JPS6050906A - Ignition coil for internal combustion engine - Google Patents
Ignition coil for internal combustion engineInfo
- Publication number
- JPS6050906A JPS6050906A JP58159383A JP15938383A JPS6050906A JP S6050906 A JPS6050906 A JP S6050906A JP 58159383 A JP58159383 A JP 58159383A JP 15938383 A JP15938383 A JP 15938383A JP S6050906 A JPS6050906 A JP S6050906A
- Authority
- JP
- Japan
- Prior art keywords
- coil
- winding
- bobbin
- primary
- grooves
- 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
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
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Ignition Installations For Internal Combustion Engines (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は内燃機関用点火コイルの改良構造に関するもの
である。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an improved structure of an ignition coil for an internal combustion engine.
二輪車等に使用される点火コイルは近年、コンデンサに
充電した電圧をサイリスクにより急激に１次コイルに放
電させ２次コイルに高圧を発生させるコンデンサ放電点
火方式が多くなっている。In recent years, the ignition coils used in motorcycles and the like have increasingly adopted a capacitor discharge ignition system in which a voltage charged in a capacitor is rapidly discharged to a primary coil using a cyrisk to generate high voltage in a secondary coil.
この種の点火方式は火花のアーク持続時間が短かくガソ
リンへの着火性が悪いので、アーク持続時間を長く必要
とするものは実開昭５８−４０８２３号公報に示す如く
、１次コイルと２次コイルとを直列的に配置し、両コイ
ル間の結合係数を下げてアーク持続時間を長くするよう
考慮されている。This type of ignition system has a short spark arc duration and poor ignition of gasoline, so those that require a long arc duration have a primary coil and two It is considered that the next coil is placed in series to lower the coupling coefficient between both coils and to lengthen the arc duration.
しかし、上述した従来のものの様に直列配置にすると各
コイル間の結合係数が０．７以下と小さくなりすぎて、
二次電圧が下がってしまうので、閉磁路コアを特別に設
けて、二次電圧低下分を補なっていた。そのために、コ
の字状の閉磁路コアが余分に必要であると共に、体格的
にも閉磁路コア分だけ大きくなり不経済であった。また
、高圧側巻線と閉磁路コアとの間隔が近づき、耐圧不良
を起こすこともあるという欠点があった。However, if the coils are arranged in series like the conventional one mentioned above, the coupling coefficient between each coil becomes too small, less than 0.7.
Since the secondary voltage would drop, a special closed magnetic circuit core was provided to compensate for the drop in secondary voltage. For this reason, an extra U-shaped closed magnetic circuit core is required, and the size is also increased by the closed magnetic circuit core, which is uneconomical. Another drawback is that the distance between the high-voltage side winding and the closed magnetic circuit core becomes close, which may lead to breakdown voltage failure.
本発明は上記欠点を解消するため、２次コイルの内側で
かつ２次コイルの巻幅の半分ぐらいの位置に一部コイル
を配置することにより、結合係数が０．７〜０．８５ぐ
らいの間で自由に設定でき、従って閉磁路コアを用いる
ことなく、アーク時間が長くかつ２次電圧が充分得られ
ることを目的とする。In order to solve the above-mentioned drawbacks, the present invention provides a coupling coefficient of about 0.7 to 0.85 by arranging a part of the coil inside the secondary coil and at a position about half the winding width of the secondary coil. The object is to be able to freely set the arc time between the two, and therefore to obtain a long arc time and a sufficient secondary voltage without using a closed magnetic circuit core.
以下本発明を図に示す実施例について説明する。 The present invention will be described below with reference to embodiments shown in the drawings.
第１図において、■は合成樹脂製の１次ボビンで２次ボ
ビン長さの約半分の軸長である。２は１次コイルで前記
１次ボビン１に直径０．３〜０．６ｆｉの線が４０〜６
０回２層に巻いである。３は合成樹脂製の２次ボビンで
、その外周は複数の巻溝に分割され、そのうち巻始め側
の４つのを溝は１次コイル２の外周に形成してあり、巻
終り側の３つの巻溝は１次コイル２の軸方向に形成して
あり、巻始め側の４つの巻溝の内径肉厚ｔ１は巻終り側
の３つの巻溝の内径肉厚Ｌ２より薄くなっている。In FIG. 1, ■ is a primary bobbin made of synthetic resin and has an axial length that is approximately half the length of the secondary bobbin. 2 is a primary coil, and there are 40 to 6 wires with a diameter of 0.3 to 0.6 fi on the primary bobbin 1.
It is wound in two layers 0 times. 3 is a secondary bobbin made of synthetic resin, the outer periphery of which is divided into a plurality of winding grooves, of which the four grooves on the start side are formed on the outer periphery of the primary coil 2, and the three grooves on the end side The winding grooves are formed in the axial direction of the primary coil 2, and the inner diameter wall thickness t1 of the four winding grooves on the winding start side is thinner than the inner diameter wall thickness L2 of the three winding grooves on the winding end side.
４は２次コイルで、２次ボビン３の各巻溝に図中左側か
ら順次巻線され、巻終りは高圧ターミナル６に接続され
ている。５はコアでフェライトよりなり、２次巻線４の
巻始め側端面からの突出寸法１１の方が巻終り側端面の
突出用法１２より大きくなっている。Reference numeral 4 denotes a secondary coil, which is wound sequentially in each winding groove of the secondary bobbin 3 from the left side in the figure, and the end of the winding is connected to the high voltage terminal 6. A core 5 is made of ferrite, and the protrusion dimension 11 from the winding start side end face of the secondary winding 4 is larger than the protrusion size 12 from the winding end side end face.
６は高圧ターミナルでその右ネジ部は図示しない高圧コ
ードに接続される。７は合成樹脂製のケースで高圧コー
ド挿入部７１も一体成形されている。８はケース７内に
注入した注型樹脂で、コイルの絶縁及び、全体の固定を
行なう。なお、２次ボビン３の巻終り側の巻溝は巻幅、
溝深さ共に小さくなっており、そこに巻かれる２次コイ
ル４の巻数も少なくなっている。6 is a high voltage terminal whose right threaded portion is connected to a high voltage cord (not shown). 7 is a case made of synthetic resin, and a high voltage cord insertion portion 71 is also integrally molded therein. 8 is a casting resin injected into the case 7 to insulate the coil and fix the entire body. Note that the winding groove on the winding end side of the secondary bobbin 3 has a winding width of
Both the groove depth is smaller, and the number of turns of the secondary coil 4 wound therein is also smaller.
９は１次ターミナルで、１次コイル２の巻始めを接続す
るターミナル、１次コイル２の巻終り及び２次コイル４
の巻始めを接続するターミナルが各々設けである。9 is a primary terminal, which connects the beginning of the primary coil 2, the end of the primary coil 2, and the secondary coil 4.
Each terminal is provided with a terminal to connect the beginning of the winding.
上記構成において、１次コイル２が、２次コイル４の巻
始め側から半分まで巻かれており、従来の直列巻に対し
結合係数を高くすることができ、（従来の０．５〜０．
６５から０．７〜０．８５にアップし）、２次電圧を高
くすることができる。In the above configuration, the primary coil 2 is wound half way from the winding start side of the secondary coil 4, and the coupling coefficient can be increased compared to the conventional series winding (0.5 to 0.
65 to 0.7 to 0.85), making it possible to increase the secondary voltage.
２次ボビン３の内径肉厚をｔｌ＜ｔ２とし、巻終り側が
厚くしであるので、耐電圧が向上し、かつ、巻始め側ｔ
１が薄いので、巻始め側の４つの巻溝の巻線化が多くと
れる。Since the inner diameter wall thickness of the secondary bobbin 3 is tl<t2, and the winding end side is thicker, the withstand voltage is improved, and the winding start side t is thicker.
1 is thin, so the four winding grooves on the winding start side can be wound more often.
また、コア５の突出長さを＃、＞＃２としたので、１次
コイル２をコア５軸長の中心に近くすることがてき、１
次コイル２と２次コイル４との結合係数をアップするこ
とができる。In addition, since the protrusion length of the core 5 is set to #, >#2, the primary coil 2 can be placed close to the center of the axial length of the core 5, and 1
The coupling coefficient between the secondary coil 2 and the secondary coil 4 can be increased.
第２図は結合係数に対する２次電圧、アーク時間の変化
を示した特性図であり、本発明によれば結合係数を０．
７〜０．８５に選定することができ最適な設計をするこ
とができる。FIG. 2 is a characteristic diagram showing changes in secondary voltage and arc time with respect to the coupling coefficient, and according to the present invention, the coupling coefficient is reduced to 0.
7 to 0.85, and an optimal design can be made.
以上述べたように本発明によれば、２次コイルの低圧側
の一部を１次コイルの外周に配置し、２次コイルの残部
を１次コイルの軸方向に配置したから、１次、２次コイ
ルの結合係数を０．７〜０．８５程度に自由に設定する
ことができ、従って、閉磁路コイルを用いることなく、
アーク時間が長くかつ充分な２次電圧を得ることができ
るとし）う優れた効果がある。As described above, according to the present invention, a part of the low voltage side of the secondary coil is arranged around the outer periphery of the primary coil, and the remaining part of the secondary coil is arranged in the axial direction of the primary coil. The coupling coefficient of the secondary coil can be freely set to about 0.7 to 0.85, so there is no need to use a closed magnetic circuit coil.
This has an excellent effect in that the arc time is long and sufficient secondary voltage can be obtained.
第１図は本発明コイルの一実施例を示す縦断面図、第２
図は結合係数に対する２次電圧、アーク時間特性図であ
る。
２・・・１次コイル、３・・・２次ボビン、４・・・２
次コイル、５・・・コア。
代理人弁理士 岡 部 隆Fig. 1 is a vertical sectional view showing one embodiment of the coil of the present invention, Fig. 2
The figure is a diagram showing secondary voltage and arc time characteristics with respect to coupling coefficient. 2... Primary coil, 3... Secondary bobbin, 4... 2
Next coil, 5...core. Representative Patent Attorney Takashi Okabe
Claims (3)
た内燃機関用点火コイルにおいて、前記２次コイルの低
圧側の一部を前記１次コイルの外周に配置し、前記２次
コイルの残部を前記１次コイルの軸方向に配置してなる
内燃機関用点火コイル。(1) In an ignition coil for an internal combustion engine in which a primary coil and a secondary coil are wound around the outer periphery of a core, a part of the low voltage side of the secondary coil is arranged on the outer periphery of the primary coil, and An ignition coil for an internal combustion engine, in which the remainder of the coil is arranged in the axial direction of the primary coil.
１次コイルの外周部分より軸方向部分の方を厚くしてな
る特許請求の範囲第１項記載の内燃機関用点火コイル。(2) The thickness of the secondary bobbin around which the secondary coil is wound is
The ignition coil for an internal combustion engine according to claim 1, wherein the primary coil is thicker in the axial direction than in the outer circumference.
を、高圧側より低圧側の方を大きくした特許請求の範囲
第１項記載の内燃機関用点火コイル。(3) The ignition coil for an internal combustion engine according to claim 1, wherein the protruding length of the core from both end faces of the secondary coil is larger on the low-pressure side than on the high-pressure side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58159383A JPS6050906A (en) | 1983-08-30 | 1983-08-30 | Ignition coil for internal combustion engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58159383A JPS6050906A (en) | 1983-08-30 | 1983-08-30 | Ignition coil for internal combustion engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6050906A true JPS6050906A (en) | 1985-03-22 |
Family
ID=15692598
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58159383A Pending JPS6050906A (en) | 1983-08-30 | 1983-08-30 | Ignition coil for internal combustion engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6050906A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6134912A (en) * | 1984-07-25 | 1986-02-19 | Nippon Denso Co Ltd | Ignition coil for internal-combustion engine |
| JP2008277460A (en) * | 2007-04-27 | 2008-11-13 | Denso Corp | Ignition coil |
| JP2015180822A (en) * | 2006-05-18 | 2015-10-15 | ノース−ウエスト ユニヴァーシティ | Ignition system |
| JP2017022211A (en) * | 2015-07-08 | 2017-01-26 | 株式会社日本自動車部品総合研究所 | Discharge device |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55101769A (en) * | 1979-01-26 | 1980-08-04 | Automob Antipollut & Saf Res Center | Plural sparks igniting device |
| JPS5739041A (en) * | 1980-08-20 | 1982-03-04 | Sumitomo Metal Ind Ltd | Deep drawing method of bonded metallic plate |
-
1983
- 1983-08-30 JP JP58159383A patent/JPS6050906A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55101769A (en) * | 1979-01-26 | 1980-08-04 | Automob Antipollut & Saf Res Center | Plural sparks igniting device |
| JPS5739041A (en) * | 1980-08-20 | 1982-03-04 | Sumitomo Metal Ind Ltd | Deep drawing method of bonded metallic plate |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6134912A (en) * | 1984-07-25 | 1986-02-19 | Nippon Denso Co Ltd | Ignition coil for internal-combustion engine |
| JP2015180822A (en) * | 2006-05-18 | 2015-10-15 | ノース−ウエスト ユニヴァーシティ | Ignition system |
| JP2008277460A (en) * | 2007-04-27 | 2008-11-13 | Denso Corp | Ignition coil |
| JP2017022211A (en) * | 2015-07-08 | 2017-01-26 | 株式会社日本自動車部品総合研究所 | Discharge device |
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