JP2011077485A - Ignition coil for internal combustion engine - Google Patents

Ignition coil for internal combustion engine Download PDF

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JP2011077485A
JP2011077485A JP2009230473A JP2009230473A JP2011077485A JP 2011077485 A JP2011077485 A JP 2011077485A JP 2009230473 A JP2009230473 A JP 2009230473A JP 2009230473 A JP2009230473 A JP 2009230473A JP 2011077485 A JP2011077485 A JP 2011077485A
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terminal pin
coil
terminal
internal combustion
combustion engine
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Akikimi Nobutoki
明公 信時
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Hanshin Electric Co Ltd
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Hanshin Electric Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide an ignition coil for an internal combustion engine capable of electrically connecting a terminal pin and a high-pressure terminal, without fail. <P>SOLUTION: The ignition coil for an internal combustion engine includes a primary coil and a secondary coil wound around a coil bobbin, an iron core magnetically coupling these two coils, and an insulating case for accommodating them therein. The primary coil, the secondary coil, the iron core, and the like, are fixed and held by an insulated synthetic resin with which the insulating case is filled. A curved portion is formed in a tip of a terminal pin connected to the secondary coil; a recessed groove is formed at a side of a high pressure terminal electrically connected with the terminal pin; and the curved portion formed in the tip of the terminal pin is fitted and conducted into the recessed groove formed on the side of the high-pressure terminal, thereby electrically connecting the terminal pin and the high-pressure terminal, without fail. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

本発明は、例えば自動車等のエンジンの点火プラグに火花放電を発生させるために高圧電流を供給するモールド型の内燃機関用点火コイルに関する。   The present invention relates to a molded type ignition coil for an internal combustion engine that supplies a high-voltage current to generate a spark discharge in an ignition plug of an engine such as an automobile.

図４は、従来の内燃機関用点火コイルにおける高圧端子と端末ピンとの関係を示す縦断面図である。図４において、内燃機関用点火コイル１は、鉄心・コイル組立体２と、この鉄心・コイル組立体２を収容する合成樹脂製の絶縁ケース３と、この絶縁ケース３の高圧タワー部に取り付けられた高圧端子４と、絶縁ケース３内に各構成部品を絶縁しながら固定する絶縁性を有した熱硬化性樹脂５等で構成されている。   FIG. 4 is a longitudinal sectional view showing the relationship between a high voltage terminal and a terminal pin in a conventional ignition coil for an internal combustion engine. In FIG. 4, an ignition coil 1 for an internal combustion engine is attached to an iron core / coil assembly 2, a synthetic resin insulating case 3 that accommodates the iron core / coil assembly 2, and a high-pressure tower portion of the insulating case 3. The high-voltage terminal 4 and the thermosetting resin 5 having an insulating property for fixing each component in the insulating case 3 while being insulated.

上記した鉄心・コイル組立体２は、閉磁路を形成する鉄心６と、鉄心６が挿通される一次コイルボビン７と、この一次コイルボビン７に巻回された一次コイル８と、一次コイル８が挿通され、一次コイルボビン７と同心状に形成された二次コイルボビン９と、この二次コイルボビン９に巻回された二次コイル１０と、二次コイル１０の巻き終わりが接続された端末ピン１１とで構成されている。そして、二次コイル１０の巻き終わりが接続された端末ピン１１は、アルミや黄銅などで円柱または円錐状に切削加工またはプレス加工された高圧端子４に対応するように位置決めされ、自身の弾性によって高圧端子４に圧接するよう配設されている。   The above-described iron core / coil assembly 2 includes an iron core 6 that forms a closed magnetic circuit, a primary coil bobbin 7 through which the iron core 6 is inserted, a primary coil 8 wound around the primary coil bobbin 7, and a primary coil 8. A secondary coil bobbin 9 formed concentrically with the primary coil bobbin 7, a secondary coil 10 wound around the secondary coil bobbin 9, and a terminal pin 11 to which the winding end of the secondary coil 10 is connected Has been. The terminal pin 11 to which the winding end of the secondary coil 10 is connected is positioned so as to correspond to the high-voltage terminal 4 that has been cut or pressed into a cylindrical shape or a conical shape with aluminum, brass, or the like. The high voltage terminal 4 is disposed so as to be in pressure contact.

絶縁ケース３の下端部は、高圧端子４を収納した高圧タワー部１２となっており、プロテクター１３に嵌合されている。また、プロテクター１３の下端は、点火プラグ１４に嵌合されるとともに、プロテクター１３の内部に収納されたスプリング１５が高圧端子４と点火プラグ１４を電気的に接続している。   The lower end of the insulating case 3 is a high-voltage tower 12 that houses the high-voltage terminal 4, and is fitted to a protector 13. Further, the lower end of the protector 13 is fitted to the spark plug 14, and a spring 15 housed in the protector 13 electrically connects the high voltage terminal 4 and the spark plug 14.

以上のように構成された内燃機関用点火コイル１の一次コイル８に、一次端子１６および両一次端末ピン等を介して所定の電流を通電した後に遮断すると、二次コイル１０に発生した高電圧の電流が、端末ピン１１を介して高圧端子４、スプリング１５から点火プラグ１４へ供給される。   When the primary coil 8 of the internal combustion engine ignition coil 1 configured as described above is cut off after a predetermined current is passed through the primary terminal 16 and both primary terminal pins, the high voltage generated in the secondary coil 10 Is supplied from the high-voltage terminal 4 and the spring 15 to the spark plug 14 via the terminal pin 11.

特開２００９−２７０６４号公報JP 2009-27064 A

しかし、このような構成の従来の内燃機関用点火コイルにおいて、二次コイルの高圧側端末の寸法によって、高圧端子と接触する位置が異なり、接触面積にばらつきが発生していた。このため、製造の初期に電気的導通が得られても、点火コイルの稼働時に内部温度が上昇した場合、線材と高圧端子と熱硬化性樹脂との線膨張係数が異なり、端末ピンと高圧端子の接続部において、端末ピン自体の弾性により保持されていた接触が遮断され、導通不良が発生する場合があった。   However, in the conventional ignition coil for an internal combustion engine having such a configuration, the position of contact with the high voltage terminal differs depending on the size of the high voltage side terminal of the secondary coil, and the contact area varies. For this reason, even if electrical continuity is obtained at the initial stage of manufacture, when the internal temperature rises during operation of the ignition coil, the linear expansion coefficients of the wire, the high voltage terminal, and the thermosetting resin are different, and the terminal pin and the high voltage terminal In the connection portion, the contact held by the elasticity of the terminal pin itself is interrupted, and a conduction failure may occur.

この発明は、上記に鑑み提案されたもので、端末ピンの先端に湾曲部を形成するとともに、端末ピンと電気的に接続される高圧端子側に凹溝を形成して、湾曲部を凹溝に嵌合することにより電気的接続を確実にできる内燃機関用点火コイルを提供することを目的とするものである。   The present invention has been proposed in view of the above. A curved portion is formed at the tip of the terminal pin, a concave groove is formed on the high-voltage terminal side electrically connected to the terminal pin, and the curved portion is formed into a concave groove. It is an object of the present invention to provide an ignition coil for an internal combustion engine that can ensure electrical connection by fitting.

上記目的を達成する為に本発明の内燃機関用点火コイルは、コイルボビンに巻回された一次コイル及び二次コイルと、これら二つのコイルを磁気的に結合させる鉄心と、これらを収容する絶縁ケースとを備え、前記絶縁ケース内に充填された絶縁性合成樹脂によって一次コイル、二次コイル、鉄心等を固定保持する内燃機関用点火コイルであって、前記二次コイルに接続された端末ピンの先端に湾曲部を形成するとともに、前記端末ピンと電気的に接続される高圧端子側に凹溝を形成し、前記端末ピンの先端に形成された湾曲部を、高圧端子側に形成された凹溝内に嵌合して導通させることを特徴としている。   In order to achieve the above object, an ignition coil for an internal combustion engine according to the present invention includes a primary coil and a secondary coil wound around a coil bobbin, an iron core that magnetically couples these two coils, and an insulating case that houses them. An ignition coil for an internal combustion engine that fixes and holds a primary coil, a secondary coil, an iron core, etc. with an insulating synthetic resin filled in the insulating case, and a terminal pin connected to the secondary coil A concave portion is formed on the high-voltage terminal side, and a concave groove is formed on the high-voltage terminal side that is electrically connected to the terminal pin. It is characterized in that it is fitted inside and made conductive.

また、本発明において、前記端末ピンの湾曲部は、先端が凸のＵ字状に形成されたことを特徴とする。   In the present invention, the curved portion of the terminal pin is formed in a U shape with a convex tip.

また、本発明において、前記端末ピンの湾曲部は、複数回に渡って屈折させて形成したことを特徴とする。   In the present invention, the curved portion of the terminal pin is formed by being refracted a plurality of times.

また、本発明において、前記端末ピン保持部は、前記端末ピンのほぼ中央に当接するように配設されたことを特徴とする。   In the present invention, the terminal pin holding portion is disposed so as to be in contact with substantially the center of the terminal pin.

この発明は上記した構成からなるので、以下に説明するような効果を奏することができる。   Since this invention consists of an above-described structure, there can exist an effect which is demonstrated below.

本発明では、コイルボビンに巻回された一次コイル及び二次コイルと、これら二つのコイルを磁気的に結合させる鉄心と、これらを収容する絶縁ケースとを備え、前記絶縁ケース内に充填された絶縁性合成樹脂によって一次コイル、二次コイル、鉄心等を固定保持する内燃機関用点火コイルであって、前記二次コイルに接続された端末ピンの先端に湾曲部を形成するとともに、前記端末ピンと電気的に接続される高圧端子側に凹溝を形成し、前記端末ピンの先端に形成された湾曲部を、高圧端子側に形成された凹溝内に嵌合して導通させるので、端末ピンを確実に高圧端子に接触させて電気的に導通させることができる。したがって、点火コイルの稼働時に発生する熱応力による導通不良等を未然に防止することができる。   In the present invention, there are provided a primary coil and a secondary coil wound around a coil bobbin, an iron core that magnetically couples these two coils, and an insulating case that accommodates them, and the insulating case filled in the insulating case An ignition coil for an internal combustion engine in which a primary coil, a secondary coil, an iron core, etc. are fixedly held by a synthetic resin, and a curved portion is formed at a tip of a terminal pin connected to the secondary coil, and the terminal pin and the electric coil A concave groove is formed on the side of the high-voltage terminal to be connected to the end, and the curved portion formed at the end of the terminal pin is fitted into the concave groove formed on the side of the high-voltage terminal so that the terminal pin is made conductive. The electrical connection can be ensured by reliably contacting the high voltage terminal. Therefore, it is possible to prevent conduction failure due to thermal stress generated during operation of the ignition coil.

また、本発明において前記端末ピンの湾曲部は、先端が凸のＵ字状に形成されたので、高圧端子側に形成された凹溝内への嵌合作業が容易である。   Further, in the present invention, the bent portion of the terminal pin is formed in a U-shape with a convex tip, so that the fitting operation into the recessed groove formed on the high-voltage terminal side is easy.

また、本発明において前記端末ピンの湾曲部は、複数回に渡って屈折させて形成したので、高圧端子との接触面積にばらつきが生じることなく、安定した導通を得ることができる。また、線材、高圧端子、絶縁材料間の線膨張係数の差に起因する温度ストレスに拘わらず、端末ピンと高圧端子間の接触が外れることなく、安定した電気的導通を確保することができる。   Further, in the present invention, the bent portion of the terminal pin is formed by being refracted a plurality of times, so that stable conduction can be obtained without causing variations in the contact area with the high voltage terminal. Further, stable electrical continuity can be ensured without losing contact between the terminal pin and the high-voltage terminal, regardless of temperature stress caused by the difference in linear expansion coefficient among the wire, high-voltage terminal, and insulating material.

図１は、本発明の内燃機関用点火コイルにおける高圧端子と端末ピンとの関係を示す縦断面図である。FIG. 1 is a longitudinal sectional view showing the relationship between a high voltage terminal and a terminal pin in an ignition coil for an internal combustion engine according to the present invention. 図２は、同高圧端子と端末ピンとの関係を示す拡大斜視図である。FIG. 2 is an enlarged perspective view showing the relationship between the high-voltage terminal and the terminal pin. 図３は、端末ピンの他の実施例を示す拡大斜視図である。FIG. 3 is an enlarged perspective view showing another embodiment of the terminal pin. 図４は、従来の内燃機関用点火コイルにおける高圧端子と端末ピンとの関係を示す縦断面図である。FIG. 4 is a longitudinal sectional view showing the relationship between a high voltage terminal and a terminal pin in a conventional ignition coil for an internal combustion engine.

内燃機関用点火コイルにおいて、端末ピンの先端に湾曲部を形成するとともに、端末ピンと電気的に接続される高圧端子側に前記湾曲部の挿着可能な凹溝を形成して、湾曲部を凹溝に嵌合することにより、端末ピンと高圧端子を確実に接触させて電気的導通の信頼性を向上することができる。   In the ignition coil for an internal combustion engine, a curved portion is formed at the tip of the terminal pin, and a concave groove into which the curved portion can be inserted is formed on the high-voltage terminal side electrically connected to the terminal pin. By fitting in the groove, the terminal pin and the high voltage terminal can be brought into reliable contact with each other, and the reliability of electrical conduction can be improved.

以下、一実施の形態を示す図面に基づいて本発明を詳細に説明する。図１は本発明の内燃機関用点火コイルにおける高圧端子と端末ピンとの関係を示す縦断面図である。ここで、内燃機関用点火コイル２０は、一次コイルボビン２１、二次コイルボビン２２に巻回された一次コイル２３及び二次コイル２４と、これら二つのコイルを磁気的に結合させる鉄心２５と、これらを収容する絶縁ケース２６とを備え、前記絶縁ケース２６内に充填された絶縁性合成樹脂２７によって一次コイル２３、二次コイル２４、鉄心２５等を固定保持するものであって、前記二次コイル２４に接続された端末ピン２８の先端に湾曲部２８ａを形成するとともに、前記端末ピン２８と電気的に接続される高圧端子２９側に凹溝３０を形成し、前記端末ピン２８の先端に形成された湾曲部２８ａを、高圧端子側に形成された凹溝３０内に嵌合して導通させる構成である。   Hereinafter, the present invention will be described in detail with reference to the drawings illustrating an embodiment. FIG. 1 is a longitudinal sectional view showing a relationship between a high voltage terminal and a terminal pin in an ignition coil for an internal combustion engine according to the present invention. Here, the ignition coil 20 for the internal combustion engine includes a primary coil bobbin 21, a primary coil 23 and a secondary coil 24 wound around a secondary coil bobbin 22, an iron core 25 that magnetically couples these two coils, and these. A primary coil 23, a secondary coil 24, an iron core 25, and the like are fixedly held by an insulating synthetic resin 27 filled in the insulating case 26. A curved portion 28a is formed at the tip of the terminal pin 28 connected to the terminal pin 28, and a concave groove 30 is formed on the side of the high voltage terminal 29 electrically connected to the terminal pin 28, and is formed at the tip of the terminal pin 28. The bent portion 28a is fitted into a concave groove 30 formed on the high-voltage terminal side to be conducted.

二次コイルボビン２２は、二次コイルを分巻きするために複数の鍔部２２ａを有している。また、二次コイルボビン２２の一端に取り付けられた端末ピン２８は、下方に配設された高圧端子２９の方向に延設されるとともに、先端に湾曲部２８ａが形成されている。図２に示すように、端末ピン２８の湾曲部２８ａは、Ｕ字状に折り返されて、先端が凸に形成されている。
また、湾曲部２８ａは、対向配置された凹溝３０に略嵌合可能な直径寸法Ｗに形成されている。折り返し高さＨは、凹溝３０の深さと略等しい。また、凹溝３０は、例えば、円筒状に形成されているが、湾曲部２８ａが嵌合可能であれば、他の形状であってもよい。 The secondary coil bobbin 22 has a plurality of flange portions 22a for dividing the secondary coil. The terminal pin 28 attached to one end of the secondary coil bobbin 22 extends in the direction of the high voltage terminal 29 disposed below, and has a curved portion 28a at the tip. As shown in FIG. 2, the bending portion 28 a of the terminal pin 28 is folded back in a U-shape and has a convex end.
In addition, the curved portion 28a is formed to have a diameter W that can be substantially fitted into the concave grooves 30 that are arranged to face each other. The folding height H is substantially equal to the depth of the concave groove 30. In addition, the concave groove 30 is formed in a cylindrical shape, for example, but may have another shape as long as the curved portion 28a can be fitted.

図３は、端末ピンの他の実施例を示す拡大斜視図であり、端末ピン２８の湾曲部２８ｂは、複数回に渡って屈折させた、先端が凸の形状である。この場合においても、湾曲部２８ａは、対向配置された高圧端子２９の凹溝３０に嵌合可能な直径寸法Ｗに形成されている。また、折り返し高さＨも、凹溝３０の深さと略等しく形成する。   FIG. 3 is an enlarged perspective view showing another embodiment of the terminal pin, and the curved portion 28b of the terminal pin 28 has a convex shape that is refracted a plurality of times. Also in this case, the curved portion 28a is formed to have a diameter W that can be fitted into the concave groove 30 of the high-voltage terminal 29 that is disposed to face the curved portion 28a. Further, the folding height H is also formed approximately equal to the depth of the concave groove 30.

以上のように構成された内燃機関用点火コイル２０の組立手順について説明する。先ず、絶縁ケース２６の高圧タワー部１２に高圧端子２９を配設した後、一次コイル２３、二次コイル２４、鉄心２５等から成る組立体を絶縁ケース２６内に収納する。   A procedure for assembling the ignition coil 20 for the internal combustion engine configured as described above will be described. First, after the high voltage terminal 29 is disposed in the high voltage tower section 12 of the insulating case 26, an assembly including the primary coil 23, the secondary coil 24, the iron core 25 and the like is accommodated in the insulating case 26.

この際に、組立体の下端側に延設された端末ピン２８の湾曲部２８ａは、高圧端子２９の上端に形成された凹溝３０内に嵌合される。その後、絶縁性合成樹脂２７を注入して、各構成部品を絶縁しながら固定する。   At this time, the curved portion 28 a of the terminal pin 28 extending to the lower end side of the assembly is fitted into a concave groove 30 formed at the upper end of the high-voltage terminal 29. Thereafter, an insulating synthetic resin 27 is injected to fix each component while being insulated.

このようにして製造された内燃機関用点火コイル２０は、端末ピン２８と高圧端子２９とは、端末ピン２８の湾曲部２８ａが凹溝３０に圧入されているので、電気的接触を確実にすることができる。また、熱応力等によって端末ピン２８に力が加わった場合であっても、湾曲部２８ａは線材自体の有する弾性力により反発し、端末ピン２８と高圧端子２９との接触が外れ、導通が遮断される虞れがない。   In the ignition coil 20 for an internal combustion engine manufactured in this way, the terminal pin 28 and the high voltage terminal 29 ensure electrical contact because the curved portion 28a of the terminal pin 28 is press-fitted into the concave groove 30. be able to. Even when a force is applied to the terminal pin 28 due to thermal stress or the like, the curved portion 28a is repelled by the elastic force of the wire itself, the contact between the terminal pin 28 and the high-voltage terminal 29 is released, and conduction is interrupted. There is no fear of being done.

また、図３に示すように端末ピン２８の湾曲部２８ｂを複数回に渡って屈折させた先端が凸の形状とした場合には、凹溝３０内への嵌合作業を容易にすることができる。更に、端末ピン２８を凹溝３０から抜け難い構成とすることができる。   In addition, as shown in FIG. 3, when the tip of the bent portion 28 b of the terminal pin 28 refracted a plurality of times has a convex shape, the fitting operation into the concave groove 30 can be facilitated. it can. Furthermore, the terminal pin 28 can be configured not to easily come out of the recessed groove 30.

以上のように本願発明の構成によれば、二次コイルの高圧側端末に寸法のばらつきがあった場合でも、高圧端子の凹溝内に確実に圧入できるために、点火コイルの稼働時に発生する温度ストレスによって、接触が離れてしまう虞れもなく、信頼性の向上を達成することができる。   As described above, according to the configuration of the present invention, even when there is a variation in dimensions on the high voltage side terminal of the secondary coil, it can be reliably press-fitted into the concave groove of the high voltage terminal. The reliability can be improved without fear of the contact being separated due to the temperature stress.

１ 内燃機関用点火コイル
２ 鉄心・コイル組立体
３ 絶縁ケース
４ 高圧端子
５ 熱硬化性樹脂
６ 鉄心
７ 一次コイルボビン
８ 一次コイル
９ 二次コイルボビン
１０ 二次コイル
１１ 端末ピン
１２ 高圧タワー部
１３ プロテクター
１４ 点火プラグ
１５ スプリング
１６ 一次端子
２０ 内燃機関用点火コイル
２１ 一次コイルボビン
２２ 二次コイルボビン
２３ 一次コイル
２４ 二次コイル
２５ 鉄心
２６ 絶縁ケース
２７ 絶縁性合成樹脂
２８ 端末ピン
２８ａ 湾曲部
２９ 高圧端子
３０ 凹溝 DESCRIPTION OF SYMBOLS 1 Ignition coil for internal combustion engines 2 Iron core and coil assembly 3 Insulation case 4 High voltage terminal 5 Thermosetting resin 6 Iron core 7 Primary coil bobbin 8 Primary coil 9 Secondary coil bobbin 10 Secondary coil 11 Terminal pin 12 High voltage tower part 13 Protector 14 Ignition Plug 15 Spring 16 Primary terminal 20 Ignition coil 21 for internal combustion engine Primary coil bobbin 22 Secondary coil bobbin 23 Primary coil 24 Secondary coil 25 Iron core 26 Insulating case 27 Insulating synthetic resin 28 Terminal pin 28a Bending portion 29 High voltage terminal 30 Concave groove

Claims (3)

コイルボビンに巻回された一次コイル及び二次コイルと、これら二つのコイルを磁気的に結合させる鉄心と、これらを収容する絶縁ケースとを備え、前記絶縁ケース内に充填された絶縁性合成樹脂によって一次コイル、二次コイル、鉄心等を固定保持する内燃機関用点火コイルであって、
前記二次コイルに接続された端末ピンの先端に湾曲部を形成するとともに、
前記端末ピンと電気的に接続される高圧端子側に凹溝を形成し、
前記端末ピンの先端に形成された湾曲部を、高圧端子側に形成された凹溝内に嵌合して導通させることを特徴とする内燃機関用点火コイル。 A primary coil and a secondary coil wound around a coil bobbin, an iron core that magnetically couples these two coils, and an insulating case that accommodates them, and an insulating synthetic resin filled in the insulating case An ignition coil for an internal combustion engine that fixes and holds a primary coil, a secondary coil, an iron core, etc.
While forming a curved portion at the tip of the terminal pin connected to the secondary coil,
Forming a concave groove on the high-voltage terminal side electrically connected to the terminal pin;
An ignition coil for an internal combustion engine, wherein a bending portion formed at a tip of the terminal pin is fitted into a concave groove formed on a high-voltage terminal side to be conducted. 前記端末ピンの湾曲部は、先端が凸のＵ字状に形成されたことを特徴とする請求項１に記載の内燃機関用点火コイル。   2. The ignition coil for an internal combustion engine according to claim 1, wherein the curved portion of the terminal pin is formed in a U shape having a convex tip. 前記端末ピンの湾曲部は、複数回に渡って屈折させて形成したことを特徴とする請求項１または２に記載の内燃機関用点火コイル。   The ignition coil for an internal combustion engine according to claim 1 or 2, wherein the curved portion of the terminal pin is formed by being refracted a plurality of times.
JP2009230473A 2009-10-02 2009-10-02 Ignition coil for internal combustion engine Withdrawn JP2011077485A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013229484A (en) * 2012-04-26 2013-11-07 Denso Corp Ignition coil for internal combustion engine
JP2014154771A (en) * 2013-02-12 2014-08-25 Denso Corp Ignition coil for internal combustion engine
US10622140B2 (en) 2016-07-21 2020-04-14 Borgwarner Ludwigsburg Gmbh High voltage contact for an ignition coil

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013229484A (en) * 2012-04-26 2013-11-07 Denso Corp Ignition coil for internal combustion engine
JP2014154771A (en) * 2013-02-12 2014-08-25 Denso Corp Ignition coil for internal combustion engine
US9353722B2 (en) 2013-02-12 2016-05-31 Denso Corporation Ignition coil for internal combustion engine
US10622140B2 (en) 2016-07-21 2020-04-14 Borgwarner Ludwigsburg Gmbh High voltage contact for an ignition coil
DE102017116277B4 (en) 2016-07-21 2023-06-22 Borgwarner Ludwigsburg Gmbh Ignition coil and method of making an ignition coil

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