CN103195633B - Full-automatic fuel-injection quantity and fuel injection law testing equipment - Google Patents
Full-automatic fuel-injection quantity and fuel injection law testing equipment Download PDFInfo
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- CN103195633B CN103195633B CN201310150309.4A CN201310150309A CN103195633B CN 103195633 B CN103195633 B CN 103195633B CN 201310150309 A CN201310150309 A CN 201310150309A CN 103195633 B CN103195633 B CN 103195633B
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Abstract
The invention provides full-automatic fuel-injection quantity and fuel injection law testing equipment in the technical scheme. The scheme comprises a testing device and a measurement and display control device, wherein the testing device comprises a seat; a test bed is arranged on the seat; an oil injector adapter is arranged on the test bed, and a tested oil injector is arranged on the oil injector adapter; a cooling cavity, a closing cavity, a cavity temperature sensor and a cavity pressure sensor communicated with the closing cavity, and a four-way small cavity communicated with the closing cavity are formed in the test bed; the four-way small cavity is connected with a safety valve and an oil discharge solenoid valve; the capacity of the four-way small cavity is controlled by a plunger head of a plunger and barrel assembly; the plunger and barrel assembly is connected with an eccentric wheel; the eccentric wheel is driven by a driving motor; an oil injector solenoid valve current sensor is arranged on the tested oil injector; a common rail tube is connected to the tested oil injector; and a common rail pressure sensor is arranged on the common rail tube. The measurement and display control device comprises a testing signal processing part and a driving signal output part connected with a computer.
Description
Technical field
What the present invention relates to is the testing apparatus of a kind of detection facility testing diesel injector performance, especially a kind of full-automatic spray oil mass and fuel injection characteristic.
Background technique
In the prior art, the technological scheme the most close with the application authorizes disclosed 03271643.5 and 200720017022.4 patents by State Intellectual Property Office, the technological scheme of above-mentioned two patents adopts volumetry or the fuel injection quantity of weight method to oil sprayer to measure, but what measure is repeatedly the mean value of fuel injection quantity, a fuel injection quantity can not be measured, more can not measure fuel injection characteristic.And CN201554584U disclosed in State Intellectual Property Office, CN201288628Y, CN102889158A, CN202851228U, CN202250538U, the technological scheme of CN201137543Y and CN101571090A seven patents, all fuel injection characteristic can be measured, but its complex structure, automatic calibration can not be carried out again, can not Lookup protocol back pressure, automatically the voltage of high pressure and low tension power supply can not be changed, automatically the compensation of common rail pressure and ambient temperature can not be carried out, and inconvenient operation, be difficult to be generalized in production scene and use in a large number, this is the deficiency existing for prior art.
Summary of the invention
Technical problem to be solved by this invention, be exactly for the deficiency existing for prior art, and the testing apparatus technological scheme of a kind of full-automatic spray oil mass and fuel injection characteristic is provided, the program adopts pressure method to test, testing apparatus is adopted to carry out oil spout test, and output test data, undertaken calculating and export result of calculation and send driving instruction by measurement display control unit collecting test data, reach the test of full automation to fuel injection quantity and fuel injection characteristic.
This programme is achieved by the following technical measures: the testing apparatus of full-automatic spray oil mass and fuel injection characteristic, include testing apparatus and measure display control unit, the feature of this programme is described testing apparatus is have a support, this support there is test bench, on the top of described test bench, oil sprayer ABAP Adapter is housed, and this oil sprayer ABAP Adapter is equipped with tested oil sprayer; In described test bench, there is a cylinder hemisphere enclosed cavity, described support is equipped with cavity temperature sensor and communicates with the sidewall of described enclosed cavity; Described support is equipped with cavity pressure sensor communicate with the bottom of described enclosed cavity; Described support is equipped with a little cavity of four-way, it is attached to cylinder hemisphere type sealed cavity, it is the sub-fraction of whole sealed cavity, a path of the little cavity of this four-way communicates with the sidewall of described enclosed cavity, another path connection safety valve of the little cavity of four-way, the Article 3 path of the little cavity of four-way connects oil drain solenoid valve, and the Article 4 path of the little cavity of described four-way connects the plug of the plunger coupled parts for changing cavity volume; Described plunger coupled parts is connected with an eccentric wheel, and this eccentric wheel is driven by the drive motor in support; The plug of plunger coupled parts under eccentric driving can in plunger bushing upper and lower sliding, to change the volume exporting the little cavity of four-way.Because the little cavity of four-way and cylinder hemisphere type sealed cavity communicate, it is attached to sealed cavity, and therefore the volume of whole sealed cavity also just changes.The cooling chamber for controlling enclosed cavity temperature is also had around described test bench inner sealing chamber; Described tested oil sprayer also has fuel injector magnetic system current sensor, and in addition, described tested oil sprayer connects common rail pipe by high-pressure oil pipe, and described common rail pipe is equipped with common rail pressure sensor; Described support also has drive motor " 0 " bit switch.Described measurement display control unit is made up of computer connecting test signal processing and drive singal output.The concrete feature of this programme also has, described testing signal process part is temperature signal in the sealed cavity that recorded by each sensor, diesel pressure signal in sealed cavity, common rail pressure signal and electromagnetic valve current signal are defeated by analogy signal processing unit, analogue signal after process is defeated by A/D converting unit by analogy signal processing unit, A/D converting unit converts analogue signal to digital signal and is defeated by data acquisition unit, and the measurement actuating signal of digital quantity is defeated by digital signal processing unit and is defeated by data acquisition unit after treatment, the data of collection are defeated by computer by USB interface by data acquisition unit.Described drive singal output is that computer exports control information to single-chip microcomputer as calculated afterwards according to the test signal inputted, after the control information that high-voltage power voltage signal, low tension power supply voltage signal, ambient temperature signal and computer that single-chip microcomputer foundation inputs are sent, single-chip microcomputer exports high-voltage power control signal to high-voltage power, export low tension power supply control signal to low tension power supply, export to fuel injector magnetic system driver element, oil drain solenoid valve driver element and drive motor driver element simultaneously; The signal that fuel injector magnetic system driver element is sent according to single-chip microcomputer sends drive singal to fuel injector magnetic system with the high-voltage power provided and low tension power supply; The signal that oil drain solenoid valve driver element is sent according to single-chip microcomputer sends drive singal to oil drain solenoid valve with the high-voltage power provided and low tension power supply; The signal that drive motor driver element is sent according to single-chip microcomputer and the low tension power supply provided send drive singal to drive motor, drive motor again by drive motor " 0 " position signal feed back to single-chip microcomputer.That described single-chip microcomputer adopts is 16 single-chip microcomputer MC9S12XEP100.What described drive motor adopted is stepper motor.
The beneficial effect of this programme can be learnt according to describing of such scheme, due to be in this scenario adopt pressure method test, testing apparatus is adopted to carry out oil spout test, and output correlation signal, with measuring display control unit collecting test data and calculating, this calculating is calculated by the pressure method computation model in computer, and send driving instruction according to result of calculation, reaches the test of full automation to fuel injection quantity and fuel injection characteristic.Therefore the diesel oil that this programme can spray in enclosed cavity according to oil sprayer makes the pressure in cavity change, and automatically measures number and the fuel injection characteristic of fuel injection quantity; Automatically can compensate the number of fuel injection quantity and the measurement of fuel injection characteristic according to the variable effect of diesel fuel temperature in enclosed cavity; Automatically can compensate the number of fuel injection quantity and the measurement of fuel injection characteristic according to the pressure variations influence of common rail pipe; Can move up and down according to the plug of plunger coupled parts, change the volume of sealed cavity, make to be formed in closure a fixing back pressure, can pressure in automatic imitation cylinder of diesel engine, and can according to plunger displacement number and velocity of displacement automatically carry out the degree of accuracy that field calibration demarcates this equipment; The pressure transducer in sealed cavity can be utilized automatically to measure the start time of oil sprayer oil spout, injection time, close moment and utilize fuel injector magnetic system current sensor automatically to measure the open time delay of solenoid valve, opening time and close time delay; The temperature in the cooling liquid control enclosed cavity in cooling chamber can be utilized; The change of corresponding fuel injection quantity and the change of fuel injection characteristic can be measured according to the change of high-voltage power voltage and low tension power supply voltage.As can be seen here, compared with prior art, have outstanding substantive distinguishing features and significant progress, its beneficial effect implemented also is apparent in the present invention.
Accompanying drawing explanation
Fig. 1 is the testing apparatus partial cross structural representation of the specific embodiment of the invention.
Fig. 2 is the measurement display control unit block diagram of the specific embodiment of the invention.
Fig. 3 is the testing signal process part block diagram of the specific embodiment of the invention.
Fig. 4 is the drive singal output block diagram of the specific embodiment of the invention.
In figure, 1 is support, and 2 is cavity pressure sensor, and 3 is test bench, 4 is cavity temperature sensor, and 5 is enclosed cavity, and 6 is oil sprayer ABAP Adapter, and 7 is tested oil sprayer, 8 is fuel injector magnetic system current sensor, and 9 is common rail pipe, and 10 is safety valve, 11 is common rail pressure sensor, and 12 is the little cavity of four-way, and 13 is oil drain solenoid valve, 14 is plug, and 15 is cooling chamber, and 16 is plunger coupled parts, 17 is drive motor " 0 " bit switch, and 18 is eccentric wheel, and 19 is drive motor.
Embodiment
For the technical characterstic of this programme can be clearly demonstrated, below by an embodiment, and in conjunction with its accompanying drawing, this programme is set forth.
The full-automatic spray oil mass of this programme and the testing apparatus of fuel injection characteristic have testing apparatus and measure display control unit, testing apparatus described in this programme is found out by Fig. 1, there is a support 1, this support 1 there is test bench 3, on the top of described test bench 3, oil sprayer ABAP Adapter 6 is housed, and this oil sprayer ABAP Adapter 6 is equipped with tested oil sprayer 7.In described test bench 3, there is a cylinder hemisphere enclosed cavity 5, described support 1 is equipped with cavity temperature sensor 4 and communicates with the sidewall of described enclosed cavity 5; Described support 1 is equipped with cavity pressure sensor 2 communicate with the bottom of described enclosed cavity 5; Described support 1 is equipped with a little cavity 12 of four-way, a path of the little cavity of this four-way 12 communicates with the sidewall of described enclosed cavity 5, another path connection safety valve 10 of the little cavity 12 of four-way, the Article 3 path of the little cavity 12 of four-way connects oil drain solenoid valve 13, and the plug 14 of the little cavity 12 of described four-way and plunger coupled parts 16 communicates the control of an actor's rendering of an operatic tune body bulk of going forward side by side.The plug 14 of described plunger coupled parts 16 is connected with an eccentric wheel 18, and this eccentric wheel 18 is driven by the drive motor 19 in support 1, and the drive motor that this embodiment adopts is stepper motor.The cooling chamber 15 for controlling enclosed cavity 5 temperature is also had around described test bench 3 inner sealing chamber 5.Described tested oil sprayer 7 also has fuel injector magnetic system current sensor 8, and in addition, described tested oil sprayer 7 connects common rail pipe 9 by high-pressure oil pipe, and described common rail pipe 9 is equipped with common rail pressure sensor 11.Described support 1 is equipped with drive motor " 0 " bit switch 17, for sending drive motor " 0 " position signal.Described measurement display control unit is computer connecting test signal processing and drive singal output.Described testing signal process part be each sensor is recorded temperature signal, diesel pressure signal, common rail pressure signal and electromagnetic valve current signal are defeated by analogy signal processing unit in sealed cavity, analogue signal after process is defeated by A/D converting unit by analogy signal processing unit, A/D converting unit converts analogue signal to digital signal and is defeated by data acquisition unit, and the measurement actuating signal of digital quantity is defeated by digital signal processing unit and is defeated by data acquisition unit after treatment, the data of collection are defeated by computer by USB interface by data acquisition unit.Described drive singal output is that computer exports control information to single-chip microcomputer as calculated afterwards according to the test signal inputted, that this concrete single-chip microcomputer described in embodiment adopts is 16 single-chip microcomputer MC9S12XEP100, single-chip microcomputer is according to the high-voltage power voltage signal of input, low tension power supply voltage signal, after the control information that ambient temperature signal and computer are sent, single-chip microcomputer exports high-voltage power control signal to high-voltage power, export low tension power supply control signal to low tension power supply, export to fuel injector magnetic system driver element simultaneously, oil drain solenoid valve driver element and drive motor driver element.The signal that fuel injector magnetic system driver element is sent according to single-chip microcomputer sends drive singal to fuel injector magnetic system with the high-voltage power provided and low tension power supply.The signal that oil drain solenoid valve driver element is sent according to single-chip microcomputer sends drive singal to oil drain solenoid valve with the high-voltage power provided and low tension power supply.The signal that drive motor driver element is sent according to single-chip microcomputer and the low tension power supply provided send drive singal to drive motor, drive motor after touching " 0 " bit switch, by drive motor " 0 " position signal feed back to single-chip microcomputer.
It is as follows that this programme computer carries out calculating used mathematical model:
For the mass conservation law of sealed cavity measuring chamber, when the inlet opening input of measuring chamber band
export with a delivery outlet and be
time
Have
In sealed cavity, the compressibility equation of liquid is
By the liquid outflow amount of enclosed cavity in-vivo measurement delivery outlet be:
By the fluid inflow of enclosed cavity in-vivo measurement entrance be:
In formula
Wherein
by the liquid influx of measuring chamber
local sound propagation velocity
by the liquid outflow amount of measuring chamber
measuring chamber volume
fluid density
delivery outlet section area
time
coefficient of discharge
sealed cavity measuring chamber pressure
Calculate
Equation by the fluid flow of nozzle:
Under steady state conditions, a reactor, the mean value of the mass flow rate of trickle
read by mass flowmenter, when the injection of single or a small amount of number of times, assuming that C2 does not change by the impact of temperature and pressure, therefore, when pressure increases in time, just can calculate the value of C2 according to equation below.
N time is sprayed, when injection frequency is f, during corresponding cycle T=1/f:
Calculate according to mass flowmenter and p (t)
value:
Calculate
just can calculate afterwards
According to master equation: when oil sprayer cuts out time, for each injection, then have
，
be rewritten into
As long as measure in real time
value and variance ratio, and n time to be sprayed, calculates each injection
after, just can calculate
;
...
value, pass through following formula:
Calculate at every turn (j=1,2 ... n) fuel injection quantity and fuel injection characteristic.
The concrete measure step of this programme is as follows:
1. tested oil sprayer 7 is loaded in oil sprayer ABAP Adapter 6, and with high-pressure oil pipe, tested oil sprayer 7 is connected with common rail pipe 9;
2. the current sensor 8 of the solenoid valve of oil sprayer 7, fuel injector magnetic system, oil drain solenoid valve 13, cavity pressure sensor 2, cavity temperature sensor 4, common rail pressure sensor 11 and drive motor 19 are electrically connected with measurement display control unit;
3. start oil supply system, will diesel oil is full of in enclosed cavity 5 and carry out pump-down process;
4. set back pressure in diesel fuel temperature in enclosed cavity 5, setting enclosed cavity 5, setting high voltage supply voltage, setting low-voltage power supply voltage, setting fuel injector magnetic system ascending current value, maintain current value, setting injection advance angle (fuel injection beginning moment), setting oil spout angle (injection time) and setting oil spout number of times;
5., after starting drive motor 19, complete the setting of back pressure;
6. controlled cooling model cavity temperature makes oil temperature in enclosed cavity 5 reach specified value;
7. measure high-voltage power voltage and the low tension power supply voltage of power supply, and ambient temperature;
8. start fuel injector magnetic system, complete and complete cavity temperature and pressure measurement of force, the measurement of common rail pressure and the measurement of fuel injector magnetic system electric current while enclosed cavity 5 oil spout once;
9. start oil extraction output solenoid valve 13, discharge the diesel oil of tested oil sprayer 7 ejection, move with the plug 14 of drive motor 19 and eccentric wheel 18 drive plunger couple 16, make the back pressure in enclosed cavity 5 return to setting value;
10., in measurement display control unit, carry out the measurement of fuel injection quantity and fuel injection characteristic and temperature, common rail pipe pressure compensation complete final calculating and carry out showing and data store.
The present invention is not limited in above-mentioned embodiment, the change that those of ordinary skill in the art make in essential scope of the present invention, remodeling, interpolation or replacement, also should belong to protection scope of the present invention.
Claims (6)
1. the testing apparatus of a full-automatic spray oil mass and fuel injection characteristic, include testing apparatus and measure display control unit, it is characterized in that: described testing apparatus has a support, this support there is test bench, on the top of described test bench, oil sprayer ABAP Adapter is housed, and this oil sprayer ABAP Adapter is equipped with tested oil sprayer; In described test bench, there is a cylinder hemisphere enclosed cavity, described support is equipped with cavity temperature sensor and communicates with the sidewall of described enclosed cavity; Described support is equipped with cavity pressure sensor communicate with the bottom of described enclosed cavity; Described support is equipped with a little cavity of four-way, a path of the little cavity of this four-way communicates with the sidewall of described enclosed cavity, another path connection safety valve of the little cavity of four-way, the Article 3 path of the little cavity of four-way connects oil drain solenoid valve, and the Article 4 path of the little cavity of described four-way connects the plug of the plunger coupled parts for changing cavity volume; Described plunger coupled parts is connected with an eccentric wheel, and this eccentric wheel is driven by the drive motor in support; The cooling chamber for controlling enclosed cavity temperature is also had around described test bench inner sealing chamber; Described tested oil sprayer also has fuel injector magnetic system current sensor, and in addition, described tested oil sprayer connects common rail pipe by high-pressure oil pipe, and described common rail pipe is equipped with common rail pressure sensor; Support is also equipped with drive motor " 0 " bit switch.
2. testing apparatus according to claim 1, is characterized in that: described measurement display control unit is computer connecting test signal processing and drive singal output.
3. testing apparatus according to claim 2, it is characterized in that: described testing signal process part is the analog amount temperature signal recorded by each sensor, diesel pressure signal, common rail pressure signal and electromagnetic valve current signal are defeated by analogy signal processing unit, analogue signal after process is defeated by A/D converting unit by analogy signal processing unit, A/D converting unit converts analogue signal to digital signal and is defeated by data acquisition unit, and the measurement actuating signal of digital quantity is defeated by digital signal processing unit and is defeated by data acquisition unit after treatment, the data of collection are defeated by computer by USB interface by data acquisition unit.
4. testing apparatus according to claim 2, it is characterized in that: described drive singal output is that computer exports control information to single-chip microcomputer as calculated afterwards according to the test signal inputted, after the control information that high-voltage power voltage signal, low tension power supply voltage signal, ambient temperature signal and computer that single-chip microcomputer foundation inputs are sent, single-chip microcomputer exports high-voltage power control signal to high-voltage power, export low tension power supply control signal to low tension power supply, export to fuel injector magnetic system driver element, oil drain solenoid valve driver element and drive motor driver element simultaneously; The signal that fuel injector magnetic system driver element is sent according to single-chip microcomputer sends drive singal to fuel injector magnetic system with the high-voltage power provided and low tension power supply; The signal that oil drain solenoid valve driver element is sent according to single-chip microcomputer sends drive singal to oil drain solenoid valve with the high-voltage power provided and low tension power supply; The signal that drive motor driver element is sent according to single-chip microcomputer and the low tension power supply provided send drive singal to drive motor, drive motor again by drive motor " 0 " position signal feed back to single-chip microcomputer.
5. testing apparatus according to claim 4, is characterized in that: that described single-chip microcomputer adopts is 16 single-chip microcomputer MC9S12XEP100.
6. testing apparatus according to claim 1, is characterized in that: what described drive motor adopted is stepper motor.
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|---|---|---|---|
| CN201310150309.4A CN103195633B (en) | 2013-04-26 | 2013-04-26 | Full-automatic fuel-injection quantity and fuel injection law testing equipment |
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|---|---|---|---|
| CN201310150309.4A CN103195633B (en) | 2013-04-26 | 2013-04-26 | Full-automatic fuel-injection quantity and fuel injection law testing equipment |
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| CN103195633A CN103195633A (en) | 2013-07-10 |
| CN103195633B true CN103195633B (en) | 2015-07-22 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104532071A (en) * | 2014-12-23 | 2015-04-22 | 合肥派成铝业有限公司 | Hardly-yellowing aluminum alloy for doors and windows |
| CN104949825B (en) * | 2015-06-03 | 2017-12-08 | 机科发展科技股份有限公司 | A kind of common-rail injector automatic high pressure oil filling mechanism |
| CN113153601B (en) * | 2021-05-08 | 2022-06-28 | 重庆红江机械有限责任公司 | Stabilizing device convenient for measuring oil injection quantity of oil injector |
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| CN101004161A (en) * | 2006-12-18 | 2007-07-25 | 中国船舶重工集团公司第七一一研究所 | Electric controlled tester and testing method for preformance of high-pressure oil pump in use for coaxial tracks of engines |
| CN101571090A (en) * | 2009-06-04 | 2009-11-04 | 北京航空航天大学 | Fuel injection rule measuring device of diesel engine and measuring method thereof |
| CN201554584U (en) * | 2009-11-17 | 2010-08-18 | 武汉钢铁(集团)公司 | Diesel injector fuel injection rate curve measurement control device |
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| CN102889158A (en) * | 2012-10-12 | 2013-01-23 | 机科发展科技股份有限公司 | Single injection quantity detector of common rail oil injector |
| CN103063418A (en) * | 2012-09-26 | 2013-04-24 | 北京工业大学 | Characteristic measurement device for oil mass measurement unit |
| CN203230513U (en) * | 2013-04-26 | 2013-10-09 | 阴山 | Full-automatic oil injection quantity and law test equipment |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3929363B2 (en) * | 2002-06-25 | 2007-06-13 | マツダ株式会社 | Inspection equipment for engines |
-
2013
- 2013-04-26 CN CN201310150309.4A patent/CN103195633B/en not_active Expired - Fee Related
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0861979A2 (en) * | 1997-03-01 | 1998-09-02 | LUCAS INDUSTRIES public limited company | Injector test apparatus |
| US6567755B1 (en) * | 1999-09-08 | 2003-05-20 | Assembly Technology & Test Limited | Metering equipment |
| CN101004161A (en) * | 2006-12-18 | 2007-07-25 | 中国船舶重工集团公司第七一一研究所 | Electric controlled tester and testing method for preformance of high-pressure oil pump in use for coaxial tracks of engines |
| CN101571090A (en) * | 2009-06-04 | 2009-11-04 | 北京航空航天大学 | Fuel injection rule measuring device of diesel engine and measuring method thereof |
| CN201554584U (en) * | 2009-11-17 | 2010-08-18 | 武汉钢铁(集团)公司 | Diesel injector fuel injection rate curve measurement control device |
| CN101881246A (en) * | 2010-06-02 | 2010-11-10 | 天津大学 | Measuring device and method of response time of fuel injector |
| CN103063418A (en) * | 2012-09-26 | 2013-04-24 | 北京工业大学 | Characteristic measurement device for oil mass measurement unit |
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