CN205370818U - Dimethyl ether mechanical pump formula fuel injection system performance test bench - Google Patents
Dimethyl ether mechanical pump formula fuel injection system performance test bench Download PDFInfo
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- CN205370818U CN205370818U CN201520936694.XU CN201520936694U CN205370818U CN 205370818 U CN205370818 U CN 205370818U CN 201520936694 U CN201520936694 U CN 201520936694U CN 205370818 U CN205370818 U CN 205370818U
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- dimethyl ether
- fuel
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- nozzle
- regulating valve
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Abstract
The utility model provides a dimethyl ether mechanical pump formula fuel injection system performance test bench, including dimethyl ether fuel jar, fuel outlet valve, outlet pipe, filter, electric booster pump, dimethyl ether jet pump, dimethyl ether nozzle, nozzle time liquid pipe, energy storage ware, pressure regulating valve, dimethyl ether collection tank, time liquid pipe, electronic balance, its characteristic lies in: the filter entry end links to each other through outlet pipe, fuel outlet valve and dimethyl ether fuel jar, and filter outlet end connects electric booster pump and falls into two the tunnel to the dimethyl ether jet pump, is connected to the dimethyl ether collection tank through the urea nozzle all the way, of the same kind through pressure regulating valve connect get back to dimethyl ether fuel jar in, the energy storage ware connects in parallel on the pipeline between pressure regulating valve and dimethyl ether jet pump, dimethyl ether fuel jar and dimethyl ether collection tank all are the pressure vessel jars that seals, and more than the pressure -bearing 2MPa, the injection quantity of getting the dimethyl ether is surveyed on arranging electronic balance in to the dimethyl ether collection tank through the weighting method.
Description
Technical field
The utility model relates to a kind of performance test stand, particularly a kind of dimethyl ether mechanical pump type fuel injection system performance test stand, belongs to field of internal combustion engine.
Background technology
Dimethyl ether is emerging alternative motor fuels in recent years, the similar LPG of dimethyl ether physical property, can form rapidly good gaseous mixture, shortening ignition lag with fresh air, make electromotor have good cold starting performance.The Cetane number of dimethyl ether, more than 55, higher than diesel oil, has good ignition quality, is very suitable for compression ignition engine.Research shows, dimethyl ether engine has good discharge performance, configuration mechanical pump type fuel injection system can reach the emission level that diesel engine configuration Electrocontrolled high-pressure common rail fuel system can reach, it is possible to the cost of diesel emission upgrading is greatly lowered, very with practical value.
In the R&D process of dimethyl ether engine, study the fuel system structural parameters affecting laws to emitted dose and engine combustion and discharge, it is necessary to the accurate emitted dose measuring dimethyl ether nozzle.And under dimethyl ether room temperature, it is the gas of a kind of colourless slightly abnormal smells from the patient, boiling point is-24.9 DEG C, saturated vapor pressure is 0.51MPa, and former traditional diesel engine oil Test-bed for pump is not used to the performance test of dimethyl ether spraying system, and the emitted dose how accurately measuring dimethyl ether becomes a difficult problem.There is no ready-made dimethyl ether fuel injection system performance test stand in the market.
Summary of the invention
The purpose of this utility model is in that to provide a kind of testing stand testing dimethyl ether mechanical pump type fuel injection system performance, it is possible to accurately measure the emitted dose of dimethyl ether nozzle.
This utility model is achieved through the following technical solutions, this utility model includes: a kind of dimethyl ether mechanical pump type fuel injection system performance test stand, including dimethyl ether fuel tank, fuel outlet valve, outlet, filter, electric booster pump, dimethyl ether ejector pump, dimethyl ether nozzle, nozzle liquid back pipe, accumulator, pressure-regulating valve, dimethyl ether collecting tank, liquid back pipe, electronic balance, its characteristic is in that: filter inlet end is through outlet, fuel outlet valve is connected with dimethyl ether fuel tank, filter outlet end connects electric booster pump and is divided into two-way to dimethyl ether ejector pump, one tunnel is connected to dimethyl ether collecting tank through urea nozzle, one tunnel takes back in dimethyl ether fuel tank through pressure-regulating valve；Accumulator is connected in parallel on the pipeline between pressure-regulating valve and dimethyl ether ejector pump；Dimethyl ether fuel tank and dimethyl ether collecting tank are all the pressure volume pots sealed, and more than pressure-bearing 2MPa, dimethyl ether collecting tank is placed on electronic balance, is measured the emitted dose of dimethyl ether by weight method.
Dimethyl ether fuel system is mechanical pump type spraying system, driven by belt pulley by alternating current generator, electric booster pump is by the dimethyl ether boost in pressure of entrance ejector pump to 1.5MPa, pressure-regulating valve controls the pressure in loop, accumulator is for reducing the pressure oscillation of mechanical pump low pressure chamber, nozzle liquid back pipe is manometer tube, takes back on the pipeline before pressure-regulating valve.
It is gaseous fuel that this utility model solves under dimethyl ether fuel normal temperature and pressure, a difficult problem for metering relative difficulty, and test platform structure is simple, and good reliability, measuring accuracy is high.
Accompanying drawing explanation
Accompanying drawing 1 is dimethyl ether fuel injection system performance test stand example structure figure of the present utility model.
Detailed description of the invention
Below in conjunction with drawings and Examples, the utility model will be further described.
In figure, this utility model is mainly made up of dimethyl ether fuel injection system and emitted dose test system.Dimethyl ether spraying system includes dimethyl ether fuel tank 10, fuel outlet valve 11, outlet 12, filter 13, electric booster pump 14, mechanical type spraying pump 15, dimethyl ether nozzle 16, nozzle liquid back pipe 17, accumulator 18, pressure-regulating valve 19, fuel inlet valve 20.Dimethyl ether fuel tank is positioned over the bottom of testing stand, is provided with fuel outlet valve 11, fuel inlet valve 20 above, returns liquid valve 33.Electric booster pump will enter the low pressure chamber of ejector pump after dimethyl ether boost in pressure to 1.5MPa, pressurization is present to ensure that dimethyl ether reliably liquefies in pipeline.System controls the pressure in loop by pressure-regulating valve 19, and loop is also parallel with accumulator 18, for reducing the pressure oscillation of system, improves the concordance of dimethyl ether emitted dose.Dimethyl ether ejector pump 15 is plunger displacement pump, and plunger shows to improve wearability by special handling, and dimethyl ether ejector pump front end is provided with race 40, alternating current generator 42 driven by belt pulley 41.Dimethyl ether nozzle 16 is connected in ejector pump by high-pressure oil pipe, and the dimethyl ether of nozzle return takes back before pressure-regulating valve on the pipeline of 19 by the nozzle liquid back pipe 17 of high pressure.Dimethyl ether injection test system mainly includes dimethyl ether nozzle 16, dimethyl ether collecting tank 30, electronic balance 35 forms, dimethyl ether collecting tank is the pressure volume pot sealed, more than pressure volume pot pressure-bearing 2MPa, the left side of pressurized tank is provided with liquid valve 31 by the region of bottom, is directly connected on time liquid valve 33 of dimethyl ether fuel tank by liquid back pipe 32.Electronic balance 35 is for measuring the quality of dimethyl ether, and range is 10Kg, precision 0.01g.
This utility model dimethyl ether mechanical pump type fuel injection system performance test stand is the emitted dose being tested dimethyl ether by weight method.When carrying out the test of dimethyl ether emitted dose, motor 42 starts, and drives the operating of dimethyl ether ejector pump, and dimethyl ether nozzle carries out dimethyl ether fuel injection, adjusts structural parameters and the operating parameters of dimethyl ether fuel injection system, can cause the change of dimethyl ether emitted dose accordingly.When testing the emitted dose of a certain running status dimethyl ether nozzle, first keep fuel injection system smooth operation, the initial number of degrees m1 of recorded electronic balance, then injection about 2 minutes, the difference of end of a period reading m2, m2 and the m1 of recorded electronic level is the mass flow of dimethyl ether divided by the time.Can take multiple measurements under same operating, average.In collecting tank, dimethyl ether arrives the quality set, and opens liquid valve 31, returns liquid valve 33, and dimethyl ether just can pass through liquid back pipe 32 and return in dimethyl ether fuel tank 10.
For the safety of guarantee test detection, the whole elements in described dimethyl ether fuel injection system all adopt explosion-proof component, and electric part adopts malleation measure.Testing stand is also equipped with dimethyl ether leak detection sensor, if occurring that dimethyl ether fuel is revealed, namely triggers automatic alarm system, if unmanned response after postponing certain time, then system autostop, to guarantee being perfectly safe of test.
Claims (2)
1. a dimethyl ether mechanical pump type fuel injection system performance test stand, including dimethyl ether fuel tank, fuel outlet valve, outlet, filter, electric booster pump, dimethyl ether ejector pump, dimethyl ether nozzle, nozzle liquid back pipe, accumulator, pressure-regulating valve, dimethyl ether collecting tank, liquid back pipe, electronic balance, its characteristic is in that: filter inlet end is through outlet, fuel outlet valve is connected with dimethyl ether fuel tank, filter outlet end connects electric booster pump and is divided into two-way to dimethyl ether ejector pump, one tunnel is connected to dimethyl ether collecting tank through urea nozzle, one tunnel takes back in dimethyl ether fuel tank through pressure-regulating valve；Accumulator is connected in parallel on the pipeline between pressure-regulating valve and dimethyl ether ejector pump；Dimethyl ether fuel tank and dimethyl ether collecting tank are all the pressure volume pots sealed, and more than pressure-bearing 2MPa, dimethyl ether collecting tank is placed on electronic balance, is measured the emitted dose of dimethyl ether by weight method.
2. dimethyl ether mechanical pump type fuel injection system performance test stand as claimed in claim 1, it is characterized in that: described test bed testing object dimethyl ether fuel system is mechanical pump type spraying system, driven by belt pulley by alternating current generator, nozzle liquid back pipe is manometer tube, takes back on the pipeline before pressure-regulating valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520936694.XU CN205370818U (en) | 2015-11-23 | 2015-11-23 | Dimethyl ether mechanical pump formula fuel injection system performance test bench |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520936694.XU CN205370818U (en) | 2015-11-23 | 2015-11-23 | Dimethyl ether mechanical pump formula fuel injection system performance test bench |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205370818U true CN205370818U (en) | 2016-07-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520936694.XU Expired - Fee Related CN205370818U (en) | 2015-11-23 | 2015-11-23 | Dimethyl ether mechanical pump formula fuel injection system performance test bench |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205370818U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106404988A (en) * | 2016-11-29 | 2017-02-15 | 吉林大学 | Fuel,air and diluted gas mixed gas spontaneous combustion and ignition on-fire test device |
-
2015
- 2015-11-23 CN CN201520936694.XU patent/CN205370818U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106404988A (en) * | 2016-11-29 | 2017-02-15 | 吉林大学 | Fuel,air and diluted gas mixed gas spontaneous combustion and ignition on-fire test device |
| CN106404988B (en) * | 2016-11-29 | 2018-06-01 | 吉林大学 | Fuel-air-diluent gas gaseous mixture spontaneous combustion and light test device of catching fire |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160706 Termination date: 20161123 |