CN114291062A - Brake-by-wire system, brake-by-wire method and vehicle comprising brake-by-wire system - Google Patents
Brake-by-wire system, brake-by-wire method and vehicle comprising brake-by-wire system Download PDFInfo
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- CN114291062A CN114291062A CN202111650385.2A CN202111650385A CN114291062A CN 114291062 A CN114291062 A CN 114291062A CN 202111650385 A CN202111650385 A CN 202111650385A CN 114291062 A CN114291062 A CN 114291062A
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Abstract
The application provides a brake-by-wire system, a brake-by-wire method and a vehicle comprising the brake-by-wire system, wherein the system comprises: the electronic brake control module comprises a front electronic brake control module and a rear electronic brake control module, the electric brake power assisting unit comprises a front electric brake power assisting unit and a rear electric brake power assisting unit, the electronic valve assembly comprises a front electronic valve assembly and a rear electronic valve assembly, wherein the front electronic brake control module is communicably connected to the front electronic valve assembly, the rear electronic brake control module is communicably connected to the rear electronic valve assembly, and the front electronic brake control module and the rear electronic brake control module are both communicably connected with the front electric brake power assisting unit and the rear electric brake power assisting unit. Redundant drive-by-wire braking of double chips is realized, and the braking safety and reliability are improved.
Description
Technical Field
The present invention relates to a brake-by-wire technology, and more particularly, to a brake-by-wire system for a vehicle, a brake-by-wire method, and a vehicle including the brake-by-wire system.
Background
In the technical field of automatic driving, the L4 level automatic driving must have electronic redundancy and cannot rely on mechanical redundancy alone, otherwise, a driver is required to be caught in a mud pool with division of responsibility in a short time for managing the vehicle. The existing bert brake-by-wire system has mature and complete ABS (antilock brake system), ESP (electronic vehicle body stability system), EPB (electronic parking system) technologies, wherein the EPB technology is used as electronic redundancy for brake-by-wire. For example, the continental OneBox (smart integrated brake system) solution that meets the above-L3 autopilot requirement integrates MKC1 and redundant system MK100HBE into the same box. If the main brake system completely fails, the MK100HBE unit brakes the automobile by using two front wheels to play a role of an anti-lock brake system; the OneBox scheme is introduced by Bose on the basis of the iBooster, namely, the functions of the iBooster and the ESP are integrated to obtain a highly integrated product IPB, and meanwhile, the IPB is provided with a RBU as braking redundancy. Through the integration scheme, a double-safety failure mode of mechanical redundancy and electronic redundancy is realized.
In existing vehicles, when the bert-ley brake-by-wire system fails, a braking request of the vehicle is generally performed by the EPB. When the vehicle runs at a high speed, if the brake-by-wire system fails, when the EPB is used to execute a braking request of the vehicle, the rear wheels of the vehicle are easily locked, so that the vehicle is out of control, and a traffic accident is caused.
Disclosure of Invention
The present application has been made in view of the above-mentioned drawbacks of the existing brake-by-wire system in an autonomous vehicle of level L4 or higher, and an object of the present application is to provide a brake-by-wire system, a brake-by-wire method, and a vehicle including the brake-by-wire system, which implement control redundancy through dual-chip control, so that front and rear brake systems are mutually redundant, thereby improving the braking safety and reliability of the entire brake-by-wire system, and can be widely applied to vehicles of level L4 or higher.
The purpose of the application is realized by adopting the following technical scheme:
in a first aspect, the present application provides a line control actuation system, comprising: a vehicle information detection unit, a pedal mechanism assembly, an electric brake power assisting unit, an electronic valve assembly, an electronic brake control module and a brake, wherein the electronic brake control module comprises a front electronic brake control module and a rear electronic brake control module, the electric brake power-assisted unit comprises a front electric brake power-assisted unit and a rear electric brake power-assisted unit, the electronic valve assembly comprises a front electronic valve assembly and a rear electronic valve assembly, and the brakes include a left front brake, a right front brake, a left rear brake and a right rear brake, wherein the front electronic brake control module is communicatively coupled to the front electronic valve assembly and the rear electronic brake control module is communicatively coupled to the rear electronic valve assembly, and wherein the front and rear electronic brake control modules are both communicably connected with the front and rear electric brake booster units.
With this embodiment, the following technical effects can be obtained: control redundancy is realized through double-chip control, so that front and rear braking systems are redundant with each other, and the braking safety and reliability of the whole brake-by-wire system are improved.
As an embodiment, the brake-by-wire system further comprises: the brake system comprises a front brake master cylinder, a rear brake master cylinder, a front brake oil can and a rear brake oil can, wherein the front electronic valve assembly comprises a front hydraulic control unit for controlling the front brake master cylinder, and the rear electronic valve assembly comprises a rear hydraulic control unit for controlling the rear brake master cylinder.
With this embodiment, the following technical effects can be obtained: the redundant arrangement of front and rear brake components is realized, and the brake safety of the brake-by-wire system is improved.
As an embodiment, the brake-by-wire system further comprises an electronic parking brake control module.
With this embodiment, the following technical effects can be obtained: the electronic parking brake control module can be used for further carrying out redundant electronic brake control, and the electronic brake and the mechanical brake are combined, so that the brake safety of the brake-by-wire system is improved.
As one embodiment, the vehicle information detecting unit includes a brake pedal position sensor, a brake line pressure sensor, a vehicle speed sensor, a wheel speed sensor, and a yaw rate sensor.
With this embodiment, the following technical effects can be obtained: the vehicle information is detected by utilizing the sensors, so that various information can be provided for vehicle braking, and the data accuracy of the brake-by-wire system is improved.
As an embodiment, the brake-by-wire system further comprises: a normally closed solenoid valve connected between the pipeline of the front hydraulic control unit and the pipeline of the rear hydraulic control unit.
With this embodiment, the following technical effects can be obtained: through the normally closed electromagnetic valve, the front and back intercommunication of the brake-by-wire system can be realized, and under the condition that the electric brake power assisting unit on one side fails, the power assisting unit still provides power for the failed side, so that the reliability of the brake-by-wire control is improved.
A second aspect provides a brake-by-wire method comprising determining whether there is a failure fault with the electric brake booster unit and the electronic brake module of the brake-by-wire system; and executing normal braking when it is determined that the failure fault does not exist, and executing abnormal braking when it is determined that the failure fault exists in any one of the electronic brake module and the electric brake assist unit.
With this embodiment, the following technical effects can be obtained: even if failure fault exists, abnormal braking can be performed through the braking redundancy design of the system, and the safety of system braking control is improved.
As one embodiment, the performing normal braking includes: the front electronic brake control module and the rear electronic brake control module receive the vehicle running information sent from the vehicle information detection unit or an instruction sent from a vehicle control unit, calculate required brake pressure of each brake pipeline, and send a control instruction including the required brake pressure to the front electric brake power-assisting unit and the rear electric brake power-assisting unit and the front electronic valve assembly and the rear electronic valve assembly, so as to adjust the pressure of each brake pipeline to the required brake pressure and control each actuator to brake.
With this embodiment, the following technical effects can be obtained: the control redundancy can be realized through the double-chip control, so that the control redundancy can be widely applied to L4-grade vehicles, the braking safety and reliability of the brake-by-wire control are improved, and the full redundancy of the brake-by-wire control is realized.
As one embodiment, the sending of the control command by the front electronic brake control module and the rear electronic brake control module includes: the front electronic brake control module sends the control instruction to the front electric brake power assisting unit and the front electronic valve assembly to adjust the pressure of a front brake pipeline and control the left front brake and the right front brake to brake, and the rear electronic brake control module sends the control instruction to the rear electric brake power assisting unit and the rear electronic valve assembly to adjust the pressure of a rear brake pipeline and control the left rear brake and the right rear brake to brake.
With this embodiment, the following technical effects can be obtained: in the case of normal braking, braking stability is improved by performing braking control independently of each other in the front and rear.
As one embodiment, the performing the abnormal braking includes: when it is determined that one of the front electronic brake control module and the rear electronic brake control module is out of order, the other of the front electronic brake control module and the rear electronic brake control module sends the control command to the front electric brake assist unit and the rear electric brake assist unit.
With this embodiment, the following technical effects can be obtained: through the redundant arrangement of the electronic brake control modules, even if one electronic brake control module fails, the electronic brake control modules which do not fail can be used for realizing front and back braking, so that the safety and the stability of the whole brake-by-wire system are improved.
As one embodiment, the performing the abnormal braking includes: when the front electric brake assisting unit is judged to be invalid, the front electric brake control module and the rear electric brake control module send the control instruction to the rear electric brake assisting unit and the front electronic valve assembly and the rear electronic valve assembly; and when the rear electric brake assisting unit is judged to be invalid, the front electric brake control module and the rear electric brake control module send the control command to the front electric brake assisting unit and the front electronic valve assembly and the rear electronic valve assembly.
With this embodiment, the following technical effects can be obtained: through the redundant arrangement of the electric brake assisting units, even if one electric brake assisting unit fails, the electric brake assisting unit which does not fail can be used for providing assisting power for braking, so that the braking can still be carried out, and the safety and the reliability of the braking control of the brake-by-wire system are improved.
As one embodiment, the performing the abnormal braking includes: when the front electric brake assisting unit is judged to be invalid, the normally closed electromagnetic valve is opened so as to provide assisting power for the front brake main cylinder by using the rear electric brake assisting unit; and wherein when it is determined that the rear electric brake assist unit is failed, the normally closed electromagnetic valve is opened to provide assist to the rear master cylinder with the front electric brake assist unit.
With this embodiment, the following technical effects can be obtained: through setting up normally closed solenoid valve, can realize the intercommunication around the brake-by-wire system, under the condition that one side electric brake helping hand unit became invalid, still provide the helping hand for the side that became invalid through the electric brake helping hand unit that does not become invalid to the reliability of brake-by-wire control has been improved.
In a third aspect, the present application provides a vehicle comprising a brake-by-wire system according to the first aspect.
Drawings
The present application is further described below with reference to the drawings and examples.
Fig. 1 is a block diagram of a wire-controlled power system according to an embodiment of the present disclosure;
FIG. 2 is a block diagram of another brake-by-wire system provided in the embodiments of the present application;
FIG. 3 is a schematic illustration of a wire control actuation method provided by an embodiment of the present application;
FIG. 4 is a schematic flow chart of another brake-by-wire method provided by the embodiment of the application; and
fig. 5 is a schematic flowchart of a wire control actuation method according to an embodiment of the present application.
Detailed Description
The present application is further described with reference to the accompanying drawings and the detailed description, and it should be noted that, in the present application, the embodiments or technical features described below may be arbitrarily combined to form a new embodiment without conflict.
A brake-by-wire system is provided, and an embodiment of the brake-by-wire system of the present application will be described below with reference to fig. 1 and 2.
[ example 1]
Referring to fig. 1, an embodiment 1 of a brake-by-wire system according to the present application includes a vehicle information detection unit, a pedal mechanism assembly, an electric brake assist unit, an electronic valve assembly, an electronic brake control module, a brake, a master cylinder, and a brake oil can.
The vehicle information detection unit includes, among others, brake pedal position sensors 22 and 23, a brake line pressure sensor, a vehicle speed sensor 24, a steering wheel angle sensor 25, a yaw rate sensor 26, and wheel speed sensors 21FL, 21FR, 21RL, and 21 RR. These sensors are used to detect vehicle travel information and send the detected vehicle travel information to an electronic brake control module, which will be described later.
The pedal mechanism assembly is used for being stepped on by a user to swing when the user desires to brake, and then the swing is detected by the brake pedal position sensor to generate a brake signal.
The electric brake assist unit includes a front electric brake assist unit 33 and a rear electric brake assist unit 43 for providing assist to a master cylinder described later. The electronic valve assembly includes a front electronic valve assembly and a rear electronic valve assembly. Electronic valve assemblies are a generic term for valves in, for example, ABS/ESP assemblies.
The electronic brake control module includes a front electronic brake control module 20 and a rear electronic brake control module 40, as shown in fig. 1, the front electronic brake control module 20 is communicably connected with the rear electronic brake control module 40, and both the front electronic brake control module 20 and the rear electronic brake control module 40 are connected with the vehicle information detection unit to be able to receive vehicle travel information from the vehicle information detection unit. Also, referring to fig. 1-3, front electronic brake control module 20 is communicably connected to front electric brake assist unit 33, front electronic valve assembly, and rear electric brake assist unit 43; the rear electronic brake control module 40 is communicably connected to the rear electric brake booster unit 43, the rear electronic valve assembly, and the front electric brake booster unit 33.
The master cylinder includes a front master cylinder 32 and a rear master cylinder 42. The brake oil reservoir includes a front brake oil reservoir 34 and a rear brake oil reservoir 44. The brakes include a left front brake 31L, a right front brake 31R, a left rear brake 41L, and a right rear brake 41R.
And as shown in fig. 1, the front electronic valve assembly includes a front hydraulic control unit as a front electronic valve assembly component that controls the front master cylinder 32, and the rear electronic valve assembly includes a rear hydraulic control unit as a rear electronic valve assembly component that controls the rear master cylinder 42. The front electric brake booster unit 33 provides boosting to the front master cylinder 32, and the rear electric brake booster unit 43 provides boosting to the rear master cylinder 42.
In addition, the brake-by-wire system of the present embodiment further includes an electronic parking brake control module 50, which may include a left electronic parking brake control unit 51 and a right electronic parking brake control unit 52 (not shown in the drawings).
By utilizing the brake-by-wire system of the embodiment, a redundant brake-by-wire system with double chips is realized, so that the front brake system and the rear brake system are mutually redundant, and the braking safety and reliability of the whole brake-by-wire system are improved.
[ example 2]
As embodiment 2 of the brake-by-wire system of the present application, referring to fig. 2, the brake-by-wire system of embodiment 2 has substantially the same configuration as that of embodiment 1, except that the brake-by-wire system of embodiment 2 further includes a normally closed electromagnetic valve 45 connected between the piping of the front hydraulic control unit and the piping of the rear hydraulic control unit through a connecting piping such that when the normally closed electromagnetic valve 45 is opened, the piping of the front hydraulic control unit is connected to the rear master cylinder, and the piping of the rear hydraulic control unit is connected to the front master cylinder.
In light of the foregoing, embodiment 2 differs from embodiment 1 in that whether or not the front and rear brake lines are communicated, and in this embodiment (embodiment 2), the front and rear brake lines are communicated through the connecting line, and when the entire brake-by-wire system is operating normally, the normally closed electromagnetic valve 45 is shut off to disconnect the connecting line; when one of the front electric brake assist unit and the rear electric brake assist unit fails, the normally closed solenoid valve 45 is opened to connect the connection line.
Therefore, the normally closed electromagnetic valve can realize the front-back intercommunication of the brake-by-wire system, and still provide assistance for the failed side under the condition that the electric brake assistance unit on one side fails, thereby improving the reliability of the brake-by-wire control.
Having described the brake-by-wire system according to the embodiment of the present application, an embodiment of a brake-by-wire method using the above brake-by-wire system will be described below.
[ example 3]
Referring to fig. 4, the brake-by-wire method according to embodiment 3 of the present application uses the brake-by-wire system according to embodiment 1, and the brake-by-wire method according to this embodiment includes the following steps S101 and S102:
step S101, failure determination step.
And judging whether failure faults occur in an electronic brake control module and an electric brake power assisting unit in the linear control system.
Step S102, braking step.
When it is determined that the failure fault does not exist, normal braking is performed, and when it is determined that one of the electronic brake module and the electric brake assist unit has the failure fault, abnormal braking is performed.
As an example, referring to fig. 4, step S102 includes the following steps S201 to S203.
Step S201, normal braking step.
Step S201 is executed when it is determined that the by-wire control system has no failure fault. That is, when the brake-by-wire system is normally operated, the front and rear electronic brake control modules 20 and 40 receive vehicle travel information transmitted from the vehicle information detection unit or a command transmitted from the vehicle controller, calculate a required brake pressure of each brake line, and transmit a control command including the required brake pressure to the front and rear electric brake servo units 33 and 43 and the front and rear electronic valve assemblies to adjust the pressure of each brake line to the required brake pressure and control each actuator to brake at the required brake pressure.
Specifically, the front electronic brake control module 20 sends a control command to the front electric brake boosting unit 33 and the front electronic valve assembly to adjust the pressure of the front brake pipe and control the left front brake and the right front brake to brake, and the rear electronic brake control module 40 sends the control command to the rear electric brake boosting unit 43 and the rear electronic valve assembly to adjust the pressure of the rear brake pipe and control the left rear brake and the right rear brake to brake.
And S202, an electronic brake control module failure step.
Step S202 is executed when it is determined that there is a failure in the electronic brake control module.
That is, when it is determined that one of the front electronic brake control module 20 and the rear electronic brake control module 40 fails, the other one of the front electronic brake control module 20 and the rear electronic brake control module 40 sends a control command to the front electric brake assist unit 33 and the rear electric brake assist unit 43 and the corresponding front electronic valve assembly or rear electronic valve assembly.
Specifically, when it is determined that the front electronic brake control module 20 is disabled, the rear electronic brake control module 40 receives vehicle driving information transmitted from a vehicle information detection unit or a command transmitted from a VCU (vehicle control unit), calculates a required brake pressure of each brake line, transmits a control command to the front electric brake assist unit, the rear electric brake assist unit, and the rear ABS/ESP electronic valve assembly, controls each brake line pressure, and performs a vehicle braking function.
On the other hand, when it is determined that the rear electronic brake control module 40 is out of order, the front electronic brake control module 20 receives vehicle travel information transmitted from the vehicle information detection unit or a command transmitted from a VCU (vehicle control unit), calculates a required brake pressure of each brake line, transmits a control command to the front electric brake assist unit, the rear electric brake assist unit, and the front ABS/ESP electronic valve assembly, controls each brake line pressure, and performs a vehicle braking function.
And step S203, a first electric brake assisting unit failure step.
Step S203 is executed when it is determined that the electric brake assist unit has a failure.
That is, when it is determined that the front electric brake assist unit 33 is out of service, the front and rear electric brake control modules 20 and 40 send control commands to the rear electric brake assist unit 43 and the front and rear electronic valve assemblies; and when the rear electric brake assist unit 43 fails, the front and rear electronic brake control modules 20 and 40 send control commands to the front electric brake assist unit 33 and the front and rear electronic valve assemblies.
Specifically, when it is determined that the front electric brake assist unit 33 is disabled, the front and rear electronic brake control modules 20 and 40 receive the vehicle traveling information transmitted from the vehicle information detection unit or the command transmitted from the VCU, calculate the required brake pressure of the brake pipe of each wheel, and transmit a control command to the rear electric brake assist unit 43 and the front and rear ABS/ESP electronic valve assemblies to control each brake pipe pressure to perform the vehicle braking function.
Because the front electronic valve assembly and the rear electronic valve assembly are electronic valve assemblies with ESPs and are provided with pressure increasing valves, certain pressure can be provided for a brake pipeline, and therefore, although the front electric brake power assisting unit 33 fails, the front wheel brake can still be realized by utilizing the front ABS/ESP electronic valve assembly.
When it is determined that the rear electric brake assist unit 43 is disabled, the front and rear electronic brake control modules 20 and 40 receive the vehicle driving information transmitted from the vehicle information detection unit or the command transmitted from the VCU, calculate the required brake pressure of the brake pipe of each wheel, and transmit a control command to the front electric brake assist unit 33 and the front and rear ABS/ESP electronic valve assemblies to control each brake pipe pressure to perform the vehicle braking function.
Because the front and rear electronic valve assemblies are electronic valve assemblies with ESPs and are provided with pressure increasing valves, certain pressure can be provided for a brake pipeline, and although the electric brake power assisting unit 43 fails, the rear wheel brake can still be realized by utilizing the rear ABS/ESP electronic valve assembly.
By utilizing the steps S201-S203, the brake-by-wire under the failure condition can be executed under the condition that any one of the electronic brake module and the electric brake power assisting unit has the failure fault, so that the effect of redundant braking is fully exerted, and the safety and the reliability of the whole brake-by-wire control are improved.
The above describes an embodiment of the brake-by-wire method according to the present application, by which control redundancy can be achieved through dual-chip control, thereby being widely applied to vehicles of level L4, improving braking safety and reliability of the brake-by-wire control, and achieving full redundancy of the brake-by-wire control.
[ example 4]
Referring to fig. 5, another embodiment of the brake-by-wire method according to the present application, that is, embodiment 4, differs from the brake-by-wire method of embodiment 3 only in that the brake-by-wire method of the present embodiment utilizes the brake-by-wire system of embodiment 2 and includes step S301 instead of step S203 in embodiment 3, and step S301 will be described in detail below.
And S301, a second electric brake assisting unit failure step.
When it is determined that the front electric brake assist unit is out of service, the normally closed electromagnetic valve 45 is opened to provide assist force to the front brake master cylinder 32 by the rear electric brake assist unit; and wherein when it is determined that the rear electric brake assist unit is disabled, the normally closed solenoid valve 45 is opened to provide assist to the rear master cylinder 42 using the front electric brake assist unit.
Specifically, when it is determined that the front electric brake assist unit 33 is disabled, the front electronic brake control module 20 and the rear electronic brake control module 40 send control commands to the front electric brake assist unit 33 and the rear electric brake assist unit 43, respectively. At this time, since the hydraulic pressure of the front master cylinder 32 is low, the normally closed solenoid valve 45 (see fig. 2) of the line from the rear master cylinder 42 to the front hydraulic control unit is opened, and the boosting force is provided by the rear electric brake boosting unit 43, and the respective brake line pressures are regulated by the front and rear ABS/ESP electronic valve assemblies, thereby performing the vehicle braking function.
When it is determined that the rear electric brake assist unit 43 is disabled, the front electronic brake control module 20 and the rear electronic brake control module 40 send control commands to the front electric brake assist unit 33 and the rear electric brake assist unit 43, respectively. At this time, since the hydraulic pressure of the rear master cylinder 42 is low, the normally closed solenoid valve 45 of the line from the front master cylinder 32 to the rear hydraulic control unit is opened, the assist force is provided by the front electric brake assist unit 33, and the respective brake line pressures are adjusted by the front and rear ABS/ESP electronic valve assemblies to perform the vehicle braking function.
By utilizing the embodiment, the normally closed electromagnetic valve is arranged, the front and back intercommunication of the brake-by-wire system is realized, and under the condition that the electric brake power assisting unit on one side fails, the power assisting unit still provides power for the failed side, so that the reliability of the brake-by-wire control is improved.
Another embodiment of the present application further provides a vehicle including the brake-by-wire system according to embodiment 1 or embodiment 2, which is not described herein again.
A vehicle including the brake-by-wire system according to the embodiment of the present application can obtain substantially the same action and effect as the brake-by-wire system, and will not be described in detail herein.
While the present application is described in terms of various aspects, including exemplary embodiments, the principles of the invention should not be limited to the disclosed embodiments, but are also intended to cover various modifications, equivalents, and alternatives falling within the spirit and scope of the invention as defined by the appended claims.
Claims (12)
1. A line control actuator system, comprising: a vehicle information detection unit, a pedal mechanism assembly, an electric brake power assisting unit, an electronic valve assembly, an electronic brake control module and a brake, wherein,
the electronic brake control module comprises a front electronic brake control module and a rear electronic brake control module, the electric brake power assisting unit comprises a front electric brake power assisting unit and a rear electric brake power assisting unit, the electronic valve assembly comprises a front electronic valve assembly and a rear electronic valve assembly, and the brakes comprise a left front brake, a right front brake, a left rear brake and a right rear brake, wherein,
the front electronic brake control module is communicatively coupled to the front electronic valve assembly, the rear electronic brake control module is communicatively coupled to the rear electronic valve assembly, and wherein,
the front electronic brake control module and the rear electronic brake control module are both communicably connected with the front electric brake booster unit and the rear electric brake booster unit.
2. The brake-by-wire system according to claim 1, further comprising: a front brake master cylinder, a rear brake master cylinder, a front brake oil can, and a rear brake oil can, and wherein,
the front electronic valve assembly comprises a front hydraulic control unit for controlling the front brake master cylinder, and the rear electronic valve assembly comprises a rear hydraulic control unit for controlling the rear brake master cylinder.
3. The brake-by-wire system of claim 2, further comprising an electronic parking brake control module.
4. The brake-by-wire system according to claim 3, wherein,
the vehicle information detecting unit includes a brake pedal position sensor, a brake line pressure sensor, a vehicle speed sensor, a wheel speed sensor, and a yaw rate sensor.
5. The brake-by-wire system according to claim 2, further comprising:
a normally closed solenoid valve connected between the pipeline of the front hydraulic control unit and the pipeline of the rear hydraulic control unit.
6. A brake-by-wire method characterized by using the brake-by-wire system according to any one of claims 1 to 4, the brake-by-wire method comprising:
determining whether a failure fault exists in the electronic brake module and the electric brake power assisting unit of the brake-by-wire system; and
when it is determined that the failure fault does not exist, normal braking is performed, and when it is determined that the failure fault exists in any one of the electronic brake module and the electric brake assist unit, abnormal braking is performed.
7. The brake-by-wire method according to claim 6, wherein the performing normal braking includes:
the front electronic brake control module and the rear electronic brake control module receive the vehicle running information sent from the vehicle information detection unit or an instruction sent from a vehicle control unit, calculate required brake pressure of each brake pipeline, and send a control instruction including the required brake pressure to the front electric brake power-assisting unit and the rear electric brake power-assisting unit and the front electronic valve assembly and the rear electronic valve assembly, so as to adjust the pressure of each brake pipeline to the required brake pressure and control each actuator to brake.
8. The brake-by-wire method according to claim 7, wherein the sending of the control command by the front electronic brake control module and the rear electronic brake control module comprises:
the front electronic brake control module sends the control instruction to the front electric brake power assisting unit and the front electronic valve assembly so as to adjust the pressure of a front brake pipeline, control the left front brake and the right front brake to brake, and control the left front brake and the right front brake to brake
And the rear electronic brake control module sends the control instruction to the rear electric brake power assisting unit and the rear electronic valve assembly so as to adjust the pressure of a rear brake pipeline and control the left rear brake and the right rear brake to brake.
9. The brake-by-wire method according to any one of claims 6 to 8, wherein the performing abnormal braking includes:
when it is determined that one of the front electronic brake control module and the rear electronic brake control module is out of order, the other of the front electronic brake control module and the rear electronic brake control module sends the control command to the front electric brake assist unit and the rear electric brake assist unit.
10. The brake-by-wire system according to any one of claims 6 to 8, wherein the performing abnormal braking includes:
when the front electric brake assisting unit is judged to be invalid, the front electric brake control module and the rear electric brake control module send the control instruction to the rear electric brake assisting unit and the front electronic valve assembly and the rear electronic valve assembly; and is
When the rear electric brake assisting unit is judged to be invalid, the front electric brake control module and the rear electric brake control module send the control instruction to the front electric brake assisting unit, the front electronic valve assembly and the rear electronic valve assembly.
11. The brake-by-wire method according to any one of claims 6 to 8, which utilizes the brake-by-wire system according to claim 5, wherein the performing abnormal braking includes:
when the front electric brake assisting unit is judged to be invalid, the normally closed electromagnetic valve is opened so as to provide assisting power for the front brake main cylinder by using the rear electric brake assisting unit; and wherein the one or more of the one or more,
and when the rear electric brake assisting unit is judged to be invalid, opening the normally closed electromagnetic valve to provide assisting power for the rear brake master cylinder by using the front electric brake assisting unit.
12. A vehicle characterized by comprising a brake-by-wire system according to any one of claims 1 to 5.
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| CN202111650385.2A CN114291062B (en) | 2021-12-30 | 2021-12-30 | Brake-by-wire system, brake-by-wire method and vehicle comprising brake-by-wire system |
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| CN202111650385.2A CN114291062B (en) | 2021-12-30 | 2021-12-30 | Brake-by-wire system, brake-by-wire method and vehicle comprising brake-by-wire system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115158277A (en) * | 2022-09-07 | 2022-10-11 | 万向钱潮股份公司 | Redundancy control method and redundancy control system for multi-brake system |
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