JPH069178B2 - Ignition coil for internal combustion engine - Google Patents
Ignition coil for internal combustion engineInfo
- Publication number
- JPH069178B2 JPH069178B2 JP61132123A JP13212386A JPH069178B2 JP H069178 B2 JPH069178 B2 JP H069178B2 JP 61132123 A JP61132123 A JP 61132123A JP 13212386 A JP13212386 A JP 13212386A JP H069178 B2 JPH069178 B2 JP H069178B2
- Authority
- JP
- Japan
- Prior art keywords
- ignition coil
- combustion engine
- internal combustion
- coil
- magnetic circuit
- 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.)
- Expired - Lifetime
Links
Landscapes
- Ignition Installations For Internal Combustion Engines (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 この発明は例えば自動車のデイストリビユータに配置さ
れるイグニツシヨンコイルに関するものである。DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to an ignition coil arranged in a distributor of an automobile, for example.
内燃機関用イグニツシヨンコイルは特開昭５５−４６０
６７号、実開昭５８−１１１９１２号公報等に示まれる
通り種々公知である。これらはいずれもＵ字形コア１組
で閉磁路（鉄心）が構成されている。従つて閉磁路の断
面積を大きくとろうとすると、コイル外周部に突出する
部分も大きくなり、閉磁路（鉄心）の大型化、即ち、イ
グニツシヨンコイルの大型化を招く。この不都合を解決
するものとして第５図および第６図に示す内燃機関用イ
グニツシヨンコイルが提案された。An ignition coil for an internal combustion engine is disclosed in JP-A-55-460.
No. 67, Japanese Utility Model Laid-Open No. 58-111912 and the like are known. In all of these, one set of U-shaped cores constitutes a closed magnetic circuit (iron core). Therefore, if an attempt is made to increase the cross-sectional area of the closed magnetic circuit, the portion protruding to the outer peripheral portion of the coil also becomes large, which leads to an increase in the size of the closed magnetic circuit (iron core), that is, an increase in the size of the ignition coil. As a solution to this inconvenience, the ignition coil for internal combustion engine shown in FIGS. 5 and 6 has been proposed.
第５図はその平面図、第６図は第５図の線VI−VIの断面
図である。図において（２）は内燃機関の回転に同期し
て回転されるシヤフトを通すための孔、（３）は孔
（２）にシヤフトを通すようにしたリング状の点火コイ
ルである。（３ａ）は合成樹脂材料からなるケース、
（３ｂ）はケース（３ａ）に設置されてセミ閉磁路を形
成する鉄心、（３ｃ）はセミ閉磁路用のギヤツプ、（３
ｄ）は１次コイル、（３ｅ）は２次コイル、（３ｆ）は
ケース（３ａ）内に充填されてケース（３ａ）、鉄心
（３ｂ）、両コイル（３ｄ），（３ｅ）を一体的に含浸
固着するレンジである。鉄心（３ｂ）はシヤフトを通す
ための孔（２）と同軸状の筒状の中央脚部（３０１）
と、この中央脚部（３０１）の軸方向一端側に磁気的に
結合されかつ径方向四方に延在される一端側十字状腕部
（３０２）と、中央脚部（３０１）の軸方向他端側に磁
気的に結合されかつ径方向四方に延在される他端側十字
状腕部（３０３）と、両腕部（３０２），（３０３）の
腕端をそれぞれ磁気的に結合する外側脚部（３０４）と
からなつている。なお腕部（３０３）は放熱のためケー
ス（３ａ）の外面に露出するように配置されている。5 is a plan view thereof, and FIG. 6 is a sectional view taken along line VI-VI of FIG. In the figure, (2) is a hole for passing a shaft which is rotated in synchronism with the rotation of the internal combustion engine, and (3) is a ring-shaped ignition coil which allows the shaft to be passed through the hole (2). (3a) is a case made of synthetic resin material,
(3b) is an iron core installed in the case (3a) to form a semi-closed magnetic circuit, (3c) is a gear cup for the semi-closed magnetic circuit, (3)
d) is a primary coil, (3e) is a secondary coil, and (3f) is filled in the case (3a) so that the case (3a), the iron core (3b), and both coils (3d) and (3e) are integrated. It is the range that is impregnated and fixed in the. The iron core (3b) is a cylindrical central leg (301) coaxial with the hole (2) for passing the shaft.
And one end side cross-shaped arm portion (302) magnetically coupled to one end side of the central leg portion (301) in the axial direction and extending in four radial directions, and the other axial direction of the central leg portion (301). The other side cross-shaped arm portion (303) magnetically coupled to the end side and extending in four radial directions, and the outer side that magnetically couples the arm ends of both arm portions (302) and (303), respectively. It consists of legs (304). The arm portion (303) is arranged so as to be exposed on the outer surface of the case (3a) for heat dissipation.
従来の内燃機関用イグニツシヨンコイルは上記のように
構成され、第３図に示す如く、バツテリ（４）から１次
コイル（３ｄ）への電流を電子回路（５）で断続するこ
とにより２次コイル（３ｅ）に高電圧（Ｖ２）を発生さ
せる点火プラグに火花放電させる。The conventional ignition coil for an internal combustion engine is constructed as described above, and as shown in FIG. 3, the electric current from the battery (4) to the primary coil (3d) is interrupted by the electronic circuit (5). Spark discharge is generated in the spark plug that generates a high voltage (V 2 ) in the next coil (3e).
上記のような従来のイグニツシヨンコイルでは、鉄心
（３ｂ）が十字形の腕部（３０３），（３０２）を有し
ていて、これが第５図における平面に平行な平板を積層
して構成されているため十字形の腕部（３０３），（３
０２）の中央部および筒状の中央脚部においてうず電流
損がある。更には腕部（３０３），（３０２）、中央脚
部（３０１）および外側脚部（３０４）が各々対接する
個所においては多大な磁気抵抗を生じる。従つて、これ
らうず電流損および磁気抵抗により２次発生電圧が低く
なるという問題点があつた。In the conventional ignition coil as described above, the iron core (3b) has cross-shaped arms (303) and (302), which are constructed by laminating flat plates parallel to the plane in FIG. The cross-shaped arms (303), (3
There is an eddy current loss in the central part of 02) and the cylindrical central leg part. Further, a great magnetic resistance is generated at the points where the arms (303), (302), the central leg (301) and the outer leg (304) are in contact with each other. Therefore, there is a problem that the secondary generated voltage becomes low due to the eddy current loss and the magnetic resistance.
この発明は、かかる問題点を解決するためになされたも
ので、鉄心におけるうず電流損をなくし、かつ鉄心の磁
気抵抗を減少して２次発生電圧の向上が計れる内燃機関
用イグニツシヨンコイルを提供することを目的とする。The present invention has been made in order to solve the above problems, and provides an ignition coil for an internal combustion engine capable of eliminating the eddy current loss in the iron core and reducing the magnetic resistance of the iron core to improve the secondary generated voltage. The purpose is to provide.
この発明に係るイグニツシヨンコイルの磁気回路は、Ｕ
字形コア素片を積層形成したＵ字形コアを２個組み合わ
せてなる閉磁路を複数個有するように構成したものであ
る。The magnetic circuit of the ignition coil according to the present invention is U
It is configured to have a plurality of closed magnetic paths formed by combining two U-shaped cores each formed by stacking the U-shaped core pieces.
この発明においては、十字形の腕部が積層形成されてお
り、かつ、筒状の中央脚部を使用しないのでこの部分に
おけるうず電流損は減少する。また、必要とするエアギ
ヤツプ（３ｃ）以外は一個所のみで切れているので従来
の如く三個所の対接個所における多大な磁気抵抗による
磁力線の損失は減少される。In the present invention, the cruciform arms are laminated and the cylindrical central leg is not used, so the eddy current loss in this part is reduced. Also, since the cutting is done only at one place except for the required air gear (3c), the loss of the magnetic force lines due to the great magnetic resistance at the three facing places as in the prior art is reduced.
〔実施例〕 第１図および第２図はこの発明の一実施例を示す図であ
り、第１図はその平面図、第２図は第１図の線II−IIの
断面図である。図において、（２），（３），（３ａ）
〜（３ｆ）は上記従来のイグニツシヨンコイルに対応す
るものである。（３０５）はＵ字形コア部材である。こ
のＵ字形コア部材（３０５）は足の長さがわずかに異な
つている。従つて１次コイル（３ｄ）および２次コイル
（３ｅ）を包囲するように上方のＵ字形コア部材（３０
５）と下方のＵ字形コア部材（３０５）とを突き合わせ
るとエアギヤツプ（３ｃ）を生ぜしめる（第２図参
照）。かくしてほぼ同じ形のＵ字形コア部材（３０５）
を８個用意して、第１図に示す如く、四方に延びた鉄心
（３ｂ）を形成することが出来る。[Embodiment] FIGS. 1 and 2 are views showing an embodiment of the present invention, FIG. 1 is a plan view thereof, and FIG. 2 is a sectional view taken along line II-II in FIG. In the figure, (2), (3), (3a)
(3f) correspond to the above-mentioned conventional ignition coil. (305) is a U-shaped core member. The U-shaped core member (305) has slightly different leg lengths. Therefore, the upper U-shaped core member (30) is formed so as to surround the primary coil (3d) and the secondary coil (3e).
5) and the lower U-shaped core member (305) are abutted against each other to generate an air gear cup (3c) (see FIG. 2). Thus, a U-shaped core member (305) having almost the same shape
It is possible to form eight iron cores (3b) extending in four directions by preparing eight pieces as shown in FIG.
上記のように構成されたイグニツシヨンコイルにおいて
は、エアギヤツプ（３ｃ）を有するセミ閉磁路は（１
０）において切れているのみである。これに対し従来の
ものでは第６図に示される如く３個所の切れ目（１０）
がある。従つて本発明ではより有効な磁路が形成され
る。また、従来の十字形の腕部および筒状の中央脚部を
本発明では除去しているので、従来の腕部および中央脚
部におけるうず電流は本発明のイグニツシヨンコイルに
おいては減少する。すなわち第１図において、その平面
に垂直な平板を積層してＵ字形コア部材が形成されてい
るからである。In the ignition coil constructed as described above, the semi-closed magnetic circuit having the air gear (3c) is (1
It is only broken at 0). On the other hand, in the conventional one, as shown in FIG. 6, there are three breaks (10).
There is. Therefore, in the present invention, a more effective magnetic path is formed. Further, since the conventional cross-shaped arm portion and the tubular central leg portion are removed in the present invention, the eddy current in the conventional arm portion and the central leg portion is reduced in the ignition coil of the present invention. That is, in FIG. 1, flat plates perpendicular to the plane are laminated to form the U-shaped core member.
本発明のイグニツシヨンコイルを第３図に示す如く接続
して、１次コイルに流れる電流を変化させて断続させた
結果２次コイルに発生する電圧（Ｖ２）を第４図に実線
で示す。なお第４図に点線で示されたものは従来のイグ
ニツシヨンコイルによるものである。この図から明らか
な如く、本発明では２次コイルの出力はアツプされてい
る。The ignition coil of the present invention is connected as shown in FIG. 3 and the voltage (V 2 ) generated in the secondary coil as a result of changing and interrupting the current flowing through the primary coil is shown by the solid line in FIG. Show. The one shown by the dotted line in FIG. 4 is based on a conventional ignition coil. As is clear from this figure, in the present invention, the output of the secondary coil is up.
なお、上記実施例ではＵ字形コア部材が上下に対をなし
て閉磁路を形成しているが、半径方向に対をなして閉磁
路を形成するようになしてもよい。また、各々の閉磁路
を電気的に分離した場合には、十字形腕部および中央脚
部のうず電流通流経路を断ち切り、上記部材に流れるう
ず電流をなくすることができる。In the above embodiment, the U-shaped core members are paired vertically to form the closed magnetic path, but they may be paired in the radial direction to form the closed magnetic path. Further, when each closed magnetic circuit is electrically separated, the eddy current flowing path of the cross-shaped arm portion and the central leg portion can be cut off to eliminate the eddy current flowing in the member.
この発明は以上説明したとおり、従来の如き十字形腕部
におけるうず電流損はなくなり、かつ磁力線の切断個所
が少なくなつているので、２次電圧のアツプが計れると
いう効果がある。すなわち、従来のものと比べて同一体
積で高出力化が達成でき、逆に出力を同一にすると小形
化が達成できる。また、鉄心を達成するコア部材の継目
個所が少ないため熱放散がよくなつているという効果が
ある。更に、鉄心を構成するコア部材が少ない種類で構
成でき、部品点数の削減ならびにコストの低減化を達成
するという効果も有する。また、磁気回路は複数個の閉
磁路で構成されているのでイグニツシヨンコイルの小型
化が計れる。As described above, according to the present invention, the eddy current loss in the conventional cross-shaped arm portion is eliminated, and the number of cutting points of the magnetic force lines is reduced, so that the secondary voltage can be measured up. That is, higher output can be achieved with the same volume as compared with the conventional one, and conversely, smaller output can be achieved with the same output. Further, there is an advantage that the heat dissipation is good because the number of joints of the core member that achieves the iron core is small. Furthermore, the core member that constitutes the iron core can be configured with a small number of types, and there is an effect that the number of parts and the cost can be reduced. Also, since the magnetic circuit is composed of a plurality of closed magnetic circuits, the ignition coil can be downsized.
第１図はこの発明の一実施例を示す平面図、第２図は第
１図の線II−IIに沿う断面図、第３図はイグニツシヨン
コイルに対しての一般的な配線を示す図、第４図は２次
電圧の比較図、第５図は従来の内燃機関用イグニツシヨ
ンコイルを示す平面図、第６図は第５図の線VI−VIに沿
う断面図である。 図において、（３ｂ）は閉磁路コア、（３ｄ）は１次コ
イル、（３ｅ）は２次コイル、（３０５）は１種類のＵ
字形コア素片である。 なお、各図中同一符号は同一または相当部分を示す。FIG. 1 is a plan view showing an embodiment of the present invention, FIG. 2 is a sectional view taken along the line II-II in FIG. 1, and FIG. 3 shows general wiring for an ignition coil. 4 and 5 are comparative diagrams of secondary voltage, FIG. 5 is a plan view showing a conventional ignition coil for an internal combustion engine, and FIG. 6 is a sectional view taken along line VI-VI in FIG. In the figure, (3b) is a closed magnetic circuit core, (3d) is a primary coil, (3e) is a secondary coil, and (305) is one type of U.
It is a letter-shaped core piece. In the drawings, the same reference numerals indicate the same or corresponding parts.
Claims (3)
りかこむようになした磁気回路を具備してなる内燃機関
用イグニツシヨンコイルにおいて、上記磁気回路はＵ字
形コア素片を積層形成したＵ字形コアを２個組み合わせ
てなる閉磁路を複数個有することを特徴とする内燃機関
用イグニツシヨンコイル。1. An ignition coil for an internal combustion engine, comprising a primary coil, a secondary coil, and a magnetic circuit enclosing them, wherein the magnetic circuit is a U-shaped core element laminated and formed. An ignition coil for an internal combustion engine, having a plurality of closed magnetic paths formed by combining two V-shaped cores.
路となされている特許請求の範囲第１項記載の内燃機関
用イグニツシヨンコイル。2. The ignition coil for an internal combustion engine according to claim 1, wherein the U-shaped cores are vertically paired to form a closed magnetic circuit.
となされている特許請求の範囲第１項記載の内燃機関用
イグニツシヨンコイル。3. The ignition coil for an internal combustion engine according to claim 1, wherein the U-shaped cores are paired in the radial direction to form a closed magnetic circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61132123A JPH069178B2 (en) | 1986-06-05 | 1986-06-05 | Ignition coil for internal combustion engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61132123A JPH069178B2 (en) | 1986-06-05 | 1986-06-05 | Ignition coil for internal combustion engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62287607A JPS62287607A (en) | 1987-12-14 |
| JPH069178B2 true JPH069178B2 (en) | 1994-02-02 |
Family
ID=15073944
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61132123A Expired - Lifetime JPH069178B2 (en) | 1986-06-05 | 1986-06-05 | Ignition coil for internal combustion engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH069178B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6294974B1 (en) | 1998-01-23 | 2001-09-25 | Sumitomo Wiring Systems, Ltd. | Ignition coil for internal combustion engine, and method of manufacturing an ignition coil |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5546067A (en) * | 1978-09-28 | 1980-03-31 | Nippon Soken Inc | Igniter |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58111912U (en) * | 1982-01-22 | 1983-07-30 | 阪神エレクトリツク株式会社 | molded ignition coil |
-
1986
- 1986-06-05 JP JP61132123A patent/JPH069178B2/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5546067A (en) * | 1978-09-28 | 1980-03-31 | Nippon Soken Inc | Igniter |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6294974B1 (en) | 1998-01-23 | 2001-09-25 | Sumitomo Wiring Systems, Ltd. | Ignition coil for internal combustion engine, and method of manufacturing an ignition coil |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62287607A (en) | 1987-12-14 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |