EP0034955A1 - Zündspule für Verbrennungsmotoren - Google Patents

Zündspule für Verbrennungsmotoren Download PDF

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Publication number
EP0034955A1
EP0034955A1 EP81400073A EP81400073A EP0034955A1 EP 0034955 A1 EP0034955 A1 EP 0034955A1 EP 81400073 A EP81400073 A EP 81400073A EP 81400073 A EP81400073 A EP 81400073A EP 0034955 A1 EP0034955 A1 EP 0034955A1
Authority
EP
European Patent Office
Prior art keywords
branch
permanent magnet
ignition coil
branches
circuit
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
EP81400073A
Other languages
English (en)
French (fr)
Other versions
EP0034955B1 (de
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
Priority claimed from FR8003653A external-priority patent/FR2476218A1/fr
Priority claimed from FR8009742A external-priority patent/FR2481753A2/fr
Application filed by Ducellier et Cie filed Critical Ducellier et Cie
Publication of EP0034955A1 publication Critical patent/EP0034955A1/de
Application granted granted Critical
Publication of EP0034955B1 publication Critical patent/EP0034955B1/de
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
    • H01F3/00—Cores, Yokes, or armatures
    • H01F3/10—Composite arrangements of magnetic circuits
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F29/00—Variable transformers or inductances not covered by group H01F21/00
    • H01F29/14—Variable transformers or inductances not covered by group H01F21/00 with variable magnetic bias
    • H01F29/146—Constructional details
    • 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 a motor vehicle, coil comprising a closed magnetic circuit made up of a plurality of sheets, magnetic circuit in which is arranged in one of the permanent branches, a winding primary and a secondary winding surrounding another of the branches.
  • a closed magnetic circuit made up of a plurality of sheets, magnetic circuit in which is arranged in one of the permanent branches, a winding primary and a secondary winding surrounding another of the branches.
  • An embodiment of a coil with a closed magnetic circuit is known, embodiment, in which a permanent magnet is arranged perpendicular to the flux flowing in the circuit, the permanent magnet being magnetized in the direction of its thickness so that the the magnetic flux it generates is opposite to the flux produced by the primary winding when it is supplied.
  • This permanent magnet is located in the branch opposite to the branch surrounded by the primary and secondary windings.
  • One of the drawbacks of this circuit consisting of two U-shaped parts arranged facing each other, is that the dimensions of the permanent magnet, apart from its thickness, are a function of the section of the magnetic circuit.
  • This quality which is involved in the reluctance of the circuit is dependent on the differences in thickness of the permanent magnet disposed opposite the branch surrounding the windings, which differences in thickness are inherent in any mass production.
  • an ignition coil comprising a magnetic circuit, consisting of a plurality of sheets, and a permanent magnet disposed in one of the branches of said circuit, characterized in that that said circuit comprises, at least, a magnetic seal disposed along a plane forming an acute angle ⁇ with the plane of the faces of the permanent magnet adjacent to said circuit.
  • the branch on which the primary winding and the secondary winding are arranged is of thickness less than the thickness of the other branches of the magnetic circuit.
  • At least one magnetic seal is placed at one end of the branch surrounded by the primary and secondary windings.
  • a fraction of the sheets, constituting the half-branches covers on both sides of the windings, the ends of the branch on which the windings are arranged.
  • a magnetic circuit of this kind is known, in particular, from French patent application No. 72,02568 of 26.1.1972.
  • a second embodiment of the ignition coil according to the invention is characterized in that one of the half-branches, constituting the branch in which the magnet is arranged, is provided at one of its ends, d 'A spoiler whose depth creates an air gap E, of predetermined value, between the two half-branches, which air gap E is located in the extension of the permanent magnet at one of its faces.
  • Said circuif is also characterized in that another air gap E ', of predetermined value, is created between the edge of the sheets which constitute the small base of the rectangular trapezium of the portion of one of the half-branches adjacent to the permanent magnet and the song of the sheets of the other half-branch.
  • a primary winding 4 and a secondary winding 5 surround the branch 6 which branch 6 is in this embodiment, consisting of a fraction of the sheets constituting the half-branch 3a, forming with the half-branch 3 ⁇ the branch 3.
  • the thickness E ′ of branch 6 (see FIG. 2) is, in this embodiment less than twice the thickness E of branch 3.
  • a magnetic seal 7 (see Figure 1) is provided at one end of the branch 6, which seal 7 is arranged in a plane forming an acute angle ⁇ with the plane of the adjacent faces 2a and 2b of the permanent magnet 2 to the half branches 3a and 3b.
  • the half-branches 3a and 3b are made up of sheets of unequal lengths, so that a fraction of these sheets covers, on either side of the primary 4 and secondary 5 windings, the ends of the branch 6.
  • this magnetic circuit eliminates the drawbacks cited in the prior art, by the fact that a large surface permanent magnet is provided in a magnetic circuit whose weight and size have been reduced to a minimum, compatible with the performance of the ignition coil.
  • the large thickness E of the half-branches in which the permanent magnet is placed allows a significant reduction in the perimeter of the magnetic circuit and, correspondingly, a reduced size of the ignition coil.
  • the magnetic seal located at one end of the branch surrounded by the primary and secondary windings, and forming an acute angle ⁇ with the plane of the faces adjacent to the permanent magnet absorbs the thickness differences of the permanent magnet due to manufacturing tolerances and also the cutting tolerances of the sheets constituting the magnetic circuit.
  • This first embodiment has the drawback, however, that the flow reversal created in the branch surrounded by the primary and secondary windings by the current flowing in the primary winding requires the use of a magnet having a very coercive field. high so as to avoid demagnetization when the flux is reversed.
  • the second embodiment of the magnetic circuit according to the invention aims to remedy this drawback.
  • an air gap E of predetermined value is created between the half-branch 3a and the half-branch 3b by a spoiler 3c forming a projection at one of the ends of the half-branch 3b.
  • the air gap E is located in the extension of the magnet 2 at its face 2b,
  • Another air gap E ' is created between the edge of the sheets, of the half-branch 3b, constituting the small base 3d, of the portion, of said half-branch, having a view from above of the appearance d 'a rectangular trapezoid and the third song of the sheets of the half-branch 3a.
  • the ignition coil may, depending on the performance required, such as for example a strong choke, have a magnetic circuit comprising either the air gap E or the air gap E ', or else comprise both the air gaps E and E'.
  • the particular configuration of the magnetic circuit, according to this second embodiment ensures that despite the use for reasons of economy and supply, permanent magnets of large surface area and low coercive field, the weight and size of the ignition coil have been reduced to the maximum compatible with the required performance.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Composite Materials (AREA)
  • Ignition Installations For Internal Combustion Engines (AREA)
EP81400073A 1980-02-20 1981-01-21 Zündspule für Verbrennungsmotoren Expired EP0034955B1 (de)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
FR8003653A FR2476218A1 (fr) 1980-02-20 1980-02-20 Bobine d'allumage pour moteurs a combustion interne
FR8003653 1980-02-20
FR8009742A FR2481753A2 (fr) 1980-04-30 1980-04-30 Bobine d'allumage pour moteurs a combustion interne
FR8009742 1980-04-30

Publications (2)

Publication Number Publication Date
EP0034955A1 true EP0034955A1 (de) 1981-09-02
EP0034955B1 EP0034955B1 (de) 1984-10-24

Family

ID=26221613

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81400073A Expired EP0034955B1 (de) 1980-02-20 1981-01-21 Zündspule für Verbrennungsmotoren

Country Status (3)

Country Link
EP (1) EP0034955B1 (de)
DE (1) DE3166748D1 (de)
ES (1) ES499553A0 (de)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0335142A1 (de) * 1988-03-29 1989-10-04 VOGT electronic Aktiengesellschaft Schaltnetztransformator
FR2778490A1 (fr) * 1998-05-11 1999-11-12 Sagem Bobine d'allumage pour moteur a combustion interne
EP1174595A1 (de) * 2000-07-18 2002-01-23 Peugeot Citroen Automobiles SA Ventilaktuator in einer Brennkraftmaschine
EP1174596A1 (de) * 2000-07-20 2002-01-23 Peugeot Citroen Automobiles SA Elektromagnetischer Hubventilaktuator in einer Brennkraftmaschine
FR2819623A1 (fr) * 2001-01-17 2002-07-19 Sagem Bobine d'allumage pour moteur a combustion interne
DE10159112A1 (de) * 2001-12-01 2003-06-18 Hella Kg Hueck & Co Zündtransformator für eine Gasentladungslampe in einem Kraftfahrzeug
FR2839580A1 (fr) * 2002-05-10 2003-11-14 Johnson Contr Automotive Elect Bobine d'allumage a aimant permanent a court-circuit magnetique
EP2001028A1 (de) * 2007-06-08 2008-12-10 ABB Oy Schutz permanenter Magneten in einem Gleichstrominduktor
WO2011159406A1 (en) * 2010-06-15 2011-12-22 Federal-Mogul Ignition Company Ignition coil with energy storage and transformation

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2168919A3 (de) * 1972-01-26 1973-09-07 Ducellier & Cie

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL76967C (de) * 1951-04-23
NL79888C (de) * 1951-04-23
FR66586E (fr) * 1954-06-16 1957-04-16 App Marchal Soc D Expl Const D Transformateur dit <<bobine>> d'allumage
DE1464202A1 (de) * 1962-02-23 1969-05-22 Licentia Gmbh Permanentvormagnetisiertes induktives Element
DE2226289A1 (de) * 1971-05-11 1973-01-04 Tdk Electronics Co Ltd Vormagnetisierter magnetkern

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2168919A3 (de) * 1972-01-26 1973-09-07 Ducellier & Cie

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0335142A1 (de) * 1988-03-29 1989-10-04 VOGT electronic Aktiengesellschaft Schaltnetztransformator
FR2778490A1 (fr) * 1998-05-11 1999-11-12 Sagem Bobine d'allumage pour moteur a combustion interne
EP1174595A1 (de) * 2000-07-18 2002-01-23 Peugeot Citroen Automobiles SA Ventilaktuator in einer Brennkraftmaschine
FR2812024A1 (fr) * 2000-07-18 2002-01-25 Peugeot Citroen Automobiles Sa Actionneur de soupapes de moteurs a combustion interne
EP1174596A1 (de) * 2000-07-20 2002-01-23 Peugeot Citroen Automobiles SA Elektromagnetischer Hubventilaktuator in einer Brennkraftmaschine
FR2812025A1 (fr) * 2000-07-20 2002-01-25 Peugeot Citroen Automobiles Sa Actionneur electromagnetique de soupape de moteur a combustion interne
FR2819623A1 (fr) * 2001-01-17 2002-07-19 Sagem Bobine d'allumage pour moteur a combustion interne
DE10159112A1 (de) * 2001-12-01 2003-06-18 Hella Kg Hueck & Co Zündtransformator für eine Gasentladungslampe in einem Kraftfahrzeug
FR2839580A1 (fr) * 2002-05-10 2003-11-14 Johnson Contr Automotive Elect Bobine d'allumage a aimant permanent a court-circuit magnetique
EP2001028A1 (de) * 2007-06-08 2008-12-10 ABB Oy Schutz permanenter Magneten in einem Gleichstrominduktor
US8035470B2 (en) 2007-06-08 2011-10-11 Abb Oy Protection of permanent magnets in a DC-inductor
CN101364472B (zh) * 2007-06-08 2011-12-14 Abb有限公司 直流感应器
WO2011159406A1 (en) * 2010-06-15 2011-12-22 Federal-Mogul Ignition Company Ignition coil with energy storage and transformation
US8289117B2 (en) 2010-06-15 2012-10-16 Federal-Mogul Corporation Ignition coil with energy storage and transformation
CN102939635A (zh) * 2010-06-15 2013-02-20 费德罗-莫格尔点火公司 用于能量储存和转换的点火线圈

Also Published As

Publication number Publication date
DE3166748D1 (en) 1984-11-29
EP0034955B1 (de) 1984-10-24
ES8200744A1 (es) 1981-12-01
ES499553A0 (es) 1981-12-01

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