EP0248717A1 - Elektromagnetische Spule und Zündvorrichtung für Verbrennungsmotor mit einer solchen Spule - Google Patents

Elektromagnetische Spule und Zündvorrichtung für Verbrennungsmotor mit einer solchen Spule Download PDF

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Publication number
EP0248717A1
EP0248717A1 EP87401203A EP87401203A EP0248717A1 EP 0248717 A1 EP0248717 A1 EP 0248717A1 EP 87401203 A EP87401203 A EP 87401203A EP 87401203 A EP87401203 A EP 87401203A EP 0248717 A1 EP0248717 A1 EP 0248717A1
Authority
EP
European Patent Office
Prior art keywords
coil
spark plug
central electrode
bobbin
secondary winding
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
EP87401203A
Other languages
English (en)
French (fr)
Other versions
EP0248717B1 (de
Inventor
Alexandre Kermorvant
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.)
Alpine Racing SAS
Original Assignee
Renault Sport SAS
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 Renault Sport SAS filed Critical Renault Sport SAS
Publication of EP0248717A1 publication Critical patent/EP0248717A1/de
Application granted granted Critical
Publication of EP0248717B1 publication Critical patent/EP0248717B1/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
    • F02P13/00—Sparking plugs structurally combined with other parts of internal-combustion engines
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01T—SPARK GAPS; OVERVOLTAGE ARRESTERS USING SPARK GAPS; SPARKING PLUGS; CORONA DEVICES; GENERATING IONS TO BE INTRODUCED INTO NON-ENCLOSED GASES
    • H01T13/00—Sparking plugs
    • H01T13/02—Details
    • H01T13/04—Means providing electrical connection to sparking plugs
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01T—SPARK GAPS; OVERVOLTAGE ARRESTERS USING SPARK GAPS; SPARKING PLUGS; CORONA DEVICES; GENERATING IONS TO BE INTRODUCED INTO NON-ENCLOSED GASES
    • H01T13/00—Sparking plugs
    • H01T13/40—Sparking plugs structurally combined with other devices
    • H01T13/44—Sparking plugs structurally combined with other devices with transformers, e.g. for high-frequency ignition

Definitions

  • the invention relates to a new embodiment of an electromagnetic coil and its particular use in an ignition device for an internal combustion engine.
  • An ignition coil is an inductive accumulator that stores ignition energy for transmission to the ignition circuit in an internal combustion engine. Generally, it consists of a primary winding and a secondary winding wound on one another and comprising a common iron core which reinforces the magnetic flux. The high voltage of the ignition coil is conducted by the ignition cable and is distributed to each of the spark plugs, via the igniter.
  • the present invention relates to this type of ignition device, for which the coil does not have a soft iron core, thus achieving a saving in weight and is produced in such a way that it withstands high temperatures and resists vibration. thanks to the materials that compose it.
  • the invention therefore relates firstly to an electromagnetic coil characterized in that it comprises: - a hollow winding mandrel made of dielectric material having good resistance to high temperatures and to chemical agents, around which the primary and secondary windings are wound, the output wire of the secondary circuit leaving the coil through a cavity dug in the mandrel along its longitudinal axis; means of electrical insulation between the different layers of turns, produced from sheets of flexible dielectric synthetic material with a high coefficient of electrical rigidity and good resistance to heat and from a low viscosity impregnation resin and with good adhesion to said sheets of flexible material.
  • the invention relates to an ignition device for an internal combustion engine comprising a coil associated with each spark plug, characterized in that it comprises: - a cylindrical housing of dielectric material having good resistance to heat and to chemical agents, in which is housed on the one hand a coil of the type mentioned above and on the other hand the part of the spark plug constituted by the surrounding electrical insulator the central electrode, - And coil-spark plug interface means ensuring electrical continuity between the secondary winding of the coil and the central electrode of the spark plug.
  • the figure shows a view along a longitudinal couple of an ignition device according to the invention, comprising a spark plug 1 and a coil 2 associated in the same housing 3, placed on an engine of a motor vehicle, in the conduit of spark plug 4, the spark plug 1 being traditionally screwed into the cylinder head 5 of the engine.
  • the electromagnetic coil 2 comprises a hollow winding mandrel 6, made of dielectric material, resistant well to high temperatures, close to 200 ° C. and to chemical agents.
  • this coil can be associated with a spark plug for a motor vehicle it must be able to remain unalterable whatever the climatic environment of the vehicle, that is to say resist thermal shocks, humidity, salt or oil sprayed into the engine.
  • this mandrel 6 having a cavity 7 hollowed out along its longitudinal axis ⁇ is wound first the secondary winding then the primary winding, each layer of turns being separated from the next by a layer of flexible dielectric synthetic material, Kapton for example, with a high coefficient of electrical rigidity and good heat resistance.
  • a layer of flexible dielectric synthetic material Kapton for example
  • the electrical insulation between the layers of turns is provided by an impregnation resin with low viscosity and good adhesion to the sheets of said flexible material.
  • This resin is advantageously a silicone resin, which has the following qualities: unalterable over time and whatever the ambient temperature, excellent dielectric and hydrophobic.
  • the output wire 8 of the secondary winding which is intended to conduct the high voltage created by the coil 2 to the spark plug 1 which is associated with it.
  • This coil 2 of small dimensions (about 5 cm high by 3 cm in diameter) is associated with a candle 1, both housed in a housing 3 made of dielectric material, resistant both to high temperatures and to chemical attack - it can be the same material as the spool mandrel -. To obtain maximum energy from the spark plug, the coil must have a low secondary impedance.
  • the coil according to the invention allows to realize thanks to its small dimensions. Indeed the section of the wire primary winding is chosen relatively large while its length is relatively short, so as to reduce the number of turns of the primary winding.
  • the housing 3 is cylindrical, with two sections for example; the part in which the coil 2 is completely housed has a diameter slightly greater than the part in which the spark plug 1 is partially housed. Only the part of the spark plug 1 comprising the electrical insulator - generally made of ceramic - surrounding the central electrode is housed in the housing 3. To provide electrical continuity between the coil 2 and the spark plug 1, there are interface means 10 intended moreover to thermally protect the coil of the spark plug, the temperature of which during operation can reach 180 ° C.
  • interface means 10 are constituted, for example, by an olive cover 11 made of conductive material, metal for example, screwed on the threaded cap, or olive 9, which covers the upper end of the connection rod which is itself connected to the central electrode of the spark plug 1 and comprising a conductive spring 12 intended to come into contact with the wire secondary output from coil 2.
  • a conductive rubber pad 13 can be placed inside the olive cover at the top of the spark plug connection rod 1.
  • the top of the dielectric casing 3 for protecting the coil-spark plug assembly is closed by a dielectric plug 14 allowing the supply wire 15 to pass from the primary winding of the coil 2, connected to the ignition control circuit.
  • the coil-spark plug assembly thus being formed in the housing, the spark plug 1 is screwed conventionally by its base 16 into the cylinder head 5 of the engine.
  • the invention makes it possible to obtain a saving in weight and space compared to the prior devices, since the ignition device is compact, without iron core for the coil, and good resistance to temperature, vibration and good resistance to chemical agents thanks to the insulating materials used.
  • the energy delivered by the ignition coil is directly used by the spark plug, without losses in wiring.
  • the frequency of the coil produced according to the invention is greater than that of a coil with an inductive core (soft iron), the time for the voltage to rise across the terminals of l the secondary winding is shorter so that the spark between the two electrodes of the spark plug bursts in a rotating fashion around the central electrode, without carbon deposition along a particular path; the candle self-cleans.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Ignition Installations For Internal Combustion Engines (AREA)
  • Spark Plugs (AREA)
EP19870401203 1986-06-03 1987-05-27 Elektromagnetische Spule und Zündvorrichtung für Verbrennungsmotor mit einer solchen Spule Expired - Lifetime EP0248717B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8607938A FR2599431B1 (fr) 1986-06-03 1986-06-03 Bobine electromagnetique et dispositif d'allumage pour moteur a combustion interne comportant une telle bobine.
FR8607938 1986-06-03

Publications (2)

Publication Number Publication Date
EP0248717A1 true EP0248717A1 (de) 1987-12-09
EP0248717B1 EP0248717B1 (de) 1991-01-23

Family

ID=9335920

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19870401203 Expired - Lifetime EP0248717B1 (de) 1986-06-03 1987-05-27 Elektromagnetische Spule und Zündvorrichtung für Verbrennungsmotor mit einer solchen Spule

Country Status (3)

Country Link
EP (1) EP0248717B1 (de)
DE (1) DE3767570D1 (de)
FR (1) FR2599431B1 (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0344387A1 (de) * 1988-05-31 1989-12-06 Société à Responsabilité Limitée L'ELECTRICFIL INDUSTRIE Zündtransformator und Zündkerzen-Einheit bei einem Zylinder in einer gesteuerten Brennkraftmaschine
FR2661216A1 (fr) * 1990-04-23 1991-10-25 Electricfil Ind Sarl Bobine integree d'allumage individuel d'une bougie de moteur thermique a combustion interne et a allumage commande.
WO1992010672A1 (en) * 1990-12-10 1992-06-25 Caterpillar Inc. Engine ignition system including a transformer assembly and positioning means therefor
WO1997036354A1 (de) * 1996-03-22 1997-10-02 Florian Virchow Zündkerzenstecker für einen verbrennungsmotor

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3920080C2 (de) * 1989-06-20 1994-08-04 Audi Ag Zündvorrichtung für eine Brennkraftmaschine
DE4117182C1 (en) * 1991-05-25 1992-06-25 Mercedes-Benz Aktiengesellschaft, 7000 Stuttgart, De Forming ignition coil mounting for IC engine - fixing laminated core on cylinder head cover so that lower part penetrates latter and protecting from heat radiated by engine by plastics material shell
DE29616780U1 (de) * 1996-09-26 1998-01-29 Robert Bosch Gmbh, 70469 Stuttgart Stabspule für Zündanlagen

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2467725A (en) * 1947-08-28 1949-04-19 Westinghouse Electric Corp Ignition system
GB867060A (en) * 1959-05-22 1961-05-03 Wipac Dev Ltd Improvements in and relating to transformers
WO1985000930A1 (en) * 1983-08-05 1985-02-28 Saab-Scania Aktiebolag Ignition unit in the ignition system of an internal combustion engine
US4514712A (en) * 1975-02-13 1985-04-30 Mcdougal John A Ignition coil

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2467725A (en) * 1947-08-28 1949-04-19 Westinghouse Electric Corp Ignition system
GB867060A (en) * 1959-05-22 1961-05-03 Wipac Dev Ltd Improvements in and relating to transformers
US4514712A (en) * 1975-02-13 1985-04-30 Mcdougal John A Ignition coil
WO1985000930A1 (en) * 1983-08-05 1985-02-28 Saab-Scania Aktiebolag Ignition unit in the ignition system of an internal combustion engine

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0344387A1 (de) * 1988-05-31 1989-12-06 Société à Responsabilité Limitée L'ELECTRICFIL INDUSTRIE Zündtransformator und Zündkerzen-Einheit bei einem Zylinder in einer gesteuerten Brennkraftmaschine
FR2661216A1 (fr) * 1990-04-23 1991-10-25 Electricfil Ind Sarl Bobine integree d'allumage individuel d'une bougie de moteur thermique a combustion interne et a allumage commande.
EP0454598A1 (de) * 1990-04-23 1991-10-30 Société à Responsabilité Limitée L'ELECTRICFIL INDUSTRIE Integrierte Zündeinheit, die Kerze und Zündspule für gesteuerte einzelne Zündung in einer Brennkraftmaschine enthält.
WO1992010672A1 (en) * 1990-12-10 1992-06-25 Caterpillar Inc. Engine ignition system including a transformer assembly and positioning means therefor
WO1997036354A1 (de) * 1996-03-22 1997-10-02 Florian Virchow Zündkerzenstecker für einen verbrennungsmotor
US6068495A (en) * 1996-03-22 2000-05-30 Virchow; Florian Sparking plug connector for an internal combustion engine

Also Published As

Publication number Publication date
DE3767570D1 (de) 1991-02-28
FR2599431B1 (fr) 1988-09-09
EP0248717B1 (de) 1991-01-23
FR2599431A1 (fr) 1987-12-04

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