[go: up one dir, main page]

WO2008017601A1 - Bougie pour allumage plasma haute fréquence - Google Patents

Bougie pour allumage plasma haute fréquence Download PDF

Info

Publication number
WO2008017601A1
WO2008017601A1 PCT/EP2007/057809 EP2007057809W WO2008017601A1 WO 2008017601 A1 WO2008017601 A1 WO 2008017601A1 EP 2007057809 W EP2007057809 W EP 2007057809W WO 2008017601 A1 WO2008017601 A1 WO 2008017601A1
Authority
WO
WIPO (PCT)
Prior art keywords
electrode
ignition device
ignition
frequency plasma
dielectric layer
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/EP2007/057809
Other languages
German (de)
English (en)
Inventor
Georg Bachmaier
Robert Baumgartner
Reinhard Freitag
Thomas Hammer
Oliver Hennig
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.)
Siemens AG
Siemens Corp
Original Assignee
Siemens AG
Siemens Corp
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 Siemens AG, Siemens Corp filed Critical Siemens AG
Publication of WO2008017601A1 publication Critical patent/WO2008017601A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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
    • F02P9/00—Electric spark ignition control, not otherwise provided for
    • F02P9/002—Control of spark intensity, intensifying, lengthening, suppression
    • F02P9/007—Control of spark intensity, intensifying, lengthening, suppression by supplementary electrical discharge in the pre-ionised electrode interspace of the sparking plug, e.g. plasma jet 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01T—SPARK GAPS; OVERVOLTAGE ARRESTERS USING SPARK GAPS; SPARKING PLUGS; CORONA DEVICES; GENERATING IONS TO BE INTRODUCED INTO NON-ENCLOSED GASES
    • H01T13/00—Sparking plugs
    • H01T13/20—Sparking plugs characterised by features of the electrodes or insulation
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01T—SPARK GAPS; OVERVOLTAGE ARRESTERS USING SPARK GAPS; SPARKING PLUGS; CORONA DEVICES; GENERATING IONS TO BE INTRODUCED INTO NON-ENCLOSED GASES
    • H01T13/00—Sparking plugs
    • H01T13/20—Sparking plugs characterised by features of the electrodes or insulation
    • H01T13/39—Selection of materials for electrodes

Definitions

  • the present invention relates to an ignition device for high-frequency plasma ignition according to the features of the preamble of claim 1.
  • a known ignition possibility which offers these features, is the high-frequency plasma ignition, as described for example in DE 10 2004 058 925. This is a
  • Resonant circuit or resonator consisting of a coil inductively and a capacitance by a high-frequency source resonantly excited until the capacitance representing electrodes ignites a high-frequency plasma.
  • the design used so far is based on the conventional spark plug, i. it consists of an outer ground electrode connected to the screwed connection and an insulated central rod electrode. The coupling of higher energy at the same boundary conditions leads to a greatly increased electrode wear. A resulting shorter service life compared to conventional ignition systems is disadvantageous for series production in motor vehicles.
  • the insulating dielectric layer on at least one of the electrodes by preventing a direct current flow, ensures that no narrowly defined bases of the plasma flashover can form, but that the electrical power in the plasma boundary layer is distributed over a larger area. While e.g. a positive half cycle of the exciting resonant frequency voltage drift electrons on the dielectric layer of the electrode of positive polarity. This loads the
  • the electrical power is coupled into the plasma flashover exclusively capacitive high frequency. Are both electrodes, both the primary electrode and the secondary electrode covered with a dielectric layer, so occurs in neither of them erosion of the electrode surfaces and thus only reduced wear.
  • the thickness of the dielectric layer decreases to a combustion chamber-side electrode tip of the primary electrode and / or the secondary electrode.
  • the distance of the plasma flashover between the primary electrode and the secondary electrode or the respective surface of the dielectric layer can increase to a combustion chamber-side electrode tip of the primary electrode and the secondary electrode.
  • Dielectric layer in this area then ensures that the plasma flashover moves very quickly in areas larger rollover distance or spread and thereby increases in power.
  • the propagation of the plasma flashover into a combustion chamber is promoted, and it is ensured that the plasma power is deposited to a large extent in the region of the electrode tips in the combustion chamber. This process is advantageously assisted as the thickness of the dielectric layer decreases toward the electrode tips, increasing the local capacitance.
  • the thickness of the dielectric layer may be between 1/10 mm and a few mm.
  • the surface of the dielectric-coated primary electrode and / or secondary electrode is up to max. about 10 mm 2 .
  • the capacity can be adjusted to the necessary values for the ignition of the high-frequency plasma and the required power so that a plasma flashover of the desired strength on the other hand, a sufficient dielectric strength of the barrier is given under all operating conditions and there are no breakdowns through the dielectric layer.
  • Typical values are a few to a few 10 mm 2 for the surface of the central high-voltage electrode and a few tenths of a millimeter to a few millimeters for the thickness of the dielectric layer.
  • the secondary electrode may be arranged surrounding the primary electrode.
  • a gap between the primary electrode and the secondary electrode is filled to one or more channels with the dielectric.
  • the secondary electrode may be a cylinder arranged concentrically around the primary electrode.
  • the secondary electrode may be arranged around the primary electrode at different distances.
  • a non-concentric arrangement of a cylinder around the primary electrode is possible.
  • a gap between the outer secondary electrode and the inner primary electrode can be reduced locally to provide preferred conditions for a capacitively coupled radio-frequency plasma discharge.
  • the dielectric is a glass or a ceramic, in particular aluminum oxide, aluminum nitride or boron nitride.
  • FIG. 1A shows in cross section the electrode region of an ignition device according to the invention
  • FIG. 1B shows the electrode area of the ignition device of FIG. 1A in a plan view of the combustion chamber.
  • FIG. 1A shows an embodiment of an ignition device according to the invention in longitudinal section in the region of the electrodes with a primary electrode 1 and a secondary electrode 2, which concentrically surrounds the primary electrode 1 as a cylinder. Between the primary electrode 1 and the secondary electrode 2, a dielectric 3 is arranged. In the region of a primary electrode tip 4 and a secondary electrode tip 5, the dielectric does not fill the gap between primary electrode 1 and secondary electrode 2 and an annular gap 6 remains. In this annular gap 6 and on the primary electrode tip 4, the primary electrode 1 is completely covered with a dielectric layer 7.
  • FIG. 1B shows the electrode area of the ignition device of FIG. 1A with the dielectric layer 7, the annular gap 6 and the secondary electrode tip 5 in a plan view of the combustion chamber.
  • the insulating dielectric layer 7 on the primary electrode 1 ensures that no narrowly defined base point of the plasma flashover on the primary electrode 1 can form.
  • the electrical power is distributed over a larger area. Due to the local charging of the dielectric layer 7, a further charge build-up will take place at no or less charged points of the surface. If it comes to the rollover, it can not come to small foot areas of the plasma flashover, in which the entire Concentrated current flow and in which the electrode material is eroded greatly.
  • the electrical power is coupled into the plasma flashover exclusively capacitive high frequency.
  • FIGS. 1A and 1B show a further embodiment of an ignition device according to the invention in a longitudinal section in the region of the electrodes.
  • FIGS. 1A and 1B corresponding components are provided with the same reference numerals.
  • the primary electrode 1 is from the cylindrical
  • Secondary electrode 2 concentrically surrounded. Between the primary electrode 1 and the secondary electrode 2, the dielectric 3 is arranged, which leaves free the annular gap 6 in the region of the primary electrode tip 4 and the secondary electrode tip 5. In the annular gap 6 and at the
  • Primary electrode tip 4 the primary electrode 1 with the dielectric layer 7 is completely covered.
  • the secondary electrode 2 is also completely covered with a dielectric layer 8 in the region of the secondary electrode tip 5.
  • FIG. 2B shows in combustion chamber side view the electrode area of the ignition device of FIG. 2A with the dielectric layer 7, the annular gap 6 and the dielectric layer 8 above the secondary electrode tip.
  • both the primary electrode 1 and the secondary electrode 2 are covered with the dielectric layers 7, 8, neither of them erosion of the electrode surfaces and thus only reduced wear of the igniter as a whole.
  • FIGS. 3A and 2B show a further embodiment of an ignition device according to the invention in longitudinal section in the region of the electrodes.
  • the components corresponding to FIGS. 1A and 1B are in turn provided with the same reference numerals.
  • the primary electrode 1 and the secondary electrode 2 are concentric with the dielectric 3 provided therebetween arranged.
  • the secondary electrode tip 5 is correspondingly completely covered with the dielectric layer 8, as in the embodiment in FIGS. 2A and 2B.
  • a primary electrode tip 9 has a conically tapering shape, so that a conically widening annular gap 11 remains between a dielectric layer 10 of the primary electrode tip 9 and the dielectric layer 8 of the secondary electrode 2.
  • Fig. 3B shows in combustion chamber side view of the
  • FIGS. 3A and 3B show a further embodiment of an ignition device according to the invention in a longitudinal section in the region of the electrodes.
  • the FIGS. 3A and 3B corresponding components are again provided with the same reference numerals.
  • the primary electrode 1 and the secondary electrode 2 are insulated by the dielectric 3 interposed therebetween.
  • the secondary electrode tip 5 is completely covered with the dielectric layer 8.
  • the primary electrode 1 has a dielectric layer 12 decreasing in thickness to the primary electrode tip 9.
  • the annular gap 11 widens conically.
  • Fig. 4B shows in combustion chamber side view the
  • the reduction of the thickness of the dielectric layer 12 towards the primary electrode tip 4 enhances the rapid propagation of the plasma flashover into regions of greater flashover distance in the conical annular gap 11.
  • FIGS. 1A and 1B show a fifth embodiment of an ignition device according to the invention in longitudinal section in the region of the electrodes.
  • the components corresponding to FIGS. 1A and 1B are in turn provided with the same reference numerals.
  • the primary electrode 1 is surrounded concentrically by the cylindrical secondary electrode 2 and both are completely embedded in an insulating dielectric 13 which also covers the primary electrode tip 4 and the secondary electrode tip 5. Ignition channels 14 are excluded in the dielectric 13.
  • FIG. 5B shows in combustion chamber side view the electrode area of the ignition device of FIG. 5A with the dielectric 13, which contains the primary electrode tip and the
  • the plasma flashover takes place with a greater energy density.
  • the energy density and spatial arrangement of the plasma flashovers at the tip of the ignition device can be influenced in a simple manner.
  • the operation of the described capacitively coupled high frequency ignition devices is similar to that of conventional electrodes equipped with direct current flow, ie, a distinction can be made between the power supply to initiate the plasma flashover and the power supply to maintain a high-power plasma flashover with impedance matching to the resonator upon initiation of the plasma flashover.
  • a further advantage of the dielectric layer ignition devices according to the invention is that they limit the power locally and overall.
  • the current I P i asma is limited by the condition

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Optics & Photonics (AREA)
  • Plasma & Fusion (AREA)
  • Spark Plugs (AREA)
  • Ignition Installations For Internal Combustion Engines (AREA)

Abstract

Dans le cas d'une bougie pour allumage plasma haute fréquence avec une électrode primaire (1) et une électrode secondaire (2), entre lesquelles peut se produire un amorçage d'un arc de plasma, l'électrode primaire (1) et/ou l'électrode secondaire (2) sont entièrement recouvertes d'une couche de diélectrique isolante (7, 8, 10, 12).
PCT/EP2007/057809 2006-08-08 2007-07-30 Bougie pour allumage plasma haute fréquence Ceased WO2008017601A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200610037037 DE102006037037A1 (de) 2006-08-08 2006-08-08 Zündvorrichtung für Hochfrequenzplasmazündung
DE102006037037.6 2006-08-08

Publications (1)

Publication Number Publication Date
WO2008017601A1 true WO2008017601A1 (fr) 2008-02-14

Family

ID=38691810

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2007/057809 Ceased WO2008017601A1 (fr) 2006-08-08 2007-07-30 Bougie pour allumage plasma haute fréquence

Country Status (2)

Country Link
DE (1) DE102006037037A1 (fr)
WO (1) WO2008017601A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8729782B2 (en) 2010-10-28 2014-05-20 Federal-Mogul Ignition Non-thermal plasma ignition arc suppression

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5894526B2 (ja) * 2009-05-04 2016-03-30 フェデラル−モーグル・イグニション・カンパニーＦｅｄｅｒａｌ−Ｍｏｇｕｌ Ｉｇｎｉｔｉｏｎ Ｃｏｍｐａｎｙ コロナ先端絶縁体
DE102009059649B4 (de) * 2009-12-19 2011-11-24 Borgwarner Beru Systems Gmbh HF-Zündeinrichtung
US20150377205A1 (en) * 2014-06-27 2015-12-31 GM Global Technology Operations LLC Internal combustion engine and vehicle
JP6738806B2 (ja) * 2014-10-28 2020-08-12 ノース−ウエスト ユニヴァーシティ 点火プラグ
DE102014222925B4 (de) * 2014-11-11 2023-05-04 Bayerische Motoren Werke Aktiengesellschaft Dielektrisch behinderte Vorkammerzündung
WO2016075361A1 (fr) * 2014-11-12 2016-05-19 Wärtsilä Finland Oy Moteur à gaz à combustion interne à combustion pauvre comportant un dispositif d'allumage à plasma à décharge à barrière diélectrique à l'intérieur d'une pré-chambre de combustion

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB711778A (en) * 1949-06-09 1954-07-14 Bendix Aviat Corp Low-tension sparking plug for internal combustion engines
GB745016A (en) * 1952-10-31 1956-02-15 Lodge Plugs Ltd Improvements in or relating to surface discharge sparking plugs or other igniters
DE19629344A1 (de) * 1996-07-20 1998-01-29 Bremicker Auto Elektrik Vorrichtung zum Zünden eines Brennstoff-Luft-Gemisches
EP1515594A2 (fr) * 2003-09-12 2005-03-16 Renault s.a.s. Système de génération de plasma
EP1594201A1 (fr) * 2004-05-07 2005-11-09 Renault s.a.s. Bougie d'allumage à effet de surface à étincelles multiples
FR2878086A1 (fr) * 2004-11-16 2006-05-19 Renault Sas Bougie a plasma radiofrequence

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB711778A (en) * 1949-06-09 1954-07-14 Bendix Aviat Corp Low-tension sparking plug for internal combustion engines
GB745016A (en) * 1952-10-31 1956-02-15 Lodge Plugs Ltd Improvements in or relating to surface discharge sparking plugs or other igniters
DE19629344A1 (de) * 1996-07-20 1998-01-29 Bremicker Auto Elektrik Vorrichtung zum Zünden eines Brennstoff-Luft-Gemisches
EP1515594A2 (fr) * 2003-09-12 2005-03-16 Renault s.a.s. Système de génération de plasma
EP1594201A1 (fr) * 2004-05-07 2005-11-09 Renault s.a.s. Bougie d'allumage à effet de surface à étincelles multiples
FR2878086A1 (fr) * 2004-11-16 2006-05-19 Renault Sas Bougie a plasma radiofrequence

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8729782B2 (en) 2010-10-28 2014-05-20 Federal-Mogul Ignition Non-thermal plasma ignition arc suppression

Also Published As

Publication number Publication date
DE102006037037A1 (de) 2008-02-14

Similar Documents

Publication Publication Date Title
DE102010045171B4 (de) Zünder zum Zünden eines Brennstoff-Luft-Gemisches in einer Verbrennungskammer, insbesondere in einem Verbrennungsmotor, durch Erzeugen einer Korona-Entladung
WO2008017601A1 (fr) Bougie pour allumage plasma haute fréquence
DE60030121T2 (de) Zwei-mode zündsystem, das reisenden funken zünder verwendet
DE102006037040B4 (de) Brennstoffeinspritzventil mit Zündung
EP0238520B1 (fr) Bougie d'allumage a etincelle glissante
DE3404081C2 (fr)
DE19701752A1 (de) Zündkerze mit einer Magnetfeldeinrichtung zur Erzeugung eines Lichtbogens veränderlicher Länge
DE2709303A1 (de) Zuendkerze
DE102016006350A1 (de) Zündkerze für eine Hochfrequenz-Zündanlage
DE60026841T2 (de) Zündkerze mit vorwärtstreibendem funken und langer lebensdauer und zugehörige zündschaltung
DE102012210391B4 (de) Zündvorrichtung
DE102005036968A1 (de) Plasma-Zündsystem und Verfahren zu dessen Betrieb
DE102010024396B4 (de) Verfahren zum Zünden eines Brennstoff-Luft-Gemisches einer Verbrennungskammer, insbesondere in einem Verbrennungsmotor durch Erzeugen einer Korona-Entladung
EP2847456B1 (fr) Dispositif d'allumage à plasma haute fréquence
DE69700257T2 (de) Zündkerze zur Anwendung in einem Verbrennungsmotor
EP1686684A2 (fr) Générateur de micro-ondes
EP1864377B1 (fr) Generateur de micro-ondes
DE102006037039B4 (de) Hochfrequenz-Zündvorrichtung
WO2008017572A1 (fr) Dispositif d'allumage à haute fréquence pour un allumage à plasma à haute fréquence
DE102014116586A1 (de) Korona-Zündsystem für einen Verbrennungsmotor
DE102014110671A1 (de) Belichtungsanordnung und Verfahren zum Betreiben einer Belichtungsanordnung
DE1147801B (de) Elektrische Zuendvorrichtung, insbesondere Zuendkerze fuer Brennkraftmaschinen
DE102015112217B3 (de) Verfahren zum Steuern einer Koronazündeinrichtung
DE102012110657B3 (de) Koronazündeinrichtung
DE10243272B4 (de) Vorrichtung zum Zünden eines Luft-Kraftstoff-Gemischs in einem Verbrennungsmotor

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 07802420

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

NENP Non-entry into the national phase

Ref country code: RU

122 Ep: pct application non-entry in european phase

Ref document number: 07802420

Country of ref document: EP

Kind code of ref document: A1