CN109733368A - A kind of line control brake system and its control method of anti-failure - Google Patents
A kind of line control brake system and its control method of anti-failure Download PDFInfo
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- CN109733368A CN109733368A CN201910048370.5A CN201910048370A CN109733368A CN 109733368 A CN109733368 A CN 109733368A CN 201910048370 A CN201910048370 A CN 201910048370A CN 109733368 A CN109733368 A CN 109733368A
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Abstract
The invention discloses the line control brake systems and its control method of a kind of anti-failure, the system includes electronic control unit, brake unit and anti-disabling unit, wherein electronic control unit receives brake pedal signal, the current signal of Hall sensor acquisition, it controls brake-by-wire and triggers anti-disabling unit, brake unit is for implementing brake force, complete braking process, anti- disabling unit is a kind of mechanical hydraulic unit, by hydraulic briquetting, friction block, coil, hydraulic brake line and hydraulic cylinder form, when brake-by-wire and automatically controlled failure, quick response, reliable brake force is provided and guarantees brake safe；Alternate brake unit of the anti-disabling unit as line control brake system, it is driven hydraulic system to work by vehicle itself kinetic energy and then is realized braking, braking safety is high, the anti-disabling unit is triggered by mechanical structure simultaneously, fast response time, it is intermittently braked after triggering, prevents seized, the safety of guarantee emergency braking process.
Description
Technical field
The present invention relates to brake-by-wire field more particularly to a kind of line control brake systems and its control method of anti-failure.
Background technique
Braking system is one of important component of automobile, is directly related to comprehensive vehicle performance and lives and properties peace
Entirely, drum-type or disk-type friction mode of braking are generally used, thermal energy is converted by friction by the kinetic energy of automobile, potential energy, realizes vapour
Vehicle slows down or the purpose of braking.Although conventional hydraulic formula, vapour-pressure type running brake can satisfy the items of existing brake legislation
It is required that but that there is response speeds is slow, can not actively adjust, be not easy in place of the deficiencies of integrated control, be not suitable for current vapour
The demand for development of vehicle.
Brake-by-wire is extended from vacuum booster, and vacuum booster is replaced to push master cylinder living with a motor
Plug.Due to automobile chassis narrow space, the necessary very little of the volume of motor, while to have a set of efficient deceleration device, by motor
Torque be converted to powerful linear thrust.Before motor technology is 1999 not advanced enough, people have to abandon this direct
The thinking of master cylinder is pushed, then uses high pressure accumulator.Here it is the SBC of benz, the EBC system of Toyota, day close SCB, this
Set system is established hydraulic using motor, then high pressure brake fluid is stored in high pressure accumulator, release when needing to brake.This set
System structure is complicated, and fluid pressure line is numerous, and with high costs, reliability is not high.Benz once recalled SBC system on a large scale, rich
EBC system was also once recalled in field, and benz does not almost have to SBC system today；And Toyota is from 2000 always with till now；
The SCB then all closed using day on general and Ford mixed motor-car.
Since cost is excessively high, from 2007, EVP electronic vacuum pump started to replace this height on electric vehicle or mixed motor-car
Accumulator designs are pressed, EVP is extremely simple, is exactly that the vacuum servo transposition electronic vacuum pump of oily vehicle is obtained vacuum.But disadvantage
Clearly, it is first almost without any energy regenerating, secondly, can issue harsh noise when brake.Most important, it is necessary
Manpower brake pedal first, that is to say, that it is not brake-by-wire, but mechanical braking.
With the development of motor technology, the eastern machine secret service under Hitachi released electro-hydraulic line control brake system in 2009 for the first time
E-ACT.In addition to Toyota, most of Japanese mixed dynamic or pure electric car all uses this design, and most typical is exactly to produce Leaf daily.It talks about
Very simply, to push directly on master cylinder piston with brush DC super high speed motor cooperation ball-screw and reach electro-hydraulic brake-by-wire, this
Sets of plan is very high to the requirement on machining accuracy of ball-screw.About 400-600 milliseconds of traditional brake fluid system reaction time,
Electro-hydraulic brake-by-wire is about 120-150 milliseconds, and security performance increases substantially.Hundred kilometers of speed per hour brakes about can at least be shortened
9 meters or more of distance.Simultaneously on mixed dynamic and electric vehicle, almost 99% drag friction energy can be recycled.Electro-hydraulic line traffic control
Braking system E-ACT is best mode of braking generally acknowledged at present, and in order to guarantee the reliability of system, this set braking system is generally all
It needs to be added ESP (ESC) and does system backup.
EMB and traditional braking system have great difference, execute and control mechanism needs complete redesign.
Its executing agency is required to the stability of rotation of motor is converted into the translation of brake shoe, is required to deceleration increasing square, needs
It wants that the brake clearance etc. generated due to long-term work can be compensated automatically, and since its structure that limits of volume also must be skilful
It is wonderful and compact, it is very important component part in entire EMB system.Recent years some international full-sized car component manufacturers
Some research work for EMB braking system have been carried out with automobile factory, has also applied for a part of patent, has been primarily involved in competition
Company has: Conti-nental Teves, Siemens, Bosch, Eaton, Allied Signal, Delphi, Varity
Lucas, Hayes etc., and the domestic research in this project is essentially blank, only Second Automobile Works, Tsinghua University and Nanjing aviation
Space flight university has carried out some relevant research work.
The advantage that obviously there are EMB braking system many Conventional braking systems cannot compare, but due to its
Development time is short, and also essential there are many urgent problems to be solved, for example, can make if system power supply not enough power supply
It fails at line control brake system, due to generating a large amount of heat in high speed braking process, this proposes higher want to stability
It asks.Therefore a set of emergency brake system is needed, brake force is provided, guarantee brake safe.
Summary of the invention
For existing deficiency, the object of the present invention is to provide the line control brake system and its control method of a kind of anti-failure,
It is specifically a kind of to provide the line control brake system of reliable brake force when motor and electric-control system fail, have response quickly,
The reliable feature of brake force.
The technical solution of present system is:
A kind of line control brake system of anti-failure, including electronic control unit, brake unit and anti-disabling unit, the electricity
Sub-control unit includes the Hall current sensor being mounted between electric machine controller and motor, and the anti-disabling unit is machinery
Hydraulic device provides brake force when motor and electronic control unit failure.
In above scheme, the anti-disabling unit includes hydraulic briquetting, friction block, coil, hydraulic brake line, the second liquid
Cylinder pressure and first hydraulic cylinder, coil are connected with the output pin of the BCU in electronic control unit, and coil is used to control friction block,
The piston end of first hydraulic cylinder is connected with friction block, and the piston end of second hydraulic cylinder is connected with hydraulic briquetting, in two hydraulic cylinders
Brake fluid with hydraulic brake line connection.
In above scheme, the friction block includes friction plate, pedestal, spring and armature, and pedestal is close to one end of brake disc
Friction plate is installed, armature is installed in the end of pedestal fluting, and spring one end is mounted in pedestal fluting.
In above scheme, the friction plate is designed to curved surface.
A kind of control method of the line control brake system of anti-failure, judges whether BCU 1 works normally, if normal work
Make, BCU detects whether to receive brake pedal signal, if not receiving, driver does not have braking requirement, and current time is in shape
State one, subsequent time return and detect whether to receive brake pedal signal, if receiving brake pedal signal, BCU is detected and sentenced
The size of the electric current i of power machine, if iL≤i≤iH, motor is working properly, is judged as that brake-by-wire is effective, and current time is in shape
State two, subsequent time return detects whether to receive brake pedal signal, if i > iHOr i < iL, motor does not work or motor work
Abnormal state is judged as that brake-by-wire fails, maintains state three；If BCU operation irregularity, anti-disabling unit is triggered, maintains shape
State four.
Further, the state one specifically: do not carry out brake-by-wire, anti-disabling unit does not trigger, and motor does not work, system
Dynamic pressure block is failure to actuate；Coil obtains electric, armature is attracted, spring-compressed, friction block not with brake disc, do not press by first hydraulic cylinder
Contracting, second hydraulic cylinder do not apply brake force.
Further, the state two specifically: carry out brake-by-wire, anti-disabling unit does not trigger, and system is realized in motor work
It is dynamic.
Further, the state three specifically: brake-by-wire failure, anti-disabling unit are triggered, motor operation irregularity, line
Unreliable, coil blackout is moved in control, and armature disconnects, and the spring of compression pushes friction block to drive with brake disc and by it, the
One hydraulic cylinder is pressurized, and second hydraulic cylinder pushes hydraulic briquetting to apply brake force to braking briquetting, realizes braking.
Further, the state four specifically: BCU failure, anti-disabling unit are triggered, and BCU circuit burnout or power supply are not
Foot, coil blackout, armature disconnect, and the spring of compression pushes friction block to drive with brake disc and by it, first hydraulic cylinder by
Pressure, second hydraulic cylinder push hydraulic briquetting to apply brake force to braking briquetting, realize braking.
Beneficial effects of the present invention: the present invention is suitable for line control brake system, improves braking system safety, reliable
Property.Specifically, the line control brake system of anti-failure has a kind of anti-disabling unit of mechanical hydraulic unit, for working as brake-by-wire
And quick response provides reliable brake force when automatically controlled failure, realizes emergency braking.The anti-disabling unit is as line control brake system
Alternate brake unit, it is mobile by the raised band dynamic friction block in brake disc and then drive hydraulic system to work and then realize to make
Dynamic, braking safety is high；The anti-disabling unit is triggered by mechanical structure, fast response time, and external power supply is not necessarily to after triggering, is passed through
Primary power of the mechanical structure by the kinetic energy (kinetic energy of braking disc spins) of vehicle itself as braking, high reliablity；Meanwhile by
It is intermittent contact, transmitting energy in brake disc and friction block, there is also intermittences for brake force, can prevent seized guarantee tightly
The safety of anxious braking process.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of line control brake system of the present invention；
Fig. 2 is the friction block partial enlarged view of line control brake system of the present invention；
Fig. 3 is the friction block and brake disc location diagram of line control brake system of the present invention；
Fig. 4 is the friction block side view of line control brake system of the present invention；
Fig. 5 is the hydraulic briquetting side view of line control brake system of the present invention；
Fig. 6 is the control method flow diagram of line control brake system of the present invention；
In figure, 1, BCU；2, battery；3, electric machine controller；4, Hall current sensor；5, motor；6, ball-screw；7,
Nut；8, brake casing；9, briquetting is braked；10, brake(-holder) block；11, brake disc；12, hydraulic briquetting；13, friction block；14, line
Circle；15, hydraulic brake line；16, second hydraulic cylinder；17, first hydraulic cylinder；131, friction plate；132, pedestal；133, spring；
134, armature.
Specific embodiment
Invention is further described in detail for specific embodiment with reference to the accompanying drawing, but protection scope of the present invention is simultaneously
It is without being limited thereto.
Fig. 1-5 show a kind of line control brake system of anti-failure, including electronic control unit, brake unit and anti-failure
Unit.
Electronic control unit includes BCU 1, battery 2, electric machine controller (MCU) 3, Hall current sensor 4, BCU1 and electricity
Pond 2, electric machine controller 3 and Hall current sensor 4 are electrically connected；BCU 1 is brak control unit (Brake Control
Unit), for receiving the current signal of brake pedal signal, Hall sensor acquisition, while controlling electric machine controller 3 and then controlling
Brake-by-wire is realized in the work of motor 5 processed；BCU 1 is for judging whether driver has whether the demand of braking and motor 5 are implemented
Braking, and then judge whether brake-by-wire fails；BCU 1 is electrically connected with anti-disabling unit, and the output pin of BCU 1 is anti-mistake
Electric elements continued power in unit is imitated, when judging line control brake system failure and 1 itself fail of BCU, BCU's 1 is defeated
Pin stops powering to anti-disabling unit out, and anti-disabling unit work is braked in triggering；Battery 2 is the energy-storage travelling wave tube of braking system,
For powering to BCU 1 and electric machine controller 3, electric machine controller 3 provides power to motor 5 again, and battery 2 is indirect by BCU1
It powers to anti-disabling unit；Electric machine controller 3 provides electric energy for motor 5, and defeated according to the control instruction of BCU 1 control motor 5
Corresponding rotational speed and torque out, while 5 current state of motor is fed back into BCU 1；(the Hall Current of Hall current sensor 4
Sensor, abbreviation HCS) it is installed between electric machine controller 3 and motor 5, according to Hall effect principle, acquire the electric current of motor 5
Signal simultaneously passes to BCU 1, and current signal is directly measured by Hall current sensor 4, as judging whether motor 5 works non-
Programming standard has higher reliability.
Brake unit is by motor 5, ball-screw 6, nut 7, brake casing 8, braking briquetting 9, brake(-holder) block 10 and braking
Disk 11 forms, and for implementing brake force, completes braking process；Motor 5 is connected with ball-screw 6, by the control of electric machine controller 3
System, provides brake force for brake unit and adjusts gap；6 one end of ball-screw is connected with motor 5, and the other end is connected with nut 7,
It moves along a straight line for converting nut 7 for the rotary motion of motor 5；Nut 7 is mounted in brake casing 8, with ball-screw 6
Cooperation is contacted with braking briquetting 9, and linear motion is passed to braking briquetting 9；Braking 9 one end of briquetting contacted with hydraulic briquetting 12,
And the end at the end is contacted with nut 7, the other end is connected with brake(-holder) block 10, and braking briquetting 9 is mounted in brake casing 8, uses
In transmitting brake force, and then brake(-holder) block 10 is pushed to realize braking；Brake(-holder) block 10 be mounted on braking briquetting 9 on, with brake disc 11 it
Between there are gaps, when braking, brake(-holder) block 10 is contacted with brake disc 11, rub, by vehicle advance mechanical energy be converted into
Frictional heat realizes braking.The protrusion (Fig. 3) that Disjunct distribution is had on 11 side circumference of brake disc, for being connect with anti-disabling unit
Touching, passes to anti-disabling unit for the kinetic energy of brake disc, provides the energy source of brake force for anti-disabling unit.
Anti- disabling unit is a kind of mechanical hydraulic unit, by hydraulic briquetting 12, friction block 13, coil 14, hydraulic braking pipe
Road 15, second hydraulic cylinder 16 and first hydraulic cylinder 17 form, and when motor 5 and electronic control unit failure, quick response is provided
Reliable brake force guarantees brake safe；Coil 14 is mounted in brake casing 8, is powered by the output pin of BCU 1, is worked as line
Control is dynamic when not failing, and coil 14 be in continued power state, and when brake-by-wire failure, coil 14 powers off triggers anti-mistake in turn
Imitate unit；Friction block 13 is installed in brake casing 8, is controlled by 14 electromagnetic force of coil, when brake-by-wire does not fail, friction
Block 13 is contacted by the electromagnetic attracting force of coil 14, while not being contacted with brake disc 11, and there are certain gaps, when brake-by-wire loses
When effect, friction block 13 is not contacted with coil 14, is contacted with brake disc 11 and is generated sliding friction；When friction block 13 and brake disc 11
When contact, the brake disc 11 of rotation drives friction block 13 mobile by frictional force, compresses first hydraulic cylinder 17, provides initial brake
Power.
Such as Fig. 2, friction block 13 is made of friction plate 131, pedestal 132, spring 133 and armature 134；The pedestal 132 of C font
For the main body of friction block 13, pedestal 132 is installed in brake casing 8；Pedestal 132 is equipped with close to one end of brake disc 11 and rubs
Pad 131 improves coefficient of friction and then increasing friction force for rubbing with brake disc 11；The end that pedestal 132 is slotted is installed by rank
Iron 134,133 one end of spring are mounted in the fluting of pedestal 132, and the other end is contacted but is not fixed with coil 14, and when installation guarantees bullet
Spring 133 is in compressive state；Armature 134 is controlled by 14 electromagnetic force of coil, and when coil 14 is powered, armature 134 is attracted, and makes to rub
Block 13 is contacted with coil 14, and spring 133 is pressurized；When coil 14 powers off, armature 134 is disconnected, and spring 133 pushes away friction plate 131
It contacts and rubs with brake disc 11 out；Such as Fig. 3, friction plate 131 is curved design, is produced when for 11 projection contacts of brake disc
It is raw to rub and be braked the drive of disk 11, move friction block 13 in brake casing 8；131 curved design of friction plate is without straight
It connects using wedge-shaped design, makes the power of 13 intermittent reception brake disc 11 of friction block, drive anti-disabling unit interval to brake, prevent from making
Occurs locking phenomenon during dynamic.
First hydraulic cylinder 17 is mounted in brake casing 8, and such as Fig. 4, piston end is connected with pedestal 132, brake fluid in cylinder
With 15 connection of hydraulic brake line, mobile extruding first hydraulic cylinder 17, and then first are driven since friction block 13 is braked disk 11
The compression of hydraulic cylinder 17 provides pressure to hydraulic brake line 15；Second hydraulic cylinder 16 is mounted in brake casing 8, piston end with
Hydraulic briquetting 12 is connected, and brake fluid and 15 connection of hydraulic brake line in cylinder, second hydraulic cylinder 16 receive hydraulic brake line 15
Pressure, second hydraulic cylinder 16 expands against hydraulic briquetting 12；15 subsection setup of hydraulic brake line in brake casing 8,
Between be placed in outside brake casing 8 by piping connection；Hydraulic briquetting 12, such as Fig. 1 and Fig. 5, one end is contacted with braking briquetting 9, separately
One end is connected with second hydraulic cylinder 16, for hydraulic braking force to be passed to braking briquetting 9, is allowed to movement and realizes braking.
As shown in fig. 6, a kind of control method of the line control brake system of anti-failure, specific control process are as follows:
Step (1): if BCU 1 is working properly, entering step (2), if 1 operation irregularity of BCU, enters step (7)；
Step (2): BCU 1 detects whether to receive brake pedal signal, if not receiving brake pedal signal, enters
Step (3)；If receiving brake pedal signal, (4) are entered step；
Step (3): driver does not have braking requirement, and current time is in state one, subsequent time return step (2)；
Step (4): driver has braking requirement, and BCU 1 is detected and judged the current signal of motor 5, if the electric current of motor 5
I meets iL≤i≤iH, enter step (5)；If electric current i > i of motor 5HOr i < iL, enter step (6)；Wherein iHJust for motor 5
The upper limit threshold of normal operating current, iLFor the lower threshold of 5 running current of motor；
Step (5): iL≤i≤iH, motor 5 is working properly, is judged as that brake-by-wire is effective, and current time is in state two,
Subsequent time return step (2)；
Step (6): i > iHOr i < iL, motor 5 does not work or 5 working condition of motor is abnormal, it is judged as that brake-by-wire fails,
Maintenance state three guarantees brake safe；
Step (7): 1 operation irregularity of BCU, system cut-off trigger anti-disabling unit, maintain state four, guarantee brake safe；
The state one: not carrying out brake-by-wire, and anti-disabling unit does not trigger, specifically, motor 5 does not work, braking pressure
Block 9 is not by the power of brake-by-wire；The output pin of BCU1 is powered to coil 14, armature 134 is attracted, spring 133 is in
Compressive state, friction block 13 are not contacted with brake disc 11, no friction, and then first hydraulic cylinder 17 is not compressed, second hydraulic cylinder 16
Hydraulic briquetting 12 is not pushed to apply brake force to braking briquetting 9.
The state two: brake-by-wire is carried out, anti-disabling unit does not trigger, specifically, anti-disabling unit does not provide braking
Power, motor 5 work, and ball-screw 6 makes nut 7 move along a straight line, and braking 9 stress of briquetting drives brake(-holder) block 10 to move, brake(-holder) block 10
It rubs with brake disc 11, realizes braking.
The state three: brake-by-wire failure, anti-disabling unit is triggered, specifically, 5 operation irregularity of motor, line traffic control
It is unreliable to move, to guarantee that brake safe, the output pin of BCU1 power off, do not have electric current to pass through in coil 14, armature 134 is broken
It opens, the spring 133 of compression pushes friction block 13 to contact with brake disc 11, occurs to rub with the brake disc 11 of rotation and is braked disk
11 drive, and the mobile first hydraulic cylinder 17 of friction block 13 is pressurized, and second hydraulic cylinder 16 pushes hydraulic briquetting 12 to apply to braking briquetting 9
Brake force, braking briquetting 9 drive brake(-holder) block 10 to move, and brake(-holder) block 10 and brake disc 11 rub, and realize braking.
The state four: BCU1 fails, and anti-disabling unit is triggered, specifically, BCU1 circuit burnout or electricity shortage, make
The output pin of BCU1 powers off, and does not have electric current to pass through in coil 14, armature 134 is disconnected, and the spring 133 of compression pushes friction block
13 contact with brake disc 11, occur to rub with the brake disc 11 of rotation and be driven by it, the mobile first hydraulic cylinder 17 of friction block 13
It is pressurized, second hydraulic cylinder 16 pushes hydraulic briquetting 12 to apply brake force to braking briquetting 9, and braking briquetting 9 drives brake(-holder) block 10 to transport
Dynamic, brake(-holder) block 10 and brake disc 11 rub, and realize braking.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " illustrative examples ",
The description of " example ", specific examples or " some examples " etc. means specific features described in conjunction with this embodiment or example, knot
Structure, material or feature are included at least one embodiment or example of the invention.In the present specification, to above-mentioned term
Schematic representation may not refer to the same embodiment or example.Moreover, specific features, structure, material or the spy of description
Point can be combined in any suitable manner in any one or more of the embodiments or examples.
Although an embodiment of the present invention has been shown and described, it will be understood by those skilled in the art that: not
A variety of change, modification, replacement and modification can be carried out to these embodiments in the case where being detached from the principle of the present invention and objective, this
The range of invention is defined by the claims and their equivalents.
Claims (9)
1. a kind of line control brake system of anti-failure, which is characterized in that single including electronic control unit, brake unit and anti-failure
Member, the electronic control unit include the Hall current sensor (4) being mounted between electric machine controller (3) and motor (5), institute
Stating anti-disabling unit is that mechanical hydraulic unit provides brake force when motor (5) and electronic control unit failure.
2. the line control brake system of anti-failure according to claim 1, which is characterized in that the anti-disabling unit includes liquid
Press briquetting (12), friction block (13), coil (14), hydraulic brake line (15), second hydraulic cylinder (16) and first hydraulic cylinder
(17), coil (14) is connected with the output pin of the BCU (1) in electronic control unit, and coil (14) is for controlling friction block
(13), the piston end of first hydraulic cylinder (17) is connected with friction block (13), the piston end and hydraulic briquetting of second hydraulic cylinder (16)
(12) be connected, brake fluid in two hydraulic cylinders with hydraulic brake line (15) connection.
3. the line control brake system of anti-failure according to claim 1, which is characterized in that the friction block (13) includes rubbing
Pad (131), pedestal (132), spring (133) and armature (134), pedestal (132) are equipped with close to the one end of brake disc (11)
Armature (134) are installed in the end of friction plate (131), pedestal (132) fluting, and spring (133) one end is mounted on pedestal (132) fluting
In.
4. the line control brake system of anti-failure according to claim 3, which is characterized in that friction plate (131) design
At curved surface.
5. a kind of control method of the line control brake system of anti-failure according to claim 1, which is characterized in that judgement
Whether BCU (1) works normally, if worked normally, BCU (1) detects whether to receive brake pedal signal, if not receiving,
Driver does not have braking requirement, and current time is in state one, and subsequent time return detects whether to receive brake pedal signal,
If receiving brake pedal signal, BCU (1) detects and judges the size of the electric current i of motor (5), if iL≤i≤iH, motor (5)
It is working properly, it is judged as that brake-by-wire is effective, current time is in state two, and subsequent time return detects whether to receive braking
Pedal signal, if i > iHOr i < iL, motor (5) does not work or motor (5) working condition is abnormal, is judged as that brake-by-wire fails, dimension
Hold state three；If BCU (1) operation irregularity, anti-disabling unit is triggered, maintains state four.
6. according to the control method of the line control brake system of the anti-failure of claim 5, which is characterized in that the state one is specific
Are as follows: brake-by-wire is not carried out, and anti-disabling unit does not trigger, and motor (5) does not work, and braking briquetting (9) is failure to actuate；Coil (14)
Armature (134) are attracted, spring (133) compression by electricity, and friction block (13) is not contacted with brake disc (11), first hydraulic cylinder (17)
It does not compress, second hydraulic cylinder (16) does not apply brake force.
7. according to the line control brake system control method of the anti-failure of claim 5, which is characterized in that the state two specifically:
Brake-by-wire is carried out, anti-disabling unit does not trigger, and braking is realized in motor (5) work.
8. according to the line control brake system control method of the anti-failure of claim 5, which is characterized in that the state three specifically:
Brake-by-wire failure, anti-disabling unit are triggered, and motor (5) operation irregularity, brake-by-wire is unreliable, coil (14) power-off, rank
Iron (134) disconnects, and the spring (133) of compression pushes friction block (13) to contact with brake disc (11) and driven by it, and first is hydraulic
Cylinder (17) is pressurized, and second hydraulic cylinder (16) pushes hydraulic briquetting (12) to apply brake force to braking briquetting (9), realizes braking.
9. according to the line control brake system control method of the anti-failure of claim 5, which is characterized in that the state four specifically:
BCU (1) failure, anti-disabling unit are triggered, BCU (1) circuit burnout or electricity shortage, coil (14) power-off, and armature (134) is disconnected
Open, the spring (133) of compression pushes friction block (13) to contact with brake disc (11) and driven by it, first hydraulic cylinder (17) by
Pressure, second hydraulic cylinder (16) push hydraulic briquetting (12) to apply brake force to braking briquetting (9), realize braking.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910048370.5A CN109733368B (en) | 2019-01-18 | 2019-01-18 | Failure-preventing brake-by-wire system and control method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910048370.5A CN109733368B (en) | 2019-01-18 | 2019-01-18 | Failure-preventing brake-by-wire system and control method thereof |
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| CN112298125A (en) * | 2019-07-31 | 2021-02-02 | 比亚迪股份有限公司 | Brake-by-wire system and vehicle |
| CN114537352A (en) * | 2022-01-14 | 2022-05-27 | 南京金龙客车制造有限公司 | Integrated cooling high-reliability brake-by-wire system and method |
| CN114810880A (en) * | 2022-06-27 | 2022-07-29 | 烟台大学 | Vehicle brake pad abrasion detection device and detection system |
| CN114852027A (en) * | 2022-06-02 | 2022-08-05 | 清智汽车科技(苏州)有限公司 | Automobile electronic power-assisted brake control method and device |
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| CN114852027A (en) * | 2022-06-02 | 2022-08-05 | 清智汽车科技(苏州)有限公司 | Automobile electronic power-assisted brake control method and device |
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| CN114810880B (en) * | 2022-06-27 | 2022-09-02 | 烟台大学 | Vehicle brake pad abrasion detection device and detection system |
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