CN204605408U - A kind of automobile short range auxiliary emergent brake system - Google Patents
A kind of automobile short range auxiliary emergent brake system Download PDFInfo
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- CN204605408U CN204605408U CN201520284668.3U CN201520284668U CN204605408U CN 204605408 U CN204605408 U CN 204605408U CN 201520284668 U CN201520284668 U CN 201520284668U CN 204605408 U CN204605408 U CN 204605408U
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- adhesive agent
- brake system
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Abstract
The utility model discloses a kind of short range auxiliary emergent brake system, judge whether vehicle inevitable severe crash can occur with obstacle by Central Processing Unit (CPU), when inevitable severe crash can be there is in judgement, consider current road condition information, the adhesive agent forming suitable current road is selected by the adhesive agent shaper in system actuators, instantaneously adhesive agent is ejected on wheel tyre surface and road surface via the adhesive agent eductor pressurization in actr, improve the automobile braking force that ground provides, coordinate vehicle primary brake system, significantly shorten the stopping distance of automobile, ensure that the safety of automobile, simultaneously by controlling the adhesive agent eductor jet binder dosage being arranged on different wheel, realize the control to vehicle attitude, prevent vehicle from serious sideslip and upset occurring, add the stability of automobile.
Description
Technical field
The utility model relates to automobile brake technical field, is specifically related to a kind of short range auxiliary emergent brake system.
Background technology
Good deceleration and stopping performance is the important leverage of vehicle safety travel.The deceleration and stopping performance of automobile is directly connected to safety traffic, and great traffic accident is often oversize with stopping distance relevant, and the length of stopping distance depends on the size of braking force.The external force contrary with travel direction required during automobile brake is mainly provided by ground and air.But from automobile, braking stops to automobile, and the resistance that air can provide is relatively little, can ignore, so braking force is mainly provided by ground braking force.The ground braking force of automobile depends on the braking force of drg, simultaneously by ground attachment condition, the i.e. restriction of tire-ground friction coefficient, so only have when automobile has enough brake braking forces, when providing the friction coefficient between high tire and ground, guarantee obtains enough large ground braking force simultaneously.In braking procedure, after lock torque exceeds the maximum adhesion limit on ground, ground braking force will reduce.
Chinese patent " a kind of automobile short range braking control device and adopt the automobile short range brake control method (CN102463970 A) of this device " discloses a kind of short range braking control device and short range brake control method.This device, by reducing the pressure of motor tire, increases the area of contact on tire and ground, and then increases frictional ground force, thus shortens the stopping distance of automobile.Chinese patent " a kind of sure brake system and the self-propelled vehicle (CN 104002778 A) with auxiliary security brake system " discloses a kind of sure brake system.When brake of motor-driven vehicle is malfunctioning, to lose control of one's vehicle or truck mounted braking systems can not meet braking when, this system, by starting the telescoping support mechanism and friction component that are arranged on car chassis, realizes powerful brake snub, and then shortens stopping distance.But these auxiliary emergency brake systems all cannot break through road surface attachment condition, i.e. the restriction of friction coefficient between tire and ground.
The widespread use of computer technology, the intellectuality for automobile provides wide prospect.In recent years, the focus of world's Vehicle Engineering research mainly concentrates in intelligent vehicle research and development.Intelligent vehicle is the system ensemble that integrates environment sensing, programmed decision-making, many grades assist the functions such as driving, and it is concentrated and has used computing machine, modern sensing, information fusion, communication, artificial intelligence and the technology such as control automatically.The data-handling capacity of vehicle will obtain qualitative leap, and useful information extracts and effectively processes fast and will provide advantage for vehicle functions improves.
Utility model content
The utility model object is to provide a kind of short range auxiliary emergent brake system, break through the restriction of friction coefficient between tire and ground, improve the adhesive ability between tire and ground, realize significantly shortening the stopping distance of automobile under extreme case, technical scheme is as follows:
A kind of automobile short range auxiliary emergent brake system, primarily of Central Processing Unit (CPU) and respectively coupled sensor and actr composition, described actr is made up of adhesive agent shaper and adhesive agent eductor, and to be integratedly arranged on the car body of wheel front, be convenient to adhesive agent that adhesive agent eductor ejects and be attached on the surface that to be about between tire with road surface contact simultaneously.
Further, described sensor comprises rang sensor, acceleration pick-up, car speed sensor and road conditions sensor.
A nearlyer step, be arranged on the described actr on the wheel front car body of diverse location, the nozzle scope of its adhesive agent eductor injection cock is different, and the angle of spray scope being arranged on the adhesive agent injector nozzle of steered wheel is greater than the angle of spray scope being arranged on non-steered wheel injector nozzle.
Design background of the present utility model is to improve the coefficientoffrictionμ between vehicle tyre and ground, makes μ break through 1, and then greatly improves the adhesive ability between vehicle and ground, greatly reduce stopping distance.Major design principle of the present utility model is by the Signal transmissions between sensor and master control system and process, state residing for vehicle is judged, when confirming to be about to inevitable severe crash occurs, master control system sends instruction to actr.The utility model is by improving coefficientoffrictionμ between vehicle tyre and ground to jet binder between vehicle tyre and ground, so the actr in the utility model is a kind of can generation and the device of jet binder, comprise adhesive agent shaper and adhesive agent eductor.
The beneficial effects of the utility model are:
The utility model is by being ejected into wheel tyre surface and road surface by adhesive agent, thus break through the restriction of road surface attachment condition, improve the ground braking force of automobile, coordinate the main brake system of vehicle, significantly shorten the stopping distance of automobile under extreme case, ensure that the safety of automobile; In addition, the binder amount of being sprayed by the adhesive agent eductor controlling to be arranged on different wheel, is realized the control to vehicle attitude, prevents vehicle from serious sideslip and upset occurring, add the stability of automobile.
Accompanying drawing explanation
Fig. 1 is basic control system structured flowchart of the present utility model;
Fig. 2 is the scheme of installation of actr of the present utility model;
Fig. 3 is basic controlling principle of work block diagram of the present utility model;
Fig. 4 a is the angle of spray scope schematic diagram of the adhesive agent injector nozzle be arranged on the car body of steered wheel front;
Fig. 4 b is the angle of spray scope schematic diagram of the adhesive agent injector nozzle be arranged on the car body of non-steered wheel front;
Fig. 5 is the desirable braking effect comparison diagram whether the utility model starts.
In figure:
1-wheel, 2-actr, 3-car body.
Detailed description of the invention
Describe the utility model brake system in detail below in conjunction with accompanying drawing, and by embodiment, specific implementation process of the present utility model is described further.
As shown in Figure 1, the utility model discloses a kind of short range auxiliary emergent brake system, comprise the integrated actr 2 of Central Processing Unit (CPU), adhesive agent eductor and adhesive agent shaper, rang sensor, acceleration pick-up, car speed sensor and road conditions sensor.Wherein, rang sensor is mainly for detection of the distance between driving vehicle and preceding object thing or vehicle, and the forms such as the sound wave sent by trailer-mounted radar or the image of camera collection are detected; Acceleration pick-up, the braking deceleration of vehicle when being used for detecting braking; Road conditions sensor is used for detecting the situation on road surface residing for current automobile, as highway, cement concrete, sand-graved road and dirt road etc., mainly by image procossing and the sonic detection of intelligence, then obtain current traffic information in conjunction with data analysis such as braking accelerations, or height intellectualization times obtains current traffic information by high in the clouds; Car speed sensor, is used for detecting the speed of Current vehicle.Described Central Processing Unit (CPU) is mainly used to accept to detect data, and carries out computational analysis, judges whether the actr needing to start this cover short range auxiliary emergent brake system.Described adhesive agent eductor is braked Central Processing Unit (CPU) with adhesive agent shaper and short range secondary emergency and is connected, and described rang sensor, acceleration pick-up, car speed sensor are braked Central Processing Unit (CPU) with road conditions sensor and short range secondary emergency and be connected.
In addition, improve the safe reliability of whole auxiliary braking system, native system is also furnished with failure diagnosis unit, primarily of fault diagnosis circuit, forces start-stop button and alarming singal lights composition.Whether alarming singal lights main cue chaufeur short range auxiliary emergent brake system exists fault; Start-stop button is forced to be mainly used in chaufeur enforced opening or to close short range auxiliary emergent brake system.
As shown in Figure 2, adhesive agent eductor is connected with car body 3 with after the integrated assembling of adhesive agent shaper, and it is arranged on position, wheel 1 dead ahead, is convenient to eject adhesive agent and can be ejected between wheel tyre surface and road surface simultaneously during emergency braking.The different components forming adhesive agent did not possess viscosity before mutually mixing, and is mixed, make it to have stronger adhesion, be then fed to adhesive agent eductor by adhesive agent shaper.The adhesive agent that adhesive agent eductor mainly will mix, pressurization, is ejected on motor tire and road surface by injector nozzle.In addition, because the more non-steered wheel of steered wheel has certain steering angle, as shown in figures 4 a and 4b, the angle of spray scope being arranged on the adhesive agent injector nozzle of steered wheel is larger than the angle of spray scope being arranged on non-steered wheel injector nozzle.
The braking method of brake system of the present utility model is by after determining that vehicle is about to that inevitable severe crash occurs, command executer to jet binder on the surface being about between tire with road surface contact, and then improves the maximum friction coefficient between tire and road surface.
It is to be noted, brake system of the present utility model only just can be enabled when last resort, because the adhesive agent that the utility model device ejects after starting will cause certain destruction to the tire of automobile and road surface, the turning efficiency of vehicle will be affected simultaneously.The utility model auxiliary braking system can be made and judging very accurately under the collision situation of complexity, and the actr Startup time of short range auxiliary emergent brake system also must accurately control.
In addition, before each this brake system of startup, Central Processing Unit (CPU), sensor and actr will carry out customary self-inspection, to guarantee system worked well.If there is fault, alarming singal lights reminds chaufeur: short range auxiliary emergent brake system breaks down, and chaufeur will be closed by force as the case may be or open brake system.
As shown in Figure 3, the concrete steps of the braking procedure of brake system of the present utility model are as follows:
Step one: the threshold value V of relative speed of a motor vehicle during setting collision
thstep-length number N needed for judging with prediction, N is integer, wherein, characterizes whether with obstacle, serious collision and crash severity can occur during collision relative to speed of a motor vehicle threshold, surveys the conservative of the step-length number characterization system prediction needed for judging.
Step 2: judge whether vehicle is about to inevitable severe crash occurs, the current vehicle speed obtained with the distance of obstacle, car speed sensor that Central Processing Unit (CPU) is detected by rang sensor and the braking deceleration that acceleration pick-up detects, in i-th sampling step length, the calculated signals that Central Processing Unit (CPU) detects according to current sensor, dopes vehicle velocity V during collision
ibe greater than the threshold value V of the relative speed of a motor vehicle during collision of setting
th, simultaneously thisly to predict the outcome at an ensuing continuous print N-1 sampling step length all unanimously, namely dope relative speed of a motor vehicle sequence V when colliding
i, V
i+1v
i+N-1all exceed the threshold value V of relative speed of a motor vehicle during collision
th, the threshold value V of relative speed of a motor vehicle when vehicle velocity V when at this moment Accurate Prediction goes out to collide exceedes collision
th, wherein, i is integer, and described sampling step length refers to sampling time interval, and sampling time interval is the integral multiple of 1ms.
The sampling time interval that automobile middle control system is general is Millisecond, and that the most frequently used is 1ms, 5ms, 10ms and 100ms.N number of step-length is exactly N number of sampling time interval.Relative vehicle velocity V when Central Processing Unit (CPU) dopes collision
i, V
i+1v
i+N-1all exceed the threshold value V of relative speed of a motor vehicle during collision
thnamely Central Processing Unit (CPU) to predict the outcome within a period of time (a N continuous sampling time interval) consistent, the interfering signal occurred in testing process can be got rid of like this, the comparatively conservative threshold value V doping relative speed of a motor vehicle when exceeding collision relative to vehicle velocity V when colliding
th, namely Central Processing Unit (CPU) predicts and inevitable severe crash will occur.
About choosing of N value: N is larger, Central Processing Unit (CPU) judges more conservative, judgement more accurate, if there is emergency situation, whole system is because the longer overall action effect of time delay is just limited.On the contrary, N is less, and it is more radical that Central Processing Unit (CPU) judges, judged result may be wrong, if there is emergency situation, whole system is because the shorter overall action effect of time delay is just fine.N value mainly should consider the overall measure of precision of equipment and required safe class, specifically can choose, as the integral multiple of 10 according to the actual experiment situation of different automobile types.
Step 3: first the adhesive agent shaper of actr receives enabled instruction, then according to the road conditions signal that road conditions sensor detects, as highway, cement concrete, sand-graved road and dirt road etc., proportioning is carried out to adhesive agent constituent and mixes, form the adhesive agent being applicable to current road conditions, finally adhesive agent is flowed to adhesive agent eductor;
Step 4: the adhesive agent that adhesive agent eductor will mix, pressurization, be ejected into by the surface contacted between tire with road surface, the maximum friction coefficient between increase tire and ground, realizes brake snub.
This auxiliary braking system and braking method are also furnished with failure diagnosis unit:
After each parking, the electronic unit of Central Processing Unit (CPU) and actr carries out customary self-inspection, to guarantee system worked well, if there is fault, this cover ancillary system is closed, conventional brake system still normally works, the chaufeur of alarm signal prompting simultaneously: short range auxiliary emergent brake system breaks down.
Each parts of system, Central Processing Unit (CPU), actr, sensor, each parts is furnished with diagnostic circuit, such as: Central Processing Unit (CPU) mainly electronic control unit has a set of stand-by system, this system is made up of two identical microprocessors, if identical signal input, the judgement signal that two microprocessors are made is inconsistent, be then diagnosed as microprocessor malfunctions.
There is fault when diagnosing out, described alarm signal will remind chaufeur, and chaufeur is by forcing brake system described in start-stop button hard closing, and when after failture evacuation, chaufeur is by forcing brake system described in start-stop button enforced opening.This failure diagnostic process can effectively prevent brake system from making false judgment because of et out of order, opens short range auxiliary emergent brake system by mistake, makes the ejection that adhesive agent is unnecessary, and road pavement and tire cause damage.
Of the present utility modelly significantly shorten being described as follows of the stopping distance of automobile under extreme case:
Fig. 5 starts the actr braking effect comparison diagram desirable with the vehicle not starting the utility model short range auxiliary emergent brake system actr of the utility model short range auxiliary emergent brake system when being braking.Suppose that automobile can make full use of ground attachment condition, do not consider automobile lateral stability, automobile is at t
0moment starts emergency braking, current attachment condition is certain, automobile is through main brake system, the maximum braking force that a constant ground does to provide can be subject to, if be not activated the actr of the utility model short range auxiliary emergent brake system, automobile can underspeed under constant deceleration/decel, and braking deceleration is at this moment a number being less than or equal to 1 acceleration due to gravity, arrives t
bin the moment, automobile and obstacle collide, if now speed v
bbe greater than certain value, then automobile belongs to severe crash.But, if automobile is at t
amoment is judged inevitable severe crash will occur, start the actr of the utility model short range auxiliary emergent brake system, the heterogeneity of adhesive agent mixes by adhesive agent shaper, the adhesive agent mixed is ejected into wheel tyre surface and road surface by cohesiveness eductor, the adhesive agent being ejected into motor tire and road surface due to adhesive agent injector nozzle makes the adhesion value on road surface be greater than 1, the braking force of automobile can significantly increase, thus braking deceleration becomes the number larger than 1 acceleration due to gravity, the speed of automobile can decline rapidly, at t
cmoment stops, thus avoids the collision between vehicle and obstacle.Contrast two curves, the stopping distance that in Fig. 5, dash area can shorten for a kind of short range auxiliary emergent brake system of the present utility model can be found out.
Below in conjunction with concrete display briefing specific implementation process of the present utility model:
Embodiment 1:
Relative speed of a motor vehicle threshold value V when being set in collision
thbe 30 kilometers/hour, the step-length number N needed for prediction judges is 10.Travelling in the car A speed of express highway is 90 kilometers/hour, its front car B prepares entrance ramp, slow down, because car A tired driver is driven, there is absent-minded situation, car A driver did not also return god, the vehicle having installed the utility model short range auxiliary emergent brake system carries out data analysis calculating according to the Central Processing Unit (CPU) of this auxiliary braking system according to the rate of change of vehicle speed, braking deceleration and obstacle distance and distance, predict vehicle and inevitable collision will occur, and relative vehicle velocity V during collision is more than V
th(30 kilometers/hour), this to predict the outcome in 10 continuous step-lengths consistent, at this moment, Central Processing Unit (CPU) is issued an order to the actr of brake system, start the actr of the utility model short range auxiliary emergent brake system, the heterogeneity of adhesive agent mixes by the adhesive agent shaper of actr, the adhesive agent mixed is ejected into wheel tyre surface and road surface by cohesiveness eductor, friction coefficient instantaneously between vehicle tyre and ground breaks through 1, now driver is due to the very large change of the friction coefficient between vehicle tyre and ground, recognize and will have an accident, suddenly brake pedal is stepped on, now drg produces huge braking force, the quick reduction of speed of vehicle, thus severe crash is avoided, ensure the safety of driver.
Embodiment 2:
Relative speed of a motor vehicle threshold value V when being set in collision
th: the relative speed of a motor vehicle threshold value V1 during collision of truck
thbe 24 kilometers/hour, the step-length number N1 needed for prediction judges is 15; The relative speed of a motor vehicle threshold value V2 during collision of car
thbe 30 kilometers/hour, the step-length number N2 needed for prediction judges is 15.Travelling is 110 kilometers/hour in the truck C speed of express highway, and lorry D above overtakes other vehicles due to lane change, and a large cargo above falls down, and truck C is about to encounter front goods with very high speed.The vehicle of the utility model short range auxiliary emergent brake system has been installed, Central Processing Unit (CPU) carries out data analysis calculating based on the rate of change of the vehicle speed received, braking deceleration and obstacle distance and distance, predict vehicle and inevitable severe crash will occur, and the vehicle velocity V 1 of relative obstacle during collision is more than V
th(24 kilometers/hour), this to predict the outcome in 15 continuous step-lengths consistent, at this moment, Central Processing Unit (CPU) is issued an order to the actr of brake system, start the actr of the utility model short range auxiliary emergent brake system, the heterogeneity of adhesive agent mixes by the adhesive agent shaper of actr, the adhesive agent mixed is ejected into wheel tyre surface and road surface by cohesiveness eductor, friction coefficient instantaneously between vehicle tyre and ground breaks through 1, in conjunction with the huge braking force that drg produces, the quick reduction of speed of vehicle, prevent vehicle and obstacle from serious collision occurring.
Now, by chance block the visual field of chaufeur immediately following truck C car E below due to truck, do not observe the landing of front large cargo, front truck C has very short stopping distance simultaneously, because car E there are also installed the utility model short range auxiliary emergent brake system, Central Processing Unit (CPU), through the computational analysis of signal, predicts vehicle and inevitable collision will occur, and the vehicle velocity V 2 of relative obstacle during collision is more than V
th(30 kilometers/hour), this to predict the outcome in 10 continuous step-lengths consistent, at this moment, Central Processing Unit (CPU) is issued an order to the actr of brake system, start the actr of the utility model short range auxiliary emergent brake system, the heterogeneity of adhesive agent mixes by the adhesive agent shaper of actr, the adhesive agent mixed is ejected into wheel tyre surface and road surface by cohesiveness eductor, friction coefficient instantaneously between vehicle tyre and ground breaks through 1, in conjunction with the huge braking force that drg produces, the quick reduction of speed of vehicle, prevent vehicle and front truck C from serious collision occurring, ensure the safety of driver.
Claims (3)
1. an automobile short range auxiliary emergent brake system, primarily of Central Processing Unit (CPU) and respectively coupled sensor and actr composition, it is characterized in that: described actr is made up of adhesive agent shaper and adhesive agent eductor, and to be integratedly arranged on the car body of wheel front, be convenient to adhesive agent that adhesive agent eductor ejects and be attached on the surface that to be about between tire with road surface contact simultaneously.
2. a kind of automobile short range auxiliary emergent brake system as claimed in claim 1, is characterized in that: described sensor comprises rang sensor, acceleration pick-up, car speed sensor and road conditions sensor.
3. a kind of automobile short range auxiliary emergent brake system as claimed in claim 1 or 2, it is characterized in that: be arranged on the described actr on the wheel front car body of diverse location, the nozzle scope of its adhesive agent eductor injection cock is different, and the angle of spray scope being arranged on the adhesive agent injector nozzle of steered wheel is greater than the angle of spray scope being arranged on non-steered wheel injector nozzle.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520284668.3U CN204605408U (en) | 2015-05-05 | 2015-05-05 | A kind of automobile short range auxiliary emergent brake system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520284668.3U CN204605408U (en) | 2015-05-05 | 2015-05-05 | A kind of automobile short range auxiliary emergent brake system |
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| CN204605408U true CN204605408U (en) | 2015-09-02 |
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| CN201520284668.3U Expired - Fee Related CN204605408U (en) | 2015-05-05 | 2015-05-05 | A kind of automobile short range auxiliary emergent brake system |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104842714A (en) * | 2015-05-05 | 2015-08-19 | 吉林大学 | Automotive short-distance auxiliary emergency braking system and braking method thereof |
| CN105818771A (en) * | 2016-04-19 | 2016-08-03 | 谢奇 | Vehicle attitude control method and system based on thrust devices |
| CN107176004A (en) * | 2016-03-10 | 2017-09-19 | 宝沃汽车（中国）有限公司 | Suspension control method, suspension control apparatus and the vehicle with the device |
| CN116176317A (en) * | 2023-04-23 | 2023-05-30 | 成都市汇智讯新能源科技有限公司 | New energy automobile charging pile and running state early warning method thereof |
-
2015
- 2015-05-05 CN CN201520284668.3U patent/CN204605408U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104842714A (en) * | 2015-05-05 | 2015-08-19 | 吉林大学 | Automotive short-distance auxiliary emergency braking system and braking method thereof |
| CN104842714B (en) * | 2015-05-05 | 2017-03-01 | 吉林大学 | A kind of automobile short distance auxiliary emergent brake system and its braking method |
| CN107176004A (en) * | 2016-03-10 | 2017-09-19 | 宝沃汽车（中国）有限公司 | Suspension control method, suspension control apparatus and the vehicle with the device |
| CN107176004B (en) * | 2016-03-10 | 2020-06-02 | 宝沃汽车（中国）有限公司 | Suspension control method, suspension control device and vehicle with suspension control device |
| CN105818771A (en) * | 2016-04-19 | 2016-08-03 | 谢奇 | Vehicle attitude control method and system based on thrust devices |
| CN116176317A (en) * | 2023-04-23 | 2023-05-30 | 成都市汇智讯新能源科技有限公司 | New energy automobile charging pile and running state early warning method thereof |
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| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150902 Termination date: 20180505 |
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| CF01 | Termination of patent right due to non-payment of annual fee |