CN109131267A - A kind of secondary emergency brake arrangement of vehicle, brake method and anti-escape system - Google Patents
A kind of secondary emergency brake arrangement of vehicle, brake method and anti-escape system Download PDFInfo
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- CN109131267A CN109131267A CN201811253323.6A CN201811253323A CN109131267A CN 109131267 A CN109131267 A CN 109131267A CN 201811253323 A CN201811253323 A CN 201811253323A CN 109131267 A CN109131267 A CN 109131267A
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- brake
- braking
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- push top
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- 238000000034 method Methods 0.000 title claims description 10
- 230000033001 locomotion Effects 0.000 claims description 9
- 238000004891 communication Methods 0.000 claims description 6
- 230000009467 reduction Effects 0.000 claims description 4
- 230000007246 mechanism Effects 0.000 claims description 2
- 239000012530 fluid Substances 0.000 description 5
- 230000005540 biological transmission Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 230000004044 response Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- FGRBYDKOBBBPOI-UHFFFAOYSA-N 10,10-dioxo-2-[4-(N-phenylanilino)phenyl]thioxanthen-9-one Chemical compound O=C1c2ccccc2S(=O)(=O)c2ccc(cc12)-c1ccc(cc1)N(c1ccccc1)c1ccccc1 FGRBYDKOBBBPOI-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 210000000080 chela (arthropods) Anatomy 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 210000000003 hoof Anatomy 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 210000000056 organ Anatomy 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T1/00—Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles
- B60T1/02—Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles acting by retarding wheels
- B60T1/06—Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles acting by retarding wheels acting otherwise than on tread, e.g. employing rim, drum, disc, or transmission or on double wheels
-
- 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
-
- 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
- B60T7/00—Brake-action initiating means
- B60T7/12—Brake-action initiating means for automatic initiation; for initiation not subject to will of driver or passenger
- B60T7/16—Brake-action initiating means for automatic initiation; for initiation not subject to will of driver or passenger operated by remote control, i.e. initiating means not mounted on vehicle
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- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Braking Arrangements (AREA)
- Regulating Braking Force (AREA)
Abstract
The secondary emergency brake arrangement that the present invention provides a kind of vehicle includes motor, and the motor is as driving part for providing brake weight；Axis is braked, positive and negative rotation can be rotated under motor drive after axis connection motor in the braking；Braking push top, the braking push top connection braking axis, can realize in the case where braking axis drives and move back and forth, and then the brake component for acting on vehicle realizes brake.This brake gear can effectively provide brake torque in vehicle brake failure, guarantee to brake in safe distance, while also have ABS, ESP function.
Description
Technical field
The invention mainly relates to Vehicle Engineering correlative technology field, the secondary emergency brake arrangement of specifically a kind of vehicle,
Brake method and anti-escape system.
Background technique
In automotive control system, automobile brake is very important component part.Although traditional brake fluid system
It is widely adopted, there is higher reliability and economy.But its braking pipe fitting is long, valve element is more, be easy to cause braking stagnant
Afterwards, the problems such as braking distance is long, and safety is low, and brake fluid pollutes environment.Also just because of the limitation of its principle and structure, keeps its right
There is significant limitations in the error correcting capability itself once to go wrong.It is often made if the original part in its fluid pressure line is impaired
At fatefulue failure.
China starts to provide on January 1st, 1988, and all automobiles use dual circuit brake system.I.e. by by the near front wheel
It is separated with the brake circuits of off hind wheel, left rear wheel and off-front wheel.Guaranteed with this, even if having a brake circuit failure, still
It has another and is capable of providing a part of brake weight.Play braking left and right.But this brake system already has great limitation
Property.It can only guarantee braking in four wheels to horn ring, and enabling two-wheeled then can slide naturally, in this case, if vehicle
The enough height of speed, smaller ground friction coefficient is easily to break away in the case where wet-skid road surface, cause driver that cannot effectively control
The sliding of automobile, causes danger.And its brake force provided is too small, causes its braking distance to improve, most probably makes automobile in nothing
Method is effectively stopped in safe distance between vehicles.In safety shut-down system in brake failure, there are also it is a kind of when by by a wheel
Two brake oil cylinders use the control of two circuits respectively, this brake system all may be used to four wheels in a partial failure
To generate certain brake weight, the effective ability for improving and preventing breakking away can be.But this brake can not already provide entirely
The brake weight in portion, provided brake weight only have half size under normal circumstances, and braking distance still will increase many,
It can not still hand over and effectively guarantee automobile parking in safe distance.It is also only applicable to the brake system there are two oil cylinder simultaneously
System.Such as double-collar and shoe type brake system.
If improving the safety of brake by the method for the method brake circuit for increasing brake cylinder in former brake system
Property, then often because of the cost of its raising automobile.It is made to lose more than gain.Such as famous Lamborghini sport car, just pass through increase
The oil pincers quantity of disc brake is braked can also play the guarantee in brake failure while increasing brake weight.But its price can not be by
It is big well-established.
Therefore just there is an urgent need for a kind of energy quick response, control precision is high, and performance is assisted close to the brake even surmounted
System plays the auxiliary braking system of braking action in hydraulic system failure, response lag.
Summary of the invention
For the deficiency for solving current technology, the present invention combination prior art provides a kind of vehicle from practical application
Secondary emergency brake arrangement, the brake gear can effectively provide brake torque in vehicle brake failure, guarantee safety away from
From interior brake, while also there is ABS, ESP function.
Technical scheme is as follows:
A kind of secondary emergency brake arrangement of vehicle, including
Motor, the motor is as dynamic structure for providing brake weight；
Axis is braked, the braking axis connects motor as drive mechanism, positive and negative rotation can rotate under motor drive；
Braking push top, the braking push top can be realized as brake structure connection braking axis in the case where braking axis drives
It moves back and forth, and then the brake component for acting on vehicle realizes brake.
The braking push top is two, is respectively placed in braking axis both ends.
Braking push top one end is threadedly engaged with the supporting element being fixed on vehicle, and the other end and setting are in braking axis
On gear engagement, by the braking axis by gear drive braking push top rotation, braking have a haircut positive and negative rotation rotate when in spiral shell
Line transmission pushes lower while realizing straight reciprocating motion.
The motor drives the braking central axis by gear.
The motor is direct current generator.
A kind of brake method of above-mentioned emergency brake arrangement: by installing a delay chip additional in vehicle, in vehicle braking
After pedal moves, timing is automatically turned on, after by a setting time T, wheel speed does not drop, then makes for electrical power
Braking push top, which is stretched out, squeezes brake component offer brake force；If wheel speed reduction is too low, then reversed be powered makes braking push top retraction, wheel
Speed is gone up, and so on, until vehicle is braked completely.
By controlling the amount of feeding in the braking push top unit time, make itself and hydraulic cylinder in vehicle original braking system
The amount of feeding is identical, to make the brake gear that can share a set of ABS system with former braking system.
A kind of anti-escape system, including above-mentioned brake gear, wireless communication module, control module, by the channel radio
Letter module is transmitted to control module after remotely receiving instruction, and control module controls the motor operation of the brake gear according to instruction
State realizes the long-range braking of vehicle.
A kind of anti-escape system, the anti-escape collision system are applied to net about vehicle, and wireless communication module connection is police
Monitor supervision platform or net about vehicle platform.
Beneficial effects of the present invention:
1, secondary emergency brake arrangement provided by the present invention can satisfy the equipment such as active service haulage vehicle, special vehicle,
Suitable for the improvement to existing vehicle, reliable secondary braking is provided for vehicle, for failure other than vehicle original brake system
When, emergency braking can be played the role of.
2, the present invention has the advantages that fast response time, control precision height, components long service life, device adaptability
By force, it can guarantee reliability service under low hot environment, without having to worry about conventional hydraulic pipeline because of reliability caused by temperature reason
The factor of even failure is reduced, various household vehicles, outdoor vehicles, special vehicle, guided missile vehicle, cannon carrier vehicle are suitable for
Deng.
3, present apparatus overall cost is cheap, and transmission ratio is high, low to motor requirement, and required size is smaller, little power consumption is lacked in heat production,
And waterproofness, shock resistance, protecting against shock performance are high；Function can be carried out by changing the motion state of motor according to actual use demand
Property extension.
4, the present invention can be such that its perfection cuts by increasing diminution thread pitch, motor speed, transmission system size modulus etc.
The flow for closing brake fluid in hydraulic braking, to keep its unit time amount of feeding synchronous with hydraulic braking, and then makes it can be with liquid
Compacting is dynamic to share a set of control system.One section of program only need to be added in the original control system, send out it in each brake pedal
It is automatic to carry out the delay in several seconds of a zero point when life is trampled, pass through the comparison for postponing front and back wheel speed for this, it is determined whether use
This set brake system.
5, present invention can apply to domestic popular net about vehicle platforms at present, can disliked by the way that a key warning function is arranged
Doubtful people drives remotely to control vehicle brake when escape, collision by police monitor supervision platform, escape suspect can not
Ease, while guaranteeing passenger's driver safety.
Detailed description of the invention
Attached drawing 1 is general structure schematic diagram of the present invention；
Attached drawing 2 is Section A-A schematic cross-sectional view in Fig. 1.
Label shown in attached drawing: 1, brake drum；2, friction facing；3, brake-shoe；4, spring；5, wheel cylinder；6, it brakes
Bottom plate；7, clearance self-adjusting device；8, brake shoe anchor bolt；9, braking push top；10, gear；11, motor；12, gear；13, axis branch
Support；14, supporting element；15, axis is braked.
Specific embodiment
With reference to the drawings and specific embodiments, the invention will be further described.It should be understood that these embodiments are merely to illustrate
The present invention rather than limit the scope of the invention.In addition, it should also be understood that, after reading the content taught by the present invention, this field
Technical staff can make various changes or modifications the present invention, and such equivalent forms equally fall within range defined herein.
The secondary emergency brake arrangement of vehicle of the invention mainly includes motor 11, braking axis 15, braking push top 9.?
In the present invention, the brake weight for providing traditional wheel cylinder of innovation changes into direct current generator driving, when motor 11 starts, motor 11
Two 9 movements of braking push top are driven by braking axis 15, two can squeeze the braking of vehicle to both sides when braking 9 movement of push top
Component, to complete vehicle braking.
In the present invention, 9 one end of braking push top are threadedly engaged with the supporting element 14 being fixed on vehicle, the other end and setting
Gear 10 on braking axis 15 engages, and drives 9 rotation of braking push top by gear 10 by the braking axis 15, braking pushes away
Straight reciprocating motion is realized simultaneously under screw-driven promotion when first 9 positive and negative rotation rotates.Motor 11 passes through pitch wheel
12 driving braking axis 15 can be realized positive and negative rotation rotation, due to passing through driving gear between braking axis 15 and braking push top 9
Cooperation, therefore braking push top 9 positive and negative rotations rotation can be driven when braking 15 positive and negative rotation of axis rotation, due to braking push top 9 and support
Part 14 is threadedly engaged, therefore in braking 9 rotation of push top, is enabled to braking push top 9 by the driving force of screw thread while being generated
Linear motion, and then act on brake component and realize brake.
Secondary brake apparatus provided by the present invention when in use can be by an installation delay chip, in brake pedal
After moving, timing is automatically turned on, after by a time T, wheel speed does not drop, opens this system, and motor is logical at this time
Electricity, braking push top start to squeeze brake-shoe, provide brake force, and when wheel speed reduction is too low, then reversed to be powered, braking push top is locking,
Wheel speed is gone up, and so on, until braking completely；It can be by adjusting the screw pitch in screw-driven, motor speed, transmission system ruler
Very little modulus etc. brakes the amount of feeding of push top to control in the unit time, allow to in brake fluid system hydraulic cylinder into
It is identical to measuring, to allow to share a set of ABS system with former braking system.One section need to only be increased in the program of original system
Delay compares the code of wheel speed, starts code as it.This system can be pushed up directly completely in primary brake system failure
For original system, the forward and reverse of direct current generator are directly controlled by ABS system, to play the increase and reduction of brake weight, are reached
To the purpose of ABS.
In to expanded application of the invention, anti-escape is provided for net about one key alarm system of vehicle platform and collides function.
Currently, net about vehicle platform is current domestic popular platform, which promote the development of China's public transport, the perfect friendship in China
It is logical, but simultaneously, also participate in carrier because facilitating personnel at all levels, but some malicious person persons are organic can
Multiply.
For this or that may occur, the present apparatus can be installed on net about vehicle, and corresponding radio communication mold is set
Wireless communication module is connected to the platform of public security organ or Wang Yue vehicle company by block and control module, by platform to motor into
The long-range control of row makes suspect that can not escape to realize the long-range brake to vehicle, guarantees the safety of passenger, driver.
Embodiment: being specific embodiments of the present invention structural schematic diagram as shown in Figure 1, 2.
As shown in the figure, for the present apparatus to be mounted in drum type braking device, to provide effective secondary braking.The original of vehicle
Brake gear includes brake drum 1, friction facing 2, brake-shoe 3, spring 4, wheel cylinder 5, back-plate 6, clearance self-adjusting device
7, brake shoe anchor bolt 8, its working principle is that, when brake pedal, wheel cylinder 5 is acted, and both ends push after stretching out
Brake-shoe 3 squeezes brake drum 1 and forms brake weight.As shown, secondary emergency brake arrangement provided by the present invention is mounted on system
5 side of driving wheel cylinder, in the space inside two brake-shoes 3, including two brakings are had a haircut 9, two gears 10, the long spindle motor of direct current
11, gear 12, axis support 13, two supporting elements 14 and braking axis 15, wherein install on the output shaft of the long spindle motor 11 of direct current
There is gear, which engages with the gear 12 for being mounted on 15 middle part of braking axis, the transmitting of power is realized, on braking axis 15
An axis support 13 is respectively set in 12 two sides of gear, and a gear 10 is installed at braking 15 both ends of axis respectively, in two brake-shoes 3
A supporting element 14 is fixed in inside respectively, the internal screw thread of perforation is arranged inside the supporting element 14, two braking push tops 9 are in T font
Structure, one end setting external screw thread with supporting element 14 for being threadedly engaged, and the other end processing gear teeth with gear 10 for engaging.When
When the long spindle motor 11 of direct current rotates facing one direction, driving braking axis 15 is rotated, and 9 turns of push top of driving braking of braking axis 15
Dynamic, linear motion squeezes brake-shoe 3 outward simultaneously for braking push top 9, so that secondary braking is realized, when long 11 direction of spindle motor of direct current
When another direction rotates, the inside linear motion take-off the brake hoof 3 of braking push top 9.By the setting of this secondary brake apparatus, when
When former brake system breaks down, the long spindle motor 11 of direct current can be started, carry out secondary emergency brake.
Although being shown in the present embodiment the present invention is applied in drum type braking device, skill provided by the present invention
Art scheme is similarly applied in the secondary emergency braking of other brake modes.It needs to particularly point out, by technology of the invention
When scheme is applied to disk type brake, it is small that application can break previous disk type brake brake contact face, the small disadvantage of brake weight, increases
Large access area improves braking to effectively improve braking moment.Simultaneously in application ESP technology, this application can be in ESP
Brake force kept for the stage accomplish to reduce brake force, to restore unilateral wheel lock up state, improve the sound for preventing sideslip system
Efficiency is answered, accomplishes more accurately dynamic equilibrium vehicle body function.
Claims (9)
1. a kind of secondary emergency brake arrangement of vehicle, it is characterised in that: including
Motor, the motor is as dynamic structure for providing brake weight；
Axis is braked, the braking axis connects motor as drive mechanism, positive and negative rotation can rotate under motor drive；
Braking push top, the braking push top can be realized reciprocal as brake structure connection braking axis in the case where braking axis drives
Movement, and then the brake component for acting on vehicle realizes brake.
2. a kind of secondary emergency brake arrangement of vehicle as described in claim 1, it is characterised in that: the braking push top is two
It is a, it is respectively placed in braking axis both ends.
3. a kind of secondary emergency brake arrangement of vehicle as claimed in claim 2, it is characterised in that: braking push top one end
It is threadedly engaged with the supporting element being fixed on vehicle, the other end is engaged with the gear being arranged on braking axis, by the braking
Axis drives braking push top rotation by gear, realizes straight line simultaneously under screw-driven promotion when braking push top positive and negative rotation rotation
It moves back and forth.
4. a kind of secondary emergency brake arrangement of vehicle as claimed in claim 3, it is characterised in that: the motor passes through gear
Drive the braking central axis.
5. a kind of secondary emergency brake arrangement of vehicle as described in claim 1, it is characterised in that: the motor is direct current
Machine.
6. a kind of brake method of any one of Claims 1 to 5 brake gear, it is characterised in that: by being installed additional in vehicle
One delay chip automatically turns on timing after vehicle brake pedal moves, after by a setting time T,
Wheel speed does not drop, then so that braking push top is stretched out extruding brake component for electrical power and provide brake force；If wheel speed reduction is too low, then instead
Braking push top is retracted to energization, wheel speed is gone up, and so on, until vehicle is braked completely.
7. brake method as claimed in claim 6, it is characterised in that: by control it is described braking push top the unit time in into
To amount, it is identical as the amount of feeding of hydraulic cylinder in vehicle original braking system to make it, to make the brake gear can be with former braking system
Share a set of ABS system.
8. a kind of anti-escape system, it is characterised in that: including brake gear as claimed in any one of claims 1 to 5, channel radio
Believe module, control module, is transmitted to control module after remotely receiving instruction by the wireless communication module, control module is according to finger
The motor operating state for controlling the brake gear is enabled, realizes the long-range braking of vehicle.
9. a kind of anti-escape system, it is characterised in that: the anti-escape collision system is applied to net about vehicle, wireless communication module
Connect police monitor supervision platform or net about vehicle platform.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811253323.6A CN109131267B (en) | 2018-10-25 | 2018-10-25 | Secondary emergency braking device, braking method and escape prevention system for vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811253323.6A CN109131267B (en) | 2018-10-25 | 2018-10-25 | Secondary emergency braking device, braking method and escape prevention system for vehicle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109131267A true CN109131267A (en) | 2019-01-04 |
| CN109131267B CN109131267B (en) | 2024-01-19 |
Family
ID=64810000
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811253323.6A Active CN109131267B (en) | 2018-10-25 | 2018-10-25 | Secondary emergency braking device, braking method and escape prevention system for vehicle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109131267B (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1613700A (en) * | 2004-10-05 | 2005-05-11 | 梁裕新 | Intermediate braking method and braker for preventing motor-vehicle from half fault |
| CN101186201A (en) * | 2007-06-15 | 2008-05-28 | 田青锋 | Emergency brake pedal |
| CN202783172U (en) * | 2012-08-14 | 2013-03-13 | 上海英伦帝华汽车部件有限公司 | Vehicle braking auxiliary system |
| CN104071137A (en) * | 2014-07-17 | 2014-10-01 | 游元昆 | Automobile antiskid device |
| CN205149832U (en) * | 2015-12-08 | 2016-04-13 | 四川建筑职业技术学院 | Help braking auxiliary system based on ABS anti -lock braking system |
| US20160375347A1 (en) * | 2014-01-24 | 2016-12-29 | Rollersafe As | System And Method For Regulated And/Or Limited Speed Control |
| CN106864432A (en) * | 2017-01-20 | 2017-06-20 | 南京航空航天大学 | A kind of braking automobile failure emergency braking apparatus and its control method |
| CN207634560U (en) * | 2017-12-26 | 2018-07-20 | 青岛芊亿祺机械制造有限公司 | The brake shoes of secondary braking |
| CN211335931U (en) * | 2018-10-25 | 2020-08-25 | 张强 | Secondary emergency brake device of vehicle |
-
2018
- 2018-10-25 CN CN201811253323.6A patent/CN109131267B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1613700A (en) * | 2004-10-05 | 2005-05-11 | 梁裕新 | Intermediate braking method and braker for preventing motor-vehicle from half fault |
| CN101186201A (en) * | 2007-06-15 | 2008-05-28 | 田青锋 | Emergency brake pedal |
| CN202783172U (en) * | 2012-08-14 | 2013-03-13 | 上海英伦帝华汽车部件有限公司 | Vehicle braking auxiliary system |
| US20160375347A1 (en) * | 2014-01-24 | 2016-12-29 | Rollersafe As | System And Method For Regulated And/Or Limited Speed Control |
| CN104071137A (en) * | 2014-07-17 | 2014-10-01 | 游元昆 | Automobile antiskid device |
| CN205149832U (en) * | 2015-12-08 | 2016-04-13 | 四川建筑职业技术学院 | Help braking auxiliary system based on ABS anti -lock braking system |
| CN106864432A (en) * | 2017-01-20 | 2017-06-20 | 南京航空航天大学 | A kind of braking automobile failure emergency braking apparatus and its control method |
| CN207634560U (en) * | 2017-12-26 | 2018-07-20 | 青岛芊亿祺机械制造有限公司 | The brake shoes of secondary braking |
| CN211335931U (en) * | 2018-10-25 | 2020-08-25 | 张强 | Secondary emergency brake device of vehicle |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109131267B (en) | 2024-01-19 |
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