EP2732149B1 - Bougie d'allumage laser et procédé de nettoyage de cette dernière - Google Patents

Bougie d'allumage laser et procédé de nettoyage de cette dernière Download PDF

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Publication number
EP2732149B1
EP2732149B1 EP12724610.6A EP12724610A EP2732149B1 EP 2732149 B1 EP2732149 B1 EP 2732149B1 EP 12724610 A EP12724610 A EP 12724610A EP 2732149 B1 EP2732149 B1 EP 2732149B1
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EP
European Patent Office
Prior art keywords
spark plug
laser spark
region
channel
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.)
Not-in-force
Application number
EP12724610.6A
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German (de)
English (en)
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EP2732149A1 (fr
Inventor
Martin Weinrotter
Pascal Woerner
Joerg Engelhardt
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Robert Bosch GmbH
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Robert Bosch GmbH
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Publication of EP2732149A1 publication Critical patent/EP2732149A1/fr
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Not-in-force 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
    • 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
    • F02B5/00—Engines characterised by 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
    • F02P13/00—Sparking plugs structurally combined with other parts of internal-combustion engines
    • 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49229—Prime mover or fluid pump making

Definitions

  • the invention relates to a laser spark plug, in particular for an internal combustion engine, having a combustion chamber window through which laser radiation can be emitted from an interior of the laser spark plug into an external space, wherein the laser spark plug has a component which at least partially surrounds the beam path of the laser radiation in the region of the exterior space.
  • Such a laser spark plug is for example from the EP 2 072 803 A1 known.
  • the invention further relates to a cleaning method for such a laser spark plug.
  • the laser spark plug in the region of the component has at least one channel having at least two opening portions and a fluid communication between the opening portions allows a first opening portion in the region of an outer surface of the combustion chamber window and a second
  • Opening portion in a radially outer region of the laser spark plug, in particular the component is arranged.
  • the channel according to the invention particularly advantageously enables an efficient loading of the outer surface of the combustion chamber window with a fluid, for example a cleaning solution or the like.
  • a fluid for example a cleaning solution or the like.
  • the channel according to the invention advantageously also allows targeted introduction of the cleaning fluid into the region of the laser spark plug to be cleaned.
  • a longitudinal axis of at least one first longitudinal section of the channel arranged in the region of the first opening section essentially points to a radially inner region of an outer surface of the combustion chamber window, whereby a selective introduction is effected regardless of a spatial arrangement of the second opening section of the channel a cleaning fluid to the optically active region of the combustion chamber window is made possible.
  • a flow direction of a cleaning fluid introduced through the channel can advantageously be determined or influenced by the longitudinal axis of the first longitudinal section, in particular its orientation.
  • the longitudinal axis of the first longitudinal section is aligned such that an intersection of the longitudinal axis with the outer surface of the combustion chamber window is at a distance from the optical axis of the laser spark plug, which is at least approximately 20% of a radiation cross section of the laser radiation in the region the outer surface is preferably at least about 40%.
  • a particularly efficient cleaning of the outer surface of the combustion chamber window is made possible in that surface region through which laser radiation provided by the laser spark plug passes into the outer space.
  • At least a second longitudinal section of the channel has a diameter of 0.5 mm to about 4.0 mm, in particular from about 1.0 mm to about 2.0 mm.
  • This configuration of the channel allows optimal loading of the Combustion chamber window with pressurized cleaning fluid, wherein the cleaning fluid in particular with a comparatively high pulse (high pressure, high speed) is radiated to the combustion chamber window and thus cleans this.
  • the channel according to the invention can advantageously also be used for wetting with cleaning fluid which, for example, has a relatively low pressure.
  • a mechanical cleaning for example with a brush or a cotton swab or the like through the channel can be performed.
  • a first longitudinal section of the channel arranged in the region of the first opening section has a diameter of approximately 0.1 mm to approximately 2.0 mm, in particular from approximately 0.2 mm to approximately 1.0 mm ,
  • the channel according to the invention has different length sections, each with different cross-sectional openings or diameters, a nozzle effect can advantageously be achieved for a cleaning fluid flowing through the channel, whereby the momentum of the detergent flow directed onto the combustion chamber window can be advantageously influenced.
  • the channel is designed so that it can be temporarily locked so that no fluid communication between the first and the second opening portion is possible.
  • the channel advantageously has, at least in sections, an internal thread into which a grub screw can be screwed.
  • the channel can be formed at least in sections as a stepped bore, so that a particularly cost-effective production of the laser spark plug according to the invention is possible.
  • the channel according to the invention may also have a more complex geometry.
  • the channel does not necessarily have a substantially cylindrical shape but may for example also have one or more curved lengths, whereby a directional deflection of the cleaning fluid is possible.
  • the laser spark plug in a radially outer region fastening means for mechanical connection with a target system, namely an external thread, for example for screwing into a corresponding internal thread of a cylinder head of an internal combustion engine.
  • the second opening section lies in the region of the fastening means. It follows in particular that the second opening section is closed in an installed position of the laser spark plug in the target system. This advantageously ensures that the radially arranged on the outside of the laser spark plug second opening portion in the installed position of the laser spark plug has no direct connection to a combustion chamber of the internal combustion engine, in which the laser spark plug protrudes in its installed position.
  • the component which at least partially surrounds the beam path of the laser radiation in the region of the outer space can be formed, for example, as a diaphragm and / or as an antechamber.
  • the component in question complicates the accessibility to the outer surface of the combustion chamber window, so that the cleaning of the combustion chamber window using the channel according to the invention is particularly useful.
  • the channel can be at least partially integrated in the diaphragm or an antechamber wall.
  • FIG. 1 schematically shows a laser-based ignition system of an internal combustion engine, in which a laser spark plug 100 is arranged in the region of a cylinder head of the internal combustion engine, that a combustion chamber facing end portion of the laser spark plug 100 protrudes in a conventional manner into the combustion chamber 200 of the internal combustion engine.
  • the laser spark plug 100 is supplied with optical radiation via pumping radiation 22, which is provided by a pumping light source 20.
  • the laser spark plug 100 can, for example, have an integrated, passively Q-switched solid-state laser 102, which generates high-energy laser ignition pulses in a manner known per se when exposed to the pump light of the pump light source 20.
  • a focusing optics 104 for focusing the generated laser radiation onto an ignition point ZP located in the pre-chamber 120a.
  • the ignition point ZP directly in the combustion chamber.
  • an interior of the laser spark plug 100 is delimited by a combustion chamber window 106 toward the prechamber 120a, through which the laser radiation L is transmitted.
  • FIG. 2 shows a detail view of a combustion chamber-facing end portion of a laser spark plug according to an embodiment of the present invention.
  • the laser spark plug has similar to the schematic illustration according to FIG. 1 via an antechamber 120a into which laser radiation L for igniting an air / fuel mixture located in the prechamber 120a can be injected through the combustion chamber window 106.
  • the laser spark plug according to FIG. 2 an aperture 120b, also referred to as a "light path" element.
  • the diaphragm 120b by virtue of its presently approximately frusto-conical opening, on the one hand enables the prechamber 120a to be exposed to laser radiation L from the in FIG. 2
  • protection of the outer surface 106a of the combustion chamber window 106 from dirt particles from the antechamber 120a is provided because the aperture 120b shields the outer surface 106a of the combustion chamber window 106 at least in certain areas.
  • the pre-chamber 120a of in FIG. 2 The illustrated laser spark plug also has so-called transfer ports 120a 'which provide fluid communication between the pre-chamber 120a and the surrounding space 200, for example, the combustion chamber 200 of the internal combustion engine, allow.
  • the combustion chamber window 106 in particular the outer surface 106a, can only be cleaned by introducing a cleaning fluid through the overflow channels 120a 'into the interior of the prechamber 120a and through the opening of the aperture 120b onto the outer surface 106a of the Combustion window 106 occurs.
  • the cleaning of conventional laser spark plugs with prechamber or diaphragm is complex and has only a relatively small effect.
  • the laser spark plug has at least one channel 122 which has at least two opening sections 122a, 122b and permits fluid communication between the opening sections 122a, 122b.
  • a first opening section 122a of the channel 122 is arranged in the region of the outer surface 106a of the combustion chamber window 106, and a second opening section 122b of the channel 122 is located in a radially outer region of the laser spark plug 100, in particular the aperture 120b or the pre-chamber 120a , is arranged.
  • a cleaning fluid to be introduced into the channel 122 from the outside, which is conducted through the channel 122 directly to the surface area 106a of the combustion chamber window 106 to be cleaned.
  • a fluid transport of cleaning fluid from the outer space 200 or the radially outer region of the pre-chamber 120a through the channel 122 to the outer surface 106a of the combustion chamber window 106 takes place.
  • Cleaning fluid rebounding from the outer surface 106a can advantageously leave the laser spark plug or the prechamber 120a through the overflow passages 120a '.
  • At least two channels 122 according to the invention are provided, wherein at least one first channel 122 can be used to supply cleaning fluid to the combustion chamber window 106, while at least one further channel (not shown) thereto is used to remove the supplied cleaning fluid from the region of the prechamber 120 a in the outer space 200.
  • the channel 122 according to the invention may also have more than two opening portions and thus, for example, a Y-shaped branch (not shown) and the like, wherein at least two opening portions 122a, 122b are arranged as described above, for easy cleaning of the combustion chamber window 106 from outside the To enable laser spark plug 100.
  • a longitudinal axis of at least one arranged in the region of the first opening portion 122 a first length portion LA1 of the channel 122 substantially to a radially inner region B1 of the outer surface 106a of the combustion chamber window 106 indicates, so that an efficient loading of the combustion chamber window 106 with the cleaning fluid is possible.
  • the longitudinal axis of the first longitudinal section LA1 is aligned so that an intersection of the longitudinal axis with the outer surface 106a of the combustion chamber window 106 is a distance Y (FIG. FIG. 2 ) to the optical axis OA of the laser spark plug 100, which is at least about 20% of a beam cross section of the laser radiation L in the region of the outer surface 106a, preferably at least about 40%.
  • This essentially off-centering of the combustion chamber window 106 results in a particularly good cleaning effect.
  • At least a second length section LA2 of the channel 122 has a diameter Z2 of about 0.5 mm to about 4.0 mm, in particular from about 1.0 mm to about 2.0 mm.
  • the longitudinal section LA1 of the channel 122 arranged in the region of the first opening section 122a has a diameter Z1 of approximately 0.1 mm to approximately 2.0 mm, in particular from approximately 0.2 mm to approximately 1.0 mm, has.
  • FIG. 3 shows a further embodiment of the laser spark plug according to the invention, in which the laser spark plug is not provided with an antechamber 120a (FIG. FIG. 2 ), but only with an aperture 120b is equipped. Also in this variant of the invention, at least one channel 122 may be provided for impinging the outer surface 106a of the combustion chamber window 106 with cleaning fluid. How out FIG. 3 As can be seen, the diaphragm 120b may also be formed integrally with the housing 100 'of the laser spark plug.
  • FIG. 4 shows a laser spark plug 100 according to the invention with the channel 122 according to the invention, which is also referred to as flushing channel due to its suitability for cleaning the laser spark plug 100 and its combustion chamber window 106, and one around the combustion chamber facing end portion of the laser spark plug 100 arranged cleaning device 300.
  • the cleaning device 300 has an inflow Z for supplying cleaning fluid, which is passed via the inlet Z in an annular groove R.
  • the cleaning device 300 is mechanically connectable to the laser spark plug 100 such that fluid communication can also be established between the annular groove R and the flushing channel 122 according to the invention, cf. FIG. 4 , As a result, the cleaning fluid supplied to the cleaning device 300 can pass from the inflow Z via the annular groove R into the flushing channel 122 and thus onto the outer surface of the combustion chamber window 106.
  • a return flow of the cleaning fluid applied to the combustion chamber window 106 may occur at the in FIG. 4 imaged configuration through the overflow channels of the pre-chamber to the outflow A of the cleaning device 300 done.
  • the fluid used can be filtered, pressurized again and fed back to the inlet Z, so that advantageously results in a cycle for the cleaning fluid.
  • the cleaning device 300 may advantageously also comprise means for temperature control, in particular heating, of the cleaning fluid, as a result of which a cleaning time can be shortened.
  • the heating may advantageously be configured so that the cleaning fluid is not heated to its boiling point or even to a maximum of a predeterminable limit of about 50 ° C in order to avoid burns when handling the device 300.
  • FIG. 5 As already mentioned, a detailed view of a combustion chamber-facing end region of a laser spark plug 100 according to the invention is shown.
  • a first longitudinal section LA1 of the channel 122 according to the invention is as shown FIG. 5 can be seen aligned so that it is substantially on a radially inner, central region of the outer surface 106a of the combustion chamber window 106, whereby a precise loading of the optically active outer surface of the combustion chamber window 106 is possible with the cleaning fluid.
  • first longitudinal section LA1 has a smaller diameter than at least one further second longitudinal section LA2 adjoining it in the axial direction of the channel 122, a nozzle effect for fluid flowing through the channel 122 can be effected in a manner known per se, so that a speed of the can be influenced on the combustion chamber window 106 incoming cleaning fluid.
  • first longitudinal section LA1 has a first diameter Z1
  • second longitudinal section LA2 has a second diameter Z2> Z1.
  • FIG. 5 illustrated configuration of the channel 122 can be advantageously carried out as a stepped bore, whereby a particularly favorable production of the laser spark plug according to the invention or its housing 100 'is possible.
  • the outer opening or the outer opening section 122b of the channel 122 is arranged in the region of an external thread 108 with which the laser spark plug 100 can be screwed into a cylinder head. This advantageously ensures that the channel 122 is sealed to an environment while the laser spark plug 100 is screwed into the cylinder head.
  • an internal thread 122 c may be provided in the channel 122, in which a grub screw is screwed to seal the channel 122.
  • the angle ⁇ of the channel 122 or at least its combustion chamber window 106 facing end portion or its longitudinal axis LA1 is advantageously selected so that an intersection of the respective longitudinal axis with the outer surface 106a of the combustion chamber window 106 a distance Y to the optical axis OA and the Beam path S of the laser spark plug 100 occupies that is at least about 20% of a beam cross section of the laser radiation L in the region of the outer surface 106a, see. the reference symbol S 'in FIG FIG. 5 , preferably at least about 40%, whereby a particularly efficient cleaning is given.
  • the distance between an intersection of the outer edge of the channel 122 in the region 122a with the combustion chamber window 106 from the optical axis OA or the beam path S may be so large that corresponds to the laser beam radius on the outer surface 106a or at least about 75% thereof , see. the reference Y 'in FIG. 5 ,
  • the cleaning fluid can advantageously according to the invention with a hose or a lance, which can be screwed directly or with a flange into an internal thread of the flushing channel 122, are introduced. As already described, the cleaning fluid can then emerge from the "light path" element 120b or the overflow channels 120a 'from the laser spark plug or its prechamber.
  • the channel 122 having at least two different cross-sections, it can be advantageously ensured that when using a lance inserted into the channel 122 from the outside, the lance can not be inserted so deeply into the channel 122 that it contacts comes with the combustion chamber window 106. In addition, this allows an exact determination of the position of the lance can be achieved.
  • a weak, aqueous acid may be provided, for example an aqueous solution of acetic acid, in particular a 30% acetic acid solution.
  • the cleaning fluid may alternatively contain between about 10% and about 80%, preferably between about 15% and about 50% acetic acid (C 2 H 4 O 2 ) diluted in water (H 2 O).
  • aqueous acids which are so weak or diluted so that they do not attack the laser spark plug or the combustion chamber window 106 itself, are also possible, especially if they are oil pockets such as For example, calcium sulfate (anhydride) or calcium phosphate compounds can dissolve.
  • FIG. 6 shows a simplified flowchart of an embodiment of the method according to the invention.
  • a lance (not shown) is introduced from outside into the channel 122 (FIG. FIG. 1 ) to supply the channel 122 with a cleaning fluid.
  • the cleaning fluid is injected under pressure from the lance into the channel 122 and finally onto the combustion chamber window 106 and through the conical opening of the diaphragm 120b (FIG. FIG. 5 ) or the transfer ports 120a 'from the laser spark plug 100 and the interior I' of the prechamber 120a discharged.
  • step 410 may also be advantageously carried out at least one further step, for.
  • neutral liquid e.g. pure water, alcohol (ethanol), isopropanol to protect the candle from corrosion.
  • Advantageous is a fast-drying liquid that evaporates without residue.

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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)
  • Lasers (AREA)
  • Fuel-Injection Apparatus (AREA)
  • Ignition Installations For Internal Combustion Engines (AREA)

Claims (13)

  1. Bougie d'allumage à laser (100), notamment pour un moteur à combustion interne, comprenant une fenêtre de chambre de combustion (106) à travers laquelle le rayonnement laser (L) peut être rayonné depuis un espace intérieur (I) dans un espace extérieur (A) à travers la bougie d'allumage à laser (100), la bougie d'allumage à laser (100) possédant un composant (120a, 120b) qui entoure au moins partiellement le trajet de rayon (S) du rayonnement laser (L) dans la zone de l'espace extérieur (A), caractérisée en ce que la bougie d'allumage à laser (100) possède dans la zone du composant (120a, 120b) au moins un canal (122), lequel possède au moins deux portions d'ouverture (122a, 122b) et permet une communication fluidique entre les portions d'ouverture (122a, 122b), une première portion d'ouverture (122a) étant disposée dans la zone d'une surface extérieure (106a) de la fenêtre de chambre de combustion (106) et une deuxième portion d'ouverture (122b) dans une zone extérieure radiale de la bougie d'allumage à laser (100), notamment du composant (120a, 120b), et le canal (122) possédant au moins dans certaines portions un filetage intérieur (122c) destiné à accueillir une vis sans tête.
  2. Bougie d'allumage à laser (100), notamment pour un moteur à combustion interne, comprenant une fenêtre de chambre de combustion (106) à travers laquelle le rayonnement laser (L) peut être rayonné depuis un espace intérieur (I) dans un espace extérieur (A) à travers la bougie d'allumage à laser (100), la bougie d'allumage à laser (100) possédant un composant (120a, 120b) qui entoure au moins partiellement le trajet de rayon (S) du rayonnement laser (L) dans la zone de l'espace extérieur (A), caractérisée en ce que la bougie d'allumage à laser (100) possède dans la zone du composant (120a, 120b) au moins un canal (122), lequel possède au moins deux portions d'ouverture (122a, 122b) et permet une communication fluidique entre les portions d'ouverture (122a, 122b), une première portion d'ouverture (122a) étant disposée dans la zone d'une surface extérieure (106a) de la fenêtre de chambre de combustion (106) et une deuxième portion d'ouverture (122b) dans une zone extérieure radiale de la bougie d'allumage à laser (100), notamment du composant (120a, 120b), et la bougie d'allumage à laser (100) possédant dans une zone extérieure radiale un filetage extérieur (108) et en ce que la deuxième portion d'ouverture (122b) se trouve dans la zone du filetage extérieur.
  3. Bougie d'allumage à laser (100) selon la revendication 1 ou 2, un axe longitudinal d'au moins une portion longitudinale (LA1) du canal (122), disposée dans la zone de la première portion d'ouverture (122a), étant dirigé pour l'essentiel sur une zone (B1) intérieure dans le sens radial d'une surface extérieure (106a) de la fenêtre de chambre de combustion (106).
  4. Bougie d'allumage à laser (100) selon la revendication 3, l'axe longitudinal de la première portion longitudinale (LA1) étant orienté de telle sorte qu'un point d'intersection de l'axe longitudinal avec la surface extérieure (106a) de la fenêtre de chambre de combustion (106) présente un écart (Y) par rapport à l'axe optique (OA) de la bougie d'allumage à laser (100), lequel est égal à au moins 20 pourcent environ d'une section transversale de rayon du rayonnement laser (L) dans la zone de la surface extérieure (106a).
  5. Bougie d'allumage à laser (100) selon la revendication 3, l'axe longitudinal de la première portion longitudinale (LA1) étant orienté de telle sorte qu'un point d'intersection de l'axe longitudinal avec la surface extérieure (106a) de la fenêtre de chambre de combustion (106) présente un écart (Y) par rapport à l'axe optique (OA) de la bougie d'allumage à laser (100), lequel est égal à au moins 40 pourcent environ d'une section transversale de rayon du rayonnement laser (L) dans la zone de la surface extérieure (106a).
  6. Bougie d'allumage à laser (100) selon l'une des revendications précédentes, au moins une deuxième portion longitudinale (LA2) du canal (122) un diamètre (Z2) d'environ 0,5 mm à environ 4,0 mm.
  7. Bougie d'allumage à laser (100) selon l'une des revendications précédentes, au moins une deuxième portion longitudinale (LA2) du canal (122) un diamètre (Z2) d'environ 1,0 mm à environ 2,0 mm.
  8. Bougie d'allumage à laser (100) selon l'une des revendications précédentes, une ou la première portion longitudinale (LA1) du canal (122) qui est disposée dans la zone de la première portion d'ouverture (122a) présentant un diamètre (Z2) d'environ 0,1 mm à environ 2,0 mm.
  9. Bougie d'allumage à laser (100) selon l'une des revendications précédentes, une ou la première portion longitudinale (LA1) du canal (122) qui est disposée dans la zone de la première portion d'ouverture (122a) présentant un diamètre (Z2) d'environ 0,2 mm à environ 1,0 mm.
  10. Bougie d'allumage à laser (100) selon l'une des revendications précédentes, le canal (122) étant réalisé sous la forme d'un alésage étagé, au moins dans certaines portions.
  11. Bougie d'allumage à laser (100) selon l'une des revendications précédentes, le composant (120a, 120b) étant un obturateur et/ou une préchambre.
  12. Procédé de nettoyage d'une bougie d'allumage à laser (100) selon l'une des revendications précédentes, caractérisé en ce que la deuxième portion d'ouverture (122b) est soumise à un fluide de nettoyage et/ou à des ultrasons.
  13. Procédé selon la revendication 12, une lance étant introduite au moins partiellement dans la deuxième portion d'ouverture (122b) en vue d'acheminer le fluide de nettoyage et/ou les ultrasons.
EP12724610.6A 2011-07-13 2012-05-29 Bougie d'allumage laser et procédé de nettoyage de cette dernière Not-in-force EP2732149B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102011079043A DE102011079043A1 (de) 2011-07-13 2011-07-13 Laserzündkerze und Reinigungsverfahren hierfür
PCT/EP2012/059957 WO2013007439A1 (fr) 2011-07-13 2012-05-29 Bougie d'allumage laser et procédé de nettoyage de cette dernière

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EP2732149A1 EP2732149A1 (fr) 2014-05-21
EP2732149B1 true EP2732149B1 (fr) 2017-03-01

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US (1) US9982651B2 (fr)
EP (1) EP2732149B1 (fr)
JP (1) JP6021907B2 (fr)
DE (1) DE102011079043A1 (fr)
WO (1) WO2013007439A1 (fr)

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DE102011079017A1 (de) * 2011-07-12 2013-01-17 Robert Bosch Gmbh Verfahren und Vorrichtung zum Betreiben einer Laserzündkerze
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EP3045715A1 (fr) 2015-01-16 2016-07-20 Caterpillar Energy Solutions GmbH Ensemble chambre de précombustion à allumage laser
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WO2013007439A1 (fr) 2013-01-17
US9982651B2 (en) 2018-05-29
JP2014523995A (ja) 2014-09-18
EP2732149A1 (fr) 2014-05-21
US20140305394A1 (en) 2014-10-16
JP6021907B2 (ja) 2016-11-09
DE102011079043A1 (de) 2013-01-17

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