EP0418137A1 - Zündspule, besonders für Brennkraftmaschinen von Kraftfahrzeugen - Google Patents

Zündspule, besonders für Brennkraftmaschinen von Kraftfahrzeugen Download PDF

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Publication number
EP0418137A1
EP0418137A1 EP90402486A EP90402486A EP0418137A1 EP 0418137 A1 EP0418137 A1 EP 0418137A1 EP 90402486 A EP90402486 A EP 90402486A EP 90402486 A EP90402486 A EP 90402486A EP 0418137 A1 EP0418137 A1 EP 0418137A1
Authority
EP
European Patent Office
Prior art keywords
voltage
magnetic flux
magnetic
return circuit
ignition coil
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
EP90402486A
Other languages
English (en)
French (fr)
Other versions
EP0418137B1 (de
Inventor
Eric Badaud
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.)
Sagem SA
Original Assignee
Sagem Allumage SA
Valeo Electronique SA
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 Sagem Allumage SA, Valeo Electronique SA filed Critical Sagem Allumage SA
Publication of EP0418137A1 publication Critical patent/EP0418137A1/de
Application granted granted Critical
Publication of EP0418137B1 publication Critical patent/EP0418137B1/de
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

Definitions

  • the present invention relates to an ignition coil, in particular for an internal combustion engine of a motor vehicle.
  • the secondary of such a coil produces a very high voltage making it possible to generate an electric arc at the electrodes of the spark plugs, thus igniting the oxidizing mixture contained in the cylinders of the engine.
  • a single coil controls all the spark plugs via, for example, a mechanical distributor, generally of the rotating finger type.
  • the present invention relates more particularly to such a coil, known as a single-cylinder which comprises in a manner known per se, a closed circuit magnetic assembly comprising a central magnetic core around which are coaxially arranged two coils of plastic material carrying the primary and secondary windings, this assembly being integrated in a molded plastic housing. Synthetic resin, cast inside the case and electrically insulates the different elements of the ignition coil from each other.
  • an ignition coil in particular for an internal combustion engine of a motor vehicle, comprising, integrated into a housing, a magnetic assembly consisting in particular of a magnetic core housed in a primary coil, a secondary coil. coaxial with the primary coil, primary and secondary windings, a magnetic flux return circuit, a high-voltage link assembly comprising in particular a high-voltage bracket, a high-voltage guide in which is housed a high-output outlet voltage, characterized in that said magnetic flux return circuit comprises at least three orthogonal parts two by two forming in section a U, constituting the three sides of a rectangle in which is inscribed said magnetic flux return circuit, and in that said high-voltage output member is arranged so that it occurs in a direction passing through the c between said rectangle.
  • said rectangle is formed by the housing and the magnetic flux return circuit which is U-shaped, the branches of which extend beyond one of the faces of the central core.
  • the high-voltage output member is centered relative to the fixing points of the coil which are located at the four corners of said rectangle.
  • a single-cylinder ignition coil according to the invention comprises a closed magnetic circuit comprising a primary winding 1 wound around a primary coil 2.
  • the secondary assembly S is held in lift on and around the primary assembly P.
  • the primary P and secondary S assemblies being assembled one inside the other, the magnetic circuit thus formed is introduced into the housing 6 of a housing 7 made of insulating material.
  • a magnetic flux return circuit 8 made up of cut and laminated magnetic sheets is incorporated by molding in the housing 7.
  • said magnetic flux return circuit comprises three orthogonal portions 8 a, 8 b, 8 c pairwise section in a U constituting the three sides of a rectangle.
  • the branches 8 a , 8 b of the U constituting the magnetic flux return circuit 8 do not extend beyond the central magnetic core 3, that is to say that their ends correspond to line XX, shown in Figure 1.
  • the branches 8 a , 8 b are extended by a length 1 beyond the line XX ′ corresponding to one of the faces of the central magnetic core 3.
  • the magnetic flux return circuit 8 and therefore the housing 7 in which it is molded completely encompasses the secondary coil 5 and therefore the primary P and secondary S magnetic assemblies.
  • this extension of the branches 8 a , 8 b has an additional heat exchange surface and therefore allows better cooling of the entire ignition coil.
  • This particular arrangement also allows the magnetic flux return circuit 8 to have a general rectangular outline in combination with the housing 7 facilitating the fixing of the entire ignition coil to the engine block.
  • This fixing is provided by screws (not shown) passing through holes 10 a , 10 b , 10 c , 10 d formed at the four corners of the rectangle formed by the magnetic flux return circuit 8.
  • said magnetic flux return circuit 8 comprises the means for fixing the ignition coil and constitutes the metal frame of the housing 7.
  • a connector 11, made integral with the housing 7 by overmolding allows the low voltage supply of the coil.
  • the high-voltage output assembly of the ignition coil comprises a high-voltage bracket 12 consisting of a barrel 13 of generally cylindrical shape connecting to a strip 14 by means of two sails 15, 6, said strip 14 comprising two pawns 17,18.
  • the high-voltage output assembly also includes a high-voltage guide 19 which is in the general form of a tube, one of its ends of which is extended by a horizontal tongue 20 made from material, this tongue having a vertical tab. 21.
  • a spring 22 constituting the high-voltage output member is introduced into the high-voltage guide 19 until it comes into abutment against the tongue 20.
  • the high-voltage guide 19 fitted with the spring 22 is introduced inside the barrel 13 of the high-voltage bracket 12 and is fixed therein by a latching system which, not forming part of the present invention, was not represented.
  • This high-voltage connection assembly thus produced is positioned in the housing 7 on the secondary coil 4 already installed.
  • Resin is then poured into the housing 6 of the housing 7 and the hardening of the resin immobilizes all the constituents by isolating them from each other.
  • the general design of the ignition coil is such that, according to the invention, the axis YY ′ of the high-voltage output member, constituted here by the spring 19 , is centered relative to the rectangle constituted by the magnetic flux return circuit 8, the axis YY ′ being located at a point corresponding to the crossing of the diagonals of said rectangle, diagonals on which there are the fixing holes 10 a , 10 b , 10 c , 10 d .

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Ignition Installations For Internal Combustion Engines (AREA)
EP19900402486 1989-09-15 1990-09-11 Zündspule, besonders für Brennkraftmaschinen von Kraftfahrzeugen Expired - Lifetime EP0418137B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8912088 1989-09-15
FR8912088A FR2652195B1 (fr) 1989-09-15 1989-09-15 Bobine d'allumage, en particulier pour moteur a combustion interne de vehicule automobile.

Publications (2)

Publication Number Publication Date
EP0418137A1 true EP0418137A1 (de) 1991-03-20
EP0418137B1 EP0418137B1 (de) 1994-01-12

Family

ID=9385503

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19900402486 Expired - Lifetime EP0418137B1 (de) 1989-09-15 1990-09-11 Zündspule, besonders für Brennkraftmaschinen von Kraftfahrzeugen

Country Status (5)

Country Link
EP (1) EP0418137B1 (de)
JP (1) JPH03108305A (de)
DE (1) DE69005955T2 (de)
ES (1) ES2048464T3 (de)
FR (1) FR2652195B1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1992022744A1 (de) * 1991-06-13 1992-12-23 Robert Bosch Gmbh Spulenkern mit massekontaktierung
FR2716238A1 (fr) * 1994-02-17 1995-08-18 Bosch Gmbh Robert Bobine d'allumage pour un moteur à combustion interne comportant un noyau principal entouré par un noyau de refluement.

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1608891A (en) * 1926-02-03 1926-11-30 North East Electric Co Ignition coil
EP0066749A1 (de) * 1981-06-01 1982-12-15 Aisin Seiki Kabushiki Kaisha Zündsystem für Brennkraftmaschinen mit innerer Verbrennung
GB2173047A (en) * 1985-03-25 1986-10-01 Hitachi Ltd An ignition coil assembly for an internal combustion engine

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1608891A (en) * 1926-02-03 1926-11-30 North East Electric Co Ignition coil
EP0066749A1 (de) * 1981-06-01 1982-12-15 Aisin Seiki Kabushiki Kaisha Zündsystem für Brennkraftmaschinen mit innerer Verbrennung
GB2173047A (en) * 1985-03-25 1986-10-01 Hitachi Ltd An ignition coil assembly for an internal combustion engine

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1992022744A1 (de) * 1991-06-13 1992-12-23 Robert Bosch Gmbh Spulenkern mit massekontaktierung
AU651449B2 (en) * 1991-06-13 1994-07-21 Robert Bosch Gmbh Coil core with earth contact
US5398014A (en) * 1991-06-13 1995-03-14 Robert Bosch Gmbh Core having earth contacting
FR2716238A1 (fr) * 1994-02-17 1995-08-18 Bosch Gmbh Robert Bobine d'allumage pour un moteur à combustion interne comportant un noyau principal entouré par un noyau de refluement.
US5497756A (en) * 1994-02-17 1996-03-12 Robert Bosch Gmbh Ignition coil for an internal combustion engine
ES2116876A1 (es) * 1994-02-17 1998-07-16 Bosch Gmbh Robert Bobina de encendido para un motor de combustion interna.
DE4404957C2 (de) * 1994-02-17 2003-08-21 Bosch Gmbh Robert Zündspule für eine Brennkraftmaschine

Also Published As

Publication number Publication date
FR2652195A1 (fr) 1991-03-22
FR2652195B1 (fr) 1992-01-31
JPH03108305A (ja) 1991-05-08
ES2048464T3 (es) 1994-03-16
EP0418137B1 (de) 1994-01-12
DE69005955D1 (de) 1994-02-24
DE69005955T2 (de) 1994-07-07

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