CN107269438B - The synchronous acquisition device and method of high pressure co-rail system pressure oscillation and optical image - Google Patents
The synchronous acquisition device and method of high pressure co-rail system pressure oscillation and optical image Download PDFInfo
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- CN107269438B CN107269438B CN201710478909.1A CN201710478909A CN107269438B CN 107269438 B CN107269438 B CN 107269438B CN 201710478909 A CN201710478909 A CN 201710478909A CN 107269438 B CN107269438 B CN 107269438B
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- pressure
- fuel injector
- signal
- optical image
- personal computer
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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
- F02M65/003—Measuring variation of fuel pressure in high pressure line
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Testing Of Engines (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
The invention discloses the synchronous acquisition devices of a kind of high pressure co-rail system pressure oscillation and optical image, high pressure co-rail system includes sequentially connected fuel tank, high-pressure oil pump, high-pressure common-rail pipe and fuel injector, the device includes pressure signal collecting mechanism, optical image photographic unit and industrial personal computer, Pressure Fluctuation Signal and fuel injector enable signal when pressure signal collecting mechanism works for synchronous acquisition fuel injector, and acquisition data are reached into industrial personal computer；Optical image photographic unit sprays oily beam for shooting fuel injector, and picture is reached industrial personal computer.The synchronous collection method of a kind of pressure oscillation and optical image is also disclosed.The present invention installs high-frequency pressure sensor in fuel injector entrance and common rail pipe end, measure the Pressure Fluctuation Signal inside the common rail system, shooting is synchronized to oil beam jetted simultaneously, the synchronization comparative diagram of fuel injector enable signal, Pressure Fluctuation Signal and oily beam picture is obtained by industrial personal computer again, realizes the accurate measurement to common rail system spray feature and pressure characteristic.
Description
Technical field
The present invention relates to power and technical field of hydraulic pressure, more particularly to high pressure co-rail system pressure oscillation and optical image
Synchronous acquisition device and method.
Background technique
In order to improve the spray burning performance of internal combustion engine, pressure oscillation acquisition in common rail system and spray visualization are studied
It is the basic of common rail system pressure fluctuating in inner feature and spray feature.In order to intuitive, accurately research common rail system pressure
Fluctuation and spray feature, researchers propose the measurement method and optic visualization test hand of a variety of pressure oscillations in succession
Section.But it cannot find science and effectively synchronous collection method and equipment.
The present invention is exactly that on this basis, a kind of design for founding is rationally and effectively reliable high pressure co-rail system pressure wave
Dynamic synchronous acquisition device and method with optical image.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of high pressure co-rail system pressure oscillation is synchronous with optical image
Acquisition device can be effectively obtained corresponding pass of the high pressure co-rail system pressure fluctuating in inner feature with oily beam spray feature
System, to overcome the shortcomings of existing high pressure co-rail system pressure fluctuating in inner feature and spray feature research.
In order to solve the above technical problems, to provide a kind of high pressure co-rail system pressure oscillation synchronous with optical image by the present invention
Acquisition device, the high pressure co-rail system include sequentially connected fuel tank, high-pressure oil pump, high-pressure common-rail pipe and fuel injector, described
Synchronous acquisition device include pressure signal collecting mechanism, optical image photographic unit and with the pressure signal collecting mechanism, light
The industrial personal computer that filming image mechanism is all connected with is learned,
The pressure signal collecting mechanism, the Pressure Fluctuation Signal and described when for the work of fuel injector described in synchronous acquisition
The enable signal of fuel injector, and data transmission will be acquired to the industrial personal computer；
The optical image photographic unit, the oily beam sprayed for shooting the fuel injector, and the oily beam that shooting is obtained
Picture is sent to the industrial personal computer.
As an improvement of the present invention, the pressure signal collecting mechanism includes two high-frequency pressure sensors, electric currents
Clamp and synchronous digital capture card,
Described two high-frequency pressure sensors are separately mounted at the entry position of the fuel injector and the high-pressure common rail
At the terminal position of pipe, for acquiring the Pressure Fluctuation Signal of installed position accordingly；
The electric current clamp are used to measure the enable signal of the fuel injector；
The synchronous digital capture card is connect with described two high-frequency pressure sensors and electric current clamp, is used for synchronous acquisition
Pressure Fluctuation Signal and enable signal when the fuel injector works, and it is sent to the industrial personal computer.
It is further improved, the optical image photographic unit includes low temperature dysprosium lamp and high frequency camera shooting machine, the high frequency camera shooting
Machine realizes the high frequency shooting that oily beam is sprayed to the fuel injector, and the oily beam that shooting is obtained under the action of the low temperature dysprosium lamp
Picture is sent to the industrial personal computer.
Be further improved, the high frequency camera shooting machine filming frequency fixes, obtained oily beam be sprayed between every, picture when
Between be spaced it is consistent.
It is further improved, the high-frequency pressure sensor application Labview software collection, sample frequency 100KHz, institute
State industrial personal computer installation matlab software and Anaconda compiler.
The present invention also provides a kind of using above-mentioned high pressure co-rail system pressure oscillation and optical image synchronous acquisition device
Synchronous collection method, which comprises
(1) the fuel injector entry position and high-pressure common rail pipe end are acquired respectively by described two high-frequency pressure sensors
The Pressure Fluctuation Signal of position, meanwhile, the enable signal of the fuel injector, the pressure oscillation letter are acquired by the electric current clamp
Number and the fuel injector enable signal by the synchronous digital capture card synchronous acquisition and be transported in the industrial personal computer；
It shoots the oily beam that the fuel injector sprays by the high frequency camera shooting machine with identical frequency to be sprayed, the oily beam shot
Spraying picture is transported in the industrial personal computer by the high frequency camera shooting machine；
Wherein, the fuel injector enable signal is synchronous with the trigger signal of the high frequency camera shooting machine；
(2) the oily beam received is sprayed picture and corresponded to the Pressure Fluctuation Signal by the industrial personal computer, obtains institute
It states fuel injector enable signal, Pressure Fluctuation Signal and oily beam and is sprayed the synchronization comparative diagram of picture to get the high-pressure common rail is arrived
The corresponding relationship of internal system pressure fluctuation characteristic and oily beam spray feature.
By adopting such a design, the present invention has at least the following advantages:
The present invention is used installs high-frequency pressure sensor at fuel injector entry position and high-pressure common-rail pipe terminal position two,
The pressure oscillation characteristic inside the high pressure co-rail system is measured, while selecting suitable optic visualization test equipment to fuel injector
The oily beam of ejection synchronizes shooting, analyzes to obtain the fuel injector enable signal, Pressure Fluctuation Signal finally by industrial personal computer
And oily beam is sprayed the synchronization comparative diagram of picture, realizes to the interior spray feature of the high pressure co-rail system and the standard of pressure characteristic
Really measurement.
Detailed description of the invention
The above is merely an overview of the technical solutions of the present invention, in order to better understand the technical means of the present invention, below
In conjunction with attached drawing, the present invention is described in further detail with specific embodiment.
Fig. 1 is the structural schematic diagram of high pressure co-rail system pressure oscillation and optical image synchronous acquisition device of the present invention.
Fig. 2 is the schematic diagram of high pressure co-rail system pressure oscillation and optical image synchronous acquisition device of the present invention.
Fig. 3 is the fuel injector enable signal, Pressure Fluctuation Signal and the oily beam spray that industrial personal computer of the present invention is analyzed
The synchronization comparative diagram of mist picture.
Specific embodiment
Referring to shown in attached drawing 1, the present invention is to fill for the synchronous acquisition of high pressure co-rail system pressure oscillation and optical image
It sets, wherein the high pressure co-rail system includes sequentially connected fuel tank 1, high-pressure oil pump 2, high-pressure common-rail pipe 3 and fuel injector 4.Specifically
, which is connect by low pressure pipe with high-pressure oil pump 2, and coarse filter 5 and fine filter are disposed on the low pressure pipe
6, for being filtered to the oil for entering high-pressure oil pump；The high-pressure common-rail pipe 3 is separately connected 2 He of high-pressure oil pump by high-pressure oil pipe
Fuel injector 4, the high pressure co-rail system includes two fuel injectors 4 in the present embodiment.The fuel injector 4 is arranged in constant volume combustion bomb 12
On, which also connect with driving motor 13.
Synchronous acquisition device of the present invention includes pressure signal collecting mechanism, optical image photographic unit and believes with the pressure
The industrial personal computer 9 that number collecting mechanism, optical image photographic unit are all connected with.
The pressure signal collecting mechanism, Pressure Fluctuation Signal and the oil spout when for the work of the synchronous acquisition fuel injector 4
The enable signal of device 4, and data transmission will be acquired to the industrial personal computer 9.
The pressure signal collecting mechanism includes two high-frequency pressure sensors 7, electric current clamp and same step number in the present embodiment
Word capture card 8.
Two high-frequency pressure sensors 7 are separately mounted at the entry position of the fuel injector 4 and the high-pressure common-rail pipe 3
At terminal position, for acquiring the Pressure Fluctuation Signal of installed position accordingly.The high-frequency pressure sensor 7 in the present embodiment
Using Labview software collection Pressure Fluctuation Signal, sample frequency 100KHz；The electric current clamp are for measuring the fuel injector 4
Enable signal；The synchronous digital capture card 8 is connect with two high-frequency pressure sensors 7 and electric current clamp, is adopted for synchronizing
Collect the Pressure Fluctuation Signal and enable signal when the fuel injector 4 work, and is sent to industrial personal computer 9.
The optical image photographic unit is sprayed for shooting the oily beam of the fuel injector 4 ejection, and by the oily beam that shooting obtains
Picture is sent to industrial personal computer 9.
The optical image photographic unit includes low temperature dysprosium lamp 11 and high frequency camera shooting machine 10, the high frequency camera shooting machine in the present embodiment
10 realize the oily beam that the high frequency for spraying oily beam to the fuel injector 4 shoots, and shooting is obtained under the action of the low temperature dysprosium lamp 11
Spraying picture is sent to industrial personal computer 9.
Specifically, 10 filming frequency of high frequency camera shooting machine is fixed, obtained oily beam was sprayed between the time between every, picture
Every consistent.
The industrial personal computer 9 installation matlab software and Anaconda compiler, can acquire the pressure signal in the present embodiment
Pressure Fluctuation Signal, enable signal and the oily beam of optical image photographic unit transmission of mechanism transmission are sprayed picture and are divided
Analysis, the discrete data processing for acquiring high-frequency pressure sensor 7 make oily beam be sprayed picture and are processed at pressure signal change curve
White background black oil beam finally obtains the synchronous control that the fuel injector enable signal, Pressure Fluctuation Signal and oily beam are sprayed picture
Figure, as shown in Fig. 3, the figure reflect the corresponding relationship between Pressure Fluctuation Signal and oily beam spray-cone angle, the knot well
Fruit is efficient mixing, the atomization for studying diesel oil, and accurate measurement is sprayed, and the key problems such as fuel injector structure optimization lay good base
Plinth.
The present invention is directed to the synchronous acquisition side of above-mentioned high pressure co-rail system pressure oscillation and optical image synchronous acquisition device
Method, comprising:
(1) 3 end of 4 entry position of fuel injector and high-pressure common-rail pipe is acquired respectively by two high-frequency pressure sensors 7
The Pressure Fluctuation Signal of position, meanwhile, acquire the enable signal of the fuel injector 4 by the electric current clamp, the Pressure Fluctuation Signal and
The fuel injector enable signal is by 8 synchronous acquisition of synchronous digital capture card and is transported in the industrial personal computer 9；
It shoots the oily beam that the fuel injector 4 sprays by the high frequency camera shooting machine 10 with identical frequency to be sprayed, the oily beam shot
Spraying picture is input in the industrial personal computer 9 by the high frequency camera shooting machine 10；
Wherein, the fuel injector enable signal is synchronous with the trigger signal of the high frequency camera shooting machine, i.e. the open signal of fuel injector
It is simultaneously the open signal of high frequency camera shooting machine, then to be sprayed picture synchronous with fuel injector enable signal starting point for first oily beam.
(2) the oil beam received is sprayed picture and corresponded to the Pressure Fluctuation Signal by the industrial personal computer 9, due to pressure signal
Collecting mechanism is synchronous with the trigger signal of optical image photographic unit, can obtain the fuel injector enable signal, Pressure Fluctuation Signal
And oily beam is sprayed the synchronization comparative diagram of picture, so that the high pressure co-rail system pressure fluctuating in inner feature and oily beam spray can be obtained
The corresponding relationship of mist feature.
Referring to shown in attached drawing 2, the synchronous collection method principle of high pressure co-rail system pressure oscillation of the present invention and optical image
Are as follows: industrial personal computer gives fuel injector and high frequency camera shooting machine to send enable signal simultaneously, realizes pressure signal collecting mechanism and optical image
The synchronous averaging of photographic unit, the i.e. pressure signal of fuel injector entry position and high-pressure common-rail pipe terminal position, fuel injector are enabled
Signal and oily beam are sprayed picture synchronous acquisition, after collected data are transferred into industrial personal computer, by industrial personal computer to pressure oscillation
Signal, fuel injector enable signal and oily beam be sprayed picture analyzed to obtain the fuel injector enable signal, Pressure Fluctuation Signal with
And oily beam is sprayed the synchronization comparative diagram of picture.
The synchronous collection method of high pressure co-rail system pressure oscillation and optical image of the present invention, can test different types spray
Oily device, different fuel-injection pressures, injection pulse width, different back pressure nozzle parameter under injection macroparameter and itself press
The relationship of fluctuation optimizes fuel injector and injection pressure, high-pressure fuel supply system and Combustion system matching, promotes fuel injector
Structure design designs the system matches of high-pressure injection diesel engine, fuel injector and all has good effect.
The above described is only a preferred embodiment of the present invention, be not intended to limit the present invention in any form, this
Field technical staff makes a little simple modification, equivalent variations or modification using the technology contents of the disclosure above, all falls within this hair
In bright protection scope.
Claims (5)
1. a kind of synchronous acquisition device of high pressure co-rail system pressure oscillation and optical image, the high pressure co-rail system include according to
Fuel tank, high-pressure oil pump, high-pressure common-rail pipe and the fuel injector of secondary connection, which is characterized in that the synchronous acquisition device includes pressure
It signal acquisition mechanism, optical image photographic unit and is all connected with the pressure signal collecting mechanism, optical image photographic unit
Industrial personal computer,
The pressure signal collecting mechanism, Pressure Fluctuation Signal and the oil spout when for the work of fuel injector described in synchronous acquisition
The enable signal of device, and data transmission will be acquired to the industrial personal computer；
The optical image photographic unit, the oily beam sprayed for shooting the fuel injector, and the oily beam picture that shooting is obtained
It is sent to the industrial personal computer；
Wherein, the pressure signal collecting mechanism includes two high-frequency pressure sensors, electric current clamp and synchronous digital capture card,
Described two high-frequency pressure sensors are separately mounted at the entry position of the fuel injector and the high-pressure common-rail pipe
At terminal position, for acquiring the Pressure Fluctuation Signal of installed position accordingly；
The electric current clamp are used to measure the enable signal of the fuel injector；
The synchronous digital capture card is connect with described two high-frequency pressure sensors and electric current clamp, for described in synchronous acquisition
Pressure Fluctuation Signal and enable signal when fuel injector works, and it is sent to the industrial personal computer.
2. the synchronous acquisition device of pressure oscillation according to claim 1 and optical image, which is characterized in that the optics
Filming image mechanism includes low temperature dysprosium lamp and high frequency camera shooting machine, and the high frequency camera shooting machine is realized under the action of the low temperature dysprosium lamp
The high frequency shooting of oily beam is sprayed to the fuel injector, and the oily beam picture that shooting obtains is sent to the industrial personal computer.
3. the synchronous acquisition device of pressure oscillation according to claim 2 and optical image, which is characterized in that the high frequency
Video camera filming frequency is fixed, and the time interval that obtained oily beam is sprayed between every, picture is consistent.
4. the synchronous acquisition device of pressure oscillation according to claim 3 and optical image, which is characterized in that the high frequency
Pressure sensor application Labview software collection, sample frequency 100KHz, the industrial personal computer installation matlab software and
Anaconda compiler.
5. it is a kind of using the described in any item pressure oscillations of claim 2 to 4 and optical image synchronous acquisition device synchronize adopt
Set method, which is characterized in that the described method includes:
(1) the fuel injector entry position and high-pressure common-rail pipe terminal position are acquired respectively by described two high-frequency pressure sensors
Pressure Fluctuation Signal, meanwhile, acquire the enable signal of the fuel injector by the electric current clamp, the Pressure Fluctuation Signal and
The fuel injector enable signal is by the synchronous digital capture card synchronous acquisition and is transported in the industrial personal computer；
It shoots the oily beam that the fuel injector sprays by the high frequency camera shooting machine with identical frequency to be sprayed, the oily beam shot is spraying
Picture is transported in the industrial personal computer by the high frequency camera shooting machine；
Wherein, the fuel injector enable signal is synchronous with the trigger signal of the high frequency camera shooting machine；
(2) the oily beam received is sprayed picture and corresponded to the Pressure Fluctuation Signal by the industrial personal computer, obtains the spray
Oily device enable signal, Pressure Fluctuation Signal and oily beam are sprayed the synchronization comparative diagram of picture to get the high pressure co-rail system is arrived
The corresponding relationship of pressure fluctuating in inner feature and oily beam spray feature.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710478909.1A CN107269438B (en) | 2017-06-22 | 2017-06-22 | The synchronous acquisition device and method of high pressure co-rail system pressure oscillation and optical image |
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| CN201710478909.1A CN107269438B (en) | 2017-06-22 | 2017-06-22 | The synchronous acquisition device and method of high pressure co-rail system pressure oscillation and optical image |
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| CN107269438A CN107269438A (en) | 2017-10-20 |
| CN107269438B true CN107269438B (en) | 2019-08-20 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109915295B (en) * | 2019-04-02 | 2020-08-25 | 北京理工大学 | Method for testing spray cone angle of air inlet type oil sprayer |
| CN110594066A (en) * | 2019-09-20 | 2019-12-20 | 清华大学 | Optical test system and method for oil beam direction of multi-hole oil injector of direct injection gasoline engine |
| CN113803199B (en) * | 2021-11-19 | 2022-04-12 | 山东鑫亚格林鲍尔燃油系统有限公司 | System and method for measuring internal flow of common rail oil nozzle |
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| CN104847557A (en) * | 2015-05-27 | 2015-08-19 | 江峰 | Diesel fuel atomization characteristic testing device for high-pressure common rail system |
| CN104948369A (en) * | 2015-05-04 | 2015-09-30 | 江苏大学 | Near-field spray imaging device for common-rail injector of diesel engine |
| CN105257448A (en) * | 2015-10-06 | 2016-01-20 | 北京工业大学 | Cone valve type dynamic visualization achieving device and method for high-pressure fuel oil system of diesel engine |
| CN106404410A (en) * | 2016-12-02 | 2017-02-15 | 江苏大学 | Apparatus capable of simultaneously measuring diesel spray structure and combustion characteristic and method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| IT1321068B1 (en) * | 2000-11-14 | 2003-12-30 | Fiat Ricerche | METHOD OF DIAGNOSIS OF LOSSES IN A COMMON MANIFOLD INJECTION SYSTEM OF AN INTERNAL COMBUSTION ENGINE. |
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Patent Citations (4)
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|---|---|---|---|---|
| CN104948369A (en) * | 2015-05-04 | 2015-09-30 | 江苏大学 | Near-field spray imaging device for common-rail injector of diesel engine |
| CN104847557A (en) * | 2015-05-27 | 2015-08-19 | 江峰 | Diesel fuel atomization characteristic testing device for high-pressure common rail system |
| CN105257448A (en) * | 2015-10-06 | 2016-01-20 | 北京工业大学 | Cone valve type dynamic visualization achieving device and method for high-pressure fuel oil system of diesel engine |
| CN106404410A (en) * | 2016-12-02 | 2017-02-15 | 江苏大学 | Apparatus capable of simultaneously measuring diesel spray structure and combustion characteristic and method thereof |
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