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JP3902643B2 - Ignition coil for internal combustion engine - Google Patents

Ignition coil for internal combustion engine Download PDF

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Publication number
JP3902643B2
JP3902643B2 JP2004170621A JP2004170621A JP3902643B2 JP 3902643 B2 JP3902643 B2 JP 3902643B2 JP 2004170621 A JP2004170621 A JP 2004170621A JP 2004170621 A JP2004170621 A JP 2004170621A JP 3902643 B2 JP3902643 B2 JP 3902643B2
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secondary coil
diode
coil
winding
internal combustion
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JP2005351119A (en
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康吉 山田
玲 高田
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阪神エレクトリック株式会社
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Description

この発明は、自動車のエンジンなどの内燃機関の点火プラグへ火花放電を発生させるための高電圧を供給する内燃機関用点火コイルに関するものである。   The present invention relates to an ignition coil for an internal combustion engine that supplies a high voltage for generating a spark discharge to an ignition plug of an internal combustion engine such as an automobile engine.

上記した内燃機関用点火コイルは、一次コイルへの通電開始時に二次コイルに誘導される高電圧を点火プラグへ印加するのを阻止し、一次コイルへの通電終了時に二次コイルに誘導される高電圧を点火プラグへ印加させるダイオードを備えている。
そして、ダイオードの本体部を固定する収容部は、二次コイルを形成する巻線を巻き付ける二次コイルボビンの側面に設けられている。
特開平9−158821号公報
The ignition coil for an internal combustion engine described above prevents application of a high voltage induced in the secondary coil to the ignition plug when energization to the primary coil is started, and is induced to the secondary coil when energization to the primary coil is completed. A diode for applying a high voltage to the spark plug is provided.
And the accommodating part which fixes the main-body part of a diode is provided in the side surface of the secondary coil bobbin which winds the coil | winding which forms a secondary coil.
Japanese Patent Laid-Open No. 9-158821

従来の上記した内燃機関用点火コイルは、ダイオードの本体部を収容する収容部がダイオードの本体部の両端部分を固定する端部固定部分を対向させた構成とされているので、ダイオードの本体部が絶縁樹脂で直接モールドされている。
したがって、温度が変化することにより、ダイオードの本体部が絶縁樹脂の熱応力を受け、ダイオードの本体部が損傷して機能しなくなる恐れがある。
また、ダイオードの本体部を固定する端部固定部分の開口が二次コイルを形成する巻線の巻き付け方向と平行しているため、すなわち、開口が二次コイルボビンの周面に開放しているため、端部固定部分に固定させたダイオードの本体部から突出するリードに巻線の一端を予め巻き付けてその巻線を二次コイルボビンに巻き付けると、巻線を回転させる遠心力により、ダイオードの本体部が端部固定部分から外れ、ダイオードの位置がずれる恐れがある。
In the conventional ignition coil for an internal combustion engine described above, the housing portion for housing the main body portion of the diode is configured so that the end fixing portions for fixing the both end portions of the main body portion of the diode face each other. Is molded directly with insulating resin.
Therefore, when the temperature changes, the main body of the diode is subjected to the thermal stress of the insulating resin, and the main body of the diode may be damaged and not function.
Also, the opening of the end fixing portion that fixes the main body of the diode is parallel to the winding direction of the winding forming the secondary coil, that is, the opening is open to the peripheral surface of the secondary coil bobbin. When one end of the winding is wound in advance around a lead protruding from the diode main body fixed to the end fixing portion and the winding is wound around the secondary coil bobbin, the main body of the diode is caused by centrifugal force that rotates the winding. May be disengaged from the end fixing portion and the position of the diode may be shifted.

この発明は、以下のような発明である。
(1)一次コイルへの通電開始時に二次コイルに誘導される高電圧を点火プラグへ印加するのを阻止し、前記一次コイルへの通電終了時に前記二次コイルに誘導される高電圧を前記点火プラグへ印加させるダイオードを備えた内燃機関用点火コイルにおいて、前記二次コイルを形成する巻線を巻き付ける二次コイルボビンの側面に、前記ダイオードの本体部を収容する一面が開口した袋形状の収容部を設け、前記ダイオードの本体部を収容する前記収容部の開口を、前記二次コイルを形成する巻線の巻き付け方向と直交させたことを特徴とする。
The present invention is as follows.
(1) The high voltage induced in the secondary coil at the start of energization of the primary coil is prevented from being applied to the spark plug, and the high voltage induced in the secondary coil at the end of energization of the primary coil is In an internal combustion engine ignition coil having a diode to be applied to a spark plug, a bag-shaped housing in which one surface for housing a body portion of the diode is opened on a side surface of a secondary coil bobbin around which a winding forming the secondary coil is wound setting a part only, the accommodating opening of the housing the main body portion of the diode, characterized in that is perpendicular to the winding direction of the winding which forms the secondary coil.

この発明によれば、二次コイルを形成する巻線を巻き付ける二次コイルボビンの側面に、ダイオードの本体部を収容する一面が開口した袋形状の収容部を設けたので、この収容部によってダイオードの本体部の大部分が覆われる。
したがって、温度が変化しても、ダイオードの本体部が絶縁樹脂の熱応力を直接受けなくなり、ダイオードの本体部が損傷する恐れがなくなる。
そして、ダイオードの本体部を収容する収容部の開口を、二次コイルを形成する巻線の巻き付け方向と直交させたので、すなわち、開口を二次コイルボビンの軸方向へ開放させたので、収容部に本体部を固定させたダイオードのリードに巻線の一端を予め巻き付けてその巻線を二次コイルボビンに巻き付けても、巻線を回転させる遠心力により、ダイオードの本体部が収容部から外れ、ダイオードの位置がずれる恐れがなくなる。
According to the present invention, since the bag-shaped accommodation portion having an opening for housing the main body portion of the diode is provided on the side surface of the secondary coil bobbin around which the winding forming the secondary coil is wound, Most of the main body is covered.
Therefore, even if the temperature changes, the main body of the diode is not directly subjected to the thermal stress of the insulating resin, and there is no possibility of damaging the main body of the diode.
And since the opening of the housing portion that houses the main body portion of the diode is orthogonal to the winding direction of the winding forming the secondary coil, that is, the opening is opened in the axial direction of the secondary coil bobbin. Even if one end of the winding is wound in advance on the lead of the diode with the main body fixed to the coil and the winding is wound around the secondary coil bobbin, the main body of the diode is detached from the housing portion by the centrifugal force that rotates the winding, There is no risk of the diode being displaced.

以下、この発明を図に基づいて説明する。
図1はこの発明の一実施例である内燃機関用点火コイルの構成を示す断面図、図2は図1に示した二次コイルボビンの平面図、図3は図2に示した二次コイルボビンの右側面図である。
Hereinafter, the present invention will be described with reference to the drawings.
FIG. 1 is a sectional view showing the configuration of an ignition coil for an internal combustion engine according to an embodiment of the present invention, FIG. 2 is a plan view of the secondary coil bobbin shown in FIG. 1, and FIG. 3 is a plan view of the secondary coil bobbin shown in FIG. It is a right view.

これらの図において、内燃機関用点火コイル11は、コイル−鉄心組立体12と、このコイル−鉄心組立体12を収容する絶縁ケース30と、この絶縁ケース30のソケット部30sに設けられた複数の一次端子31と、絶縁ケース30の高圧タワー部30hに設けられた高圧端子32と、絶縁ケース30内に充填され、硬化することによって収容したコイル−鉄心組立体12を絶縁ケース30内に固定する、エポキシ樹脂などの絶縁樹脂33とで構成されている。   In these drawings, an ignition coil 11 for an internal combustion engine includes a coil-iron core assembly 12, an insulating case 30 that houses the coil-iron core assembly 12, and a plurality of socket portions 30s provided in the insulating case 30. The primary terminal 31, the high voltage terminal 32 provided in the high voltage tower portion 30 h of the insulating case 30, and the coil-iron assembly 12 accommodated in the insulating case 30 and fixed by being cured are fixed in the insulating case 30. And an insulating resin 33 such as an epoxy resin.

上記したコイル−鉄心組立体12は、一次コイルボビン13と、この一次コイルボビン13の外周に巻線を巻回して形成され、両端が一次端子31に接続された一次コイル14と、一次コイルボビン13および一次コイル14の外側に位置する二次コイルボビン15と、この二次コイルボビン15の側面に一体的に設けられた直方体形状をした袋形状の収容部16と、二次コイルボビン15の外周に巻線を巻回して形成され、低圧側が、例えば、一次端子31に接続された二次コイル23と、収容部16に本体部24bが収容され、一方のリード24l(アノード側)が二次コイル23の高圧側に接続されたダイオード24と、このダイオード24の他方のリード24l(カソード側)に接続されて二次コイルボビン15に取り付けられ、先端が高圧端子32に接触する接続ピン25と、一次コイル14および二次コイル23を貫通し、一次コイル14と二次コイル23とを磁気的に接続する鉄心部26とで構成されている。   The coil-iron core assembly 12 described above includes a primary coil bobbin 13, a primary coil 14 formed by winding a winding around the outer periphery of the primary coil bobbin 13, and both ends connected to the primary terminal 31, the primary coil bobbin 13, and the primary coil bobbin 13. A secondary coil bobbin 15 located outside the coil 14, a rectangular parallelepiped bag-shaped housing 16 integrally provided on the side surface of the secondary coil bobbin 15, and windings are wound around the outer periphery of the secondary coil bobbin 15. For example, the secondary coil 23 connected to the primary terminal 31 and the main body 24b are accommodated in the accommodating portion 16, and one lead 24l (anode side) is the high-voltage side of the secondary coil 23. Is connected to the secondary coil bobbin 15 and connected to the other lead 24l (cathode side) of the diode 24, There the connection pin 25 in contact with the high voltage terminal 32, through the primary coil 14 and secondary coil 23, and a core portion 26 which connects the primary coil 14 and secondary coil 23 magnetically.

そして、収容部16は、ダイオード24の本体部24bを収容できるように、二次コイルボビン15の右側から軸方向へ突出する底壁部17と、この底壁部17の左側に位置し、二次コイルボビン15の側部でもある左側壁部18と、二次コイルボビン15の右側から軸方向へ突出し、底壁部17の前後に連なる前壁部19および後壁部20と、二次コイルボビン15の右側から軸方向へ突出し、前壁部19および後壁部20に連なる天井壁部21とで構成されている。
なお、収容部16の右側壁部分は開口22とされ、二次コイルボビン15の軸方向へ開放している。
上記した前壁部19および後壁部20には、ダイオード24のリード24l,24lを挿入できるリード挿入溝19d,20dが設けられ、また、天井壁部21には、切欠21nが設けられている。
And the accommodating part 16 is located in the left side of the bottom wall part 17 which protrudes from the right side of the secondary coil bobbin 15 to an axial direction, and the left side of this bottom wall part 17 so that the main body part 24b of the diode 24 can be accommodated. The left wall 18 that is also the side of the coil bobbin 15, the front wall 19 and the rear wall 20 that protrude in the axial direction from the right side of the secondary coil bobbin 15, and are connected to the front and rear of the bottom wall 17, and the right side of the secondary coil bobbin 15 Projecting in the axial direction from the front wall 19 and the ceiling wall 21 connected to the rear wall 20.
The right side wall portion of the housing portion 16 is an opening 22 and is open in the axial direction of the secondary coil bobbin 15.
The front wall portion 19 and the rear wall portion 20 are provided with lead insertion grooves 19d and 20d into which the leads 24l and 24l of the diode 24 can be inserted, and the ceiling wall portion 21 is provided with a notch 21n. .

そして、鉄心部26は、一次コイル14および二次コイル23を貫通する直線鉄心部27と、この直線鉄心部27を内側に位置させて一次コイル14および二次コイル23の外側を囲む環状鉄心部28とで構成されている。
なお、直線鉄心部27の一端と環状鉄心部28との間には、磁気バイアスをかける永久磁石片29が装填されている。
And the iron core part 26 has the linear iron core part 27 which penetrates the primary coil 14 and the secondary coil 23, and the cyclic | annular iron core part which positions this linear iron core part 27 inside, and surrounds the outer side of the primary coil 14 and the secondary coil 23 28.
A permanent magnet piece 29 for applying a magnetic bias is loaded between one end of the linear core portion 27 and the annular core portion 28.

次に、動作について説明する。
この内燃機関用点火コイル11の一次コイル14に所定の電圧を印加してパルス状の電流を流すことにより、二次コイル23に高電圧が発生し、この高電圧は、ダイオード24、接続ピン25、高圧端子32などを介して図示を省略した点火プラグへ供給される。
なお、一次コイル14への通電開始時に二次コイル23に誘導される高電圧はダイオード24によって点火プラグへ印加を阻止され、一次コイル14への通電終了時に二次コイル23に誘導される高電圧は、ダイオード24を介して点火プラグへ印加される。
Next, the operation will be described.
A high voltage is generated in the secondary coil 23 by applying a predetermined voltage to the primary coil 14 of the internal combustion engine ignition coil 11 and causing a pulsed current to flow. The high voltage is generated by the diode 24 and the connection pin 25. The spark plug is supplied to a spark plug (not shown) via the high voltage terminal 32 and the like.
Note that the high voltage induced in the secondary coil 23 at the start of energization of the primary coil 14 is blocked from being applied to the spark plug by the diode 24, and the high voltage induced in the secondary coil 23 at the end of energization of the primary coil 14. Is applied to the spark plug via the diode 24.

上述したように、この発明の一実施例によれば、二次コイル23を形成する巻線を巻き付ける二次コイルボビン15の側面に、ダイオード24の本体部24bを収容する収容部16を設けたので、この収容部16によってダイオード24の本体部24bの大部分が覆われる。
したがって、温度が変化しても、ダイオード24の本体部24bが絶縁樹脂33の熱応力を直接受けなくなり、ダイオード24の本体部24bが損傷する恐れがなくなる。
そして、収容部16の開口22を、二次コイル23を形成する巻線の巻き付け方向と直交させたので、すなわち、開口22を二次コイルボビン15の軸方向へ開放させたので、収容部16に本体部24bを固定させたダイオード24のリード24lに巻線の一端を予め巻き付けてその巻線を二次コイルボビン15に巻き付けても、巻線を回転させる遠心力により、ダイオード24の本体部24bが収容部16から外れ、ダイオード24の位置がずれる恐れがなくなる。
As described above, according to one embodiment of the present invention, the housing portion 16 that houses the main body portion 24b of the diode 24 is provided on the side surface of the secondary coil bobbin 15 around which the winding forming the secondary coil 23 is wound. The housing portion 16 covers most of the main body portion 24b of the diode 24.
Therefore, even if the temperature changes, the main body 24b of the diode 24 is not directly subjected to the thermal stress of the insulating resin 33, and the main body 24b of the diode 24 can be prevented from being damaged.
And since the opening 22 of the accommodating part 16 was orthogonally crossed with the winding direction of the coil | winding which forms the secondary coil 23, that is, since the opening 22 was opened to the axial direction of the secondary coil bobbin 15, Even if one end of the winding is wound in advance on the lead 24l of the diode 24 to which the body portion 24b is fixed and the winding is wound around the secondary coil bobbin 15 , the body portion 24b of the diode 24 is caused by the centrifugal force that rotates the winding. There is no possibility that the position of the diode 24 is shifted from the housing portion 16.

上記した実施例では、収容部16を二次コイルボビン15の右側面に設け、収容部16の右側面を開口させた例を示したが、収容部を二次コイルボビン15の左側面に設けたり、収容部16の上下を反転させても、同様な効果を得ることができる。   In the above-described embodiment, the storage unit 16 is provided on the right side surface of the secondary coil bobbin 15 and the right side surface of the storage unit 16 is opened, but the storage unit is provided on the left side surface of the secondary coil bobbin 15, The same effect can be obtained even when the storage unit 16 is turned upside down.

この発明の一実施例である内燃機関用点火コイルの構成を示す断面図である。It is sectional drawing which shows the structure of the ignition coil for internal combustion engines which is one Example of this invention. 図1に示した二次コイルボビンの平面図である。It is a top view of the secondary coil bobbin shown in FIG. 図2に示した二次コイルボビンの右側面図である。FIG. 3 is a right side view of the secondary coil bobbin shown in FIG. 2.

符号の説明Explanation of symbols

11 内燃機関用点火コイル
12 コイル−鉄心組立体
13 一次コイルボビン
14 一次コイル
15 二次コイルボビン
16 収容部
17 底壁部
18 左側壁部
19 前壁部
19d リード挿入溝
20 後壁部
20d リード挿入溝
21 天井壁部
21n 切欠
22 開口
23 二次コイル
24 ダイオード
24b 本体部
24l リード
25 接続ピン
26 鉄心部
27 直線鉄心部
28 環状鉄心部
29 永久磁石片
30 絶縁ケース
30s ソケット部
30h 高圧タワー部
31 一次端子
32 高圧端子
33 絶縁樹脂
DESCRIPTION OF SYMBOLS 11 Ignition coil for internal combustion engines 12 Coil-iron core assembly 13 Primary coil bobbin 14 Primary coil 15 Secondary coil bobbin 16 Housing part 17 Bottom wall part 18 Left side wall part 19 Front wall part 19d Lead insertion groove 20 Rear wall part 20d Lead insertion groove 21 Ceiling wall portion 21n Notch 22 Opening 23 Secondary coil 24 Diode 24b Body portion 24l Lead 25 Connection pin 26 Iron core portion 27 Linear core portion 28 Ring core portion 29 Permanent magnet piece 30 Insulating case 30s Socket portion 30h High voltage tower portion 31 Primary terminal 32 High voltage terminal 33 Insulating resin

Claims (1)

一次コイルへの通電開始時に二次コイルに誘導される高電圧を点火プラグへ印加するのを阻止し、前記一次コイルへの通電終了時に前記二次コイルに誘導される高電圧を前記点火プラグへ印加させるダイオードを備えた内燃機関用点火コイルにおいて、
前記二次コイルを形成する巻線を巻き付ける二次コイルボビンの側面に、前記ダイオードの本体部を収容する一面が開口した袋形状の収容部を設け
前記ダイオードの本体部を収容する前記収容部の開口を、前記二次コイルを形成する巻線の巻き付け方向と直交させた、
ことを特徴とする内燃機関用点火コイル。
The high voltage induced in the secondary coil at the start of energization of the primary coil is prevented from being applied to the spark plug, and the high voltage induced in the secondary coil at the end of energization of the primary coil is applied to the spark plug. In an internal combustion engine ignition coil having a diode to be applied,
Provided on the side surface of the secondary coil bobbin around which the winding forming the secondary coil is wound is a bag-shaped accommodation portion in which one surface accommodating the body portion of the diode is opened ,
The opening of the accommodating portion that accommodates the main body portion of the diode is orthogonal to the winding direction of the winding that forms the secondary coil ,
Ignition coil for an internal combustion engine, characterized in that.
JP2004170621A 2004-06-09 2004-06-09 Ignition coil for internal combustion engine Expired - Lifetime JP3902643B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2004170621A JP3902643B2 (en) 2004-06-09 2004-06-09 Ignition coil for internal combustion engine

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Application Number Priority Date Filing Date Title
JP2004170621A JP3902643B2 (en) 2004-06-09 2004-06-09 Ignition coil for internal combustion engine

Publications (2)

Publication Number Publication Date
JP2005351119A JP2005351119A (en) 2005-12-22
JP3902643B2 true JP3902643B2 (en) 2007-04-11

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