CN107035593A - The method of testing and device of a kind of fuel injector injection pressure - Google Patents
The method of testing and device of a kind of fuel injector injection pressure Download PDFInfo
- Publication number
- CN107035593A CN107035593A CN201710308812.6A CN201710308812A CN107035593A CN 107035593 A CN107035593 A CN 107035593A CN 201710308812 A CN201710308812 A CN 201710308812A CN 107035593 A CN107035593 A CN 107035593A
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- China
- Prior art keywords
- fuel injector
- fuel
- measured
- injector
- injection
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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
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
The invention provides a kind of injection pressure test device of fuel injector, including fuel injector to be measured (1), injector plate (2), pressing device (3), fuel injection characteristic tester (4), fuel injector (1) to be measured is placed on the connecting hole of fuel injection characteristic tester (4), and fuel injector to be measured (1) is pressed on fuel injection characteristic tester (4) by injector plate (2) with pressing device (3).By measuring the injection rate curve of fuel injector to be measured (1), the injection pressure curve of fuel injector can be obtained using spray orifice flow rate calculation formula, more accurately injection pressure curve can be obtained.
Description
Technical field
The invention belongs to the technical field of measurement and test of fuel injector injection pressure, more particularly, to a kind of fuel injector injection pressure
Method of testing and device.
Background technology
With increasingly strict, the combination property requirement continuous improvement to engine fuel injector of Abgasgesetz.It is existing a large amount of
Research shows：The injection pressure of fuel injector is had a major impact, it is necessary to carry out further investigation to it to the performance of engine with discharge.
However, the injector nozzle matching parts of engine fuel injector compact conformation, especially fuel injector, diameter is smaller so that the reality before spray orifice
Injection pressure can not direct measurement, add analysis difficulty.
To obtain more accurately injection pressure, conventional method is：The perforate at injector nozzle matching parts oil holding slot, is filled using sealing
Put and seal the perforate of pressure sensor and atomizer oil holding slot, fuel injector oil holding slot is obtained using pressure sensor direct measurement
Pressure curve.This method has some not enough：1st, it is strict to seal request, increase nonstandard processing cost；2nd, atomizer is punched
After install pressure sensor, fuel injector can not be reused, and further increase testing cost；What the 3rd, the test was measured is to contain oil
The pressure curve of groove, and the injection pressure curve before the pressure curve of oil holding slot and spray orifice also has certain difference, this species diversity
Increased as engine load increases.
The content of the invention
In view of this, the present invention is directed to propose the method for testing and device of a kind of fuel injector injection pressure, are treated by measurement
The injection rate curve of fuel injector is surveyed, spray orifice flow rate calculation formula is reapplied, the injection pressure before spray orifice can be extrapolated.
To reach above-mentioned purpose, the technical proposal of the invention is realized in this way：
A kind of method of testing of fuel injector injection pressure, is comprised the following steps：
Fuel injector to be measured is measured by fuel injection characteristic tester, the injection rate curve of fuel injector to be measured is obtained；
Again by injection rate curve negotiating spray orifice flow rate calculation formula, the injection pressure before the spray orifice of fuel injector to be measured is obtained
Curve；Wherein spray orifice flow rate calculation formula is as follows:
In formula：μ is nozzle discharge coefficient, and A is total area of nozzle hole, and ρ is fuel density, and Δ p is before fuel injector spray orifice to be measured
In the difference of pressure and oil spout environmental pressure, formula, μ, A, ρ, oil spout environmental pressure are easier to measurement and obtained.
A kind of test device of fuel injector injection pressure, including injector plate, pressing device and fuel injection characteristic tester,
When in the connecting hole that the nozzle end of fuel injector to be measured is placed on fuel injection characteristic tester, injector plate is stuck in fuel injector to be measured
Portion, is connected injector plate, the other end is fixedly connected with fuel injection characteristic tester, by oil spout to be measured by pressing device one end
Device is pressed on fuel injection characteristic tester.
Further, the pressing device is the screwed connecting rod in two ends, and one end screws in fuel injection characteristic tester, separately
One end passes through the through hole of injector plate and fastened by nut.
Relative to prior art, method and device of the present invention has the advantage that：
The inventive method and device do not carry out any processing to fuel injector to be measured, and after test terminates, fuel injector can normally make
With.
While testing injection rate, using the result of the test of the injection rate, the meter of injection pressure curve is done directly
Calculate, simplify injection rate test and to be carried out respectively with pressure test, so as to simplify the workload of experimental test.By calculating
The pressure curve before spray orifice is directly obtained, the pressure curve with respect to oil holding slot is more accurate.
Brief description of the drawings
The accompanying drawing for constituting the part of the present invention is used for providing a further understanding of the present invention, schematic reality of the invention
Apply example and its illustrate to be used to explain the present invention, do not constitute inappropriate limitation of the present invention.In the accompanying drawings：
Fig. 1 is the structural representation of the test device of fuel injector injection pressure described in the embodiment of the present invention.
Description of reference numerals：
Fuel injector (1) to be measured, injector plate (2), pressing device (3), fuel injection characteristic tester (4).
Embodiment
It should be noted that in the case where not conflicting, the embodiment in the present invention and the feature in embodiment can phases
Mutually combination.
Describe the present invention in detail below with reference to the accompanying drawings and in conjunction with the embodiments.
The test device of fuel injector injection pressure of the embodiment of the present invention, as shown in figure 1, including injector plate 2, compressing dress
3 and fuel injection characteristic tester 4 are put, when the nozzle end of fuel injector 1 to be measured is placed in the connecting hole of fuel injection characteristic tester 4, are sprayed
Oily device pressing plate 2 is stuck in the middle part of fuel injector to be measured 1, is connected injector plate 2, the other end by multiple one end of pressing device 3
Fuel injection characteristic tester 4 is fixedly connected with, fuel injector 1 to be measured is pressed on fuel injection characteristic tester 4.
The pressing device 2 is the screwed connecting rod in two ends, and one end screws in fuel injection characteristic tester 4, and the other end is worn
Cross the through hole of injector plate 2 and fastened by nut
The fuel injection characteristic tester 4 selects the EM- II of French EFS companies or the HAD equipment of MOEHWALD companies of Germany.
During test, the test of the injection rate curve of fuel injector 1 to be measured is completed by fuel injection characteristic tester 4, is recycled
Spray orifice flow rate calculation formula, can calculate the injection pressure curve for obtaining fuel injector 1 to be measured.
By the injector plate 2 and pressing device 3 of replacing different structure or size, it is possible to achieve different fuel injector oil spouts
The test of rate curve, so as to obtain the injection pressure curve of different fuel injectors.
Test does not have any influence to fuel injector 1 to be measured, and after the completion of test, fuel injector 1 to be measured remains to normally use.This dress
Put available for any one in positive injector, electric-controlled type fuel injector.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
God is with principle, and any modification, equivalent substitution and improvements made etc. should be included in the scope of the protection.
Claims (3)
1. a kind of method of testing of fuel injector injection pressure, it is characterised in that comprise the following steps：
Fuel injector (1) to be measured is measured by fuel injection characteristic tester (4), the injection rate curve of fuel injector to be measured (1) is obtained；
Again by injection rate curve negotiating spray orifice flow rate calculation formula, the injection pressure before the spray orifice of fuel injector to be measured (1) is obtained
Curve, wherein spray orifice flow rate calculation formula are as follows:
In formula：μ is nozzle discharge coefficient, and A is total area of nozzle hole, and ρ is fuel density, and Δ p is pressure before fuel injector spray orifice to be measured
With the difference of oil spout environmental pressure, in formula, μ, A, ρ, oil spout environmental pressure are easier to measurement and obtained.
2. a kind of test device of fuel injector injection pressure, it is characterised in that：Including injector plate (2), pressing device (3) and
Fuel injection characteristic tester (4), when the nozzle end of fuel injector to be measured (1) is placed in the connecting hole of fuel injection characteristic tester (4), sprays
Oily device pressing plate (2) is stuck in the middle part of fuel injector to be measured (1), is connected injector plate (2) by pressing device (3) one end, separately
One end is fixedly connected with fuel injection characteristic tester (4), and fuel injector to be measured (1) is pressed on fuel injection characteristic tester (4).
3. the test device of fuel injector injection pressure according to claim 2, it is characterised in that：The pressing device (3)
For the screwed connecting rod in two ends, one end screws in fuel injection characteristic tester (4), and the other end leads to through injector plate (2)
Hole is simultaneously fastened by nut.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710308812.6A CN107035593A (en) | 2017-05-04 | 2017-05-04 | The method of testing and device of a kind of fuel injector injection pressure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710308812.6A CN107035593A (en) | 2017-05-04 | 2017-05-04 | The method of testing and device of a kind of fuel injector injection pressure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107035593A true CN107035593A (en) | 2017-08-11 |
Family
ID=59538765
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710308812.6A Pending CN107035593A (en) | 2017-05-04 | 2017-05-04 | The method of testing and device of a kind of fuel injector injection pressure |
Country Status (1)
| Country | Link |
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| CN (1) | CN107035593A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2567637A (en) * | 2017-10-17 | 2019-04-24 | Delphi Tech Ip Ltd | Injector test machine |
| CN110848063A (en) * | 2019-10-14 | 2020-02-28 | 中国北方发动机研究所(天津) | Method for inspecting performance of fuel injector matching complete machine |
| CN112943501A (en) * | 2021-04-28 | 2021-06-11 | 一汽解放汽车有限公司 | Flow testing device and method for oil nozzle matching parts |
Citations (6)
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| JPH08121289A (en) * | 1994-10-28 | 1996-05-14 | Ono Sokki Co Ltd | Injection rate measuring device |
| CN202250538U (en) * | 2011-09-23 | 2012-05-30 | 同济大学 | Multiple-time oil injection rule test and control system of common-rail fuel-supplying injector for |
| JP2012163073A (en) * | 2011-02-08 | 2012-08-30 | Denso Corp | Fuel injection condition analyzing device |
| CN104405553A (en) * | 2014-11-19 | 2015-03-11 | 江苏大学 | Measuring device for oil injection rule of each hole of oil injection nozzle of diesel engine |
| JP2015098822A (en) * | 2013-11-19 | 2015-05-28 | 株式会社デンソー | Injection characteristic acquisition device and injection characteristic acquisition method |
| US20150346180A1 (en) * | 2014-05-29 | 2015-12-03 | Denso Corporation | Fuel property judgment device and method of judging fuel property |
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2017
- 2017-05-04 CN CN201710308812.6A patent/CN107035593A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08121289A (en) * | 1994-10-28 | 1996-05-14 | Ono Sokki Co Ltd | Injection rate measuring device |
| JP2012163073A (en) * | 2011-02-08 | 2012-08-30 | Denso Corp | Fuel injection condition analyzing device |
| CN202250538U (en) * | 2011-09-23 | 2012-05-30 | 同济大学 | Multiple-time oil injection rule test and control system of common-rail fuel-supplying injector for |
| JP2015098822A (en) * | 2013-11-19 | 2015-05-28 | 株式会社デンソー | Injection characteristic acquisition device and injection characteristic acquisition method |
| US20150346180A1 (en) * | 2014-05-29 | 2015-12-03 | Denso Corporation | Fuel property judgment device and method of judging fuel property |
| CN104405553A (en) * | 2014-11-19 | 2015-03-11 | 江苏大学 | Measuring device for oil injection rule of each hole of oil injection nozzle of diesel engine |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2567637A (en) * | 2017-10-17 | 2019-04-24 | Delphi Tech Ip Ltd | Injector test machine |
| GB2567637B (en) * | 2017-10-17 | 2020-05-27 | Delphi Tech Ip Ltd | Injector test machine |
| US11339757B2 (en) | 2017-10-17 | 2022-05-24 | Delphi Technologies Ip Limited | Injector test machine |
| CN110848063A (en) * | 2019-10-14 | 2020-02-28 | 中国北方发动机研究所(天津) | Method for inspecting performance of fuel injector matching complete machine |
| CN112943501A (en) * | 2021-04-28 | 2021-06-11 | 一汽解放汽车有限公司 | Flow testing device and method for oil nozzle matching parts |
| CN112943501B (en) * | 2021-04-28 | 2022-03-08 | 一汽解放汽车有限公司 | Flow testing device and method for oil nozzle matching parts |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170811 |
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