JPH0917662A - Ignition device for internal-combustion engine - Google Patents
Ignition device for internal-combustion engineInfo
- Publication number
- JPH0917662A JPH0917662A JP7165141A JP16514195A JPH0917662A JP H0917662 A JPH0917662 A JP H0917662A JP 7165141 A JP7165141 A JP 7165141A JP 16514195 A JP16514195 A JP 16514195A JP H0917662 A JPH0917662 A JP H0917662A
- Authority
- JP
- Japan
- Prior art keywords
- core
- bobbin
- coil
- ignition device
- primary
- 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
-
- 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
- H01F2038/122—Ignition, e.g. for IC engines with rod-shaped core
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、内熱機関用点火装置に
係り、特にプラグホール内に収納される円筒形の点火装
置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an internal combustion engine ignition device, and more particularly to a cylindrical ignition device housed in a plug hole.
【０００２】[0002]
【従来の技術】従来の内熱機関用点火装置は、特開平2
−92913号のように、円筒形のケース内部に開磁路コア
を収容し、該コアの外に１次コイルと２次コイルを嵌合
して、前記ケース内に絶縁用樹脂を注型し硬化させると
共に、該ケース内の筒壁中にサイドコアを内蔵する開磁
路形点火装置であった。また、ボビンは単なる筒状であ
り、１次ボビンと２次ボビン間は圧入形状としていた。2. Description of the Related Art A conventional internal heat engine ignition device is disclosed in
As in No.92913, an open magnetic circuit core is housed inside a cylindrical case, a primary coil and a secondary coil are fitted outside the core, and an insulating resin is cast into the case. It was an open magnetic circuit type igniter which was hardened and had a side core built into the cylinder wall in the case. Further, the bobbin has a simple cylindrical shape, and the primary bobbin and the secondary bobbin are press-fitted.
【０００３】[0003]
【発明が解決しようとする課題】上記従来技術では、セ
ンタコアもしくは、低圧側コアの上部に可とう性樹脂を
充填し、コアと絶縁用樹脂との間の熱応力によるクラッ
クの防止を図り且つ、１次ボビンと２次ボビン間を圧入
形状とし、直接、コアが絶縁用樹脂に接触する形をさけ
ていたが、この形状では、コイルに絶縁用樹脂を真空で
充填する作業時に該圧入部より、コアの積層部や、ボビ
ン内部に介在している空気が圧入部を通過して、泡とな
り、コイル内部、特に、２次ボビンに巻回している２次
巻線周辺に侵入する。そもそも樹脂の真空注型は、２次
巻線等の高圧部に完全に樹脂を含浸させ、絶縁性を持た
せるのが狙いである。そのため、真空度はシビアに管理
せねばならない。今までのコイルならば構造が比較的簡
単で、絶縁用樹脂も、それ程時間をかけずにコイル内部
に完全に浸透させることができた。しかしながら、円筒
コイルにては、図を見ても明らかな様に、絶縁用樹脂が
回り込む隙間が殆ど薄く、且つ細長い。よって、樹脂の
注型には、最新のコイル構造が要求される。今までのコ
イルでは、コアを絶縁用樹脂中に埋没しない構造が一般
的で、コアに介在する空気の干渉は考慮していなく、仮
りにコアを埋没する構造でも、コアと絶縁用樹脂との間
で、ヒートショック時にクラックが入り、コイルが破損
する等の問題がある。よってコアと絶縁用樹脂とを隔離
する場合に圧入による構造では、真空注型時の圧力差、
約１気圧を保てず、上述のように、圧入部から空気がリ
ークしてしまう。本円筒コイルの構造上、圧入部は、高
圧部（コイル下部）となり、泡の侵入経路が、コイルの
下側から気泡となってじわじわ侵入し、丁度２次巻線周
辺を通る。そのため、絶縁用樹脂中に気泡が残り、絶縁
性が極めて悪化するという問題があった。２次巻線部
は、数十キロボルトの高圧発生部である。In the above prior art, a flexible resin is filled in the upper part of the center core or the low-voltage side core to prevent cracks due to thermal stress between the core and the insulating resin, and The primary bobbin and the secondary bobbin were press-fitted so that the core was not in direct contact with the insulating resin. With this shape, when the coil is filled with the insulating resin by vacuum, the press-fitting portion Air intervening in the laminated portion of the core and the inside of the bobbin passes through the press-fitting portion to form bubbles, and penetrates into the inside of the coil, especially around the secondary winding wound around the secondary bobbin. In the first place, the vacuum casting of resin aims at completely impregnating the high voltage part such as the secondary winding with the resin so as to have the insulating property. Therefore, the degree of vacuum must be strictly controlled. The conventional coil had a relatively simple structure, and the insulating resin could be completely permeated into the coil in less time. However, in the cylindrical coil, as is clear from the figure, the gap around which the insulating resin wraps around is almost thin and elongated. Therefore, the latest coil structure is required for resin casting. Conventional coils generally have a structure in which the core is not buried in the insulating resin, and the interference of air intervening in the core is not considered.Even if the core is buried, the core and insulating resin are not In between, there is a problem that cracks occur at the time of heat shock and the coil is damaged. Therefore, when the core and the insulating resin are separated from each other, in the structure of press fitting, the pressure difference during vacuum casting,
About 1 atm cannot be maintained, and air leaks from the press-fitting portion as described above. Due to the structure of the present cylindrical coil, the press-fitting portion becomes a high-pressure portion (lower portion of the coil), and the bubble intrusion path gradually infiltrates as bubbles from the lower side of the coil and passes just around the secondary winding. Therefore, there is a problem that bubbles remain in the insulating resin and the insulating property is extremely deteriorated. The secondary winding part is a high voltage generating part of several tens of kilovolts.
【０００４】本発明の目的は、コアと絶縁用樹脂間を完
全に隔離させ樹脂中に気泡を残さない構造とすること
で、絶縁耐久性に優れた信頼性の高い円筒形の内燃機関
用点火装置を提供することにある。An object of the present invention is to completely separate the core and the insulating resin so that no bubbles remain in the resin, so that a highly reliable cylindrical ignition for an internal combustion engine having excellent insulation durability. To provide a device.
【０００５】[0005]
【課題を解決するための手段】上記目的を達成するた
め、絶縁用樹脂とコアが直接、接することがない様、１
次ボビンと２次ボビンを完全に接着し且つ、１次ボビン
を袋状に形成し、且つ、コア上部に可とう性樹脂で固
め、且つ、高圧側コアも可とう性樹脂により封止する。
また高圧側コアと２次ボビンとの熱応力緩和のため、ゴ
ム等の弾性部材を入れる構造とすることも有る。In order to achieve the above object, the insulating resin and the core are prevented from directly contacting each other.
The secondary bobbin and the secondary bobbin are completely adhered to each other, the primary bobbin is formed into a bag shape, the upper part of the core is fixed with a flexible resin, and the high pressure side core is also sealed with the flexible resin.
Further, in order to relieve the thermal stress between the high pressure side core and the secondary bobbin, an elastic member such as rubber may be inserted.
【０００６】[0006]
【作用】コアに介在している空気、１次ボビン内部に残
る残存空気，マグネットに介在しているガス等を完全に
封止するので、コイルの下部（高圧側）から気泡が漏れ
だし、高圧部に干渉することがないので、高電圧リーク
等でコイルが破壊することを防止できる。[Function] Since air intervening in the core, residual air remaining inside the primary bobbin, gas intervening in the magnet, etc. are completely sealed, air bubbles leak from the lower part of the coil (high pressure side), Since it does not interfere with the parts, it is possible to prevent the coil from being broken due to high voltage leakage or the like.
【０００７】[0007]
【実施例】以下、本発明の実施例を図面に従って説明す
る。Embodiments of the present invention will be described below with reference to the drawings.
【０００８】図１は本発明の実施例の構成を示す点火装
置の断面図である。FIG. 1 is a sectional view of an ignition device showing the construction of an embodiment of the present invention.
【０００９】１次ボビン１は、ポリブチレンテレフタレ
ート（ＰＢＴ）やポリフェニレンサルファイド（ＰＰ
Ｓ）等の熱可塑性合成樹脂で成形され、１次コイル２が
巻層されている。また、変性ポリフェニレンオキサイド
（変性ＰＰＯ）等の熱可塑性合成樹脂で成形された２次
ボビン３には２次コイル４が巻層されている。１次コイ
ル２は線径０.３〜１.０mm程度のエナメル線を一層あた
り数十回ずつ、数層にわたり合計１００〜３００回程度
積層巻されている。２次コイル４は線径０.０３〜０.１
mm 程度のエナメル線を用いて合計５０００〜２０００
０回程度分割巻されている。ケース５は１次ボビン１と
同じような熱可塑性合成樹脂で成形されており、コネク
タ部２４が一体成形されている。本実施例のような円筒
形点火装置の場合、長さが長くなるため成形上１°以下
のテーパが必要となるため、ケース５の内径部５ｃのみ
テーパが設けられている。センタコア７は１次ボビンの
内側に配置され、珪素鋼板をプレス積層している。サイ
ドコア８は２次コイルの外側且つケース５の外側に配置
され、薄い珪素鋼板を管状に丸めている。ただし、磁束
の１ターンショートを防ぐため、サイドコア８円周上の
少なくとも一箇所は切れ目を設けている。本実施例で
は、サイドコア８は板厚０.３〜０.７mmの珪素鋼板一枚
で構成されているが、二枚以上重ねうず電流損を減らし
て、出力を向上することも可能である。センタコア７と
サイドコア８を磁気的に結合して閉磁路を形成するため
に、２次コイル４の低圧側に低圧側コア１８を、２次コ
イル４の高圧側に高圧側コア９を配置する。本実施例で
は、センタコア７と低圧側コア１８は一体にＴ型にプレ
スされ、袋状に成形された１次ボビン１にセンタコア７
底部にマグネット１０を設置した状態のコアを挿入し、
収容されている。そして、低圧側コア９の上部は可とう
性エポキシ樹脂やゴムなどの弾性部材１２でカバーす
る。これにより、図１，図６に示すように絶縁用エポキ
シ樹脂６などの絶縁用樹脂と、センタコア７，低圧側コ
ア１８とを隔離することができる。また、その後、図１
４，図１５に示すように２次ボビンに挿入し２次ボビン
と１次ボビンを接着剤１２ａにて接着する。高圧側コア
９は２次ボビン３に設けられたポケット部３ａに収容さ
れ、可とう性樹脂を充填する。この時、充填した上から
ＰＢＴやノリル等のふたを接着する時もある。よって、
絶縁用エポキシ樹脂６と隔離されている。高圧側コア９
を収容するポケット部３ａは２次ボビン３だけでなく１
次ボビン１やケース５に設けることも可能である。さら
に、ポケット部３ａのみ別部品としてケース５に圧入あ
るいは接着して固定することもできる。さらに、２次ボ
ビンと一体成形すれば上記のような接着作業が不要にな
り、作業性が向上する。又、前記高圧側コア９は、応力
緩和材として、ゴム５５等を配置（図１１に示す）する
と、耐ヒートショック性をアップすることができる。更
に、図１２に示すように筒状の１次コイルでは、コアを
挿入し２次ボビンに挿入後、１次，２次ボビンを接着さ
せ、高圧側コア９を挿入し可とう性樹脂を充填する方法
もある。閉磁路コアの一部にはコアギャップ１１があ
り、そのコアギャップ１１部には１次コイル２により形
成された磁束と反対方向の磁束を磁路中に発生させるマ
グネット１０を備えている。マグネット１０は磁路中に
反対方向の磁束を発生させることにより、珪素鋼板コア
の磁化曲線の飽和点以下で動作させることができる。例
えば、保持力５ｋＯｅ以上のマグネットを使用すれば、
熱による減磁が少ないため、樹脂ケースとの一体成形も
可能となる。これらのコイル部構成部品はケース５の中
に圧入され、Ｔｇ点が１１５℃〜１３５℃で、かつ熱膨
張係数が、Ｔｇ点以下の温度範囲に於ける平均値として
１０〜５０×１０Ｅ−６／℃の銅ヒートシンクに近い
値、例えば、２５×１０Ｅ−６／℃程度の絶縁用エポキ
シ樹脂６の絶縁層で高電圧を絶縁する。２次コイル４で
発生した高電圧は、点火装置の長さを少しでも低減する
よう長手方向に対して垂直方向に配置された過早着火防
止用高圧ダイオード１７，高圧端子１３，スプリング１
４を介して点火プラグに供給される。点火プラグが挿入
される部分は、シリコンゴム等のゴムブーツ１５で絶縁
する。シリンダヘッドカバーと接する部分にはシール用
のシールゴム１６が設けられている。コイル上部に設置
されるイグナイタユニット２０は、箱型にプレス成形さ
れた銅またはアルミ製の金属製ベース２６に、パワート
ランジスタチップ２１とハイブリッドＩＣ回路２８が内
蔵されており、金属製ベース２６内にはシリコンゲルが
充填されている。そして、イグナイタユニット２０は、
ケース５に設けてあるイグナイタユニット２０，位置決
め突起５３，５２で位置決めされる。金属製ベース２６
には、イグナイタ側端子２２がポリブチレンテレフタレ
ートなどの熱可塑性合成樹脂で一体成形されている端子
台２７がシリコン接着剤で接着されている。イグナイタ
側端子２２は１次コイル端子２３，コネクタ側端子２５
と溶接で電気的に接続される。The primary bobbin 1 is made of polybutylene terephthalate (PBT) or polyphenylene sulfide (PP).
The primary coil 2 is wound and formed of a thermoplastic synthetic resin such as S). A secondary coil 4 is wound on a secondary bobbin 3 formed of a thermoplastic synthetic resin such as modified polyphenylene oxide (modified PPO). In the primary coil 2, an enamel wire having a wire diameter of about 0.3 to 1.0 mm is laminated and wound several dozen times per layer, for a total of 100 to 300 times. The secondary coil 4 has a wire diameter of 0.03 to 0.1.
Total of 5000-2000 using the enamel wire of about mm
It is divided and wound about 0 times. The case 5 is made of the same thermoplastic synthetic resin as the primary bobbin 1, and the connector portion 24 is integrally formed. In the case of the cylindrical ignition device as in this embodiment, since the length is long, a taper of 1 ° or less is required for molding, and therefore only the inner diameter portion 5c of the case 5 is provided with the taper. The center core 7 is arranged inside the primary bobbin and is formed by pressing and laminating silicon steel plates. The side core 8 is arranged outside the secondary coil and outside the case 5, and is formed by rolling a thin silicon steel plate into a tubular shape. However, in order to prevent a one-turn short circuit of the magnetic flux, at least one place on the circumference of the side core 8 is provided with a break. In this embodiment, the side core 8 is composed of one silicon steel plate having a plate thickness of 0.3 to 0.7 mm, but it is also possible to reduce the eddy current loss of two or more plates and improve the output. In order to magnetically couple the center core 7 and the side core 8 to form a closed magnetic circuit, a low voltage side core 18 is arranged on the low voltage side of the secondary coil 4 and a high voltage side core 9 is arranged on the high voltage side of the secondary coil 4. In the present embodiment, the center core 7 and the low pressure side core 18 are integrally pressed into a T shape, and the center core 7 is attached to the primary bobbin 1 formed into a bag shape.
Insert the core with the magnet 10 installed on the bottom,
Is housed. The upper portion of the low voltage side core 9 is covered with an elastic member 12 such as a flexible epoxy resin or rubber. As a result, as shown in FIGS. 1 and 6, the insulating resin such as the insulating epoxy resin 6 and the center core 7 and the low voltage side core 18 can be isolated from each other. Also, after that,
4, As shown in FIG. 15, it is inserted into the secondary bobbin and the secondary bobbin and the primary bobbin are bonded with the adhesive 12a. The high-voltage side core 9 is housed in the pocket portion 3a provided on the secondary bobbin 3 and filled with the flexible resin. At this time, a lid such as PBT or Noryl may be adhered from the top of filling. Therefore,
It is separated from the insulating epoxy resin 6. High voltage side core 9
The pocket portion 3a for accommodating not only the secondary bobbin 3 but also 1
It may be provided on the next bobbin 1 or the case 5. Further, only the pocket portion 3a can be press-fitted or adhered to the case 5 and fixed as a separate component. Further, if integrally molded with the secondary bobbin, the above-described bonding work becomes unnecessary and workability is improved. Further, the high-pressure side core 9 can have improved heat shock resistance by disposing rubber 55 or the like as a stress relaxation material (shown in FIG. 11). Further, in the cylindrical primary coil as shown in FIG. 12, after inserting the core and inserting it into the secondary bobbin, the primary and secondary bobbins are adhered, and the high voltage side core 9 is inserted and filled with the flexible resin. There is also a way to do it. A core gap 11 is provided in a part of the closed magnetic circuit core, and the core gap 11 portion is provided with a magnet 10 for generating a magnetic flux in a direction opposite to the magnetic flux formed by the primary coil 2 in the magnetic path. The magnet 10 can be operated below the saturation point of the magnetization curve of the silicon steel plate core by generating magnetic flux in opposite directions in the magnetic path. For example, if you use a magnet with a holding force of 5 kOe or more,
Since there is little demagnetization due to heat, it is possible to perform integral molding with the resin case. These coil component parts are press-fitted into the case 5 and have a Tg point of 115 ° C. to 135 ° C. and a coefficient of thermal expansion of 10 to 50 × 10E-6 as an average value in a temperature range below the Tg point. A high voltage is insulated by an insulating layer of insulating epoxy resin 6 having a value close to that of a copper heat sink of / ° C, for example, about 25 × 10E-6 / ° C. The high voltage generated in the secondary coil 4 is arranged in a direction perpendicular to the longitudinal direction so as to reduce the length of the ignition device as much as possible.
4 to the spark plug. The portion where the spark plug is inserted is insulated by a rubber boot 15 such as silicon rubber. A seal rubber 16 for sealing is provided at a portion in contact with the cylinder head cover. The igniter unit 20 installed on the upper part of the coil has a power transistor chip 21 and a hybrid IC circuit 28 built in a metal base 26 made of copper or aluminum pressed into a box shape. Is filled with silicone gel. And the igniter unit 20 is
Positioning is performed by the igniter unit 20 and the positioning protrusions 53, 52 provided on the case 5. Metal base 26
A terminal block 27, in which the igniter-side terminal 22 is integrally formed of a thermoplastic synthetic resin such as polybutylene terephthalate, is adhered to the terminal by silicon adhesive. The igniter side terminal 22 is a primary coil terminal 23 and a connector side terminal 25.
And electrically connected by welding.
【００１０】上記で説明したように、袋状構造とするこ
とで、空気が泡となって、１次，２次ボビンの下部から
発生することを防止できる。As described above, with the bag-like structure, it is possible to prevent air from forming bubbles and generating from the lower portions of the primary and secondary bobbins.
【００１１】次に、図２の主要部品展開図を用い、本発
明の構造について詳しく説明する。センタコア７は、図
３に示すように珪素鋼板のプレス幅を変えてプレス積層
したブロックを組合せ多角形形状とするか、図４のよう
に珪素鋼板のプレス工程において幅を順次増減させて積
層し円筒形状に近づけ断面積を増やすよう工夫してあ
る。図３，図４は、センタコア７と低圧側コア１８が別
体の場合である。これとは別に図５に示すよう、センタ
コア７と低圧側コア１８を一体にプレス積層して、本実
施例のようにＴ型コアを形成することもできる。以上の
ようにＴ型に形成されたセンタコア７，低圧側コア１８
に、コアギャップ１１に配置されるマグネット１０を取
付け、１次ボビン１の内側に収容する。１次ボビン１に
はＴ型コアが固定されて収容されるようにＴ型のポケッ
ト部１ａが形成されている。低圧側コア１８を収容した
ときのサイドコア８とのギャップはケース５の肉厚と１
次ボビン１の肉厚があるため１.５mm〜２.５mm程度にな
る。低圧側コア１８の上部には熱応力吸収用の可とう性
エポキシ樹脂１２を注型するため、Ｔ型ポケット部１ａ
の高さは、コアのＴ部高さよりも高くなるように構成さ
れている。また、１次ボビン１は、図１４，図１５等で
示されるように２次ボビン３と接着剤１２ａ、例えばシ
リコン系，エポキシ系の接着剤により接着する。２次ボ
ビン３は高圧側に高圧側コア９を収容するポケット３ａ
が設けられ、図１，図１１，図１２，図１４に示すよう
に固定される。Next, the structure of the present invention will be described in detail with reference to FIG. As shown in FIG. 3, the center core 7 has a combined polygonal shape formed by changing the press width of the silicon steel plates and press-laminating the blocks, or as shown in FIG. It is designed to be close to a cylindrical shape and increase the cross-sectional area. 3 and 4 show the case where the center core 7 and the low-voltage side core 18 are separate bodies. Alternatively, as shown in FIG. 5, the center core 7 and the low-pressure side core 18 may be integrally press-laminated to form a T-shaped core as in this embodiment. The center core 7 and the low-voltage side core 18 formed in the T-shape as described above
Then, the magnet 10 arranged in the core gap 11 is attached and accommodated inside the primary bobbin 1. The primary bobbin 1 is formed with a T-shaped pocket portion 1a so that the T-shaped core is fixedly housed therein. When the low-voltage side core 18 is housed, the gap between the side core 8 and the side core 8 is 1
The thickness of the next bobbin 1 is about 1.5 mm to 2.5 mm. Since the flexible epoxy resin 12 for absorbing thermal stress is cast on the upper portion of the low-voltage side core 18, the T-shaped pocket portion 1a is formed.
Is higher than the height of the T portion of the core. Further, the primary bobbin 1 is bonded to the secondary bobbin 3 with an adhesive 12a, for example, a silicone-based or epoxy-based adhesive as shown in FIGS. The secondary bobbin 3 has a pocket 3a for accommodating the high pressure side core 9 on the high pressure side.
Is provided and fixed as shown in FIGS. 1, 11, 12, and 14.
【００１２】以上のように、図２に示す主要構成部品、
センタコア７，低圧側コア１８，１次ボビン１，２次ボ
ビン３をケース５に組付け後、１次ボビン１のＴ型ポケ
ット部１ａに可とう性エポキシ樹脂１２を注型し、低圧
側コア１８をカバーする。そして、図７に示すようにイ
グナイタユニット２０をケース５に設けられている位置
決め突起５２，５３で横方向の位置を固定し、縦方向は
ケース５に乗せることで位置決めする。コネクタ側端子
２５ａは１次コイル端子２３ｂと接続され、その他のコ
ネクタ側端子２５ｂ，２５ｃは、それぞれイグナイタ側
端子２２ｃ，２２ｂに接続される。さらに、イグナイタ
側端子２２ａと１次コイル端子２３ａが接続される。１
次コイル端子２３ａ，２３ｂは、１次ボビン１から接続
する関係上、イグナイタユニット２０の両サイドに配置
される。次に、図８を用いて１次コイルとの接続方法を
詳しく説明する。１次ボビン１には、１次コイル端子２
３ａを固定するポケット１ｂが設けられており、そのポ
ケット１ｂに１次コイル端子２３ａが圧入固定されてい
る。１次コイル端子２３ａの１次コイル巻きつけ部２３
ａ１は１次ボビン１から垂直方向にＬ型に曲げられてお
り、１次コイル２の端末が巻きつけやすいように構成さ
れている。また、イグナイタ側端子22ａと溶接される側
には、溶接時の応力を緩和・吸収し、１次コイル巻きつ
け部23a1に応力が伝わるのを防止する目的で一部分に湾
曲部２３ａ２を設けている。イグナイタ側端子２２ａ，
２２ｂ，２２ｃ、およびコネクタ側端子２５ａ，２５
ｂ，２５ｃはＬ型に加工され、また、溶接箇所が横一列
になるよう配置されているため溶接作業が容易となる。
さらに、溶接作業の場合は、スパッタがコイル巻線部に
飛散しないよう構成する必要があり、本実施例では、図
７に示すように、イグナイタユニット２０でコイル巻線
部をカバーするよう配置する。ただし、絶縁用エポキシ
樹脂６の注型性や１次コイル２からの配線等に悪影響を
及ぼさない範囲に配置する必要がある。さらに、スパッ
タの飛散する範囲をコイル巻線部から遠ざける意味か
ら、各端子の溶接位置は、ケース５のコイル収容部５ｃ
から１mm以上とする。また、溶接する端子の先端は位置
は、ケース５の端面から２〜６mm内側の位置にくるよう
に構成し、絶縁用エポキシ樹脂６で必ず覆われるように
し、防水信頼性を確保している。As described above, the main components shown in FIG.
After assembling the center core 7, the low pressure side core 18, the primary bobbin 1 and the secondary bobbin 3 to the case 5, the flexible epoxy resin 12 is cast into the T-shaped pocket 1a of the primary bobbin 1 to form the low pressure side core. Cover 18. Then, as shown in FIG. 7, the igniter unit 20 is positioned by laterally fixing the igniter unit 20 by the positioning projections 52 and 53 provided on the case 5 and vertically mounting the igniter unit 20 on the case 5. The connector side terminal 25a is connected to the primary coil terminal 23b, and the other connector side terminals 25b and 25c are connected to the igniter side terminals 22c and 22b, respectively. Further, the igniter side terminal 22a and the primary coil terminal 23a are connected. 1
The secondary coil terminals 23 a and 23 b are arranged on both sides of the igniter unit 20 because they are connected from the primary bobbin 1. Next, a method for connecting to the primary coil will be described in detail with reference to FIG. The primary coil terminal 2 is attached to the primary bobbin 1.
A pocket 1b for fixing 3a is provided, and the primary coil terminal 23a is press-fitted and fixed in the pocket 1b. Primary coil winding portion 23 of primary coil terminal 23a
a1 is bent from the primary bobbin 1 in the vertical direction in an L-shape, and is configured so that the end of the primary coil 2 can be easily wound. Further, a curved portion 23a2 is partially provided on the side to be welded to the igniter-side terminal 22a for the purpose of relaxing / absorbing stress during welding and preventing the stress from being transmitted to the primary coil winding portion 23a1. . Igniter side terminal 22a,
22b and 22c, and connector side terminals 25a and 25
Since b and 25c are processed into an L shape and the welding points are arranged in a horizontal row, the welding operation is facilitated.
Further, in the case of welding work, it is necessary to configure so that spatter is not scattered on the coil winding portion. In this embodiment, as shown in FIG. 7, the igniter unit 20 is arranged so as to cover the coil winding portion. . However, it is necessary to dispose the insulating epoxy resin 6 within a range that does not adversely affect the castability of the insulating epoxy resin 6 and the wiring from the primary coil 2. Further, in order to keep the range where the spatter is scattered away from the coil winding portion, the welding position of each terminal is the coil housing portion 5c of the case 5.
To 1 mm or more. Further, the tip of the terminal to be welded is arranged so as to come to a position 2 to 6 mm inside from the end face of the case 5, and it is always covered with the insulating epoxy resin 6 to ensure waterproof reliability.
【００１３】以上のようにイグナイタユニット２０を固
定し、絶縁用エポキシ樹脂６を注型硬化させた後、２次
ボビン３の高圧側コア９収納ポケット３ａに高圧側コア
９を収納し、接着剤で固定したのちにサイドコア８をサ
イドコア８のバネアクションを利用してケース５に装着
する。通常、エンジンのプラグホール径はφ２３〜２６
であるため、円筒形点火装置の最大外径は、φ２３以下
とする。After fixing the igniter unit 20 and casting-curing the insulating epoxy resin 6 as described above, the high pressure side core 9 is stored in the high pressure side core 9 storage pocket 3a of the secondary bobbin 3, and an adhesive is used. After fixing with, the side core 8 is attached to the case 5 using the spring action of the side core 8. Normally, the engine plug hole diameter is φ23-26
Therefore, the maximum outer diameter of the cylindrical ignition device is φ23 or less.
【００１４】図９，図１０はイグナイタユニット２０を
１チップタイプイグナイタ４２にした場合である。１チ
ップタイプイグナイタ４２は放熱用の金属板４１（例え
ば、銅，鉄，アルミ等が考えられるが、いずれも、樹脂
に埋没するため耐食性を考慮しなくても良いため、表面
処理をしなくても良い）にねじ止めするか、もしくは熱
伝導性に優れた接着剤で固定する。その金属板４１がケ
ース５に設けられた位置決め用突起５２，５４で固定さ
れる。端子の接続方法、構成等は、図１，図７，図８に
示す実施例と同様であるため説明は省略する。9 and 10 show a case where the igniter unit 20 is a one-chip type igniter 42. The one-chip type igniter 42 may be a metal plate 41 for heat dissipation (for example, copper, iron, aluminum, etc., but since they are buried in resin, corrosion resistance does not have to be considered, and therefore surface treatment is not required. (Also good) or fix with an adhesive with excellent thermal conductivity. The metal plate 41 is fixed by the positioning projections 52 and 54 provided on the case 5. The terminal connection method, configuration, etc. are similar to those of the embodiment shown in FIGS.
【００１５】更に、図６，図１４，図１５等に書いてあ
る１次ボビン下部の、マグネット１０と高圧側コア９と
の仕切り壁を１次ボビンの１成形部にするか、もしくは
シリコン系かエポキシ系接着剤等で仕切り袋状とするの
は、上述のとうりであるが、この仕切り寸法を０.３mm
〜１.０mmにすることで、２次側に発生する２次電圧値
がアップする。また、図１３に示すように、高圧側コア
９を入れないことで、作業性が飛躍的にアップするが、
２次電圧値が低下するので、エンジン側の要求する２次
電圧がそれ程高くないときには、コストを低く抑えられ
るので、この方式を採用する。Further, the partition wall between the magnet 10 and the high-voltage side core 9 at the lower part of the primary bobbin shown in FIGS. It is the same as the above that the partition bag shape is made with epoxy adhesive or the like, but this partition size is 0.3 mm.
By setting it to ~ 1.0 mm, the secondary voltage value generated on the secondary side increases. Further, as shown in FIG. 13, the workability is dramatically improved by not including the high-voltage side core 9, but
Since the secondary voltage value decreases, this method is adopted because the cost can be kept low when the secondary voltage required by the engine side is not so high.
【００１６】また、図１等書いてある様に、コア上部に
可とう性樹脂を流し込むのであるが、可とう性樹脂の代
わりに、ゴム材を装着すれば絶縁性樹脂をコイルに注型
するとき、コア７，１８から発生する空気をこのゴムか
ら逃がすことになり、安定した作業が可能となる。と言
うのは、空気が残存してはいけないエリアである２次コ
イル周辺を避け、空気を逃がすことが可能だからであ
る。Further, as shown in FIG. 1 and the like, the flexible resin is poured into the upper part of the core, but if a rubber material is attached instead of the flexible resin, the insulating resin is cast into the coil. At this time, the air generated from the cores 7 and 18 escapes from this rubber, and stable work becomes possible. This is because it is possible to escape the air by avoiding the area around the secondary coil, which is an area where air should not remain.
【００１７】図９，図１０に示してある上述の１チップ
イグナイタは、特願平7−143439 号に記述した内容であ
る。The above-mentioned one-chip igniter shown in FIGS. 9 and 10 has the contents described in Japanese Patent Application No. 7-143439.
【００１８】[0018]
【発明の効果】本発明によれば、高圧部に、空気等の泡
が残存しないため、更に、コアと絶縁用樹脂と隔離でき
るため、絶縁リークや、ヒートショックによるコイルの
機能を損なわないため、常に安定した内燃機関用点火装
置を供給することができる。According to the present invention, bubbles such as air do not remain in the high-pressure portion, and the core and the insulating resin can be separated from each other, so that insulation leakage and the function of the coil due to heat shock are not impaired. Therefore, it is possible to always supply a stable ignition device for an internal combustion engine.
【図１】本発明の一実施例の構成を示す断面図。FIG. 1 is a sectional view showing a configuration of an embodiment of the present invention.
【図２】本発明の一実施例の主要構成部品の展開図。FIG. 2 is an exploded view of main components according to an embodiment of the present invention.
【図３】本発明の一実施例のコア形状図。FIG. 3 is a core shape diagram of an embodiment of the present invention.
【図４】本発明の一実施例のコア形状図。FIG. 4 is a core shape diagram of an embodiment of the present invention.
【図５】本発明の一実施例のコア形状図。FIG. 5 is a core shape diagram of an embodiment of the present invention.
【図６】本発明の一実施例の１次ボビンぶくみの断面
図。FIG. 6 is a sectional view of a primary bobbin swelling according to an embodiment of the present invention.
【図７】本発明の一実施例のイグナイタユニットの配置
図。FIG. 7 is a layout view of an igniter unit according to an embodiment of the present invention.
【図８】本発明の一実施例の接続構造を示す断面図。FIG. 8 is a sectional view showing a connection structure according to an embodiment of the present invention.
【図９】本発明の一実施例のイグナイタユニットの配置
図。FIG. 9 is a layout view of an igniter unit according to an embodiment of the present invention.
【図１０】本発明の一実施例のイグナイタユニットの配
置図。FIG. 10 is a layout view of an igniter unit according to an embodiment of the present invention.
【図１１】図１に対し高圧側コア部に応力緩和材を入れ
た一実施例。FIG. 11 shows an embodiment in which a stress relaxation material is inserted in the core part on the high voltage side as compared with FIG.
【図１２】図１に対し１次ボビンを袋状にせず、高圧側
コアを配置したときの一実施例。FIG. 12 shows an example in which the high-pressure side core is arranged without forming the primary bobbin into a bag shape as compared with FIG.
【図１３】図１に対し高圧側コアを廃止したときの一実
施例。FIG. 13 shows an example in which the high pressure side core is abolished as compared with FIG.
【図１４】図１の拡大例。FIG. 14 is an enlarged example of FIG.
【図１５】高圧側コアを２次ボビンに一体成形したとき
の一実施例。FIG. 15 shows an example in which the high pressure side core is integrally molded with the secondary bobbin.
１…１次ボビン、１ａ…低圧側コア収納ポケット、１ｂ
…１次コイル端子圧入ポケット、２…１次コイル、３…
２次ボビン、３ａ…高圧側コア収納ポケット、４…２次
コイル、５…ケース、５ｃ…コイル収容部、６…絶縁用
エポキシ樹脂、７…センタコア、８…サイドコア、９…
低圧側コア、１０…マグネット、１１…コアギャップ、
１２…可とう性エポキシ樹脂、１３…高圧端子、１４…
スプリング、１５…ゴムブーツ、１６…シールゴム、１
７…高圧ダイオード、１８…低圧側コア、２０…イグナ
イタユニット、２１…パワートランジスタチップ、２
２，２２ａ，２２ｂ，２２ｃ…イグナイタ側端子、２
３，２３ａ，２３ｂ…１次コイル端子、２３ａ１…１次
コイル巻きつけ部、２３ａ２…１次コイル端子湾曲部、
２４…コネクタ、２５，２５ａ，２５ｂ，２５ｃ…コネ
クタ側端子、２６…金属性ベース、２７…端子台、２８
…ハイブリッドＩＣ回路、４１…放熱板、４２…１チッ
プイグナイタ、４３…穴、５２，５３，５４…位置決め
用突起、５５…ゴム。1 ... Primary bobbin, 1a ... Low pressure side core storage pocket, 1b
… Primary coil terminal press fit pocket, 2… Primary coil, 3…
Secondary bobbin, 3a ... High-voltage side core storage pocket, 4 ... Secondary coil, 5 ... Case, 5c ... Coil storage part, 6 ... Insulating epoxy resin, 7 ... Center core, 8 ... Side core, 9 ...
Low-voltage side core, 10 ... Magnet, 11 ... Core gap,
12 ... Flexible epoxy resin, 13 ... High voltage terminal, 14 ...
Spring, 15 ... Rubber boot, 16 ... Seal rubber, 1
7 ... High voltage diode, 18 ... Low voltage side core, 20 ... Igniter unit, 21 ... Power transistor chip, 2
2, 22a, 22b, 22c ... igniter side terminal, 2
3, 23a, 23b ... primary coil terminal, 23a1 ... primary coil winding portion, 23a2 ... primary coil terminal curved portion,
24 ... Connector, 25, 25a, 25b, 25c ... Connector side terminal, 26 ... Metal base, 27 ... Terminal block, 28
... hybrid IC circuit, 41 ... heat sink, 42 ... 1-chip igniter, 43 ... hole, 52, 53, 54 ... positioning protrusion, 55 ... rubber.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 渡辺 博 茨城県ひたちなか市大字高場2520番地 株 式会社日立製作所自動車機器事業部内 (72)発明者 安蔵 洋一 茨城県ひたちなか市大字高場2520番地 株 式会社日立製作所自動車機器事業部内 (72)発明者 片岸 健一 茨城県ひたちなか市大字高場字鹿島谷津 2477番地３日立オートモティブエンジニア リング株式会社内 (72)発明者 近藤 英一郎 茨城県ひたちなか市大字高場字鹿島谷津 2477番地３日立オートモティブエンジニア リング株式会社内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hiroshi Watanabe 2520 Takaba, Hitachinaka City, Ibaraki Prefecture Hitachi Ltd. Automotive Equipment Division, Hitachi Ltd. (72) Yoichi Azo, 2520 Takaba, Hitachinaka City, Ibaraki Prefecture Company Hitachi, Ltd. Automotive Equipment Division (72) Inventor Kenichi Katagishi, Takahata, Ibaraki Pref., Takaba 2477 Kashima Yatsu 3 Hitachi Automotive Engineering Co., Ltd. (72) Inventor, Eiichiro Kondo, Hitachinaka, Ibaraki, Kataka Yatsu 2477 3 Hitachi Automotive Engineering Co., Ltd.
Claims (3)
容される円筒形の内燃機関用点火装置において、１次コ
イルの内側に配置されるセンタコア及び２次コイルの外
側に珪素鋼板により円筒形に形成され、かつ円筒形の縦
方向に切りかけ部を有するサイドコアが配置され、前記
センタコアとサイドコアが、２次コイルの低圧側及び高
圧側に配置されたコアにより磁気的に間接的に結合され
た閉磁路コアを持つ内燃機関用点火装置において、１次
巻線，２次巻線をそれぞれ巻回した１次ボビンと２次ボ
ビンを接着し、該高圧側に配置したコアを２次ボビンに
収納し、接着させしむ構造としたことを特徴とした内燃
機関用点火装置。1. In a cylindrical ignition device for an internal combustion engine, which is directly connected to an ignition plug and is housed in a plug hole, a cylindrical shape is formed by a silicon steel plate on the outside of a center core arranged inside a primary coil and a secondary coil. And a cylindrical side core having a vertical cut portion is disposed, and the center core and the side core are magnetically indirectly coupled by the cores disposed on the low voltage side and the high voltage side of the secondary coil. In an internal combustion engine ignition device having a closed magnetic circuit core, a primary bobbin and a secondary bobbin wound with a primary winding and a secondary winding, respectively, are bonded, and the core arranged on the high voltage side is housed in the secondary bobbin. An ignition device for an internal combustion engine, which has a structure in which it is bonded.
に成形したことを特徴とする内熱機関用点火装置。2. The ignition device for an internal heat engine according to claim 1, wherein the primary bobbin is formed into a bag shape.
に配置するコアを２次ボビンに一体に成形したことを特
徴とする内燃機関用点火装置。3. The ignition device for an internal combustion engine according to claim 1 or 2, wherein the core arranged on the low pressure side is formed integrally with the secondary bobbin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7165141A JPH0917662A (en) | 1995-06-30 | 1995-06-30 | Ignition device for internal-combustion engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7165141A JPH0917662A (en) | 1995-06-30 | 1995-06-30 | Ignition device for internal-combustion engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0917662A true JPH0917662A (en) | 1997-01-17 |
Family
ID=15806676
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7165141A Pending JPH0917662A (en) | 1995-06-30 | 1995-06-30 | Ignition device for internal-combustion engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0917662A (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0859383A2 (en) * | 1997-02-14 | 1998-08-19 | Denso Corporation | Stick-type ignition coil having improved structure against crack or dielectric discharge |
| EP1026394A2 (en) | 1999-02-08 | 2000-08-09 | Hitachi, Ltd. | Ignition coil for internal combustion engine |
| US6196209B1 (en) | 1998-06-26 | 2001-03-06 | Hitachi, Ltd. | Ignition coil device for engine |
| US6332458B1 (en) | 1997-05-23 | 2001-12-25 | Hitachi, Ltd. | Ignition coil unit for engine and engine provided with plastic head cover |
| US6337616B1 (en) * | 1998-12-24 | 2002-01-08 | Hitachi, Ltd. | Ignition coil for internal-combustion engine |
| KR20020043803A (en) * | 2000-12-04 | 2002-06-12 | 배길훈 | Stick coil assembly for vehicle |
| US6930583B2 (en) | 1997-02-14 | 2005-08-16 | Denso Corporation | Stick-type ignition coil having improved structure against crack or dielectric discharge |
| US7234454B2 (en) | 2005-07-12 | 2007-06-26 | Denso Corporation | Ignition coil and method for manufacturing an ignition coil |
| JP2008130885A (en) * | 2006-11-22 | 2008-06-05 | Hanshin Electric Co Ltd | Ignition coil for internal combustion engine |
| JP2009270490A (en) * | 2008-05-08 | 2009-11-19 | Hanshin Electric Co Ltd | Ignition coil for internal combustion engine |
-
1995
- 1995-06-30 JP JP7165141A patent/JPH0917662A/en active Pending
Cited By (26)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6977574B1 (en) | 1997-02-14 | 2005-12-20 | Denso Corporation | Stick-type ignition coil having improved structure against crack or dielectric discharge |
| EP0859383A3 (en) * | 1997-02-14 | 1998-09-23 | Denso Corporation | Stick-type ignition coil having improved structure against crack or dielectric discharge |
| US6525636B1 (en) | 1997-02-14 | 2003-02-25 | Denso Corporation | Stick-type ignition coil having improved structure against crack or dielectric discharge |
| US6930583B2 (en) | 1997-02-14 | 2005-08-16 | Denso Corporation | Stick-type ignition coil having improved structure against crack or dielectric discharge |
| US6208231B1 (en) | 1997-02-14 | 2001-03-27 | Denso Corporation | Stick-type ignition coil having improved structure against crack or dielectric discharge |
| EP0859383A2 (en) * | 1997-02-14 | 1998-08-19 | Denso Corporation | Stick-type ignition coil having improved structure against crack or dielectric discharge |
| EP1253606A1 (en) * | 1997-02-14 | 2002-10-30 | Denso Corporation | Stick-type ignition coil having improved structure against crack or dielectric discharge |
| US7071804B2 (en) | 1997-02-14 | 2006-07-04 | Denso Corporation | Stick-type ignition coil having improved structure against crack or dielectric discharge |
| US7068135B1 (en) | 1997-02-14 | 2006-06-27 | Denso Corporation | Stick-type ignition coil having improved structure against crack or dielectric discharge |
| US6995644B2 (en) | 1997-02-14 | 2006-02-07 | Denso Corporation | Stick-type ignition coil having improved structure against crack or dielectric discharge |
| US7487767B2 (en) | 1997-05-23 | 2009-02-10 | Hitachi, Ltd. | Ignition coil for use in engine and engine having plastic cylinder head cover |
| EP1878910A2 (en) | 1997-05-23 | 2008-01-16 | Hitachi, Ltd. | Ignition coil for use in engine |
| US6332458B1 (en) | 1997-05-23 | 2001-12-25 | Hitachi, Ltd. | Ignition coil unit for engine and engine provided with plastic head cover |
| EP1878910A3 (en) * | 1997-05-23 | 2009-03-18 | Hitachi, Ltd. | Ignition coil for use in engine |
| US6571784B2 (en) | 1997-05-23 | 2003-06-03 | Hitachi, Ltd. | Ignition coil for use in engine and engine having plastic cylinder head cover |
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| US6343595B1 (en) | 1999-02-08 | 2002-02-05 | Hitachi, Ltd. | Ignition coil for internal combustion engine |
| EP1026394A2 (en) | 1999-02-08 | 2000-08-09 | Hitachi, Ltd. | Ignition coil for internal combustion engine |
| KR20020043803A (en) * | 2000-12-04 | 2002-06-12 | 배길훈 | Stick coil assembly for vehicle |
| US7234454B2 (en) | 2005-07-12 | 2007-06-26 | Denso Corporation | Ignition coil and method for manufacturing an ignition coil |
| JP2008130885A (en) * | 2006-11-22 | 2008-06-05 | Hanshin Electric Co Ltd | Ignition coil for internal combustion engine |
| JP2009270490A (en) * | 2008-05-08 | 2009-11-19 | Hanshin Electric Co Ltd | Ignition coil for internal combustion engine |
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