EP1012474B1 - Stick coil for ignition systems - Google Patents

Stick coil for ignition systems Download PDF

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Publication number
EP1012474B1
EP1012474B1 EP98954226A EP98954226A EP1012474B1 EP 1012474 B1 EP1012474 B1 EP 1012474B1 EP 98954226 A EP98954226 A EP 98954226A EP 98954226 A EP98954226 A EP 98954226A EP 1012474 B1 EP1012474 B1 EP 1012474B1
Authority
EP
European Patent Office
Prior art keywords
rod
type coil
return path
path plate
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.)
Revoked
Application number
EP98954226A
Other languages
German (de)
French (fr)
Other versions
EP1012474A1 (en
Inventor
Christian Bonnefoit
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=8051190&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP1012474(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP1012474A1 publication Critical patent/EP1012474A1/en
Application granted granted Critical
Publication of EP1012474B1 publication Critical patent/EP1012474B1/en
Anticipated expiration legal-status Critical
Revoked legal-status Critical Current

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Classifications

    • 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
    • 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 is based on a rod coil for ignition systems, especially as an ignition coil in internal combustion engines from Motor vehicles according to the preamble of claim 1.
  • a rod coil is known from DE 41 32 851 A1 has a cylindrical housing in the basic form. To the A primary connection with contact elements is attached to the housing, the electrical with winding ends one in the housing arranged coil set of the ignition coil are connected.
  • a rod-shaped core of an open Magnetic circuit arranged in the housing and inside the coil set.
  • the coil set from a longitudinally slotted return plate surrounded concentrically.
  • the return plate is from the spark plug shaft through the Ignition coil housing insulated.
  • the interference energy depends on the electric field strength between the back plate and Spark plug shaft from. Due to the installation location in Spark plug well, the interference energy is higher than at conventional ignition coils with one over the core material closed magnetic circuit.
  • the rod coil for ignition systems with the characteristic features of claim 1 has the opposite the advantage that the aforementioned inadequacy is avoided.
  • the rod coil is designed so that the return plate is connected to ground potential and the occurring here, contributing to a partial discharge Charge carriers can be derived against mass. This will the risk of malfunctions in electrical units of the motor vehicle reduced.
  • a rod coil 11 for ignition systems according to Figures 1, 2, especially as an ignition coil in internal combustion engines from Motor vehicles, is for direct contact with a Spark plug provided in the usual and no more shown way in a shaft in the cylinder head Internal combustion engine is used.
  • the rod coil 11 contains a coaxial arrangement Longitudinal axis 12 in a plastic housing 13 elongated, cylindrical core 14, also called an I-core referred to as.
  • the core 14 consists of layered magnetic material and is part of an open Magnetic circuit. Concentric around the core 14 is inside a low voltage primary winding 16 and external a secondary winding 17 carrying high voltage arranged.
  • the windings 16, 17 are for guiding the Magnetic field surrounded by a yoke plate 15, the is mounted on the inside of the housing 13.
  • the back plate 15 is slotted parallel to the longitudinal axis 12 by one To prevent short circuit of the magnetic field.
  • the primary connection 18 has in addition another a first contact element 19, which is electrically on Ground potential is.
  • This first contact element 19 is Part of a busbar 21 designed as a sheet metal strip, which in the first embodiment of Figure 1 with a free end 22 with a resistance element 23 electrically connected is.
  • the resistance element 23 is again electrically connected to the return plate 15.
  • the resistance element 23 or the sheet metal strip 24 cause an equalization of the charge carriers, so that none Interference energy due to a high-energy partial discharge occurs.

Description

Stand der TechnikState of the art

Die Erfindung geht aus von einer Stabspule für Zündanlagen, insbesondere als Zündspule in Brennkraftmaschinen von Kraftfahrzeugen nach der Gattung des Anspruchs 1.The invention is based on a rod coil for ignition systems, especially as an ignition coil in internal combustion engines from Motor vehicles according to the preamble of claim 1.

Durch die DE 41 32 851 A1 ist eine Stabspule bekannt, die ein in der Grundform zylindrisches Gehäuse aufweist. An dem Gehäuse ist ein Primäranschluß mit Kontaktelementen angefügt, die elektrisch mit Wicklungsenden eines im Gehäuse angeordneten Spulensatzes der Zündspule verbunden sind.A rod coil is known from DE 41 32 851 A1 has a cylindrical housing in the basic form. To the A primary connection with contact elements is attached to the housing, the electrical with winding ends one in the housing arranged coil set of the ignition coil are connected.

In dem Gehäuse und innerhalb des Spulensatzes ist in zentraler Lage ein stabförmiger Kern eines offenen Magnetkreises angeordnet. Zur Führung des Magnetfeldes ist der Spulensatz von einem längsgeschlitztem Rückschlußblech konzentrisch umgeben.In the housing and inside the coil set is in central location a rod-shaped core of an open Magnetic circuit arranged. To guide the magnetic field is the coil set from a longitudinally slotted return plate surrounded concentrically.

Beim Betrieb der Zündspule tritt eine aus einer äußeren Teilentladung stammende Störenergie auf, die über kapazitive Umladungsprozesse am Primäranschluß anliegt. Das Rückschlußblech ist vom Zündkerzenschacht durch das Zündspulengehäuse isoliert. Die Störenergie hängt von der elektrischen Feldstärke zwischen Rückschlußblech und Zündkerzenschacht ab. Aufgrund des Einbauortes im Zündkerzenschacht ist die Störenergie höher als bei konventionellen Zündspulen mit einem über das Kernmaterial geschlossenen Magnetkreis.When the ignition coil is operating, one emerges from an external one Interference energy originating from partial discharge via capacitive Transhipment processes at the primary connection. The The return plate is from the spark plug shaft through the Ignition coil housing insulated. The interference energy depends on the electric field strength between the back plate and Spark plug shaft from. Due to the installation location in Spark plug well, the interference energy is higher than at conventional ignition coils with one over the core material closed magnetic circuit.

Durch die erhöhte Störenergie, die sich über den Primäranschluß und den daran angeschlossenen Leitungen in das Bordnetz des Kraftfahrzeugs ausbreiten kann, kann es in anderen elektrischen Komponenten des Kraftfahrzeugs, wie in einem Steuergerät oder in einem Rundfunkempfänger zu unerwünschten Funktionsbeeinträchtigungen kommen.Due to the increased interference energy that spreads over the Primary connection and the lines connected to it can spread the vehicle electrical system, it can in other electrical components of the motor vehicle, as in a control unit or in a radio receiver undesirable functional impairments.

Vorteile der ErfindungAdvantages of the invention

Die erfindungsgemäße Stabspule für Zündanlagen mit den kennzeichnenden Merkmalen des Anspruchs 1 hat dem gegenüber den Vorteil, daß die zuvor erwähnte Unzulänglichkeit vermieden wird. Dazu ist die Stabspule so ausgebildet, daß das Rückschlußblech auf Massepotential gelegt ist und die hier auftretenden, zu einer Teilentladung beitragenden Ladungsträger gegen Masse abgeleitet werden. Dadurch wird die Gefahr von Funktionsstörungen in elektrischen Aggregaten des Kraftfahrzeugs vermindert.The rod coil for ignition systems with the characteristic features of claim 1 has the opposite the advantage that the aforementioned inadequacy is avoided. For this purpose, the rod coil is designed so that the return plate is connected to ground potential and the occurring here, contributing to a partial discharge Charge carriers can be derived against mass. This will the risk of malfunctions in electrical units of the motor vehicle reduced.

In den Unteransprüchen sind vorteilhafte Ausgestaltungen für die Realisierung der Erfindung angegeben.Advantageous refinements for are in the dependent claims stated the realization of the invention.

In bestimmten Fällen führt eine direkte Kontaktierung des Rückschlußbleches an Masse zu einem Spannungsverlust auf der Hochspannung führenden Sekundärseite der Zündspule.
In diesem Fall muß, entsprechend einer bevorzugten Ausführungsform des Anspruchs 2, zur Vermeidung dieses Verlustes ein Widerstandselement mit ausreichend hohem Widerstand zwischen Rückschlußblech und Massepotential geschaltet werden.In certain cases, direct contacting of the return plate to ground leads to a voltage loss on the secondary side of the ignition coil carrying high voltage.
In this case, according to a preferred embodiment of claim 2, a resistance element with a sufficiently high resistance between the return plate and ground potential must be connected to avoid this loss.

Zeichnungdrawing

Zwei Ausführungsbeispiele der Erfindung sind in der Zeichnung dargestellt und in der Figurenbeschreibung näher erläutert. Jeweils ausschnittsweise in einem Teilschnitt zeigt die Figur 1 das erste und die Figur 2 das zweite Ausführungsbeispiel.Two embodiments of the invention are in the Drawing shown and in the figure description closer explained. Partially in a partial cut Figure 1 shows the first and Figure 2 shows the second Embodiment.

Beschreibung der AusführungsbeispieleDescription of the embodiments

Eine Stabspule 11 für Zündanlagen nach den Figuren 1, 2, insbesondere als Zündspule in Brennkraftmaschinen von Kraftfahrzeugen, ist zur Direktkontaktierung mit einer Zündkerze vorgesehen, die in üblicher und nicht mehr dargestellter Weise in einem Schacht im Zylinderkopf einer Brennkraftmaschine eingesetzt ist.A rod coil 11 for ignition systems according to Figures 1, 2, especially as an ignition coil in internal combustion engines from Motor vehicles, is for direct contact with a Spark plug provided in the usual and no more shown way in a shaft in the cylinder head Internal combustion engine is used.

Die Stabspule 11 enthält in koaxialer Anordnung zu einer Längsachse 12 in einem Gehäuse 13 aus Kunststoff einen länglichen, zylindrischen Kern 14, der auch als I-Kern bezeichnet wird. Der Kern 14 besteht aus geschichtetem magnetischen Material und ist Teil eines offenen Magnetkreises. Konzentrisch um den Kern 14 ist innenliegend eine Niederspannung führende Primärwicklung 16 und außenliegend eine Hochspannung führende Sekundärwicklung 17 angeordnet. Die Wicklungen 16, 17 sind zur Führung des Magnetfeldes von einem Rückschlußblech 15 umgeben, das innenseitig an dem Gehäuse 13 gelagert ist. Das Rückschlußblech 15 ist parallel zur Längsachse 12 geschlitzt, um einen Kurzschluß des Magnetfeldes zu verhindern. The rod coil 11 contains a coaxial arrangement Longitudinal axis 12 in a plastic housing 13 elongated, cylindrical core 14, also called an I-core referred to as. The core 14 consists of layered magnetic material and is part of an open Magnetic circuit. Concentric around the core 14 is inside a low voltage primary winding 16 and external a secondary winding 17 carrying high voltage arranged. The windings 16, 17 are for guiding the Magnetic field surrounded by a yoke plate 15, the is mounted on the inside of the housing 13. The back plate 15 is slotted parallel to the longitudinal axis 12 by one To prevent short circuit of the magnetic field.

An einem Ende der Stabspule 11 ist einteilig mit dem Gehäuse 13 ein Steckerkörper als Teil eines Primäranschluß 18 der Stabspule 11 ausgebildet. Der Primäranschluß 18 weist neben anderen ein erstes Kontaktelement 19 auf, das elektrisch auf Massepotential liegt. Dieses erste Kontaktelement 19 ist Teil einer als Blechstreifen ausgebildeten Stromschiene 21, die in dem ersten Ausführungsbeispiel nach Figur 1 mit einem freien Ende 22 mit einem Widerstandselement 23 elektrisch verbunden ist. Das Widerstandselement 23 ist wiederum elektrisch mit dem Rückschlußblech 15 verbunden.At one end of the rod coil 11 is in one piece with the housing 13 a connector body as part of a primary connection 18 Rod coil 11 formed. The primary connection 18 has in addition another a first contact element 19, which is electrically on Ground potential is. This first contact element 19 is Part of a busbar 21 designed as a sheet metal strip, which in the first embodiment of Figure 1 with a free end 22 with a resistance element 23 electrically connected is. The resistance element 23 is again electrically connected to the return plate 15.

Ist kein Widerstandselement 23 erforderlich, wird entsprechend dem zweiten Ausführungsbeispiel nach Figur 2 statt dessen als eine elektrische Brücke ein Blechstreifen 24 eingesetzt.If no resistance element 23 is required, corresponding to the second exemplary embodiment according to FIG. 2 instead a sheet metal strip as an electrical bridge 24 used.

Das Widerstandselement 23 bzw. der Blechstreifen 24 bewirken einen Ausgleich der Ladungsträger, so daß hier keine Störenergie aufgrund einer energiereichen Teilentladung auftritt.The resistance element 23 or the sheet metal strip 24 cause an equalization of the charge carriers, so that none Interference energy due to a high-energy partial discharge occurs.

Claims (6)

  1. Rod-type coil for ignition systems, in particular as an ignition coil in internal combustion engines for motor vehicles, having a housing (13) in which a core (14) as an inner magnetic iron core and magnetic return path plate as an outer magnetic iron core are mounted as parts of an open magnetic circuit, characterized in that the magnetic return path plate is at least indirectly electrically connected to earth potential.
  2. Rod-type coil according to Claim 1, characterized in that the magnetic return path plate (15) is electrically connected to earth potential either via a resistance element (23) or via an electrical link (24).
  3. Rod-type coil according to Claim 2, characterized in that the electrical link is in the form of a sheet-metal strip (24).
  4. Rod-type coil according to Claim 3, characterized in that a primary short (18) with at least two contact elements for supplying a low voltage is fitted to the housing (13), and the magnetic return path plate (15) is connected to a first contact element (19) of these contact elements, which is electrically at earth potential.
  5. Rod-type coil according to Claim 4, characterized in that the first contact element (19) is a part of a busbar (21).
  6. Rod-type coil according to Claim 5, characterized in that the core (14) is in the form of a rod as an I-core composed of laminated material, and the magnetic return path plate (15) is tubular.
EP98954226A 1998-01-13 1998-09-25 Stick coil for ignition systems Revoked EP1012474B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE29800453U 1998-01-13
DE29800453U DE29800453U1 (en) 1998-01-13 1998-01-13 Rod coil for ignition systems
PCT/DE1998/002855 WO1999036693A1 (en) 1998-01-13 1998-09-25 Stick coil for ignition systems

Publications (2)

Publication Number Publication Date
EP1012474A1 EP1012474A1 (en) 2000-06-28
EP1012474B1 true EP1012474B1 (en) 2003-04-02

Family

ID=8051190

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Application Number Title Priority Date Filing Date
EP98954226A Revoked EP1012474B1 (en) 1998-01-13 1998-09-25 Stick coil for ignition systems

Country Status (7)

Country Link
US (1) US6222435B1 (en)
EP (1) EP1012474B1 (en)
JP (1) JP2001515565A (en)
KR (1) KR20000071118A (en)
BR (1) BR9808022A (en)
DE (2) DE29800453U1 (en)
WO (1) WO1999036693A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3891208B2 (en) * 2005-07-12 2007-03-14 株式会社デンソー Ignition coil and manufacturing method thereof
KR100775431B1 (en) * 2006-02-20 2007-11-12 삼성전자주식회사 Apparatus and Method for System Imbedded System and Firmware Updating Method Therein
JP2017059682A (en) * 2015-09-16 2017-03-23 株式会社デンソー Ignition coil for internal combustion engine

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57193776A (en) * 1981-05-26 1982-11-29 Tdk Corp Ignition device
DE3915113A1 (en) * 1989-05-09 1990-11-15 Bremicker Auto Elektrik Ignition system - for otto cycle engine with screened ignition coil on each spark plug
JPH0462359U (en) * 1990-10-03 1992-05-28
JPH09186029A (en) * 1995-12-27 1997-07-15 Aisan Ind Co Ltd Ignition coil for internal combustion engine

Also Published As

Publication number Publication date
JP2001515565A (en) 2001-09-18
EP1012474A1 (en) 2000-06-28
DE29800453U1 (en) 1999-05-12
DE59807756D1 (en) 2003-05-08
WO1999036693A1 (en) 1999-07-22
US6222435B1 (en) 2001-04-24
BR9808022A (en) 2000-03-08
KR20000071118A (en) 2000-11-25

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