EP1732187A1 - Radiofrequenzplasmazündkerze für gesteuerte Zündung von Verbrennungsmotoren - Google Patents

Radiofrequenzplasmazündkerze für gesteuerte Zündung von Verbrennungsmotoren Download PDF

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Publication number
EP1732187A1
EP1732187A1 EP06300557A EP06300557A EP1732187A1 EP 1732187 A1 EP1732187 A1 EP 1732187A1 EP 06300557 A EP06300557 A EP 06300557A EP 06300557 A EP06300557 A EP 06300557A EP 1732187 A1 EP1732187 A1 EP 1732187A1
Authority
EP
European Patent Office
Prior art keywords
wire
winding
mandrel
spark plug
internal combustion
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
Application number
EP06300557A
Other languages
English (en)
French (fr)
Other versions
EP1732187B1 (de
Inventor
Xavier Jaffrezic
André AGNERAY
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.)
Renault SA
Original Assignee
Renault SA
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 Renault SA filed Critical Renault SA
Publication of EP1732187A1 publication Critical patent/EP1732187A1/de
Application granted granted Critical
Publication of EP1732187B1 publication Critical patent/EP1732187B1/de
Anticipated expiration legal-status Critical
Active legal-status Critical Current

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Classifications

    • 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
    • H01T13/50—Sparking plugs having means for ionisation of gap
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
    • H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
    • H01F41/04—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing coils
    • H01F41/06—Coil winding
    • H01F41/098—Mandrels; Formers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/28—Coils; Windings; Conductive connections
    • H01F27/32—Insulating of coils, windings, or parts thereof
    • H01F27/324—Insulation between coil and core, between different winding sections, around the coil; Other insulation structures
    • H01F27/325—Coil bobbins
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/28—Coils; Windings; Conductive connections
    • H01F27/32—Insulating of coils, windings, or parts thereof
    • H01F27/327—Encapsulating or impregnating
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F38/00—Adaptations of transformers or inductances for specific applications or functions
    • H01F38/12—Ignition, e.g. for IC engines
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
    • H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
    • H01F41/04—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing coils
    • H01F41/12—Insulating of windings
    • H01F41/127—Encapsulating or impregnating

Definitions

  • the present invention relates to a radiofrequency plasma plug, of the type comprising a coil which constitutes the inductive part of a high voltage series resonator in the field of radio frequencies.
  • This type of candle is used in particular for the controlled ignition of internal combustion engines, and in particular described in patent applications.
  • FR03-10766 , FR03-10767 and FR03-10768 are used in particular for the controlled ignition of internal combustion engines, and in particular described in patent applications.
  • a spark plug of this type is represented in FIG. 1 and comprises in particular a connection terminal 1, connected to a first end of an inductive winding 2.
  • the second end of the inductive winding 2 is connected to an internal end of the central high voltage electrode. 3.
  • This end is also in contact with an insulating element 4 forming the capacitor of the resonator.
  • the electrodes 3 and 5 are separated by the dielectric material 6 for guiding the sparks between these electrodes. The spark plug is thus used to maintain a high alternating and high frequency voltage between the electrodes 3 and 5.
  • the winding is formed of a single layer of turns of an enameled conductive wire, wound on the mandrel so as to form contiguous turns.
  • the number of turns must be adapted so that the spiral tension to turn always remains lower than the insulation voltage of the enamel coating the wire, the minimum number of turns being otherwise constrained by the voltage service of the high voltage resonator.
  • the coil of the resonator in order to function correctly in high voltage, the coil of the resonator must be molded in the electrical insulating material constituting the insulation sleeve without any inclusion of air bubbles.
  • the enamel insulation of the wire does not always allow good adhesion of this insulating material, which can promote a detachment of the insulating material, causing a rapid degradation of the properties of the resonator.
  • the present invention aims to solve this problem and aims in particular to provide a more efficient and reliable plasma candle.
  • the subject of the invention is a radiofrequency plasma spark plug for the controlled ignition of internal combustion engines, comprising a winding of an electrically conductive wire which constitutes the inductive part of a high voltage series resonator. the field of radio frequencies, the winding being molded in an electrically insulating material, characterized in that the winding is formed of a bare wire wound on an insulating mandrel in non-contiguous turns.
  • a bare wire thus unglazed, makes it possible to use, for the insulating sleeve, insulating materials having strong adhesion capacities on the metals, which thus eliminates the problems of adhesion to the enamel and allows of guarantee that there will be no detachment between the conductive wire and the insulation.
  • the spacing between the turns allows the insulating material of the sleeve to penetrate, during molding, between the turns and up to the mandrel, which was not possible with a coil formed of contiguous turns, where cavities remain. between two contiguous turns and the mandrel. It therefore follows from the invention that the insulating material can completely coat each turn, and even adhere to the surface of the mandrel.
  • the insulating molding material of the sleeve can have electrical insulation properties more satisfactory than those of enamel enamel enamelled son according to the prior art. As a result, the spacing between two adjacent turns can be reduced, since it is no longer conditioned by the thickness of the enamel of each turn.
  • the mandrel is threaded and the son is wound by being placed in the hollow of the thread formed on the mandrel. It is therefore the pitch of the thread that determines the spacing between turns, more precisely the spacing between the threads of two neighboring turns.
  • the shape of the net is adapted according to the diameter of the wire used, so that there is no cavity between the son and the mandrel, which would be for example the case if the wire was placed in a net of triangular section, where a cavity would remain between the angle of the bottom of the net and the wire of circular section.
  • a curved profile thread will thus be used and such that the radius of curvature of the thread root is greater than the radius of the wound thread.
  • a net 10 is formed on the surface of the mandrel 9.
  • the profile of this net is arcuate with a radius of curvature substantially greater than the radius of the wire 11 constituting the winding, so that, for each turn, the wire rests at the bottom of the thread in a linear contact, allowing the insulating molding material to completely embed the wire by fitting during molding, as shown by the arrows F, to the mandrel.
  • the pitch of the thread is predetermined so that the lines of the magnetic field created around a conductive wire by the other adjacent turns do not substantially disturb the flow of current in the section of the wire considered, and for each of the turns of the coil. This finally makes it possible to favorably increase the coefficient of overvoltage of the resonator.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Spark Plugs (AREA)
  • Ignition Installations For Internal Combustion Engines (AREA)
EP06300557A 2005-06-08 2006-06-02 Radiofrequenzplasmazündkerze für gesteuerte Zündung von Verbrennungsmotoren Active EP1732187B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0505802A FR2887083B1 (fr) 2005-06-08 2005-06-08 Bougie a plasma radiofrequence pour l'allumage commande de moteurs a combustion interne

Publications (2)

Publication Number Publication Date
EP1732187A1 true EP1732187A1 (de) 2006-12-13
EP1732187B1 EP1732187B1 (de) 2007-07-18

Family

ID=35539223

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06300557A Active EP1732187B1 (de) 2005-06-08 2006-06-02 Radiofrequenzplasmazündkerze für gesteuerte Zündung von Verbrennungsmotoren

Country Status (5)

Country Link
EP (1) EP1732187B1 (de)
AT (1) ATE367671T1 (de)
DE (1) DE602006000042T2 (de)
ES (1) ES2286812T3 (de)
FR (1) FR2887083B1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2065907A1 (de) * 2007-11-08 2009-06-03 Delphi Technologies, Inc. Spulenanordnung
FR2943724A1 (fr) * 2009-03-24 2010-10-01 Vibro Meter France Generateur d'allumage a haute energie notamment pour turbine a gaz

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2959071B1 (fr) * 2010-04-16 2012-07-27 Renault Sa Bougie d'allumage equipee de moyens de prevention des courts-circuits

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1148522A2 (de) * 2000-04-17 2001-10-24 Nkk Corporation Rauscharmer Reaktor mit niedigrem Verlust
FR2859830A1 (fr) * 2003-09-12 2005-03-18 Renault Sas Bougie de generation de plasma a inductance integree.

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1148522A2 (de) * 2000-04-17 2001-10-24 Nkk Corporation Rauscharmer Reaktor mit niedigrem Verlust
FR2859830A1 (fr) * 2003-09-12 2005-03-18 Renault Sas Bougie de generation de plasma a inductance integree.

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2065907A1 (de) * 2007-11-08 2009-06-03 Delphi Technologies, Inc. Spulenanordnung
FR2943724A1 (fr) * 2009-03-24 2010-10-01 Vibro Meter France Generateur d'allumage a haute energie notamment pour turbine a gaz

Also Published As

Publication number Publication date
DE602006000042D1 (de) 2007-08-30
FR2887083A1 (fr) 2006-12-15
FR2887083B1 (fr) 2007-08-10
DE602006000042T2 (de) 2008-04-17
ES2286812T3 (es) 2007-12-01
EP1732187B1 (de) 2007-07-18
ATE367671T1 (de) 2007-08-15

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