CN112572387B - Brake control system of vehicle, vehicle and brake control method - Google Patents
Brake control system of vehicle, vehicle and brake control method Download PDFInfo
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- CN112572387B CN112572387B CN202011434988.4A CN202011434988A CN112572387B CN 112572387 B CN112572387 B CN 112572387B CN 202011434988 A CN202011434988 A CN 202011434988A CN 112572387 B CN112572387 B CN 112572387B
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- brake
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- brake controller
- signal
- air pressure
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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
- B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
- B60T13/10—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release
- B60T13/66—Electrical control in fluid-pressure brake systems
- B60T13/662—Electrical control in fluid-pressure brake systems characterised by specified functions of the control system components
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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
- B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
- B60T13/10—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release
- B60T13/66—Electrical control in fluid-pressure brake systems
- B60T13/68—Electrical control in fluid-pressure brake systems by electrically-controlled valves
- B60T13/683—Electrical control in fluid-pressure brake systems by electrically-controlled valves in pneumatic systems or parts thereof
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- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Braking Systems And Boosters (AREA)
- Regulating Braking Force (AREA)
Abstract
The invention provides a brake control system of a vehicle, the vehicle and a brake control method, and belongs to the field of vehicle control. The brake control system includes: each air pressure control module is connected with the wheel side brake air chambers at the two ends of each axle through an air passage; the first electric control foot valve is used for generating a first brake signal during forward driving when being triggered; the second electric control foot valve is used for generating a second brake signal during reverse driving when being triggered; the first brake controller, the first electric control foot valve and part of the plurality of pneumatic control modules are in signal connection, and the second brake controller, the second electric control foot valve and the rest plurality of pneumatic control modules are in signal connection. The brake control system, the vehicle and the brake control method can meet the requirement of brake response harmony.
Description
Technical Field
The invention belongs to the field of vehicle control, and particularly relates to a brake control system of a vehicle, the vehicle and a brake control method.
Background
The design of multi-compartment multi-shaft large-capacity urban passenger car structure to a brake system is most challenging because the brake response coordination needs to meet the requirements of design and whole car use, and the requirements are as follows: because the hinged disk is limited by the tension and compression characteristics, the brake response coordination needs to meet the requirement that the later axle brake response is more preferred.
The existing multi-carriage multi-shaft large-capacity urban passenger car generally has a one-way running structure with 3 carriages and 4 axles. A few foreign brands and domestic brake suppliers in the industry master the brake response coordination control method. The requirement of brake response harmony is realized mainly through the design of a control strategy of the electronic brake control system, and only one-way driving can be met. Compared with a vehicle with 3 sections of carriages and 4 axles running in one direction, the vehicle with 3 sections of carriages and 6 axles running in two directions has the advantages that the length of the whole vehicle exceeds 30 meters, the vehicle is in ultra-large-capacity layout, the riding is comfortable, and the passenger capacity of a single passenger car can reach 310 people; fixed stations, fixed lines and special road rights ensure the punctuality and rapidity of operation; the rail does not need to be laid, the ground mark lines are marked on the existing road, the ground mark line information is collected through equipment such as cameras installed on the vehicle, and the problem of difficulty in turning around the long vehicle body can be solved due to the fact that a double-vehicle-head cab is arranged.
However, the existing brake suppliers of the vehicle structure do not correspond to the electronic brake control strategy type spectrum, and how to achieve brake response coordination control is a big problem. The existing electric control pneumatic braking system structure and the control method can not be applied to a large-capacity city passenger car with 3 carriages and 6 axles running in two directions.
Disclosure of Invention
It is an object of a first aspect of the present invention to provide a brake control system for a vehicle that meets the infrastructure framework of brake response coordination requirements.
A further object of the present invention is to completely solve the problem that the existing electronic control pneumatic brake system cannot realize the bidirectional driving function of the vehicle.
It is an object of a second aspect of the invention to provide a vehicle comprising a brake control system as described above.
It is an object of the third aspect of the invention to provide a brake control method for controlling the above brake control system, which can ensure that the more rear axle brake response is accorded priority regardless of the direction from which the vehicle is driven.
In particular, the present invention provides a brake control system of a vehicle that is drivable in two directions and includes a plurality of axles and a plurality of cars, the brake control system comprising:
each air pressure control module is connected with the wheel side brake air chambers at the two ends of each axle through an air passage;
the first electric control foot valve is used for generating a first brake signal during forward driving when being triggered;
the second electric control foot valve is used for generating a second brake signal during reverse driving when being triggered;
the first brake controller, the first electric control foot valve and part of the plurality of pneumatic control modules are in signal connection, and the second brake controller, the second electric control foot valve and the rest plurality of pneumatic control modules are in signal connection.
Optionally, the vehicle comprises 6 axles and 3 cars.
Optionally, the total number of the pneumatic control modules is an even number, and the first brake controller, the first electrically controlled foot valve and half of the plurality of pneumatic control modules are in signal connection.
In particular, the invention also provides a vehicle which can run along two directions and comprises a plurality of axles and a plurality of carriages, and the vehicle comprises the brake control system of any one of the above-mentioned aspects.
In particular, the present invention also provides a brake control method of a vehicle for controlling the vehicle described above, the brake control method including:
when the first electric control foot valve generates the first brake signal or the second electric control foot valve generates the second brake signal, the plurality of air pressure control modules are controlled to be sequentially started along the reverse direction of the running direction of the vehicle so as to brake the vehicle.
Optionally, the step of controlling the sequential activation of the plurality of air pressure control modules in the reverse direction of the driving direction of the vehicle includes:
and controlling the plurality of air pressure control modules to be sequentially started at preset time intervals along the reverse direction of the running direction of the vehicle, and gradually reducing the brake air pressure of the plurality of air pressure control modules according to the brake response target air pressure difference value.
Optionally, when the first electronic foot valve generates the first brake signal or the second electronic foot valve generates the second brake signal, the step of controlling the plurality of air pressure control modules to be sequentially activated in a direction opposite to a driving direction of the vehicle includes:
when the first electronic foot valve generates the first brake signal, sending the first brake control signal to the first brake controller;
the first brake controller sending the first control signal to the second brake controller;
the second brake controller controls each air pressure control module connected with the second brake controller to be sequentially started along the reverse direction of the running direction of the vehicle;
after the pneumatic control modules connected with the second brake controller are all started, the first brake controller controls the pneumatic control modules connected with the first brake controller to be started in sequence along the reverse direction of the running direction of the vehicle.
Optionally, when the first electronic foot valve generates the first brake signal or the second electronic foot valve generates the second brake signal, the step of controlling the plurality of air pressure control modules to be sequentially activated in a direction opposite to a driving direction of the vehicle includes:
when the second electric foot valve generates the second brake signal, sending the second brake control signal to the second brake controller;
the second brake controller sending the second control signal to the first brake controller;
the first brake controller controls each air pressure control module connected with the first brake controller to be sequentially started along the reverse direction of the running direction of the vehicle;
after the pneumatic control modules connected with the first brake controller are all started, the second brake controller controls the pneumatic control modules connected with the second brake controller to be started in sequence along the reverse direction of the running direction of the vehicle.
The invention redesigns the electric control air pressure braking system aiming at the large-capacity vehicle with multiple axles and multiple carriages running in two directions, abandons the existing air pressure control, and adopts an electronic control mode to carry out structural arrangement design on electronic devices of the whole vehicle braking system so as to construct a basic structural framework capable of meeting the requirement of braking response harmony. Signals of the air pressure control module, the first electric control foot valve and the second electric control foot valve are collected, processed and sent by using a whole vehicle CAN bus network, and a foundation is built for realizing a subsequent control method.
Furthermore, the invention can realize the braking of the vehicle during the bidirectional running, and thoroughly solves the problem that the existing electric control air pressure braking system can not realize the bidirectional running function of the vehicle.
Furthermore, a set of complete electric control air pressure brake response coordination control method is constructed, and the condition that the brake response of the axle in the rear part is more preferred no matter which direction the automobile runs from is ensured.
The above and other objects, advantages and features of the present invention will become more apparent to those skilled in the art from the following detailed description of specific embodiments thereof, taken in conjunction with the accompanying drawings.
Drawings
Some specific embodiments of the invention will be described in detail hereinafter, by way of illustration and not limitation, with reference to the accompanying drawings. The same reference numbers in the drawings identify the same or similar elements or components. Those skilled in the art will appreciate that the drawings are not necessarily drawn to scale. In the drawings:
FIG. 1 is a schematic exterior view of a vehicle according to one embodiment of the present invention;
fig. 2 is a structural frame diagram when the brake control system according to one embodiment of the invention is applied to a vehicle;
FIG. 3 is a signal connection block diagram of a brake control system according to one embodiment of the present invention;
FIG. 4 is a flow chart of a braking control method according to one embodiment of the present invention;
fig. 5 is a flowchart of a brake control method according to another embodiment of the present invention.
Detailed Description
Fig. 1 is a schematic external view of a vehicle according to an embodiment of the present invention. Fig. 2 is a structural frame diagram of a brake control system according to an embodiment of the present invention applied to a vehicle, in which solid lines indicate air paths, broken lines indicate signal connections, and arrows indicate traveling directions in fig. 2. FIG. 3 is a signal connection block diagram of a brake control system according to one embodiment of the present invention. The present invention provides a brake control system for a vehicle, as shown in fig. 1, which can run in both directions and includes a plurality of axles 101 and a plurality of cars 102. In one embodiment, as shown in FIG. 2, the brake control system includes a plurality of pneumatic control modules 10, a first electronically controlled foot valve 20, a second electronically controlled foot valve 30, a first brake controller 40, and a second brake controller 50. Each pneumatic control module 10 is connected with the wheel-side brake chambers at the two ends of each axle 101 through air channels. The first electronically controlled foot valve 20 is operable when activated to generate a first braking signal when traveling in the forward direction. The second electronically controlled foot valve 30 is operable when activated to generate a second braking signal for reverse travel. The first and second electronically controlled foot valves 20 and 30 may be disposed at both ends of the vehicle, respectively. The first brake controller 40 is in signal connection with the second brake controller 50, wherein the first brake controller 40, the first electrically controlled foot valve 20 and a part of the plurality of pneumatic control modules 10 are in signal connection, and the second brake controller 50, the second electrically controlled foot valve 30 and the rest of the plurality of pneumatic control modules 10 are in signal connection. The signal connection here may be a CAN connection.
In the embodiment, an electronic control air brake system is redesigned for a large-capacity vehicle with multiple axles 101 and multiple carriages 102 running in two directions, the existing air control is abandoned, and the structural arrangement design is carried out on electronic devices of the whole vehicle brake system in an electronic control mode so as to construct a basic structural framework capable of meeting the requirement of brake response harmony. Signals of the air pressure control module 10, the first electric control foot valve 20 and the second electric control foot valve 30 are collected, processed and sent by using a whole vehicle CAN bus network, and a foundation is established for realizing a subsequent control method.
Further, the braking of the vehicle during bidirectional running can be realized, and the problem that the existing electronic control air pressure braking system cannot realize the bidirectional running function of the vehicle is thoroughly solved.
As shown in fig. 1, in one embodiment, the vehicle includes 6 axles 101 and 3 cars 102. Of course, in other embodiments not shown, the number of the axles 101 and the cars 102 may be other numbers, and is not limited herein.
In a further embodiment, the total number of pneumatic control modules 10 is an even number, and the first brake controller 40, the first electrically controlled foot valve 20 and half of the plurality of pneumatic control modules 10 are in signal communication. That is, the first brake controller 40 and the first electronically controlled foot valve 20 control one half of the pneumatic control module 10, and the second brake controller 50 and the second electronically controlled foot valve 30 control the other half of the pneumatic control module 10.
When the total number of the air pressure control modules 10 is an odd number, the number of the air pressure control modules 10 controlled by the first brake controller 40 and the second brake controller 50 may be balanced as much as possible, for example, the number of the air pressure control modules 10 controlled by the first brake controller 40 is 1 more or 1 less than the number of the air pressure control modules 10 controlled by the second brake controller 50.
The invention also provides a vehicle which can run along two directions and comprises a plurality of axles 101 and a plurality of carriages 102, and comprises the brake control system of any one of the above.
Fig. 4 is a flowchart of a brake control method according to an embodiment of the present invention. The invention also provides a brake control method of a vehicle, which is used for controlling the vehicle, and the brake control method comprises the following steps:
step S10: and judging whether the first electric control foot valve 20 generates the first brake signal, if so, entering the step S20, otherwise, entering the step S30.
Step S20: the plurality of air pressure control modules 10 are controlled to be sequentially activated in the reverse direction of the traveling direction of the vehicle to brake the vehicle.
Step S30: and judging whether the second electric control foot valve 30 generates a second brake signal, if so, entering the step S40, and otherwise, ending the process.
Step S40: the plurality of air pressure control modules 10 are controlled to be sequentially activated in the reverse direction of the traveling direction of the vehicle to brake the vehicle.
In the embodiment, a set of complete electric control air pressure brake response coordination control method is constructed, and the condition that the brake response of the axle 101 which is closer to the rear is more preferred no matter which direction the vehicle runs can be ensured.
In a further embodiment, step S30 or step S40 includes:
the plurality of air pressure control modules 10 are controlled to be sequentially started at preset time intervals in the reverse direction of the traveling direction of the vehicle, and the brake air pressures of the plurality of air pressure control modules 10 are decreased gradually in response to the target air pressure difference value.
The preset time interval may be 20ms, and the brake response target differential pressure value may be 2% P, where P is the maximum set pressure value of the opening degree of the first electronically controlled foot valve 20 or the second electronically controlled foot valve 30. Assuming that the vehicle is a 6-axle vehicle, including 6 air pressure control modules 10, the start time of the first started air pressure control module 10 is t, and the brake air pressure is a, then the start time of the next nth air pressure control module 10 is t + n 20ms, and the brake air pressure is a-2% × P ×.n.
Fig. 5 is a flowchart of a brake control method according to another embodiment of the present invention. As shown in fig. 5, in a further embodiment, step S20 includes:
step S21: sending a first brake control signal to the first brake controller 40;
step S22: the first brake controller 40 sends a first control signal to the second brake controller 50;
step S23: the second brake controller 50 controls the respective pneumatic control modules 10 connected thereto to be sequentially activated in the reverse direction of the traveling direction of the vehicle;
step S24: after each of the air pressure control modules 10 connected to the second brake controller 50 is turned on, the first brake controller 40 controls each of the air pressure control modules 10 connected thereto to be sequentially turned on in a reverse direction of a traveling direction of the vehicle.
In another embodiment, step S40 includes:
step S41: sending a second brake control signal to the second brake controller 50;
step S42: the second brake controller 50 sends a second control signal to the first brake controller 40;
step S43: the first brake controller 40 controls the air pressure control modules 10 connected with the first brake controller to be sequentially started in the reverse direction of the driving direction of the vehicle;
step S44: after each of the air pressure control modules 10 connected to the first brake controller 40 is turned on, the second brake controller 50 controls each of the air pressure control modules 10 connected thereto to be sequentially turned on in a reverse direction of a traveling direction of the vehicle.
Thus, it should be appreciated by those skilled in the art that while a number of exemplary embodiments of the invention have been illustrated and described in detail herein, many other variations or modifications consistent with the principles of the invention may be directly determined or derived from the disclosure of the present invention without departing from the spirit and scope of the invention. Accordingly, the scope of the invention should be understood and interpreted to cover all such other variations or modifications.
Claims (7)
1. A brake control system for a vehicle that is capable of traveling in both directions and that includes a plurality of axles and a plurality of cars, the brake control system comprising:
each air pressure control module is connected with the wheel side brake air chambers at the two ends of each axle through an air passage;
the first electric control foot valve is used for generating a first brake signal during forward driving when being triggered;
the second electric control foot valve is used for generating a second brake signal during reverse driving when being triggered;
the first brake controller, the first electric control foot valve and part of the plurality of pneumatic control modules are in signal connection, and the second brake controller, the second electric control foot valve and the rest plurality of pneumatic control modules are in signal connection;
when the first electrically controlled foot valve generates the first brake signal, sending the first brake signal to the first brake controller;
the first brake controller sending a first control signal to the second brake controller;
the second brake controller controls each air pressure control module connected with the second brake controller to be sequentially started along the reverse direction of the running direction of the vehicle;
after the pneumatic control modules connected with the second brake controller are all started, the first brake controller controls the pneumatic control modules connected with the first brake controller to be started in sequence along the reverse direction of the running direction of the vehicle.
2. The brake control system of a vehicle according to claim 1,
the vehicle comprises 6 axles and 3 carriages.
3. The brake control system of a vehicle according to claim 1 or 2,
the total number of the air pressure control modules is an even number, and the first brake controller, the first electric control foot valve and half of the plurality of air pressure control modules are in signal connection.
4. A vehicle, characterized in that it is drivable in two directions and comprises a plurality of axles and a plurality of carriages, and comprises a brake control system according to any one of claims 1 to 3.
5. A brake control method of a vehicle for controlling the vehicle of claim 4, characterized by comprising:
when the first electric control foot valve generates the first brake signal or the second electric control foot valve generates the second brake signal, controlling the plurality of air pressure control modules to be sequentially started along the reverse direction of the running direction of the vehicle so as to brake the vehicle;
when the first electric control foot valve generates the first brake signal or the second electric control foot valve generates the second brake signal, the step of controlling the plurality of air pressure control modules to be sequentially started along the reverse direction of the driving direction of the vehicle comprises the following steps:
when the first electrically controlled foot valve generates the first brake signal, sending the first brake signal to the first brake controller;
the first brake controller sending a first control signal to the second brake controller;
the second brake controller controls each air pressure control module connected with the second brake controller to be sequentially started along the reverse direction of the running direction of the vehicle;
after the pneumatic control modules connected with the second brake controller are all started, the first brake controller controls the pneumatic control modules connected with the first brake controller to be started in sequence along the reverse direction of the running direction of the vehicle.
6. The brake control method of a vehicle according to claim 5, wherein the step of controlling the sequential activation of the plurality of air pressure control modules in the reverse direction of the traveling direction of the vehicle includes:
and controlling the plurality of air pressure control modules to be sequentially started at preset time intervals along the reverse direction of the running direction of the vehicle, and gradually reducing the brake air pressure of the plurality of air pressure control modules according to the brake response target air pressure difference value.
7. The brake control method for a vehicle according to claim 5 or 6, wherein the step of controlling the plurality of pneumatic control modules to be sequentially activated in a direction opposite to a traveling direction of the vehicle when the first electronically controlled foot valve generates the first brake signal or the second electronically controlled foot valve generates the second brake signal includes:
when the second electric control foot valve generates the second brake signal, sending the second brake signal to the second brake controller;
the second brake controller sending a second control signal to the first brake controller;
the first brake controller controls each air pressure control module connected with the first brake controller to be sequentially started along the reverse direction of the running direction of the vehicle;
after the pneumatic control modules connected with the first brake controller are all started, the second brake controller controls the pneumatic control modules connected with the second brake controller to be started in sequence along the reverse direction of the running direction of the vehicle.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011434988.4A CN112572387B (en) | 2020-12-10 | 2020-12-10 | Brake control system of vehicle, vehicle and brake control method |
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| CN202011434988.4A CN112572387B (en) | 2020-12-10 | 2020-12-10 | Brake control system of vehicle, vehicle and brake control method |
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| CN112572387A CN112572387A (en) | 2021-03-30 |
| CN112572387B true CN112572387B (en) | 2022-02-01 |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN118560443B (en) * | 2024-08-05 | 2024-11-01 | 中联重科股份有限公司 | Electric control braking system and multi-axle vehicle |
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| CN112572387A (en) | 2021-03-30 |
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