EP2516841A1 - Dispositif d'allumage de laser et procédé d'exploitation pour un dispositif d'allumage de laser - Google Patents
Dispositif d'allumage de laser et procédé d'exploitation pour un dispositif d'allumage de laserInfo
- Publication number
- EP2516841A1 EP2516841A1 EP10785385A EP10785385A EP2516841A1 EP 2516841 A1 EP2516841 A1 EP 2516841A1 EP 10785385 A EP10785385 A EP 10785385A EP 10785385 A EP10785385 A EP 10785385A EP 2516841 A1 EP2516841 A1 EP 2516841A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- laser
- ignition
- ignition device
- points
- radiation
- 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.)
- Withdrawn
Links
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
- F02P13/00—Sparking plugs structurally combined with other parts of internal-combustion engines
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B19/00—Engines characterised by precombustion chambers
- F02B19/12—Engines characterised by precombustion chambers with positive ignition
-
- 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
-
- 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
- F02P15/00—Electric spark ignition having characteristics not provided for in, or of interest apart from, groups F02P1/00 - F02P13/00 and combined with layout of ignition circuits
- F02P15/02—Arrangements having two or more sparking plugs
-
- 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
- F02P15/00—Electric spark ignition having characteristics not provided for in, or of interest apart from, groups F02P1/00 - F02P13/00 and combined with layout of ignition circuits
- F02P15/08—Electric spark ignition having characteristics not provided for in, or of interest apart from, groups F02P1/00 - F02P13/00 and combined with layout of ignition circuits having multiple-spark ignition, i.e. ignition occurring simultaneously at different places in one engine cylinder or in two or more separate engine cylinders
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
Definitions
- the invention relates to a laser ignition device, in particular for a
- Internal combustion engine with a pre-chamber and with a laser device which is adapted to irradiate laser radiation to at least two mutually different in each case located in the prechamber ignition points.
- the invention further relates to an operating method for such
- the laser device is adapted to irradiate the laser radiation selectively to one or more of the ignition points.
- the laser ignition process can advantageously be adapted to the respective operating state of the internal combustion engine or of another target system which contains the laser ignition device according to the invention.
- Laser device has at least two laser spark plugs. This means that, according to the invention, a plurality of laser spark plugs can be combined with one another in such a way that they permit an impingement of the antechamber with laser ignition pulses according to the invention.
- a particularly favorable distribution of ignition points within the antechamber is, according to a further advantageous embodiment of the invention, realizable in that at least two laser spark plugs differ
- the laser ignition device may have at least one bifocal focusing optic which, when subjected to a laser ignition pulse, has a corresponding one
- FIG. 2 is a block diagram illustrating the driving principle of the laser ignition device of Figure 1
- FIG. 3 shows a combustion chamber-facing end section of a second
- FIG. 1 shows a combustion chamber-facing end section of a first
- Embodiment of the laser ignition device 100 according to the invention Embodiment of the laser ignition device 100 according to the invention.
- Laser ignition device 100 has an antechamber 1 10 and is presently arranged in a cylinder head 200 of an internal combustion engine, that the pre-chamber 1 10 protrudes into a combustion chamber 300 of the internal combustion engine.
- the laser ignition device 100 further has a laser device 120, which is designed to laser radiation 24a, 24b on at least two mutually different in the pre-chamber 1 10 lying ignition points ZP1, ZP2
- an ignitable mixture located in the prechamber 110 can be ignited in a manner known per se at two ignition points.
- energetic Zündfackeln 1 16a, 1 16b pass through unspecified overflow from the antechamber 1 10 in the combustion chamber 300 of
- a particularly versatile operation of the laser ignition device 100 according to the invention is given by the fact that the laser device 120 is designed to selectively couple the laser radiation 24a, 24b to one or more of the ignition points ZP1, To inject ZP2.
- the pressure in the pre-chamber and thus the length of the torch, ie the length of the ignition torches 1 16a, 16b emerging from the pre-chamber 110, can advantageously be controlled.
- the laser radiation 24a, 24b advantageously on both of the several possible
- Ignition points ZP1, ZP2 are irradiated. This state is shown in FIG. Due to the laser ignition in both ignition points ZP1, ZP2 the combustion in the prechamber 1 10 despite lower filling sufficiently accelerated, so that the increase in pressure in the prechamber 1 10 causes a similar torch reach for the ignition flares 16a, 16b 1 as a larger filling of Prechamber 1 10.
- the possibility of flexible single or multiple local laser ignition in the antechamber 1 10 is given by the fact that the laser device 120 has two laser spark plugs 122 a, 122 b, which are integrated into a common housing 130.
- Housing 130 can - for example, be screwed into the cylinder head 200 - analogously to conventional laser spark plugs. If necessary, instead of two laser spark plugs 122a, 122b, three or more laser spark plugs may also be combined, so that further different ignition points can be realized.
- the present variant of the invention is structurally particularly easy to implement, since - at least with regard to the mechanical arrangement - conventional laser spark plugs 122a, 122b can be used.
- Another degree of freedom for the laser ignition according to the invention in the prechamber 110 is given by the fact that the laser spark plugs 122a, 122b or focusing optics contained therein for bundling the laser radiation 24a, 24b have different focal lengths.
- FIG. 2 schematically shows a block diagram indicating a drive principle for the laser ignition device 100 according to the invention.
- a motor controller 400 e.g. also takes over a fuel injection and other control or regulation tasks known to those skilled in the art for the operation of the internal combustion engine, controls two pump lasers 410a, 410b.
- the pump lasers 410a, 410b can be designed, for example, as semiconductor laser diodes which can be activated via an electrical drive current.
- the intensity of the laser radiation emitted by the pump lasers 410a, 410b depends i.a. directly from the drive current.
- the laser radiation generated by the pump lasers 410a, 410b is transferred to the ignition lasers 420a, 420b
- Fiber optic devices 415a, 415b supplied.
- Ignition lasers 420a, 420b may, for example, be passively Q-switched solid-state lasers, each having a laser-active solid and an associated passive Q-switching.
- the ignition lasers 420a, 420b By applying the ignition lasers 420a, 420b to the laser radiation generated by the pump lasers 410a, 410b, high-energy laser ignition pulses 24a, 24b can thus be generated by the ignition lasers 420a, 420b.
- the ignition laser 420a, 420b is assigned a respective focusing optic with a corresponding focal length.
- the first ignition laser 420a from FIG. 2 and an associated focusing optics may be contained in the laser spark plug 122a according to FIG. 1, while the second laser spark plug 122b according to FIG. 1 has the second ignition laser 420b from FIG. 2 and an focusing optics associated therewith.
- the pump lasers 410a, 410b are preferably arranged away from the laser ignition device 100, for example in spatial proximity to the motor control 400. Integration of the pump lasers 410a, 410b in the motor control 400 is also conceivable.
- the pump lasers 410a, 41 Ob can also be used in one be summarized common pumping module.
- the laser spark plugs 122a, 122b are provided with that required for the optical pumping of the ignition lasers 420a, 420b
- Laser radiation supplied by the pumping fibers 410a, 410b Laser radiation supplied by the pumping fibers 410a, 410b.
- the engine control 400 can set, for example, depending on a characteristic diagram different timing Anêtstromverrise and thus corresponding pumping profiles for the optical pumping of the ignition 420a, 420b, so that the laser ignition in the prechamber 1 10 depending on the operating point of the internal combustion engine at a single or at several ignition ZP1 , ZP2 takes place.
- the temporal sequence of the admission of the individual ignition points ZP1, ZP2 can also be predetermined by the engine control 400. It can be ignited both simultaneously at a plurality of ignition points ZP1, ZP2 as well as offset in time at a plurality of ignition points ZP1, ZP2 or at individual ignition points.
- Laser ignition device 100 may, in particular, the torch length of the ignition torches 16a, 16b 16 ( Figure 1) as a function of an operating point of
- FIG. 3 shows a combustion chamber-facing end section of a second
- Embodiment of the laser ignition device 100 according to the invention provides only one laser spark plug 122a for the laser device 120.
- the laser device 120 according to FIG. 3 has a bifocal focusing lens 124.
- the bifocal focusing optics 124 bundles the laser radiation 24 generated by the laser device 120 as a function of the beam cross section, in this case in particular of the beam cross section
- a core beam 24a is collimated by a first curvature region of the focusing optics 124 onto the first ignition point ZP1, while a cladding beam 24b is focused by a second curvature region of the focusing optical system 124 onto the second ignition point ZP2.
- the influencing of the beam profile of the laser radiation 24, which in the present case controls the selection of the ignition points ZP1, ZP2, can take place in a manner known per se, for example by juxtaposed ignition lasers 420a, 420b, which in the present case are integrated in the laser spark plug 122a and are controlled as required ,
- only one ignition laser 420a may be integrated in the laser spark plug 122, and the laser device 120 may be configured to operate at moderate
- the ignition points ZP1, ZP2 can be selected.
- Radiation density only in the middle of the beam cross-section (e.g., Gaussprofil) is high enough to turn on the solid state laser by means of its passive Q-switch only there, so that a Zündlaserstrahl small diameter is formed compared to the application of higher pump powers, in which
- the pump power can be controlled by the current of the pump laser (semiconductor laser).
- Laser ignition in the prechamber 110 advantageously makes it possible to influence the torch reach of the ignition torches 16a, 16b (FIG. 1), so that even with different degrees of filling of the prechamber 110, for example substantially equal torch reaches can be achieved.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Combustion Methods Of Internal-Combustion Engines (AREA)
- Lasers (AREA)
Abstract
L'invention concerne un dispositif d'allumage de laser (100), en particulier pour un moteur à combustion interne, comprenant une préchambre (110) et un dispositif laser (120), qui est conçu pour injecter, en particulier focaliser, du rayonnement laser (24, 24a, 24b) sur au moins deux points d'allumage (ZP1, ZP2) différents l'un de l'autre et situés dans la préchambre (110). Selon l'invention, le dispositif laser (120) est conçu pour injecter le rayonnement laser (24, 24a, 24b) en option sur un ou plusieurs points d'allumage (ZP1, ZP2).
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102009055040A DE102009055040A1 (de) | 2009-12-21 | 2009-12-21 | Laserzündeinrichtung und Betriebsverfahren für eine Laserzündeinrichtung |
PCT/EP2010/067719 WO2011085846A1 (fr) | 2009-12-21 | 2010-11-18 | Dispositif d'allumage de laser et procédé d'exploitation pour un dispositif d'allumage de laser |
Publications (1)
Publication Number | Publication Date |
---|---|
EP2516841A1 true EP2516841A1 (fr) | 2012-10-31 |
Family
ID=43629542
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP10785385A Withdrawn EP2516841A1 (fr) | 2009-12-21 | 2010-11-18 | Dispositif d'allumage de laser et procédé d'exploitation pour un dispositif d'allumage de laser |
Country Status (4)
Country | Link |
---|---|
US (1) | US20130000597A1 (fr) |
EP (1) | EP2516841A1 (fr) |
DE (1) | DE102009055040A1 (fr) |
WO (1) | WO2011085846A1 (fr) |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102007041531A1 (de) * | 2007-08-31 | 2009-03-05 | Robert Bosch Gmbh | Lasereinrichtung und Betriebsverfahren hierfür |
JP6478509B2 (ja) * | 2014-07-31 | 2019-03-06 | 株式会社Soken | レーザ点火装置 |
WO2016028760A1 (fr) | 2014-08-18 | 2016-02-25 | Woodward, Inc. | Allumeur de chalumeau |
EP3045715A1 (fr) * | 2015-01-16 | 2016-07-20 | Caterpillar Energy Solutions GmbH | Ensemble chambre de précombustion à allumage laser |
US9548585B1 (en) | 2015-07-16 | 2017-01-17 | U.S. Department Of Energy | Multi-point laser ignition device |
CN105134453B (zh) * | 2015-08-24 | 2017-03-08 | 中国科学院半导体研究所 | 采用双模式激光气体击穿方式下的点火装置及方法 |
US9951744B2 (en) | 2016-05-26 | 2018-04-24 | Denso International America, Inc. | Optimized multiple laser ignition plug |
RU2649720C1 (ru) * | 2017-01-10 | 2018-04-04 | Николай Борисович Болотин | Лазерная свеча зажигания |
US11421601B2 (en) | 2019-03-28 | 2022-08-23 | Woodward, Inc. | Second stage combustion for igniter |
DE102019131360B4 (de) * | 2019-11-20 | 2024-05-02 | Bayerische Motoren Werke Aktiengesellschaft | Zylinderkopf für eine fremd gezündete Hubkolben-Brennkraftmaschine |
US11519378B2 (en) * | 2020-05-19 | 2022-12-06 | Wisconsin Alumni Research Foundation | Internal combustion engine with laser-assisted, compression ignition |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5581272A (en) * | 1978-12-14 | 1980-06-19 | Nissan Motor Co Ltd | Ignition apparatus for internal combustion engine |
US4726336A (en) * | 1985-12-26 | 1988-02-23 | Eaton Corporation | UV irradiation apparatus and method for fuel pretreatment enabling hypergolic combustion |
JPH01193081A (ja) * | 1988-01-29 | 1989-08-03 | Mitsubishi Motors Corp | 内燃機関の着火補助装置 |
AT5307U1 (de) * | 2001-04-23 | 2002-05-27 | Avl List Gmbh | Brennkraftmaschine mit fremdzündung |
AT412167B (de) * | 2002-10-31 | 2004-10-25 | Ge Jenbacher Gmbh & Co Ohg | Verbrennungsmotor |
AT500692B1 (de) * | 2003-01-16 | 2008-01-15 | Ge Jenbacher Gmbh & Co Ohg | Verbrennunsmotor mit mindestens einem zylinder |
FR2873763B1 (fr) * | 2004-07-29 | 2009-06-12 | Peugeot Citroen Automobiles Sa | Dispositif d'allumage pour moteur a combustion interne et moteur comportant un tel dispositif |
DE102007015036B4 (de) * | 2007-03-29 | 2008-11-20 | Multitorch Gmbh | Laserzündung für Gasgemische |
DE102007044004A1 (de) * | 2007-09-14 | 2009-03-19 | Robert Bosch Gmbh | Verfahren zum Betreiben einer Zündeinrichtung |
US7770552B2 (en) * | 2007-10-31 | 2010-08-10 | Caterpillar Inc. | Laser igniter having integral pre-combustion chamber |
AT506200B1 (de) * | 2007-12-19 | 2009-09-15 | Ge Jenbacher Gmbh & Co Ohg | Vorrichtung zur zündung eines brennstoff/luftgemischs im brennraum einer brennkraftmaschine |
AT506201B1 (de) * | 2007-12-20 | 2009-09-15 | Ge Jenbacher Gmbh & Co Ohg | Laserzündeinrichtung |
DE102010003899A1 (de) * | 2010-04-13 | 2011-10-13 | Robert Bosch Gmbh | Laserzündkerze mit einer Vorkammer |
-
2009
- 2009-12-21 DE DE102009055040A patent/DE102009055040A1/de not_active Withdrawn
-
2010
- 2010-11-18 EP EP10785385A patent/EP2516841A1/fr not_active Withdrawn
- 2010-11-18 WO PCT/EP2010/067719 patent/WO2011085846A1/fr active Application Filing
- 2010-11-18 US US13/517,192 patent/US20130000597A1/en not_active Abandoned
Non-Patent Citations (1)
Title |
---|
See references of WO2011085846A1 * |
Also Published As
Publication number | Publication date |
---|---|
WO2011085846A1 (fr) | 2011-07-21 |
DE102009055040A1 (de) | 2011-06-22 |
US20130000597A1 (en) | 2013-01-03 |
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STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
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18D | Application deemed to be withdrawn |
Effective date: 20160601 |