EP0418136A1 - Hochspannungsanschlussvorrichtung für eine Zündspule, insbesondere für Brennkraftmaschinen von Kraftfahrzeugen - Google Patents

Hochspannungsanschlussvorrichtung für eine Zündspule, insbesondere für Brennkraftmaschinen von Kraftfahrzeugen Download PDF

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Publication number
EP0418136A1
EP0418136A1 EP90402485A EP90402485A EP0418136A1 EP 0418136 A1 EP0418136 A1 EP 0418136A1 EP 90402485 A EP90402485 A EP 90402485A EP 90402485 A EP90402485 A EP 90402485A EP 0418136 A1 EP0418136 A1 EP 0418136A1
Authority
EP
European Patent Office
Prior art keywords
voltage
ignition coil
housing
guide
bracket
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
EP90402485A
Other languages
English (en)
French (fr)
Other versions
EP0418136B1 (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 EP0418136A1 publication Critical patent/EP0418136A1/de
Application granted granted Critical
Publication of EP0418136B1 publication Critical patent/EP0418136B1/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
    • 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
    • H01F2038/122—Ignition, e.g. for IC engines with rod-shaped core

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 block.
  • 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 so-called single-cylinder coil which comprises a closed circuit magnetic assembly, comprising a central magnetic core around which are coaxially arranged two plastic coils carrying the primary and secondary windings, this assembly being integrated in a molded plastic housing. Synthetic resin, poured inside the case, secures and electrically insulates between them the different elements constituting the ignition coil.
  • One of the problems to be solved on an ignition coil of this type is the realization of the high-voltage connection which allows the connection between the end of the secondary winding and the corresponding spark plug and in particular the output member. high voltage which is in direct contact with the spark plug with which the coil is associated.
  • This outlet member usually consists of a carbon maintained in contact with the end of the spark plug by the action of a spring.
  • Such charcoal is inevitably subject to wear and embrittlement due in particular to the high temperatures to which it is subjected.
  • 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 constituting a metal frame, a high-voltage connection assembly comprising in particular an insert fixed in the secondary coil, a high-voltage bracket, a high-voltage guide in which the high-voltage output member is housed, characterized in that this member consists of a spring.
  • the fixing of the various elements constituting the high-voltage connection and in particular the output member is ensured by the resin which is poured inside the case.
  • FIGS. 1 to 3 represent a high-voltage bracket 1 molded from insulating plastic material such as P.B.T.
  • This bracket 1 consists of a barrel 2 of generally cylindrical shape inside which a cylindrical housing 3 opening at one end of the barrel by an opening 4 whose diameter is smaller to that of the housing 3, thus providing inside the said housing 3 a shoulder 5.
  • the barrel 2 comprises a collar 6 made of material and projecting with respect to the external surface of the barrel 2.
  • the end of the barrel 2, opposite the end comprising the opening 4, is connected to a bar 7 by means of two sails 8 and 9 reinforced by ribs, respectively 10 and 11.
  • the bar 7 has two pins 12 and 13.
  • the wall of the barrel 2 opposite the bar 7 has an outlet 14 whose shape is shown on an enlarged scale in FIG. 3.
  • This outlet 14 comprises from the face 15 a conical flare 16 formed by the walls 16,17, a first slot formed by the walls 18 and 19 and a second slot formed by the walls 20 and 21, this second slot being wider than the first.
  • FIGS. 4 to 6 represent a high-voltage guide 25 produced from a plate of conductive material such as for example brass by cutting and stamping.
  • This high-voltage guide 25 is in the general form of a tube 26, the wall of which is extended at one of its ends by a horizontal tongue 27 comprising a vertical tab 28 whose end 29 is of smaller width.
  • Figures 7 to 9 show a high-voltage insert 30, made of conductive metal such as brass.
  • This insert 30 comprises a base 31 on one of the faces of which is formed a boss 32 in the center of which a slot 33 is arranged.
  • the base 31, the boss 32 and the slot 33 are of generally rectangular shape.
  • the base 31 is extended, on the one hand, by a lug 34, the end 35 of which is chamfered and has a generally trapezoidal section, on the other hand, by a tongue 36, the end 3 of which is bent at a right angle and is located on the opposite face of the base 31 relative to the tab 34.
  • the high-voltage bracket 1, the high-voltage guide 25, the insert 30 form part of an assembly constituting the high-voltage connection of the single-cylinder ignition coil according to the invention.
  • FIGS 10 and 11 illustrate such a coil consisting in particular of a housing 50 molded in plastic and a connector 51 allowing the low-voltage supply of the coil.
  • the magnetic circuit is closed and has a primary winding 52, wound around a reel 53.
  • a magnetic core 54 of rectangular section and generally composed of cut and laminated magnetic sheets is housed inside the reel 53.
  • a secondary winding 55 around which a secondary winding 56 is wound.
  • the secondary spool 55 is held in lift on and around the primary spool 53.
  • the high-voltage insert 30, described above, is introduced through the end 35 of its tab 34 into a slot provided for this purpose in the secondary coil 55.
  • the end of the secondary winding 56 is welded.
  • the assembly comprising in particular the primary 53 and secondary 55 coils thus formed is introduced into the housing 57 of the housing 50.
  • a magnetic flux return circuit 59 the general U shape of which can be seen, consisting of cut and laminated magnetic sheets, is incorporated by molding in the housing 50.
  • the magnetic flux return circuit 59 constitutes the metal frame of the housing 50 and the base fixing the entire coil to the cylinder head of the engine.
  • the high-voltage connection assembly is produced.
  • this high-voltage connection assembly consists of a spring 61 which is introduced into the high-voltage guide 25 until it comes into abutment against its tongue 27 (FIG. 4).
  • This spring 61 coming into direct contact with the spark plug associated with the coil therefore ensures the transmission of the high-voltage, and constitutes the high-voltage output member.
  • the high-voltage guide 25 fitted with the spring 61 is inserted into the housing 3 of the high-voltage bracket 1 and is fixed therein by snap-fastening the tab 27 of the guide 25 into the slot 20, 21 (FIGS. 2 and 3) ) of the outlet 14 of the bracket 1.
  • This high-voltage connection assembly thus produced is positioned in the housing on the secondary winding 55 already installed.
  • the high-voltage assembly is thus positioned in the housing 57 of the housing 50 synthetic resin is poured which fills it up to a level N close to that of the face 62 of the housing 50.
  • this level N is always greater than the level N ′ corresponding to the end of the spring 61 in the high-voltage guide 25.
  • the hardening of the resin immobilizes all the constituents inside the housing 50 and in particular the spring 61.
  • a high-voltage connection has thus been produced in particular with the spring 61, presenting numerous advantages: no more wearing part, resistance to vibrations, easy fixing.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Ignition Installations For Internal Combustion Engines (AREA)
EP90402485A 1989-09-15 1990-09-11 Hochspannungsanschlussvorrichtung für eine Zündspule, insbesondere für Brennkraftmaschinen von Kraftfahrzeugen Expired - Lifetime EP0418136B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8912087A FR2652196B1 (fr) 1989-09-15 1989-09-15 Connectique haute-tension d'une bobine d'allumage, en particulier pour moteur a combustion interne de vehicule automobile.
FR8912087 1989-09-15

Publications (2)

Publication Number Publication Date
EP0418136A1 true EP0418136A1 (de) 1991-03-20
EP0418136B1 EP0418136B1 (de) 1994-01-12

Family

ID=9385502

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90402485A Expired - Lifetime EP0418136B1 (de) 1989-09-15 1990-09-11 Hochspannungsanschlussvorrichtung für eine Zündspule, insbesondere für Brennkraftmaschinen von Kraftfahrzeugen

Country Status (6)

Country Link
US (1) US5041807A (de)
EP (1) EP0418136B1 (de)
JP (1) JPH03117683A (de)
DE (1) DE69005953T2 (de)
ES (1) ES2048463T3 (de)
FR (1) FR2652196B1 (de)

Families Citing this family (7)

* 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
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
US5406242A (en) * 1994-01-10 1995-04-11 Ford Motor Company Ignition coil
JPH0845754A (ja) * 1994-07-26 1996-02-16 Aisan Ind Co Ltd 内燃機関用点火コイル
US6264183B1 (en) * 1999-08-19 2001-07-24 Precision Products Group Methods of manufacturing coils and apparatus for same
JP2008021794A (ja) * 2006-07-12 2008-01-31 Hanshin Electric Co Ltd 内燃機関用点火コイル
JP2008187026A (ja) * 2007-01-30 2008-08-14 Diamond Electric Mfg Co Ltd 内燃機関用点火コイル

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2447376A (en) * 1943-05-28 1948-08-17 Bendix Aviat Corp Ignition apparatus
GB803640A (en) * 1954-04-20 1958-10-29 Eric Lionel Hutchings Electric sleeve connectors
GB975268A (en) * 1960-06-03 1964-11-11 Western Electric Co Electrical connectors
FR2526992A1 (fr) * 1982-05-12 1983-11-18 Bosch Gmbh Robert Bobine d'allumage pour installation d'allumage de moteur a combustion interne
DE8518139U1 (de) * 1985-06-22 1986-10-16 PVL Probosch-Vogt-Loos GmbH & Co Electronic KG, 8501 Cadolzburg Mit einem Kerzenstecker integrierte Zündspule
GB2199193A (en) * 1986-11-21 1988-06-29 Nippon Denso Co Ignition coil

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2447376A (en) * 1943-05-28 1948-08-17 Bendix Aviat Corp Ignition apparatus
GB803640A (en) * 1954-04-20 1958-10-29 Eric Lionel Hutchings Electric sleeve connectors
GB975268A (en) * 1960-06-03 1964-11-11 Western Electric Co Electrical connectors
FR2526992A1 (fr) * 1982-05-12 1983-11-18 Bosch Gmbh Robert Bobine d'allumage pour installation d'allumage de moteur a combustion interne
DE8518139U1 (de) * 1985-06-22 1986-10-16 PVL Probosch-Vogt-Loos GmbH & Co Electronic KG, 8501 Cadolzburg Mit einem Kerzenstecker integrierte Zündspule
GB2199193A (en) * 1986-11-21 1988-06-29 Nippon Denso Co Ignition coil

Also Published As

Publication number Publication date
ES2048463T3 (es) 1994-03-16
DE69005953D1 (de) 1994-02-24
FR2652196B1 (fr) 1992-01-31
JPH03117683A (ja) 1991-05-20
FR2652196A1 (fr) 1991-03-22
DE69005953T2 (de) 1994-08-11
EP0418136B1 (de) 1994-01-12
US5041807A (en) 1991-08-20

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