EP0565655B1 - Bobine d'allumage pour systemes d'allumage de moteurs a combustion interne - Google Patents

Bobine d'allumage pour systemes d'allumage de moteurs a combustion interne Download PDF

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Publication number
EP0565655B1
EP0565655B1 EP92919354A EP92919354A EP0565655B1 EP 0565655 B1 EP0565655 B1 EP 0565655B1 EP 92919354 A EP92919354 A EP 92919354A EP 92919354 A EP92919354 A EP 92919354A EP 0565655 B1 EP0565655 B1 EP 0565655B1
Authority
EP
European Patent Office
Prior art keywords
spark plug
ignition coil
plug connector
niche
centring sleeve
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.)
Expired - Lifetime
Application number
EP92919354A
Other languages
German (de)
English (en)
Other versions
EP0565655A1 (fr
Inventor
Walter Benedikt
Dieter Betz
Werner Grewe
Gerhard Haist
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP0565655A1 publication Critical patent/EP0565655A1/fr
Application granted granted Critical
Publication of EP0565655B1 publication Critical patent/EP0565655B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • H01T13/02—Details
    • H01T13/04—Means providing electrical connection to sparking plugs
    • 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
    • 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
    • H01T13/40—Sparking plugs structurally combined with other devices
    • H01T13/44—Sparking plugs structurally combined with other devices with transformers, e.g. for high-frequency ignition

Definitions

  • the invention relates to an ignition coil according to the preamble of claim 1.
  • ignition coils which have a sleeve-shaped secondary connecting part which projects from the housing of the ignition coil and which leads to the high voltage to the spark plug, consisting of a connecting dome and a spark plug connector which is thus captively coupled.
  • the coupling point between the connector dome and the spark plug connector is designed in such a way that the spark plug connector can be pivoted to a small extent with respect to the connector dome which projects rigidly from the housing of the ignition coil. This pivoting serves to compensate for tolerances between the ignition coil, which is attached directly to the cylinder head, and the spark plug, which is fixed in a niche in the cylinder head of the internal combustion engine.
  • the plug niche has a larger inner diameter than the outer diameter of the spark plug or the spark plug connector connected to the ignition coil, it can happen in rare cases that when the ignition coil is installed on the cylinder head, the spark plug connector does not slide onto the spark plug, but in the space between the wall of the candle niche and the spark plug. This incorrect assembly is generally not recognized during the initial operation of the internal combustion engine, since the spark plug is not properly contacted due to the high voltage supply of the ignition coil Arcing receives a reduced but sufficient ignition voltage.
  • EP-A-0 445 557 also discloses an ignition coil with a sleeve-shaped secondary connection part, consisting of a connection dome and a spark plug connector that is captively coupled therewith. Claim 1 is based on this document.
  • connection dome In order to facilitate and make the assembly of the connection dome on the spark plug accommodated in the candle niche safer, the connection dome has centering means on the outside in the form of ring beads. These centering means are inseparable integral parts of the spark plug connector, which can only be used for an installation geometry in a plug niche. With variable installation conditions, the ignition coils must each be equipped with different, individually adapted spark plug connectors, which prevents cost-effective production.
  • the ignition coil according to the invention with the characterizing features of claim 1 has the advantage that the centering means, which is designed as a centering sleeve, is applied as a separate component on the spark plug connector.
  • the single figure shows the ignition coil in partial section with which the spark plug contacts.
  • An ignition coil 11 for ignition systems of internal combustion engines for motor vehicles is fixed in the single figure in a manner not shown on the cylinder head 12 of an internal combustion engine.
  • the ignition coil 11 is largely covered by a cup-shaped housing 13 made of glass fiber reinforced thermoplastic.
  • this includes a core made of magnetically conductive material, one leg of which carries a primary winding and a secondary winding.
  • a primary connection part 14 is attached to the housing 13, via which the ignition coil 11 is connected to the voltage source of the motor vehicle.
  • a sleeve-shaped secondary connection portion 17 protrudes perpendicular to a filling side 16 of the housing 13. This forms the high-voltage output of the ignition coil 11 and is contact means to a spark plug 18 which is mounted in a plug niche 20 in the cylinder head 12.
  • the secondary connection part 17 is anchored in the ignition coil 11; this is completely poured out with an electrically insulating potting compound made of epoxy resin, which, when cured, closes the pot-shaped housing 13 on the filling side 16 and firmly encloses the secondary connecting part 17 at the point of its exit from the filling side 16.
  • the secondary connecting part 17 is constructed in two pieces with a connecting dome 19 rigidly fixed in the ignition coil 11 and a spark plug connector 21 coupled to it.
  • the connecting dome 19 consists of a metallic pin 22, which is almost completely covered with an insulator 23 made of thermosetting plastic. Only the end region of the pin 22 pointing away from the ignition coil 11 is uninsulated.
  • the pin 22 here has an axial slot 24 and on the circumference an outer annular groove 26 which has a passage to the blind hole 24 on one side and receives a locking ring 27 which projects through the passage into the blind hole 24 on one side.
  • a suitably shaped metallic counterpart of the spark plug connector 21, which is no longer shown, can be inserted into the blind hole 24, and this latches permanently with the locking ring 27.
  • This electrically conductive coupling point between the connecting dome 19 and the spark plug connector 21 enables the spark plug connector 21 to pivot slightly with respect to the connecting dome 19 rigidly connected to the ignition coil 11.
  • the connecting dome 19 and thus also the end region of the pin 22 is encased in an insulating manner by a plug 28 made of silicone rubber of the spark plug connector 21 when the spark plug connector 21 is coupled to the connecting dome 19.
  • the grommet 28, which surrounds the spark plug connector 21 with all of its generally known and not detailed contact parts for the connection dome 19 and for the spark plug 18, is sleeve-shaped and has a cylindrically stepped outer shape, with a shoulder 29 facing the ignition coil 11, one separates first section 31 from a second section 32 of larger diameter.
  • the first section 31 has an annular bead 33, eccentrically in the longitudinal direction, facing the larger section 32.
  • the annular bead 33 forms a latching means for a centering sleeve 34 which can be pushed over the grommet 28.
  • the centering sleeve 34 has a slightly conical outer shape and closes at the end with a small and on the other hand with a large diameter.
  • the inner shape of the centering sleeve 34 contains two cylindrical regions which are essentially designed as stepped inner cylinders and are connected by a conical inner shoulder 36, a first region 37 which closes at the end face with the large diameter and a second region 38 which is opposite the first region 37 has a larger inner diameter and ends at the end with the small diameter.
  • the centering sleeve 34 with the second area 38 is pushed over the first section 31 of the spout 28.
  • the annular bead 33 of the grommet 28 temporarily reaches the first region 37 of the centering sleeve 34, which is smaller in diameter by a press play than that of the annular bead 33, until the inner shoulder 36 of the centering sleeve 34 comes to lie on the shoulder 29 of the grommet 28 of the annular bead 33 on the end face behind the first region 37 and the centering sleeve 34 springs open interlocked on the spout 28.
  • the centering sleeves 34 thus fixed on the grommet 28 are additionally fixed thereon with a force fit by the first section 31 of the grommet 28 being pushed onto the connecting dome 19 until the coupling between the pin 22 and the spark plug connector 21 has taken place.
  • the spout 28 experiences in its first section 31 a widening in diameter due to the outer dimension of the insulator 29, from which the annular bead 33 is also gripped, so that the centering sleeve 34 can no longer be detached from the spout 28.
  • the ignition coil 11 thus supplemented with the centering sleeve 34 can now be mounted on the cylinder head 12 in such a way that the spark plug connector 21 always slides centrally onto the spark plug 18, since the centering sleeve 34, with its outer shape adapted to the internal geometry of the plug recess 20, taking into account a play of motion, the spark plug connector 21 leads centrally in the candle niche 20.
  • the centering sleeve 34 is provided on its outer jacket with a plurality of longitudinal grooves 39.
  • the centering sleeve 34 can also be used in a multi-spark ignition coil that supplies a plurality of spark plugs 18 with ignition energy become.
  • This multi-spark ignition coil has, in addition to the previously described secondary connection part 17, further secondary connection parts which are generally flexibly connected to the multi-spark ignition coil via ignition cables.
  • the assembly of these secondary connection parts 17 on the spark plugs is particularly susceptible to faults and can also be carried out without errors by inexperienced assembly personnel through the use of centering sleeves 34.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Ignition Installations For Internal Combustion Engines (AREA)

Abstract

Dans les bobines d'allumage (11) comportant un élément de connexion secondaire (17) qui est moulé sur leur embase (13), qui transmet la haute tension à la bobine d'allumage (18) et qui est composé d'un dôme de raccordement fixe (19) et d'une cosse de bougie (21) à couplage mobile, il faut veiller lors du montage de la bobine d'allumage (11) sur la culasse (12) à ce que le siège de la cosse (21) sur la bougie (18) soit impeccable. A cet effet, la cosse de bougie (21) présente sur sa paroi extérieure un bourrelet annulaire (33) qui maintient une douille de centrage (34) par liaison de forme. Un élargissement radial de ce bourrelet annulaire (33) maintient la douille de centrage (34) fixée par liaison de force et de forme sur la cosse de bougie (21). La forme extérieure de la douille de centrage (34) est adaptée à la forme intérieure d'une niche de bougie (20) de la culasse (12) qui reçoit la bougie d'allumage (18), compte tenu d'un certain jeu de mouvement, de sorte que la bobine d'allumage (11) puisse être fiablement guidée avec la cosse (21) ainsi complétée, et montée sur la bougie d'allumage (18).

Claims (6)

  1. Bobine d'allumage pour une installation d'allumage d'un moteur à combustion interne de véhicule automobile, comportant au moins une partie de raccordement de secondaire (17) ayant au moins un dôme de raccordement (19) relié rigidement à la bobine d'allumage (11) et un connecteur de bougie (21) couplé à ce dôme, ce connecteur pouvant être emmanché sur une bougie (18) montée dans un logement à bougie (20), avec un moyen de centrage (34) adapté à la forme du logement à bougie (20) en tenant compte d'un jeu nécessaire au mouvement, caractérisée en ce que le dôme de raccordement (19) comporte une broche (22) pour être reliée au connecteur de bougie (21), et le moyen de centrage (34) est une pièce distincte en forme de manchon de centrage (34), fixée de manière imperdable sur le connecteur de bougie (21).
  2. Bobine d'allumage selon la revendication 1, caractérisée en ce que le connecteur de bougie (21) comprend une douille élastique (28) formant sa paroi extérieure, cette douille ayant au moins un bourrelet, notamment un bourrelet annulaire (33) qui, lors de l'emmanchement du manchon de centrage (34) sur le connecteur de bougie (21), peut être mis en position d'accrochage maintenant le manchon de centrage (34) par une liaison de forme.
  3. Bobine d'allumage selon la revendication 2, caractérisée en ce que, lors du raccordement du connecteur de bougie (21) sur la broche (22) du dôme de raccordement (19), la douille (28) est glissée par dessus le dôme de raccordement (19) en s'élargissant dans la direction radiale, de sorte que le bourrelet annulaire (33) est élargi radialement et cet élargissement fixe par une liaison de force et la forme, le manchon de centrage (34) emmanché sur la douille (28).
  4. Bobine d'allumage selon la revendication 1 à 3, caractérisée en ce que le manchon de centrage (34) est adapté en forme, notamment au diamètre du logement à bougie (20), et ses dimensions extérieures sont diminuées par rapport aux dimensions intérieures du logement à bougie (20) d'un jeu nécessaire au mouvement.
  5. Bobine d'allumage selon la revendication 1-4, caractérisée en ce que le manchon de centrage (34) a une forme extérieure légèrement conique tournée vers le côté de petit diamètre du logement à bougie (20).
  6. Bobine d'allumage selon l'une des revendications précédentes, caractérisée en ce que l'enveloppe extérieure du manchon de centrage (34) comporte au moins une rainure longitudinale (39).
EP92919354A 1991-11-05 1992-09-12 Bobine d'allumage pour systemes d'allumage de moteurs a combustion interne Expired - Lifetime EP0565655B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE9113753U 1991-11-05
DE9113753U DE9113753U1 (de) 1991-11-05 1991-11-05 Zündspule für Zündanlagen von Brennkraftmaschinen
PCT/DE1992/000773 WO1993009345A1 (fr) 1991-11-05 1992-09-12 Bobine d'allumage pour systemes d'allumage de moteurs a combustion interne

Publications (2)

Publication Number Publication Date
EP0565655A1 EP0565655A1 (fr) 1993-10-20
EP0565655B1 true EP0565655B1 (fr) 1995-12-27

Family

ID=6872951

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92919354A Expired - Lifetime EP0565655B1 (fr) 1991-11-05 1992-09-12 Bobine d'allumage pour systemes d'allumage de moteurs a combustion interne

Country Status (5)

Country Link
US (1) US5333592A (fr)
EP (1) EP0565655B1 (fr)
JP (1) JPH06503869A (fr)
DE (2) DE9113753U1 (fr)
WO (1) WO1993009345A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5547387A (en) * 1993-08-05 1996-08-20 Sumitomo Wiring Systems, Ltd. Joint construction for ignition system
JPH0729822U (ja) * 1993-11-11 1995-06-02 住友電装株式会社 内燃機関の点火装置
JP3556725B2 (ja) * 1995-03-20 2004-08-25 三菱電機株式会社 内燃機関の点火装置
JP3165000B2 (ja) * 1995-04-21 2001-05-14 株式会社日立製作所 内燃機関用点火装置
DE102019123721B4 (de) * 2019-09-04 2021-09-30 Man Energy Solutions Se Kipphebeldeckel mit Zündkerzenkontaktierung für eine Brennkraftmaschine

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4514712A (en) * 1975-02-13 1985-04-30 Mcdougal John A Ignition coil
DE3544870A1 (de) * 1985-12-18 1987-06-19 Beru Werk Ruprecht Gmbh Co A Zuendkerzenstecker
EP0297487B1 (fr) * 1987-06-30 1994-09-14 TDK Corporation Transformateur
US5003958A (en) * 1988-12-27 1991-04-02 Nissan Motor Co., Ltd. Ignition coil mounting structure for engine
US4903674A (en) * 1989-03-13 1990-02-27 General Motors Corporation Spark developing apparatus for internal combustion engines
JP2995763B2 (ja) * 1989-11-10 1999-12-27 株式会社デンソー 点火コイル
ES2057622T3 (es) * 1990-03-08 1994-10-16 Nippon Denso Co Bobina de encendido para un motor de combustion interna.
FR2661216B1 (fr) * 1990-04-23 1992-08-14 Electricfil Ind Sarl Bobine integree d'allumage individuel d'une bougie de moteur thermique a combustion interne et a allumage commande.
FR2661573B1 (fr) * 1990-04-25 1994-06-10 Sgs Thomson Microelectronics Circuit de commande de grille par impulsion avec securite de court-circuit.
US5152274A (en) * 1990-08-01 1992-10-06 Mitsubishi Denki Kabushiki Kaisha Ignition coil apparatus
JPH04143461A (ja) * 1990-10-05 1992-05-18 Honda Motor Co Ltd 内燃機関の点火装置
JPH0544622A (ja) * 1991-08-12 1993-02-23 Nippondenso Co Ltd 多気筒内燃機関の点火装置
US5241941A (en) * 1992-09-03 1993-09-07 Ford Motor Company Ignition coil

Also Published As

Publication number Publication date
WO1993009345A1 (fr) 1993-05-13
EP0565655A1 (fr) 1993-10-20
US5333592A (en) 1994-08-02
DE9113753U1 (de) 1993-03-04
JPH06503869A (ja) 1994-04-28
DE59204854D1 (de) 1996-02-08

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