CN114701469A - High-redundancy line-controlled chassis braking system architecture and method - Google Patents
High-redundancy line-controlled chassis braking system architecture and method Download PDFInfo
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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
- B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
- B60T13/74—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with electrical assistance or drive
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K1/00—Arrangement or mounting of electrical propulsion units
- B60K1/02—Arrangement or mounting of electrical propulsion units comprising more than one electric motor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L7/00—Electrodynamic brake systems for vehicles in general
- B60L7/10—Dynamic electric regenerative braking
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
- B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
- B60R16/03—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements for supply of electrical power to vehicle subsystems or for
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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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- 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
- B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
- B60T8/32—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration
- B60T8/88—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration with failure responsive means, i.e. means for detecting and indicating faulty operation of the speed responsive control means
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Transportation (AREA)
- Power Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Valves And Accessory Devices For Braking Systems (AREA)
- Regulating Braking Force (AREA)
Abstract
The invention relates to the technical field of brake systems, in particular to a high-redundancy line-control chassis brake system framework and a method, wherein the high-redundancy line-control chassis brake system framework comprises four wheels, namely a double power supply, a double-set line-control brake system, a line-control chassis main controller and a hydraulic force action, wherein a brake pipeline of the brake system framework is arranged in an X shape or an H shape, and the brake pipeline and an electronic parking brake system are mutually redundant; the double-set line control brake system comprises a first power supply and a second power supply, wherein the first power supply is used for providing power for each part controller, the second power supply is used for providing standby power for each part controller, the double-set line control brake system comprises a first EHB and a second EHB, the first EHB and the second EHB are used for service braking and active braking, and the electronic parking brake system is an EPB; the invention adopts the scheme of a double-set line control brake system, solves the problem of large oil output of the commercial vehicle, greatly improves the response speed because the EHB is the electronic power assistance, and can build 10mpa brake pressure in 150 ms.
Description
Technical Field
The invention relates to the technical field of brake systems, in particular to a high-redundancy line control chassis brake system architecture and a method.
Background
Vehicles are rapidly developing along the trends of electrification, automation and intellectualization, so that higher requirements are provided for a brake system relating to vehicle safety and driving comfort of a driver, the brake system is required to have high dynamic voltage building performance and stronger function expansion capability so as to meet the requirements of various auxiliary driving and intelligent driving, and the requirements of higher comfort, lower energy consumption and higher safety are met. At present, a hydraulic braking mode is also adopted for small and medium-sized commercial vehicles, but the tonnage of the commercial vehicle is large, the oil output is high, and an electronic power-assisted braking system is only applied to passenger vehicles at present.
The existing scheme is as follows: in order to meet the requirement of intelligent driving on a braking system, most commercial vehicles at present adopt a braking framework of a vacuum booster, an ABS/ESC and a hand brake/Electronic Parking (EPB), the vacuum booster meets the requirement of manual driving, the ABS/ESC actively builds pressure to meet the requirement of intelligent driving, and the hand brake/Electronic Parking (EPB) is adopted.
The existing scheme 1: the existing commercial vehicle braking system architecture is mostly a scheme combining a traditional vacuum booster and an ABS/ESC, and the scheme has the following defects;
1) slow response time: because the oil output of the commercial vehicle is large, the pressure building time is long and the braking distance is long by adopting the vacuum booster and the ABS/ESC;
2) the control precision is low: the ABS/ESC is adopted to actively build pressure, so that the control precision is low, the oil output of a commercial vehicle is large, the pressure fluctuation in the pressure building process is large, and the vehicle deceleration process is not smooth;
3) the redundancy is low: the active voltage build-up only depends on ABS/ESC, once the ABS/ESC fails, the whole vehicle cannot build up voltage actively, the auxiliary driving function fails, and the vehicle fails in the running process, so that casualties can be caused;
4) the service life is short: because the service life of the ABS/ESC electromagnetic valve is limited, the ABS/ESC electromagnetic valve is actively used for building voltage for a long time, so that the ABS/ESC electromagnetic valve is damaged in advance;
5) the active pressure build-up working noise is large: ABS/ESC is adopted to build voltage actively, and the noise in the voltage building process is large; (ii) a
6) The energy recovery capability is weak; according to the scheme, the basic energy recovery function can be realized through the ABS/ESC, but the deep braking energy recovery cannot be realized;
existing scheme 2: the combined brake system framework adopting the single-set line control brake system EHB and the ABS/ESC has the following defects:
1) poor control precision: due to the fact that the oil output of the commercial vehicle is large, a brake pipeline is long, and a large pressure overshoot phenomenon occurs in the high-speed pressure building process when the single-set line control brake system EHB is used for building pressure;
2) the redundancy is low: a single-set line control brake system EHB is adopted, once a fault occurs, ESC or EPB is required to be accessed, the brake comfort is poor, and the service lives of ESC and EPB are influenced;
in the document with the patent number CN110614967A (a chassis system by wire of an unmanned vehicle), the structure is simple and reliable, the control precision is high, the passing performance is good, the efficiency is high, the maintenance is convenient, and a reliable chassis system by wire can be provided for the unmanned vehicle through the chassis frame, the suspension system, the battery system, the electric control system, the four-wheel independent driving system, the domain controller CDM, the driving brake device by wire, the electronic parking device by wire and the four-wheel independent steering device by wire, and the novel chassis system by wire can realize bidirectional driving without dividing the front and back directions; in order to further realize deep energy recovery under the conditions of high control precision, good passing performance, high efficiency and convenient maintenance, the device has the advantages of quick response time, higher control precision, high redundancy and long service life.
Disclosure of Invention
The invention aims to provide a high-redundancy line-control chassis brake system framework, which comprises four wheels, namely a dual power supply, a double-set line-control brake system, a line-control chassis main controller and a hydraulic force, wherein the four wheels are mutually redundant;
the dual power is first power and second power, first power is used for providing the power for each spare part controller, the second power is used for providing stand-by power for each spare part controller, two sets of wire-controlled brake systems are first EHB and second EHB, just first EHB and second EHB are used for service braking and active braking, electron parking braking system is EPB, wire-controlled chassis main control unit is used for issuing active control instruction and discerns each system fault.
Optionally, the vehicle further comprises a brake pedal sensor, wherein the brake pedal sensor is used for acquiring the braking intention of the driver and is simultaneously acquired by the two sets of EHBs.
Optionally, an ESC is included for distributing the built-up pressure of the EHB to the wheels, as well as redundant braking functions.
Optionally, the vehicle further comprises a vehicle driving motor, and the wheel driving motor is one or more of a front axle driving motor and a rear axle driving motor.
Optionally, the vehicle further comprises an EPB, and the EPB is used for parking braking and redundant braking.
Optionally, the brake caliper is further included, and the brake caliper is used for providing braking force for the whole vehicle.
Optionally, a pedal signal is provided between the first EHB and the second EHB.
Optionally, the vehicle further comprises a front axle and a rear axle, and the wheels are respectively mounted at two ends of the front axle and the rear axle.
The invention also provides a method for the high-redundancy line-control chassis brake system, which comprises the following steps:
a. initialization: completing the power-on action of the vehicle and completing the system initialization;
b. obtaining external information and intelligent decision: the domain controller receives external information and commands and completes corresponding analysis and calculation;
c. and (3) fault detection: e, detecting the fault of the EPB, if the EPB has no fault, entering the step e, and if the EPB has a problem, maintaining the EPB;
d. and (4) maintenance: the EHP brake drives the vehicle to a repair shop to repair the EPB;
e. simultaneously detecting the EHB and the EPB of the braking devices, if no fault exists, simultaneously entering the step f by ESC redundant braking, and if a problem exists, stopping the vehicle;
f. carrying out fault detection on the brake-by-wire devices EHB, if a problem exists, continuously detecting two sets of brake devices EHB, if no fault exists, entering a step g, if a problem exists, carrying out ESC fault detection, if no fault exists, carrying out ESC redundant braking, and if a problem exists, carrying out EPB emergency braking;
g. and the other set of EHB increases the braking force to perform redundant braking.
Compared with the prior art, the invention has the beneficial effects that:
1. according to the invention, the deep energy recovery of the front axle and the rear axle can be realized by adopting a high-redundancy braking system architecture scheme of a double-set line control braking system (EHB) and an H-shaped arrangement scheme of the double-set line control braking system (EHB).
2. The invention also has the following advantages:
1) the response time is fast: the scheme of a double-set line control brake system (EHB) is adopted, the problem of large oil output of a commercial vehicle is solved, and as the EHB is used for greatly improving the electronic power-assisted response speed, 10mpa brake pressure can be built within 150 ms;
2) the control precision is high: because the brake-by-wire system (EHB) is a servo brake system and is provided with a pressure sensor, the accurate pressure closed-loop control can be realized;
3) the redundancy is high: the first EHB, the second EHB, the ESC and the EPB 4 are mutually redundant, so that the safety of the vehicle is greatly improved, and the detailed technical scheme is provided;
4) the service life is high: service braking and active braking are both performed by a wired control brake system (EHB), so that more than 200 ten thousand braking actions can be realized, the use of an ABS/ESC electromagnetic valve is reduced, and the service life of the whole braking system is greatly prolonged;
5) the working noise is low: manual driving and active voltage building are both executed by an electric control system (EHB), so that the working noise is low, and the comfort level of passengers is high;
6) the scheme adopts a double-set line control brake system (EHB) H-shaped arrangement scheme, can realize the deep energy recovery of the front axle and the rear axle, for example, when a vehicle adopts rear axle driving, the front axle can carry out normal friction braking in the braking process, the rear axle can be controlled by the EHB, and the driving motor carries out back dragging to provide braking force, thereby realizing the deep energy recovery of the rear axle.
Drawings
FIG. 1 is a brake system architecture diagram of the present invention;
FIG. 2 is a control logic diagram for the braking system of the present invention.
The reference numbers illustrate:
101. a first power supply; 102. a second power supply; 201. a first EHB; 202. a second EHB; 3. a pedal signal; 4. ESC; 5. a line control chassis master controller; 601. a drive motor; 602. a drive motor; 7. EPB; 8. a brake caliper; 9. a front axle; 10. a rear axle; 11. and (7) wheels.
The objects, features, and advantages of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1 and 2, the present invention provides a high redundancy wire-controlled chassis braking system architecture, which includes a dual power source, a dual set of wire-controlled braking system mutual redundancy, a wire-controlled chassis main controller 5 and four wheels 11 acted by hydraulic pressure, wherein the braking pipeline of the braking system architecture adopts an X-type arrangement or an H-type arrangement, and the braking pipeline and the electronic parking braking system mutual redundancy;
the dual power supplies are a first power supply 101 and a second power supply 102, the first power supply 101 is used for providing power for each part controller, the second power supply 102 is used for providing standby power for each part controller, the dual-set line control brake system is a first EHB201 and a second EHB202, the first EHB201 and the second EHB202 are used for service braking and active braking, the electronic parking brake system is an EPB7, and the line control chassis main controller 5 is used for issuing an active control instruction and identifying each system fault; the first and second EHBs 201, 202 are redundant of one another, with one set still providing brake pressure in the event of a failure.
Referring to fig. 1, the system further comprises a brake pedal sensor, wherein the brake pedal sensor is used for acquiring a braking intention of a driver, the brake pedal sensor is simultaneously acquired by two sets of EHBs, the ESC4 is further comprised, the ESC4 is used for distributing the pressure of the EHBs to the wheels 11, the redundant braking function is also comprised, and the system further comprises a vehicle driving motor, wherein the wheel driving motor is one or more of a front axle driving motor 601 and a rear axle driving motor 602; when two sets of EHBs have faults simultaneously, the ESC4 can be used for pressure build-up, and front driving, rear driving or four-driving can be selected according to different vehicle types through different selections of the front axle driving motor 601 and the rear axle driving motor 602.
Referring to fig. 1, the vehicle brake system further comprises an EPB7, an EPB7 is used for parking braking and redundant braking, the vehicle brake system further comprises a brake caliper 8, the brake caliper 8 is used for providing braking force for the whole vehicle, a pedal signal 3 is arranged between a first EHB201 and a second EHB202, the vehicle brake system further comprises a front axle 9 and a rear axle 10, and wheels 11 are respectively installed at two ends of the front axle 9 and the rear axle 10; the EPB7 can receive the command of the main controller 5 of the drive-by-wire chassis to realize active pull-up and release, and can utilize the EPB7 to perform emergency braking when the EHB and the ESC4 fail simultaneously.
Referring to fig. 2, the present invention also provides a method of a highly redundant chassis-by-wire brake system, comprising the steps of:
a. initialization: completing the power-on action of the vehicle and completing the system initialization;
b. obtaining external information and intelligent decision: the domain controller receives external information and commands and completes corresponding analysis and calculation;
c. and (3) fault detection: detecting the fault of the electronic parking brake device EPB7, if no fault exists, entering the step e, and if a problem exists, maintaining the electronic parking brake device EPB 7;
d. and (4) maintenance: the EHP brake drives the vehicle to a repair shop to service EPB 7;
e. detecting the braking devices EHB and EPB7 simultaneously, if no fault exists, performing redundant braking of the ESC4 simultaneously to step f, and if a problem exists, stopping;
f. carrying out fault detection on the brake-by-wire devices EHB, if the brake-by-wire devices EHB have problems, continuously detecting two sets of brake devices EHB, if the brake-by-wire devices EHB have no faults, entering a step g, if the brake-by-wire devices EHB have problems, carrying out ESC4 fault detection, if the brake-by-wire devices have no faults, carrying out ESC4 redundant braking, and if the brake-by-wire devices have problems, carrying out EPB7 emergency braking;
g. and the other set of EHB increases the braking force to perform redundant braking.
Wherein the brake-by-wire system (EHB):
this scheme adopts eBooster drive-by-wire braking system, and its structure mainly includes: the system comprises a power-assisted motor, a power-assisted transmission mechanism, a push rod mechanism, a stroke sensor, a main cylinder, a pressure sensor and other system components. In order to achieve light weight better, except for the fact that the driving pinion is made of steel gears, other transmission gears are made of non-metal materials.
The working principle is as follows: the driver steps on the brake pedal, the input push rod generates displacement, the pedal stroke sensor detects the displacement of the input push rod and sends a displacement signal to the controller, the controller calculates the torque which is required to be generated by the motor, and the transmission device converts the torque into servo braking force. The servo braking force acts together with the input push rod force generated by the input of the pedal, and is converted into the hydraulic pressure of a brake wheel cylinder in the brake master cylinder together to realize braking.
The advantages are that: 1) the brake system does not depend on a vacuum source, replaces the traditional vacuum pump and vacuum hose, has smaller volume, lighter weight of the whole brake system and does not need to consume energy to establish the vacuum source. Meanwhile, the power-assisted mode is not influenced by external air pressure, so that the brake system has no altitude reaction;
2) because the structure highly integrates and makes overall dimension littleer, more be favorable to spatial arrangement, the helping hand ability is stronger moreover, compares under the same helping hand ability, and is obvious with traditional vacuum booster size advantage.
3) The servo brake system consumes electric quantity only during braking, and particularly the power consumption of the whole vehicle required during emergency braking is lower.
Introduction of functions: 1) electronic power assisting: when a driver steps on a brake pedal, the control software generates corresponding brake pressure through controlling the motor according to the brake intention of the driver;
2) actively building voltage: the method comprises the steps that the eBooster is controlled to establish certain brake pressure through a CANbus command, so that the eBooster can provide a brake function for other systems with brake requirements, such as AEB and the like, of the whole vehicle, and the eBooster has high expansibility due to the function;
3) energy recovery: the braking energy recovery system recovers redundant energy released by the vehicle in braking or freewheeling, converts the redundant energy into electric energy through the motor, and then stores the electric energy in the storage battery;
4) the pedal feel is adjustable and the comfort is controlled, wherein the eBooster adopts a semi-decoupled mechanical structure, the foot feel of a driver is completely fed back by a combined spring, and the foot feel of the driver is changed by adjusting the force of a brake pedal and the corresponding brake pressure in the braking process;
5) other expansion functions are as follows: such as AutoHold, hill start, redundant ABS, etc.
In summary, in the normal automatic driving mode, the EHB and EPB7 brake systems execute corresponding brake functions according to the driver's instruction or receive the brake command of the chassis controller by wire CAN bus, and according to the received brake instruction. When one EHB system fails, the braking force of the other EHB system can be increased to a certain extent to ensure that the braking distance is unchanged. When both EHBs fail simultaneously, brake pressure is provided by ESC4 to bring the vehicle to a stop. When two sets of EHBs and ESC4 fail simultaneously, emergency braking by the EPB7 braking system stops the vehicle. When the EPB7 system fails, the EHB system can provide electronic power assistance to drive the vehicle to a desired parking position for maintenance. The first EHB201, the second EHB202, the ESC4 and the EPB7 are mutually redundant, thereby greatly improving the safety of the vehicle.
While the invention has been described in further detail in connection with specific embodiments thereof, it will be understood that the invention is not limited thereto, and that various other modifications and substitutions may be made by those skilled in the art without departing from the spirit of the invention, which should be considered to be within the scope of the invention as defined by the appended claims.
Claims (9)
1. A high-redundancy line-control chassis brake system architecture is characterized in that: the brake system comprises a dual power supply, mutual redundancy of double-set line-control brake systems, a line-control chassis main controller (5) and four wheels (11) acted by hydraulic pressure, wherein a brake pipeline of the brake system framework is arranged in an X type or an H type, and the brake pipeline and the electronic parking brake system are mutually redundant;
the dual-power supply is first power (101) and second power (102), first power (101) are used for providing the power for each spare part controller, second power (102) are used for providing reserve power for each spare part controller, two sets of by-wire brake systems are first EHB (201) and second EHB (202), just first EHB (201) and second EHB (202) are used for service brake and active braking, electron parking braking system is EPB (7), by-wire chassis master controller (5) are used for issuing active control instruction and discerning each system fault.
2. The highly redundant chassis-by-wire brake system architecture of claim 1, wherein: the vehicle brake system further comprises a brake pedal sensor, wherein the brake pedal sensor is used for acquiring the braking intention of a driver and is simultaneously acquired by the two sets of EHBs.
3. The highly redundant chassis-by-wire brake system architecture of claim 1, wherein: further comprising ESCs (4), said ESCs (4) being used for distributing the built-up pressure of the EHBs to the wheels (11), as well as for redundant braking functions.
4. The highly redundant chassis-by-wire brake system architecture of claim 1, wherein: the vehicle driving device further comprises a vehicle driving motor, wherein the vehicle driving motor is one or more of a front axle driving motor (601) and a rear axle driving motor (602).
5. The highly redundant chassis-by-wire brake system architecture of claim 1, wherein: also included is an EPB (7), the EPB (7) being used for parking braking as well as redundant braking.
6. The highly redundant chassis-by-wire brake system architecture of claim 1, wherein: the brake caliper (8) is further included, and the brake caliper (8) is used for providing braking force for the whole vehicle.
7. The highly redundant chassis-by-wire brake system architecture of claim 1, wherein: a pedal signal (3) is provided between the first EHB (201) and the second EHB (202).
8. The highly redundant chassis-by-wire brake system architecture of claim 1, wherein: the automobile wheel assembly is characterized by further comprising a front axle (9) and a rear axle (10), wherein wheels (11) are respectively installed at two ends of the front axle (9) and the rear axle (10).
9. A method of highly redundant chassis-by-wire braking system, comprising the steps of:
a. initialization: completing the power-on action of the vehicle and completing the system initialization;
b. obtaining external information and intelligent decision: the domain controller receives external information and commands and completes corresponding analysis and calculation;
c. and (3) fault detection: detecting faults of the electronic parking brake device EPB (7), if the faults do not exist, entering a step e, and if the faults exist, maintaining the EPB for d;
d. and (4) maintenance: the EHP brake drives the vehicle to a repair shop to repair the EPB (7);
e. simultaneously detecting the braking devices EHB and EPB (7), if no fault exists, simultaneously entering the step f by ESC redundant braking, and if a problem exists, stopping;
f. carrying out fault detection on the brake-by-wire devices EHB, if a problem exists, continuously detecting two sets of brake devices EHB, if no fault exists, entering a step g, if a problem exists, carrying out ESC fault detection, if no fault exists, carrying out ESC redundant braking, and if a problem exists, carrying out EPB (7) emergency braking;
g. and the other set of EHB increases the braking force to perform redundant braking.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210330616.XA CN114701469A (en) | 2022-03-30 | 2022-03-30 | High-redundancy line-controlled chassis braking system architecture and method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210330616.XA CN114701469A (en) | 2022-03-30 | 2022-03-30 | High-redundancy line-controlled chassis braking system architecture and method |
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| CN114701469A true CN114701469A (en) | 2022-07-05 |
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Cited By (2)
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| CN115158278A (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 |
| CN116968760A (en) * | 2023-08-04 | 2023-10-31 | 比博斯特(上海)汽车电子有限公司 | Redundant control method and device for drive-by-wire chassis of unmanned vehicle |
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| CN115158278A (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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| CN116968760B (en) * | 2023-08-04 | 2024-04-23 | 比博斯特(上海)汽车电子有限公司 | Redundant control method and device for drive-by-wire chassis of unmanned vehicle |
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