EP0713006A1 - Ignition part for internal combustion engines - Google Patents

Ignition part for internal combustion engines Download PDF

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Publication number
EP0713006A1
EP0713006A1 EP95402506A EP95402506A EP0713006A1 EP 0713006 A1 EP0713006 A1 EP 0713006A1 EP 95402506 A EP95402506 A EP 95402506A EP 95402506 A EP95402506 A EP 95402506A EP 0713006 A1 EP0713006 A1 EP 0713006A1
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EP
European Patent Office
Prior art keywords
housing
voltage output
output means
ignition
ignition device
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
EP95402506A
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German (de)
French (fr)
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EP0713006B1 (en
Inventor
Pierre Heritier-Best
Laurent Coste
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Sagem SA
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Sagem SA
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Publication date
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Publication of EP0713006A1 publication Critical patent/EP0713006A1/en
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Publication of EP0713006B1 publication Critical patent/EP0713006B1/en
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    • 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
    • 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
    • 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
    • H01F2038/122—Ignition, e.g. for IC engines with rod-shaped core

Definitions

  • the present invention relates to an ignition member for an internal combustion engine and, more particularly, such a member comprising a secondary winding and high voltage output means of said secondary winding, capable of supplying an ignition spark to a cylinder. an internal combustion engine.
  • Document EP-A-0 387 993 also discloses an assembly constituted by a spark plug integral with the high voltage secondary part of an ignition coil. The primary, low voltage, part of this coil is attached over the secondary part. This coil is therefore partially secured to the candle and also aims at its individual supply.
  • the present invention aims to overcome these drawbacks.
  • These holding means may comprise a resin poured into the housing, or even a blocking plug.
  • the high-voltage output means can comprise a ceramic base insulating conductive means from the housing.
  • said primary and secondary windings are directly embedded in said resin.
  • said coils are embedded in a first resin prior to their insertion into said resin.
  • the ignition member according to the invention may comprise a cap of synthetic material between said coils and said high voltage output means.
  • Said housing may include an envelope welded to a ground piece crimped on a base insulating said high voltage output means from said housing.
  • Said housing can also form an envelope crimped on a base insulating it from said high voltage output means.
  • the ignition member according to the invention may include a plug closing said housing opposite to said high voltage output means.
  • the ignition member of FIG. 1 comprises a magnetic core 1 on which is wound a primary winding 2.
  • a secondary winding 3, here of the compartment type, is arranged above the primary winding, concentrically, and receives the secondary winding 4. For clarity, the coils are not shown in Figure 1.
  • the primary winding 2 is supplied from a connector 5, and the high voltage output of the secondary winding takes place on an output member 6, here a spring.
  • the “coil” assembly which has just been described is disposed in a housing 7 provided at its end opposite to the connector 5, with a mounting thread 8 on a motor unit, not shown, and a ground electrode 9 similar to that of a candle.
  • the housing 7 comprises screwing means 10 capable of cooperating with an appropriate key to block the thread 8 in the corresponding thread of the engine block.
  • a high voltage electrode 11 is mounted in the housing 7 opposite the ground electrode 9 and is connected to the high voltage output member 6 by an electrically conductive assembly 12.
  • the high voltage electrode 11 and the conductor assembly 12 are isolated from the housing 7 by a base 13 made of a ceramic of the same type as that of the spark plugs.
  • the “coil” assembly described above is then, in turn, placed in the housing with the high voltage output member 6 in contact with the end of the conductor assembly 12. Finally, an insulating resin, not shown, is poured into the housing 7 to isolate and maintain the various elements.
  • the "coil” assembly is produced beforehand in a unitary manner and embedded in a resin 20.
  • This assembly is associated, on the side 21 of its high voltage output, with a connector 22 connecting it to the conductive assembly 12.
  • a connection 23 connects it to ground.
  • This housing here forms a tubular part welded to a mass part 25 in which the base 13 is crimped and comprising the thread 8 previously described.
  • a second resin is here cast between the coil assembly and its own resin 20, and the housing 7.
  • control connector 26 comprising a single or double connection, is mounted on a plug 27 screwed onto the housing 7, and more particularly onto the screwing piece 10.
  • the second resin could be omitted, the elements inside the housing being only held by the plug 27. In such a case, the ignition member would remain removable.

Abstract

The spark plug includes the primary winding on a magnetic core (1) which is surrounded by a compartmented secondary former (3) and fed with DC via a connector (5). The two windings are enclosed in a casing (7) threaded (8) at the other end for insertion into the cylinder head. The high-voltage electrode (11) projects from the threaded end towards the tip of the earth electrode (9), and is energised from the secondary winding via a conductor (12) insulated from the ceramic base (13). The high-voltage assembly (11-13) is encased first, followed by the windings and an insulating resin which fills the casing.

Description

La présente invention concerne un organe d'allumage pour moteur à combustion interne et, plus particulièrement, un tel organe comprenant un bobinage secondaire et des moyens de sortie haute tension dudit bobinage secondaire, susceptibles de fournir une étincelle d'allumage à un cylindre d'un moteur à combustion interne.The present invention relates to an ignition member for an internal combustion engine and, more particularly, such a member comprising a secondary winding and high voltage output means of said secondary winding, capable of supplying an ignition spark to a cylinder. an internal combustion engine.

On connaît déjà des bobines d'allumage destinées à être montées sur une bougie en vue de l'alimentation électrique individuelle de cette bougie.There are already known ignition coils intended to be mounted on a spark plug for the individual electrical supply of this spark plug.

On connaît aussi par le document EP-A-0 387 993 un ensemble constitué par une bougie solidaire de la partie secondaire, haute tension, d'une bobine d'allumage. La partie primaire, basse tension, de cette bobine est rapportée par dessus la partie secondaire. Cette bobine est donc partiellement solidaire de la bougie et vise aussi à son alimentation individuelle.Document EP-A-0 387 993 also discloses an assembly constituted by a spark plug integral with the high voltage secondary part of an ignition coil. The primary, low voltage, part of this coil is attached over the secondary part. This coil is therefore partially secured to the candle and also aims at its individual supply.

Un tel ensemble présente toutefois deux inconvénients. D'une part, il n'est pas unitaire puisqu'il nécessite le montage de la partie primaire de la bobine après son propre montage sur le bloc moteur. Et par ailleurs, il est incompatible avec les bougies traditionnelles.However, such an assembly has two drawbacks. On the one hand, it is not unitary since it requires the mounting of the primary part of the coil after its own mounting on the engine block. And moreover, it is incompatible with traditional candles.

La présente invention vise à pallier ces inconvénients.The present invention aims to overcome these drawbacks.

A cet effet, l'invention a pour objet un organe d'allumage tel que décrit ci-dessus, caractérisé par le fait qu'il comprend:

  • un bobinage primaire;
  • un boîtier dans lequel sont disposés lesdits bobinages et lesdits moyens de sortie haute tension; et
  • des moyens de maintien pour maintenir les bobinages et les moyens de sortie dans le boîtier.
To this end, the subject of the invention is an ignition member as described above, characterized in that it comprises:
  • a primary winding;
  • a housing in which are arranged said coils and said high voltage output means; and
  • holding means for holding the windings and the output means in the housing.

Ces moyens de maintien peuvent comprendre une résine coulée dans le boîtier, ou encore un bouchon de blocage.These holding means may comprise a resin poured into the housing, or even a blocking plug.

On réalise ainsi un organe unitaire combinant les fonctions des bobines d'allumage et des bougies traditionnelles.This produces a unitary unit combining the functions of ignition coils and traditional candles.

Plus particulièrement, les moyens de sortie haute tension peuvent comprendre un culot en céramique isolant des moyens conducteur du boîtier.More particularly, the high-voltage output means can comprise a ceramic base insulating conductive means from the housing.

Dans un mode de réalisation particulier de l'invention, lesdits bobinages primaire et secondaire sont directement noyés dans ladite résine.In a particular embodiment of the invention, said primary and secondary windings are directly embedded in said resin.

Dans un autre mode de réalisation, lesdits bobinages sont noyés dans une première résine préalablement à leur insertion dans ladite résine.In another embodiment, said coils are embedded in a first resin prior to their insertion into said resin.

Plus particulièrement, l'organe d'allumage selon l'invention peut comporter un capuchon de matière synthétique entre lesdits bobinages et lesdits moyens de sortie haute tension.More particularly, the ignition member according to the invention may comprise a cap of synthetic material between said coils and said high voltage output means.

Ledit boîtier peut comporter une enveloppe soudée à une pièce de masse sertie sur un culot isolant lesdits moyens de sortie haute tension dudit boîtier.Said housing may include an envelope welded to a ground piece crimped on a base insulating said high voltage output means from said housing.

Ledit boîtier peut aussi former une enveloppe sertie sur un culot l'isolant desdits moyens de sortie haute tension.Said housing can also form an envelope crimped on a base insulating it from said high voltage output means.

L'organe d'allumage selon l'invention peut comporter un bouchon fermant ledit boîtier à l'opposé desdits moyens de sortie haute tension.The ignition member according to the invention may include a plug closing said housing opposite to said high voltage output means.

On décrira maintenant, à titre d'exemple non limitatif, un mode de réalisation particulier de l'invention, en référence aux dessins schématiques annexés dans lesquels:

  • la figure 1 est une vue en coupe axiale d'un organe d'allumage selon un premier mode de réalisation de l'invention;
  • la figure 2 est une vue à plus grande échelle de la partie supérieure de la figure 1; et
  • la figure 3 est une vue partielle similaire à la figure 1 d'un deuxième mode de réalisation.
A particular embodiment of the invention will now be described, by way of nonlimiting example, with reference to the appended schematic drawings in which:
  • Figure 1 is an axial sectional view of an ignition member according to a first embodiment of the invention;
  • Figure 2 is an enlarged view of the upper part of Figure 1; and
  • Figure 3 is a partial view similar to Figure 1 of a second embodiment.

L'organe d'allumage de la figure 1 comprend un noyau magnétique 1 sur lequel est enroulé un bobinage primaire 2. Un bobinot secondaire 3, ici du type à compartiments, est disposé par dessus le bobinage primaire, concentriquement, et reçoit le bobinage secondaire 4. Pour plus de clarté, les bobinages ne sont pas représentés à la figure 1.The ignition member of FIG. 1 comprises a magnetic core 1 on which is wound a primary winding 2. A secondary winding 3, here of the compartment type, is arranged above the primary winding, concentrically, and receives the secondary winding 4. For clarity, the coils are not shown in Figure 1.

Comme dans une bougie d'allumage, le bobinage primaire 2 est alimenté à partir d'un connecteur 5, et la sortie haute tension du bobinage secondaire s'effectue sur un organe de sortie 6, ici un ressort.As in a spark plug, the primary winding 2 is supplied from a connector 5, and the high voltage output of the secondary winding takes place on an output member 6, here a spring.

L'ensemble "bobine" qui vient d'être décrit est disposé dans un boîtier 7 muni à son extrémité opposée au connecteur 5, d'un filetage de montage 8 sur un bloc moteur, non représenté, et d'une électrode de masse 9 similaire à celle d'une bougie. A son autre extrémité, le boîtier 7 comporte des moyens de vissage 10 susceptibles de coopérer avec une clé appropriée pour bloquer le filetage 8 dans le filetage correspondant du bloc moteur.The “coil” assembly which has just been described is disposed in a housing 7 provided at its end opposite to the connector 5, with a mounting thread 8 on a motor unit, not shown, and a ground electrode 9 similar to that of a candle. At its other end, the housing 7 comprises screwing means 10 capable of cooperating with an appropriate key to block the thread 8 in the corresponding thread of the engine block.

Une électrode haute tension 11 est montée dans le boîtier 7 en vis-à-vis de l'électrode de masse 9 et est reliée à l'organe de sortie haute tension 6 par un ensemble électriquement conducteur 12. L'électrode haute tension 11 et l'ensemble conducteur 12 sont isolés du boîtier 7 par un culot 13 réalisé dans une céramique du même type que celle des bougies d'allumage.A high voltage electrode 11 is mounted in the housing 7 opposite the ground electrode 9 and is connected to the high voltage output member 6 by an electrically conductive assembly 12. The high voltage electrode 11 and the conductor assembly 12 are isolated from the housing 7 by a base 13 made of a ceramic of the same type as that of the spark plugs.

Le montage de l'organe selon l'invention qui vient d'être décrit s'effectue de la manière suivante.The assembly of the member according to the invention which has just been described takes place in the following manner.

Le culot 13, muni de l'électrode haute tension 11 et de l'ensemble conducteur 12, est tout d'abord serti dans le boîtier 7. L'ensemble "bobine" précédemment décrit est ensuite, à son tour, disposé dans le boîtier avec l'organe 6 de sortie haute tension au contact de l'extrémité de l'ensemble conducteur 12. Enfin, une résine isolante, non représentée, est coulée dans le boîtier 7 pour isoler et maintenir les différents éléments.The base 13, provided with the high voltage electrode 11 and the conductive assembly 12, is firstly crimped in the housing 7. The “coil” assembly described above is then, in turn, placed in the housing with the high voltage output member 6 in contact with the end of the conductor assembly 12. Finally, an insulating resin, not shown, is poured into the housing 7 to isolate and maintain the various elements.

Dans la figure 3, les mêmes références sont utilisées pour désigner les mêmes éléments.In FIG. 3, the same references are used to designate the same elements.

Dans ce cas, l'ensemble "bobine" est réalisé préalablement d'une manière unitaire et noyé dans une résine 20. Cet ensemble est associé, du côté 21 de sa sortie haute tension, à un connecteur 22 le reliant à l'ensemble conducteur 12. Une connexion 23 le relie à la masse.In this case, the "coil" assembly is produced beforehand in a unitary manner and embedded in a resin 20. This assembly is associated, on the side 21 of its high voltage output, with a connector 22 connecting it to the conductive assembly 12. A connection 23 connects it to ground.

Un capuchon 24 en matière synthétique, notamment en silicone, assure l'étanchéité entre l'ensemble bobine et le boîtier 7.A cap 24 made of synthetic material, in particular silicone, seals between the coil assembly and the housing 7.

Ce boîtier forme ici une pièce tubulaire soudée sur une pièce de masse 25 dans laquelle est serti le culot 13 et comportant le filetage 8 précédemment décrit. Une deuxième résine est ici coulée entre l'ensemble bobine et sa propre résine 20, et le boîtier 7.This housing here forms a tubular part welded to a mass part 25 in which the base 13 is crimped and comprising the thread 8 previously described. A second resin is here cast between the coil assembly and its own resin 20, and the housing 7.

Dans ce mode de réalisation, le connecteur de commande 26, comportant une connexion unique ou double, est monté sur un bouchon 27 vissé sur le boîtier 7, et plus particulièrement sur la pièce de vissage 10.In this embodiment, the control connector 26, comprising a single or double connection, is mounted on a plug 27 screwed onto the housing 7, and more particularly onto the screwing piece 10.

On observera qu'en variante du mode de réalisation de la figure 3, la deuxième résine pourrait être omise, les éléments intérieurs au boîtier étant uniquement maintenus par le bouchon 27. Dans un tel cas, l'organe d'allumage demeurerait démontable.It will be observed that, as a variant of the embodiment of FIG. 3, the second resin could be omitted, the elements inside the housing being only held by the plug 27. In such a case, the ignition member would remain removable.

Claims (10)

Organe d'allumage pour moteur à combustion interne comprenant : - un bobinage secondaire (4); - des moyens (11-13) de sortie haute tension de ladite bobine secondaire susceptibles de fournir une étincelle d'allumage à un cylindre d'un moteur à combustion interne; caractérisé par le fait qu'il comprend: - un bobinage primaire (2); - un boîtier (7) dans lequel sont disposés lesdits bobinages et lesdits moyens de sortie haute tension; et - des moyens de maintien pour maintenir les bobinages et les moyens de sortie dans le boîtier. Ignition device for internal combustion engine comprising: - a secondary winding (4); - Means (11-13) for high-voltage output from said secondary coil capable of supplying an ignition spark to a cylinder of an internal combustion engine; characterized by the fact that it includes: - a primary winding (2); - a housing (7) in which are disposed said coils and said high voltage output means; and - holding means for holding the windings and the output means in the housing. Organe d'allumage selon la revendication 1, dans lequel lesdits moyens de sortie haute tension comprennent un culot (13) en céramique isolant des moyens conducteurs (11, 12) du boîtier (7).Ignition device according to claim 1, in which said high-voltage output means comprise a ceramic base (13) insulating conductive means (11, 12) from the housing (7). Organe d'allumage selon l'une quelconque des revendications 1 et 2, dans lequel lesdits bobinages primaire et secondaire sont directement noyés dans ladite résine.Ignition member according to any one of claims 1 and 2, wherein said primary and secondary windings are directly embedded in said resin. Organe d'allumage selon l'une quelconque des revendications 1 et 2, dans lequel lesdits bobinages sont noyés dans une première résine préalablement à leur insertion dans ladite résine.Ignition member according to any one of claims 1 and 2, wherein said coils are embedded in a first resin prior to their insertion into said resin. Organe d'allumage selon l'une quelconque des revendications 1 à 4, comportant un capuchon (24) de matière synthétique entre lesdits bobinages et lesdits moyens de sortie haute tension.Ignition device according to any one of claims 1 to 4, comprising a cap (24) of synthetic material between said coils and said high voltage output means. Organe d'allumage selon l'une quelconque des revendications 1 à 5, dans laquelle ledit boîtier comporte une enveloppe soudée à une pièce de masse (25) sertie sur un culot (12) isolant lesdits moyens de sortie haute tension dudit boîtier.Ignition device according to any one of claims 1 to 5, in which said housing comprises an envelope welded to a ground piece (25) crimped on a base (12) insulating said high voltage output means from said housing. Organe d'allumage selon l'une quelconque des revendications 1 à 5, dans lequel ledit boîtier forme une enveloppe sertie sur un culot (13) l'isolant desdits moyens de sortie haute tension.Ignition device according to any one of claims 1 to 5, in which said housing forms an envelope crimped on a base (13) insulating it from said high-voltage output means. Organe d'allumage selon l'une quelconque des revendications 1 à 7, comportant un bouchon (27) fermant ledit boîtier à l'opposé desdits moyens de sortie haute tension.Ignition device according to any one of Claims 1 to 7, comprising a plug (27) closing said housing opposite said high-voltage output means. Organe d'allumage selon l'une quelconque des revendications 1 à 8, dans lequel lesdits moyens de maintien comprennent une résine coulée dans ledit boîtier.An ignition member according to any one of claims 1 to 8, wherein said holding means comprises a resin poured into said housing. Organe d'allumage selon l'une quelconque des revendications 1 à 9, dans lequel lesdits moyens de maintien comprennent un bouchon de blocage (27).Ignition device according to any one of claims 1 to 9, in which said holding means comprise a blocking plug (27).
EP95402506A 1994-11-15 1995-11-09 Ignition part for internal combustion engines and method of manufacturing it Expired - Lifetime EP0713006B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9413643 1994-11-15
FR9413643A FR2726864B1 (en) 1994-11-15 1994-11-15 IGNITION DEVICE FOR INTERNAL COMBUSTION ENGINE

Publications (2)

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EP0713006A1 true EP0713006A1 (en) 1996-05-22
EP0713006B1 EP0713006B1 (en) 2000-04-12

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US (1) US6259344B1 (en)
EP (1) EP0713006B1 (en)
JP (1) JPH08236261A (en)
DE (1) DE69516241T2 (en)
FR (1) FR2726864B1 (en)

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"INTEGRAL COIL-SPARK PLUG", RESEARCH DISCLOSURE, no. 328, 1 August 1991 (1991-08-01), pages 626, XP000217946 *

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0848394A1 (en) * 1996-12-10 1998-06-17 General Motors Corporation Integrated ignition coil and spark plug
FR2781600A1 (en) * 1998-07-21 2000-01-28 Bremicker Auto Elektrik LONGLINE ELECTRIC IGNITION COIL
CN1756011B (en) * 2004-09-28 2011-03-23 罗伯特·博世有限公司 Spark plug and its production method
CN101248564B (en) * 2005-08-22 2012-06-13 日本特殊陶业株式会社 Spark plug
CN101292403B (en) * 2005-10-18 2012-06-20 雷诺股份公司 Spark plug for motor vehicle internal combustion engine
CN101043125B (en) * 2006-03-20 2012-05-23 日本特殊陶业株式会社 Spark plug for use in an internal-combustion engine
CN101276998B (en) * 2007-03-28 2012-05-02 日本特殊陶业株式会社 Method for producing spark plug and spark plug
CN101277000B (en) * 2007-03-30 2012-06-13 日本特殊陶业株式会社 Spark plug for internal combustion engine
WO2011015427A3 (en) * 2009-08-03 2011-10-20 Robert Bosch Gmbh Ignition coil, spark plug, and ignition arrangement
CN102472241A (en) * 2009-08-03 2012-05-23 罗伯特·博世有限公司 Ignition coil, spark plug, and ignition arrangement having an ignition coil and spark plug
US9194359B2 (en) 2009-08-03 2015-11-24 Robert Bosch Gmbh Ignition coil, spark plug, and ignition set-up including an ignition coil and spark plug
EP2652846A2 (en) * 2010-12-15 2013-10-23 Federal-Mogul Ignition Company Corona igniter including ignition coil with improved isolation

Also Published As

Publication number Publication date
US6259344B1 (en) 2001-07-10
JPH08236261A (en) 1996-09-13
DE69516241T2 (en) 2000-11-23
DE69516241D1 (en) 2000-05-18
FR2726864A1 (en) 1996-05-15
EP0713006B1 (en) 2000-04-12
FR2726864B1 (en) 1996-12-27

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