CN102062037B - Variable-focus engine laser ignition device - Google Patents
Variable-focus engine laser ignition device Download PDFInfo
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- CN102062037B CN102062037B CN2011100097268A CN201110009726A CN102062037B CN 102062037 B CN102062037 B CN 102062037B CN 2011100097268 A CN2011100097268 A CN 2011100097268A CN 201110009726 A CN201110009726 A CN 201110009726A CN 102062037 B CN102062037 B CN 102062037B
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Abstract
The invention discloses a variable-focus engine laser ignition device, wherein the specific structure is that an optical fiber is fixed to a cylinder cover through a laser igniter shell; a primary lens fixing seat and a secondary lens fixing seat are arranged in the laser igniter shell; and a primary lens and a secondary lens are horizontally embedded in the lens fixing seats respectively. The lower end of the secondary lens fixing seat is provided with a protection mirror; a laser beam is emitted into a cylinder through the optical fiber, the primary lens, the secondary lens and the protection mirror and converged on a focus point. Drive mechanisms of manners are arranged above or below the primary lens fixing seat so that the primary lens generates displacement. According to the invention, the relative position of the laser focus in the cylinder can be adjusted according to the requirements of different work conditions. The laser igniter has a small volume about 1/10 that of a spark plug, and one end of the laser igniter connected into an air cylinder only consists of an optical fiber and a lens. Compared with the spark plug, the laser igniter has the characteristics of small energy consumption and high reliability. The laser igniter is in a non-contact ignition manner, thereby avoiding the problem of carbon deposition close to the spark plug electrode.
Description
Technical field
The invention belongs to internal-combustion engine technology, be specifically related to a kind of ignition mechanism that is used on the spark-ignition engine.
Technical background
The burning form of motor can be divided into Spark ignition type and compression-ignited, and spark plug is one of key component of spark-ignition engine, yet along with the appearance of direct spray petrol engine in cylinder (GDI) and the extensive use of laser technique, the plug ignition technology is about to termination.Because gasoline in-cylinder direct injection technology has more excellent cold starting characteristic and fuel economy, and this technology makes other new technologies such as air intake pressurized, stratified mixture combustion control more easily and realize.
Direct spray petrol engine in cylinder is taked different combustion modes according to different operating modes, comprising: homogeneous charge combustion mode and stratified mixture combustion pattern.Stratified mixture combustion is latter stage fuel oil to be sprayed in cylinder compresses, makes fuel oil in cylinder, form bigger concentration gradient and distributes, and be the key that embodies the direct injection technology fuel economy.The mode that fuel oil directly sprays can be divided into the wall guiding, air-flow guides and spray-guided three kinds, at present the spray-guided dominant position that accounts for.Spray-guided is to utilize the high pressure fuel injector system that fuel oil is sprayed in the cylinder, relies on oil sprayer to make fuel-oil atmozation, evaporation and and air mixing.Layering (burning) is mainly reflected in: the most of cloth of the higher mixed gas of concentration is at the cylinder middle part, and is relatively low near the concentration at wall place.Traditional spark plug is very near apart from wall, and the combustion gas of its higher melting concn of stratified mixture combustion is at cylinder middle part, and this has brought difficulty for design of oil sprayer.The appearance of Laser Igniter has injected new vitality for the in-cylinder direct injection technology; Adopt pulsed laser as the energy; Light path by optical fiber and lens are formed is introduced the firing chamber with high energy pulse laser, causes laser gathering along and reaches ignition condition, thereby realize the engine ignition burning.Yet mostly the Laser Igniter that proposes at present is that optics focuses structure, and its laser spot determines by optical system, and immobilizes, and point of ignition immobilizes, and also just is difficult to adapt to the operating mode of multiple complicacy in the cylinder and changeable igniting requirement.
Summary of the invention
The objective of the invention is, the motor laser-ignition unit that provides a kind of focal length to change, promptly point of ignition is controlled, and this will satisfy the operating mode of multiple complicacy in the cylinder and changeable igniting requirement.
Below in conjunction with accompanying drawing structural principle of the present invention is described.The distribution of the mixed gas of direct spray petrol engine in cylinder in cylinder; Very big with load and rotation speed change; Therefore the optimum igniting position of mixed gas also changes with the change of operating mode, and the present invention proposes solution to the relatively-stationary problem in present laser ignition position exactly.Pancratic motor laser-ignition unit comprises: cylinder cap, Laser Igniter housing, optical fiber, elementary (optics) lens, secondary (optics) lens, Primary lens fixed base, Secondary lens fixed base and protective glass etc.Its technological scheme is: optical fiber is fixed on the cylinder cap through the Laser Igniter housing; Be provided with Primary lens fixed base and Secondary lens fixed base in the Laser Igniter housing; Primary lens and Secondary lens are inlayed respectively and are crouched in lens fixed base separately, are built into the laser ignition light path.The lower end of Secondary lens fixed base is provided with protective glass, and the Laser Igniter housing is connected fixing with optical fiber.Laser beam is injected in the cylinder through optical fiber, Primary lens, Secondary lens and protective glass, converges at focus (ignition location).In order to reach the transportable purpose of ignition location, the laser ignition light path of being built must be able to realize varifocal adjusting focus point.Above or below the Primary lens fixed base, be provided with driving mechanism for this reason.Driving mechanism is made up of two blocks of ring electromagnets and guide line, and two blocks of ring electromagnets are separately fixed at the upper and lower of Primary lens fixed base.First ring electromagnet and second ring electromagnet by two guide line power supplies, are controlled the corresponding annular electromagnet respectively respectively.Driving the Primary lens fixed base perhaps adsorbs with first ring electromagnet; Perhaps with the absorption of second ring electromagnet, the Secondary lens distance changes relatively, realizes that the focus change focuses on apart from regulating.Its design principle is, makes one of two optical lens fixing, and another produces relative displacement.Secondary lens is fixed in this device, Primary lens produces displacement.
Characteristics of the present invention and beneficial effect are that (1) pancratic laser-ignition unit can be regulated the relative position of laser spot in cylinder according to the needs of different operating modes.Emphasis does not lie in and how to produce laser, how to conduct laser and how to distribute laser, and is how to make the laser spot can free adjustment in the firing chamber.(2) the Laser Igniter volume is little, and is in light weight, inserts an end of cylinder and only is made up of optical fiber and lens, and volume is about 1/10 of spark plug.(3) compare with spark plug that to have energy consumption little, high reliability features.Laser Igniter adopts the non-contact firing mode, does not therefore have near the problem of the carbon distribution of sparking-plug electrode.
Description of drawings
Shown in accompanying drawing drive the theory structure schematic representation of focusing for the present invention adopts the electromagnet mode.
Embodiment
Below in conjunction with accompanying drawing and through embodiment structure of the present invention is further described.Pancratic motor laser-ignition unit; Its concrete structure is: Laser Igniter housing 1 is fixed on the cylinder cap 2 through screw thread; Be provided with Primary lens fixed base 3 and Secondary lens fixed base 4 in the Laser Igniter housing, Primary lens 5 is inlayed respectively with Secondary lens 6 and is crouched in lens fixed base separately.The lower end of Secondary lens fixed base 4 is provided with protective glass 7; Laser Igniter housing 1 is connected fixing with optical fiber 8; Laser beam 9 is injected in the cylinder through optical fiber 8, Primary lens 5, Secondary lens 6 and protective glass 7, converges at focus 10.Above or below Primary lens fixed base 3, be provided with driving mechanism (like figure).Driving mechanism is made up of two ring electromagnet 11-1,11-2 and guide line 12, and two blocks of ring electromagnets place the upper and lower of Primary lens fixed base respectively.The first ring electromagnet 11-1 and the second ring electromagnet 11-2 by two guide line power supplies, control the corresponding annular electromagnet respectively respectively, drive the Primary lens fixed base and perhaps adsorb with first ring electromagnet; Perhaps, change, realize that focus 10 becomes focusing apart from regulating with this relative Secondary lens distance with the absorption of second ring electromagnet.
Can take homogeneous charge combustion mode or stratified mixture combustion pattern according to different operating modes during direct spray petrol engine in cylinder work.The inflammable mixture CONCENTRATION DISTRIBUTION of these two kinds of patterns is widely different.Mix throughout gas concentration is identical in its cylinder of homogeneous charge combustion mode, so the optimum igniting position is positioned at the firing chamber centre; Under the stratified mixture combustion pattern, inflammable mixture concentrates on the middle and lower part, firing chamber, so the optimum igniting position is also in the bottom.The optimum igniting position of generic hierarchical burning is than the low 3～5mm of homogeneous combustion.
With this driving focusing mode is example.The Primary lens 5 that is fixed on the Primary lens fixed base 3 has two displaced positions under the effect of first and second ring electromagnets.Beginning will be according to the focal length of firing chamber size Selection Primary lens 5 and Secondary lens 6, and Secondary lens fixed base 4, the first ring electromagnet 11-1 and second position of ring electromagnet 11-2 in Laser Igniter housing 1 are set.Its focusing process is: send signal through the first ring electromagnet guide line; Under the effect of electromagnetic force; The Primary lens fixed base is adsorbed in first ring electromagnet, and laser beam passes combination of lenses and converges at focus, optimum igniting position under Here it is the homogeneous charge combustion mode.In like manner; Send signal through the second ring electromagnet guide line; Primary lens fixed base 3 is adsorbed in second ring electromagnet, because the position of Primary lens 5 changes, causes the position of laser beam focus to be under the stratified mixture combustion pattern on the mixed gas optimum igniting position.Promptly, realize the conversion of ignition location (focus) through changing the control signal of ring electromagnet.Make motor under different combustion modes, can make the interior inflammable mixture of cylinder catch fire, thereby make internal-combustion engine obtain better power character, Economy and emission performance in the optimum igniting position.
The accurate control capable of using of the device of this variable ignition location provided by the invention makes point of ignition according to real-time the adjusting of the variation of operating mode; Make internal-combustion engine obtain best firing characteristic all the time; Improve burning efficiency of internal combustion engine; Reduce the internal-combustion engine oil consumption, realize the high-efficiency cleaning burning, reach the purpose of energy-conserving and environment-protective.
Claims (1)
1. pancratic motor laser-ignition unit; Comprise Laser Igniter housing (1), cylinder cap (2), Primary lens fixed base (3), Secondary lens fixed base (4), Primary lens (5), Secondary lens (6), protective glass (7) and optical fiber (8); Laser Igniter housing (1) is fixed on the cylinder cap (2) through screw thread; Laser Igniter housing (1) is connected fixing with optical fiber (8); Laser beam (9) is injected in the cylinder through optical fiber (8), Primary lens (5), Secondary lens (6) and protective glass (7), converges at focus (10), it is characterized in that being provided with in the Laser Igniter housing Primary lens fixed base (3) and Secondary lens fixed base (4); Primary lens (5) is inlayed respectively with Secondary lens (6) and is crouched in lens fixed base separately; The lower end of Secondary lens fixed base (4) is provided with protective glass (7), above or below Primary lens fixed base (3), is provided with driving mechanism, and driving mechanism is made up of two blocks of ring electromagnets (11-1,11-2) and guide line (12); Two blocks of ring electromagnets are separately fixed at the upper and lower of Primary lens fixed base (3); First ring electromagnet (11-1) and second ring electromagnet (11-2) by two guide lines (12) power supply, are controlled the corresponding annular electromagnet respectively respectively, drive Primary lens fixed base (3) and perhaps adsorb with first ring electromagnet; Perhaps with the absorption of second ring electromagnet, Secondary lens (6) distance changes relatively, realizes that focus (10) change focuses on apart from regulating.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100097268A CN102062037B (en) | 2011-01-18 | 2011-01-18 | Variable-focus engine laser ignition device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100097268A CN102062037B (en) | 2011-01-18 | 2011-01-18 | Variable-focus engine laser ignition device |
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| CN102062037A CN102062037A (en) | 2011-05-18 |
| CN102062037B true CN102062037B (en) | 2012-07-11 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2786881C1 (en) * | 2022-04-20 | 2022-12-26 | федеральное государственное бюджетное образовательное учреждение высшего образования "Казанский национальный исследовательский технический университет им. А.Н.Туполева-КАИ" | Method for operation of a pulsed laser rocket engine for systems of orientation, stabilization and correction of orbital spacecraft with low mass |
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| CN105134453B (en) * | 2015-08-24 | 2017-03-08 | 中国科学院半导体研究所 | Using the igniter under double mode laser gas breakdown mode and method |
| CN108443045B (en) * | 2018-05-10 | 2023-05-23 | 浙江大学 | Laser ignition device for multi-cylinder engine and method thereof |
| CN108443044B (en) * | 2018-05-10 | 2023-11-24 | 浙江大学 | Laser ignition device for engine and method thereof |
| CN110566998B (en) * | 2018-06-05 | 2022-01-25 | 青岛海尔智能技术研发有限公司 | Laser ignition device, gas water heater and ignition debugging method |
| CN110567158B (en) * | 2018-06-05 | 2022-03-29 | 青岛海尔智能技术研发有限公司 | Gas water heater |
| CN110566997A (en) * | 2018-06-05 | 2019-12-13 | 青岛海尔智能技术研发有限公司 | Laser ignition device and gas water heater |
| CN111677616B (en) * | 2020-05-07 | 2022-03-18 | 江苏大学 | Laser multipoint ignition system in rotor engine |
| CN111720854B (en) * | 2020-06-24 | 2021-08-10 | 南京唐模电气科技有限公司 | Non-contact electronic laser igniter |
| CN115008012A (en) * | 2022-07-05 | 2022-09-06 | 中国科学院力学研究所 | Zoom point laser welding method and device |
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| JP2006112355A (en) * | 2004-10-15 | 2006-04-27 | Denso Corp | Laser ignition device for internal combustion engine |
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| JPH0942138A (en) * | 1995-08-04 | 1997-02-10 | Mitsubishi Heavy Ind Ltd | Engine igniter |
| JP2006194151A (en) * | 2005-01-13 | 2006-07-27 | Nissan Motor Co Ltd | Laser ignitor for internal combustion engine |
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| JP2006112355A (en) * | 2004-10-15 | 2006-04-27 | Denso Corp | Laser ignition device for internal combustion engine |
| KR20060064901A (en) * | 2004-12-09 | 2006-06-14 | 현대자동차주식회사 | Variable focus type laser ignition apparatus of an automobile |
| JP2006329116A (en) * | 2005-05-27 | 2006-12-07 | Nissan Motor Co Ltd | Fuel reformed engine |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2786881C1 (en) * | 2022-04-20 | 2022-12-26 | федеральное государственное бюджетное образовательное учреждение высшего образования "Казанский национальный исследовательский технический университет им. А.Н.Туполева-КАИ" | Method for operation of a pulsed laser rocket engine for systems of orientation, stabilization and correction of orbital spacecraft with low mass |
| RU2794911C1 (en) * | 2022-10-05 | 2023-04-25 | Федеральное государственное бюджетное образовательное учреждение высшего образования "Казанский национальный исследовательский технический университет им. А.Н. Туполева - КАИ" | Pulsed laser rocket engine for systems of orientation, stabilization and correction of low-orbit spacecraft with low mass |
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| CN102062037A (en) | 2011-05-18 |
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