JP2003239838A - Ignition coil device for internal combustion engine - Google Patents
Ignition coil device for internal combustion engineInfo
- Publication number
- JP2003239838A JP2003239838A JP2002041001A JP2002041001A JP2003239838A JP 2003239838 A JP2003239838 A JP 2003239838A JP 2002041001 A JP2002041001 A JP 2002041001A JP 2002041001 A JP2002041001 A JP 2002041001A JP 2003239838 A JP2003239838 A JP 2003239838A
- Authority
- JP
- Japan
- Prior art keywords
- protector
- internal combustion
- combustion engine
- coil
- adapter
- 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.)
- Pending
Links
Landscapes
- Ignition Installations For Internal Combustion Engines (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、自動車等の内燃機
関の点火プラグに高電圧を供給し、火花放電を行う為の
内燃機関用点火コイル装置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ignition coil device for an internal combustion engine for supplying a high voltage to an ignition plug of an internal combustion engine of an automobile or the like to perform spark discharge.
【０００２】[0002]
【従来の技術】一般に、内燃機関用点火コイル装置は、
自動車等のエンジンルーム内に取付けられる場合が多
く、他のエンジン部品等から要求される寸法的制限が厳
しく、小型化が進んでいる。従来の内燃機関用点火コイ
ル装置は、例えば図３に示すような構成となっていた。
図３は、従来の内燃機関用点火コイル装置の縦断面図で
ある。2. Description of the Related Art Generally, an ignition coil device for an internal combustion engine is
In many cases, it is mounted in the engine room of an automobile or the like, and dimensional restrictions required by other engine parts and the like are severe, and miniaturization is progressing. A conventional ignition coil device for an internal combustion engine has a structure as shown in FIG. 3, for example.
FIG. 3 is a vertical cross-sectional view of a conventional ignition coil device for an internal combustion engine.
【０００３】ここで、閉磁路を形成するセンタ鉄心１と
その周囲に配置されたサイド鉄心２及びセンタ鉄心１の
外周に巻回された一次コイル３と、この一次コイル３の
外周に巻回された二次コイル４を有している。二次コイ
ル４に発生した高電圧は、高圧端子５から点火プラグに
供給される。また、センタ鉄心１、サイド鉄心２、一次
コイル３、二次コイル４、高圧端子５はケース７に収納
されており、エポキシ樹脂等の絶縁性を有した熱硬化性
樹脂８が充填されている。Here, a center iron core 1 forming a closed magnetic circuit, a side iron core 2 arranged around the center iron core 1, a primary coil 3 wound around the outer circumference of the center iron core 1, and a primary coil 3 wound around the outer circumference of the primary coil 3. It has a secondary coil 4. The high voltage generated in the secondary coil 4 is supplied from the high voltage terminal 5 to the spark plug. Further, the center iron core 1, the side iron core 2, the primary coil 3, the secondary coil 4, and the high voltage terminal 5 are housed in a case 7, and filled with an insulating thermosetting resin 8 such as an epoxy resin. .
【０００４】アダプター９内には、スプリング６が収容
されると共に、ラバー１０によってケース７と接続され
ている。また、アダプター９の下端には、ブーツ１１が
嵌合されている。ブーツ１１は、点火プラグにスプリン
グ６を装着する役割を果たしている。アダプター９の外
周には、空隙を有してプラグチューブ１２が配置されて
おり、エンジンのプラグホール内に挿着されている。一
般に、アダプター９、ラバー１０、ブーツ１１の３部品
より構成される部位をプロテクタと称する。A spring 6 is housed in the adapter 9 and is connected to the case 7 by a rubber 10. A boot 11 is fitted to the lower end of the adapter 9. The boot 11 plays a role of mounting the spring 6 on the spark plug. A plug tube 12 is arranged around the outer periphery of the adapter 9 with a gap, and is inserted into a plug hole of the engine. Generally, a part composed of three parts of the adapter 9, the rubber 10 and the boot 11 is called a protector.
【０００５】以上のように構成された内燃機関用点火コ
イル装置は、例えば自動車のエンジンに取り付けられて
おり、点火プラグに火花放電を発生させる。The ignition coil device for an internal combustion engine configured as described above is attached to, for example, an engine of an automobile, and causes a spark discharge in an ignition plug.
【０００６】[0006]
【発明が解決しようとする課題】しかし、以上のように
構成された従来の内燃機関用点火コイル装置において
は、高電圧を点火プラグに供給する際にプロテクタ部と
プラグチューブ間にコロナ放電が発生し、プロテクタ部
にコロナ放電による劣化を引き起こしていた。特に、エ
ンジンのプラグホール内に配置されたプラグチューブと
アダプター間に発生するコロナ放電によるコロナ劣化が
最も激しく、このコロナ放電による劣化を低減する策が
求められている。However, in the conventional ignition coil device for an internal combustion engine configured as described above, corona discharge occurs between the protector portion and the plug tube when a high voltage is supplied to the spark plug. However, the protector was deteriorated by corona discharge. In particular, corona deterioration caused by corona discharge generated between the plug tube arranged in the plug hole of the engine and the adapter is most severe, and a measure for reducing the deterioration due to this corona discharge is required.
【０００７】本発明は上記実情に鑑み提案されたもの
で、アダプターの形状を一部変更することにより、アダ
プターとプラグチューブ間に介在する空気層の電界強度
を低減し、コロナ放電の発生を抑制することのできる内
燃機用点火コイル装置を提供することを目的とする。The present invention has been proposed in view of the above circumstances, and by partially changing the shape of the adapter, the electric field strength of the air layer interposed between the adapter and the plug tube is reduced and the occurrence of corona discharge is suppressed. It is an object of the present invention to provide an ignition coil device for an internal combustion engine that can do the above.
【０００８】[0008]
【課題を解決するための手段】上記目的を達成するため
に、請求項１に記載の発明は、少なくとも一次コイル及
び二次コイルと、前記一次コイル及び二次コイルを磁気
的に結合させる前記一次コイルの内周を通るセンタ鉄心
及び前記二次コイルの外周を通るサイド鉄心を有し、前
記二次コイルに発生した高電圧をラバー、アダプター、
ブーツの３部品より構成されるプロテクタ内のスプリン
グを介して点火プラグへ伝達する内燃機関用点火コイル
装置において、前記アダプターの外形寸法を制約するこ
とにより、高電圧発生時にアース体とプロテクタ間に発
生するコロナ放電を抑え、前記プロテクタのコロナ放電
による劣化を低減することを特徴とする。In order to achieve the above object, the invention according to claim 1 provides at least a primary coil and a secondary coil, and the primary coil which magnetically couples the primary coil and the secondary coil. Having a center iron core passing through the inner circumference of the coil and a side iron core passing through the outer circumference of the secondary coil, a high voltage generated in the secondary coil is rubber, an adapter,
In an ignition coil device for an internal combustion engine, which transmits to an ignition plug through a spring in a protector composed of three parts of a boot, by restricting the outer dimensions of the adapter, a high voltage is generated between a grounding body and the protector. It is characterized in that the corona discharge that occurs is suppressed and deterioration of the protector due to the corona discharge is reduced.
【０００９】また、請求項２に記載の発明は、上記した
請求項１に記載の発明の構成に加えて、前記アダプター
の前記ラバーとの接続部分の外径変化を小さくしたこと
を特徴とする。Further, the invention described in claim 2 is characterized in that, in addition to the structure of the invention described in claim 1, the change in the outer diameter of the connecting portion of the adapter with the rubber is reduced. .
【００１０】[0010]
【発明の実施の形態】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、本発明に係
る内燃機関用点火コイル装置の縦断面図、図２は本発明
の内燃機関用点火コイル装置の要部拡大断面図である。
ここで、図３に従来例として示した点火コイル装置と同
一又は相当部分には、同一符号を付して説明を省略す
る。BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described in detail below with reference to the drawings showing one embodiment. 1 is a longitudinal sectional view of an ignition coil device for an internal combustion engine according to the present invention, and FIG. 2 is an enlarged sectional view of a main part of the ignition coil device for an internal combustion engine of the present invention.
Here, the same or corresponding parts as those of the ignition coil device shown as the conventional example in FIG.
【００１１】内燃機関用点火コイル装置２０は、一次コ
イル３及び二次コイル４を有しており、この２つのコイ
ルを磁気的に結合させる一次コイル３の内周を通るセン
タ鉄心１及び二次コイル４の外周を通るサイド鉄心２を
有し、二次コイル４で発生する高電圧をアダプター２
１、ラバー１０、ブーツ１１の３部品より構成されるプ
ロテクタ内のスプリング６を介して点火プラグに伝達す
るものであって、このアダプター２１のラバー１０との
接続部分の外形寸法を制約する。The ignition coil device 20 for an internal combustion engine has a primary coil 3 and a secondary coil 4, and a center iron core 1 and a secondary coil that pass through the inner circumference of the primary coil 3 that magnetically couples these two coils. It has a side iron core 2 that passes through the outer circumference of the coil 4, and the adapter 2 applies the high voltage generated in the secondary coil 4.
1, the rubber 10, and the boot 11 are transmitted to the spark plug through the spring 6 in the protector, and the external dimensions of the connecting portion of the adapter 21 with the rubber 10 are restricted.
【００１２】本発明では、図３から明らかなようにアダ
プター２１の従来存在した斜線部分２１ａを削除して、
外径寸法の最大値を小さく形成したものである。ここ
で、空気層の厚みをｄ１、アダプター材の厚みをｄ２、
空気の誘電率をε１、アダプター材の誘電率をε２、二
次発生電圧をＶ２、空気の電界強度をＥ１、（ｄ１＋ｄ
２＝Const.）（ε１＜ε２）とすると、
Ｅ１＝ε１・ε２／（ε１・ｄ２＋ε２・ｄ１）
＝Ｖ２／（（ε１／ε２）・ｄ２＋ｄ１） （１）
が成り立ち、空気層の厚みｄ１が大きくなるとき、空気
の電界強度Ｅ１が小さくなる事が判る。In the present invention, as is apparent from FIG. 3, the diagonally shaded portion 21a which has been present in the adapter 21 is deleted,
The maximum outer diameter is formed to be small. Here, the thickness of the air layer is d1, the thickness of the adapter material is d2,
The permittivity of air is ε1, the permittivity of the adapter material is ε2, the secondary generated voltage is V2, the electric field strength of air is E1, (d1 + d
2 = Const.) (Ε1 <ε2), E1 = ε1 · ε2 / (ε1 · d2 + ε2 · d1) = V2 / ((ε1 / ε2) · d2 + d1) (1) holds and the thickness d1 of the air layer is It can be seen that the electric field strength E1 of air decreases as the value increases.
【００１３】以上のように、プロテクタとプラグチュー
ブ間に存在する空気層の電界強度が低下し、コロナ放電
の発生を抑えることができる。As described above, the electric field strength of the air layer existing between the protector and the plug tube is lowered, and the occurrence of corona discharge can be suppressed.
【００１４】[0014]
【発明の効果】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 the present invention has the above-mentioned structure,
The effects described below can be achieved.
【００１５】請求項１に記載の発明では、少なくとも一
次コイル及び二次コイルと、前記一次コイル及び二次コ
イルを磁気的に結合させる前記一次コイルの内周を通る
センタ鉄心及び前記二次コイルの外周を通るサイド鉄心
を有し、前記二次コイルに発生した高電圧をラバー、ア
ダプター、ブーツの３部品より構成されるプロテクタ内
のスプリングを介して点火プラグへ伝達する内燃機関用
点火コイル装置において、前記アダプターの外形寸法を
制約することにより、高電圧発生時にアース体とプロテ
クタ間に発生するコロナ放電を抑え、前記プロテクタの
コロナ放電による劣化を低減するので、プロテクタの寿
命を大幅に延長することができる。According to the first aspect of the present invention, at least the primary coil and the secondary coil, the center iron core passing through the inner circumference of the primary coil for magnetically coupling the primary coil and the secondary coil, and the secondary coil are provided. In an ignition coil device for an internal combustion engine, which has a side iron core passing through an outer periphery, and which transmits a high voltage generated in the secondary coil to an ignition plug through a spring in a protector composed of three parts of a rubber, an adapter and a boot. By limiting the external dimensions of the adapter, the corona discharge that occurs between the grounding body and the protector when high voltage is generated is suppressed, and the deterioration of the protector due to corona discharge is reduced, so the life of the protector is greatly extended. You can
【００１６】また、請求項２に記載の発明では、上記し
た請求項１に記載の発明の構成に加えて、前記アダプタ
ーの前記ラバーとの接続部分の外径変化を小さくしたの
で、アダプターと前記ラバーとの接続部分に発生するコ
ロナ放電を抑えることができプロテクタの寿命を大幅に
延長することができる。Further, in the invention described in claim 2, in addition to the structure of the invention described in claim 1, the change in the outer diameter of the connecting portion of the adapter with the rubber is reduced, so that the adapter and the Corona discharge generated at the connection with the rubber can be suppressed and the life of the protector can be greatly extended.
【図１】図１は、本発明に係る内燃機関用点火コイル装
置の縦断面図である。FIG. 1 is a longitudinal sectional view of an ignition coil device for an internal combustion engine according to the present invention.
【図２】図２は、本発明の内燃機関用点火コイル装置の
要部拡大断面図である。FIG. 2 is an enlarged sectional view of an essential part of an ignition coil device for an internal combustion engine according to the present invention.
【図３】図３は、従来の内燃機関用点火コイル装置の縦
断面図である。FIG. 3 is a vertical sectional view of a conventional ignition coil device for an internal combustion engine.
１ センタ鉄心 ２ サイド鉄心 ３ 一次コイル ４ 二次コイル ５ 高圧端子 ６ スプリング ７ ケース ８ 熱硬化樹脂 ９、２１ アダプター １０ ラバー １１ ブーツ １２ プラグチューブ ２０ 内燃機関用点火コイル装置 1 Center iron core 2 side iron core 3 primary coil 4 secondary coil 5 high voltage terminals 6 spring 7 cases 8 Thermosetting resin 9,21 adapter 10 rubber 11 boots 12 plug tube 20 Ignition coil device for internal combustion engine
Claims (2)
と、前記一次コイル及び二次コイルを磁気的に結合させ
る前記一次コイルの内周を通るセンタ鉄心及び前記二次
コイルの外周を通るサイド鉄心を有し、前記二次コイル
に発生した高電圧をラバー、アダプター、ブーツの３部
品より構成されるプロテクタ内のスプリングを介して点
火プラグへ伝達する内燃機関用点火コイル装置におい
て、前記アダプターの外形寸法を制約することにより、
高電圧発生時にアース体とプロテクタ間に発生するコロ
ナ放電を抑え、前記プロテクタのコロナ放電による劣化
を低減することを特徴とする内燃機関用点火コイル装
置。1. At least a primary coil and a secondary coil, a center iron core passing through an inner circumference of the primary coil for magnetically coupling the primary coil and the secondary coil, and a side iron core passing through an outer circumference of the secondary coil are provided. In the ignition coil device for an internal combustion engine, which transmits a high voltage generated in the secondary coil to a spark plug through a spring in a protector composed of three parts of rubber, an adapter and a boot, the external dimensions of the adapter are By constraining
An ignition coil device for an internal combustion engine, which suppresses corona discharge generated between a grounding body and a protector when a high voltage is generated and reduces deterioration of the protector due to corona discharge.
分の外径変化を小さくし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装置。2. The ignition coil device for an internal combustion engine according to claim 1, wherein a change in outer diameter of a connecting portion of the adapter with the rubber is reduced.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002041001A JP2003239838A (en) | 2002-02-19 | 2002-02-19 | Ignition coil device for internal combustion engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002041001A JP2003239838A (en) | 2002-02-19 | 2002-02-19 | Ignition coil device for internal combustion engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2003239838A true JP2003239838A (en) | 2003-08-27 |
Family
ID=27781520
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2002041001A Pending JP2003239838A (en) | 2002-02-19 | 2002-02-19 | Ignition coil device for internal combustion engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2003239838A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006260796A (en) * | 2005-03-15 | 2006-09-28 | Hanshin Electric Co Ltd | Ignition coil for internal combustion engine |
| JP2016092218A (en) * | 2014-11-05 | 2016-05-23 | 株式会社デンソー | Ignition coil for internal combustion engine, and installation structure for the same |
-
2002
- 2002-02-19 JP JP2002041001A patent/JP2003239838A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006260796A (en) * | 2005-03-15 | 2006-09-28 | Hanshin Electric Co Ltd | Ignition coil for internal combustion engine |
| JP2016092218A (en) * | 2014-11-05 | 2016-05-23 | 株式会社デンソー | Ignition coil for internal combustion engine, and installation structure for the same |
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