EP0340083A1 - Zündspule für Brennkraftmaschinen von Fahrzeugen und Verfahren zur Herstellung - Google Patents

Zündspule für Brennkraftmaschinen von Fahrzeugen und Verfahren zur Herstellung Download PDF

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Publication number
EP0340083A1
EP0340083A1 EP89401123A EP89401123A EP0340083A1 EP 0340083 A1 EP0340083 A1 EP 0340083A1 EP 89401123 A EP89401123 A EP 89401123A EP 89401123 A EP89401123 A EP 89401123A EP 0340083 A1 EP0340083 A1 EP 0340083A1
Authority
EP
European Patent Office
Prior art keywords
housing
ignition coil
magnetic circuit
internal
windings
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
EP89401123A
Other languages
English (en)
French (fr)
Other versions
EP0340083B1 (de
Inventor
Pierre Heritier-Best
Jean-Marie Autuche
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 EP0340083A1 publication Critical patent/EP0340083A1/de
Application granted granted Critical
Publication of EP0340083B1 publication Critical patent/EP0340083B1/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
    • 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
    • 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
    • F02P7/00—Arrangements of distributors, circuit-makers or -breakers, e.g. of distributor and circuit-breaker combinations or pick-up devices
    • F02P7/02—Arrangements of distributors, circuit-makers or -breakers, e.g. of distributor and circuit-breaker combinations or pick-up devices of distributors
    • F02P7/021—Mechanical distributors
    • F02P7/026—Distributors combined with other ignition devices, e.g. coils, fuel-injectors
    • 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
    • H01F27/255—Magnetic cores made from particles
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
    • H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
    • H01F41/0206—Manufacturing of magnetic cores by mechanical means

Definitions

  • the present invention relates to ignition coils for the ignition of internal combustion engines of motor vehicles, and its manufacturing process.
  • Such known ignition coils can be, for example, constituted by a closed magnetic circuit comprising a central core in the shape of an "I”, and two return branches of the magnetic flux in the shape of a "C" arranged at 180 ° from on either side of the central core.
  • the central core and the return branches of the flow are produced by a stack of cut sheets mechanically linked together.
  • a primary winding equipped with two terminals connected respectively to each end of said winding, and a secondary winding equipped with a high-voltage output pin, are arranged coaxially around the central core and between the flux return branches.
  • the assembly is inserted into a housing before pouring a polymerizing synthetic resin therein which will isolate and secure the various elements of the coil leaving only the connection terminals of the primary circuit and the tip of the high output pin visible. voltage.
  • This process is not applicable to an ignition coil for a motor vehicle.
  • the magnetic circuit cannot be molded but is an integral part of the coil.
  • the air gap of the magnetic circuit must be very precise and this precision cannot be reached by orienting the grains of the magnetic circuit before any coating thereof.
  • the present invention proposes to overcome these drawbacks by proposing an ignition coil provided with a magnetic circuit of simple construction, inexpensive, and having better efficiency.
  • an ignition coil in particular for the ignition of internal combustion engines of motor vehicles, of the type comprising a magnetic circuit, two windings, one primary and the other secondary, arranged coaxially around a core of the magnetic circuit, at least one high-voltage output terminal and two connection terminals connected respectively to each of the ends of the primary winding, characterized in that an internal housing is housed in a second housing delimiting between them a free space of substantially constant cross section, space in which the constituent grains are arranged of the magnetic circuit and in that said magnetic circuit is composed of grains of oriented magnetizable material.
  • the coil is produced by the following consecutive steps: - Introduction of the primary and secondary windings, respectively provided with their connection plugs and the high-voltage output, in an internal box. - Introduction of the internal box in a second box. - Installation of grains of magnetizable material in the free space delimited between the boxes. - Supply of one of the windings for grain orientation. - Impregnation of the whole with a synthetic polymerizing resin.
  • An ignition coil 1, shown in Figures 1 to 3 has two coaxially arranged windings, one primary 2 and the other secondary 3.
  • the secondary winding 3 has a pin 31, welded to one end of the winding secondary 3 by a bent part 30, and ends at its end by a high-voltage output 32.
  • the pin 31 is fixed on a spool (not shown) carrying the windings 2 and 3.
  • Each of the ends 22 of the primary winding 2 is connected to a plug 21 (only one being shown) which are also fixed to the spool.
  • the internal housing 4 comprises a first housing 41 of annular shape comprising a bottom 42 and, in its axial part, a second housing 43 of tubular shape with a height greater than the height of the first annular housing 41.
  • the first housing annular 41 and the second tubular housing 43 are in communication by an opening 44 which extends over the entire height of said first housing 41, and are connected, on the one hand, by walls 44 a delimiting the opening 44 and, d on the other hand, by bridges 45 provided for this purpose on the bottom 42 of the internal housing 4.
  • the primary 2 and secondary 3 windings are inserted into the first housing 41.
  • the bent part 30 of the pin 31 passes through the opening 44.
  • the windings 2 and 3 are held inside the first housing 41 so that a substantially constant space remains between said windings 2 and 3 and the internal walls of said first housing 41 by means not shown, such as described for example in French patent application 2,593,962.
  • a cover 5 is then placed on the internal box 4.
  • This annular cover 5 makes it possible to cover the first housing 41, and by its appendage 51, also makes it possible to cover the opening 44 and the part 44 b of the opening 44 extending over the upper part of the second housing 43 higher than the first housing 41.
  • the cover 5 also has a box 52 inside which appear the plugs 21 of the primary winding 2 in order to produce a connector.
  • the internal housing 4 thus equipped is inserted into a second housing 6 produced by molding plastic material in the form of a pot and of a diameter greater than that of said internal housing 4.
  • a plurality of shims 46 are formed on the lower part of the internal housing 4 and consist of radial lugs 46 a and lugs 46 b directed vertically.
  • the length of the vertical legs 46 b is equal to the length of the part 43 a of the second tubular housing 43 which opens out from the bottom 42 of the housing 4.
  • These shims 46 serve to position the internal housing 4 in the second housing 6 so as to delimit a space of substantially constant section between the walls of said internal boxes 4 and the second box 6.
  • particles of magnetizable material such as pure iron are poured into the free space by the boxes 4 and 6 by vibrating the assembly so that said particles fill said space.
  • the space 47 situated between the two annular 46 and tubular housing 34 is in communication with the outside of the internal box 4, that is to say with the inside of the second box 6 thanks to the windows 48 delimited by the bridges 45 connecting the two housings 41 and 43.
  • the particles of magnetizable material thus constitute a magnetic circuit, the central core 7 being housed in space 47, while the flux return circuit 8 is located in space 49 between the two boxes 4 and 6.
  • an air gap is made in part of the circuit, for example in the central core in order to avoid temporary or permanent saturation of said magnetic circuit.
  • the air gap consists of the sum of the spaces between each of the grains constituting the magnetic circuit.
  • a synthetic polymerizing resin 60 is poured inside the second box 6 impregnating the particles of material, and penetrating into the free space, and inside the internal box 4 passing through the upper opening of the tubular housing 43 and through the opening 44 to impregnate the windings 2 and 3.
  • a chimney 61 is made of material by overmolding around the spindle 31 leaving only the high-voltage output 32 to appear.
  • a permanent magnet 9 of annular shape is arranged in the magnetic circuit 7,8 so as to cut the path followed by the magnetic flux.
  • the magnet permanent 9 can be placed in the central core and rest on bridges 45.
  • a housing 100 in the case of a static distribution ignition system, for a four-cylinder engine, has four pots 106 arranged in line and each capable of receiving a coil 101 according to the invention. Cooling fins 102 can be obtained in one piece with the housing 100 and between each pot 106 in order to further improve the heat dissipation.
  • a channel 103 is formed in the housing 100 and allows the passage of the connection wires of the primary circuit up to a connector 104. Such an assembly is particularly suitable for being placed near the cylinders of the engine which the coils light up.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Ignition Installations For Internal Combustion Engines (AREA)
EP19890401123 1988-04-28 1989-04-21 Zündspule für Brennkraftmaschinen von Fahrzeugen und Verfahren zur Herstellung Expired - Lifetime EP0340083B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8805673 1988-04-28
FR8805673A FR2630782B1 (fr) 1988-04-28 1988-04-28 Bobine d'allumage pour l'allumage des moteurs a combustion interne de vehicules automobiles, et son procede de fabrication

Publications (2)

Publication Number Publication Date
EP0340083A1 true EP0340083A1 (de) 1989-11-02
EP0340083B1 EP0340083B1 (de) 1994-07-13

Family

ID=9365781

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19890401123 Expired - Lifetime EP0340083B1 (de) 1988-04-28 1989-04-21 Zündspule für Brennkraftmaschinen von Fahrzeugen und Verfahren zur Herstellung

Country Status (4)

Country Link
EP (1) EP0340083B1 (de)
JP (1) JP3011943B2 (de)
DE (1) DE68916690T2 (de)
FR (1) FR2630782B1 (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0512357A2 (de) * 1991-05-03 1992-11-11 Cooper Industries Italia S.p.A. Zündeinheit für eine Brennkraftmaschine
EP0579487A2 (de) * 1992-07-16 1994-01-19 Sumitomo Wiring Systems, Ltd. Kupplungskonstruktion
EP0637856A1 (de) * 1993-08-05 1995-02-08 Sumitomo Wiring Systems, Ltd. Steckerverbindungskonstruktion für ein Zündsystem
WO2008017631A2 (de) * 2006-08-09 2008-02-14 Robert Bosch Gmbh Verfahren zum herstellen einer spule, insbesondere einer zündspule für ein kraftfahrzeug

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3951205B2 (ja) * 1998-05-19 2007-08-01 株式会社デンソー パワーステアリング方法およびパワーステアリング装置
JP5157956B2 (ja) * 2009-02-25 2013-03-06 株式会社デンソー リアクトル

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2701865A (en) * 1952-05-31 1955-02-08 Essex Wire Corp Ignition coil
FR1416509A (fr) * 1964-09-23 1965-11-05 Parisienne De Const Electro Me Circuit magnétique moulé
FR2013280A1 (de) * 1968-07-19 1970-03-27 Pal Magneton
FR2057059A7 (de) * 1969-08-08 1971-05-07 Eltra Corp
FR2593962A1 (fr) * 1986-01-24 1987-08-07 Ducellier & Cie Bobine d'allumage a circuit ferme

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2701865A (en) * 1952-05-31 1955-02-08 Essex Wire Corp Ignition coil
FR1416509A (fr) * 1964-09-23 1965-11-05 Parisienne De Const Electro Me Circuit magnétique moulé
FR2013280A1 (de) * 1968-07-19 1970-03-27 Pal Magneton
FR2057059A7 (de) * 1969-08-08 1971-05-07 Eltra Corp
FR2593962A1 (fr) * 1986-01-24 1987-08-07 Ducellier & Cie Bobine d'allumage a circuit ferme

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0512357A2 (de) * 1991-05-03 1992-11-11 Cooper Industries Italia S.p.A. Zündeinheit für eine Brennkraftmaschine
EP0512357A3 (en) * 1991-05-03 1992-12-09 Industrie Magneti Marelli S.P.A. A plug-top coil-ignition unit for an internal combustion engine
EP0579487A2 (de) * 1992-07-16 1994-01-19 Sumitomo Wiring Systems, Ltd. Kupplungskonstruktion
EP0579487A3 (de) * 1992-07-16 1995-01-18 Sumitomo Wiring Systems Kupplungskonstruktion.
EP0637856A1 (de) * 1993-08-05 1995-02-08 Sumitomo Wiring Systems, Ltd. Steckerverbindungskonstruktion für ein Zündsystem
US5547387A (en) * 1993-08-05 1996-08-20 Sumitomo Wiring Systems, Ltd. Joint construction for ignition system
WO2008017631A2 (de) * 2006-08-09 2008-02-14 Robert Bosch Gmbh Verfahren zum herstellen einer spule, insbesondere einer zündspule für ein kraftfahrzeug
WO2008017631A3 (de) * 2006-08-09 2008-04-10 Bosch Gmbh Robert Verfahren zum herstellen einer spule, insbesondere einer zündspule für ein kraftfahrzeug
US8230584B2 (en) 2006-08-09 2012-07-31 Robert Bosch Gmbh Method for producing a coil, in particular an ignition coil for a motor vehicle

Also Published As

Publication number Publication date
DE68916690T2 (de) 1995-04-06
EP0340083B1 (de) 1994-07-13
DE68916690D1 (de) 1994-08-18
FR2630782A1 (fr) 1989-11-03
JP3011943B2 (ja) 2000-02-21
JPH01316915A (ja) 1989-12-21
FR2630782B1 (fr) 1993-05-14

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