CN104792749A - Wall guided two-stroke LPG direct injection engine PLIF visualization apparatus - Google Patents
Wall guided two-stroke LPG direct injection engine PLIF visualization apparatus Download PDFInfo
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- CN104792749A CN104792749A CN201510112114.XA CN201510112114A CN104792749A CN 104792749 A CN104792749 A CN 104792749A CN 201510112114 A CN201510112114 A CN 201510112114A CN 104792749 A CN104792749 A CN 104792749A
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Abstract
The invention relates to a laser induced fluorescence visualization apparatus wall for testing the concentration distribution and the test process of a mixed gas in a guided two-stroke LPG direct injection engine. A technical scheme adopted in the invention is mainly characterized in that a reconstructed cylinder cover is provided with a vertical air inlet channel and a high pressure swirl oil injector. The air inlet channel and the swirl oil injector are arranged at one side of the center line of a cylinder, and an air outlet is arranged above a piston bottom dead point at the other side of the center line of the cylinder. A piston reciprocates up and down once to complete entrance-press-combustion-discharge work cycle of an engine; the pit curved surface of a quartz window arranged at the top of an extended piston properly cooperates with an air inlet tumbling flow and LPG spray, and when the piston moves upward to a top dead center, LPG-air is guided to a position nearby a spark plug electrode in order to form a concentrated mixed gas easy to ignite; the wall of the extended piston is provided with a piston window corresponding to a cylinder window, and an angle between a reflector arranged in the piston window and the center line of the piston is 45DEG; and light in a combustion chamber transmits through the quartz window and is mapped to the reflector, and a high speed photographic camera is used to shoot the formation and combustion process of the mixed gas in the engine.
Description
Technical field
The present invention relates to engine visual experimental apparatus, specifically wall-guided two-stroke LPG direct fuel-injection engine laser inductive fluorescence method visualization device.
Background technology
Optical engine can utilize optic visualization diagnosis of technique to analyze state in cylinder, instructs the design of Optimizing Combustion room and combustion process.At present, lot of domestic and international internal combustion engine research institution all sets up corresponding optical engine visualization measurement platform, and the theoretical analysis of the experimental result obtained to the combustion process in engine cylinder serves necessary supporting role.
Adopt the report of the mixed Daqu of laser inductive fluorescence method research four-stroke-cycle directly jetting gasoline engine and combustion process more, the course of work that the optical engine almost seen is studied in Otto cycle engine cylinder is developed.Particularly match the research that two-stroke directly jetting gasoline engine carried out by boat engine, ship side machine etc. in recent years, but existing four-stroke-cycle directly jetting gasoline engine optical engine visual measuring device can not directly apply to the visual of the in-cylinder process of two-stroke directly jetting gasoline engine.
LPG fuel compared with gasoline, have that octane value is high, burning time the advantages such as the CO2 that generates is few, therefore, the research of two-stroke LPG direct fuel-injection engine in-cylinder process is also reported in succession.But retrieval to show in existing cylinder that method for visualizing settles endoscope mode, there is observation visual angle little, during spraying light dark, can not clearly observe the shortcomings such as Spray and combustion process.When using CFD Software Numerical Simulation two-stroke LPG direct fuel-injection engine in-cylinder process to verify the correctness of computation model select, developing one, to be applicable to the visual optical engine of two-stroke LPG direct fuel-injection engine in-cylinder process necessary.
Use for reference four-stroke-cycle directly jetting gasoline engine combustion system, " wall leading type " two-stroke LPG direct fuel-injection engine combustion system that the present invention proposes is mainly by the cooperation of spray angle, piston-shaped, air motion, at time of ignition rightly, fuel-air mixture is directed near sparking-plug electrode rightly.Thus, the laser inductive fluorescence method visualization device of the wall-guided two-stroke LPG direct fuel-injection engine course of work of the present invention's proposition is not yet seen.
List of references: Wen-Bin Wang and Yu-Yin Peng, " Spray Measurement and Visualization of Gasoline Injection for 2-Stroke Engine " .SAE Paper. 930496
Summary of the invention
The object of the invention is the deficiency overcoming existing two-stroke LPG direct fuel-injection engine in-cylinder process measuring technique, provide a kind of laser inductive fluorescence method visualization device of wall-guided two-stroke LPG direct fuel-injection engine.
Wall-guided two-stroke LPG direct fuel-injection engine laser inductive fluorescence method visualization device, comprises cylinder cover, spark plug, air intake duct, inlet valve, fuel injector, beam cut-off device, quartz ring, sheet light device, laser instrument, exhausr port, lengthens cylinder, toggle, instead drags dynamometer machine, catoptron, crankcase, lengthened piston, with the quartz window of pit, gland, piston ring, lengthened piston wall, cylinder center, cylinder form, piston form;
Described cylinder cover does not arrange exhaust duct, and only have inlet valve and longitudinal air intake duct, fuel injector, air intake duct and inlet valve are arranged in cylinder center side, and fuel injector setting angle and plane included angle, place, lengthened piston top are 30 °-60 °.The lengthening cylinder lower of exhaust ports design heart line opposite side in the cylinder, described exhausr port is opened above piston lower dead center, piston movement is to exhausr port lower edge during lower dead center lower than piston top plane, and up and down reciprocatingly once, what complete engine enters-press-quick-fried-row's working cycle to piston;
Described spark plug installation site should make sparking-plug electrode and the LPG guided close to the pit on the quartz window of top dead centre spray to restraint forward to match.
Fuel injector and plane included angle, place, lengthened piston top are 35 °-50 °.
Spark plug can be vertical be arranged on central cylindrical, also can be arranged on cylinder center side, its principle should coordinate well with the pit shape of top land; The described quartz window with pit is a kind of piston when being provided with quartz window arriving near sparking-plug electrode close to the LPG spray bundle guided through quartz window pit during top dead centre;
Quartz ring is arranged on cylinder cover and lengthens between cylinder, quartz ring with lengthen the coaxial and same inner diameter of cylinder; The described offside that lengthening cylinder is being provided with inlet valve and longitudinal air intake duct has exhausr port;
Described lengthened piston is made up of quartz window, gland, piston ring, lengthened piston wall, the quartz window face of cylinder is stepped form, gland inner cylinder face is also stepped form, gland inner cylinder face step coordinates with quartz window face of cylinder step, and quartz window is arranged on lengthened piston wall upper end by threaded engagement by gland.Lengthened piston wall is a kind of engraved structure, and lengthen cylinder side and have cylinder form, lengthened piston wall has the piston form corresponding with cylinder form, piston form inside is provided with catoptron, catoptron and piston axis angle at 45 °; Combustion chamber light therethrough quartz window is irradiated on catoptron, by mixed Daqu and the combustion process of high-speed photography camera shooting engine interior;
Lengthened piston major part is connected with the anti-dynamometer machine that drags by toggle; The described anti-power dragging dynamometer machine can survey visual engine combustion process, also can drag lengthened piston uplink and downlink by toggle is counter in visual engine research spray process;
The face of cylinder, lengthened piston lower end has piston ring groove, is provided with piston ring in piston ring groove;
According to research object setting different wave length, the laser that laser instrument sends is irradiated into quartz ring through sheet light device, is radiated at and mixes on the LPG fuel of fluorescer, fluorescer is luminous, show the region of fuel-air mixture diffusion, laser injection quartz ring, enters beam cut-off device;
Have piston ring groove in gland the latter half, be provided with piston ring in piston ring groove, when mounted lengthened piston moves to top dead centre time, the position of piston ring is lower than quartz ring;
Described piston ring comprises compression ring and drip ring;
The present invention has following beneficial effect: provide a set of visual experimental apparatus for wall-guided two-stroke direct fuel-injection engine in-cylinder process, and lengthened piston top is installed quartz window and made broader, the LASER Light Source in the observation visual field arrange more convenient.The pit curved surface being arranged on the quartz window of top land roll with air inlet flow, LPG Spray restraints and coordinates rightly, when upstroke is to during close to top dead centre, make LPG-air be directed near sparking-plug electrode, form the comparatively rich mixture being easy to light.Laser inductive fluorescence method is applied to two-stroke direct fuel-injection engine in-cylinder process during the different crank angle of shooting, combination gas distributed image in cylinder more clearly can be obtained, providing foundation for determining quantitative analysis two-stroke direct fuel-injection engine Flow field information.
Accompanying drawing explanation
Fig. 1: lengthened piston of the present invention moves to close to schematic diagram during top dead centre;
Fig. 2: lengthened piston schematic diagram of the present invention;
Fig. 3: lengthened piston of the present invention is close to close-up schematic view during top dead centre;
In figure: 1 cylinder cover, 2 spark plugs, 3 air intake ducts, 4 inlet valves, 5 fuel injectors, 6 beam cut-off devices, 7 quartz rings, 8 light devices, 9 laser instruments, 10 exhausr ports, 11 lengthen cylinder, 12 toggles,, 13 instead drag dynamometer machine, 14 catoptrons, 15 crankcases, 16 lengthened pistons, 17 with the quartz window of pit, 18 glands, 19 piston rings, 20 lengthened piston walls, 21 cylinder center, 22 cylinder forms, 23 piston forms.
Embodiment
Embodiment 1: in cylinder diameter D=67mm, effective compression ratio
ε=on the two-stroke engine of 8 ~ 8.5, improved cylinder cover 1 is provided with longitudinal air intake duct 3, eddy flow fuel injector 5(injection diameter Ф=0.31mm, LPG expulsion pressure 4MPa), air intake duct 3 and eddy flow fuel injector 5 are arranged on the right side of cylinder center 21, and exhausr port 10 is opened above the piston lower dead center on the left of heart line 21 in the cylinder.Use the anti-dynamometer machine 13 that drags to drag lengthened piston 16 by toggle 12 is counter, also transformed cam valve train, lengthened piston 16 up and down reciprocatingly once, completes once to enter-press-quick-fried-row's working cycle; Set engine speed at 1000rpm, according to the different load determined, according to signals such as crankshaft top dead center position, rotating speed and manifold air pressure, by engine fuel injection-igniting instrument control LPG time for spraying (° CA) and injection pulse width; Setting laser device 9 wavelength 266nm, open laser instrument 9 and make to inject quartz ring 7 through the laser beam of sheet light device 8, fluorescer in LPG fuel is luminous under laser action, coexist in cylinder along with LPG mono-and spread, light therethrough is irradiated to catoptron 14 with the quartz window 17 of pit, is distributed by LPG-air Mixture in cylinder during high-speed camera shooting different load operating mode.
Embodiment 2: on embodiment 1 basis, during research of combustion, according to signals such as crankshaft top dead center position, rotating speeds, sets spark plug 2 time of ignition (° CA) by engine fuel injection-igniting instrument; When denseer LPG-air Mixture roll stream in air inlet, LPG Spray restraint and top land the quartz window 17 with pit pit curved surface cooperation under be directed to spark plug 2 ate electrode time, spark plug 2 is in setting moment arcing, the LPG-air Mixture at light up plug 2 electrode gap place, form flame propagation, promotion lengthened piston 16 is descending, and the exhausr port 10 to cylinder lower is opened, waste gas is discharged.Along with opening of inlet valve 4, the fresh air through longitudinal air intake duct 3 with certain pressure flows into cylinder, and forces burnt gas to flow out from exhausr port, completes a working cycle.By with the quartz window 17 of pit and catoptron 14, spark plug 2 arcing to the communication process of combustion flame is taken the photograph speed record by high-speed camera with 24 Xu/second beats and gets off.
Test shows, the laser inductive fluorescence method visualization device that the present invention proposes clearly have taken mixture strength field in the cylinder of wall-guided two-stroke LPG direct fuel-injection engine when different load operating mode and combustion process.
Claims (7)
1. wall-guided two-stroke LPG direct fuel-injection engine laser inductive fluorescence method visualization device, comprises cylinder cover, spark plug, air intake duct, inlet valve, fuel injector, beam cut-off device, quartz ring, sheet light device, laser instrument, exhausr port, lengthens cylinder, toggle, instead drags dynamometer machine, catoptron, crankcase, lengthened piston, with the quartz window of pit, gland, piston ring, lengthened piston wall, cylinder center, cylinder form, piston form; It is characterized in that: described cylinder cover does not arrange exhaust duct, only have inlet valve and longitudinal air intake duct, fuel injector, air intake duct and inlet valve are arranged in cylinder center side, and fuel injector setting angle and plane included angle, place, lengthened piston top are 30 °-60 °; The lengthening cylinder lower of exhaust ports design heart line opposite side in the cylinder.
2. wall-guided two-stroke LPG direct fuel-injection engine laser inductive fluorescence method visualization device according to claim 1, it is characterized in that: described exhausr port is opened above piston lower dead center, piston movement to exhausr port lower edge during lower dead center lower than piston top plane.
3. wall-guided two-stroke LPG direct fuel-injection engine laser inductive fluorescence method visualization device according to claim 1, is characterized in that: the described quartz window with pit is that a kind of LPG spray bundle that piston is guiding close to pit during top dead centre on quartz window when being provided with quartz window arrives near sparking-plug electrode.
4. wall-guided two-stroke LPG direct fuel-injection engine laser inductive fluorescence method visualization device according to claim 1, is characterized in that: described spark plug installation site should make sparking-plug electrode and the LPG guided close to the pit on the quartz window of top dead centre spray to restraint forward to match.
5. wall-guided two-stroke LPG direct fuel-injection engine laser inductive fluorescence method visualization device according to claim 1, is characterized in that: what described spark plug can be vertical is arranged on cylinder cover center, also can be arranged on cylinder center side.
6. wall-guided two-stroke LPG direct fuel-injection engine laser inductive fluorescence method visualization device according to claim 1, is characterized in that: quartz ring is arranged on cylinder cover and lengthens between cylinder, quartz ring with lengthen the coaxial and same inner diameter of cylinder.
7. wall-guided two-stroke LPG direct fuel-injection engine laser inductive fluorescence method visualization device according to claim 1, is characterized in that: fuel injector and plane included angle, place, lengthened piston top are preferably 35 °-50 °.
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| CN201510112114.XA CN104792749A (en) | 2015-03-13 | 2015-03-13 | Wall guided two-stroke LPG direct injection engine PLIF visualization apparatus |
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| CN201510112114.XA CN104792749A (en) | 2015-03-13 | 2015-03-13 | Wall guided two-stroke LPG direct injection engine PLIF visualization apparatus |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10369582B2 (en) | 2015-04-30 | 2019-08-06 | Emissol Llc | System and method for spray visualization |
| JP2019190889A (en) * | 2018-04-20 | 2019-10-31 | トヨタ自動車株式会社 | Calibration method |
| CN113464308A (en) * | 2021-07-15 | 2021-10-01 | 哈尔滨工程大学 | Transparent piston head at top end of piston in optical engine and using method thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19641867A1 (en) * | 1995-10-11 | 1997-04-24 | Avl Verbrennungskraft Messtech | Opto electronic measurement system for IC engine combustion analysis |
| CN2500818Y (en) * | 2001-09-14 | 2002-07-17 | 王纯良 | Two-stroke engine of air intake through cylinder head |
| CN2516710Y (en) * | 2001-10-17 | 2002-10-16 | 曹建峰 | Piston motion type air inlet-out two-stroke engine |
| JP2007170934A (en) * | 2005-12-21 | 2007-07-05 | Toyota Central Res & Dev Lab Inc | Burnt gas behavior measurement method |
| CN201306206Y (en) * | 2008-12-02 | 2009-09-09 | 江苏大学 | Internal direct-injection natural-gas double-air-valve engine rareness layering combustion chamber structure |
| CN102806459A (en) * | 2012-08-07 | 2012-12-05 | 杭州电子科技大学 | Process for installing and debugging piston crosshead and connecting rod assembly of diesel engine |
-
2015
- 2015-03-13 CN CN201510112114.XA patent/CN104792749A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19641867A1 (en) * | 1995-10-11 | 1997-04-24 | Avl Verbrennungskraft Messtech | Opto electronic measurement system for IC engine combustion analysis |
| CN2500818Y (en) * | 2001-09-14 | 2002-07-17 | 王纯良 | Two-stroke engine of air intake through cylinder head |
| CN2516710Y (en) * | 2001-10-17 | 2002-10-16 | 曹建峰 | Piston motion type air inlet-out two-stroke engine |
| JP2007170934A (en) * | 2005-12-21 | 2007-07-05 | Toyota Central Res & Dev Lab Inc | Burnt gas behavior measurement method |
| CN201306206Y (en) * | 2008-12-02 | 2009-09-09 | 江苏大学 | Internal direct-injection natural-gas double-air-valve engine rareness layering combustion chamber structure |
| CN102806459A (en) * | 2012-08-07 | 2012-12-05 | 杭州电子科技大学 | Process for installing and debugging piston crosshead and connecting rod assembly of diesel engine |
Non-Patent Citations (1)
| Title |
|---|
| 马骁: "应用激光诱导荧光法研究直喷汽油机缸内混合气形成过程", 《中国博士学位论文全文数据库 工程科技II辑》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10369582B2 (en) | 2015-04-30 | 2019-08-06 | Emissol Llc | System and method for spray visualization |
| JP2019190889A (en) * | 2018-04-20 | 2019-10-31 | トヨタ自動車株式会社 | Calibration method |
| CN113464308A (en) * | 2021-07-15 | 2021-10-01 | 哈尔滨工程大学 | Transparent piston head at top end of piston in optical engine and using method thereof |
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Application publication date: 20150722 |
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