EP0682348A1 - Zündspule - Google Patents

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Publication number
EP0682348A1
EP0682348A1 EP95401034A EP95401034A EP0682348A1 EP 0682348 A1 EP0682348 A1 EP 0682348A1 EP 95401034 A EP95401034 A EP 95401034A EP 95401034 A EP95401034 A EP 95401034A EP 0682348 A1 EP0682348 A1 EP 0682348A1
Authority
EP
European Patent Office
Prior art keywords
winding
primary winding
coil
wound
primary
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
EP95401034A
Other languages
English (en)
French (fr)
Other versions
EP0682348B1 (de
Inventor
Pierre Heritier-Best
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
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 filed Critical Sagem Allumage SA
Publication of EP0682348A1 publication Critical patent/EP0682348A1/de
Application granted granted Critical
Publication of EP0682348B1 publication Critical patent/EP0682348B1/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, and more particularly such a coil comprising a magnetic core and primary and secondary windings wound around the magnetic core, at least the secondary winding being wound on a tubular secondary coil and the primary winding. being disposed inside the secondary winding.
  • Such ignition coils are well known in the field of internal combustion engines. When a low voltage is applied and then canceled across the primary winding, this results in a high voltage pulse across the secondary winding. This pulse is applied to a spark plug of the engine, which causes the gases contained in the corresponding cylinder to explode.
  • the primary winding is itself wound on a primary winding, arranged inside and coaxially with the secondary winding.
  • EP-A-0 071 172 has proposed a secondary coil closed on the side of the high-voltage output end of the secondary winding.
  • the secondary winding is presented in this document in the form of a tube provided with a bottom on the side of the end of the secondary winding forming the high voltage output.
  • This coil can be made of a plastic material having a high dielectric strength, making it impossible to form an arc between the high voltage output and the primary winding.
  • Also known coils said to two outputs.
  • the two ends of the secondary winding are each connected to a spark plug.
  • the high voltage pulse is formed when the cylinder corresponding to one of the candles contains the mixture to be exploded, and the cylinder corresponding to the other candle contains burnt gases. Due to the differences in electrical characteristics between the fuel mixture and the burnt gases, a single high-energy spark is formed on the side of the fuel mixture, the other low-energy spark serving only to return to ground.
  • the invention aims to overcome this drawback.
  • the invention relates to an ignition coil of the type described above, characterized in that it comprises two high voltage outputs, the secondary winding being formed of two half-windings in series, each wound on a secondary coil closed at one of its ends where the corresponding high voltage output is located, and the primary winding being housed inside the two secondary coils arranged head to tail, with its two outputs passing between the open ends of the two coils secondary.
  • the primary winding is wound on an even number of layers, from the center of the winding to one of the ends, then from this end to the other end, then from this other end to the center, and possibly so on.
  • the primary coil 1 in the form of a plastic tube, in which is disposed the magnetic core (the member referenced 1 could also be the magnetic core itself in the case of a primary winding directly wound on this core).
  • the primary winding 2 is wound on the primary winding 1, here on two layers. One of the ends 3 of the primary winding 2 is connected to ground, while the other end 4 can be connected via an electronic switch at low voltage.
  • the assembly constituted by the magnetic circuit, the coil 1 and the primary winding 2 is disposed inside a secondary coil 5, the two ends 3 and 4 of the primary winding protruding from this coil.
  • This secondary coil is in the form of a tube having a bottom 6 at its end opposite to the outputs 3 and 4 of the primary winding.
  • the coil is made of a plastic material having a high dielectric strength.
  • the bobbin 5 can for example be of the type comprising radial fins delimiting different annular winding compartments arranged axially side by side.
  • the secondary winding 7 is wound on the secondary winding 5, from one of its ends to the other end.
  • the end of the winding 7, located on the open side of the bobbin 5, is connected by a connection 8 to the ground, while its opposite end is connected by a high voltage connection 9 to the high voltage output, itself connected to the spark plug.
  • the primary winding 10 of this coil has one of its ends connected to the low voltage and its other end capable of being grounded by means of an electronic switch 11.
  • the secondary winding 12 has each of its ends connected to a candle 13, 13 '. The operation of such a coil has been recalled above.
  • Figure 3 shows such a coil according to the invention.
  • the primary winding 20 is wound on a primary winding 21, being in the form of a tube inside which the magnetic core is disposed (or directly on this magnetic core as above).
  • the winding of the primary winding is started at 22 in the middle of the primary winding then is continued on a first layer until 23 at one of the ends of this primary winding.
  • the winding then continues on a second layer until 24 in the middle of the bobbin, then again on a first layer on the other half of the bobbin from 25 to 26 at the end of the bobbin opposite the end 23.
  • the primary winding ends with a second layer from the end 26 to 27 at the center of the bobbin.
  • the two ends 28 and 29 of the primary winding are therefore in the center of the primary winding.
  • a first secondary half-winding is then wound on the secondary winding 30, from its closed end to its open end, that is to say from the end of the reel to its center.
  • the wire of the secondary winding is then passed over the secondary winding 31, on its open side, via a link 34.
  • the secondary winding is then terminated around the winding 31 to the closed end of this one, that is to say at the end of the coil opposite to that where the secondary winding began.
  • the two high voltage outputs 35 and 36 of the coil are therefore at the two ends of the latter where they are isolated from the primary winding by the bottoms 32 and 33 of the secondary coils 30 and 31 respectively.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Ignition Installations For Internal Combustion Engines (AREA)
EP95401034A 1994-05-10 1995-05-04 Zündspule Expired - Lifetime EP0682348B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9405734 1994-05-10
FR9405734A FR2719940B1 (fr) 1994-05-10 1994-05-10 Bobine d'allumage.

Publications (2)

Publication Number Publication Date
EP0682348A1 true EP0682348A1 (de) 1995-11-15
EP0682348B1 EP0682348B1 (de) 1997-08-13

Family

ID=9463069

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95401034A Expired - Lifetime EP0682348B1 (de) 1994-05-10 1995-05-04 Zündspule

Country Status (6)

Country Link
US (1) US5506561A (de)
EP (1) EP0682348B1 (de)
JP (1) JP3472381B2 (de)
AT (1) ATE156930T1 (de)
DE (1) DE69500539T2 (de)
FR (1) FR2719940B1 (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10242879A1 (de) * 2002-09-16 2004-03-25 Tyco Electronics Amp Gmbh Zündspule mit verbesserter Energieübertragung

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2478087A (en) * 1945-11-01 1949-08-02 Gen Motors Corp Spark plug
FR1113514A (fr) * 1953-11-20 1956-03-30 Thomson Houston Comp Francaise Appareil à induction
FR1290274A (fr) * 1961-03-01 1962-04-13 D B A Division Ducellier Perfectionnements aux bobines d'allumage
EP0071172A2 (de) * 1981-07-24 1983-02-09 Honeywell Inc. Hochspannungs-Zündtransformator

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1960033A (en) * 1931-12-05 1934-05-22 Franklin S Smith Transformer construction and method of making the same
US3843946A (en) * 1973-10-05 1974-10-22 Original Equipment Motors Inc Dual bobbin assembly for coils

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2478087A (en) * 1945-11-01 1949-08-02 Gen Motors Corp Spark plug
FR1113514A (fr) * 1953-11-20 1956-03-30 Thomson Houston Comp Francaise Appareil à induction
FR1290274A (fr) * 1961-03-01 1962-04-13 D B A Division Ducellier Perfectionnements aux bobines d'allumage
EP0071172A2 (de) * 1981-07-24 1983-02-09 Honeywell Inc. Hochspannungs-Zündtransformator

Also Published As

Publication number Publication date
EP0682348B1 (de) 1997-08-13
DE69500539D1 (de) 1997-09-18
JPH0845756A (ja) 1996-02-16
DE69500539T2 (de) 1998-03-19
JP3472381B2 (ja) 2003-12-02
ATE156930T1 (de) 1997-08-15
FR2719940A1 (fr) 1995-11-17
FR2719940B1 (fr) 1996-07-05
US5506561A (en) 1996-04-09

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