CN101846008B - Optical generator - Google Patents
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- CN101846008B CN101846008B CN2010101399684A CN201010139968A CN101846008B CN 101846008 B CN101846008 B CN 101846008B CN 2010101399684 A CN2010101399684 A CN 2010101399684A CN 201010139968 A CN201010139968 A CN 201010139968A CN 101846008 B CN101846008 B CN 101846008B
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Abstract
The invention relates to an optical generator for providing different combustion modes during combusting different fuels in different combustion chambers. The optical generator is characterized in that an elongated cylinder (302), an elongated cylinder sleeve (303), an elongated piston (203) and a circular gasket (101) are additionally mounted between an original cylinder (305) and a cylinder cover (301), a valve timing mechanism (308) is assembled on the cylinder cover (301), a circular aluminum alloy briquetting (201) and a transparent combustion chamber window (202) are mounted at the upper part of the elongated piston (203), a reflector (304) at 45 degrees with the axis of the piston is obliquely arranged at the lower part of the elongated piston (203), an angle scaler (5) is arranged on a generator crankshaft (307), an air cylinder pressure quartz sensor (7) is assembled on the cylinder cover (301), and a valve lift-range inductor sensor (9) is mounted on the valve timing mechanism (308).
Description
Technical field
The present invention relates to automobile or dynamic power machine motor, particularly relate to a kind of optical engine.
Background technique
Exhausted day by day at petroleum resources in recent years, under the strict day by day situation of automobile emission regulation, the urgency that reduces the discharging of automobile and improve automobile fuel ecomomy seems especially outstanding.Because the fuel economy of petrol engine than diesel engine difference, then seems more urgent so reduce the oil consumption of petrol engine.
The controlled involuntary ignition (CAI) of up-to-date appearance in other words homogeneous-charge compression-ignition catch fire (HCCI) compare with traditional combustion mode have extremely low NOx, CO discharging and improve the advantage and the potentiality of fuel economy; Receive international internal-combustion engine circle and extensively paying attention to, be considered to one of technology of gasoline engine of following very attractive.The CAI/HCCI combustion mode can be accomplished in several ways in theory.But the result of study by external early stage shows that utilizing EGR gas is on motor car engine, to realize CAI/HCCI combustion mode effective method and approach the most.The phase place through full variable valve actuating mechanism and the change of lift can realize the quality adjustment of exhaust gas inside cylinder recirculation (EGR) and intake and exhaust port EGR.
The result of research never ipsilateral has disclosed between temperature distribution and the combustion process of EGR gas and has had tangible coherence, possibly realize the effective control with combustion process of catching fire of CAI pattern through being distributed with of control EGR.Do but how various EGR gas strategy waste gas distribute? It is the most favourable to control CAI combustion process how to distribute? Does the principal element that influences the EGR gas distribution have those? How to control the distribution of EGR gas? These problems also do not have system in depth to study.
In order to study these contents; People must accurately learn situation such as cylinder temperature field, concentration field and component; Thereby understand under different EGR strategies new gas charge and residual gas concrete distribution situation in cylinder, understand details mobile in the engine cylinder, combustion process.
Combustion diagnosis is measured and is analyzed combustion process exactly.But, generally be difficult to obtain gas in the jar motion and combustion case because engine chamber is a good container of sealing that is used for the fuel combustion blast.For the measurement of temperature, pressure, speed and component etc., past people is generally used physical probe or test instruments such as thermocouple, piezoelectric transducer, active and static pressure pipe and gas analyzer.Can accurately measure in-cylinder pressure with piezoeletric quartz sensor, and then utilize various analytical calculation programs to obtain some essential informations in the cylinder indirectly, as obtaining temperature average in the cylinder with the crank angle Changing Pattern with the rate of heat release computer program; Parameters such as the flow velocity that utilizes various physical probe (like thermocouple) to get involved to obtain certain point or cross section in the firing chamber, temperature, but it has disturbed normal flow field and work in the cylinder after all, limited to the tolerance of high temperature, lack enough room and time resolution.
The backwardness of combustion diagnosis technology causes the physical image, chemical reaction mechanism in various engine combustions flow field etc. also unclear so far, becomes the further deep obstacle of mechanism of combustion research.And mechanism of combustion research is not enough, directly has influence on the development of motor of new generation, and for example the hysteresis of CAI/HCCI mechanism of combustion research is exactly one of main difficulty of CAI/HCCI reseach of engine.
Abroad just optical diagnostic method especially laser spectrum diagnostic techniques is applied to the parameter measurement of gas phase in the engine cylinder or gas-liquid two-phase flow since the eighties initial stage in last century.
The essence that laser spectrum is measured is to be exciting light source with laser; Experience the measurand internal energy distribution electromagnetic field relevant through spectrometer and Intensified Charge Coupled Device (ICCD) and obtain metrical infromation, have characteristics such as high sensitivity, non-contact and high-spatial and temporal resolution with energy level transition.In the abominable Combustion Flow Field of measurement environment, it can carry out the measurement of many reference amounts such as temperature, concentration and component.
The optical diagnostic method of domestic and international application on motor mainly contains at present: Michaelis (Mie), Rayleigh (Rayleigh) and spontaneous Raman scattering (Raman), coherent anti-stokes raman scattering (CARS), planar laser induced fluorescence (PLIF), induced with laser incandescence (LII), chemoluminescence method and optics tracer method etc.
Because PLIF technology signal intensity is higher, be widely used in the motor, it can be used to obtain concentration and temperature two dimension (2D) image qualitatively, has outstanding space resolution capability.Mie, Rayleigh scattering are used for the mensuration of concentration field in the engine cylinder under many circumstances; CARS can measure temperature and CO simultaneously
2Concentration, measurement effect is good, has carried out temperature in the motor flow field, pressure, the isoparametric Measurement and analysis of flow velocity abroad; LII is used for the research of diesel exhaust particulates emission; The luminous relation of surveying time of ignition and phase place of chemoluminescence method during mainly through fuel combustion; The optics tracer method is mainly used in the imaging research in flow field.Spontaneous Raman scattering spectral technique based on laser can be to main matter in the engine cylinder (CO, CO
2, O
2, N
2, H
2O and fuel) carry out real-time, synchronous, multi-metering, and good time space resolution is arranged, can also be through calculating the Changing Pattern of cylinder temperature, concentration and pressure.
At present, there are many laboratories and research institute (center) to have optical engine both at home and abroad.Famous has: the engine research center and the General Motors Corporation of the inferior National Laboratory in the Holy Land of the U.S., University of Wisconsin, and combustion physics research institute of Lund, Sweden university, mechanical engineering portion of Britain BRUNEL UNIVERSITY, internal-combustion engine Combustion National Key Laboratory of Chinese University Of Tianjin etc.
Usually, the firing chamber of motor is surrounded by inboard wall of cylinder cover, cylinder sleeve and piston head.Therefore, there are three kinds of methods to obtain optical path to the firing chamber.Use one or several optical path to combine different optical technologies can be applied to the different research fields of different types motor again.
1. pass the optical path of cylinder head
Generally have side-located gas-gate, promptly on cylinder cap, lack air valve system, allow to install optical path for two-cycle engine, can be from top observation firing chamber.1969, Scott realized the optical path on the cylinder cap on one two stroke single-cylinder diesel engine, had obtained the visual of fuel injection completely and burning; Last century the eighties, Princeton university has developed a spark ignition (SI) single cylinder two stroke optical engines, up to now, has accomplished a large amount of Experiments of Optics.
Early stage four-stroke SI motor has side-located gas-gate, especially L type cylinder cap motor.1938, it was that transparent window has been realized the visual of burning that the Withrow of G.M. (General Motors) company and Rassweiler replace part or all of cylinder cap; 1979; Johnston is in U.S. Sandia (Holy Land is inferior) National Laboratory; On cylinder cap and piston, use transparent window to provide the firing chamber complete visual zone, they have used a CW LR laser raman system in spark ignition (SI) motor, to measure air fuel ratio and studied the stratified mixture combustion process.
Modern engine has overhead valvetrain assembly, has seriously limited the space of realizing optical path from top.1991, people such as Spicher on an IDI diesel engine particular design have two air valve cylinder caps of optical path, observed spontaneous combustion and knocking combustion in premixed combustion chamber and bathtub shape main combustion chamber with High Speed Photography and schlieren method respectively.
Mechanical engineering portion of Britain BRUNEL UNIVERSITY has realized observing the firing chamber in motor side and end face through transforming on an IDI diesel engine, goes to study the formation of spraying, atomizing, burning and the soot of diesel oil by means of striograph, delustring and duochrome method.
In large-scale relatively DI (straight spray) diesel engine, can one of two outlet valves be substituted with optical window.1991, this method of humans such as Dec was observed spray plume and burning thereof completely.
In a word, pass this method of cylinder head optical path, mainly be applicable to side-located gas-gate, two-cycle engine.Need complicated transformation for modern four stroke engine, and influenced original flowing and combustion regime.
2. pass the optical path of sidewall
The transparent ring window is installed between cylinder cap and cylinder body or, is made visual from the motor side with part and the virgin metal cylinder sleeve (no-cooling-water cover) of transparent cylinder sleeve replacement completely.This method be specially adapted to can space-time resolution based on optical diagnostic method in the cylinder of laser.1988, Bates realized the manufacturing of optical engine with the sapphire cylinder sleeve.The engine research center of University of Wisconsin, combustion physics research institute of Lund, Sweden university all utilize this method to carry out optical diagnostics and research in a large amount of cylinders.
But this method requires good center line will be arranged between the piston and the transparent body and lubricate, generally will use expensive sapphire as the transparent body.Because transparent body surface is a curve form, cause the image of observation to have twisted phenomena in addition, need complicated correction.
3. pass the optical path of piston
1961, the Bowditch of U.S. G.M. company at first developed the flat-top transparent body has been installed on the piston head, and adopted lengthened piston and underlying 45 degree reflecting mirrors, realized observing from piston base the situation of firing chamber.This is very practical for the modern engine of having used Overhead valve, and it can keep former combustion-chamber shape basically.
At present, domestic and international most of optical engines have all adopted this optical path, and combine other optical path to realize using the further investigation of various physicochemical change aspect in the engine cylinder of different optical diagnostic techniques.
The scattering of light that human Nd:YAG lasers such as S.Pischinger in 2002 excite is applied to the numerical calculation and the EGR strategy study of CAI/HCCI motor; People such as Zhaohua had provided based on 532nm Nd:YAG and under the part operating mode, have measured main component and air fuel ratio in the CAI motor in 2006.
But, at present domestic in engine cylinder the technical deficiency on the optical diagnostics be:
1. at present also do not have to change different engine chambers, and can use the method for laser diagnostics to remove to study the optical engine of in-cylinder combustion process.
2. also there is not at present such optical engine; The combination of the out of phase that it can be through full variable valve actuating mechanism and the strategy of lift can reach the reasonable adjusting of EGR amount; With various optical instrument analyses and research; Reach and control the regularity of distribution of initial point and cylinder temperature, speed, concentration and the pressure field etc. of seeking space-time resolution of catching fire, thereby realize the CAI/HCCI burning and expand its working zone.
Summary of the invention
In order to realize burning and the control of motor under the CAI/HCCI pattern; The method of two kinds of optical path mentioning in the comprehensive background technique; And overcome the deficiency of existing technology; The purpose of this invention is to provide a kind of optical engine, with provide motor use different fuel with at the different combustion manners under the different firing chambers: become gradation parameter with the engine crankshaft corner Changing Pattern like homogeneous charging compressing ignition (HCCI) or controlled cylinder temperature field, concentration field, pressure field and the component of lighting automatically under (CAI) situation.And the calculating analog result of result that will obtain and three-dimensional artificial software Star-CD compares and verifies, and then discloses CAI motor EGR gas based on exhaust gas recirculation (EGR) and distribute and influencing rule and influencing the factor of EGR gas distribution what CAI combustion process and noxious emission generated.Be the CAI combustion process optimization control based on exhaust gas recirculation, the expansion of operation area provides theoretical foundation and technological reserve.
Above-mentioned purpose of the present invention realizes that through following technological scheme accompanying drawings is following:
A kind of optical engine; Mainly form by former cylinder body 305, lengthening cylinder body 302, cylinder cap 301, former piston 306, lengthened piston 203, bent axle 307 and port timing mechanism 308; Lengthening cylinder body 302, lengthening cylinder sleeve 303, lengthened piston 203 and ring pad 101 between former cylinder body (305) and cylinder cap 301, have been installed additional; On cylinder cap 301, be equipped with port timing mechanism 308, the bottom of lengthened piston 203 is connected with the top positioning and fixing of former piston 306, and lengthening cylinder body 302 is connected with former cylinder body 305 positioning and fixing; Aluminum annular-shaped alloy briquetting 201 and firing chamber transparent window 202 are installed on lengthened piston 203 tops; Have rectangular hole 501 in lengthened piston 203 and lengthening both sides, cylinder body 302 bottom on equidirectional, its effect is when lengthened piston moves up and down, and does not interfere with the reflector 304 that is installed on the former cylinder body (305); Having cross section in lengthened piston 203 bottoms along axis is rectangular hole 501; The hole is wider than reflector 304 width; Reflector 304 become with piston axis 45 ° tilting in the hole; Reflector 304 mirror holder lower ends are fixed on the former cylinder body 305, and lengthening has cooling jacket in the cylinder body 302, and the recirculated cooling water 16 through controllable temperature provides hot water in cyclic water jacket; Be equipped with fuel injector 14 on the intake duct; Engine crankshaft 307 is provided with footmark device 5; Be equipped with cylinder pressure quartz transducer 7 on the cylinder cap 301; Be equipped with valve lift inductive pickup 9 in the port timing mechanism 308.
Described ring pad 101 outer rims are symmetrically installed with four laser-light transparent windows 102 that can get into laser beam on its mutually perpendicular direction, its effect is on two mutually perpendicular directions, laser to be injected in the cylinder, working medium in the deexcitation cylinder.
The aluminum annular-shaped alloy briquetting 201 on said lengthened piston 203 tops is for can change and aluminum annular-shaped alloy briquetting 201 that have different combustion-chamber shapes; It has constituted firing chamber big as far as possible and that have definite shape together with following firing chamber transparent window 202; The below of transparent window 202 is observed with combustion process the working medium in the firing chamber is mobile through various optical meanss from the firing chamber; On the edge of radially two relative positions of aluminum annular-shaped alloy briquetting 201, have slit; Make under certain optical engine crank angle; Laser beam passes slit from the laser-light transparent window 102 of a side and enters into the firing chamber, and from the slit of opposite side and laser-light transparent window 102, penetrates.
Technique effect of the present invention is: the result and the three-dimensional artificial software Star-CD result of calculation that obtain through above-mentioned test method compare checking, and then disclose CAI motor EGR gas distribution the influencing rule and influencing the factor that EGR gas distributes CAI combustion process and noxious emission generation based on exhaust gas recirculation (EGR).Be the CAI combustion process optimization control based on exhaust gas recirculation, the expansion of operation area provides theoretical foundation and technological reserve.
Description of drawings
Fig. 1 is ring pad and laser-light transparent window schematic representation;
Fig. 2 is the assemblying body schematic representation of aluminum annular-shaped alloy briquetting, firing chamber transparent window and lengthened piston;
Fig. 3 is overall structure figure of the present invention;
Fig. 4 is an overall applicability structured flowchart of the present invention.
Fig. 5 is the lengthened piston schematic representation
Among the figure: 101. ring pads, 102. laser-light transparent windows, 201. aluminum annular-shaped alloy briquettings, 202. firing chamber transparent windows; 203. lengthened piston, 301. cylinder caps, 302. lengthening cylinder bodies, 303. lengthening cylinder sleeves; 304. reflector, 305. former cylinder bodies, 306. former pistons, 307. bent axles; 308. port timing mechanism, 309. spark plugs, 501. rectangular holes;
1. computer and data capture and control unit, 2. laser, 3. enhanced charge-coupled device (ICCD), 4. spectrometer; 5. footmark device, 6. pulse signal puocessing module, 7. cylinder pressure quartz transducer, 8. charge amplifier; 9. valve lift inductive pickup, 10. carrier amplifier, 11. temperature transducers, 12. temperature signal regulation modules; 13. computer and high-speed data acquistion system, 14. fuel injectors, 15. electric spray control systems, 16. recirculated cooling water casees; 17. coupling, 18. power measurers, 19. control cabinets;
Embodiment
Illustrated embodiment further specifies particular content of the present invention and embodiment thereof with reference to the accompanying drawings.
A kind of optical engine of the present invention is provided with a ring pad between lengthening cylinder body and cylinder cap, on the radially mutually perpendicular position of ring pad, four laser-light transparent windows that can get into laser beam are installed; Be provided with big as far as possible on lengthened piston top and have the definite shape firing chamber, and the firing chamber transparent window that can be used for observing working medium motion and combustion process arranged; Lengthened piston has rectangular hole with the lengthening inferior part of the cylinder block, is placed with the reflector that becomes 45 ° of inclination angles with piston axis that is installed on the former cylinder body in the hole; Lengthening has cooling jacket in the cylinder body, and the recirculated cooling water case through controllable temperature provides hot water in cooling jacket; Cylinder cap is provided with no cam drive variable phase distribution device; Be provided with fuel injector in the intake duct; Engine crankshaft is provided with the footmark device; Be provided with the cylinder pressure quartz transducer of real-time collection in-cylinder pressure in the cylinder cap; No cam drive variable phase distribution device is provided with the valve lift inductive pickup of real-time collection valve lift.The present invention is mainly used in the making of optical engine.
Said optical engine is the optical engine that disposes the electric injection device of intake duct fuel injection.
Said ring pad adopts steel, and four transparent laser-light transparent windows that can get into laser beam are installed on the radially mutually perpendicular position.
Said transparent window adopting quartz glass material.
Said lengthened piston adopts aluminum alloy material; Its topmost part is equipped with and can constitutes aluminum annular-shaped alloy briquetting certain combustion-chamber shape and that can get into laser beam; And the firing chamber transparent window, both sides, its underpart have can place the rectangular hole that becomes the reflector at 45 ° of inclination angles with piston axis.
Said lengthening cylinder body adopts cast iron materials, and by constituting cooling jacket between cylinder sleeve and the lengthening cylinder body, the both sides, bottom have can place the rectangular hole that piston axis becomes 45 ° of inclination angle reflectors.
Said no cam drive variable valve timing mechanism is to be made up of hydraulic control component, can regulate the lift and the phase place of inlet and exhaust valve arbitrarily.
Said footmark device is a photoelectric encoder.
Through laser-light transparent window, firing chamber transparent window and the reflector that the present invention is provided with, can obtain the laboratory data that becomes gradation parameter to change with component based on the optical engine cylinder temperature field under the CAI/HCCI combustion manner of exhaust gas recirculation, concentration field, pressure field with engine crankshaft corner.
The ring pad:
Aluminum annular-shaped alloy briquetting, firing chamber transparent window and lengthened piston assemblying body:
Lengthened piston 203 is installed on the basis of former piston 306.Lengthened piston 203 is processed by the alloy aluminium bar, is guaranteeing that it has on certain intensity based, alleviates its weight as far as possible during design.Lengthened piston 203 tops are equipped with aluminum annular-shaped alloy briquetting 201, reinstate fixing bolt with lengthened piston 203 1 the firing chamber transparent window 202 at lengthened piston 203 middle parts is compressed.Aluminum annular-shaped alloy briquetting 201 ring inboards and firing chamber transparent window 202 tops have constituted the firing chamber, and the inboard difformity of aluminum annular-shaped alloy briquetting 201 rings can constitute different combustion-chamber shapes.In order to let laser can pass this firing chamber, have slit in aluminum annular-shaped alloy briquetting 201 relative both sides; When the motor real work; The motion in cylinder sleeve 303 together of lengthened piston 203, aluminum annular-shaped alloy briquetting 201 and firing chamber transparent window 202; Become the reflector 304 at 45 ° of inclination angles interference-free in order to make to be installed on the former cylinder body 305 with piston axis; Both sides in lengthened piston 203 bottoms have rectangular hole 501, make when lengthened piston 203 moves up and down, just to bump less than reflector 304.From the optical signal in the firing chamber at first firing chamber transparent window 202 be reflected out through reflector 304 again, by the optical device check and analysis.In assembly process, pay special attention to problems such as stress, sealing between firing chamber transparent window 202 and aluminum annular-shaped alloy briquetting 201 and the lengthened piston 203.Because the laser beam wavelength that laser sends is between 260nm～1064nm, different fuel is through after exciting, and its wavelength range can be about 200nm～2000nm.Therefore, silica glass material is selected ultraviolet optics silica glass JGS2 for use, and it is the optical quartz glass with the hydrogen-oxygen fusing, is the excellent material that sees through 200～2500nm wave band.
The lengthening cylinder body:
Lengthening cylinder body 302 bottoms are connected with former cylinder body 305 bolts and locate, and top is filled up 101 and is connected with cylinder cap 301 usefulness bolts with encircling.Between lengthening cylinder body 302 and the lengthened piston 203 is cylinder sleeve 303, and lengthening cylinder body 302 surrounds cooling jacket with cylinder sleeve 303.Lengthening cylinder body 302 is connected with recirculated cooling water case 16 water pipes; Recirculated cooling water case 16 can be controlled engine cooling water temperature; Earlier recirculated cooling water is heated to uniform temperature before the engine running; Heat in the help firing chamber, it can be started fast, in order to avoid too much running causes the pollution of optical glass and the damage of elongated portion.The segment distance owing to extended between cylinder cap 301 and the former cylinder body 305, the cylinder body 302 that therefore extends should have certain intensity, has designed stiffening rib, and lengthening cylinder body 302 can be because of torsional moment generation phenomenon of rupture when guaranteeing engine running.
Reflector:
On former cylinder body 305, be mounted with a support that becomes 45 ° of inclination angles with piston axis, reflector 304 is installed on the support.Reflector 304 is the aluminizer holophote, and it can strengthen the reflectivity of scattered light.
The transformation of former motor:
Owing on former piston 306, increased lengthened piston 203; Therefore increased weight; Caused the imbalance of bent axle, former crankshaft counter balance has been calculated and transforms, made that bent axle has good balance under the situation of the weight that increases in order to address this problem.Connection between lengthening cylinder body 302 and the former cylinder body 305 should guarantee good location, avoids abnormal collision between lengthened piston 203 and the cylinder sleeve 303.Laser-light transparent window 102 can damage under the pressure of explosion operating conditions of long period with firing chamber transparent window 202; The oil droplet of combustion gas and lubricant oil can pollute the distortion that silica glass causes optical signalling; Therefore control the oil spout moment of fuel injection device 14 arbitrarily by electric spray control system 15, thus control engine operational cycle number of times.The several engine cycles work of may command, several cycles is not worked, and to scavenge, reduces its pollution to silica glass as far as possible.
The footmark device:
The optical engine specific embodiment:
The circulating water that at first will extend in the cylinder sleeve 303 with recirculated cooling water case 16 is heated to 80 ± 5 ℃; Start optical engine afterwards; Load by dynamometer system 17,18,19 control optical engines; By port timing mechanism 308 adjustment port timing and lifts, by electric spray control system 15 and fuel injector 14 timing injected fuel in intake duct.When optical engine being adjusted to the operating mode (under the CAI combustion mode) that needs research; By computer and data capture and control unit 1 control laser 2 emission laser; The optical signal of using spectrometer 4 and enhanced charge-coupled device (ICCD) 3 to gather in optical engine in-cylinder combustion and the flow process then; The cylinder pressure signal that obtains by cylinder pressure quartz transducer 7 and charge amplifier 8 under simultaneous computer and high-speed data acquistion system 13 acquisition and recordings; The inlet and exhaust valve lift and the displacement signal that obtain by valve lift inductive pickup 9 and carrier amplifier 10, the coolant water temperature, oil temperature and the delivery temperature that obtain by temperature transducer 11 and temperature signal regulation module 12.Through footmark device 5 and pulse signal puocessing module 6, make all measurements all be based on the optical engine crank angle, and separate each real engine work cycle by the top dead center signaling zone.For fear of damaging and polluting laser-light transparent window 102 and firing chamber transparent window 202, the optical engine operating mode is controlled in the slow-speed of revolution (1200r/min and following), discontinuous operation, and continuous operation time generally is less than 10 minutes.
The present invention is in being transformed into optical engine with the virgin metal single-cylinder engine, and is applicable to the occasion that multicylinder engine is transformed into a cylinder or multi-cylinder optical engine.
Claims (2)
1. optical engine; Mainly form by former cylinder body (305), lengthening cylinder body (302), cylinder cap (301), former piston (306), lengthened piston (203), bent axle (307) and port timing mechanism (308); Lengthening cylinder body (302), lengthening cylinder sleeve (303) and lengthened piston (203) between former cylinder body (305) and cylinder cap (301), have been installed additional; On cylinder cap (301), be equipped with port timing mechanism (308); The bottom of lengthened piston (203) is connected with the top positioning and fixing of former piston (306), and lengthening cylinder body (302) is connected with former cylinder body (305) positioning and fixing, has rectangular hole (501) in lengthened piston (203) and cylinder body (302) both sides, bottom of extending on equidirectional; Its effect is when lengthened piston moves up and down, and does not interfere with the reflector (304) that is installed on the former cylinder body (305); Having cross section in lengthened piston (203) bottom along axis is rectangular hole (501), and the hole is wider than reflector (304) width, and reflector (304) mirror holder lower end is fixed on the former cylinder body (305), is equipped with fuel injector (14) on the intake duct; Engine crankshaft (307) is provided with footmark device (5); Be equipped with cylinder pressure quartz transducer (7) on the cylinder cap (301); Be equipped with valve lift inductive pickup (9) in the port timing mechanism (308); It is characterized in that:
Said port timing mechanism (308) is no cam drive variable phase port timing mechanism; On said lengthened piston (203) top aluminum annular-shaped alloy briquetting (201) and firing chamber transparent window (202) are installed; Said reflector (304) adopts the holophote of aluminizer; To strengthen the reflectivity of scattered light; Reflector (304) become with piston axis 45 ° tilting in said rectangular hole (501), in lengthening cylinder body (302) cooling jacket is arranged, the recirculated cooling water (16) through controllable temperature provides hot water in cyclic water jacket; Ring pad (101) is installed between lengthening cylinder body (302) and cylinder cap (301); Ring pad (101) outer rim is symmetrically installed with four laser-light transparent windows (102) that can get into laser beam on its mutually perpendicular direction; Its effect is on two mutually perpendicular directions, laser to be injected in the cylinder; Working medium in the deexcitation cylinder, sealing between ring pad (101) and cylinder cap (301) and the lengthening cylinder body (302).
2. a kind of optical engine according to claim 1; It is characterized in that; The aluminum annular-shaped alloy briquetting (201) on said lengthened piston (203) top is for can change and aluminum annular-shaped alloy briquetting that have different combustion-chamber shapes (201); It has constituted firing chamber big as far as possible and that have definite shape together with following firing chamber transparent window (202); Through various optical meanss the working medium in the firing chamber is flowed in the below of the transparent window from the firing chamber (202) and combustion process is observed, and on the edge of radially two relative positions of aluminum annular-shaped alloy briquetting (201), has slit, makes under certain optical engine crank angle; Laser beam passes slit from the laser-light transparent window (102) of a side and enters into the firing chamber, and from the slit of opposite side and laser-light transparent window (102), penetrates.
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| CN2010101399684A CN101846008B (en) | 2010-04-07 | 2010-04-07 | Optical generator |
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| CN2010101399684A CN101846008B (en) | 2010-04-07 | 2010-04-07 | Optical generator |
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| CN103541813B (en) * | 2013-11-15 | 2016-03-02 | 吉林大学 | A kind of visual direct-injection gasoline engine |
| CN104481768B (en) * | 2014-10-14 | 2017-12-22 | 江苏大学 | A kind of tracer spraying system for being used to visualize engine measuring |
| CN105257421A (en) * | 2015-10-10 | 2016-01-20 | 天津大学 | Visual independent engine cylinder liner |
| CN105547708A (en) * | 2016-01-29 | 2016-05-04 | 天津大学 | Reflector assembly for optical engine laser test image acquisition |
| CN106168540B (en) * | 2016-08-09 | 2018-08-17 | 天津大学 | Can flexible modulation flowing-pressure wave-burning interaction visualization combustion chamber |
| CN110632036A (en) * | 2019-08-22 | 2019-12-31 | 江苏大学 | Device and method for jointly measuring soot precursor and soot based on optical engine |
| CN114856850A (en) * | 2022-05-06 | 2022-08-05 | 福建力宝动力机械有限公司 | Engine cylinder cover convenient to installation |
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| FR2812392B1 (en) * | 2000-07-28 | 2002-12-13 | Inst Francais Du Petrole | OPTICAL MOTOR FOR TESTING, PARTICULARLY FOR MEASUREMENTS ON COMBUSTION PARAMETERS |
| CN1916380A (en) * | 2006-09-06 | 2007-02-21 | 天津内燃机研究所 | Optical engine |
| CN200946525Y (en) * | 2006-09-11 | 2007-09-12 | 天津内燃机研究所 | High speed small cylinder diameter optical engine device |
| DE102006058285B4 (en) * | 2006-12-08 | 2009-04-16 | Technische Universität München | Pressure chamber and method for their optical monitoring |
| CN101608575B (en) * | 2009-06-30 | 2012-03-07 | 奇瑞汽车股份有限公司 | Optical engine |
| CN101865028B (en) * | 2009-12-07 | 2012-07-11 | 奇瑞汽车股份有限公司 | Optical engine |
| CN101737191B (en) * | 2009-12-23 | 2011-11-16 | 奇瑞汽车股份有限公司 | Optical engine and lengthened piston thereof |
| CN201687573U (en) * | 2010-04-07 | 2010-12-29 | 吉林大学 | Optical engine |
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| CN101846008A (en) | 2010-09-29 |
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