EP1542246A2 - Bobine d'allumage - Google Patents

Bobine d'allumage Download PDF

Info

Publication number
EP1542246A2
EP1542246A2 EP04025607A EP04025607A EP1542246A2 EP 1542246 A2 EP1542246 A2 EP 1542246A2 EP 04025607 A EP04025607 A EP 04025607A EP 04025607 A EP04025607 A EP 04025607A EP 1542246 A2 EP1542246 A2 EP 1542246A2
Authority
EP
European Patent Office
Prior art keywords
core
ignition coil
electrically conductive
conductive plastic
plastic portion
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
EP04025607A
Other languages
German (de)
English (en)
Other versions
EP1542246A3 (fr
EP1542246B1 (fr
Inventor
Stefan Groezinger
Lothar Detels
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
Priority claimed from DE102004010173A external-priority patent/DE102004010173A1/de
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP1542246A2 publication Critical patent/EP1542246A2/fr
Publication of EP1542246A3 publication Critical patent/EP1542246A3/fr
Application granted granted Critical
Publication of EP1542246B1 publication Critical patent/EP1542246B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
    • H01F27/36—Electric or magnetic shields or screens
    • H01F27/363—Electric or magnetic shields or screens made of electrically conductive material
    • 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
    • H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
    • H01F27/36—Electric or magnetic shields or screens

Definitions

  • the invention is based on an ignition coil of an ignition system of an internal combustion engine according to in the preamble of claim 1 further defined type.
  • Such an ignition coil is known from practice and in particular provides a Kompaktzündspule for controlling a spark plug or a multi-coil for driving of at least two spark plugs of a motor vehicle internal combustion engine operating according to the Otto principle
  • the ignition coil forms an energy storage and transformer, by means of its electrical energy of a comparatively low supply voltage, the usually provided by a DC electrical system of the relevant motor vehicle is converted into magnetic energy, which at a desired time, to which an ignition pulse to the ignition of a fuel mixture in the combustion chamber the internal combustion engine serving spark plug is to be delivered, in a high voltage pulse is implemented.
  • the known Kompaktzündspule comprises a usually made of plastic coil housing, in which a magnetically active, so-called I core of ferromagnetic material, for example, iron, is arranged.
  • the I-core can, for example, cuboid or be formed rod-shaped and is from a first, with the DC electrical system, d. H. connected to a supply voltage, so-called primary winding and of a second, connected to the spark plug, so-called secondary winding enclosed.
  • the Both windings are usually made of copper wire.
  • the known Kompaktzündspule also formed of a ferroelectric material, So-called peripheral core or O-core, which is a magnetic circuit with the I-core forms and encloses the arrangement of the primary winding and the secondary winding.
  • the conversion of the delivered from the DC electrical system of the motor vehicle Voltage in a high voltage is such that a current through the primary winding flows, creating a magnetic field around this winding, which is a specific one Direction and is closed in itself.
  • the built-up magnetic field by switching off the electric current forced to change direction, causing in the Secondary winding, which is formed close to the primary winding and a much larger Winding number, a high electrical voltage results.
  • the ignition coil discharges.
  • a spark current and a spark duration at the ignition of the in the combustion chamber of the internal combustion engine fed fuel mixture the respective Requirements are adjusted.
  • Kompaktzündspulen is located on opposite sides of the ignition coil between the O-core and the ignition coil housing in each case an air gap over which Partial discharges of the O-core can be done by the between the O-core and the Ignition coil housing resulting electric field are caused.
  • the invention is based on the object, an ignition coil of the aforementioned type to create, in which a sufficient endurance running is guaranteed.
  • the ignition coil according to the invention an ignition system of an internal combustion engine with the Characteristics according to the preamble of claim 1, wherein ignition coil between the coil housing and the peripheral core at least partially electrically at least partially conductive plastic portion is arranged, which is electrically connected to the peripheral core is and free of air gap adjacent to the coil housing, has the advantage that at least in the areas in which the at least one plastic section is arranged between the peripheral core or O-core and the coil housing no effective over air electrical Field can build and so in these areas no partial discharge of the O-core over the coil housing and thus no material degradation takes place. Rather, a reduced Partial discharge over the shortest available air gap between the O-core and the coil housing.
  • the electrically conductive plastic section can be made by applying a spraying method so be connected to the made of plastic bobbin case that is between them no air gap is formed on both components.
  • the compound can be made, for example be that first, the at least one electrically conductive plastic section on molded on the peripheral core and then with the electrically conductive plastic section provided circumferential core is injected into the coil housing.
  • the ignition coil according to the invention covers the electrically conductive plastic section, the inner side of the peripheral core at least partially, and preferably at least at the locations where an excessive material degradation could lead to failure of the ignition coil. But it is also conceivable, in several, each one pivot point of the housing performing areas each one electrically provide conductive plastic section.
  • the electrically conductive plastic portion has, for example, a thickness between 0.1 mm and 2.5 mm and preferably about 0.5 mm. But it is also possible, the electrically conductive Plastic section form thinner and in the form of an optionally partially formed, thin electrically conductive plastic layer on the peripheral core or to apply on the housing.
  • the electric conductive plastic portion has a substantially U-shaped cross-section.
  • the base portion of the electrically conductive plastic portion production technology conditionally spaced over a minimum air gap to the peripheral core, whereas the flanks of the plastic section abut the peripheral core and that for potential equalization make required electrical connection.
  • the electrically conductive Plastic section is thus arranged in a clip-like manner on the inside of the peripheral core in this case and formed as a plastic body.
  • the Ignition coil 10 is used to supply a spark plug, also not shown here with high voltage pulses, so that a contained in the combustion chamber of the internal combustion engine Air / fuel mixture can be ignited.
  • the designed as Kompaktzündspule ignition coil 10 comprises a housing 12, which consists of a electrically insulating plastic 12 is made and in which in a central position a soft magnetic, cuboid I-core 14 is arranged, which consists of a packetized sheet or layered Electrical sheet exists.
  • the primary winding 18 is of a concentrically arranged, second bobbin 21st surrounded on which a copper wire formed, so-called secondary winding 22 wound is that with a connectable to the spark plug high voltage connection 24 of the ignition coil 10 is connected.
  • the I-core, the primary winding 18, the bobbin 21 and the secondary winding 22 form a structural unit, which is cast in casting resin, not shown here in detail and so in the housing 12 is fixed.
  • the housing 12 is further at the level of the I-core 14 of a so-called peripheral core or O-core 26 enclosed, which also consists of packetized sheet or layered Electromagnetic sheet is made and connected to the I-core to form a magnetic circuit is.
  • O-core At its side remote from the low-voltage terminal 20, the O-core has 26 a screw-on 27, which serves for grounding.
  • the O-core 26 has a substantially rectangular plan and bears on its inside a formed from an electrically conductive plastic plastic portion 28, the a substantially U-shaped plan and a substantially U-shaped cross-section has, whose edges are positively connected to the O-core 26 in conjunction, so that ensures electrical contact between the O-core 26 and the plastic portion 28 is.
  • the plastic portion 28 In the area of its base, i. on the inside of the O-core 26, is the plastic portion 28 due to production over a minimum air gap to the O-core spaced.
  • the plastic section 28 molded onto the O-core 26 has, for example, a thickness of about 0.5mm and is form-fitting with the housing 12, d. H. connected without air gap.
  • the electrically conductive plastic portion 28 in the form of an independent Plastic body formed and, for example, as a prefabricated clip on the inside of the O-core 28 to be locked.
  • the plastic portion 28 may also be in the form of a plastic layer made, for example by vapor deposition or by galvanic means, on the housing or the peripheral core be educated.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Ignition Installations For Internal Combustion Engines (AREA)
EP04025607.5A 2003-12-09 2004-10-28 Bobine d'allumage Expired - Lifetime EP1542246B1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE10357351 2003-12-09
DE10357351 2003-12-09
DE102004010173 2004-03-02
DE102004010173A DE102004010173A1 (de) 2004-03-02 2004-03-02 Zündspule

Publications (3)

Publication Number Publication Date
EP1542246A2 true EP1542246A2 (fr) 2005-06-15
EP1542246A3 EP1542246A3 (fr) 2011-11-16
EP1542246B1 EP1542246B1 (fr) 2015-03-04

Family

ID=34524063

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04025607.5A Expired - Lifetime EP1542246B1 (fr) 2003-12-09 2004-10-28 Bobine d'allumage

Country Status (2)

Country Link
EP (1) EP1542246B1 (fr)
JP (1) JP4732742B2 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106128730A (zh) * 2016-07-21 2016-11-16 昆山凯迪汽车电器有限公司 点火线圈

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007010602A1 (fr) * 2005-07-20 2007-01-25 Mitsubishi Denki Kabushiki Kaisha Coupleur par induction d'un système de communication à porteuse sur ligne de transport d'énergie
JP4410198B2 (ja) * 2006-02-07 2010-02-03 三菱電機株式会社 内燃機関用点火装置
DE102008040146B4 (de) 2007-07-04 2023-03-30 Denso Corporation Zündspule
KR101560738B1 (ko) 2009-02-11 2015-10-16 삼성전자 주식회사 유기 에어로젤, 이의 형성용 조성물 및 이의 제조방법

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61137309A (ja) * 1984-12-08 1986-06-25 Nissin Electric Co Ltd ガス絶縁計器用変圧器
JPS63119211A (ja) * 1986-11-07 1988-05-23 Hitachi Ltd 内燃機関用点火コイル
FR2657995B1 (fr) * 1990-02-07 1994-08-05 Valeo Electronique Bobine d'allumage, notamment pour moteur a combustion interne de vehicule automobile.
JP2981702B2 (ja) * 1992-08-27 1999-11-22 愛三工業株式会社 内燃機関用点火コイル
JPH07326531A (ja) * 1994-05-31 1995-12-12 Murata Mfg Co Ltd フライバックトランス
JPH0982538A (ja) * 1995-09-19 1997-03-28 Hitachi Ltd 内燃機関用点火コイル

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106128730A (zh) * 2016-07-21 2016-11-16 昆山凯迪汽车电器有限公司 点火线圈
CN106128730B (zh) * 2016-07-21 2018-10-23 昆山凯迪汽车电器有限公司 点火线圈

Also Published As

Publication number Publication date
JP4732742B2 (ja) 2011-07-27
EP1542246A3 (fr) 2011-11-16
JP2005175470A (ja) 2005-06-30
EP1542246B1 (fr) 2015-03-04

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