EP0043744B1 - Bobine d'allumage pour moteur à combustion interne - Google Patents

Bobine d'allumage pour moteur à combustion interne Download PDF

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Publication number
EP0043744B1
EP0043744B1 EP19810400884 EP81400884A EP0043744B1 EP 0043744 B1 EP0043744 B1 EP 0043744B1 EP 19810400884 EP19810400884 EP 19810400884 EP 81400884 A EP81400884 A EP 81400884A EP 0043744 B1 EP0043744 B1 EP 0043744B1
Authority
EP
European Patent Office
Prior art keywords
ignition coil
plates
arm
circuit
branch
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
Application number
EP19810400884
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0043744A1 (fr
Inventor
Jean Marie Pierret
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.)
Ducellier et Cie
Original Assignee
Ducellier et Cie
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 Ducellier et Cie filed Critical Ducellier et Cie
Publication of EP0043744A1 publication Critical patent/EP0043744A1/fr
Application granted granted Critical
Publication of EP0043744B1 publication Critical patent/EP0043744B1/fr
Expired 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
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/24—Magnetic cores
    • H01F27/26—Fastening parts of the core together; Fastening or mounting the core on casing or support
    • H01F27/266—Fastening or mounting the core on casing or support
    • 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

Definitions

  • the present invention relates to an ignition coil for an internal combustion engine, in particular for motor vehicles, an ignition coil of the type comprising a closed magnetic circuit, primary and secondary windings, surrounding one of the branches of said circuit, and a permanent magnet disposed in another branch, which other branch is provided with a circuit for bypassing the magnetic flux created by the primary winding.
  • European patent application No. 0034955 describes, in a first embodiment, a closed magnetic circuit for an ignition coil, which magnetic circuit has the disadvantage of requiring the use of a permanent magnet with a very high coercive field for avoid demagnetization of said magnet during the reversal of flux.
  • the second embodiment of the aforementioned application remedies this drawback and provides, for this purpose, a magnetic circuit in which a bypass circuit comprises a gap of determined size, which gap is formed at one of the ends of the branch in which is arranged the permanent magnet.
  • the means for fixing the ignition coil generally consisting of a flange provided with openings for fixing to the vehicle, by means of screws provided for this purpose, do not participate magnetically in the characteristics of the magnetic circuit, which is not advantageous with regard to savings in material and cost.
  • the present invention aims to remedy this drawback and relates, for this purpose, to an ignition coil of the type comprising a closed magnetic circuit, primary and secondary windings, surrounding one of the branches of said circuit, and a permanent magnet disposed in another branch provided with a magnetic flux bypass circuit, characterized in that the magnetic flux bypass circuit consists of sheets, of mild steel, arranged on either side of the branch; in that insulating plates of thickness d are interposed between these sheets and this branch, in which the magnet is disposed; in that the sheets hold this permanent magnet and this branch by known assembly means, and in that at least one of the sheets, constituting the bypass circuit of the magnetic flux, comprises an extension provided, at least, with an opening for fixing said coil to the vehicle.
  • Fig. 1 is a top view, in partial section, of an ignition coil according to the invention.
  • Fig. 2 is a side view of the coil of FIG. 1.
  • the ignition coil fig. 1 and 2
  • the ignition coil comprises a closed magnetic circuit 1 which, in this embodiment, consists of a plurality of sheets stacked on top of each other.
  • a permanent magnet magnetized in the direction of its thickness, is placed in a branch 3 of said circuit 1.
  • a primary winding 4 and a secondary winding 5 surround the branch 6 which, in this exemplary embodiment, consists of a fraction of the sheets constituting the half-branch 3a forming, with the half-branch 3b, the branch 3.
  • the magnetic flux bypass circuit consists of sheets 7 and 8, of mild steel, spaced apart from each other by a distance E and arranged, by means of insulating plates 9 and 10 of thickness d, on either side of branch 3.
  • the sheets 7 and 8, made of mild steel, and the insulating plates 9 and 10 hold the permanent magnet 2 and the portion of the magnetic circuit constituting the branch 3, by means of known assembly means, such as the rivets 11 and 12 for example.
  • the sheets 7 and 8 each have an extension 7a and 8a, which extensions are provided with openings (not shown) which secure the ignition coil to the vehicle or to an intermediate support by means of screws for example.
  • said attachment can be ensured with a single extension on one of the sheets 7, 8, the other sheet then having the shape of a simple plate.
  • the insulating plates 9 and 10 can be constituted by an insulating coating of the sheets 7 and 8.

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)
EP19810400884 1980-07-04 1981-06-03 Bobine d'allumage pour moteur à combustion interne Expired EP0043744B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8014894 1980-07-04
FR8014894A FR2486160A1 (fr) 1980-07-04 1980-07-04 Perfectionnement aux bobines d'allumage pour moteurs a combustion interne

Publications (2)

Publication Number Publication Date
EP0043744A1 EP0043744A1 (fr) 1982-01-13
EP0043744B1 true EP0043744B1 (fr) 1984-03-07

Family

ID=9243842

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19810400884 Expired EP0043744B1 (fr) 1980-07-04 1981-06-03 Bobine d'allumage pour moteur à combustion interne

Country Status (4)

Country Link
EP (1) EP0043744B1 (es)
DE (1) DE3162497D1 (es)
ES (1) ES503561A0 (es)
FR (1) FR2486160A1 (es)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2531751A1 (fr) * 1982-08-11 1984-02-17 Ducellier & Cie Bobine d'allumage pour moteur a combustion interne
DE3505367A1 (de) * 1985-02-15 1986-08-28 Daimler-Benz Ag, 7000 Stuttgart Zuendspule fuer brennkraftmaschinen
JP3391049B2 (ja) * 1993-06-18 2003-03-31 株式会社デンソー 点火コイル

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2720065A1 (de) * 1977-05-05 1978-11-09 Bosch Gmbh Robert Anordnung von zuendspulen
JPS5450733A (en) * 1977-09-30 1979-04-20 Hitachi Ltd Ignitor for internal combustion engine
IT1101065B (it) * 1978-11-13 1985-09-28 Magneti Marelli Spa Bobina d'accensione per autoveicoli

Also Published As

Publication number Publication date
FR2486160A1 (fr) 1982-01-08
FR2486160B1 (es) 1982-12-10
ES8205039A1 (es) 1982-05-16
ES503561A0 (es) 1982-05-16
DE3162497D1 (en) 1984-04-12
EP0043744A1 (fr) 1982-01-13

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