EP2165070A1 - Bobine d'allumage - Google Patents

Bobine d'allumage

Info

Publication number
EP2165070A1
EP2165070A1 EP08760442A EP08760442A EP2165070A1 EP 2165070 A1 EP2165070 A1 EP 2165070A1 EP 08760442 A EP08760442 A EP 08760442A EP 08760442 A EP08760442 A EP 08760442A EP 2165070 A1 EP2165070 A1 EP 2165070A1
Authority
EP
European Patent Office
Prior art keywords
spring
ignition coil
block
protective jacket
coil according
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
EP08760442A
Other languages
German (de)
English (en)
Other versions
EP2165070B1 (fr
Inventor
Werner Steinberger
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 EP2165070A1 publication Critical patent/EP2165070A1/fr
Application granted granted Critical
Publication of EP2165070B1 publication Critical patent/EP2165070B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • F02P3/00—Other installations
    • F02P3/02—Other installations having inductive energy storage, e.g. arrangements of induction coils
    • 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
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/02—Contact members
    • H01R13/22—Contacts for co-operating by abutting
    • H01R13/24—Contacts for co-operating by abutting resilient; resiliently-mounted
    • H01R13/2407—Contacts for co-operating by abutting resilient; resiliently-mounted characterized by the resilient means
    • H01R13/2421—Contacts for co-operating by abutting resilient; resiliently-mounted characterized by the resilient means using coil springs
    • 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
    • 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
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/46—Bases; Cases
    • H01R13/53—Bases or cases for heavy duty; Bases or cases for high voltage with means for preventing corona or arcing
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R2201/00—Connectors or connections adapted for particular applications
    • H01R2201/22—Connectors or connections adapted for particular applications for transformers or coils

Definitions

  • the invention relates to an ignition coil according to the preamble of claim 1.
  • an ignition coil is shown with a protective sheath in which a coil spring for electrical connection of the high voltage terminal is arranged with the spark plug.
  • the protective jacket has a passage with a spring area for receiving the coil spring and a candle area for receiving the spark plug. Between the spring portion and the candle area a constriction is provided, which secures the coil spring in the axial direction.
  • the protective jacket is made of several parts, wherein the end pieces of the protective jacket made of silicone and the middle piece are made of insulating resin.
  • the ignition coil according to the invention with the characterizing features of the main claim has the advantage that the protective jacket is made stiffer without additional components and thereby the manufacturing cost of the protective jacket can be reduced by the block portion of the spring at its end facing the spring portion supported on a support shoulder of the protective jacket is. Due to the long block portion of the spring, the protective jacket can be comparatively absorb high axial forces and thereby better and more reliable plugged onto the spark plug.
  • the inventive design the diameter of the elastic protective jacket can be reduced, so that the manufacturing cost is reduced due to material savings and the ignition coil is suitable for engines with smaller plug shaft diameters.
  • the support shoulder also ensures the axial position of the spring in the protective sheath, so that the spring can not fall out of the protective sheath before attaching the ignition coil to the spark plug.
  • the support shoulder is advantageously arranged in the axial direction such that the spring is axially biased between the high voltage terminal and the support shoulder and that their turns are held in block.
  • the diameter of the spring during the transition from the block section to the spring section decreases stepwise or continuously, as formed by the decreasing diameter, a paragraph whose turn is supported on the protective jacket.
  • the diameter of the spring in the block section is constant or widens conically towards the spring section.
  • the through-channel has a block region for receiving the block section of the spring and a plug region for accommodating a spark plug, wherein the support shoulder is provided between the block region and the candle region and a
  • Constriction of the passageway forms.
  • the constriction secures the spring in the protective jacket in the axial direction.
  • the diameter of the spring is conically widened in a contact area of the spring section serving for contacting the spark plug to the spark plug, since in this way reliable contacting of the spring connected to the high-voltage connection with the spark plug is achieved.
  • the spring is formed as a helical spring, since the helical spring is a very cost-effective component.
  • the drawing shows in section a simplified ignition coil according to the invention shown.
  • the ignition coil generates a high voltage required for sparkover on a spark plug.
  • the ignition coil has a coil housing 1, in which a primary coil 2 and a secondary coil 3 cooperate in such a way that a high voltage for a spark plug 5 is generated from a low DC voltage of a battery 4.
  • the primary coil 2 can be electrically connected to the battery 4 via a low-voltage connection 8 and to the spark plug 5 via a high-voltage connection 9.
  • the high voltage terminal 9 is designed for example as a dome, which protrudes from the coil housing 1.
  • the spark plug 5 is usually arranged in a shaft 10 of a cylinder head 11 of an internal combustion engine.
  • the ignition coil is designed as a so-called Kompaktzündspule, the coil housing 1 is disposed outside of the shaft 10 and the high voltage terminal 9 is connected via a connector 12 to the spark plug 5.
  • the connector 12 is fixed to the coil housing 1 connected, for example, non-positively, positively and / or cohesively. For example, he is stuck on the high voltage terminal 9.
  • the connector 12 consists essentially of a contact element 15 for electrical connection of the high voltage terminal 9 with the spark plug 5 and the contact element 15 surrounding, electrically insulating protective jacket 16.
  • the contact element 15 is a helical spring, with its one end, for example in a recess 9.1 of High voltage terminal 9 is arranged and contacted with this electrically.
  • the protective jacket 16 is designed sleeve-shaped, for example, elastic and made of silicone or other electrically insulating material. The wall thickness of the protective jacket 16 is determined by the electrical stress load and the dielectric strength of the material.
  • the protective jacket 16 has a passage 17, in which the contact element 15 is arranged.
  • the spring 15 is provided in the passageway 17 such that the turns abut one another in a block section 15.1 facing the high-voltage connection 9 on a block and are spaced apart from one another in a spring section 15.2 provided for contacting the spark plug 5.
  • the turns of the spring 15 are wound on block.
  • the block section 15.1 of the spring 15 is supported on at least one support shoulder 20 of the protective jacket 16 at its end facing the spring section 15.2. In this way, the turns of the spring 15 are held in the block section 15.1 on block and the connector 12 thereby stiffened in the axial direction. Due to the embodiment of the invention, the connector 12 can absorb higher axial forces and thereby further pushed in the axial direction via a plug of the spark plug 5.
  • the support shoulder 20 is arranged in the axial direction with respect to the longitudinal axis 18 such that the block portion 15.1 between the high voltage terminal 9 and the support shoulder 20 is axially biased. In this way, the turns of the spring 15 are held adjacent to each other in the block section 15.1. In addition, the electrical contact of the spring 15 to the high voltage terminal 9 is reliably ensured.
  • the at least one support shoulder 20 is provided or formed on the circumference of the through-channel 17. It may be executed annularly circumferentially or partially interrupted, whereby a plurality of projections 20 would be formed.
  • the support shoulder 20 protrudes radially into the through channel 17.
  • the through-channel 17 has a block area 17.1 for receiving the block section 15.1 of the spring 15 and a plug area 17.2 for receiving the spark plug 5, wherein the support shoulder 20 is provided between the block area 17.1 and the candle area 17.2 and forms a constriction 17.3 of the through-channel 17.
  • the spring section 15.2 of the spring 15 extends from the block section 17.1, starting through the constriction 17.3 into the candle area 17.2 of the through-channel 17.
  • the diameter of the spring 15 decreases in the transition from the block section 15.1 to the spring section 15.2 stepwise or continuously, in order to support the spring 15 at this transition to the support shoulder 20 can.
  • the diameter of the spring 15 is constant or widens toward the spring section 15.2, for example conically. By this extension of the diameter, a greater gradation is achieved at the transition to the spring section 15.2, so that the spring 15 can be supported better and more reliable on the support shoulder 20.
  • the diameter of the spring 15 is constant, for example.
  • the diameter of the through-channel 17 is larger in the candle area 17.2 than in the block area 17.1.
  • the diameter of the constriction 17.3 is smaller than the diameter of the through-channel 17 in the block area 17.1 and in the candle area 17.2.
  • the diameter of the spring 15 is in one of the contacting of the spark plug 5 serving
  • the turns of the contact region 15.3 of the spring 15 are, for example, on block to each other.
  • the diameter of the spring 15 is in the block section 15.1, for example, slightly smaller than the diameter of the block portion 17.1 of the passage channel 17, but may also be slightly larger, so that the spring 15 is firmly enclosed in the passageway 17 and fixed in the axial and radial directions.
  • the block section 15.1 of the spring 15 is longer by a multiple than the spring section 15.2 and the contact section 15.3 together.

Landscapes

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

Abstract

Les bobines d'allumage comportant une borne haute tension, un ressort pour assurer la connexion électrique de la borne haute tension avec une bougie d'allumage et une enveloppe de protection élastique entourant le ressort sont d'ores et déjà connues. Les spires du ressort sont en appui mutuel en forme de bloc dans une section du bloc tournée vers la borne haute tension et sont espacées les unes des autres la section de ressort prévue pour faire contact avec la bougie d'allumage. Afin de pouvoir emboîter aisément la bobine d'allumage avec l'enveloppe de protection élastique sur la bougie d'allumage, l'enveloppe de protection est renforcée, dans la mesure où deux douilles métalliques sont intégrées dedans. L'inconvénient de bobines d'allumage de ce type est que les douilles métalliques entraînent une majoration des coûts de production et une augmentation du diamètre de l'enveloppe de protection. En outre, la souplesse de l'enveloppe de protection est réduite par les douilles métalliques. Pour pallier ces inconvénients, il est prévu selon l'invention une bobine d'allumage dont la rigidité de l'enveloppe de protection est renforcée sans éléments constitutifs supplémentaires, ce qui permet de réduire les frais de production et de diminuer le diamètre de l'enveloppe de protection. Selon l'invention, il est prévu que la section du bloc (15,1) du ressort (15) s'appuie, à son extrémité tournée vers la section de ressort (15,2) sur au moins un épaulement d'appui (20) de l'enveloppe de protection (16).
EP08760442.7A 2007-06-08 2008-06-03 Bobine d'allumage Active EP2165070B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200710026669 DE102007026669A1 (de) 2007-06-08 2007-06-08 Zündspule
PCT/EP2008/056858 WO2008148765A1 (fr) 2007-06-08 2008-06-03 Bobine d'allumage

Publications (2)

Publication Number Publication Date
EP2165070A1 true EP2165070A1 (fr) 2010-03-24
EP2165070B1 EP2165070B1 (fr) 2017-03-01

Family

ID=39811816

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08760442.7A Active EP2165070B1 (fr) 2007-06-08 2008-06-03 Bobine d'allumage

Country Status (4)

Country Link
EP (1) EP2165070B1 (fr)
CN (1) CN102016290B (fr)
DE (1) DE102007026669A1 (fr)
WO (1) WO2008148765A1 (fr)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009035897A1 (de) 2009-08-03 2011-02-10 Robert Bosch Gmbh Zündspule, Zündkerze sowie Zündanordnung umfassend eine Zündspule und -kerze
DE102011082231A1 (de) 2011-01-12 2012-07-12 Robert Bosch Gmbh Zündspule, insbesondere für kleinbauende Motoren
DE102011006841A1 (de) * 2011-04-06 2012-10-11 Robert Bosch Gmbh Zündspule mit verbessertem Isolationsvermögen
DE102014214074A1 (de) * 2014-07-18 2016-01-21 Robert Bosch Gmbh Wicklungsschema für einen Transformator eines Hochsetzstellers und Zündsystem zur Versorgung einer Funkenstrecke einer Brennkraftmaschine mit elektrischer Energie
JP6375880B2 (ja) * 2014-11-05 2018-08-22 株式会社デンソー 内燃機関用点火コイル
DE102016219281B4 (de) 2016-10-05 2018-12-13 Bayerische Motoren Werke Aktiengesellschaft Zündvorrichtung mit einer Feder zur elektrischen Anbindung einer Zündkerze sowie Verbrennungsmotor und Kraftfahrzeug mit einer solchen
JP6772752B2 (ja) * 2016-10-17 2020-10-21 株式会社デンソー 内燃機関用の点火コイル
CN109586169B (zh) * 2017-09-29 2020-09-15 马歇尔电器公司 用于将火花塞连接到高压源的高压延展器

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5357233A (en) 1991-08-23 1994-10-18 Nippondenso Co., Ltd. Ignition apparatus for internal combustion engine
JP3267097B2 (ja) 1995-04-13 2002-03-18 三菱電機株式会社 電気接続用部材、電気接続用部材を用いた内燃機関点火装置及びその製造方法
JP3623933B2 (ja) * 2001-09-18 2005-02-23 阪神エレクトリック株式会社 内燃機関用点火コイル装置
ATE377706T1 (de) * 2003-03-14 2007-11-15 Delphi Tech Inc Zündspulenanordnung
JP4209400B2 (ja) * 2005-03-23 2009-01-14 三菱電機株式会社 内燃機関用点火装置
JP4209407B2 (ja) * 2005-05-19 2009-01-14 三菱電機株式会社 内燃機関用点火装置

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2008148765A1 *

Also Published As

Publication number Publication date
DE102007026669A1 (de) 2009-01-15
WO2008148765A1 (fr) 2008-12-11
CN102016290B (zh) 2013-03-20
CN102016290A (zh) 2011-04-13
EP2165070B1 (fr) 2017-03-01

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