EP2016653A1 - Bobine d'allumage, en particulier pour un moteur à combustion interne d'un véhicule automobile - Google Patents

Bobine d'allumage, en particulier pour un moteur à combustion interne d'un véhicule automobile

Info

Publication number
EP2016653A1
EP2016653A1 EP07727839A EP07727839A EP2016653A1 EP 2016653 A1 EP2016653 A1 EP 2016653A1 EP 07727839 A EP07727839 A EP 07727839A EP 07727839 A EP07727839 A EP 07727839A EP 2016653 A1 EP2016653 A1 EP 2016653A1
Authority
EP
European Patent Office
Prior art keywords
contact
ignition coil
hold
contact sleeve
down element
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
EP07727839A
Other languages
German (de)
English (en)
Other versions
EP2016653B1 (fr
Inventor
Konstantin Lindenthal
Thomas Breckle
Johannes Kappeler
Holger Raaf
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 EP2016653A1 publication Critical patent/EP2016653A1/fr
Application granted granted Critical
Publication of EP2016653B1 publication Critical patent/EP2016653B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • 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
    • 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
    • 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
    • H01F27/02—Casings
    • H01F27/04—Leading of conductors or axles through casings, e.g. for tap-changing arrangements
    • 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
    • H01F27/40—Structural association with built-in electric component, e.g. fuse
    • 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
    • H01F41/10—Connecting leads to windings
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F5/00—Coils
    • H01F5/04—Arrangements of electric connections to coils, e.g. leads

Definitions

  • Ignition coil in particular for an internal combustion engine of a motor vehicle
  • the invention relates to an ignition coil, in particular for an internal combustion engine of a motor vehicle according to the preamble of claim 1.
  • Such an ignition coil is known from DE 102 51 840 Al.
  • the known ignition coil of the end portion of a secondary coil body is received together with a contact sleeve of a cup-like end portion of a high voltage bolt ( Figure 4).
  • the high-voltage pin protrudes up to a stop on the secondary coil body zoom, which in turn serves as a stop for the contact sleeve.
  • contact sleeve and high-voltage pin end in the same plane.
  • the contact sleeve Since the contact sleeve has relatively sharp corners and edges as a result of their formation as a stamped part, cracks can be caused by these regions during operation of the ignition coil due to the different thermal expansion coefficients of the materials under varying temperatures. If the cracks extend over a larger area in the ignition coil housing, there is a risk of flashovers that affect the functioning of the ignition coil.
  • the ignition coil according to the invention in particular for an internal combustion engine of a motor vehicle, with the features of claim 1 has the advantage that the extent of cracks is limited or limited in thermomechanical stress of the ignition coil. This is achieved according to the invention essentially in that the hold-down element surrounding the contact sleeve projects beyond or covers the contact sleeve that cracks emanating from corners or edges of the contact sleeve still terminate within the hold-down element, and can not expand further outside the hold-down element in the housing of the ignition coil.
  • FIG. 1 shows a greatly simplified longitudinal section through parts of an ignition coil, Figure 2 components of the high-voltage side terminal of the ignition coil of Figure 1 in
  • Figure 3 shows the area of the high voltage terminal in an enlarged longitudinal section
  • Figure 4 is an exploded view at a modified high voltage side terminal of the ignition coil.
  • the ignition coil 10 has an existing plastic, substantially sleeve-shaped housing 11 from.
  • a secondary coil body 13 is inserted with a secondary winding 14.
  • the high voltage carrying secondary winding 14 provides the ignition energy for a spark plug, not shown, of an internal combustion engine.
  • Secondary coil body 13 has a smaller diameter portion 16, on which the one contacting the spark plug one end of the secondary winding 14 is wound.
  • a made of electrically conductive metal contact sleeve 18 is pushed.
  • the contact sleeve 18 has a circular or annular region 19, from which bent contact tabs 20 extend.
  • the contact sleeve 18 is preferably produced by a stamping process in which the contact tabs 20 are bent from the region 19 after punching.
  • the contact tabs 20 contact areas 21, which after the Sliding the contact sleeve 18 on the end portion 17 of the secondary coil body 13 in register with the arranged in section 16 secondary winding 14 are.
  • the contact tabs 20 are on the side facing away from the region 19 of the contact portions 21 radially bent slightly outwards and end in hold-down sections 22. From area 19 of the contact sleeve 18 protrude at uniform angular intervals in the embodiment, three triangular contact ribs 24 inside.
  • a sleeve-shaped hold-down element 25 can be pushed over.
  • the hold-down element 25 is made in the illustrated embodiment of sheet metal by a non-cutting forming process, and has on the contact sleeve 18 side facing a radially outwardly widening insertion region 26.
  • the material of the hold-down element 25 is flanged so that a rounded inlet edge 27 results without sharp corners or edges. It is essential that the length of the hold-down element 25 is dimensioned such that upon reaching the end position shown in Figure 3 of the hold-down element 25 of the insertion 26 with its inlet edge 27 in
  • the contact tabs 20 are not only covered by the hold-down element 25, but the hold-down element 25 still extends by a certain length, for example by a third or half the length of the contact tabs 20 beyond the contact tabs 20.
  • a pin-shaped suppression resistor 31 is inserted in the sleeve-shaped end of the end portion 17 of the secondary coil body 13.
  • the interference resistor 31 is integrally connected to a high voltage terminal 32, which in turn electrically contacts the spark plug, not shown.
  • the merging of suppression resistor 31 and secondary coil body 13 takes place when mounted on the secondary coil body 13 contact sleeve 18 and hold-down element 25. In this case, the suppression resistor 31 first penetrates through an opening 33 of the hold-down element 25 to subsequently penetrate through the annular portion 19 of the contact sleeve 18.
  • the formation of the contact ribs 24th on the region 19 of the contact sleeve 18 is such that the contact ribs 24 come into operative connection with the circumference of the Entstörwiderstands 31 and thereby penetrate the outer protective layer, so that an electrical connection between the contact sleeve 18 and the high voltage terminal 32 via the suppression resistor 31.
  • the housing 11 After mounting the components of the ignition coil 10, the housing 11 is filled with a thermosetting insulating resin, which fills the gaps in the ignition coil 10, and in particular ensures electrical insulation between the voltage-bearing components.
  • This insulating resin inter alia also fills the annular space 35 between the hold-down element 25 and the secondary coil body 13 (FIG. 3). Due to the
  • the contact sleeve 18 is usually a plurality of relatively sharp corners or edges, in particular the contact tabs 22. From these areas is in thermo-mechanical stresses a risk of cracking in the insulating resin. If these cracks extend between components having different voltage levels, there is the risk of voltage flashovers which impair the function of the ignition coil 10.
  • the hold-down element 25 can not only, as described in the exemplary embodiment, consist of an electrically conductive or non-conductive metal, but can for example also be made of plastic.
  • the hold-down element and the high-voltage connection are formed as a combined, one-part component 36 consisting of conductive metal.
  • the hold-down element and the high-voltage connection are formed as a combined, one-part component 36 consisting of conductive metal.
  • contact ribs 24a are provided on the contact sleeve 18a, which are arranged radially outwardly projecting on the contact sleeve 18a.
  • the electrical connection is produced in such a way that, when the component 36 is pushed over onto the contact sleeve 18a, the contact ribs 24a make electrical contact with the component 36 on its inner wall.
  • the length of the component 36 such that its insertion 37 clearly overlap the contact tabs 22a of the contact sleeve 18a in the final position of the component 36 and a outgoing from the contact sleeve 18a propagation of cracks in the insulating resin outside of the component 36 can thus be avoided.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Ignition Installations For Internal Combustion Engines (AREA)

Abstract

L'invention concerne une bobine d'allumage (10), en particulier pour un moteur à combustion interne d'un véhicule automobile, avec un enroulement secondaire (14) disposé sur un corps de bobine (13) pour produire une tension élevée au niveau d'une bobine d'allumage, avec un connecteur femelle (18 ; 18a) établissant un contact électrique avec l'enroulement secondaire (14) et qui peut coulisser par-dessus une zone d'extrémité (17) du corps de bobine (13) et présente au moins un élément de contact (22; 22a) pour la bobine secondaire (14), et avec un élément de retenue (25;36) pouvant coulisser par-dessus le connecteur femelle (18; 18a), élément qui agit sur au moins un élément de contact (22; 22a) du connecteur femelle (28; 18a), moyennant quoi, observé dans le sens axial du corps de bobine (13), l'élément de retenue (25; 36) en sa position de fin dépasse au moins un élément de contact (22; 22a) du connecteur femelle (18; 18a) et recouvre au moins un élément de contact (22; 22a).
EP07727839A 2006-05-02 2007-04-05 Bobine d'allumage, en particulier pour un moteur à combustion interne d'un véhicule automobile Active EP2016653B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102006020170A DE102006020170A1 (de) 2006-05-02 2006-05-02 Zündspule, insbesondere für eine Brennkraftmaschine eines Kraftfahrzeugs
PCT/EP2007/053371 WO2007125008A1 (fr) 2006-05-02 2007-04-05 Bobine d'allumage, en particulier pour un moteur à combustion interne d'un véhicule automobile

Publications (2)

Publication Number Publication Date
EP2016653A1 true EP2016653A1 (fr) 2009-01-21
EP2016653B1 EP2016653B1 (fr) 2013-02-13

Family

ID=38255112

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07727839A Active EP2016653B1 (fr) 2006-05-02 2007-04-05 Bobine d'allumage, en particulier pour un moteur à combustion interne d'un véhicule automobile

Country Status (6)

Country Link
US (1) US8439023B2 (fr)
EP (1) EP2016653B1 (fr)
JP (1) JP4881431B2 (fr)
CN (1) CN101432937B (fr)
DE (1) DE102006020170A1 (fr)
WO (1) WO2007125008A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4701835B2 (ja) 2004-07-27 2011-06-15 株式会社デンソー スティック形点火コイル
US9356433B2 (en) 2012-05-10 2016-05-31 Denso International America, Inc. Ignition coil captured resistor
DE102012221897A1 (de) * 2012-11-29 2014-06-05 Robert Bosch Gmbh Elektrische Kontaktanordnung zur Kontaktierung einer Spule

Family Cites Families (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3716038A (en) * 1971-03-31 1973-02-13 Motorola Inc High voltage coil boot
DE3830763C2 (de) * 1988-09-09 1998-04-09 Siemens Ag Elektrische Verbindungsvorrichtung
JP3473817B2 (ja) * 1996-10-18 2003-12-08 株式会社デンソー 内燃機関用点火コイル
JP3709934B2 (ja) * 1996-10-18 2005-10-26 株式会社デンソー 内燃機関用点火コイル
JPH10149933A (ja) * 1996-11-19 1998-06-02 Hitachi Ltd 点火コイル及びこれを用いた内燃機関
JPH11238637A (ja) * 1998-02-23 1999-08-31 Toyota Motor Corp 点火装置
JPH11265832A (ja) * 1998-03-17 1999-09-28 Toyota Motor Corp 内燃機関用点火コイル
JP4051591B2 (ja) 1999-07-08 2008-02-27 株式会社デンソー 点火コイル
US6178957B1 (en) * 1999-09-08 2001-01-30 Visteon Global Technologies, Inc. Pencil ignition coil assembly module
US6522232B2 (en) * 2001-04-26 2003-02-18 Delphi Technologies, Inc. Ignition apparatus having reduced electric field HV terminal arrangement
JP4032692B2 (ja) * 2001-10-16 2008-01-16 株式会社デンソー 点火コイル
JP3918610B2 (ja) * 2002-04-01 2007-05-23 株式会社デンソー 内燃機関用点火装置
DE10251841A1 (de) * 2002-11-07 2004-05-19 Robert Bosch Gmbh Elektrische Kontaktierung dünner Lackdrähte von Sekundärwicklungen von Zündspulen
DE10251840A1 (de) * 2002-11-07 2004-05-19 Robert Bosch Gmbh Elektrische Kontaktierung dünner Lackdrähte von Sekundärwicklungen von Zündspulen
DE10304138B3 (de) * 2003-02-03 2004-07-15 Robert Bosch Gmbh Zündspule mit einer Verbindungseinrichtung zur Kontaktierung mit einer Zündkerze
DE102004002935A1 (de) * 2004-01-21 2005-08-11 Robert Bosch Gmbh Elektrische Kontaktierung dünner Lackdrähte von Sekundärwicklungen von Zündspulen mit Kontaktkrone und Kontaktelement
DE102004003216B3 (de) * 2004-01-22 2005-08-25 Era Ag Zündspule für eine Brennkraftmaschine
US7142080B2 (en) * 2004-02-09 2006-11-28 Denso Corporation Stick-type ignition coil and terminal assembly therefor
JP4701835B2 (ja) * 2004-07-27 2011-06-15 株式会社デンソー スティック形点火コイル
JP4064382B2 (ja) * 2004-08-03 2008-03-19 阪神エレクトリック株式会社 内燃機関用点火コイル

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2007125008A1 *

Also Published As

Publication number Publication date
CN101432937A (zh) 2009-05-13
JP2009535828A (ja) 2009-10-01
US20090301450A1 (en) 2009-12-10
JP4881431B2 (ja) 2012-02-22
WO2007125008A1 (fr) 2007-11-08
CN101432937B (zh) 2012-06-27
EP2016653B1 (fr) 2013-02-13
DE102006020170A1 (de) 2007-11-08
US8439023B2 (en) 2013-05-14

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