CN111907510A - Redundant brake pedal travel signal implementation method and system - Google Patents
Redundant brake pedal travel signal implementation method and system Download PDFInfo
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- CN111907510A CN111907510A CN202010732314.6A CN202010732314A CN111907510A CN 111907510 A CN111907510 A CN 111907510A CN 202010732314 A CN202010732314 A CN 202010732314A CN 111907510 A CN111907510 A CN 111907510A
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- brake pedal
- brake
- pedal travel
- electric control
- stroke
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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
- B60T17/00—Component parts, details, or accessories of power brake systems not covered by groups B60T8/00, B60T13/00 or B60T15/00, or presenting other characteristic features
- B60T17/18—Safety devices; Monitoring
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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
- B60T15/00—Construction arrangement, or operation of valves incorporated in power brake systems and not covered by groups B60T11/00 or B60T13/00
- B60T15/02—Application and release valves
- B60T15/04—Driver's valves
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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
- B60T7/00—Brake-action initiating means
- B60T7/02—Brake-action initiating means for personal initiation
- B60T7/04—Brake-action initiating means for personal initiation foot actuated
- B60T7/042—Brake-action initiating means for personal initiation foot actuated by electrical means, e.g. using travel or force sensors
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- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Regulating Braking Force (AREA)
Abstract
The invention discloses a redundant brake pedal travel signal realization method and a system, relating to the field of double-loop air pressure braking, wherein the method comprises the steps of establishing a corresponding relation between air pressure of an air outlet of an electric control foot brake valve and the travel of a brake pedal, and generating a relation mapping table; acquiring the air pressure of an air outlet of a current electric control foot brake valve, and inquiring a relation mapping table to obtain the current brake pedal stroke; generating a brake pedal travel signal based on the obtained current brake pedal travel; and sending the generated brake pedal stroke signal to a brake execution system. The invention can effectively ensure the running safety of the vehicle.
Description
Technical Field
The invention relates to the field of double-loop air braking, in particular to a redundant brake pedal travel signal implementation method and system.
Background
The air pressure brake takes compressed air as a brake source, and the compressed air is controlled to enter the wheel brake through the brake pedal, so that the brake of the automobile is realized. The pneumatic brake has the greatest advantages of light operation and capability of providing larger braking torque, and is widely applied to long-wheelbase and multi-axle semitrailers and trailers to realize asynchronous distributed braking.
For air braking, a brake stroke sensor is arranged in an electric control foot brake valve connected with a brake pedal, when braking is carried out, a stroke signal of a driver stepping on the brake pedal is sent out and sent to a brake execution system to serve as a functional logic judgment signal, so that braking of an automobile is realized.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a method and a system for realizing a redundant brake pedal travel signal, which can effectively ensure the running safety of a vehicle.
In order to achieve the above object, the present invention provides a method for implementing a redundant brake pedal travel signal, comprising the steps of:
establishing a corresponding relation between air pressure of an air outlet of an electric control foot brake valve and the travel of a brake pedal, and generating a relation mapping table;
acquiring the air pressure of an air outlet of a current electric control foot brake valve, and inquiring a relation mapping table to obtain the current brake pedal stroke;
generating a brake pedal travel signal based on the obtained current brake pedal travel;
and sending the generated brake pedal stroke signal to a brake execution system.
On the basis of the technical scheme, the air pressure of the air outlet of the electric control foot brake valve is the air pressure of the air outlet of the rear loop of the electric control foot brake valve.
On the basis of the technical scheme, in the allowable treading stroke range of the brake pedal, the size of the stroke of the brake pedal is positively correlated with the brake air pressure output by the brake execution system.
On the basis of the technical scheme, the brake pedal stroke signal is used for reflecting the size of the brake pedal stroke.
On the basis of the technical proposal, the device comprises a shell,
the stroke of the brake pedal consists of a first section of continuous stroke and a second section of continuous stroke, and the second section of continuous stroke is larger than the first section of continuous stroke;
in the relational mapping table, in the first section of stroke, along with the increase of the stroke of the brake pedal, the air pressure of an air outlet of the electric control foot brake valve is gradually increased;
in the relational mapping table, in the second section of stroke, along with the increase of the stroke of the brake pedal, the air pressure of an air outlet of the electric control foot brake valve is kept unchanged.
On the basis of the technical proposal, the device comprises a shell,
when the brake execution system performs braking, the received brake pedal travel signals comprise a first brake pedal travel signal and a second brake pedal travel signal;
the first brake pedal travel signal is from an electric foot brake valve;
the second brake pedal travel signal is a brake pedal travel signal generated after the current brake pedal travel is obtained based on the generated relational mapping table.
On the basis of the technical scheme, when the electric control foot brake valve works normally, the brake execution system receives a first brake pedal travel signal and a second brake pedal travel signal, and the brake execution system performs braking based on the first brake pedal travel signal.
On the basis of the technical scheme, when the electric control foot brake valve fails, the brake execution system only receives the second brake pedal travel signal, and the brake execution system performs braking based on the second brake pedal travel signal.
The invention provides a redundant brake pedal travel signal implementation system, which comprises:
the air pressure sensor is used for acquiring air pressure of an air outlet of the electric control foot brake valve;
the redundant brake controller is used for inquiring the relational mapping table according to the air pressure acquired by the air pressure sensor to obtain the current brake pedal stroke, generating a brake pedal stroke signal and sending the brake pedal stroke signal to the brake execution system.
On the basis of the technical proposal, the device comprises a shell,
the electric control foot brake valve comprises a front loop air outlet and a rear loop air outlet;
the air outlet of the front loop corresponds to a front loop air reservoir connected to the electric control foot brake valve, and the air outlet of the rear loop corresponds to a rear loop air reservoir connected to the electric control foot brake valve;
and the air pressure sensor is positioned on an air path of an air outlet of a rear loop of the electric control foot brake valve.
Compared with the prior art, the invention has the advantages that: the method comprises the steps of establishing a corresponding relation between air pressure of an air outlet of an electric control foot brake valve and travel of a brake pedal, obtaining the air pressure of the air outlet of the current electric control foot brake valve, inquiring a relation mapping table, obtaining the travel of the current brake pedal, generating a travel signal of the brake pedal, sending the travel signal to a brake execution system, and generating a travel signal of the brake pedal when the electric control foot brake valve fails through a redundancy design, so that normal operation of the brake system is guaranteed, and vehicle running safety is effectively guaranteed.
Drawings
FIG. 1 is a flow chart of a method for implementing a redundant brake pedal travel signal in accordance with an embodiment of the present invention;
FIG. 2 is a relational mapping table according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a redundant brake pedal travel signal implementation system according to an embodiment of the present invention.
In the figure: 1-brake pedal, 2-electric control foot brake valve, 3-air pressure sensor, 4-redundant brake controller, 5-brake actuating system, 6-front loop air storage cylinder, 61-front loop air inlet, 62-front loop air outlet, 7-back loop air storage cylinder, 71-back loop air inlet, 72-back loop air outlet.
Detailed Description
The embodiment of the invention provides a redundant brake pedal travel signal implementation method, which is characterized in that a set of redundant system is additionally arranged on an electric control foot brake valve, so that when the electric control foot brake valve fails, a brake pedal travel signal can still be generated, the normal operation of a brake system is ensured, and the running safety of a vehicle is effectively ensured. The embodiment of the invention correspondingly provides a redundant brake pedal travel signal implementation system.
The present invention will be described in further detail with reference to the accompanying drawings and examples. As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
Referring to fig. 1, a redundant brake pedal travel signal implementation method provided by the embodiment of the invention includes the following steps:
s1: and establishing a corresponding relation between the air pressure of an air outlet of the electric control foot brake valve and the travel of the brake pedal, and generating a relation mapping table.
In the embodiment of the invention, the air pressure of the air outlet of the electric control foot brake valve is positively correlated with the stroke of the brake pedal, the electric control foot brake valve is connected with the brake pedal, the air pressure of the air outlet of the electric control foot brake valve changes along with the stepping of the brake pedal of a driver, the larger the stroke of the brake pedal is, the larger the air pressure of the air outlet of the electric control foot brake valve is, and the air pressure of the air outlet of the electric control foot brake valve does not change along with the stepping of the brake pedal after the brake pedal is stepped to a certain degree. Because the air outlet of the electric control foot brake valve comprises a front loop air outlet and a rear loop air outlet, the air pressure of the air outlet of the electric control foot brake valve in the embodiment of the invention is the air pressure of the air outlet of the rear loop of the electric control foot brake valve.
In the embodiment of the invention, the stroke of the brake pedal consists of a first section of continuous stroke and a second section of continuous stroke, and the second section of continuous stroke is greater than the first section of continuous stroke; in the relational mapping table, in the first section of stroke, along with the increase of the stroke of the brake pedal, the air pressure of an air outlet of the electric control foot brake valve is gradually increased; in the relational mapping table, in the second section of stroke, along with the increase of the stroke of the brake pedal, the air pressure of an air outlet of the electric control foot brake valve is kept unchanged. Specifically, referring to fig. 2, it is a mapping table of the relationship between the air pressure at the air outlet of the electric control foot brake valve and the travel of the brake pedal, where the abscissa represents the travel of the brake pedal, and the ordinate represents the air pressure at the air outlet of the electric control foot brake valve, as shown by the solid line in fig. 2, when the travel of the brake pedal is gradually increased within the range of 2mm to 9.5mm, the air pressure at the air outlet of the electric control foot brake valve is gradually increased, and when the travel of the brake pedal is greater than 9.5mm, the air pressure at the air outlet of the electric control foot brake valve is not. And then, according to the relational mapping table, when the air pressure of the air outlet of the electric control foot brake valve is obtained, the current brake pedal stroke can be known, so that a corresponding brake pedal stroke signal is generated, and the redundant processing of the brake pedal signal is realized.
S2: and acquiring the air pressure of the air outlet of the current electric control foot brake valve, and inquiring the relation mapping table to obtain the current brake pedal stroke.
In the embodiment of the invention, the air pressure at the air outlet of the electric control foot brake valve is obtained in real time, the purpose of redundancy is realized, no matter whether the electric control foot brake valve works normally, the travel of the brake pedal can be obtained according to the air pressure at the air outlet of the electric control foot brake valve, the travel signal of the brake pedal is generated, the generated travel signal of the brake pedal is used as a redundancy signal, and when the electric control foot brake valve fails, the normal braking of a vehicle can be realized according to the redundancy signal, so that the running safety of the vehicle is ensured.
S3: a brake pedal travel signal is generated based on the obtained current brake pedal travel.
In the embodiment of the invention, the brake pedal stroke signal is used for reflecting the magnitude of the brake pedal stroke. Within the allowable pedal stroke range of the brake pedal, the size of the brake pedal stroke is positively correlated with the brake air pressure output by the brake execution system.
S4: and sending the generated brake pedal stroke signal to a brake execution system. The brake execution system in the embodiment of the invention is a device for realizing vehicle braking, such as a front axle wheel end brake chamber, a drive axle wheel end brake chamber and the like.
Because the redundant brake pedal travel signal implementation method can generate the brake pedal travel signal and send the brake pedal travel signal to the brake execution system, the brake execution system can receive 2 brake pedal travel signals when braking. Specifically, the brake pedal travel signals received by the brake execution system during braking comprise a first brake pedal travel signal and a second brake pedal travel signal; the first brake pedal stroke signal is from an electric foot brake valve; the second brake pedal travel signal is a brake pedal travel signal generated after the current brake pedal travel is obtained based on the generated relational mapping table.
When the electric control foot brake valve works normally, the brake execution system receives a first brake pedal stroke signal and a second brake pedal stroke signal, and at the moment, the brake execution system performs braking based on the first brake pedal stroke signal; when the electric control foot brake valve fails, the brake execution system only receives the second brake pedal travel signal, and at the moment, the brake execution system performs braking based on the second brake pedal travel signal. Through the redundancy arrangement, no matter whether the electric control foot brake valve works normally, the brake execution system can always receive the stroke signal of the brake pedal to brake, and the normal operation of the vehicle brake system is effectively ensured.
According to the redundant brake pedal travel signal implementation method, the corresponding relation between the air pressure of the air outlet of the electric control foot brake valve and the travel of the brake pedal is established, the air pressure of the air outlet of the current electric control foot brake valve is obtained, the relation mapping table is inquired, the current brake pedal travel can be obtained and generated, a brake pedal travel signal is generated and then sent to the brake execution system, and through the redundant design, when the electric control foot brake valve fails, the brake pedal travel signal can still be generated, the normal operation of the brake system is guaranteed, and the vehicle running safety is effectively guaranteed.
The embodiment of the invention also provides a redundant brake pedal travel signal implementation system, which is used for implementing the redundant brake pedal travel signal implementation method, and is shown in fig. 3, and the redundant brake pedal travel signal implementation system of the embodiment of the invention comprises an air pressure sensor 3 and a redundant brake controller 4.
The air pressure sensor 3 is used for acquiring the air pressure at the air outlet of the electric control foot brake valve 2; the redundant brake controller 4 is stored with a relational mapping table of the corresponding relation between the air pressure of the air outlet of the electric control foot brake valve 2 and the travel of the brake pedal, and the redundant brake controller 4 is used for inquiring the relational mapping table according to the air pressure obtained by the air pressure sensor 3 to obtain the current travel of the brake pedal, generating a brake pedal travel signal and sending the brake pedal travel signal to the brake execution system 5. The electric control foot brake valve is connected with the brake pedal 1.
The electric control foot brake valve 2 comprises a front loop air outlet 62 and a rear loop air outlet 72; the front loop air outlet 62 corresponds to a front loop air reservoir 6 connected to the electric control foot brake valve 2, and the rear loop air outlet 72 corresponds to a rear loop air reservoir 7 connected to the electric control foot brake valve 2; the air pressure sensor 3 is located on the air path of the air outlet 72 of the back loop of the electric control foot brake valve 2 and used for obtaining the air pressure of the air outlet 72 of the back loop of the electric control foot brake valve 2, and the air pressure sensor 3 is electrically connected with the redundant brake controller 4.
According to the redundant brake pedal stroke signal implementation system provided by the embodiment of the invention, the air pressure sensor 3 is arranged on the air outlet of the electric control foot brake valve, and the corresponding relation between the air pressure of the air outlet of the electric control foot brake valve 2 and the stroke of the brake pedal 1 is established, when the electric control foot brake valve 2 fails, the stroke of the brake pedal can be still obtained and a brake pedal stroke signal can be generated according to the air pressure of the air outlet of the electric control foot brake valve 2, so that the normal operation of the brake system is ensured, and the running safety of a vehicle is effectively ensured.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
Claims (10)
1. A redundant brake pedal travel signal implementation method is characterized by comprising the following steps:
establishing a corresponding relation between air pressure of an air outlet of an electric control foot brake valve and the travel of a brake pedal, and generating a relation mapping table;
acquiring the air pressure of an air outlet of a current electric control foot brake valve, and inquiring a relation mapping table to obtain the current brake pedal stroke;
generating a brake pedal travel signal based on the obtained current brake pedal travel;
and sending the generated brake pedal stroke signal to a brake execution system.
2. A redundant brake pedal travel signal implementation method as claimed in claim 1 wherein: and the air pressure of the air outlet of the electric control foot brake valve is the air pressure of the air outlet of a back loop of the electric control foot brake valve.
3. A redundant brake pedal travel signal implementation method as claimed in claim 1 wherein: within the allowable treading travel range of the brake pedal, the size of the brake pedal travel is positively correlated with the brake air pressure output by the brake execution system.
4. A redundant brake pedal travel signal implementation method as set forth in claim 3 wherein: the brake pedal travel signal is used for reflecting the size of the brake pedal travel.
5. A redundant brake pedal travel signal implementation method as claimed in claim 1 wherein:
the stroke of the brake pedal consists of a first section of continuous stroke and a second section of continuous stroke, and the second section of continuous stroke is larger than the first section of continuous stroke;
in the relational mapping table, in the first section of stroke, along with the increase of the stroke of the brake pedal, the air pressure of an air outlet of the electric control foot brake valve is gradually increased;
in the relational mapping table, in the second section of stroke, along with the increase of the stroke of the brake pedal, the air pressure of an air outlet of the electric control foot brake valve is kept unchanged.
6. A redundant brake pedal travel signal implementation method as claimed in claim 1 wherein:
when the brake execution system performs braking, the received brake pedal travel signals comprise a first brake pedal travel signal and a second brake pedal travel signal;
the first brake pedal travel signal is from an electric foot brake valve;
the second brake pedal travel signal is a brake pedal travel signal generated after the current brake pedal travel is obtained based on the generated relational mapping table.
7. A redundant brake pedal travel signal implementation method as set forth in claim 6 wherein: when the electric control foot brake valve works normally, the brake execution system receives a first brake pedal travel signal and a second brake pedal travel signal, and the brake execution system performs braking based on the first brake pedal travel signal.
8. A redundant brake pedal travel signal implementation method as set forth in claim 6 wherein: when the electric control foot brake valve fails, the brake execution system only receives the second brake pedal stroke signal, and the brake execution system performs braking based on the second brake pedal stroke signal.
9. A redundant brake pedal travel signal implementation system, comprising:
the air pressure sensor is used for acquiring air pressure of an air outlet of the electric control foot brake valve;
the redundant brake controller is used for inquiring the relational mapping table according to the air pressure acquired by the air pressure sensor to obtain the current brake pedal stroke, generating a brake pedal stroke signal and sending the brake pedal stroke signal to the brake execution system.
10. A redundant brake pedal travel signal enabling system according to claim 9, wherein:
the electric control foot brake valve comprises a front loop air outlet and a rear loop air outlet;
the air outlet of the front loop corresponds to a front loop air reservoir connected to the electric control foot brake valve, and the air outlet of the rear loop corresponds to a rear loop air reservoir connected to the electric control foot brake valve;
and the air pressure sensor is positioned on an air path of an air outlet of a rear loop of the electric control foot brake valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010732314.6A CN111907510B (en) | 2020-07-27 | 2020-07-27 | Redundant brake pedal travel signal implementation method and system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010732314.6A CN111907510B (en) | 2020-07-27 | 2020-07-27 | Redundant brake pedal travel signal implementation method and system |
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| CN111907510A true CN111907510A (en) | 2020-11-10 |
| CN111907510B CN111907510B (en) | 2021-08-06 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201511953U (en) * | 2009-10-27 | 2010-06-23 | 东风汽车有限公司 | Active control device for automobile brake |
| CN102120450A (en) * | 2011-01-26 | 2011-07-13 | 瑞立集团瑞安汽车零部件有限公司 | Main brake valve with electronic-control pneumatic-control dual-circuit signals |
| CN102303595A (en) * | 2011-06-27 | 2012-01-04 | 上海理工大学 | Stable brake control device for vehicle |
| CN206501842U (en) * | 2017-02-27 | 2017-09-19 | 安徽江淮汽车集团股份有限公司 | Air-pressure brake control system |
| CN111071229A (en) * | 2019-12-31 | 2020-04-28 | 一汽解放汽车有限公司 | Air-assisted hydraulic braking system and new energy automobile |
-
2020
- 2020-07-27 CN CN202010732314.6A patent/CN111907510B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201511953U (en) * | 2009-10-27 | 2010-06-23 | 东风汽车有限公司 | Active control device for automobile brake |
| CN102120450A (en) * | 2011-01-26 | 2011-07-13 | 瑞立集团瑞安汽车零部件有限公司 | Main brake valve with electronic-control pneumatic-control dual-circuit signals |
| CN102303595A (en) * | 2011-06-27 | 2012-01-04 | 上海理工大学 | Stable brake control device for vehicle |
| CN206501842U (en) * | 2017-02-27 | 2017-09-19 | 安徽江淮汽车集团股份有限公司 | Air-pressure brake control system |
| CN111071229A (en) * | 2019-12-31 | 2020-04-28 | 一汽解放汽车有限公司 | Air-assisted hydraulic braking system and new energy automobile |
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| CN111907510B (en) | 2021-08-06 |
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