CN106945656A - A kind of automobile brake fault diagnosis method for switch - Google Patents
A kind of automobile brake fault diagnosis method for switch Download PDFInfo
- Publication number
- CN106945656A CN106945656A CN201710076339.3A CN201710076339A CN106945656A CN 106945656 A CN106945656 A CN 106945656A CN 201710076339 A CN201710076339 A CN 201710076339A CN 106945656 A CN106945656 A CN 106945656A
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- China
- Prior art keywords
- switch
- control modules
- failure
- esp control
- master cylinder
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- 238000003745 diagnosis Methods 0.000 title claims abstract description 24
- 238000000034 method Methods 0.000 title claims abstract description 17
- 230000001186 cumulative effect Effects 0.000 claims description 12
- 230000004888 barrier function Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
Classifications
-
- 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
- B60T17/22—Devices for monitoring or checking brake systems; Signal devices
-
- 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
- B60T2270/00—Further aspects of brake control systems not otherwise provided for
- B60T2270/40—Failsafe aspects of brake control systems
- B60T2270/406—Test-mode; Self-diagnosis
Landscapes
- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Valves And Accessory Devices For Braking Systems (AREA)
Abstract
The present invention relates to a kind of automobile brake fault diagnosis method for switch, including ESP control modules, it is characterised in that：ESP control modules gather braking light switch signal, ESP control modules gather master cylinder pressure signal by master cylinder pressure sensor, ESP control modules gather GES by vehicle speed sensor, and ESP control modules carry out brake switch failure diagnostic according to braking light switch signal, master cylinder pressure signal, GES.
Description
Technical field
The present invention relates to a kind of automobile brake fault diagnosis method for switch.
Background technology
Switch on and off signal output is realized using metal contact piece more than existing automobile brake switch internal structure, itself can not be real
Existing fault diagnosis.Such as brake switch signal failure or wire harness loop go wrong, and brake switch signal output error causes vehicle
ESP（ESP）Function can not be realized, driven to user and brought danger.
The content of the invention
Present invention aims at a kind of automobile brake fault diagnosis method for switch is provided, brake switch event can be effectively realized
Barrier diagnosis, so as to avoid due to vehicle ESP disabler risks caused by brake switch signal failure.
Realize the technical scheme of the object of the invention：
A kind of automobile brake fault diagnosis method for switch, including ESP control modules, it is characterised in that：ESP control modules collection system
Dynamic lamp switch signal, ESP control modules gather master cylinder pressure signal, ESP control moulds by master cylinder pressure sensor
Block by vehicle speed sensor gather GES, ESP control modules according to braking light switch signal, master cylinder pressure signal,
GES carries out brake switch failure diagnostic.
When master cylinder pressure, which is less than first pressure threshold value, braking light switch action, and speed, is more than speed setting value,
ESP control modules judge that 1 failure occurs in brake switch.
When master cylinder pressure is more than second pressure threshold value, when braking light switch is not operating, ESP control modules judge braking
There is 1 failure in switch.
When master cylinder pressure be less than first pressure threshold value, braking light switch action, speed be more than speed setting value, and on
When the state of stating is continued above 2min, ESP control modules judge that 1 failure occurs in brake switch.
When master cylinder pressure is more than second pressure threshold value, braking light switch is not operating, and above-mentioned state is continued above 1S
When, ESP control modules judge that 1 failure occurs in brake switch.
First pressure threshold value is 7bar, and second pressure threshold value is 15bar, and speed setting value is 20km/h.
Within a power-up cycle cycle, when ESP control modules judge to be less than first pressure threshold value in master cylinder pressure
In the case of, when brake switch failure cumulative number reaches number of stoppages setting value, then ESP control modules judge brake switch first
Failure is set up, and stores Fisrt fault code.
Within a power-up cycle cycle, when ESP control modules judge to be more than second pressure threshold value in master cylinder pressure
In the case of, when brake switch failure cumulative number reaches number of stoppages setting value, then ESP control modules judge brake switch second
Failure is set up, and stores the second failure code.
If within a power-up cycle cycle, Fisrt fault cumulative number does not reach number of stoppages setting value, then on next time
Fisrt fault, which is counted, when electric resets；If within a power-up cycle cycle, the second failure cumulative number does not reach the number of stoppages and set
Definite value, then second failure count is reset when next time is upper electric.
Number of stoppages setting value is 3 times.
The device have the advantages that：
ESP control modules of the present invention carry out brake switch according to braking light switch signal, master cylinder pressure signal, GES
Fault diagnosis, simple and easy to do, diagnosis is reliable, brake switch failure diagnostic is effectively realized, so as to avoid due to brake switch signal
Vehicle ESP disabler risks caused by failure.
The present invention is set when master cylinder pressure is less than first pressure threshold value, braking light switch action, and speed more than speed
During definite value, ESP control modules judge that 1 failure occurs in brake switch.When master cylinder pressure is more than second pressure threshold value, braking
When lamp switch is not operating, ESP control modules judge that 1 failure occurs in brake switch.The present invention is based on master cylinder pressure first pressure
Threshold value, second pressure threshold value, speed setting value carry out breakdown judge, further increase accuracy, the reliability of fault diagnosis.
The present invention is less than first pressure threshold value when master cylinder pressure, and braking light switch action, speed is set more than speed
Value, and above-mentioned state is when being continued above 2min, ESP control modules judge brake switch 1 failure of appearance.When master cylinder pressure
More than second pressure threshold value, braking light switch is not operating, and above-mentioned state is when being continued above 1S, and ESP control modules judge braking
There is 1 failure in switch.Malfunction of the present invention need to persistently reach certain time, and ESP control modules just judge that brake switch goes out
Existing 1 failure, further improves accuracy, the reliability of fault diagnosis, it is to avoid wrong report failure.
The present invention is within a power-up cycle cycle, when ESP control modules judge to be less than the first pressure in master cylinder pressure
In the case of force threshold, when brake switch failure cumulative number reaches number of stoppages setting value, then ESP control modules judge that braking is opened
Close Fisrt fault to set up, store Fisrt fault code；Within a power-up cycle cycle, when ESP control modules are judged in braking
Master cylinder pressure is more than under second pressure threshold condition, when brake switch failure cumulative number reaches number of stoppages setting value, then ESP
Control module judges that the failure of brake switch second is set up, and stores the second failure code.The present invention is accumulative secondary in brake switch failure
When number reaches number of stoppages setting value, ESP control modules just judge brake switch for failure, further improve the standard of fault diagnosis
True property, reliability, it is to avoid wrong report failure.
Through repeatedly testing repeatedly, first pressure threshold value of the present invention is 7bar, and second pressure threshold value is 15bar, speed setting
Value is that 20km/h, number of stoppages setting value are 3, further ensures accuracy, the reliability of fault diagnosis.
Brief description of the drawings
Fig. 1 is ESP control modules of the present invention and the circuit connection diagram of braking light switch；
Fig. 2 is the inventive method FB(flow block).
Embodiment
As shown in figure 1, ESP control modules 2 connect braking light switch 1, braking light switch 1 is normally opened contact, drives Brake lamp
3, while providing a signal to ESP control modules 2.Braking light switch signal original state is 0, after brake pedal, is opened
Pass is acted, and the closing of contact, switching state output is 1.ESP control modules gather braking light switch signal, and ESP control modules pass through
Master cylinder pressure sensor gathers master cylinder pressure signal.
As shown in Fig. 2 ESP control modules gather GES by vehicle speed sensor, ESP control modules are according to Brake lamp
Switching signal, master cylinder pressure signal, GES carry out brake switch failure diagnostic.
It is 7bar, braking light switch action when master cylinder pressure is less than first pressure threshold value（Braking light switch signal shape
State is 1）, and speed is when being more than speed setting value 20km/h, and above-mentioned state is when being continued above 2min, ESP control modules judge
There is 1 failure in brake switch.
When master cylinder pressure is more than second pressure threshold value 15bar, braking light switch is not operating（Braking light switch signal shape
State is 0）When, and above-mentioned state is when being continued above 1S, ESP control modules judge that 1 failure occurs in brake switch.
Within a power-up cycle cycle, when ESP control modules judge to be less than first pressure threshold value in master cylinder pressure
In the case of ESP, when brake switch failure cumulative number reaches number of stoppages setting value, during implementation, number of stoppages setting value is 3
Secondary, then ESP control modules judge that brake switch Fisrt fault is set up, and store Fisrt fault code.
Within a power-up cycle cycle, when ESP control modules judge to be more than second pressure threshold value in master cylinder pressure
In the case of ESP, when brake switch failure cumulative number reaches number of stoppages setting value, during implementation, number of stoppages setting value is 3
Secondary, then ESP control modules judge that the failure of brake switch second is set up, and store the second failure code.
If within a power-up cycle cycle, Fisrt fault cumulative number does not reach number of stoppages setting value, then on next time
Fisrt fault, which is counted, when electric resets；If within a power-up cycle cycle, the second failure cumulative number does not reach the number of stoppages and set
Definite value, then second failure count is reset when next time is upper electric.
Claims (10)
1. a kind of automobile brake fault diagnosis method for switch, including ESP control modules, it is characterised in that：ESP control modules are gathered
Braking light switch signal, ESP control modules gather master cylinder pressure signal, ESP controls by master cylinder pressure sensor
Module gathers GES by vehicle speed sensor, and ESP control modules are believed according to braking light switch signal, master cylinder pressure
Number, GES carry out brake switch failure diagnostic.
2. automobile brake fault diagnosis method for switch according to claim 1, it is characterised in that：When master cylinder pressure is small
In first pressure threshold value, when braking light switch action, and speed are more than speed setting value, ESP control modules judge brake switch
There is 1 failure.
3. automobile brake fault diagnosis method for switch according to claim 2, it is characterised in that：When master cylinder pressure is big
In second pressure threshold value, when braking light switch is not operating, ESP control modules judge that 1 failure occurs in brake switch.
4. automobile brake fault diagnosis method for switch according to claim 3, it is characterised in that：When master cylinder pressure is small
In first pressure threshold value, braking light switch is acted, when speed is continued above 2min more than speed setting value, and above-mentioned state, ESP
Control module judges that 1 failure occurs in brake switch.
5. automobile brake fault diagnosis method for switch according to claim 4, it is characterised in that：When master cylinder pressure is big
In second pressure threshold value, braking light switch is not operating, and above-mentioned state, when being continued above 1S, ESP control modules judge that braking is opened
Close and 1 failure occur.
6. the automobile brake fault diagnosis method for switch according to claim 3-5 any one, it is characterised in that：First pressure
Force threshold is 7bar, and second pressure threshold value is 15bar, and speed setting value is 20km/h.
7. automobile brake fault diagnosis method for switch according to claim 6, it is characterised in that：A power-up cycle week
In phase, when ESP control modules judge to be less than under first pressure threshold condition in master cylinder pressure, brake switch failure is accumulative secondary
When number reaches number of stoppages setting value, then ESP control modules judge that brake switch Fisrt fault is set up, and store Fisrt fault generation
Code.
8. automobile brake fault diagnosis method for switch according to claim 7, it is characterised in that：A power-up cycle week
In phase, when ESP control modules judge to be more than under second pressure threshold condition in master cylinder pressure, brake switch failure is accumulative secondary
When number reaches number of stoppages setting value, then ESP control modules judge that the failure of brake switch second is set up, and store for the second failure generation
Code.
9. automobile brake fault diagnosis method for switch according to claim 8, it is characterised in that：If in a power-up cycle
In cycle, Fisrt fault cumulative number does not reach number of stoppages setting value, then Fisrt fault, which is counted, when next time is upper electric resets；If
In one power-up cycle cycle, the second failure cumulative number does not reach number of stoppages setting value, then the second failure when next time is upper electric
Count and reset.
10. the automobile brake fault diagnosis method for switch according to claim 7-9 any one, it is characterised in that：Failure
Number of times setting value is 3 times.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710076339.3A CN106945656A (en) | 2017-02-13 | 2017-02-13 | A kind of automobile brake fault diagnosis method for switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710076339.3A CN106945656A (en) | 2017-02-13 | 2017-02-13 | A kind of automobile brake fault diagnosis method for switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106945656A true CN106945656A (en) | 2017-07-14 |
Family
ID=59466105
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710076339.3A Pending CN106945656A (en) | 2017-02-13 | 2017-02-13 | A kind of automobile brake fault diagnosis method for switch |
Country Status (1)
| Country | Link |
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| CN (1) | CN106945656A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108791060A (en) * | 2018-06-14 | 2018-11-13 | 安徽江淮汽车集团股份有限公司 | A kind of braking light switch method for diagnosing faults and device |
| CN110194139A (en) * | 2019-05-29 | 2019-09-03 | 中国第一汽车股份有限公司 | Brake test status determines method, apparatus and vehicle |
| CN110749817A (en) * | 2019-10-09 | 2020-02-04 | 北京长城华冠汽车科技股份有限公司 | Brake lamp switch fault detection method and device |
| CN111645662A (en) * | 2020-01-08 | 2020-09-11 | 摩登汽车有限公司 | Two-way switch type brake pedal asynchronous fault diagnosis method and device |
| CN113460021A (en) * | 2021-07-14 | 2021-10-01 | 东风柳州汽车有限公司 | Signal diagnosis method based on brake sensor, brake sensor system and automobile |
| CN114852032A (en) * | 2022-04-02 | 2022-08-05 | 合众新能源汽车有限公司 | Brake switch fault display method, device and system and terminal equipment |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5279152A (en) * | 1991-07-23 | 1994-01-18 | Mcdonnell Douglas Corporation | Apparatus for testing and bleeding automatic braking systems |
| CN101595020A (en) * | 2006-11-30 | 2009-12-02 | 博世株式会社 | Brake switch failure diagnostic method and brake switch failure diagnostic device |
| CN103921783A (en) * | 2014-04-01 | 2014-07-16 | 中国第一汽车股份有限公司 | System and method for recognizing real braking by using brake switch and pressure of brake main cylinder |
-
2017
- 2017-02-13 CN CN201710076339.3A patent/CN106945656A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5279152A (en) * | 1991-07-23 | 1994-01-18 | Mcdonnell Douglas Corporation | Apparatus for testing and bleeding automatic braking systems |
| CN101595020A (en) * | 2006-11-30 | 2009-12-02 | 博世株式会社 | Brake switch failure diagnostic method and brake switch failure diagnostic device |
| CN103921783A (en) * | 2014-04-01 | 2014-07-16 | 中国第一汽车股份有限公司 | System and method for recognizing real braking by using brake switch and pressure of brake main cylinder |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108791060A (en) * | 2018-06-14 | 2018-11-13 | 安徽江淮汽车集团股份有限公司 | A kind of braking light switch method for diagnosing faults and device |
| CN108791060B (en) * | 2018-06-14 | 2020-06-23 | 安徽江淮汽车集团股份有限公司 | Brake lamp switch fault diagnosis method and device |
| CN110194139A (en) * | 2019-05-29 | 2019-09-03 | 中国第一汽车股份有限公司 | Brake test status determines method, apparatus and vehicle |
| CN110749817A (en) * | 2019-10-09 | 2020-02-04 | 北京长城华冠汽车科技股份有限公司 | Brake lamp switch fault detection method and device |
| CN111645662A (en) * | 2020-01-08 | 2020-09-11 | 摩登汽车有限公司 | Two-way switch type brake pedal asynchronous fault diagnosis method and device |
| CN113460021A (en) * | 2021-07-14 | 2021-10-01 | 东风柳州汽车有限公司 | Signal diagnosis method based on brake sensor, brake sensor system and automobile |
| CN114852032A (en) * | 2022-04-02 | 2022-08-05 | 合众新能源汽车有限公司 | Brake switch fault display method, device and system and terminal equipment |
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Application publication date: 20170714 |