, and a first communication data line 4 is arranged between the first axle control unit 31 and the first brake 21; the brake 2 comprises a second brake 22 on the second axle 12, the control unit 3 comprises a second axle control unit 32 on the second brake 22, and a first communication data line 4 is also arranged between the second axle control unit 32 and the second brake 22; the first communication data line 4 is used for connecting inside the axle 1, when the vehicle brake system is not in failure, the first axle control unit 31 and the second axle control unit 32 can respectively obtain the brake request signal, and can also obtain other signals such as the vehicle speed and the vehicle weight steering angle, etc., respectively calculate the braking force required by the brakes 2 on the wheels on both sides of the axle 1, and finally, the first communication data line 4 transmits the braking force signal of the first axle control unit 31 to the first brake 21, and transmits the braking force signal of the second axle control unit 32 to the second brake 22. A second communication data line 5 is further arranged between the first axle 11 and the second axle 12, the second communication data line 5 is sequentially connected with the control unit 3 and the brake 2 on the axle 1 adjacent to the axle 1 on which the control unit 3 is arranged, and the second communication data line 5 comprises a first line 51 for connecting the first axle control unit 31 and the second brake 22 and a second line 52 for connecting the second axle control unit 32 and the first brake 21. The second communication data line 5 is a redundant braking configuration of the first communication data line 4, each line is sequentially and alternately connected with the control unit 3 and the brake 2, on the basis of the first communication data line 4, faults between the adjacent axles 1 are tested and improved, the distribution of braking force on the whole vehicle is ensured to be more uniform, and the adjacent axles 1 are enabled to realize more stable and reliable braking.
The control device further comprises a third communication data line 6, wherein the third communication data line 6 is connected with all the control units 3, namely the first axis control unit 31 and the second axis control unit 32. The third communication data line 6 is connected with the control units 3 of all the axles 1, safety redundancy configuration is realized again on the basis of the first communication data line 4 and the second communication data line 5, mutual verification is carried out among the control units 3 of all the axles 1, if the control unit 3 of one axle 1 has obvious abnormal conditions, for example, the difference between the calculated braking force and the calculated value of the control units 3 of the other axles 1 is large, the braking signals of the control units 3 of the other axles 1 can be transmitted to the control units 3 of the other axles 1 for use, or the braking of the axle 1 is stopped, and the braking is finished by the other axles 1. So that it can be recognized and improved by the third communication data line 6 after a failure of a single axle 1 or a wheel brake 2 or the like on the axle 1.
The brake request device may generate a brake request signal for the control unit 3 to receive, and the brake request device may be an automatic brake input device such as a brake pedal, a parking switch, or an automatic driving system, an automatic driving assistance system, or the like. The control unit 3 is an electronic control unit 3, and the control unit 3 further comprises an energy storage module which can provide power for the control unit 3 and the brake 2. The first communication data line 4, the second communication data line 5 and the third communication data line 6 are a CAN bus, a flexray bus, an ethernet, etc. The brake 2 comprises a motor, a controller, a transmission mechanism, calipers, a brake disc and the like. The control unit 3 controls the controller, the motor is provided with driving current by the controller, the driving current is transmitted to the calipers through the transmission mechanism for connection, speed reduction, motion conversion and the like, and the calipers are driven by the motor to generate friction with the brake disc to finally realize braking.
The specific example 2 is shown in fig. 2: a vehicle redundant braking system comprises a braking request device, an axle 1, a brake 2 and a control unit 3, wherein the axle 1 comprises a first axle 11, a second axle 12, a third axle 13 and a fourth axle 14, the first axle 11 is provided with a first brake 21 and a first axle control unit 31, and a first communication data line 4 is arranged between the first axle control unit 31 and the first brake 21; a second brake 22 and a second shaft control unit 32 are arranged on the second axle 12, and a first communication data wire 4 is arranged between the second shaft control unit 32 and the second brake 22; a third brake 23 and a third shaft control unit 33 are arranged on the third axle 13, and a first communication data line 4 is arranged between the third shaft control unit 33 and the third brake 23; a fourth brake 24 and a fourth shaft control unit 34 are disposed on the fourth axle 14, and a first communication data line 4 is disposed between the fourth shaft control unit 34 and the fourth brake 24.
The second communication data line 5 is sequentially and alternately connected with the control unit 3 on the odd axle 1 and the brake 2 on the even axle 1; the second communication data line 5 is sequentially and alternately connected with the control unit 3 on the odd axle 1 and the brake 2 on the even axle 1; the second communication data line 5 is also sequentially and alternately connected with the control unit 3 on the even axle 1 and the brake 2 on the odd axle 1. The second communication data line 5 comprises a first line 51, and the first line 51 is connected with the first axis control unit 31, the third axis control unit 33, the second brake 22 and the fourth brake 24; and a second line 52, wherein the second line 52 is connected with the second axle 12 control unit, the fourth axle control unit 34, the first brake 21 and the third brake 23. The first line 51 is arranged at intervals with the second line 52, and the brakes 2 and the control units 3 in all the axles 1 are connected, so that the brakes 2 and the control units 3 cannot be omitted in any number of axles 1, communication redundancy is realized in the technology of the first communication data line 4, faults between vehicles at intervals can be effectively improved, and the braking force between the axles 1 at intervals is more reliable.
The controller further comprises a third communication data line 6, wherein the third communication data line 6 is connected with all the control units 3, and the third communication data line 6 is connected with all the control units 3 such as a first axis control unit 31, a second axis control unit 32, a third axis control unit 33 and a fourth axis control unit 34. The third communication data line 6 is connected with the control units 3 of all the axles 1, safety redundancy configuration is realized again on the basis of the first communication data line 4 and the second communication data line 5, mutual verification is carried out among the control units 3 of all the axles 1, if the control unit 3 of one axle 1 has obvious abnormal conditions, for example, the difference between the calculated braking force and the calculated value of the control units 3 of the other axles 1 is large, the braking signals of the control units 3 of the other axles 1 can be transmitted to the control units 3 of the other axles 1 for use, or the braking of the axle 1 is stopped, and the braking is finished by the other axles 1. It can be identified and improved by the third communication data line 6 after a failure of a single axle 1 or a wheel brake 2 or the like on the axle 1.
The brake request device may generate a brake request signal for the control unit 3 to receive, and the brake request device may be an automatic brake input device such as a brake pedal, a parking switch, or an automatic driving system, an automatic driving assistance system, or the like. The control unit 3 is an electronic control unit 3, and the control unit 3 further comprises an energy storage module which can provide power for the control unit 3 and the brake 2. The first communication data line 4, the second communication data line 5 and the third communication data line 6 are a CAN bus, a flexray bus, an ethernet, etc. The brake 2 comprises a motor, a controller, a transmission mechanism, calipers, a brake disc and the like. The control unit 3 controls the controller, the motor is provided with driving current by the controller, the driving current is transmitted to the calipers through the transmission mechanism for connection, speed reduction, motion conversion and the like, and the calipers are driven by the motor to generate friction with the brake disc to finally realize braking.
The difference between the present embodiment 2 and embodiment 1 is that a third axle 13 and a fourth axle 14 are added, and the connection relationship between the first communication data line 4, the second communication data line 5, and the third communication data line 6 and the axle 1 is expanded.
The working process of the vehicle redundancy system is as follows: after the first shaft control unit 31, the second shaft control unit 32, the third shaft control unit 33 and the fourth shaft control unit 34 receive the braking request signal from the pedal, the control units 3 on the respective axles 1 calculate the braking force required by the respective axles 1, and transmit the braking force to the brakes 2 on the respective axles 1 through the first communication data line 4, so that the respective brakes 2 realize the braking on the respective axles 1; the third communication data line 6 is connected with the control units 3 among all the axles 1, and verifies the braking request signals received by the respective control units 3 and the braking force signals transmitted to the brakes 2 to ensure that the error is within a controllable range; the first line 51 and the second line 52 of the second communication data line 5 are alternately cross-connected with the control unit 3 and the brake 2 on the adjacent axle 1, respectively, so that safety redundancy which is not completely identical with the first communication data line 4 is realized.
The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.
Claims (7)
1. A redundant braking system for a vehicle, comprising a braking request device, an axle (1), brakes (2) and a control unit (3), characterized in that: the axle (1) comprises a first axle (11), the brake (2) comprises a first brake (21) on the first axle (11), the control unit (3) further comprises a first axle control unit (31) on the first brake (21), and a first communication data line (4) is arranged between the first axle control unit (31) and the first brake (21); the axle (1) further comprises a second axle (12), the brake (2) further comprises a second brake (22) on the second axle (12), the control unit (3) further comprises a second axle control unit (32) on the second brake (22), and a first communication data line (4) is also arranged between the second axle control unit (32) and the second brake (22); still be equipped with second communication data line (5) between adjacent axletree (1), second communication data line (5) connect gradually control unit (3) and with brake (2) on axletree (1) that control unit (3) place is adjacent.
2. The vehicle redundant brake system according to claim 1, wherein: the axle (1) further comprises a third axle (13), the brake (2) comprises a third brake (23) on the third axle (13), the control unit (3) further comprises a third axle control unit (33) on the third brake (23), and a first communication data line (4) is arranged between the third axle control unit (33) and the third brake (23); the axletree still include fourth axletree (14), the stopper include fourth brake (24) on fourth axletree (14), control unit (3) still include fourth axle control unit (34) on fourth brake (24), fourth axle control unit (34) and fourth brake (24) between also be equipped with first communication data line (4).
3. The vehicle redundant brake system according to claim 1 or 2, characterized in that: the car axle is characterized in that a third communication data line (6) is further arranged between the car axles (1), and the third communication data line (6) is connected with all the control units (3).
4. The vehicle redundant brake system according to claim 1, wherein: the second communication data line (5) is sequentially and alternately connected with the control unit (3) on the odd axle (1) and the brake (2) on the even axle (1); the second communication data line (5) is also sequentially and alternately connected with the control unit (3) on the even axle (1) and the brake (2) on the odd axle (1).
5. The vehicle redundant brake system according to claim 2, wherein: the second communication data line (5) is sequentially and alternately connected with the control unit (3) on the odd axle (1) and the brake (2) on the even axle (1); the second communication data line (5) is also sequentially and alternately connected with the control unit (3) on the even axle (1) and the brake (2) on the odd axle (1).
6. The vehicle redundant brake system according to claim 5, wherein: the second communication data line (5) comprises a first line (51), and the first line (51) is connected with the first shaft control unit (31), the third shaft control unit (33), the second brake (22) and the fourth brake (24); the brake further comprises a second line (52), and the second line (52) is connected with the second shaft control unit (32), the fourth shaft control unit (34), the first brake (21) and the third brake (23).
7. The vehicle redundant brake system according to claim 2, wherein: still contain third communication data line (6), third communication data line (6) connect above-mentioned all the control unit (3), third communication data line (6) connect first axle the control unit (31), second axle the control unit (32), third axle the control unit (33) and fourth axle the control unit (34) all the control unit (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211056299.3A CN115431947A (en) | 2022-08-30 | 2022-08-30 | Vehicle redundant braking system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211056299.3A CN115431947A (en) | 2022-08-30 | 2022-08-30 | Vehicle redundant braking system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115431947A true CN115431947A (en) | 2022-12-06 |
Family
ID=84245212
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211056299.3A Pending CN115431947A (en) | 2022-08-30 | 2022-08-30 | Vehicle redundant braking system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115431947A (en) |
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2022
- 2022-08-30 CN CN202211056299.3A patent/CN115431947A/en active Pending
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