JP3137490B2 - Laser ignition device - Google Patents
Laser ignition deviceInfo
- Publication number
- JP3137490B2 JP3137490B2 JP05061398A JP6139893A JP3137490B2 JP 3137490 B2 JP3137490 B2 JP 3137490B2 JP 05061398 A JP05061398 A JP 05061398A JP 6139893 A JP6139893 A JP 6139893A JP 3137490 B2 JP3137490 B2 JP 3137490B2
- Authority
- JP
- Japan
- Prior art keywords
- optical window
- fuel
- laser
- cleaning
- laser light
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 230000003287 optical effect Effects 0.000 claims description 26
- 239000000446 fuel Substances 0.000 claims description 25
- 238000002485 combustion reaction Methods 0.000 claims description 12
- 239000007921 spray Substances 0.000 claims description 8
- 239000002828 fuel tank Substances 0.000 claims description 5
- 238000002347 injection Methods 0.000 claims description 5
- 239000007924 injection Substances 0.000 claims description 5
- 230000006835 compression Effects 0.000 claims description 3
- 238000007906 compression Methods 0.000 claims description 3
- 238000007664 blowing Methods 0.000 claims 1
- 238000004140 cleaning Methods 0.000 description 17
- 239000005357 flat glass Substances 0.000 description 10
- 239000007788 liquid Substances 0.000 description 6
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- 230000002238 attenuated effect Effects 0.000 description 3
- 238000011109 contamination Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000001678 irradiating effect Effects 0.000 description 1
- 231100000989 no adverse effect Toxicity 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02P—IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES
- F02P23/00—Other ignition
- F02P23/04—Other physical ignition means, e.g. using laser rays
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Combustion Methods Of Internal-Combustion Engines (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は液体燃料エンジンのレー
ザ着火装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a laser ignition device for a liquid fuel engine.
【０００２】[0002]
【従来の技術】内燃機関のシリンダ内に噴射された燃料
噴霧にレーザ光を照射して着火させるものには実願昭６
３−１４１８９０、実願昭６３−１４１１６７等多く出
願があるがレーザ光を発する光学窓のクリーニングまで
考慮したレーザ着火装置はない。2. Description of the Related Art A fuel spray injected into a cylinder of an internal combustion engine is irradiated with laser light to ignite the fuel.
Although many applications have been filed, such as 3-141890 and Japanese Utility Model Application 63-141167, there is no laser ignition device that takes into consideration the cleaning of an optical window that emits laser light.
【０００３】[0003]
【発明が解決しようとする課題】レーザによる着火を続
けるとレーザ光を燃焼室に導く光学窓が次第に汚れレー
ザ光が光学窓で減衰してレーザ着火が行えなくなる。本
発明の目的は前記不具合を解消し光学窓の汚れによりレ
ーザ光が減衰してレーザ着火が行えなくなることのない
レーザ着火装置を提供することである。If the ignition by the laser is continued, the optical window for guiding the laser light to the combustion chamber gradually becomes dirty, and the laser light is attenuated by the optical window, so that the laser cannot be ignited. SUMMARY OF THE INVENTION It is an object of the present invention to provide a laser ignition device which solves the above-mentioned problem and prevents laser light from attenuating due to dirt on an optical window and making laser ignition impossible.
【０００４】[0004]
【課題を解決するための手段】内燃機関のシリンダ内に
燃料噴射ノズルを配し同燃料噴射ノズルから噴射される
噴霧に光学窓を介したレーザ光を照射して着火するもの
において、前記レーザ光を導く光学窓に燃料タンクから
の燃料の一部を機関の圧縮行程開始直後に吹きつけて光
学窓を洗浄し光学窓をクリーンに保つ機構を設けたこと
を特徴とする。SUMMARY OF THE INVENTION In what ignited by irradiating a laser beam through the optical window to the spray injected from the fuel injection nozzle arranged fuel injection nozzles into the engine cylinder, the laser beam Guide the optical window from the fuel tank
A mechanism for spraying a portion of the fuel immediately after the start of the compression stroke of the engine to clean the optical window and keep the optical window clean.
【０００５】[0005]
（１）光学窓洗浄用ノズルから液体燃料（例えばメタノ
ール軽油等）そのものを洗浄液として光学窓に噴射して
光学窓の汚れをおとす。この場合液体燃料は有機溶剤と
しても用いられるものが多いので洗浄能力もある上燃料
自体であるため、洗浄を行った後の燃焼に与える悪い影
響が全くない。 （２）洗浄時期として圧縮行程開始直後に行うため、圧
力も低く噴射しやすく又洗浄後レーザ光が発射されるま
での間窓ガラスに残った燃料が蒸発する時間が確保でき
るので残留液によるレーザ光への悪影響を除くことがで
きる。(1) A liquid fuel (for example, methanol gas oil) itself is sprayed as a cleaning liquid onto the optical window from the optical window cleaning nozzle to remove dirt from the optical window. In this case, since the liquid fuel is often used also as an organic solvent, it has a cleaning ability and is a fuel itself, so there is no bad influence on combustion after cleaning. (2) Since the cleaning is performed immediately after the start of the compression stroke, the pressure is low and it is easy to inject the fuel. Also, the time required for the fuel remaining on the window glass to evaporate until the laser beam is emitted after cleaning can be secured, so that the laser by the residual liquid is used. The adverse effect on light can be eliminated.
【０００６】[0006]
【実施例】本発明の実施例を図１，２によって説明す
る。図１は実施例の構成図、図２は実施例のレーザ光ガ
イド部先端の詳細図である。図において５は燃焼室、６
は燃料ノズル、１５はピストンで何れも内燃機関の公知
の要素である。４はレーザ光ガイドで中心に貫通した穴
がある。３は光学窓ガラスでレーザ光ガイド４の燃焼室
側の端に設けられ透明で且、燃焼室５と外気とを隔離し
ている。２はレンズでレーザ光ガイド４の中に設けられ
ている。７は燃料噴霧で燃料ノズル６からクランク角に
同期して噴射される。１はレーザ光で燃料噴射に同期し
て図示しないレーザ源から発せられ光学窓ガラス３を通
して燃焼室５内へ照射されるパルス状着火用レーザ光で
ある。１２は端面で光学窓ガラス３の燃焼室内の端面で
ある。１１は洗浄用ノズルで光学窓ガラス３の端面１２
に向けて設けられ電磁弁に接続されている。An embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a configuration diagram of an embodiment, and FIG. 2 is a detailed view of a tip of a laser light guide unit of the embodiment. In the figure, 5 is a combustion chamber, 6
Denotes a fuel nozzle, and 15 denotes a piston, both of which are known elements of an internal combustion engine. Reference numeral 4 denotes a laser light guide having a through hole at the center. Reference numeral 3 denotes an optical window glass which is provided at the end of the laser beam guide 4 on the combustion chamber side and is transparent and separates the combustion chamber 5 from the outside air. Reference numeral 2 denotes a lens provided in the laser light guide 4. Reference numeral 7 denotes a fuel spray which is injected from the fuel nozzle 6 in synchronization with the crank angle. Reference numeral 1 denotes a pulsed ignition laser beam emitted from a laser source (not shown) in synchronization with fuel injection and emitted through the optical window glass 3 into the combustion chamber 5. Reference numeral 12 denotes an end surface of the optical window glass 3 in the combustion chamber. Reference numeral 11 denotes a cleaning nozzle, an end surface 12 of the optical window glass 3.
And connected to a solenoid valve.
【０００７】１０は電磁弁でポンプに接続されている。
９は洗浄用ポンプで燃料タンクに接続されている。８は
燃料タンクである。１３は洗浄用噴霧でピストン１５の
下死点に同期して洗浄用ノズル１１から光学窓ガラスの
端面１２に向け噴射される。１４はピストン１５の下死
点信号で電磁弁９に入力される。Reference numeral 10 denotes an electromagnetic valve connected to the pump.
A cleaning pump 9 is connected to the fuel tank. 8 is a fuel tank. Numeral 13 denotes a cleaning spray which is sprayed from the cleaning nozzle 11 toward the end face 12 of the optical window glass in synchronization with the bottom dead center of the piston 15. Reference numeral 14 denotes a bottom dead center signal of the piston 15 which is input to the solenoid valve 9.
【０００８】前記実施例の作用を説明する。ピストン１
５の下死点の信号１４が入力され電磁弁１０が開き、燃
料タンク８の燃料を洗浄用ポンプ９が圧送し電磁弁１０
を通って洗浄用ノズル１１から洗浄用噴霧１３が光学窓
ガラス３の端面１２に噴射されこれを洗浄する。燃料ノ
ズル６はクランク角に同期して燃料噴霧７を噴射しこれ
に同期して図示しないレーザ源から発せられたパルス状
レーザ光がレーザ光ガイド４の中を通りレンズ２で集光
され光学窓ガラス３を通り端面１２からレーザ光１が照
射される。The operation of the above embodiment will be described. Piston 1
5 is input, the solenoid valve 10 is opened, the fuel in the fuel tank 8 is pumped by the cleaning pump 9 and the solenoid valve 10 is opened.
The cleaning spray 13 is sprayed from the cleaning nozzle 11 onto the end surface 12 of the optical window glass 3 to clean the same. The fuel nozzle 6 injects a fuel spray 7 in synchronism with the crank angle, and in synchronism with this, a pulsed laser light emitted from a laser source (not shown) passes through the laser light guide 4 and is condensed by the lens 2 so as to be focused on the optical window. The laser beam 1 is emitted from the end face 12 through the glass 3.
【０００９】[0009]
【発明の効果】レーザ照射の前に毎回光学窓ガラスが洗
浄能力を具えている燃料で洗浄されるので、光学窓ガラ
スの汚れによるレーザ光の減衰がなく常にレーザ着火が
可能となり、且つ洗浄液は燃焼に供される燃料そのもの
であるので燃焼に悪影響を及ぼさない。よって本発明は
光学窓の汚れによりレーザ光が減衰してレーザ着火が行
えなくなることのないレーザ着火装置を提供できる。The optical window glass is washed every time before the laser irradiation.
Since the washing with fuel which comprises a purification ability, always possible laser ignition without attenuation of the laser light due to contamination of the optical window glass, so and the cleaning liquid is a fuel itself <br/> to be combusted combustion Has no adverse effect on Therefore, the present invention can provide a laser ignition device in which laser light is not attenuated due to attenuated laser light due to contamination of an optical window.
【図１】実施例の構成図。FIG. 1 is a configuration diagram of an embodiment.
【図２】実施例のレーザ光ガイド先端部の詳細図。FIG. 2 is a detailed view of a laser light guide tip of the embodiment.
１…レーザ光、２…レンズ、３…光学窓ガラス、４…レ
ーザ光ガイド、５…燃焼室、６…燃料ノズル、７…燃料
噴霧、１１…洗浄用ノズル、１２…端面、１３…洗浄用
噴霧。DESCRIPTION OF SYMBOLS 1 ... Laser light, 2 ... Lens, 3 ... Optical window glass, 4 ... Laser light guide, 5 ... Combustion chamber, 6 ... Fuel nozzle, 7 ... Fuel spray, 11 ... Cleaning nozzle, 12 ... End face, 13 ... Cleaning Spraying.
フロントページの続き (72)発明者 稲永 紀康 長崎県長崎市深堀町５丁目717番１号 三菱重工業株式会社長崎研究所内 (56)参考文献 特開 昭55−72662（ＪＰ，Ａ) 特開 昭55−87861（ＪＰ，Ａ) 実開 昭59−100925（ＪＰ，Ｕ) 実開 昭60−34568（ＪＰ，Ｕ) (58)調査した分野(Int.Cl.7，ＤＢ名) F02P 23/04 Continuation of the front page (72) Inventor Noriyasu Inagashi 5-7-17-1 Fukahori-cho, Nagasaki-shi, Nagasaki Mitsubishi Heavy Industries, Ltd. Nagasaki Research Laboratory (56) References JP-A-55-72662 (JP, A) JP-A-55 −87861 (JP, A) Fully open sho 59-100925 (JP, U) Fully open sho 60-34568 (JP, U) (58) Fields investigated (Int. Cl. 7 , DB name) F02P 23/04
Claims (1)
（６）を配し同燃料噴射ノズルから噴射される噴霧
（７）に光学窓（３）を介したレーザ光（１）を照射し
て着火するものにおいて、前記レーザ光（１）を導く光
学窓（３）に燃料タンクからの燃料の一部を機関の圧縮
行程開始直後に吹きつけて光学窓（３）を洗浄し光学窓
をクリーンに保つ機構を設けたことを特徴とするレーザ
着火装置。1. A fuel injection nozzle (6) is arranged in a cylinder of an internal combustion engine, and a spray (7) injected from the fuel injection nozzle is irradiated with a laser beam (1) through an optical window (3). clean in which ignition of the laser beam (1) the guiding optical window (3) a portion of the fuel from the fuel tank by blowing immediately after the compression stroke starts the engine was washed an optical window (3) to the optical window A laser ignition device characterized by having a mechanism for maintaining the ignition temperature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP05061398A JP3137490B2 (en) | 1993-02-26 | 1993-02-26 | Laser ignition device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP05061398A JP3137490B2 (en) | 1993-02-26 | 1993-02-26 | Laser ignition device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06249123A JPH06249123A (en) | 1994-09-06 |
| JP3137490B2 true JP3137490B2 (en) | 2001-02-19 |
Family
ID=13170012
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP05061398A Expired - Fee Related JP3137490B2 (en) | 1993-02-26 | 1993-02-26 | Laser ignition device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3137490B2 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR19980063120A (en) * | 1996-12-31 | 1998-10-07 | 박병재 | Purifier of Engine Cylinder |
| JP4836681B2 (en) * | 2006-06-20 | 2011-12-14 | 川崎重工業株式会社 | Laser ignition device for easy optical window cleaning |
| DE102011079043A1 (en) * | 2011-07-13 | 2013-01-17 | Robert Bosch Gmbh | Laser spark plug and cleaning method therefor |
| JP6457759B2 (en) * | 2014-07-31 | 2019-01-23 | 三菱重工エンジン＆ターボチャージャ株式会社 | Engine with laser spark plug |
| EP3376021B1 (en) * | 2017-03-16 | 2022-05-04 | Ricoh Company, Ltd. | Laser device and internal combustion engine |
-
1993
- 1993-02-26 JP JP05061398A patent/JP3137490B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH06249123A (en) | 1994-09-06 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20001031 |
|
| LAPS | Cancellation because of no payment of annual fees |