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WO2005080788A1 - Allumage laser a concentration automatique pour moteur a combustion interne - Google Patents

Allumage laser a concentration automatique pour moteur a combustion interne Download PDF

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Publication number
WO2005080788A1
WO2005080788A1 PCT/EP2005/050382 EP2005050382W WO2005080788A1 WO 2005080788 A1 WO2005080788 A1 WO 2005080788A1 EP 2005050382 W EP2005050382 W EP 2005050382W WO 2005080788 A1 WO2005080788 A1 WO 2005080788A1
Authority
WO
WIPO (PCT)
Prior art keywords
laser beam
injection
ignition
combustion chamber
laser
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.)
Ceased
Application number
PCT/EP2005/050382
Other languages
German (de)
English (en)
Inventor
Manfred Vogel
Werner Herden
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of WO2005080788A1 publication Critical patent/WO2005080788A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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

Definitions

  • the invention is based on an ignition device for an internal combustion engine with a laser element which emits a laser beam into a combustion chamber of the internal combustion engine.
  • This ignition device can be used as a continuously operating ignition system in gasoline engines and as a starting aid for diesel engines.
  • JP 101 96 508 A a start control method for an internal combustion engine is known in which a laser beam is used.
  • WO 02/095220 AI proposes adjustable optics, for example with piezoelectric actuators and mirror optics, in which the focus of the laser beam adapts adaptively to the requirements of an optimal combustion location.
  • the position of the injection jet or injection cone to be ignited, which is injected into the combustion chamber through injection nozzles, is also subject to changes and thus fluctuations, due to tolerances and changing combustion chamber conditions.
  • the object of the invention is to provide reliable ignition and ignition of injection jets or injection cones given the geometric tolerances of the injection valve, cylinder head and ignition device components and in the event of fluctuations in the injection jet.
  • the invention describes an arrangement by means of which a laser beam and fixed optics reliably on a predetermined
  • An injection jet or injection cone is to be ignited in the combustion chamber.
  • the solution is proposed by the features of claim 1.
  • an optimal ignition is achieved in that the laser wavelength of the laser beam used here is in a non-absorbing wavelength range of the fuel to achieve an ignition location within the combustion chamber of the internal combustion engine.
  • This can be achieved, for example, with an Nd: YAG laser with a wavelength of 1064 nm.
  • the power density of the laser is to be set in such a way that light refraction at droplets of the injected injection jet or injection cone results in a spark discharge in the flammable zone due to the higher density and thus the higher refractive index at the edge of the injection jet.
  • the focusing of the laser beam with fixed optics on the injection jet or cone to be ignited is to be interpreted in such a way that the focus is lower (at least on the injection jet axis of an individual jet or lower) than the zone to be ignited facing the laser on the edge of an injection jet or injection cone ,
  • Another alternative embodiment of generating an ignition point is to irradiate an unfocused laser beam with sufficient power so that a spark is generated by focusing on droplets and / or by refraction at the edge on the surface of the injection beam. This is also the place where the spark is most likely to ignite the fuel.
  • a further embodiment can consist in directing the optical assignment of a laser beam to an injection beam centrally in the middle of an injection beam.
  • Another important advantage of the invention is that with partial injection in the intake phase and residual injection in the compression phase, the laser beam is not absorbed by the mixture of the partial injection and can penetrate up to injection pulses in the compression phase and, as described above, a spark at the edge of an injection jet Ignition and ignition takes place.
  • the ignition in the laser focus is carried out by air sparks.
  • the ignition device according to the invention for an internal combustion engine with the features of the main claim has the advantage over the known that despite unavoidable tolerances, the combustion process is always safely initiated on the flammable outer zone of the injection jet or cone without tracking the ignition device.
  • the combustion of the gas mixture can thus be initiated in the combustion chamber, although the conventional ignition and starting aids such as spark plugs, Glow plugs, glow wire candles, flange start systems etc. are used, but a laser.
  • this has the advantage that the energy can be provided outside of the internal combustion engine by means of the laser.
  • the energy control itself can also take place outside the internal combustion engine. Since the energy supplied is laser light, there is no risk of a short circuit, since there is no need to lay an electrically insulated cable with the positive pole of the voltage near the engine block, which represents the reference potential.
  • the installation of the energy supply under the valve cover is advantageous, since this space has oil mist at elevated temperatures and can thus impair the insulation of a current-carrying cable.
  • Figure 1 is a schematically illustrated embodiment of an ignition device according to the invention, attached to a cylinder head with a multi-hole valve and an ignition laser with converging lens and glass window;
  • FIG. 2 shows a schematic illustration of the setting of the laser focus on the axis of an injection jet
  • FIG. 3 shows a further exemplary embodiment of setting the laser focus on the axis of an injection jet with a preferred position relative to the injection valve
  • FIG. 4 shows a further exemplary embodiment of an adjustment of a laser beam aligned in parallel
  • FIG. 5 shows the relationship between focus and ignition in the center of the injection jet cone.
  • the ignition means 1 is shown in FIG. It essentially consists of a laser 2 and an abrasive, the abrasive being provided to bring the laser beam 3 emitted by the laser to a combustion chamber 4.
  • a converging lens 5 is additionally provided, which focuses the emitted laser beam 6, specifically within the combustion chamber 4. So that the laser beam 6 can emit into the combustion chamber 4, a glass window 8 is additionally provided in the combustion chamber wall 7.
  • a multi-hole valve 9 projecting into the combustion chamber is provided, which injects fuel in the form of injection jets 10 in different directions within the combustion chamber 4.
  • the focusing of the laser beam is shown in FIG.
  • two different injection jets A and B are provided, the focus F of the laser 2 or the laser beam 3 being focused by the converging lens 5, so that it is always firmly positioned on the jet axis S.
  • the jet randes 11A, 11B
  • a spark 12A, 12B is formed, which leads to ignition and the subsequent combustion in this most flammable area.
  • FIG. 3 shows the preferred position of the laser beam 3 and its focus F.
  • the focus F is designed in such a way that it is arranged by an injection nozzle 13 in a range from a2 to a1, and is approximately 5 mm and a2 approximately 20 mm.
  • Radiance is up to a distance b (in the exemplary embodiment shown here approx. 8 mm) on the outer edge 11A, 11B of the injection jet AB so high that an air spark 12 A and 12 B forms in the edge region of the injection jet and this then ignites and leads to the following combustion.
  • FIG. 4 shows the embodiment that is the same as that of FIG. 3, but with the difference that the laser beam 3 of the laser 2 is not focused, but is aligned in parallel by means of a corresponding optical system 14.
  • the focusing also takes place again through interaction with droplets or / and refraction at the edge on the surface 11 A and B of the respective injection jets A, B, so that there is such a high power density at the respective edges of the injection jets that it is sufficient to achieve a To generate laser sparks 12 A and 12 B.
  • FIG. 5 shows in principle how a focused or parallel laser beam 3 (via optics 5) is aligned with an injection beam A in the center of an injection beam. So that the laser beam 3 can penetrate unhindered For example, individual injection jets C are hidden by the special shape of the injection nozzles.

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)
  • Ignition Installations For Internal Combustion Engines (AREA)

Abstract

L'invention concerne un dispositif d'allumage conçu pour un moteur à combustion interne et comprenant un élément laser émettant un faisceau laser afin de l'introduire dans la chambre de combustion du moteur à combustion interne. Ce dispositif d'allumage possède, de façon caractéristique, un système optique fixe (5) monté à l'extérieur de la chambre de combustion (4) et guidant le faisceau laser (3) jusqu'à une position déterminée à l'intérieur de ladite chambre de combustion (4), ce qui permet d'allumer un jet (A, B) injecté dans la chambre de combustion.
PCT/EP2005/050382 2004-02-19 2005-01-31 Allumage laser a concentration automatique pour moteur a combustion interne Ceased WO2005080788A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004008010.0 2004-02-19
DE200410008010 DE102004008010A1 (de) 2004-02-19 2004-02-19 Selbst fokussierende Laserzündung für einen Verbrennungsmotor

Publications (1)

Publication Number Publication Date
WO2005080788A1 true WO2005080788A1 (fr) 2005-09-01

Family

ID=34832792

Family Applications (1)

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PCT/EP2005/050382 Ceased WO2005080788A1 (fr) 2004-02-19 2005-01-31 Allumage laser a concentration automatique pour moteur a combustion interne

Country Status (2)

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DE (1) DE102004008010A1 (fr)
WO (1) WO2005080788A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006018339A1 (fr) * 2004-08-10 2006-02-23 Robert Bosch Gmbh Procede de formation de melange interne au moyen d'un rayon laser et moteur a combustion interne
WO2007060046A1 (fr) * 2005-11-28 2007-05-31 Robert Bosch Gmbh Moteur a combustion interne et procede d'utilisation d'un moteur a combustion interne par l'intermediaire d'un dispositif d'allumage laser
WO2010130675A1 (fr) * 2009-05-13 2010-11-18 Robert Bosch Gmbh Moteur à gaz à système d'allumage par laser
EP2461004A1 (fr) * 2010-11-30 2012-06-06 General Electric Company Optique avancée et accès optique pour systèmes d'allumage au laser pour moteurs à combustion
WO2013054188A3 (fr) * 2011-10-14 2013-06-13 Borissovskiy Vladimir Chambre de combustion d'un moteur diesel, procédé d'allumage d'un mélange carburant-air dans une chambre de combustion d'un moteur diesel, et moteur diesel associé
WO2013054187A3 (fr) * 2011-10-14 2013-06-13 Borissovskiy Vladimir Chambre de combustion d'un moteur à combustion interne, procédé d'allumage d'un mélange carburant-air , et moteur à combustion interne associé

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008291832A (ja) * 2007-04-26 2008-12-04 Ngk Spark Plug Co Ltd レーザ点火装置およびレーザ点火型内燃機関

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5587861A (en) * 1978-12-23 1980-07-03 Nissan Motor Co Ltd Igniter of internal combustion engine
JPS5870062A (ja) * 1981-10-21 1983-04-26 Nissan Motor Co Ltd 光ビ−ル点火式内燃機関
JPS5874875A (ja) * 1981-10-29 1983-05-06 Nippon Soken Inc 内燃機関用レ−ザ点火装置
JPS62210263A (ja) * 1986-03-12 1987-09-16 Mazda Motor Corp 内燃機関の燃焼促進装置
EP0631049A2 (fr) * 1993-06-23 1994-12-28 Simmonds Precision Engine Systems, Inc. Méthode et dispositif d'allumage à laser pour brûleurs à deux étages de gazéification
JPH10122115A (ja) * 1996-10-18 1998-05-12 Mitsubishi Heavy Ind Ltd 低セタン価エンジンの燃焼装置
US5756924A (en) * 1995-09-28 1998-05-26 The Regents Of The University Of California Multiple laser pulse ignition method and apparatus
WO1998048221A2 (fr) * 1997-04-21 1998-10-29 The Regents Of The University Of California Allumage au laser
DE19804463A1 (de) * 1998-02-05 1999-08-12 Daimler Chrysler Ag Kraftstoffeinspritzsystem für Ottomotoren
US20030136366A1 (en) * 2002-01-22 2003-07-24 Gunther Herdin Internal combustion engine

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5587861A (en) * 1978-12-23 1980-07-03 Nissan Motor Co Ltd Igniter of internal combustion engine
JPS5870062A (ja) * 1981-10-21 1983-04-26 Nissan Motor Co Ltd 光ビ−ル点火式内燃機関
JPS5874875A (ja) * 1981-10-29 1983-05-06 Nippon Soken Inc 内燃機関用レ−ザ点火装置
JPS62210263A (ja) * 1986-03-12 1987-09-16 Mazda Motor Corp 内燃機関の燃焼促進装置
EP0631049A2 (fr) * 1993-06-23 1994-12-28 Simmonds Precision Engine Systems, Inc. Méthode et dispositif d'allumage à laser pour brûleurs à deux étages de gazéification
US5756924A (en) * 1995-09-28 1998-05-26 The Regents Of The University Of California Multiple laser pulse ignition method and apparatus
JPH10122115A (ja) * 1996-10-18 1998-05-12 Mitsubishi Heavy Ind Ltd 低セタン価エンジンの燃焼装置
WO1998048221A2 (fr) * 1997-04-21 1998-10-29 The Regents Of The University Of California Allumage au laser
DE19804463A1 (de) * 1998-02-05 1999-08-12 Daimler Chrysler Ag Kraftstoffeinspritzsystem für Ottomotoren
US20030136366A1 (en) * 2002-01-22 2003-07-24 Gunther Herdin Internal combustion engine

Non-Patent Citations (4)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 004, no. 132 (M - 032) 17 September 1980 (1980-09-17) *
PATENT ABSTRACTS OF JAPAN vol. 007, no. 163 (M - 229) 16 July 1983 (1983-07-16) *
PATENT ABSTRACTS OF JAPAN vol. 007, no. 169 (M - 231) 26 July 1983 (1983-07-26) *
PATENT ABSTRACTS OF JAPAN vol. 1998, no. 10 31 August 1998 (1998-08-31) *

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006018339A1 (fr) * 2004-08-10 2006-02-23 Robert Bosch Gmbh Procede de formation de melange interne au moyen d'un rayon laser et moteur a combustion interne
WO2007060046A1 (fr) * 2005-11-28 2007-05-31 Robert Bosch Gmbh Moteur a combustion interne et procede d'utilisation d'un moteur a combustion interne par l'intermediaire d'un dispositif d'allumage laser
US7765980B2 (en) 2005-11-28 2010-08-03 Robert Bosch Gmbh Internal combustion engine and method for operating an internal combustion engine by means of a laser ignition unit
CN101317003B (zh) * 2005-11-28 2012-08-08 罗伯特·博世有限公司 内燃机以及用于借助激光点火装置运行内燃机的方法
WO2010130675A1 (fr) * 2009-05-13 2010-11-18 Robert Bosch Gmbh Moteur à gaz à système d'allumage par laser
EP2461004A1 (fr) * 2010-11-30 2012-06-06 General Electric Company Optique avancée et accès optique pour systèmes d'allumage au laser pour moteurs à combustion
US8616006B2 (en) 2010-11-30 2013-12-31 General Electric Company Advanced optics and optical access for laser ignition for gas turbines including aircraft engines
WO2013054188A3 (fr) * 2011-10-14 2013-06-13 Borissovskiy Vladimir Chambre de combustion d'un moteur diesel, procédé d'allumage d'un mélange carburant-air dans une chambre de combustion d'un moteur diesel, et moteur diesel associé
WO2013054187A3 (fr) * 2011-10-14 2013-06-13 Borissovskiy Vladimir Chambre de combustion d'un moteur à combustion interne, procédé d'allumage d'un mélange carburant-air , et moteur à combustion interne associé
US9739232B2 (en) 2011-10-14 2017-08-22 Vladimir Borissovskiy Igniting a fuel-air mixture in a combustion chamber of a diesel engine
EP2766597B1 (fr) * 2011-10-14 2022-05-11 Borissovskiy, Vladimir Chambre de combustion d'un moteur diesel, procédé d'allumage d'un mélange carburant-air dans une chambre de combustion d'un moteur diesel, et moteur diesel associé

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