CN1699098A - Synchronous air brake system controlled by electric current - Google Patents
Synchronous air brake system controlled by electric current Download PDFInfo
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- CN1699098A CN1699098A CN 200510011918 CN200510011918A CN1699098A CN 1699098 A CN1699098 A CN 1699098A CN 200510011918 CN200510011918 CN 200510011918 CN 200510011918 A CN200510011918 A CN 200510011918A CN 1699098 A CN1699098 A CN 1699098A
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- 230000001360 synchronised effect Effects 0.000 title claims abstract description 30
- 239000000919 ceramic Substances 0.000 claims description 14
- 230000005540 biological transmission Effects 0.000 abstract description 10
- 230000001934 delay Effects 0.000 abstract 1
- 230000009471 action Effects 0.000 description 11
- 238000005259 measurement Methods 0.000 description 4
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 206010039203 Road traffic accident Diseases 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 230000003321 amplification Effects 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000000994 depressogenic effect Effects 0.000 description 1
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Abstract
This invention relates to an electric control synchronous coordinate air-pressure brake system, which provides a new air-pressure brake technology project controlled by electric signal. When the front wheel brakes, the front gas reservoir compresses air and enters the front brake air cushion through the brake valve, the first electric pressure transformer turns the pressure that output by the brake valve into the electric signal, and the single flake intelligent control deals with the back pressure electric valve to output the pressure signal that controls the open of the relay valve, the compressed air in back gas reservoir enters the back braking air chamber to achieve the back wheel braking. The output end of the pressure electric valve has the second electric pressure transformer, which turns the output pressure into the electric signal, and sends the signal back to the control to form the closed-loop control circuit, which makes the front braking air chamber consistent to the back braking air chamber. Because the telecommunication transmission seldom delays, so this invention achieves the real synchronous coordinate braking.
Description
Technical field
The present invention relates to compression air brake, particularly relate to length by little electric current The synchronized Coordinative Control apart from Pneumatic braking system.
Background technology
Big-and-middle-sized automobile, train, Urban Light Rail Vehicle etc. generally adopt compression air brake, but such as superimposed trailer, independent trailer etc. in when brake, often take place to collide before and after tractor truck and the trailer, upspring, sideslip, whipping, fold even rollover phenomenon, cause traffic accident.Trace it to its cause, drag is asynchronous, inharmonious before and after mainly causes.Existing compression air brake is that chaufeur is trampled braking vane unlatching brake valve, the gas that brake valve varies in size according to foot-operated dynamics direct ratio delivery pressure, and gas is clipped to by tracheorrhaphy and reaches front-wheel and trailing wheel.Gas directly enters the front-wheel air chamber and promotes connecting rod enforcement front wheel brake.Gas arrives the relay valve that is positioned at trailing wheel by tracheae, opens to connect back storage tank valve, and the gas of air receiver enters trailing wheel air chamber promotion connecting rod and implements the trailing wheel braking.Survey factually, the car that wheel base is 13 meters, the trailing wheel braking maneuver postpones about 0.6 second than front-wheel.Although relay valve has certain amplification, because of the asynchronous problem that causes still clearly.Front and back wheel braking time difference has caused front wheel brake, and trailing wheel is also rotating, because effect of inertia, trailer continues preshoot, so cause aforementioned collision, upspring, sideslip, whipping, folding even rollover phenomenon, cause traffic accident.
Summary of the invention
The objective of the invention is to brake nonsynchronous technical matters at long wheelbase vehicle front and back wheel in the prior art, a kind of current control Pneumatic braking system that makes the braking of automobile front and back wheel synchronous coordination is provided, improved automobile brake perfrmance comprehensively, eliminated greatly because of braking the asynchronous potential safety hazard that causes.
Technical conceive of the present invention is:
The present invention substitutes the transmission of traditional air pressure control signal with the transmission of current controling signal between preceding brake unit of isolating mutually and back brake unit, with be arranged at described before the current signal that obtains of first current pressure sensor on the brake unit air pressure bang path as control signal, because the current signal speed of transmission is fast, time difference in short range ignores, the brake control signal that forward and backward brake unit is received remains on synchronization substantially, has realized the front and back wheel synchronous braking to greatest extent; Simultaneously, utilize the controlled reset of current signal, the braking pressure of forward and backward compressed air brake cylinder is consistent, realize synchronous coordination braking truly.
Technical scheme of the present invention is:
A kind of synchronous air brake system controlled by electric current, brake unit and back brake unit before comprising, it is characterized in that: also comprise and described before brake unit and back brake unit bonded assembly current control unit, described current control unit by be arranged at described before the current signal that obtains of first current pressure sensor on the brake unit air pressure bang path as the control signal of the described back of control brake unit.
Brake unit comprises the preceding storage tank of bonded assembly, brake valve and preceding compressed air brake cylinder successively before described; Described back brake unit comprises successively storage tank behind the bonded assembly, relay valve and back compressed air brake cylinder; The current signal that described current control unit obtains by first current pressure sensor that is arranged at described brake valve mouth is as the control signal of control relay valve.
Described current control unit comprises the micro controller system intelligent controller, and described controller receives the current signal of first current pressure sensor and exports control signal and give piezo electric valve, by piezo electric valve control relay valve.
Described first current pressure sensor is the piezoelectric ceramics body.
Described piezoelectric ceramics body is exported little electric current that the air pressure of 0～0.8MPa is converted into 4～20mA in proportion to controller.
Described piezo electric valve is the proportion expression piezo electric valve.
The delay of brake unit and back brake unit synchronous braking is in 0.01 second before described.
Described current control unit also comprises a reactive circuit that the braking pressure of described forward and backward compressed air brake cylinder is consistent, and described reactive circuit connects the mouth of controller and piezo electric valve.
Described reactive circuit comprises that one gathers second current pressure sensor of piezo electric valve mouth air pressure, and described second current pressure sensor feeds back to controller with little current signal of 4～20mA.
Described second current pressure sensor is the piezoelectric ceramics body.
Technique effect of the present invention is:
The present invention proposes a kind of technical scheme of brand new electric current-Pneumatic braking system, the preceding brake unit and the back brake unit that utilize Current Control Technology to isolate are mutually realized synchronous braking control by current control unit, realize the front and back wheel synchronous braking to greatest extent, solved the technical matters that the intrinsic trailing wheel of traditional Pneumatic braking system lags behind and brakes.Current control unit of the present invention by be arranged at described before the current signal that obtains of first current pressure sensor on the brake unit air pressure bang path as control signal, controller output control signal is given piezo electric valve, electric signal is reduced to corresponding air pressure signal like this, the breakdown action of piezo electric valve output pressure signal control relay valve has substituted the transmission of traditional air pressure control signal with the transmission of current controling signal.Simultaneously, reactive circuit utilizes the controlled reset of current signal, forms closed control circuit, and the braking pressure of forward and backward compressed air brake cylinder is consistent.Because the current signal speed of transmission is fast, the time difference in short range ignores, and front and back wheel realizes synchronous coordination braking truly, thereby brakes asynchronous problem fundamentally solving front and back wheel, has eliminated potential safety hazard greatly.Experimental measurement is the result show, the car that wheel base is 13 meters, the trailing wheel braking maneuver that adopts technical solution of the present invention than the delay of front wheel brake action less than 0.01 second.
In preferred version of the present invention, current pressure sensor adopts has piezoelectric ceramics bodies highly sensitive, characteristics such as response frequency is fast, volume is little, in light weight, reliability height, both can measure dynamic air pressure exactly, setting measurement position according to actual needs makes the present invention can be widely used in using all kinds of big-and-middle-sized automobile, train, the Urban Light Rail Vehicle of gas braking again.
Technical solution of the present invention has made full use of the structure of existing Pneumatic braking system, does not need existing pipeline is carried out large-scale redevelopment, and connecting current control unit between forward and backward brake unit can finish, and has that cost is low, the obvious results characteristics.Current control unit of the present invention both can have been born the synchro control of front and back wheel alone, again can with traditional Pneumatic braking system co-operation, realize the two redundant of control of braking, improve the reliability of automobile brake control to greatest extent, thoroughly eliminate because of braking asynchronous caused potential safety hazard.
Obviously, the present invention also has more the functional character of in-depth and application prospect widely.For example, the present invention also can cooperate with the ABS anti-skid brake system that is provided with on the automobile and other safety system, the safety control of the wider meaning of realization.
Description of drawings
Fig. 1 is a structural representation of the present invention.
Mark lists as follows among the figure:
The 1-braking vane; Brake unit before the 2-; Storage tank before the 21-; The 22-brake valve; Compressed air brake cylinder before the 23-; The 3-voltage control unit; 31-first current pressure sensor; The 32-controller; The 33-piezo electric valve; 34-second current pressure sensor; Brake unit behind the 4-; Storage tank behind the 41-; The 42-relay valve; Compressed air brake cylinder behind the 43-; The 5-air compressor; 6-gas transmission pipeline; The 7-electrical signal transmission line.
The specific embodiment
Describe technical scheme of the present invention in detail below in conjunction with accompanying drawing.
Fig. 1 is a structural representation of the present invention.As shown in Figure 1, synchronous air brake system controlled by electric current of the present invention is made up of brake unit 2, current control unit 3 and back brake unit 4 before the bonded assembly successively.Preceding brake unit 2 comprises the preceding storage tank 21 of bonded assembly, brake valve 22 and preceding compressed air brake cylinder 23 successively.When automobile driver depressed brake valve 22, the pressurized air of the preceding storage tank 21 that is communicated with air compressor 5 entered compressed air brake cylinder 23 by brake valve 22, and the action of front brake push rod promotes adjusting arm and brakes.Back brake unit 4 comprises successively storage tank 41 behind the bonded assembly, relay valve 42 and back compressed air brake cylinder 43.Relay valve 42 is opened according to the gas signal of input, and the pressurized air that is communicated with back storage tank 41 enters compressed air brake cylinder 43 by relay valve 42, and the action of rear brake push rod promotes adjusting arm and brakes.
Core of the present invention is to be provided with the current control unit 3 that guarantees the action of front and back brake synchronous coordination between preceding brake unit 2 and back brake unit 4, more particularly, described back brake unit 4 is controlled as control signal by the current signal that first current pressure sensor 31 that is arranged on the described preceding brake unit 2 air pressure bang paths obtains by current control unit 3.Current control unit 3 comprises bonded assembly first current pressure sensor 31, micro controller system intelligent controller 32 and piezo electric valve 33 successively, and wherein said first current pressure sensor 31 is arranged on the mouth of brake valve 22, and piezo electric valve 33 is connected with relay valve 42.The output pressure parameter that first current pressure sensor 31 is gathered brake valve 22, and to controller 32 output current signals; Controller 32 is exported control signals to piezo electric valve 33 after handling described current signal, and electric signal is reduced to corresponding air pressure signal like this, the breakdown action of piezo electric valve 33 output pressure signal control relay valves 42.
In the present embodiment, utilizing first current pressure sensor 31 of piezoeffect is the piezoelectric ceramics body.Described piezoelectric ceramics body is arranged on the mouth of brake valve 22, with 0～8kg/cm
2Air pressure be converted into 4～20mA in proportion little electric current to controller 32 outputs.Because characteristics such as the piezoelectric ceramics body have passive, highly sensitive and response frequency is fast, accuracy rate can reach 0.1%, is the sensing device of the comparatively ideal measurement dynamic air pressure of the present invention.Piezoelectric ceramics body volume is little, in light weight, reliability is high, also can be installed in other pressure-sensitive position.
Micro controller system intelligent controller 32 adopts MCU, is made up of incoming signal treatment circuit and output driving circuit.The incoming signal treatment circuit receives 4～20mA current signal of piezoelectric ceramics body output, and output driving circuit is according to instruction output voltage signal control piezo electric valve 33 actions of MCU.
Piezo electric valve 33 is to utilize the piezoceramic characteristic to produce a kind of intelligent valve of flow-controllable.The present embodiment preferred version adopts the proportion expression piezo electric valve, opens in proportion according to the voltage signal of controller 32 outputs to regulate the valves the air of output different pressures.The core of proportion expression piezo electric valve is a piezoelectric, utilize piezoeffect to realize the switching of valve, power switched only is 1mW, and switching cycle only is 2ms, have be quick on the draw, characteristics such as reliable in action, compact conformation, very be suitable as the driver train in the technical solution of the present invention.
Because the current signal speed of transmission between first current pressure sensor 31, controller 32 and the piezo electric valve 33 is very fast, time difference in short range ignores, so the action of relay valve 42 is constantly identical with the action of brake valve 22 basically constantly, so front and back wheel can realize synchronous braking.Experimental measurement is the result show, the car that wheel base is 13 meters, the trailing wheel braking maneuver that adopts technical solution of the present invention than the delay of front wheel brake action less than 0.01 second.
Be the delivery pressure of accuracy control piezo electric valve 33, and the braking pressure of forward and backward compressed air brake cylinder is consistent, the present invention also is provided with reactive circuit.Described reactive circuit comprises respectively and controller 32 and piezo electric valve 33 mouth bonded assemblys second current pressure sensor 34.In the present embodiment, described second current pressure sensor 34 is the piezoelectric ceramics body, and this piezoelectric ceramics body is gathered the output pressure parameter of piezo electric valve 33, and the little current feedback that air pressure is converted to 4～20mA is given controller 32.Controller 32 with the outgoing current of the feedback current of second current pressure sensor 34 and first current pressure sensor 31 relatively after, eliminate error, output signal removes to control piezo electric valve 33 again, control by this closed loop circuit, the braking pressure of forward and backward compressed air brake cylinder is consistent, because the transmission of electric signal is not time-delay almost, make the present invention realize synchronous coordination braking truly.
Technical scheme of the present invention can be provided with multiple project organization according to actual needs.For example, for requiring the synchronous designing requirement fully of forward and backward brake unit, the present invention can adopt current control unit 3 to control forward and backward relay valve simultaneously, realizes absolute fully synchronous braking (being that front and back wheel braking nothing postpones).This technical scheme and structure flow process shown in Figure 1 are slightly different, but still do not break away from technical conceive of the present invention.
From the foregoing description as can be seen, technical solution of the present invention has made full use of the structure of existing Pneumatic braking system, do not need existing pipeline is carried out large-scale redevelopment, connecting current control unit 3 between forward and backward brake unit can finish, and has that cost is low, the obvious results characteristics.Obviously, current control unit 3 of the present invention both can have been born the synchro control of front and back wheel alone, again can with traditional Pneumatic braking system co-operation, realize the two redundant of Pneumatic braking system, improve the reliability of automobile brake perfrmance to greatest extent.
Obviously, the present invention also has more the functional character of in-depth and application prospect widely.For example, the present invention also can cooperate with the ABS anti-skid brake system that is provided with on the automobile and other safety system, the safety control of the wider meaning of realization.
The present invention can be widely used in the brake system of all kinds of big-and-middle-sized automobiles, train, Urban Light Rail Vehicle and use.
Be the explanation of the specific embodiment of the invention only below, in any form the present invention do not made restriction.Should be pointed out that for a person skilled in the art, can also make a lot of relevant distortion and improvement according to guiding theory of the present invention, but these all will fall into protection scope of the present invention.
Claims (10)
1. synchronous air brake system controlled by electric current, brake unit and back brake unit before comprising, it is characterized in that: also comprise and described before brake unit and back brake unit bonded assembly current control unit, described current control unit by be arranged at described before the current signal that obtains of first current pressure sensor on the brake unit air pressure bang path as the control signal of the described back of control brake unit.
2. synchronous air brake system controlled by electric current as claimed in claim 1 is characterized in that, described preceding brake unit comprises the preceding storage tank of bonded assembly, brake valve and preceding compressed air brake cylinder successively; Described back brake unit comprises successively storage tank behind the bonded assembly, relay valve and back compressed air brake cylinder; The current signal that described current control unit obtains by first current pressure sensor that is arranged at described brake valve mouth is as the control signal of control relay valve.
3. synchronous air brake system controlled by electric current as claimed in claim 1 or 2, it is characterized in that, described current control unit comprises the micro controller system intelligent controller, described controller receives the current signal of first current pressure sensor and exports control signal and give piezo electric valve, by piezo electric valve control relay valve.
4. synchronous air brake system controlled by electric current as claimed in claim 1 or 2 is characterized in that, described first current pressure sensor is the piezoelectric ceramics body.
5. synchronous air brake system controlled by electric current as claimed in claim 4 is characterized in that, described piezoelectric ceramics body is exported little electric current that the air pressure of 0～0.8MPa is converted into 4～20mA in proportion to controller.
6. synchronous air brake system controlled by electric current as claimed in claim 3 is characterized in that, described piezo electric valve is the proportion expression piezo electric valve.
7. synchronous air brake system controlled by electric current as claimed in claim 1 or 2 is characterized in that, the delay of described preceding brake unit and back brake unit synchronous braking is in 0.01 second.
8. synchronous air brake system controlled by electric current as claimed in claim 3, it is characterized in that, described current control unit also comprises a reactive circuit that the braking pressure of described forward and backward compressed air brake cylinder is consistent, and described reactive circuit connects the mouth of controller and piezo electric valve.
9. synchronous air brake system controlled by electric current as claimed in claim 8, it is characterized in that, described reactive circuit comprises that one gathers second current pressure sensor of piezo electric valve mouth air pressure, and described second current pressure sensor feeds back to controller with little current signal of 4～20mA.
10. synchronous air brake system controlled by electric current as claimed in claim 9 is characterized in that, described second current pressure sensor is the piezoelectric ceramics body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100119187A CN1314559C (en) | 2005-06-13 | 2005-06-13 | Synchronous air brake system controlled by electric current |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100119187A CN1314559C (en) | 2005-06-13 | 2005-06-13 | Synchronous air brake system controlled by electric current |
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| Publication Number | Publication Date |
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| CN1699098A true CN1699098A (en) | 2005-11-23 |
| CN1314559C CN1314559C (en) | 2007-05-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005100119187A Expired - Fee Related CN1314559C (en) | 2005-06-13 | 2005-06-13 | Synchronous air brake system controlled by electric current |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101992763A (en) * | 2010-11-18 | 2011-03-30 | 三一汽车起重机械有限公司 | Pneumatic braking system and method, and crane having pneumatic braking system |
| CN102424003A (en) * | 2011-10-21 | 2012-04-25 | 清华大学 | Parallel control system for recovering brake energy of electric bus and control method thereof |
| CN104875732A (en) * | 2015-05-28 | 2015-09-02 | 江苏大学 | Brake control system and method for semi-trailer train |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2628807B2 (en) * | 1991-07-30 | 1997-07-09 | 住友電気工業株式会社 | Anti-lock control device |
| US5207095A (en) * | 1991-10-11 | 1993-05-04 | Liberty Mutual Insurance Company | Vehicle braking technique evaluation apparatus |
| CN2631877Y (en) * | 2003-07-22 | 2004-08-11 | 万安集团有限公司 | Electronic controlled gas pressure braker of vehicle |
| CN2662018Y (en) * | 2003-12-11 | 2004-12-08 | 申功运 | High stability ceramic piezoelectric valve |
-
2005
- 2005-06-13 CN CNB2005100119187A patent/CN1314559C/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101992763A (en) * | 2010-11-18 | 2011-03-30 | 三一汽车起重机械有限公司 | Pneumatic braking system and method, and crane having pneumatic braking system |
| CN101992763B (en) * | 2010-11-18 | 2013-01-23 | 三一汽车起重机械有限公司 | Pneumatic braking system and method, and crane having pneumatic braking system |
| CN102424003A (en) * | 2011-10-21 | 2012-04-25 | 清华大学 | Parallel control system for recovering brake energy of electric bus and control method thereof |
| CN104875732A (en) * | 2015-05-28 | 2015-09-02 | 江苏大学 | Brake control system and method for semi-trailer train |
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| CN1314559C (en) | 2007-05-09 |
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Owner name: BEIJING TINGYI BRAKE CO., LTD. Free format text: FORMER OWNER: WANG TINGYI Effective date: 20100108 |
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Effective date of registration: 20100108 Address after: Building M2, No. 5, zone 3, Hing Valley Economic Development Zone, Pinggu, Beijing Patentee after: Beijing Tingyi Brake Co., Ltd. Address before: No. 5, unit 3, Paradise West District, Pinggu District, Beijing Patentee before: Wang Tingyi |
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Addressee: Beijing Tingyi Brake Co., Ltd. Document name: Notification to Pay the Fees |
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Granted publication date: 20070509 Termination date: 20140613 |
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