CN110146757A - A kind of electromagnetic valve structure method for diagnosing faults for ECAS system - Google Patents
A kind of electromagnetic valve structure method for diagnosing faults for ECAS system Download PDFInfo
- Publication number
- CN110146757A CN110146757A CN201910416039.4A CN201910416039A CN110146757A CN 110146757 A CN110146757 A CN 110146757A CN 201910416039 A CN201910416039 A CN 201910416039A CN 110146757 A CN110146757 A CN 110146757A
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- China
- Prior art keywords
- solenoid valve
- air bag
- electromagnetic valve
- failure
- bag pressure
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
- G01M3/32—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for containers, e.g. radiators
- G01M3/3236—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for containers, e.g. radiators by monitoring the interior space of the containers
- G01M3/3263—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for containers, e.g. radiators by monitoring the interior space of the containers using a differential pressure detector
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/005—Testing of electric installations on transport means
- G01R31/006—Testing of electric installations on transport means on road vehicles, e.g. automobiles or trucks
Abstract
The invention discloses a kind of electromagnetic valve structure method for diagnosing faults for ECAS system, lack the problem of diagnosing to the structural failure of solenoid valve mainly for existing ECAS system.Implementation step is: being sent by ECU to solenoid valve and changes air bag pressure instruction, whether detect corresponding air bag pressure it is anticipated that be changed, and then judge that solenoid valve whether there is structural failure.The present invention utilizes the functional module in existing ECAS system, increase diagnostic logic in a control unit, detection to electromagnetic valve structure failure can be realized without increasing additional module, different alarm signals is issued according to different fault type and fault degree simultaneously, it can be handled in time incipient fault, the security performance of ECAS system is enhanced, and this method exploitativeness is strong, it is easy to accomplish.
Description
Technical field
The invention belongs to automotive electronics fault diagnosis technology fields, more particularly to Electronic Control Air Suspension System
The method for diagnosing faults of solenoid valve, specifically a kind of in (electronic-controlled air suspension, ECAS)
Electromagnetic valve structure method for diagnosing faults for ECAS system.
Background technique
With the fast development of Automobile Electronic Industry, electronic control air suspension system has more and more been applied to various types
Vehicle control system in, solenoid valve is as the key modules in airsuspension system, for controlling between vehicle frame and vehicle body
Highly, there is vital effect to the control performance of airsuspension system.If the appearance functional fault of solenoid valve can be tight
Ghost image rings airsuspension system to the control effect of vehicle body, so some diagnostic methods is needed to prevent the failure of solenoid valve
With identification, the specific source of trouble is navigated to.
The existing solenoid valve fault diagnostic method majority for ECAS system is short for solenoid valve induction coil part
Road and open circuit fault, it is less to be related to the structural failure of electromagnetic valve body part appearance, for example, solenoid valve plugging fault and
Solenoid valve principal fault.In addition, vehicle in actual use, the frequency of occurrences of electromagnetic valve structure failure can be higher than electrical
Property failure be conducive to vehicle performance and safeguard so must be diagnosed to electromagnetic valve structure failure.
Summary of the invention
It is an object of the invention in view of the deficiency of the prior art, propose a kind of electromagnetism for ECAS system
Valve arrangement method for diagnosing faults utilizes the gas being mounted on air bag on the basis of existing solenoid valve failure detection circuit
Pressure sensor identification ECU controls whether to have reached expected result to solenoid valve, and combination failure detection circuit judges electricity in turn
Whether magnet valve there is structural failure, and different alarm signals can occur to driver according to fault type and degree.
The purpose of the present invention is achieved through the following technical solutions: a kind of electromagnetic valve structure for ECAS system
Method for diagnosing faults, the method includes the steps of:
(1) ECU, which detects solenoid valve, whether there is electrical resistance failure, and if so, this fault detection terminates and alarms,
No then follow the steps (2) start structural failure detection；
(2) ECU obtains the air bag pressure value P1 of current time t1 using the baroceptor being mounted on air bag, and judgement is worked as
Whether the difference between preceding air bag pressure value P1 and a upper cycle detection and the air bag pressure value P2 recorded exceeds leak threshold L1,
Beyond then thinking solenoid valve principal fault occur；
(3) ECU sends control signal to solenoid valve, and each air bag pressure is made to increase or reduce atmospheric pressure value Δ P；
(4) corresponding air bag pressure value P2 is detected after ECU waiting time t0 and is recorded, and air bag pressure value P2 and moment are calculated
Difference DELTA p between the air bag pressure value P1 of t1；
(5) if the difference between Δ P and Δ p is greater than error e, then it is assumed that solenoid valve plugging fault occur；
(6) return step (1) after a cycle T is waited to start solenoid valve failure detection next time.
Further, in the step (2),
The air bag pressure difference detected twice thinks that solenoid valve does not leak air failure when being less than leak threshold L1；
The air bag pressure difference detected twice, which is greater than when leak threshold L1 is less than leak threshold L2, thinks that solenoid valve slightly leaks
Gas failure；
The air bag pressure difference detected twice thinks that serious principal fault occurs in solenoid valve when being greater than leak threshold L2.
Further, in the step (5), according to the size identification plugging fault degree of Δ p,
Solenoid valve Severe blockage failure is thought when Δ p is less than or equal to error e；
Think that slight plugging fault occurs in solenoid valve when Δ p is greater than error e.
Further, the increase or reduced atmospheric pressure value Δ P will not influence the normally travel of vehicle.
Further, when to the control signal that solenoid valve is sent being once augmented airbag air pressure before ECU, control next time
Signal processed will reduce air bag pressure；
It to the control signal that solenoid valve is sent is once when reducing air bag pressure before ECU, control signal next time will
It is augmented airbag air pressure.
Further, atmospheric pressure value Δ P, waiting time t0, leak threshold L1 and the leak threshold L2 can be according to differences
Air bag pressure situation adjust in real time.
Further, when there is solenoid valve electrical resistance failure, electromagnetism directly is sent to driver without other diagnosis
Valve failure warning.
Further, when there is solenoid valve principal fault, slight gas leakage then sends conventional caution to driver, serious to leak
Gas then sends parking warning to driver.
Further, conventional caution is sent to driver when there is the slight plugging fault of solenoid valve, when there is solenoid valve
Parking warning is sent to driver when Severe blockage failure.
The beneficial effects of the present invention are: increasing examine in a control unit using the functional module in existing ECAS system
Detection to electromagnetic valve structure failure can be realized without increasing additional module in disconnected logic, while according to different failures
Type and fault degree issue different alarm signals, can be handled in time incipient fault, enhance the safety of ECAS system
Can, and this method exploitativeness is strong, it is easy to accomplish.
Detailed description of the invention
Fig. 1 is the overall procedure block diagram of the method for the present invention；
Fig. 2 is solenoid valve plugging fault overhaul flow chart in the present invention；
Fig. 3 is solenoid valve principal fault overhaul flow chart in the present invention.
Specific embodiment
Referring to the drawings, technical solutions and effects of the present invention is described in further detail.
As shown in Figure 1, ECU detects solenoid valve with the presence or absence of electrical resistance failure first when diagnosis starts every time.If there is
Electrical resistance failure then directly sends to driver and alerts, and starts to diagnose solenoid valve when solenoid valve electrical resistance is normal with the presence or absence of stifled
Plug and principal fault.The time of next cycle is waited to start to diagnose next time after the completion of diagnosis every time, interval between diagnosis T is set as
60 minutes.
As shown in Fig. 2, the diagnosis of solenoid valve plugging fault starts, the air bag gas of t1 at the time of ECU obtains each air bag first
Pressure value P1 is simultaneously recorded, and exports the control signal to solenoid valve, and fixed air pressure secure threshold is raised and lowered in control air bag pressure
Δ P, for the value range of Δ P between 0.01MPa to 0.05MPa, specific size depends on current air bag pressure value, current air bag
Atmospheric pressure value is bigger, and Δ P is bigger, on the contrary then smaller, and guarantee will not have an impact air bag height.
The direction of the control air bag pressure variation of ECU output is with preceding primary on the contrary, reducing diagnostic program as far as possible to air bag gas
The influence of pressure.When to the control signal that solenoid valve is sent being once augmented airbag air pressure i.e. before ECU, control signal next time
To reduce air bag pressure.It to the control signal that solenoid valve is sent is once control next time when reducing air bag pressure before ECU
Signal processed will be augmented airbag air pressure.
In order to make solenoid valve there is sufficient time to carry out inflation/deflation movement, after applying control signal to solenoid valve, when waiting
Between detect corresponding air bag pressure value P2 after t0 and record, between the air bag pressure value P1 for calculating air bag pressure value P2 and moment t1
The general value of difference DELTA p, t0 be 10 seconds.
Solenoid valve Severe blockage failure is thought when Δ p is less than or equal to error e, is less than Δ P simultaneously when Δ p is greater than error e
When think that slight plugging fault occurs in solenoid valve, error e value is 0.3* Δ P.
As shown in figure 3, the last records of values of record when ECU acquires each air bag pressure every time, by each air bag
Corresponding data is stored in EEPROM, guarantees that data are not lost in power down.
When carrying out new primary fault diagnosis, ECU will be recorded in the newest barometric information of each air bag and EEPROM
Corresponding air bag pressure value is compared, if the difference between the air pressure recorded in latest data and EEPROM is greater than leak threshold
Then think solenoid valve principal fault occur when L1 or more, air bag pressure difference is greater than leak threshold L1, while being less than leak threshold
Solenoid valve slight gas leakage is thought when L2；Air bag pressure difference thinks that serious gas leakage event occurs in solenoid valve when being greater than leak threshold L2
Barrier, L2 can be set to 3*L1, typical case value are as follows: L1 is set as 0.01MPa, and L2 is set as 0.03MPa.
When there is slight principal fault, conventional caution information is sent to driver, when there is serious principal fault, to
Driver sends parking warning.
ECU can be according to the real-time size of air bag pressure to above-mentioned parameter: atmospheric pressure value Δ P, waiting time t0, leak threshold L1
It is adjusted with leak threshold L2 etc..
In conclusion the mentioned method of the present invention is based on the air bag pressure sensor in ECAS system, the mentioned method of the present invention
The method to electromagnetic valve structure fault diagnosis is increased on solenoid valve failure diagnostic base in existing ECAS system, is passed through
ECU control air bag pressure is changed, while whether monitoring real-time air bag pressure it is anticipated that generating corresponding variation to realize
Solenoid valve failure diagnosis.This method takes full advantage of the existing capability module of ECAS system, adds diagnostic logic on its basis
Program can fast implement the diagnostic function to electromagnetic valve structure failure, be easy to fast implement in practical ECAS system.
The foregoing is only a preferred embodiment of the present invention, is not intended to limit the scope of the present invention, it is all
Any modifications, equivalent replacements, and improvements etc. done within the spirit and principles in the present invention, should be included in protection of the invention
Within the scope of.
Claims (9)
1. a kind of electromagnetic valve structure method for diagnosing faults for ECAS system, which is characterized in that comprise the steps of:
(1) ECU, which detects solenoid valve, whether there is electrical resistance failure, and if so, this fault detection terminates and alarms, otherwise
It executes step (2) and starts structural failure detection；
(2) ECU obtains the air bag pressure value P1 of current time t1 using the baroceptor being mounted on air bag, judges current gas
Whether the difference between capsule atmospheric pressure value P1 and a upper cycle detection and the air bag pressure value P2 recorded exceeds leak threshold L1, exceeds
Then think solenoid valve principal fault occur；
(3) ECU sends control signal to solenoid valve, and each air bag pressure is made to increase or reduce atmospheric pressure value Δ P；
(4) corresponding air bag pressure value P2 is detected after ECU waiting time t0 and is recorded, and calculates air bag pressure value P2's and moment t1
Difference DELTA p between air bag pressure value P1；
(5) if the difference between Δ P and Δ p is greater than error e, then it is assumed that solenoid valve plugging fault occur；
(6) return step (1) after a cycle T is waited to start solenoid valve failure detection next time.
2. the electromagnetic valve structure method for diagnosing faults according to claim 1 for ECAS system, which is characterized in that institute
It states in step (2),
The air bag pressure difference detected twice thinks that solenoid valve does not leak air failure when being less than leak threshold L1；
The air bag pressure difference detected twice, which is greater than when leak threshold L1 is less than leak threshold L2, thinks the slight gas leakage event of solenoid valve
Barrier；
The air bag pressure difference detected twice thinks that serious principal fault occurs in solenoid valve when being greater than leak threshold L2.
3. the electromagnetic valve structure method for diagnosing faults according to claim 1 for ECAS system, which is characterized in that institute
It states in step (5), according to the size identification plugging fault degree of Δ p,
Solenoid valve Severe blockage failure is thought when Δ p is less than or equal to error e；
Think that slight plugging fault occurs in solenoid valve when Δ p is greater than error e.
4. the electromagnetic valve structure method for diagnosing faults according to claim 1 for ECAS system, it is characterised in that: institute
It states increase or reduced atmospheric pressure value Δ P will not influence the normally travel of vehicle.
5. the electromagnetic valve structure method for diagnosing faults according to claim 1 for ECAS system, it is characterised in that: when
Before ECU once to solenoid valve send control signal be augmented airbag air pressure when, control signal next time will be reduce air bag
Air pressure；
Before ECU once to solenoid valve send control signal be reduce air bag pressure when, control signal next time will be increase
Air vesicle air pressure.
6. the electromagnetic valve structure method for diagnosing faults according to claim 2 for ECAS system, it is characterised in that: institute
Atmospheric pressure value Δ P, waiting time t0, leak threshold L1 and the leak threshold L2 stated can be adjusted in real time according to different air bag pressure situations
It is whole.
7. the electromagnetic valve structure method for diagnosing faults according to claim 1 for ECAS system, it is characterised in that: when
When there is solenoid valve electrical resistance failure, solenoid valve failure warning directly is sent to driver without other diagnosis.
8. the electromagnetic valve structure method for diagnosing faults according to claim 2 for ECAS system, it is characterised in that: when
When there is solenoid valve principal fault, slight gas leakage then sends conventional caution to driver, and serious gas leakage, which is then sent to driver, to stop
Vehicle warning.
9. the electromagnetic valve structure method for diagnosing faults according to claim 3 for ECAS system, it is characterised in that: when
Conventional caution is sent to driver when there is the slight plugging fault of solenoid valve, when there is solenoid valve Severe blockage failure to driving
Member sends parking warning.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910416039.4A CN110146757B (en) | 2019-05-19 | 2019-05-19 | Electromagnetic valve structural fault diagnosis method for ECAS system |
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| CN201910416039.4A CN110146757B (en) | 2019-05-19 | 2019-05-19 | Electromagnetic valve structural fault diagnosis method for ECAS system |
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| CN110146757B CN110146757B (en) | 2021-09-24 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112147442A (en) * | 2020-09-24 | 2020-12-29 | 潍柴动力股份有限公司 | Electromagnetic valve fault detection method and device, vehicle and storage medium |
| CN112379625A (en) * | 2020-11-20 | 2021-02-19 | 广东省建筑设计研究院有限公司 | Double-layer air pillow unit internal pressure control system capable of coping with strong typhoon |
| CN112394282A (en) * | 2020-11-26 | 2021-02-23 | 安徽江淮汽车集团股份有限公司 | Carbon tank electromagnetic valve diagnosis method, device, equipment and storage medium |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112147442A (en) * | 2020-09-24 | 2020-12-29 | 潍柴动力股份有限公司 | Electromagnetic valve fault detection method and device, vehicle and storage medium |
| CN112147442B (en) * | 2020-09-24 | 2023-07-18 | 潍柴动力股份有限公司 | Electromagnetic valve fault detection method and device, vehicle and storage medium |
| CN112379625A (en) * | 2020-11-20 | 2021-02-19 | 广东省建筑设计研究院有限公司 | Double-layer air pillow unit internal pressure control system capable of coping with strong typhoon |
| CN112394282A (en) * | 2020-11-26 | 2021-02-23 | 安徽江淮汽车集团股份有限公司 | Carbon tank electromagnetic valve diagnosis method, device, equipment and storage medium |
| CN112394282B (en) * | 2020-11-26 | 2021-08-27 | 安徽江淮汽车集团股份有限公司 | Carbon tank electromagnetic valve diagnosis method, device, equipment and storage medium |
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Effective date of registration: 20220321 Address after: 310058 Yuhang Tang Road, Xihu District, Hangzhou, Zhejiang 866 Patentee after: ZHEJIANG University Patentee after: Wenzhou Ruili Kemi Automotive Electronics Co., Ltd Address before: 310058 Yuhang Tang Road, Xihu District, Hangzhou, Zhejiang 866 Patentee before: ZHEJIANG University Patentee before: Ruili group Ruian Auto Parts Co., Ltd |