CN104875732A - Brake control system and method for semi-trailer train - Google Patents
Brake control system and method for semi-trailer train Download PDFInfo
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- CN104875732A CN104875732A CN201510281224.9A CN201510281224A CN104875732A CN 104875732 A CN104875732 A CN 104875732A CN 201510281224 A CN201510281224 A CN 201510281224A CN 104875732 A CN104875732 A CN 104875732A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
- B60T8/17—Using electrical or electronic regulation means to control braking
- B60T8/1701—Braking or traction control means specially adapted for particular types of vehicles
- B60T8/1708—Braking or traction control means specially adapted for particular types of vehicles for lorries or tractor-trailer combinations
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- Hydraulic Control Valves For Brake Systems (AREA)
Abstract
The invention relates to the field of a semi-trailer train, in particular to a brake control system and method for the semi-trailer train. The brake control system for the semi-trailer train comprises an air braking system, a controller ECU (Electronic Control Unit) and a vehicle condition monitoring system; the air braking system comprises an energy supply module, a tractor braking module and a trailer braking module; the energy supply module comprises an air compressor, a standby air source, a pressure regulating valve and a three-loop protection valve; the tractor braking module comprises a tractor front-axis gas storage barrel, a tractor rear-axis air storage barrel; a brake proportional valve, a first two-position two-way electromagnetic valve, a tractor front-axis brake air chamber, a tractor rear-axis brake air chamber, a first air pressure sensor and a second air pressure sensor; the trailer braking module comprises a trailer air storage barrel, a second two-position two-way electromagnetic valve, an electrical control proportional valve, a trailer brake air chamber and a third air pressure sensor. According to the system, a braking pressure on a tractor and a trailer is regulated in real time; meanwhile, the problem of delay of trailer braking is solved; brake safety of the semi-trailer train is improved.
Description
Technical field
The present invention relates to semi-trailer train field, particularly relate to a kind of semi-trailer train braking control system and method.
Background technology
Semi-trailer train can realize the function of " section transport " and " Drop and pull transport " because of it, becomes the important means improving conveying efficiency, more and more comes into one's own.But brake safe is the major hidden danger of train-type vehicle always.
Because semi-trailer train uses compression air brake, current semi-trailer train brake system comprises brake activation valve, wherein send signal to air receiver during brake activation valve braking, inflate to compressed air brake cylinder, this effect tractor truck and superimposed trailer carry out simultaneously, but because the brake piping of superimposed trailer is longer, comparatively tractor truck effect is longer for delay time to make the braking of superimposed trailer, make the braking of superimposed trailer comparatively tractor truck effect delay time longer (0.3-0.9s), tractor truck comparatively superimposed trailer is first braked, then semi-trailer train coupling hitch is stressed, likely can there is the dangerous working condition of " folding ", the insensitivity of semi-trailer train and safety can not get ensureing.
During emergency braking, because rate of braking is larger, brake comparatively tractor truck braking due to superimposed trailer and have delay, because the general loading mass of semi-trailer train is larger, larger impact can be produced to coupling hitch during braking, if superimposed trailer brake latency can be made up, make superimposed trailer first obtain corresponding lock torque, thus make semi-trailer train remain " stretching " state, be conducive to traffic safety.
Current semi-trailer train brake system comprises brake activation valve, wherein send signal to air receiver during brake activation valve braking, inflate to compressed air brake cylinder, this effect tractor truck and superimposed trailer carry out simultaneously, but because the brake piping of superimposed trailer is longer, comparatively tractor truck effect is longer for delay time to make the braking of superimposed trailer
The method of current solution superimposed trailer brake latency installs complemental brake system additional on semitrailer axle, publication number is that CN 2839026 proposes a kind of trailer complemental brake system, although can by control retarder make superimposed trailer comparatively tractor truck first brake, but complicated structure, and change the original brakig force distribution of semi-trailer train, the lock torque provided is little, and semi-trailer train cannot be made to remain " stretching " state.
Summary of the invention
In order to overcome above-mentioned the deficiencies in the prior art, the invention provides a kind of semi-trailer train braking control system and method.The brake-pressure of tractor truck and superimposed trailer is regulated in real time, solves the problem of superimposed trailer brake latency simultaneously, improve the braking safety of semi-trailer train.
A kind of semi-trailer train braking control system provided by the invention, comprises Pneumatic braking system, controller ECU, vehicle condition monitoring system; Pneumatic braking system comprises power module, tractor truck brake module, trailer braking protection valve module; Power module comprises air compressor, bailout gas, pressure regulating valve, three loop protection valves; Tractor truck brake module comprises tractor truck front axle air receiver, tractor truck rear axle air receiver, brake power proportioning system, the first 2/2-way electromagnetic valve, tractor truck front axle brake air chamber, tractor truck rear axle compressed air brake cylinder, the first baroceptor, the second baroceptor; Trailer braking protection valve module comprises trailer air receiver, the second 2/2-way electromagnetic valve, electronically controlled proportional valve, trailer braking protection valve air chamber; 3rd baroceptor.
Described air compressor is connected with pressure regulating valve, and described pressure regulating valve is connected with bailout gas, and described three loop protection valves are connected with described pressure regulating valve, described three loop protection valves is connected with described first 2/2-way electromagnetic valve, the second 2/2-way electromagnetic valve; Described first 2/2-way electromagnetic valve is connected with tractor truck front axle air receiver, tractor truck rear axle air receiver, described tractor truck front axle air receiver, tractor truck rear axle air receiver are connected with brake power proportioning system, described brake power proportioning system are connected with tractor truck front axle brake air chamber and tractor truck rear axle compressed air brake cylinder; Described second 2/2-way electromagnetic valve is connected with trailer air receiver, described trailer air receiver is connected with electronically controlled proportional valve, described electronically controlled proportional valve is connected with trailer braking protection valve air chamber.
In such scheme, the first baroceptor is connected with between described tractor truck front axle brake air chamber and described controller ECU, be connected with the second baroceptor between tractor truck rear axle compressed air brake cylinder and described controller ECU, between described superimposed trailer compressed air brake cylinder and described controller ECU, be connected with the 3rd baroceptor.
In such scheme, described first 2/2-way electromagnetic valve, the second 2/2-way electromagnetic valve are all connected with described controller ECU.
In such scheme, described brake power proportioning system, electronically controlled proportional valve are all connected with described controller ECU.
In such scheme, described vehicle condition monitoring system comprises car speed sensor, brake pedal displacement pickup, brake pedal acceleration pick-up and load transducer; The pedal displacement signal of brake pedal displacement pickup monitor vehicle, brake pedal acceleration pick-up monitoring pedal acceleration signal, the speed signal of car speed sensor monitor vehicle, send controller ECU to, described controller ECU produces control signal and acts on the first 2/2-way electromagnetic valve, the second 2/2-way electromagnetic valve, brake power proportioning system and electronically controlled proportional valve.
The present invention also provided a kind of semi-trailer train brake control method, comprised the steps:
Step one: chaufeur steps on brake pedal;
Step 2: brake pedal displacement pickup gathers pedal displacement signal, brake pedal acceleration pick-up gathers pedal acceleration signal;
Step 3: controller ECU analyzes pedal displacement signal and pedal acceleration signal, judges the braking intention of chaufeur;
a., when brake pedal displacement is less than 40mm, when brake pedal acceleration/accel is lower than 200mm/s, judge that chaufeur braking intention is light brake; Controller ECU controls the second 2/2-way electromagnetic valve and opens; Pressurized air in trailer air receiver is via the compressed air brake cylinder of the second 2/2-way electromagnetic valve to superimposed trailer, and now, semi-trailer train only has superimposed trailer to brake, and tractor truck is not braked;
B. be less than 80mm when brake pedal displacement is greater than 40mm, when brake pedal acceleration/accel is between 200-400mm/s, judge that chaufeur braking intention is moderate braking; Controller ECU controls the second 2/2-way electromagnetic valve and opens rear 0.5s first 2/2-way electromagnetic valve unlatching, the load signal of the semi-trailer train that controller ECU gathers according to vehicle condition monitoring system, the lock torque of rational distribution tractor truck, superimposed trailer, controller ECU controls the opening time of the first 2/2-way electromagnetic valve, the second 2/2-way electromagnetic valve respectively, effectively compensate for the problem of current gas pressure brake system superimposed trailer brake latency;
C. when brake pedal displacement is greater than 80mm, brake pedal acceleration/accel, higher than 400mm/s, judges that the braking intention of chaufeur is emergency braking; This Time Controller ECU controls the second 2/2-way electromagnetic valve and opens rapidly, after 0.2s, the first 2/2-way electromagnetic valve is opened, controller ECU controls the aperture of electronically controlled proportional valve, increase the braking force of superimposed trailer, the tractor truck that controller ECU gathers according to vehicle condition monitoring system and superimposed trailer vehicle speed signal, wheel speed signal, calculate slip rate, if superimposed trailer is by locking, then control the aperture of electronically controlled proportional valve, reduce superimposed trailer braking force;
Step 4: chaufeur loosen the brake;
If light brake, controller ECU controls the second 2/2-way electromagnetic valve power-off and closes, and cuts off the connection between superimposed trailer air receiver and superimposed trailer compressed air brake cylinder, stops braking;
If moderate, emergency braking, controller ECU controls the first power-off of the first 2/2-way electromagnetic valve and closes, then closes the second 2/2-way electromagnetic valve.
Beneficial effect of the present invention: the opening and closing being controlled tractor truck and superimposed trailer brake piping by the first 2/2-way electromagnetic valve, the second 2/2-way electromagnetic valve respectively, superimposed trailer can be realized " brake in advance ", compensate for due to compression air brake pipeline brake latency, the dangerous working condition such as effectively prevent that train from " folding ", improve braking safety, improve the insensitivity of semi-trailer train.Simultaneously, the real-time status of vehicle condition monitoring system monitor vehicle, the braking intention of chaufeur can be judged, thus according to the opening time that the braking intention ECU of chaufeur controls the first 2/2-way electromagnetic valve, the second 2/2-way electromagnetic valve respectively, ensure that insensitivity and the safety of semi-trailer train in braking procedure; The slip rate of tractor truck and superimposed trailer when simultaneously ECU can calculate braking in real time, real-time control presssure regulating control, brake power proportioning system and electronically controlled proportional valve, regulate the brake-pressure of tractor truck and superimposed trailer in real time, ensures locking not to occur in car brakeing process.When first 2/2-way electromagnetic valve, the second 2/2-way electromagnetic valve are automatically controlled, response is fast, and precision is high; During brake off, first remove tractor truck braking, then remove trailer braking protection valve, improve braking safety further.
Accompanying drawing explanation
Fig. 1 is superimposed trailer train-type vehicle braking force controller schematic diagram.(in figure, solid line is pneumatic circuit, and dotted line is electric signal route)
Braking force controller schematic diagram when Fig. 2 is semi-trailer train light brake.(in figure, solid line is pneumatic circuit, and dotted line is electric signal route)
Braking force controller schematic diagram when Fig. 3 is semi-trailer train moderate, emergency braking.(in figure, solid line is pneumatic circuit, and dotted line is electric signal route)
Fig. 4 is the control policy diagram of circuit of brake system.
In figure: 1. air compressor, 2. auxiliary source of the gas, 3. pressure regulating valve, 4. three loop distributing valves, 5. the first 2/2-way electromagnetic valve, 6. tractor truck front axle brake air chamber, 7. the first baroceptor, 8. the second baroceptor 9. the 3rd baroceptor, 10. brake power proportioning system, 11. tractor truck front axle air receivers, 12. tractor truck rear axle air receivers, 13. tractor truck rear axle compressed air brake cylinders, 14. second 2/2-way electromagnetic valves, 15. superimposed trailer air receivers, 16. electronically controlled proportional valves, 17. controller ECU, 18. superimposed trailer compressed air brake cylinders.
Detailed description of the invention
Below in conjunction with the drawings and the specific embodiments, the present invention is further described, but protection scope of the present invention is not limited thereto.
As shown in Figure 1, a kind of semi-trailer train braking force controller, comprises Pneumatic braking system, controller ECU17, vehicle condition monitoring system; Pneumatic braking system comprises power module, tractor truck brake module, trailer braking protection valve module; Power module comprises air compressor 1, bailout gas 2, pressure regulating valve 3, three loop protection valves 4; Tractor truck brake module comprises tractor truck front axle air receiver 11, tractor truck rear axle air receiver 12, brake power proportioning system 10, first 2/2-way electromagnetic valve 5, tractor truck front axle brake air chamber 6, tractor truck rear axle compressed air brake cylinder 13, first baroceptor 7, second baroceptor 8; Trailer braking protection valve module comprises trailer air receiver 15, second 2/2-way electromagnetic valve 14, electronically controlled proportional valve 16, trailer braking protection valve air chamber the 18, three baroceptor 9; Described air compressor 1 is connected with pressure regulating valve 3, described pressure regulating valve 3 is connected with bailout gas 2, described three loop protection valves 4 are connected with described pressure regulating valve 3, described three loop protection valves 4 are connected with described first 2/2-way electromagnetic valve 5, second 2/2-way electromagnetic valve 14; Described first 2/2-way electromagnetic valve 5 is connected with tractor truck front axle air receiver 11, tractor truck rear axle air receiver 12, described tractor truck front axle air receiver 11, tractor truck rear axle air receiver 12 are connected with brake power proportioning system 10, described brake power proportioning system 10 are connected with tractor truck front axle brake air chamber 6 and tractor truck rear axle compressed air brake cylinder 13; Described second 2/2-way electromagnetic valve 14 is connected with trailer air receiver 15, described trailer air receiver 15 is connected with electronically controlled proportional valve 16, described electronically controlled proportional valve 16 is connected with trailer braking protection valve air chamber 18.
Described vehicle condition monitoring system comprises car speed sensor, brake pedal displacement pickup, brake pedal acceleration pick-up and load transducer; The pedal displacement signal of brake pedal displacement pickup monitor vehicle, brake pedal acceleration pick-up monitoring pedal acceleration signal, the speed signal of car speed sensor monitor vehicle, send controller ECU17 to, described controller ECU17 produces control signal and acts on the first 2/2-way electromagnetic valve 5, second 2/2-way electromagnetic valve 14, brake power proportioning system 10 and electronically controlled proportional valve 16.
The first baroceptor 7 is connected with between described tractor truck front axle brake air chamber 6 and described controller ECU17, be connected with the second baroceptor 8 between tractor truck rear axle compressed air brake cylinder 13 and described controller ECU17, between described superimposed trailer compressed air brake cylinder 18 and described controller ECU17, be connected with the 3rd baroceptor 9.
Described first 2/2-way electromagnetic valve 5, second 2/2-way electromagnetic valve 14 is all connected with described controller ECU17.
Described brake power proportioning system 10, electronically controlled proportional valve 16 are all connected with described controller ECU17.
Now the first 2/2-way electromagnetic valve 5 and the second 2/2-way electromagnetic valve 14 are all disconnect, and now semi-trailer train is not braked.
As shown in Figure 2, braking force controller schematic diagram during a kind of semi-trailer train light brake, concrete steps are as follows:
Step one: chaufeur steps on brake pedal;
Step 2: brake pedal displacement pickup gathers pedal displacement signal, brake pedal acceleration pick-up gathers pedal acceleration signal;
Step 3: controller ECU analyzes pedal displacement signal and pedal acceleration signal, if brake pedal displacement is less than 40mm, when brake pedal acceleration/accel is lower than 200mm/s, judges that chaufeur braking intention is light brake;
Controller ECU17 controls the second 2/2-way electromagnetic valve 14 and opens; Pressurized air in trailer air receiver 15 is via the compressed air brake cylinder 18 of the second 2/2-way electromagnetic valve 14 to superimposed trailer; Now, semi-trailer train only has superimposed trailer to brake, and tractor truck is not braked;
By pulling force, the dangerous working condition of " folding " can not be there is, ensure that insensitivity and the safety of semi-trailer train in the coupling hitch of semi-trailer train.
Step 4: chaufeur loosen the brake, controller ECU17 controls the second 2/2-way electromagnetic valve 14 power-off and closes, and cuts off the connection between superimposed trailer air receiver 15 and superimposed trailer compressed air brake cylinder 18, stops braking, ensure that the safety of semi-trailer train.
As shown in Figure 3, braking force controller schematic diagram when a kind of semi-trailer train moderate, emergency braking, concrete steps are as follows:
Step one: chaufeur steps on brake pedal;
Step 2: brake pedal displacement pickup gathers pedal displacement signal, brake pedal acceleration pick-up gathers pedal acceleration signal;
Step 3: controller ECU analyzes pedal displacement signal and pedal acceleration signal, judges the braking intention of chaufeur;
Be less than 80mm when brake pedal displacement is greater than 40mm, when brake pedal acceleration/accel is between 200-400mm/s, judge that chaufeur braking intention is moderate braking; Controller ECU17 controls the second 2/2-way electromagnetic valve 14 and opens rear 0.5s first 2/2-way electromagnetic valve 5 and open, the load signal of the semi-trailer train that controller ECU17 gathers according to vehicle condition monitoring system, the lock torque of rational distribution tractor truck, superimposed trailer, controller ECU17 controls the opening time of the first 2/2-way electromagnetic valve 5, second 2/2-way electromagnetic valve 14 respectively.
Now, semi-trailer train tractor truck and superimposed trailer are all braked, and compensate for the braking of Conventional braking systems superimposed trailer compared with the shortcoming of tractor truck brake latency, make semi-trailer train coupling hitch be in " stretching " state, improve the insensitivity of train-type vehicle, improve braking safety.
When brake pedal displacement is greater than 80mm, brake pedal acceleration/accel, higher than 400mm/s, judges that the braking intention of chaufeur is emergency braking; This Time Controller ECU17 controls the second 2/2-way electromagnetic valve 14 and opens rapidly, after 0.2s, the first 2/2-way electromagnetic valve 5 is opened, controller ECU17 controls the aperture of electronically controlled proportional valve 16, increase the braking force of superimposed trailer, the tractor truck that controller ECU17 gathers according to vehicle condition monitoring system and superimposed trailer vehicle speed signal, wheel speed signal, calculate slip rate, if superimposed trailer is by locking, then control the aperture of electronically controlled proportional valve 16, reduce superimposed trailer braking force; Tractor truck rate of braking is less than or equal to superimposed trailer rate of braking, meets the requirement of semi-trailer train insensitivity.
If the locking of tractor truck front axle brake, then controller ECU17 control brake power proportioning system 10 reduces tractor truck front axle brake pressure.
If tractor truck rear axle is seized, then controller ECU17 control brake power proportioning system 10 reduces tractor truck rear axle brake-pressure.
If semitrailer axle is seized, then controller ECU17 control electronically controlled proportional valve 16 reduces semitrailer axle brake-pressure.
Tractor truck rate of braking is greater than superimposed trailer rate of braking, and controller ECU17 controls the aperture of electronically controlled proportional valve 16, increases the braking force of superimposed trailer.
If superimposed trailer is by locking, then control the aperture of electronically controlled proportional valve 16, reduce superimposed trailer braking force.
Step 4: chaufeur loosen the brake; Controller ECU17 controls the first power-off of the first 2/2-way electromagnetic valve 5 and closes, then closes the second 2/2-way electromagnetic valve 14, ensure that the safety of semi-trailer train.
Chaufeur loosen the brake, controller ECU17 controls the first power-off closedown of the first 2/2-way electromagnetic valve 5, cut off the connection of tractor truck front axle air receiver 11 and tractor truck front axle brake air chamber 6, cut off connection between tractor truck rear axle air receiver 12 and tractor truck rear axle compressed air brake cylinder 13, the pressurized air of tractor truck front axle brake air chamber 6 and tractor truck rear axle compressed air brake cylinder 13 enters in air through the exhausr port of brake power proportioning system 10, removes tractor truck braking.
ECU controls the second 2/2-way electromagnetic valve 14 power-off and closes, cut off the connection between superimposed trailer car air receiver 15 and superimposed trailer car car compressed air brake cylinder 18, the pressurized air of superimposed trailer car compressed air brake cylinder 18 enters in air through the exhausr port of electronically controlled proportional valve 16, removes the braking of superimposed trailer car.
Described embodiment is the preferred embodiment of the present invention; but the present invention is not limited to above-mentioned embodiment; when not deviating from flesh and blood of the present invention, any apparent improvement that those skilled in the art can make, replacement or modification all belong to protection scope of the present invention.
Claims (6)
1. a semi-trailer train braking control system, is characterized in that: comprise Pneumatic braking system, controller ECU(17), vehicle condition monitoring system;
Pneumatic braking system comprises power module, tractor truck brake module, trailer braking protection valve module;
Power module comprises air compressor (1), bailout gas (2), pressure regulating valve (3), three loop protection valves (4);
Tractor truck brake module comprises tractor truck front axle air receiver (11), tractor truck rear axle air receiver (12), brake power proportioning system (10), first 2/2-way electromagnetic valve (5), tractor truck front axle brake air chamber (6), tractor truck rear axle compressed air brake cylinder (13), the first baroceptor (7), the second baroceptor (8);
Trailer braking protection valve module comprises trailer air receiver (15), the second 2/2-way electromagnetic valve (14), electronically controlled proportional valve (16), trailer braking protection valve air chamber (18), the 3rd baroceptor (9);
Described air compressor (1) is connected with pressure regulating valve (3), described pressure regulating valve (3) is connected with bailout gas (2), described three loop protection valves (4) are connected with described pressure regulating valve (3), described three loop protection valves (4) are connected with described first 2/2-way electromagnetic valve (5), the second 2/2-way electromagnetic valve (14);
Described first 2/2-way electromagnetic valve (5) is connected with tractor truck front axle air receiver (11), tractor truck rear axle air receiver (12), described tractor truck front axle air receiver (11), tractor truck rear axle air receiver (12) are connected with brake power proportioning system (10), described brake power proportioning system (10) are connected with tractor truck front axle brake air chamber (6) and tractor truck rear axle compressed air brake cylinder (13);
Described second 2/2-way electromagnetic valve (14) is connected with trailer air receiver (15), described trailer air receiver (15) is connected with electronically controlled proportional valve (16), described electronically controlled proportional valve (16) is connected with trailer braking protection valve air chamber (18).
2. a kind of semi-trailer train braking control system according to claim 1, it is characterized in that: described tractor truck front axle brake air chamber (6) and described controller ECU(17) between be connected with the first baroceptor (7), tractor truck rear axle compressed air brake cylinder (13) and described controller ECU(17) between be connected with the second baroceptor (8), described superimposed trailer compressed air brake cylinder (18) and described controller ECU(17) between be connected with the 3rd baroceptor (9).
3. a kind of semi-trailer train braking control system according to claim 1, is characterized in that: described first 2/2-way electromagnetic valve (5), the second 2/2-way electromagnetic valve (14) all with described controller ECU(17) be connected.
4. a kind of semi-trailer train braking control system according to claim 1, is characterized in that: described brake power proportioning system (10), electronically controlled proportional valve (16) all with described controller ECU(17) be connected.
5. a kind of semi-trailer train braking control system according to claim 1, is characterized in that: described vehicle condition monitoring system comprises car speed sensor, brake pedal displacement pickup, brake pedal acceleration pick-up and load transducer; The pedal displacement signal of brake pedal displacement pickup monitor vehicle, brake pedal acceleration pick-up monitoring pedal acceleration signal, the speed signal of car speed sensor monitor vehicle, send controller ECU(17 to), described controller ECU(17) produce control signal and act on the first 2/2-way electromagnetic valve (5), the second 2/2-way electromagnetic valve (14), brake power proportioning system (10) and electronically controlled proportional valve (16).
6. a semi-trailer train brake control method, is characterized in that: comprise the steps:
Step one: chaufeur steps on brake pedal;
Step 2: brake pedal displacement pickup gathers pedal displacement signal; Brake pedal acceleration pick-up gathers pedal acceleration signal;
Step 3: controller ECU analyzes pedal displacement signal and pedal acceleration signal, judges the braking intention of chaufeur;
a., when brake pedal displacement is less than 40mm, when brake pedal acceleration/accel is lower than 200mm/s, judge that chaufeur braking intention is light brake; Controller ECU(17) control the second 2/2-way electromagnetic valve (14) unlatching; Pressurized air in trailer air receiver (15) is via the compressed air brake cylinder (18) of the second 2/2-way electromagnetic valve (14) to superimposed trailer, and now, semi-trailer train only has superimposed trailer to brake, and tractor truck is not braked;
B. be less than 80mm when brake pedal displacement is greater than 40mm, when brake pedal acceleration/accel is between 200-400mm/s, judge that chaufeur braking intention is moderate braking; Controller ECU(17) control rear 0.5s first 2/2-way electromagnetic valve (5) unlatching of the second 2/2-way electromagnetic valve (14) unlatching, controller ECU(17) load signal of semi-trailer train that gathers according to vehicle condition monitoring system, the lock torque of rational distribution tractor truck, superimposed trailer, controller ECU(17) control respectively opening time of the first 2/2-way electromagnetic valve (5), the second 2/2-way electromagnetic valve (14), effectively to compensate for the problem of current gas pressure brake system superimposed trailer brake latency;
C. when brake pedal displacement is greater than 80mm, brake pedal acceleration/accel, higher than 400mm/s, judges that the braking intention of chaufeur is emergency braking; This Time Controller ECU(17) control the second 2/2-way electromagnetic valve (14) and open rapidly, after 0.2s, the first 2/2-way electromagnetic valve (5) is opened, controller ECU(17) control the aperture of electronically controlled proportional valve (16), increase the braking force of superimposed trailer, controller ECU(17) according to vehicle condition monitoring system gather tractor truck and superimposed trailer vehicle speed signal, wheel speed signal, calculate slip rate, if superimposed trailer is by locking, then control the aperture of electronically controlled proportional valve (16), reduce superimposed trailer braking force;
Step 4: chaufeur loosen the brake;
If light brake, controller ECU(17) control the second 2/2-way electromagnetic valve 14 power-off closedown, cut off the connection between superimposed trailer air receiver (15) and superimposed trailer compressed air brake cylinder (18), stop braking;
If moderate, emergency braking, controller ECU(17) control the first power-off closedown of the first 2/2-way electromagnetic valve (5), then close the second 2/2-way electromagnetic valve (14).
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| CN201510281224.9A CN104875732A (en) | 2015-05-28 | 2015-05-28 | Brake control system and method for semi-trailer train |
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| CN201510281224.9A CN104875732A (en) | 2015-05-28 | 2015-05-28 | Brake control system and method for semi-trailer train |
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| CN105196999A (en) * | 2015-09-29 | 2015-12-30 | 东风商用车有限公司 | Automatically controlled automatic braking system of trailer |
| CN107953872A (en) * | 2017-11-20 | 2018-04-24 | 江苏大学 | A kind of caravan trailer for considering electormagnetic braking sytem lag characteristic synchronously follows brake control method |
| CN108437959A (en) * | 2018-05-28 | 2018-08-24 | 徐工集团工程机械股份有限公司科技分公司 | A kind of high-speed loading machine emergency braking system and method with trailer |
| CN108639033A (en) * | 2018-05-28 | 2018-10-12 | 徐工集团工程机械股份有限公司科技分公司 | A kind of loading machine hand braking system and method with trailer |
| CN109071035A (en) * | 2016-03-18 | 2018-12-21 | 戈尔德霍弗股份公司 | tractor |
| CN109733359A (en) * | 2019-01-18 | 2019-05-10 | 江苏大学 | A kind of pneumatic brake emergency braking auxiliary device and method |
| CN110371129A (en) * | 2019-06-28 | 2019-10-25 | 湖南行必达网联科技有限公司 | Main vehicle and trailer braking protection valve consistency judgment method, device and braking system |
| CN111591269A (en) * | 2020-06-11 | 2020-08-28 | 西安正昌电子股份有限公司 | Integrated electric control valve for trailer control |
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| CN113119933A (en) * | 2021-04-06 | 2021-07-16 | 广州瑞立科密汽车电子股份有限公司 | Trailer line control unit and brake system |
| CN113479182A (en) * | 2021-07-19 | 2021-10-08 | 武汉理工大学 | Method and system for monitoring pressure change rate of brake chamber of dangerous goods semi-trailer transport vehicle |
| CN113548025A (en) * | 2021-08-10 | 2021-10-26 | 安徽理工大学 | Gas-electricity coupling type cooperative braking system of trailer |
| CN113581302A (en) * | 2021-08-31 | 2021-11-02 | 南京林业大学 | Automatic adjusting system and method for position of semi-trailer train traction seat |
| CN114162100A (en) * | 2021-11-09 | 2022-03-11 | 中车长江运输设备集团有限公司 | Vehicle marshalling brake control method and vehicle marshalling |
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| CN109733359A (en) * | 2019-01-18 | 2019-05-10 | 江苏大学 | A kind of pneumatic brake emergency braking auxiliary device and method |
| CN110371129A (en) * | 2019-06-28 | 2019-10-25 | 湖南行必达网联科技有限公司 | Main vehicle and trailer braking protection valve consistency judgment method, device and braking system |
| CN111591269A (en) * | 2020-06-11 | 2020-08-28 | 西安正昌电子股份有限公司 | Integrated electric control valve for trailer control |
| CN112026731A (en) * | 2020-08-12 | 2020-12-04 | 安徽江淮银联重型工程机械有限公司 | Full-vehicle braking system of electric tractor |
| CN112026731B (en) * | 2020-08-12 | 2023-09-29 | 安徽江淮重型工程机械有限公司 | Full-vehicle braking system of electric tractor |
| CN113119933A (en) * | 2021-04-06 | 2021-07-16 | 广州瑞立科密汽车电子股份有限公司 | Trailer line control unit and brake system |
| CN113479182A (en) * | 2021-07-19 | 2021-10-08 | 武汉理工大学 | Method and system for monitoring pressure change rate of brake chamber of dangerous goods semi-trailer transport vehicle |
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| CN113548025A (en) * | 2021-08-10 | 2021-10-26 | 安徽理工大学 | Gas-electricity coupling type cooperative braking system of trailer |
| CN113581302A (en) * | 2021-08-31 | 2021-11-02 | 南京林业大学 | Automatic adjusting system and method for position of semi-trailer train traction seat |
| CN114162100A (en) * | 2021-11-09 | 2022-03-11 | 中车长江运输设备集团有限公司 | Vehicle marshalling brake control method and vehicle marshalling |
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