CN108678881A - The detection method and detection device of fuel injector reliability - Google Patents
The detection method and detection device of fuel injector reliability Download PDFInfo
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- CN108678881A CN108678881A CN201810252631.0A CN201810252631A CN108678881A CN 108678881 A CN108678881 A CN 108678881A CN 201810252631 A CN201810252631 A CN 201810252631A CN 108678881 A CN108678881 A CN 108678881A
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- Prior art keywords
- fuel
- volume
- fuel injector
- consumption
- fuel oil
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M65/00—Testing fuel-injection apparatus, e.g. testing injection timing ; Cleaning of fuel-injection apparatus
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M65/00—Testing fuel-injection apparatus, e.g. testing injection timing ; Cleaning of fuel-injection apparatus
- F02M65/006—Measuring or detecting fuel leakage of fuel injection apparatus
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
Abstract
The invention belongs to failure of fuel system detection technique fields, and in particular to a kind of detection method and detection device of fuel injector reliability.The detection method of fuel injector reliability of the present invention, includes the following steps：The fuel injection amount of fuel injector is calculated according to ECU；When fuel injection amount is equal to fuel consumption calibration value, starts liquid level sensor and fuel oil residual volume is detected；According to the difference for the fuel oil residual volume that the fuel oil total volume and liquid level sensor that are stored in the EEPROM detect, fuel oil actual consumption volume is calculated；Fuel oil actual consumption volume is compared with fuel consumption calibration value, determines whether fuel injector occurs to block or wear.It by using the detection method and detection device of fuel injector reliability of the present invention, can be effectively detected whether fuel injector works normally, to remind related personnel's repair in time or replace fuel injector, promote the dynamic property, economy and safety of vehicle.
Description
Technical field
The invention belongs to failure of fuel system detection technique fields, and in particular to a kind of detection method of fuel injector reliability
And detection device.
Background technology
Along with the gradually upgrading of domestic automobile pollutant emission regulation, the electronic control technology of engine art is able to develop simultaneously
It comes into operation.The engine different from the past that fuel feeding is controlled using mechanical pump, the control system of electric-controlled co-rail engine is by connecing
The signal of each sensor is received, and exports fuel injection pulse signal to fuel injector.By means of the solenoid valve on fuel injector, it is accurately controlled
Fuel injection amount and corresponding injecting time, by work by combustion in atomized diesel fuel direct cylinder injection to provide energy.It protects as a result,
Demonstrate,prove diesel engine best ratio of combustion, atomization and the best duration of ignition and good economy and minimum disposal of pollutants.
In diesel engine operational process, high-pressure work is in electronic control system from high-pressure oil pump to fuel injector
Environment, along with the influence of the factors such as usage time, fuel qualities, filter smoothing effect, the spray orifice of fuel injector easily occurs
Abrasion blocks.After fuel injector occurs abrasion or blocks, under same common rail pipe fuel pressure and power-up time, distributive value will
Improve or reduce, be easy to cause that engine power is insufficient or oil consumption is high, and no matter occur which kind of situation all leverage it is whole
The safety and stability of machine operation.
Invention content
The purpose of the present invention is to solve above-mentioned at least one problem, which is by the following technical programs
It realizes.
The present invention proposes a kind of detection method of fuel injector reliability, including following steps：
The fuel injection amount in fuel tank is calculated according to ECU, meanwhile, by the institute before the fuel injection amount and fuel oil injection
It states in the fuel oil total volume deposit EEPROM in fuel tank；
When the fuel injection amount that the ECU is calculated is equal to fuel consumption calibration value, start liquid level sensor to the combustion
Fuel oil residual volume in fuel tank is detected；
According in the fuel tank stored in the EEPROM fuel oil total volume and the liquid level sensor detect
Fuel oil residual volume difference, fuel oil actual consumption volume is calculated；
The fuel oil actual consumption volume is compared with the fuel consumption calibration value, determines whether fuel injector blocks up
Plug or abrasion.
Further, the detection method of fuel injector reliability as described above, when the fuel oil actual consumption volume and institute
When stating the difference of fuel consumption calibration value more than calibration threshold value, it is determined that amount of fuel consumption is big, and checks that the fuel injector is
It is no to wear.
Further, the detection method of fuel injector reliability as described above, when the fuel oil actual consumption volume and institute
When stating the difference of fuel consumption calibration value less than calibration threshold value, it is determined that amount of fuel consumption is small, and checks that the fuel injector is
It is no to block.
Further, the detection method of fuel injector reliability as described above, when the fuel oil actual consumption volume and institute
When stating the difference of fuel consumption calibration value in calibration threshold range, it is determined that fuel consumption is normal, at the fuel injector
In reliable behavior.
Further, the detection method of fuel injector reliability as described above, it is described after the fuel injector n times start
When the fuel injection amount that ECU is calculated is equal to the sum of the fuel consumption volume stored in fuel consumption calibration value and the EEPROM,
Start liquid level sensor to be detected the fuel oil actual volume in the fuel tank, wherein the fuel oil injection that the ECU is calculated
Amount is equal to the sum of described fuel injector n times fuel injection amount, and the fuel consumption volume stored in the EEPROM is equal to the oil spout
The sum of fuel injection amount before the injection of device n-th.
Further, the detection method of fuel injector reliability as described above, fuel consumption described in each fuel-injected
Calibration value is determined according to system requirements.
The invention also provides a kind of detection device of fuel injector reliability, the fuel injector for executing described above is reliable
The detection method of property, including：
ECU, the ECU are used to calculate the fuel injection amount of the fuel injector；
Liquid level sensor, the liquid level sensor is set in the fuel tank, for detecting the fuel oil in the fuel tank
Residual volume；
Storage unit, the combustion in the fuel tank before fuel injection amount and fuel oil injection for storing the fuel injector
Oily total volume；
Control unit, for receiving by the fuel oil of the ECU fuel injection amounts calculated and liquid level sensor detection
Residual volume, and the fuel oil total volume that fuel oil residual volume is stored up with the memory cell is made the difference, fuel oil reality is calculated
Border consumes volume, and the fuel oil actual consumption volume is compared with fuel consumption calibration value, determines whether fuel injector occurs
It blocks or wears.
Further, the detection device of fuel injector reliability as described above, the storage unit are EEPROM.
By using the detection method and detection device of fuel injector reliability of the present invention, spray can be effectively detected
Whether oily device works normally, and to remind related personnel's repair in time or replace fuel injector, promotes dynamic property, the economy of vehicle
And safety, while can also by fuel consumption volume that ECU fuel injection amount and the liquid level sensors calculated detects it
Between mutual verification, judge the reliability of liquid level sensor.
Description of the drawings
By reading the detailed description of hereafter preferred embodiment, various other advantages and benefit are common for this field
Technical staff will become clear.Attached drawing only for the purpose of illustrating preferred embodiments, and is not considered as to the present invention
Limitation.And throughout the drawings, the same reference numbers will be used to refer to the same parts.In the accompanying drawings：
Fig. 1 is the flow chart of the detection method of fuel injector reliability described in specific implementation mode；
Fig. 2 is the structure diagram of the detection device of fuel injector reliability described in specific implementation mode.
Each label is as follows in attached drawing：
10：ECU、20：Liquid level sensor, 30：Storage unit, 40：Control unit.
Specific implementation mode
The illustrative embodiments of the disclosure are more fully described below with reference to accompanying drawings.Although showing this public affairs in attached drawing
The illustrative embodiments opened, it being understood, however, that may be realized in various forms the disclosure without the reality that should be illustrated here
The mode of applying is limited.It is to be able to be best understood from the disclosure on the contrary, providing these embodiments, and can be by this public affairs
The range opened completely is communicated to those skilled in the art.
Fig. 2 is the structure diagram of the detection device of fuel injector reliability described in specific implementation mode.As shown in Fig. 2, this reality
The detection device for applying the fuel injector reliability in example, including：ECU10, liquid level sensor 20, storage unit 30 and control are single
Member 40.ECU10 is used to calculate the fuel injection amount of fuel injector, and liquid level sensor 20 is set in fuel tank, for detecting fuel tank
Interior fuel oil real surplus volume, storage unit 30 are used to store the fuel injection amount in fuel tank and the fuel oil before fuel oil injection
Fuel oil total volume in case, control unit 40 is used to receive the fuel injection amount calculated by ECU10 and liquid level sensor 20 detects
Fuel oil residual volume, and the fuel oil total volume stored in fuel oil residual volume and storage unit 30 is made the difference, combustion is calculated
Oily actual consumption volume, and fuel oil actual consumption volume is compared with fuel consumption calibration value, determine whether fuel injector occurs
It blocks or wears.
Wherein, storage unit 30 is EEPROM.
In the present embodiment, without increasing the manufacturing cost of vehicle, using the existing structure of Vehicular system, by fuel tank
Liquid level sensor 20 measures the fuel oil residual volume in fuel tank, and is made the difference with the fuel oil total volume stored in EEPROM, calculates
Go out the fuel oil actual consumption volume in fuel tank.Fuel oil actual consumption volume and fuel consumption calibration value are made the difference again, and by its
Difference quotes corresponding DFC (Diagnostic Fault Check, trouble shooting code) compared with calibration threshold value, to
Determine the state of fuel injector.
Wherein, EEPROM (Electrically Erasable Programmable Read-Only Memory) is charged
Erasable programmable read-only memory is the storage chip that data will not lose after a kind of power down.Fuel consumption calibration value being capable of root
It is determined, can be demarcated according to actual conditions according to the demand of system.Calibration threshold value be a value range, have upper limit value and
Lower limiting value.
The reliability of fuel injector is detected by using the detection device of fuel injector reliability of the present invention, is wrapped
Include following steps：
The fuel injection amount of fuel injector is calculated according to ECU10, meanwhile, by the fuel tank before fuel injection amount and fuel oil injection
In interior fuel oil total volume deposit EEPROM.
When vehicle is run, the fuel injection amount of fuel injector is calculated by ECU10, i.e. calculating is sprayed by fuel injector
This fuel injection amount is recorded in EEPROM by fuel bulk.Due to when fuel injector occurs abrasion or blocks, passing through ECU10
The fuel injection amount of calculating is not the actual ejection volume of fuel oil, therefore, when fuel filling is completed, by the combustion in fuel tank
In oily total volume deposit EEPROM, calculated for the fuel oil actual consumption volume after spraying fuel oil.
When the fuel injection amount that ECU10 is calculated is equal to fuel consumption calibration value, start liquid level sensor 20 to fuel tank
Interior fuel oil residual volume is detected.
According to the fuel oil total volume and the fuel oil residual body that detects of liquid level sensor in the fuel tank stored in EEPROM
Fuel oil actual consumption volume is calculated in long-pending difference.
Fuel oil actual consumption volume is compared with fuel consumption calibration value, determines whether fuel injector occurs to block or grind
Damage.
Wherein, when fuel oil actual consumption volume and the difference of fuel consumption calibration value are more than the upper limit value of calibration threshold value,
It then determines that amount of fuel consumption is big, and quotes corresponding DFC, need to check whether fuel injector wears at this time.
When fuel oil actual consumption volume and the difference of fuel consumption calibration value are less than the lower limiting value of calibration threshold value, it is determined that
Amount of fuel consumption is small, and quotes corresponding DFC, needs to check whether fuel injector blocks at this time.
In above-mentioned two situations, such as inspection fuel injector no problem, then illustrate that the measurement of liquid level sensor 20 is inaccurate, this
When should detect whether liquid level sensor 20 breaks down, so as to on-call maintenance or replace liquid level sensor.
When fuel oil actual consumption volume and the difference of fuel consumption calibration value are in calibration threshold range, it is determined that combustion
Oilconsumption is normal, and fuel injector is in reliable behavior.
After the completion of once being filled due to fuel tank, all tasks can not be completed, need to repeatedly carry out the filling of fluid,
It needs to stop fuel injector operation during oil filling.After fuel injector carries out n times startup, the fuel injection amount of ECU10 calculating
When equal to the sum of the fuel consumption volume stored in fuel consumption calibration value and EEPROM, start liquid level sensor 20 to fuel tank
Interior fuel oil residual volume is detected.Wherein, ECU10 calculate fuel injection amount be equal to fuel injector n times fuel injection amount it
Be equal to the sum of fuel injection amount before the injection of fuel injector n-th with, the fuel consumption volume stored in EEPROM, i.e., before (N-1)
The sum of secondary fuel injection amount.
Since the numerical value of ECU10 records is accumulated value, after fuel injector repeatedly start, the fuel oil injection of ECU calculating
Amount is also the accumulated value after multiple fuel injection.
Wherein, (N-1) secondary fuel oil actual consumption volume before fuel injection amount (N-1) secondary before fuel injector is equal to, or place
Within the scope of allowable error.(N-1) is secondary before fuel injector should be at working in the state that fuel injector is normal, if wherein certain
In primary course of injection, operation irregularity occurs for fuel injector, then the i.e. detectable fuel injector in the fuel injector injection process of this time
Abrasion occurs or blocks, fuel injector should be repaired or replaced in time, so that fuel injector can work normally later.
The detection method can also indirectly reflect the problem of fuel liquid level reduces (oil leak etc.) extremely in fuel tank.When
When such problem occurs, the too many DFC of fuel consumption can be quoted.If checking the equal no problem of the components such as fuel injector and liquid level sensor
When, it is considered as whether fuel system leaks.
By using the detection method and detection device of fuel injector reliability of the present invention, spray can be effectively detected
Whether oily device works normally, and to remind related personnel's repair in time or replace fuel injector, promotes dynamic property, the economy of vehicle
And safety, while can also by fuel consumption volume that ECU fuel injection amount and the liquid level sensors calculated detects it
Between mutual verification, judge the reliability of liquid level sensor.And the present invention is detected using the vehicle prior art, life cycle
It is long, it is applied widely, different types of machines can be suitable for for a long time.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
Any one skilled in the art in the technical scope disclosed by the present invention, the change or replacement that can be readily occurred in,
It should be covered by the protection scope of the present invention.Therefore, protection scope of the present invention should be with the protection model of the claim
Subject to enclosing.
Claims (8)
1. a kind of detection method of fuel injector reliability, which is characterized in that include the following steps：
The fuel injection amount of fuel injector is calculated according to ECU, meanwhile, by the fuel oil before the fuel injection amount and fuel oil injection
In fuel oil total volume deposit EEPROM in case；
When the fuel injection amount that the ECU is calculated is equal to fuel consumption calibration value, start liquid level sensor to the fuel tank
Interior fuel oil residual volume is detected；
According in the fuel tank stored in the EEPROM fuel oil total volume and the combustion that detects of the liquid level sensor
Fuel oil actual consumption volume is calculated in the difference of oily residual volume；
The fuel oil actual consumption volume is compared with the fuel consumption calibration value, determine fuel injector whether occur block or
Abrasion.
2. the detection method of fuel injector reliability according to claim 1, which is characterized in that when the fuel oil actual consumption
When volume and the difference of the fuel consumption calibration value are more than calibration threshold value, it is determined that amount of fuel consumption is big, and described in inspection
Whether fuel injector wears.
3. the detection method of fuel injector reliability according to claim 1, which is characterized in that when the fuel oil actual consumption
When volume and the difference of the fuel consumption calibration value are less than calibration threshold value, it is determined that amount of fuel consumption is small, and described in inspection
Whether fuel injector blocks.
4. the detection method of fuel injector reliability according to claim 1, which is characterized in that when the fuel oil actual consumption
When volume and the difference of the fuel consumption calibration value are in calibration threshold range, it is determined that fuel consumption is normal, described
Fuel injector is in reliable behavior.
5. the detection method of the fuel injector reliability according to any one of claim 1-4, which is characterized in that when the spray
After oily device n times start, the fuel injection amount that the ECU is calculated is equal to the combustion stored in fuel consumption calibration value and the EEPROM
When the sum of oil consumption volume, starts liquid level sensor and the fuel oil actual volume in the fuel tank is detected, wherein is described
The fuel injection amount that ECU is calculated is equal to the sum of described fuel injector n times fuel injection amount, the fuel consumption stored in the EEPROM
Volume is equal to the sum of the fuel injection amount before fuel injector n-th injection.
6. the detection method of the fuel injector reliability according to any one of claim 1-4, which is characterized in that each fuel oil
The fuel consumption calibration value of injection is determined according to system requirements.
7. a kind of detection device of fuel injector reliability, for executing the fuel injector described in any one of the claims 1-4
The detection method of reliability, which is characterized in that including：
ECU, the ECU are used to calculate the fuel injection amount of the fuel injector；
Liquid level sensor, the liquid level sensor are set in the fuel tank, for detecting the residue of the fuel oil in the fuel tank
Volume；
Storage unit, the fuel oil in the fuel tank before fuel injection amount and fuel oil injection for storing the fuel injector are total
Volume；
Control unit, it is remaining by the fuel oil of the ECU fuel injection amounts calculated and liquid level sensor detection for receiving
Volume, and the fuel oil total volume that fuel oil residual volume is stored up with the memory cell is made the difference, is calculated that fuel oil is practical to disappear
Volume is consumed, and the fuel oil actual consumption volume is compared with fuel consumption calibration value, determines whether fuel injector blocks
Or abrasion.
8. the detection device of fuel injector reliability according to claim 7, which is characterized in that the storage unit is
EEPROM。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810252631.0A CN108678881B (en) | 2018-03-26 | 2018-03-26 | Method and device for detecting reliability of oil injector |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810252631.0A CN108678881B (en) | 2018-03-26 | 2018-03-26 | Method and device for detecting reliability of oil injector |
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| Publication Number | Publication Date |
|---|---|
| CN108678881A true CN108678881A (en) | 2018-10-19 |
| CN108678881B CN108678881B (en) | 2020-06-26 |
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| CN201810252631.0A Active CN108678881B (en) | 2018-03-26 | 2018-03-26 | Method and device for detecting reliability of oil injector |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112228229A (en) * | 2020-10-13 | 2021-01-15 | 江苏里斯特通用机械制造有限公司 | Variable fuel pressure electric injection system and engine thereof |
| CN113811766A (en) * | 2019-05-15 | 2021-12-17 | 日立造船株式会社 | Device for dissolution test of medicament in digestive organ |
| CN114442587A (en) * | 2021-12-21 | 2022-05-06 | 潍柴动力股份有限公司 | Method and system for monitoring abnormal power failure of engine and storage medium |
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| CN113811766A (en) * | 2019-05-15 | 2021-12-17 | 日立造船株式会社 | Device for dissolution test of medicament in digestive organ |
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| CN114442587A (en) * | 2021-12-21 | 2022-05-06 | 潍柴动力股份有限公司 | Method and system for monitoring abnormal power failure of engine and storage medium |
| CN114442587B (en) * | 2021-12-21 | 2024-04-16 | 潍柴动力股份有限公司 | Engine abnormal power-off monitoring method, system and storage medium |
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