CN104061102B - Engine fuel supercriticality obtains device and nanospray experiment system - Google Patents
Engine fuel supercriticality obtains device and nanospray experiment system Download PDFInfo
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- CN104061102B CN104061102B CN201410265199.0A CN201410265199A CN104061102B CN 104061102 B CN104061102 B CN 104061102B CN 201410265199 A CN201410265199 A CN 201410265199A CN 104061102 B CN104061102 B CN 104061102B
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Abstract
The present invention relates to engine fuel injection technology, be specifically related to engine fuel supercriticality and obtain device and nanospray experiment system.Engine fuel supercriticality obtains device, including: pressure-resistant pipeline (1), two end face arranges fuel inlet (5), pressure relief opening (6)；The jet (9) that is arranged on pressure-resistant pipeline outer peripheral face, pressure transducer (7), the first temperature sensor (8)；The zone of heating (2) being enclosed in outside pressure-resistant pipeline；The heat-insulation layer (3) being enclosed in outside zone of heating；The protective cover (4) being enclosed in outside heat-insulation layer.The diffusion coefficient of supercritical fluid one or two order of magnitude bigger than general liquid, is greatly promoted the mixing of fuel and air, advantageously reduces the overrich region of charge, minimizing Particulate Emission in cylinder.
Description
Technical field:
The present invention relates to engine fuel injection technology, be specifically related to engine fuel supercriticality and obtain device and nanospray experiment system.
Background technology:
Supercritical fluid defines: i.e. temperature, pressure is above the fluid of this material critical point, and fluid has the character of gas and liquid in this state concurrently.
At present, restricting vehicle engine combustion efficiency improves one of key factor with pollutant emission reduction is fuel gasification in cylinder.Spray into the liquid fuel in cylinder cannot gasify in time and mix in time with air, be that electromotor in-cylinder combustion speed is slow, efficiency of combustion is low and produce a large amount of soot, CO and unburned hydrocarbon main cause.Supercritical fluid has the character of gas phase and liquid phase concurrently, and viscosity, density, diffusion coefficient, viscosity and diffusion coefficient are close to gas, and density and solvability are close to liquid.The vaporization process that supercritical phase does not suffers from the two-phase coexistent of drop is changed to, without gasification latent heat by liquid phase.
For the most advantages of supercritical fluid, the device and the nanospray experiment system that produce supercriticality fuel are the most extremely important.
Summary of the invention:
It is an object of the invention to provide a kind of engine fuel supercriticality and obtain device and nanospray experiment system.
Technical scheme is as follows:
Engine fuel supercriticality obtains device, including: pressure-resistant pipeline 1, two end face arranges fuel inlet 5, pressure relief opening 6；The jet 9 that is arranged on pressure-resistant pipeline outer peripheral face, pressure transducer the 7, first temperature sensor 8；The zone of heating 2 being enclosed in outside pressure-resistant pipeline；The heat-insulation layer 3 being enclosed in outside zone of heating；The protective cover 4 being enclosed in outside heat-insulation layer.
Engine fuel supercriticality nanospray experiment system including said apparatus, this system also includes: be connected on fuel the first cooler 23 before fuel inlet, it is connected on the second cooler 14 after pressure relief opening, and the constant volume combustion bomb 21 being connected with jet.
As further preferred scheme, this system also includes: be connected on second temperature sensor the 10, first valve the 11, second valve 12 before the first cooler, plunger displacement pump 13, fuel tank 22；It is connected on the three-temperature sensor 15 after the second cooler, automatically controlled nozzle 16, the ECU being connected with automatically controlled nozzle, the 3rd valve 19, filter 18, relief valve 17, centrifugal pump 20.
Above-mentioned zone of heating is ceramic heater.
As a example by gasoline, when fuel sprays into pressure-resistant pipeline from fuel inlet, along with the rising of temperature, the pressure in pressure-resistant pipeline can improve, when reaching more than 320 degree Celsius, and more than pressure 5Mpa, just reach supercriticality.
As a example by directly jetting gasoline engine, the present invention is relative to the advantage of prior art:
(1) density of supercritical fluid is close to liquid gasoline, and the density of supercritical fluid is close to liquid gasoline, and viscosity only has the 1/12 to 1/4 of general liquid, diffusion coefficient one or two order of magnitude bigger than general liquid, and do not suffer from the process of the breakup of drop evaporation in liquid spray, above-mentioned factor is greatly promoted the mixing of fuel and air, advantageously reduces the overrich region of charge in cylinder, reduces Particulate Emission.
(2) in the embodiment recommended, by the ceramic heater of power adjustable, the first temperature sensor, the combined monitoring of pressure transducer and control, can accurately, stably fuel is maintained at the supercriticality of High Temperature High Pressure, and engine fuel spraying Experiments of Optics can be applied to pointedly.
(3) in the embodiment recommended, safety and Cost Problems are fully taken into account, arrange relief valve, cooler and filter in systems, improve safety, reduce the material requirements to pipeline Yu valve, it is to avoid because of the danger of fuel the most issuable clogged with deposits pipeline.
Accompanying drawing illustrates:
Fig. 1 is supercriticality schematic diagram.
Fig. 2 is that inventive engine fuel supercriticality obtains apparatus structure schematic diagram；In figure, 1 represents pressure-resistant pipeline, and 2 represent zone of heating, and 3 represent heat-insulation layer, and 4 represent protective cover, and 5 represent fuel inlet, and 6 represent pressure relief opening, 7 representative pressure sensors, and 8 represent the first temperature sensor, and 9 represent jet.
Fig. 3 represents engine fuel supercriticality nanospray experiment system schematic in embodiment；In figure, 7 representative pressure sensors, 8 represent the first temperature sensor, 10 represent the second temperature sensor, and 11 represent the first valve, and 12 represent the second valve, 13 represent plunger displacement pump, and 14 represent the second cooler, and 15 represent three-temperature sensor, 16 represent automatically controlled nozzle, and 17 represent relief valve, and 18 represent filter, 19 represent the 3rd valve, and 20 represent centrifugal pump, and 21 represent constant volume combustion bomb, 22 represent fuel tank, and 23 represent the first cooler.
Detailed description of the invention
With reference to Fig. 2,3, the detailed description of the invention of the present invention is described with Fuel Petroleum.
Engine fuel supercriticality obtains device, including: fuel tank 22；Pressure-resistant pipeline 1, two end face arranges fuel inlet 5, pressure relief opening 6；The jet 9 that is arranged on pressure-resistant pipeline outer peripheral face, pressure transducer the 7, first temperature sensor 8；The zone of heating 2 being enclosed in outside pressure-resistant pipeline；The heat-insulation layer 3 being enclosed in outside zone of heating；The protective cover 4 being enclosed in outside heat-insulation layer.
Including the engine fuel supercriticality nanospray experiment system of said apparatus, also include: be connected on fuel the first cooler 23 before fuel inlet, be connected on the second cooler 14 after pressure mouth, and the constant volume combustion bomb 21 being connected with jet；
It is connected on second temperature sensor the 10, first valve the 11, second valve 12 before the first cooler, plunger displacement pump 13, fuel tank 22；It is connected on the three-temperature sensor 15 after the second cooler, automatically controlled nozzle 16, the ECU being connected with automatically controlled nozzle, the 3rd valve 19, filter 18, relief valve 17, centrifugal pump 20.
Above-mentioned zone of heating is the ceramic heater of power adjustable.
Work process is as follows:
Start constant flow high-pressure plunger pump, adjust the first valve and the aperture of the second valve, open the 3rd valve thus reach the system pressure needed.
Closing the first valve, the second valve, the 3rd valve, form confined space, ceramic heater works, and heats up to system；Meanwhile, pressure transducer, the first temperature sensor, the second temperature sensor, three-temperature sensor monitoring pressure-resistant pipeline and the state parameter of whole oil circuit.
Along with the rising of pressure, temperature in pressure-resistant pipeline, according to pressure transducer, the reading of the first temperature sensor, automatically controlled nozzle is opened under control of the ecu；In view of the control of automatically controlled nozzle can be as accurate as once opening the persistent period in millisecond magnitude, each oil spout is in milligram magnitude, thus reaches and accurately keep experimental temperature and the pressure needed in pressure-resistant pipeline.
Finally, supercritical fuel sprays into constant volume combustion bomb by jet.
First cooler, the second cooler ensure that all valve workings of pipeline, below 200 DEG C, use constant flow high-pressure plunger pump, adjust the first valve and the aperture of the second valve, thus reach the output pressure wanted.The oil of process heating, it may happen that chemical reaction, can produce precipitation, need filter to clear up, nozzle the oil sprayed does not has pressure to be allowed to flow back to fuel tank, needs a centrifugal pump to provide power.
Claims (6)
1. engine fuel supercriticality obtains device, it is characterised in that including:
Pressure-resistant pipeline (1), two end face arranges fuel inlet (5), pressure relief opening (6)；
The jet (9) that is arranged on pressure-resistant pipeline outer peripheral face, pressure transducer (7), the first temperature sensor (8)；
The zone of heating (2) being enclosed in outside pressure-resistant pipeline；
The heat-insulation layer (3) being enclosed in outside zone of heating；
The protective cover (4) being enclosed in outside heat-insulation layer.
Engine fuel supercriticality the most according to claim 1 obtains device, it is characterised in that described zone of heating is the ceramic heater of power adjustable.
3. include the engine fuel supercriticality nanospray experiment system of device described in claim 1, it is characterised in that also include:
It is connected on the fuel the first cooler (23) before fuel inlet, is connected on the second cooler (14) after pressure relief opening, and the constant volume combustion bomb (21) being connected with jet.
Engine fuel supercriticality nanospray experiment system the most according to claim 3, it is characterised in that also include:
It is connected on the second temperature sensor (10) before the first cooler, the first valve (11), the second valve (12), plunger displacement pump (13), fuel tank (22).
Engine fuel supercriticality nanospray experiment system the most according to claim 4, it is characterised in that also include:
It is connected on the three-temperature sensor (15) after the second cooler, automatically controlled nozzle (16), the ECU being connected with automatically controlled nozzle, the 3rd valve (19), filter (18), relief valve (17), centrifugal pump (20).
Engine fuel supercriticality nanospray experiment system the most according to claim 3, it is characterised in that described zone of heating is the ceramic heater of power adjustable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410265199.0A CN104061102B (en) | 2014-06-13 | 2014-06-13 | Engine fuel supercriticality obtains device and nanospray experiment system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410265199.0A CN104061102B (en) | 2014-06-13 | 2014-06-13 | Engine fuel supercriticality obtains device and nanospray experiment system |
Publications (2)
| Publication Number | Publication Date |
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| CN104061102A CN104061102A (en) | 2014-09-24 |
| CN104061102B true CN104061102B (en) | 2016-09-14 |
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| CN201410265199.0A Expired - Fee Related CN104061102B (en) | 2014-06-13 | 2014-06-13 | Engine fuel supercriticality obtains device and nanospray experiment system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107806386B (en) * | 2017-12-05 | 2024-03-12 | 北京理工大学 | Supercritical fuel injection system |
| CN108226161B (en) * | 2018-01-15 | 2019-12-17 | 天津大学 | System and method for removing speckle phenomenon in laser shadow method test |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US7488357B2 (en) * | 2004-11-24 | 2009-02-10 | Syracuse University | Supercritical diesel fuel composition, combustion process and fuel system |
| CN101353999B (en) * | 2007-04-09 | 2011-08-10 | 李岳 | Automobile electrothermic jet burner |
| CN101413933B (en) * | 2007-10-17 | 2010-06-23 | 中国科学院工程热物理研究所 | Flow, heat transfer and heat-absorbing reaction integrative measuring apparatus of supercritical fluid |
| CN101560416A (en) * | 2009-05-07 | 2009-10-21 | 浙江林学院 | Method for preparing fuel oil by liquefying biomass and using supercritical methanol as medium |
| CN203978689U (en) * | 2014-06-13 | 2014-12-03 | 天津大学 | Motor fuel supercritical state obtains device and spraying experimental system |
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