EP1253316A2 - Zündeinrichtung für eine Brennkraftmaschine mit Fremdzündung - Google Patents
Zündeinrichtung für eine Brennkraftmaschine mit Fremdzündung Download PDFInfo
- Publication number
- EP1253316A2 EP1253316A2 EP02450093A EP02450093A EP1253316A2 EP 1253316 A2 EP1253316 A2 EP 1253316A2 EP 02450093 A EP02450093 A EP 02450093A EP 02450093 A EP02450093 A EP 02450093A EP 1253316 A2 EP1253316 A2 EP 1253316A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- ignition
- laser beam
- ignition device
- mirror
- 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.)
- Granted
Links
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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 relates to an ignition device for an internal combustion engine Spark ignition, the ignition of the fuel by at least one an ignition location in a combustion chamber focused laser beam takes place with a Laser source and a focusing device for providing and focusing of the laser beam, an optical device in the beam path of the laser beam is arranged for beam deflection and / or beam splitting, by means of that of the laser beam at at least two different ignition locations in the combustion chamber is focusable.
- An internal combustion engine with spark ignition is known from DE 199 11 737 A1, in which the laser beams are arranged in the cylinder head gasket Optical fibers are led into the combustion chamber. There is one at the end of each light guide Focusing device arranged around the laser beam in the combustion chamber Focus point. One focal point per laser beam can thus be in the combustion chamber be formed.
- US 4,852,529 A, US 4,314,530 A and US 4,416,226 A describe Laser ignition devices for internal combustion engines, in which the laser beam over an opening in the cylinder head is made in the combustion chamber.
- a focusing device is provided to the laser beam in to focus on a point in the combustion chamber.
- Laser ignition devices for internal combustion engines with means for beam deflection and / or beam splitting of the laser beam are from the publications JP 63173852 A, JP 58195074 A and JP 58074875 A are known, one simultaneous focusing at different ignition locations is possible. Between different ignition locations cannot be switched.
- JP 07217521 A, JP 05033755 A and JP 09042138 A Laser ignition devices are shown in which the focal point of a laser beam varies by moving the lens system and thus the ignition location only along the beam axis can be changed. A shift in the ignition location outside the beam axis or simultaneous focusing on different ones Ignition locations are not possible.
- the object of the invention is to avoid these disadvantages and in an internal combustion engine of the type mentioned in the simplest possible way to achieve optimal ignition of the fuel in the combustion chamber.
- the optical device a mirror system arranged in the beam path of the laser beam with at least one, preferably electrically, switchable mirror, so that the laser beam is optionally at at least two different ones Ignition locations in the combustion chamber can be focused.
- electrical switchable mirrors such as are known from US Pat. No. 5,036,042 A the advantage of shorter response times compared to mechanically switchable mirrors, less space and easier control.
- the mirror has at least two switch positions with different reflection angles and / or has reflection properties. It is particularly cheap if the switchable mirror is optically transparent in a switch position.
- the mirror system is connected upstream of the focusing device.
- the focusing device has a lens system which at least two focal points, preferably with different focal lengths, formed.
- the lens system has at least one collecting lens with special grinding, which several Focuses.
- a particularly high degree of flexibility in controlling the combustion is achieved if the lens system for each switch position of the electrically switchable mirror forms its own focus.
- the laser source preferably formed by a compact solid-state laser can in a simple manner in a shaft in the cylinder head of the internal combustion engine, preferably arranged in the spark plug shaft instead of a spark plug his. This enables simple adaptation to existing engine concepts. By using a very compact solid-state laser Light guide between laser source and mirror system or focusing device omitted.
- the invention is particularly suitable for use with hydrogen as Fuel powered internal combustion engines. Because of the wide ignition limits of air-hydrogen mixtures can be found in conventional spark plugs Ignition devices on the electrodes of the spark plug for reignition come during the intake stroke, which is very detrimental to smooth running such internal combustion engines affects because the combustion for the current and subsequent cycle fails. By using the invention Ignition device in hydrogen-powered internal combustion engines can this disadvantage can be avoided.
- FIG. 1 shows an internal combustion engine 1 with a cylinder head 2 and a cylinder housing 3 in a longitudinal section.
- a back and forth Piston 5 arranged in the cylinder 4 .
- the piston 5 forms with the top surface 6 of the cylinder head 2 a combustion chamber 7, in which the gas exchange channels 8, 9 open.
- an ignition device with a compact solid-state laser Laser source 11 arranged, which a laser beam 12 in the combustion chamber 7 emitted.
- An optical device is located in the beam path of the laser beam 12 30 for beam deflection and / or beam splitting by means of the laser beam 12 can be focused at two different ignition locations 14, 15. Via a focusing device 13, which is part of the optical device 30 for Is beam deflection and / or beam splitting, the laser beam 12 is focused.
- the optical Device 30 has a mirror system 16, which is located between laser source 11 and the focusing device 13 is arranged and at least one electrically switchable mirror 17 with at least two reflection switch positions A, B includes.
- the mirror 17 In the switch position A shown in FIG. 2, the mirror 17 is transparent switched so that the laser beam 12 is deflected onto the focusing device 13 hits and is focused on a first ignition location 14.
- the reflected laser beam 12 meets a second, rigid mirror 18 and becomes Focusing device 13 deflected.
- Focusing device 13 deflected.
- the focusing device 13 includes a lens system 13a, which for each Switch position A, B of the mirror 17 has a lens 19, 20.
- the lenses 19, 20 can be designed with different focal lengths, whereby ignition locations 14, 15 at different distances from the top surface 6 can be realized.
- the mirror 17 is controlled as a function of the engine operating state or the combustion process in the combustion chamber 7.
- an optical sensor 21 can be placed in the focusing device 13 can be integrated.
- Fig. 5 shows an embodiment in which the focusing device 13 Has lens system, which is formed by a lens 22 with a special cut which focuses the incident laser beam 12 in two ignition locations 14, 15.
- the lens 22 has at least two lens parts 23, 24 with different ones Focal points and focal lengths.
- a lens 22 with a special cut can also be in the embodiment shown in FIGS. 1 to 4 instead of the individual lenses 19, 20 are used.
- the switchable Mirror 17 switched between two ignition locations 14, 15.
- At the in 5 shows a single laser beam 12 in two different ignition locations 14, 15 are focused simultaneously.
- each of the two lenses 19, 20 of the embodiment variant described in FIGS. 1 to 4 be formed by a lens 22 with a special cut, so that in each of the two switching positions A, B of the mirror 17 each have two focal points can be realized with different focal lengths.
- the ignition device described is particularly suitable for use with Hydrogen powered internal combustion engines. Due to the lack of electrodes A spark plug can reliably avoid reignitions.
- the optical system described can also be used for combustion diagnosis be, for example the time interval between the ignition pulse and the ignition by the optical sensor 21 determined and for further Motor control is used. This makes it possible, for example, unequal Ignition delays in different cylinders of a multi-cylinder internal combustion engine to compensate and thus achieve better synchronization.
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- 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)
Abstract
Description
- Fig. 1
- eine Brennkraftmaschine mit einer erfindungsgemäßen Zündeinrichtung in einem Schnitt durch einen Zylinder,
- Fig. 2
- ein Detail aus Fig. 1 in einer ersten Schaltstellung des Spiegels,
- Fig. 3
- dieses Detail aus Fig. 1 in einer zweiten Schaltstellung des Spiegels,
- Fig. 4
- die Fokussiereinrichtung in einer Draufsicht gemäß der Linie IV-IV in Fig. 2 und 3,
- Fig. 5
- Spiegelsystem und Strahlengang einer erfindungsgemäßen Zündeinrichtung in einem Schnitt analog zu den Fig. 1 bis 3 in einer zweiten Ausführungsvariante.
Claims (9)
- Zündeinrichtung für eine Brennkraftmaschine mit Fremdzündung, wobei die Zündung des Kraftstoffes durch zumindest einen auf einen Zündort (14, 15) in einem Brennraum (7) fokussierten Laserstrahl (12) erfolgt, mit einer Laserquelle (11) und einer Fokussiereinrichtung (15) zur Bereitstellung und Fokussierung des Laserstrahles (12), wobei im Strahlenweg des Laserstrahles (12) eine optische Einrichtung (30) zur Strahlumlenkung und/oder Strahlaufteilung angeordnet ist, mittels der der Laserstrahl (12) an zumindest zwei verschiedenen Zündorten (14, 15) im Brennraumes (7) fokussierbar ist, dadurch gekennzeichnet, dass die optische Einrichtung (30) ein im Strahlenweg des Laserstrahl (12) angeordnetes Spiegelsystem (16) mit zumindest einem, vorzugsweise elektrisch, schaltbaren Spiegel (17) aufweist, so dass der Laserstrahl (12) wahlweise an zumindest zwei verschiedenen Zündorten (14, 15) im Brennraum (7) fokussierbar ist.
- Zündeinrichtung nach Anspruch 1, dadurch gekennzeichnet, dass der Spiegel (17) zumindest zwei Schaltstellungen (A, B) mit unterschiedlichen Reflexionswinkeln und/oder Reflexionseigenschaften aufweist.
- Zündeinrichtung nach Anspruch 2, dadurch gekennzeichnet, dass in einer Schaltstellung (A) der schaltbare Spiegel (17) optisch durchlässig ist.
- Zündeinrichtung nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass das Spiegelsystem (16) der Fokussiereinrichtung (13) vorgeschaltet ist.
- Zündeinrichtung nach einem der Ansprüche 1 bis 4, wobei der Laserstrahl (12) gleichzeitig an zumindest zwei verschiedenen Zündorten (14, 15) im Brennraum (7) fokussierbar ist, dadurch gekennzeichnet, dass die Fokussiereinrichtung (13) ein Linsensystem (13a, 13b) aufweist, welches zumindest zwei Brennpunkte, vorzugsweise mit unterschiedlicher Brennweite, ausbildet.
- Zündeinrichtung nach Anspruch 5, dadurch gekennzeichnet, dass das Linsensystem (13b) zumindest eine Sammellinse mit Spezialschliff mit zumindest zwei Linsenteilen (23, 24) aufweist, welche zumindest zwei Brennpunkte ausbildet.
- Zündeinrichtung nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass für jede Schaltstellung (A, B) des elektrisch schaltbaren Spiegels (17) das Linsensystem (13a, 13b) zumindest einen eigenen Brennpunkt ausbildet.
- Zündeinrichtung nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass die vorzugsweise durch einen kompakten Festkörperlaser gebildete Laserquelle (11) in einem vorzugsweise durch einen Zündkerzenschacht gebildeten Schacht (10) eines Zylinderkopfes (2) angeordnet ist.
- Verwendung einer Zündeinrichtung nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, dass die Brennkraftmaschine mit Wasserstoff als Kraftstoff betrieben wird.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT02450093T ATE303511T1 (de) | 2001-04-23 | 2002-04-18 | Zündeinrichtung für eine brennkraftmaschine mit fremdzündung |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT0031401U AT5307U1 (de) | 2001-04-23 | 2001-04-23 | Brennkraftmaschine mit fremdzündung |
AT3142001U | 2001-04-23 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP1253316A2 true EP1253316A2 (de) | 2002-10-30 |
EP1253316A3 EP1253316A3 (de) | 2004-01-21 |
EP1253316B1 EP1253316B1 (de) | 2005-08-31 |
Family
ID=3487263
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP02450093A Expired - Lifetime EP1253316B1 (de) | 2001-04-23 | 2002-04-18 | Zündeinrichtung für eine Brennkraftmaschine mit Fremdzündung |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP1253316B1 (de) |
AT (2) | AT5307U1 (de) |
DE (1) | DE50204056D1 (de) |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1441124A2 (de) * | 2003-01-16 | 2004-07-28 | GE Jenbacher GmbH & Co. OHG | Verbrennungsmotor |
FR2871856A1 (fr) * | 2004-06-22 | 2005-12-23 | Peugeot Citroen Automobiles Sa | Bougie d'allumage optique |
FR2873763A1 (fr) * | 2004-07-29 | 2006-02-03 | Peugeot Citroen Automobiles Sa | Dispositif d'allumage pour moteur a combustion interne et moteur comportant un tel dispositif |
DE102004053493A1 (de) * | 2004-11-05 | 2006-05-24 | Siemens Ag | Verfahren zum Steuern oder/und Regeln der Laserzündung einer Brennkraftmaschine |
WO2008022924A1 (de) * | 2006-08-22 | 2008-02-28 | Robert Bosch Gmbh | Zündeinrichtung für eine brennkraftmaschine |
EP1985844A1 (de) * | 2007-04-26 | 2008-10-29 | Ngk Spark Plug Co., Ltd | Laserzündvorrichtung und Verbrennungsmotor mit Laserzündung |
DE102008062572A1 (de) * | 2008-12-16 | 2010-06-17 | Ge Jenbacher Gmbh & Co. Ohg | Zündkerze |
US7810462B2 (en) | 2006-07-10 | 2010-10-12 | Robert Bosch Gmbh | Method for operating an ignition device for an internal combustion engine |
JP2011140957A (ja) * | 2011-04-14 | 2011-07-21 | Kawasaki Heavy Ind Ltd | レーザ多点着火装置 |
WO2011085846A1 (de) * | 2009-12-21 | 2011-07-21 | Robert Bosch Gmbh | Laserzündeinrichtung und betriebsverfahren für eine laserzündeinrichtung |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AT412167B (de) * | 2002-10-31 | 2004-10-25 | Ge Jenbacher Gmbh & Co Ohg | Verbrennungsmotor |
Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4314530A (en) | 1980-02-25 | 1982-02-09 | Giacchetti Anacleto D | Amplified radiation igniter system and method for igniting fuel in an internal combustion engine |
JPS5874875A (ja) | 1981-10-29 | 1983-05-06 | Nippon Soken Inc | 内燃機関用レ−ザ点火装置 |
JPS58195074A (ja) | 1982-05-07 | 1983-11-14 | Nippon Denso Co Ltd | 内燃機関の点火装置 |
US4416226A (en) | 1981-06-02 | 1983-11-22 | Nippon Soken, Inc. | Laser ignition apparatus for an internal combustion engine |
JPS63173852A (ja) | 1987-01-12 | 1988-07-18 | Komatsu Ltd | 内燃機関の点火装置 |
US4852529A (en) | 1986-03-07 | 1989-08-01 | Bennett Automotive Technology Pty. Ltd. | Laser energy ignition system |
US5036042A (en) | 1988-12-29 | 1991-07-30 | International Superconductor Corp. | Switchable superconducting mirrors |
JPH07217521A (ja) | 1994-01-28 | 1995-08-15 | Mitsubishi Heavy Ind Ltd | レーザ着火装置 |
DE19911737A1 (de) | 1998-03-24 | 1999-10-07 | Avl List Gmbh | Brennkraftmaschine mit Fremdzündung |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1360196A (en) * | 1971-09-10 | 1974-07-17 | Ass Eng Ltd | Ignition systems |
JPS63253111A (ja) * | 1987-04-09 | 1988-10-20 | Sony Corp | 内燃機関 |
JP4021954B2 (ja) * | 1996-05-17 | 2007-12-12 | 三菱重工業株式会社 | エンジンのレーザ光入射装置 |
-
2001
- 2001-04-23 AT AT0031401U patent/AT5307U1/de not_active IP Right Cessation
-
2002
- 2002-04-18 AT AT02450093T patent/ATE303511T1/de not_active IP Right Cessation
- 2002-04-18 DE DE50204056T patent/DE50204056D1/de not_active Expired - Lifetime
- 2002-04-18 EP EP02450093A patent/EP1253316B1/de not_active Expired - Lifetime
Patent Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4314530A (en) | 1980-02-25 | 1982-02-09 | Giacchetti Anacleto D | Amplified radiation igniter system and method for igniting fuel in an internal combustion engine |
US4416226A (en) | 1981-06-02 | 1983-11-22 | Nippon Soken, Inc. | Laser ignition apparatus for an internal combustion engine |
JPS5874875A (ja) | 1981-10-29 | 1983-05-06 | Nippon Soken Inc | 内燃機関用レ−ザ点火装置 |
JPS58195074A (ja) | 1982-05-07 | 1983-11-14 | Nippon Denso Co Ltd | 内燃機関の点火装置 |
US4852529A (en) | 1986-03-07 | 1989-08-01 | Bennett Automotive Technology Pty. Ltd. | Laser energy ignition system |
JPS63173852A (ja) | 1987-01-12 | 1988-07-18 | Komatsu Ltd | 内燃機関の点火装置 |
US5036042A (en) | 1988-12-29 | 1991-07-30 | International Superconductor Corp. | Switchable superconducting mirrors |
JPH07217521A (ja) | 1994-01-28 | 1995-08-15 | Mitsubishi Heavy Ind Ltd | レーザ着火装置 |
DE19911737A1 (de) | 1998-03-24 | 1999-10-07 | Avl List Gmbh | Brennkraftmaschine mit Fremdzündung |
Cited By (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7231897B2 (en) | 2003-01-16 | 2007-06-19 | Ge Jenbacher Gmbh & Co Ohg | Combustion engine |
EP1441124A2 (de) * | 2003-01-16 | 2004-07-28 | GE Jenbacher GmbH & Co. OHG | Verbrennungsmotor |
EP1441124A3 (de) * | 2003-01-16 | 2006-07-19 | GE Jenbacher GmbH & Co. OHG | Verbrennungsmotor |
FR2871856A1 (fr) * | 2004-06-22 | 2005-12-23 | Peugeot Citroen Automobiles Sa | Bougie d'allumage optique |
FR2873763A1 (fr) * | 2004-07-29 | 2006-02-03 | Peugeot Citroen Automobiles Sa | Dispositif d'allumage pour moteur a combustion interne et moteur comportant un tel dispositif |
DE102004053493B4 (de) * | 2004-11-05 | 2007-08-09 | Siemens Ag | Verfahren zum Steuern oder/und Regeln der Laserzündung einer Brennkraftmaschine |
DE102004053493A1 (de) * | 2004-11-05 | 2006-05-24 | Siemens Ag | Verfahren zum Steuern oder/und Regeln der Laserzündung einer Brennkraftmaschine |
US7810462B2 (en) | 2006-07-10 | 2010-10-12 | Robert Bosch Gmbh | Method for operating an ignition device for an internal combustion engine |
WO2008022924A1 (de) * | 2006-08-22 | 2008-02-28 | Robert Bosch Gmbh | Zündeinrichtung für eine brennkraftmaschine |
EP1985844A1 (de) * | 2007-04-26 | 2008-10-29 | Ngk Spark Plug Co., Ltd | Laserzündvorrichtung und Verbrennungsmotor mit Laserzündung |
DE102008062572A1 (de) * | 2008-12-16 | 2010-06-17 | Ge Jenbacher Gmbh & Co. Ohg | Zündkerze |
WO2011085846A1 (de) * | 2009-12-21 | 2011-07-21 | Robert Bosch Gmbh | Laserzündeinrichtung und betriebsverfahren für eine laserzündeinrichtung |
JP2011140957A (ja) * | 2011-04-14 | 2011-07-21 | Kawasaki Heavy Ind Ltd | レーザ多点着火装置 |
Also Published As
Publication number | Publication date |
---|---|
DE50204056D1 (de) | 2005-10-06 |
AT5307U1 (de) | 2002-05-27 |
EP1253316A3 (de) | 2004-01-21 |
ATE303511T1 (de) | 2005-09-15 |
EP1253316B1 (de) | 2005-08-31 |
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