EP0974985A1 - Bobine d'allumage - Google Patents

Bobine d'allumage Download PDF

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Publication number
EP0974985A1
EP0974985A1 EP99113017A EP99113017A EP0974985A1 EP 0974985 A1 EP0974985 A1 EP 0974985A1 EP 99113017 A EP99113017 A EP 99113017A EP 99113017 A EP99113017 A EP 99113017A EP 0974985 A1 EP0974985 A1 EP 0974985A1
Authority
EP
European Patent Office
Prior art keywords
coil
ignition
primary
ignition coil
core
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.)
Withdrawn
Application number
EP99113017A
Other languages
German (de)
English (en)
Inventor
Reinhard Artmann
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.)
Bayerische Motoren Werke AG
Original Assignee
Bayerische Motoren Werke AG
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 Bayerische Motoren Werke AG filed Critical Bayerische Motoren Werke AG
Publication of EP0974985A1 publication Critical patent/EP0974985A1/fr
Withdrawn legal-status Critical Current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 invention relates to an ignition coil according to the preamble of the claim 1.
  • An ignition coil generally has the task of being provided by a battery Transform tension.
  • the ignition energy is brief stored and then on the ignition leads in the form of a high voltage surge delivered to the spark plugs.
  • a conventional ignition coil comprises a core made of laminated iron sheet, on which there is a high voltage winding of thin and above there is a primary winding made of thicker copper wire.
  • high-performance ignition coils are known, which are used for high ignition voltages and a high number of sparks are designed. For a higher spark count to reach per minute at high ignition voltage, it is necessary that the Primary current increases and also rises faster. You can by reducing the resistance of the primary winding and a Reduction of inductance by reducing the number of turns of the primary winding to reach.
  • An ignition coil the secondary winding of which is known from WO 97/41574 Has under-windings, which are excited by a primary coil at the same time become.
  • the voltages of the individual coils add up to one Total voltage, which is supplied to an ignition unit. With this Measure a high voltage within a very short period Generate period after ignition.
  • the object of the invention is therefore an ignition coil of the aforementioned Specify the type with which better combustion can be achieved.
  • the invention is based on the finding that the one stored in the ignition coil Energy to the gas to be burned as quickly as possible Ignition device is to be transmitted. For a given voltage or energy must therefore correspond to a maximum current accordingly constructive design of the primary and secondary coils become.
  • the internal resistance limiting the current should be as small as possible.
  • Decisive for the resistance with a coil is the total impedance, which results from the ohmic resistance and the Inductance.
  • the total impedance of the secondary coil should according to the invention are as low as possible, preferably below 220 Ohm.
  • the inductance should be set as low as possible, namely less than 100 mH, especially less than 40 mH.
  • the two aforementioned variables change when the Number of turns on the secondary coil side is set low, namely less than 500 turns.
  • each individual characteristic is already in its own right characterized the secondary coil, this can of course also by a Combination of all three characteristics can be determined.
  • the primary winding should be chosen so that its impedance at 1000 Hz less than 2 ohms and / or whose inductance is less than 200 ⁇ H and / or whose number of turns is less than 50.
  • d ⁇ / dt and di / dt should both be as large as possible.
  • the ignition coil core turned out to be advantageous, wherein the primary and secondary coils offset are arranged on the ring.
  • the embodiment is the ring or the oval embodiment of the ring interrupted by an air gap located in the area of the primary coil.
  • the core should preferably be laminated.
  • a nano-crystalline magnetic material can be used as the material for the core Material, for example nano-crystalline iron or corresponding iron compounds, to get voted.
  • an ignition coil according to the invention comprises an annular, laminated iron core 10 on which a primary winding 12 and a secondary winding 14, each arranged in a segment around the core.
  • a primary winding 12 and a secondary winding 14 each arranged in a segment around the core.
  • the area of the primary winding 12 is the iron core 10 from an air gap 16 interrupted, in which the energy of the ignition coil before the ignition process among other things can be saved.
  • the secondary coil 14 has 300 turns and has an inductance from 32 mH (millihenry).
  • the primary coil 12 has a number of turns of 30 and has an inductance from 140 ⁇ H.
  • the ends of the primary coil 12 are in a manner known per se with a Transistor ignition system (not shown) connected. This should be because of a additional ohmic resistance to avoid and to avoid electromagnetic interference as close as possible to the Ignition coil can be arranged.
  • the use is particularly advantageous a hybrid ignition system, the transistor of which is not covered.
  • the usage of a bare transistor and the application of the silicon directly on a ceramic carrier substrate favors the heat flow from the Transistor directly into the ceramic, which has a very high thermal conductivity owns. Furthermore, the switching speed of the transistor can be increased if additional leakage inductances are avoided.
  • a transistor with a high emitter-collector voltage in the present case about 1200 V (volts) used.
  • the maximum Switching current is about 25 A in the present case Design of the coils 12, 14 can already in the breakdown and spark discharge phase, a high energy rate in the ignited Implement gas.
  • FIGS. 2 and 3 The difference to conventional systems is shown in FIGS. 2 and 3 detect.
  • the flow in the secondary winding is shown in both diagrams Ignition current recorded over time.
  • Fig. 3 the current is recorded in a conventional high-performance ignition coil. Each unit corresponds to 50 ⁇ s. All in all, a current flows over about 300 ⁇ s, resulting in a long-lasting glow or glow phase leads. The peak current is around 200mA.
  • one unit on the time scale corresponds to 20 ⁇ s. All in all In the ignition coil according to the invention, a current therefore flows over approximately 50 ⁇ s, with a peak value of about 1.2 A.
  • the invention can improve combustion overall and thus an increase in performance, a reduction in fuel and a reduction in pollutants can be achieved.
  • the ignition point could be 3 ° crank angle to be improved towards late.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Ignition Installations For Internal Combustion Engines (AREA)
EP99113017A 1998-07-23 1999-07-06 Bobine d'allumage Withdrawn EP0974985A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19833190 1998-07-23
DE1998133190 DE19833190A1 (de) 1998-07-23 1998-07-23 Zündspule

Publications (1)

Publication Number Publication Date
EP0974985A1 true EP0974985A1 (fr) 2000-01-26

Family

ID=7875074

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99113017A Withdrawn EP0974985A1 (fr) 1998-07-23 1999-07-06 Bobine d'allumage

Country Status (2)

Country Link
EP (1) EP0974985A1 (fr)
DE (1) DE19833190A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1884966A1 (fr) * 2006-08-01 2008-02-06 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Transformateur d'isolation
WO2010015498A1 (fr) * 2008-08-06 2010-02-11 Osram Gesellschaft mit beschränkter Haftung Générateur d'impulsions à haute tension et lampe à décharge à haute pression dotée d'un générateur d'impulsions à haute tension

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4677960A (en) * 1984-12-31 1987-07-07 Combustion Electromagnetics, Inc. High efficiency voltage doubling ignition coil for CD system producing pulsed plasma type ignition
WO1990013742A1 (fr) * 1989-05-12 1990-11-15 Combustion Electromagnetics, Inc. Bobine compacte d'allumage a decharge capacitive, a rendement et puissance eleves
EP0652366A2 (fr) * 1993-11-08 1995-05-10 Chrysler Corporation Méthode de détection d'auto-allumage
WO1997021920A1 (fr) * 1995-12-13 1997-06-19 Ward Michael A V Systeme d'allumage par induction de haute energie et faible inductance

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL7811481A (nl) * 1978-11-22 1980-05-27 Philips Nv Transformator met luchtspleet.
DE8004802U1 (de) * 1980-02-22 1980-06-12 Patent-Treuhand-Gesellschaft Fuer Elektrische Gluehlampen Mbh, 8000 Muenchen Adaptervorschaltgeraet fuer eine einsockelige entladungslampe
GB2138215B (en) * 1983-04-13 1987-05-20 Hitachi Metals Ltd Amorphous wound coil
DE3411843A1 (de) * 1984-03-30 1985-10-10 Robert Bosch Gmbh, 7000 Stuttgart Fuer mehrkerzige und verteilerlose zuendanlagen in brennkraftmaschinen bestimmte zuendspule
DE3428763C2 (de) * 1984-08-03 1986-10-02 Bertos AG, Glarus Hochleistungszündspule
NL8500463A (nl) * 1985-02-19 1986-09-16 Philips Nv Transformator met luchtspleet.
JP3453792B2 (ja) * 1993-07-09 2003-10-06 三菱電機株式会社 内燃機関用点火コイル
EP0896726A1 (fr) * 1996-04-29 1999-02-17 AlliedSignal Inc. Ensemble bobine/noyau magnetiques pour systeme d'allumage commande
US5844462A (en) * 1996-04-29 1998-12-01 Alliedsignal Inc. Magnetic core-coil assembly for spark ignition systems

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4677960A (en) * 1984-12-31 1987-07-07 Combustion Electromagnetics, Inc. High efficiency voltage doubling ignition coil for CD system producing pulsed plasma type ignition
WO1990013742A1 (fr) * 1989-05-12 1990-11-15 Combustion Electromagnetics, Inc. Bobine compacte d'allumage a decharge capacitive, a rendement et puissance eleves
EP0652366A2 (fr) * 1993-11-08 1995-05-10 Chrysler Corporation Méthode de détection d'auto-allumage
WO1997021920A1 (fr) * 1995-12-13 1997-06-19 Ward Michael A V Systeme d'allumage par induction de haute energie et faible inductance

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1884966A1 (fr) * 2006-08-01 2008-02-06 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Transformateur d'isolation
WO2010015498A1 (fr) * 2008-08-06 2010-02-11 Osram Gesellschaft mit beschränkter Haftung Générateur d'impulsions à haute tension et lampe à décharge à haute pression dotée d'un générateur d'impulsions à haute tension
US8552647B2 (en) 2008-08-06 2013-10-08 Osram Gesellschaft Mit Beschrankter Haftung High-voltage pulse generator and high-pressure discharge lamp having a high-voltage pulse generator

Also Published As

Publication number Publication date
DE19833190A1 (de) 2000-01-27

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