JPH0650975Y2 - Ignition device for internal combustion engine - Google Patents
Ignition device for internal combustion engineInfo
- Publication number
- JPH0650975Y2 JPH0650975Y2 JP9282092U JP9282092U JPH0650975Y2 JP H0650975 Y2 JPH0650975 Y2 JP H0650975Y2 JP 9282092 U JP9282092 U JP 9282092U JP 9282092 U JP9282092 U JP 9282092U JP H0650975 Y2 JPH0650975 Y2 JP H0650975Y2
- Authority
- JP
- Japan
- Prior art keywords
- secondary voltage
- voltage transmission
- transmission member
- ignition
- spark plug
- 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)
- Spark Plugs (AREA)
Description
【０００１】[0001]
【産業上の利用分野】この考案は内燃機関用点火装置、
特に点火プラグに直接付けられる点火コイルの２次電圧
出力部の構造に関する。This invention relates to an ignition device for an internal combustion engine,
In particular, it relates to the structure of the secondary voltage output part of the ignition coil that is directly attached to the spark plug.
【０００２】[0002]
【従来の技術】従来の自動車用の内燃機関では、多気筒
のものでも１個の点火コイルで点火を行なっていたが、
近年の内燃機関の高性能化に伴い、それぞれの気筒に１
個づつ点火コイルを設ける、いわいる点火プラグ直付け
タイプの点火装置（以下「直付け点火装置」と呼ぶ）が
普及しつつある。2. Description of the Related Art In a conventional internal combustion engine for an automobile, even a multi-cylinder engine ignites with a single ignition coil.
With the increasing performance of internal combustion engines in recent years, one for each cylinder
A so-called ignition plug direct attachment type ignition device (hereinafter referred to as “direct attachment ignition device”) in which ignition coils are individually provided is becoming popular.
【０００３】前記直付け点火装置の構成の１例を示す図
５において、１次電圧入力部11を上部に備える点火コイ
ルのケース10の下方には、樹脂成形された外装部材を持
つ２次電圧出力部（以下「プロテクタ部」と呼ぶ）20が
挿入され、このプロテクタ部20の下方には接着剤等によ
りこれと一体化されている、点火プラグ32に接続される
プラグキャップ24が設けられている。また前記プロテク
タ部20上部には、ゴム等の材料をを円形に成形した液滴
侵入防止部材（以下「レインカバー部」と呼ぶ）22が設
けられている。In FIG. 5, which shows an example of the structure of the direct-mounted ignition device, a secondary voltage having a resin-molded exterior member is provided below a case 10 of an ignition coil having a primary voltage input portion 11 on an upper portion thereof. An output part (hereinafter referred to as “protector part”) 20 is inserted, and a plug cap 24 connected to an ignition plug 32 is provided below the protector part 20 by an adhesive or the like. There is. Further, on the upper part of the protector section 20, there is provided a droplet intrusion prevention member (hereinafter referred to as “rain cover section”) 22 formed by molding a material such as rubber into a circle.
【０００４】上記ケース10に接続されているプラグキャ
ップ24を含むプロテクタ部20は、エンジンブロック30に
設けられている、点火プラグ32の取り付け穴（プラグホ
ール）34に挿入され、前記プラグキャップ24は点火プラ
グ32に押し込まれている。前記ケース10はねじ14-14等
の固定部材によりエンジンブロックに固定され、前記レ
インカバー部22によりプラグホール34の出口を覆うこと
によりこのプラグホール34内への液滴等の侵入を防止し
ている。The protector section 20 including the plug cap 24 connected to the case 10 is inserted into a mounting hole (plug hole) 34 of the ignition plug 32 provided in the engine block 30, and the plug cap 24 is It is pushed into the spark plug 32. The case 10 is fixed to the engine block by a fixing member such as a screw 14-14, and the rain cover portion 22 covers the outlet of the plug hole 34 to prevent liquid droplets or the like from entering the plug hole 34. There is.
【０００５】前記プロテクタ部20の拡大図の１例を図３
に示す。図３において樹脂等で成形されるボディ21の内
部には、このボディ21の成形時に、図５の１次電圧入力
部11から入力される電圧を点火コイルにより昇圧した２
次電圧を伝達する、金属材料で構成される２次電圧伝達
部材26が組み込まれている（一体型）。前記２次電圧伝
達部材26は、例えば円筒形の金属棒の長手方向両端に突
出部23-23を設けているものであり、この突出部23-23の
それぞれに、前記２次電圧を伝達する、ばね等弾性部材
により構成される電圧伝達部25-25が接続され、これら
が２次コイル出力部12と点火プラグ32に接続されてい
る。An example of an enlarged view of the protector section 20 is shown in FIG.
Shown in. In the inside of the body 21 formed of resin or the like in FIG. 3, when the body 21 is formed, the voltage input from the primary voltage input unit 11 of FIG.
A secondary voltage transmission member 26 made of a metal material for transmitting the secondary voltage is incorporated (integrated type). The secondary voltage transmitting member 26 is, for example, a cylindrical metal rod provided with protrusions 23-23 at both ends in the longitudinal direction, and transmits the secondary voltage to each of the protrusions 23-23. , Voltage transmission parts 25-25 composed of elastic members such as springs are connected, and these are connected to the secondary coil output part 12 and the spark plug 32.
【０００６】第２の従来例を示す図４においては、図３
で述べた２次電圧伝達部材26はボディ21が樹脂成形され
た後、このボディ21の長手方向の中心軸上に設けられた
孔に挿入される（挿入型）。この場合電圧伝達部25は、
前記２次コイル出力部12と点火プラグ32のいずれか一方
に、換言すれば２次電圧伝達部材26の一端にのみ電圧伝
達部25を設け、他方は直接２次電圧伝達部材26を直接接
続することにより、点火プラグ32へ２次電圧の供給を行
なっている。なお図４において、上述以外の構成は図３
に示すものと同じであるため、説明は省略する。In FIG. 4 showing the second conventional example, FIG.
After the body 21 is resin-molded, the secondary voltage transmission member 26 described above is inserted into a hole provided on the central axis of the body 21 in the longitudinal direction (insertion type). In this case, the voltage transfer unit 25
Either one of the secondary coil output unit 12 and the spark plug 32, in other words, the voltage transmission unit 25 is provided only at one end of the secondary voltage transmission member 26, and the other is directly connected to the secondary voltage transmission member 26. As a result, the secondary voltage is supplied to the spark plug 32. In addition, in FIG. 4, the configuration other than the above is similar to
The description is omitted because it is the same as that shown in FIG.
【０００７】[0007]
【考案が解決しようとする課題】上述した、図３に示す
一体型のプロテクタ部20では、２次電圧伝達部材26がボ
ディ21に固定されているため、ばね等弾性のある電圧伝
達部25-25を２次電圧伝達部材26の両端に設けていなけ
れば、２次コイル出力部12と点火プラグ32の間隔が変化
した場合、この変化に対応できない。すなわち電圧伝達
部25-25が設けられていない場合には、２次コイル出力
部12と点火プラグ32の間隔が点火プラグ32の取り付け状
態等において基準値より少しでも広がった時は、この２
次コイル出力部12と点火プラグ32の少なくとも一方が２
次電圧伝達部材26と接触しなくなり、点火コイルからの
電圧を点火プラグ32に供給できなくなる。逆に２次コイ
ル出力部12と点火プラグ32の間隔が基準値より少しでも
狭まった時は、この両者間においてプロテクタ部20によ
る完全な閉切りが行なえないことにより、図５に示すレ
インカバー部22で点火プラグ取り付け穴34を覆うことが
できず、外部からの液滴が点火プラグ取り付け穴34に侵
入することがある。In the above-described integrated protector section 20 shown in FIG. 3, since the secondary voltage transmission member 26 is fixed to the body 21, the voltage transmission section 25 having elasticity such as a spring is provided. Unless 25 is provided at both ends of the secondary voltage transmission member 26, when the distance between the secondary coil output unit 12 and the ignition plug 32 changes, this change cannot be dealt with. That is, when the voltage transmission unit 25-25 is not provided, when the distance between the secondary coil output unit 12 and the spark plug 32 is wider than the reference value due to the mounting state of the spark plug 32, this 2
At least one of the secondary coil output unit 12 and the spark plug 32 is 2
The secondary voltage transmission member 26 is no longer contacted, and the voltage from the ignition coil cannot be supplied to the ignition plug 32. On the contrary, when the distance between the secondary coil output unit 12 and the spark plug 32 is narrower than the reference value, the protector unit 20 cannot completely close the gap between them, so that the rain cover unit shown in FIG. The spark plug mounting hole 34 cannot be covered with 22, and liquid droplets from the outside may enter the spark plug mounting hole 34.
【０００８】従って一体型のプロテクタ部20では、ボデ
ィ21を樹脂成形する際に２次電圧伝達部材26をこの中に
組み込むため複雑な製造工程が必要になると共に、２次
電圧伝達部材26の両端に電圧伝達部25-25を設けるた
め、価格の上昇にもつながる。Therefore, in the integral protector section 20, a complicated manufacturing process is required because the secondary voltage transmitting member 26 is incorporated therein when the body 21 is molded by resin, and both ends of the secondary voltage transmitting member 26 are required. Since the voltage transmission section 25-25 is provided in the, it will lead to the price increase.
【０００９】また図４に示す挿入型のプロテクタ部20で
は、樹脂成形されたボディ21に予め一端に電圧伝達部25
が取り付けられた２次電圧伝達部材26を挿入するため、
２次電圧伝達部材26が上下方向に移動可能であり、これ
により２次コイル出力部12と点火プラグ32の間隔が多少
変化しても１個の電圧伝達部25で常に２次コイル出力部
12と点火プラグ32の導通状態が保持できる。しかし従来
の２次電圧伝達部材26は単純な円筒形であるため、点火
コイルのケース10と一体化させる工程において２次電圧
伝達部材26がボディ21から抜け落ちてしまうといった問
題があり、またエンジン駆動中においては、この振動に
よりボディ21の中で２次電圧伝達部材26が回転し、この
まま長期間使用すれば、２次電圧伝達部材26の点火プラ
グ32または２次コイル出力部12との接続点が摩耗して、
２次電圧伝達部材26と２次コイル出力部12の導通状態を
保つことができる２次電圧伝達部材26の長さが得られな
くなることがある。In addition, in the protector portion 20 of the insertion type shown in FIG. 4, the voltage transmitting portion 25 is previously provided at one end of the resin-molded body 21.
Since the secondary voltage transmission member 26 to which is attached is inserted,
The secondary voltage transmission member 26 is movable in the vertical direction, so that even if the distance between the secondary coil output unit 12 and the spark plug 32 changes slightly, one voltage transmission unit 25 always maintains the secondary coil output unit.
The electrical connection between 12 and the spark plug 32 can be maintained. However, since the conventional secondary voltage transmission member 26 has a simple cylindrical shape, there is a problem that the secondary voltage transmission member 26 will fall out of the body 21 in the process of integrating with the case 10 of the ignition coil, and the engine drive Inside, the secondary voltage transmission member 26 rotates inside the body 21 due to this vibration, and if it is used for a long time as it is, the connection point of the secondary voltage transmission member 26 with the ignition plug 32 or the secondary coil output unit 12 Is worn,
The length of the secondary voltage transmission member 26 that can maintain the electrical connection between the secondary voltage transmission member 26 and the secondary coil output unit 12 may not be obtained.
【００１０】[0010]
【課題を解決するための手段】上記課題を解決するため
に本考案では、２次コイル出力部と点火プラグとの間に
設けられる２次電圧出力部の長手方向に同軸に２次電圧
伝達部材を挿入し、この２次電圧伝達部材の２次コイル
出力部、若しくは点火プラグとの接続部のどちらか一方
に電圧伝達部を設け、前記２次電圧伝達部材の回転、及
び抜け落ち防止のために前記２次電圧伝達部材の一部を
削り、２次電圧伝達部材挿入孔の電圧伝達部が配置され
る出口側の形状を、前記２次電圧伝達部材の一部を削っ
た形状と同形状とする。In order to solve the above-mentioned problems, according to the present invention, the secondary voltage transmitting member is coaxial with the longitudinal direction of the secondary voltage output portion provided between the secondary coil output portion and the spark plug. And a voltage transmitting portion is provided at either one of the secondary coil output portion of the secondary voltage transmitting member and the connecting portion with the spark plug to prevent the secondary voltage transmitting member from rotating and coming off. A part of the secondary voltage transmitting member is shaved, and the shape of the outlet side where the voltage transmitting portion of the secondary voltage transmitting member insertion hole is arranged is the same as the shape obtained by cutting a part of the secondary voltage transmitting member. To do.
【００１１】[0011]
【作用】上記構成により、点火コイルのケース10とプロ
テクタ部20を一体化させる工程において、２次電圧伝達
部材26がボディ21から抜け落ちることが防止でき、また
内燃機関に装着後のエンジン駆動中においても、振動に
よりボディ21の中で２次電圧伝達部材26が回転すること
が防止できるため、長期間の使用に於いても、２次電圧
伝達部材26の点火プラグ32または２次コイル出力部12と
の接続点が摩耗することなく使用できる。With the above structure, the secondary voltage transmission member 26 can be prevented from slipping off the body 21 in the step of integrating the case 10 of the ignition coil and the protector portion 20, and the engine can be driven while the engine is mounted on the internal combustion engine. Also, since it is possible to prevent the secondary voltage transmission member 26 from rotating in the body 21 due to the vibration, the spark plug 32 or the secondary coil output unit 12 of the secondary voltage transmission member 26 can be used even for a long period of use. Can be used without wear at the connection point with.
【００１２】[0012]
【実施例】本考案の実施例を図１に、このＡ−Ａ断面を
矢印方向に見た図を図２に示す。なお図１と２におい
て、従来の技術を示す図３と４で説明したものと同一、
または相当分については説明を省略する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention is shown in FIG. 1 and 2 are the same as those described in FIGS. 3 and 4 showing the prior art,
Or, the description of the corresponding portions will be omitted.
【００１３】図１と２において、プロテクタ部20の樹脂
成形されたボディ21の長手方向中心軸上に、これを貫通
するように２次電圧伝達部材26が挿入される２次電圧伝
達部材挿入孔27が設けられている。本実施例において
は、前記２次電圧伝達部材26は金属材料で形成され、円
筒形の側面の３分の１程度を削り、この削り部分の断面
を馬蹄形（Ｕ字型）としている。またボディ21若しくは
レインカバー部22の２次コイル出力部12側の出口は、前
記馬蹄形の２次電圧伝達部材26が貫通でき、かつ２次電
圧伝達部材26が回転できないような形状（馬蹄形）とし
ている。In FIGS. 1 and 2, a secondary voltage transmitting member insertion hole is formed in which a secondary voltage transmitting member 26 is inserted so as to pass through the central axis of the resin-molded body 21 of the protector portion 20 in the longitudinal direction. 27 are provided. In the present embodiment, the secondary voltage transmission member 26 is made of a metal material, and approximately one-third of the side surface of the cylindrical shape is cut, and the cut portion has a horseshoe-shaped (U-shaped) cross section. Further, the outlet of the body 21 or the rain cover portion 22 on the side of the secondary coil output portion 12 has a shape (horseshoe shape) through which the horseshoe-shaped secondary voltage transmission member 26 can penetrate and the secondary voltage transmission member 26 cannot rotate. There is.
【００１４】前記２次電圧伝達部材26は、ボディ21のプ
ラグキャップ24から馬蹄形を上にして２次電圧伝達部材
挿入孔27に挿入され、２次電圧伝達部材挿入孔27を貫通
後、突出部23に電圧伝達部25を固定しレインカバー部22
を取り付けている。The secondary voltage transmission member 26 is inserted into the secondary voltage transmission member insertion hole 27 from the plug cap 24 of the body 21 with the horseshoe shape upward, and penetrates the secondary voltage transmission member insertion hole 27, and then the protruding portion. The voltage transmitter 25 is fixed to 23, and the rain cover 22
Is attached.
【００１５】上記構成においては、２次電圧伝達部材26
の削り部分の断面は馬蹄形をしているが、これは例えば
３角形でも４角形でも２次電圧伝達部材26が回転しない
形であれば任意に選択でき、また電圧伝達部25を点火プ
ラグ32側に取り付ける場合では、ボディ21の点火プラグ
32側のみを馬蹄形、若しくはその他の形状に加工するこ
とにより同様の効果が得られる。In the above structure, the secondary voltage transmission member 26
The cross section of the shaving part has a horseshoe shape, but this can be arbitrarily selected, for example, a triangular shape or a quadrangular shape, as long as the secondary voltage transmission member 26 does not rotate, and the voltage transmission part 25 is arranged on the spark plug 32 side. When installing on the body 21, spark plug on the body 21
The same effect can be obtained by processing only the 32 side into a horseshoe shape or other shapes.
【００１６】[0016]
【考案の効果】上記構成により、点火コイルのケース10
とプロテクタ部20を一体化させる作業中に２次電圧伝達
部材26がボディ21から抜け落ちることが防止でき、また
内燃機関に装着後の長期間のエンジン駆動中において
も、振動によりボディ21の中で２次電圧伝達部材26が回
転することにより２次電圧伝達部材26の点火プラグ32ま
たは２次コイル出力部12との接続点が摩耗することが防
止できる。さらに電圧伝達部25は２次電圧伝達部材26の
どちらか一端にのみ設ければよく、低価格化が実現でき
る。[Effect of the Invention] With the above configuration, the ignition coil case 10
It is possible to prevent the secondary voltage transmission member 26 from slipping off from the body 21 during the work of integrating the protector portion 20 with the protector portion 20, and even when the engine is driven for a long period of time after being mounted on the internal combustion engine, the secondary voltage transmission member 26 inside the body 21 is vibrated due to vibration. The rotation of the secondary voltage transmission member 26 can prevent the connection point of the secondary voltage transmission member 26 with the spark plug 32 or the secondary coil output unit 12 from being worn. Furthermore, the voltage transmission unit 25 need only be provided at either one end of the secondary voltage transmission member 26, so that cost reduction can be realized.
【図１】 本考案の実施例を示すプロテクタ部の断面図
である。FIG. 1 is a sectional view of a protector portion showing an embodiment of the present invention.
【図２】 図１のプロテクタ部をＡ−Ａ断面で矢印方向
に見た図である。FIG. 2 is a view of the protector portion of FIG. 1 taken along the line AA in the direction of the arrow.
【図３】 従来のプロテクタ部の断面図である。FIG. 3 is a sectional view of a conventional protector portion.
【図４】 従来の第２のプロテクタ部の断面図である。FIG. 4 is a sectional view of a second conventional protector portion.
【図５】 点火プラグ直付けタイプの点火装置である。FIG. 5 is an ignition device of a spark plug direct mounting type.
図において同一符号は同一、または相当部分を示す。 １０ ケース １２ ２次コイル出力部 １１ １次電圧入力部 １４ ねじ ２０ ２次電圧出力部 ２１ ボディ ２２ 液滴侵入防止部材 ２３ 突出部 ２４ プラグキャップ ２５ 電圧伝達部 ２６ ２次電圧伝達部材 ２７ ２次電圧伝達部材挿入孔 ３０ エンジンブロック ３２ 点火プラグ ３４ 点火プラグ取り付け穴 In the drawings, the same reference numerals indicate the same or corresponding parts. 10 Case 12 Secondary Coil Output Section 11 Primary Voltage Input Section 14 Screw 20 Secondary Voltage Output Section 21 Body 22 Droplet Intrusion Prevention Member 23 Projection 24 Plug Cap 25 Voltage Transmission Section 26 Secondary Voltage Transmission Member 27 Secondary Voltage Transmission member insertion hole 30 Engine block 32 Spark plug 34 Spark plug mounting hole
Claims (1)
において、前記点火コイルの２次コイル出力部と点火プ
ラグとの間に２次電圧出力部が設けられ、この２次電圧
出力部の長手方向に同軸に２次電圧伝達部材を挿入し、
この２次電圧伝達部材の２次コイル出力部、若しくは点
火プラグとの接続部のどちらか一方に電圧伝達部を設
け、前記２次電圧伝達部材の回転、及び抜け落ち防止の
ために前記２次電圧伝達部材の一部を削り、２次電圧伝
達部材挿入孔の電圧伝達部が配置される出口側の形状
を、前記２次電圧伝達部材の一部を削った形状と同形状
とする内燃機関用点火装置。1. An ignition coil directly attached to an ignition plug, wherein a secondary voltage output section is provided between a secondary coil output section of the ignition coil and an ignition plug, and the secondary voltage output section is provided in a longitudinal direction of the secondary voltage output section. Insert the secondary voltage transmission member coaxially,
The secondary voltage transmission member is provided with a voltage transmission portion at either the secondary coil output portion or the connection portion with the spark plug, and the secondary voltage transmission member is provided to prevent the secondary voltage transmission member from rotating and falling off. For an internal combustion engine in which a part of the transmission member is shaved so that the shape of the outlet side where the voltage transmission portion of the secondary voltage transmission member insertion hole is arranged is the same as the shape obtained by cutting a part of the secondary voltage transmission member Ignition device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9282092U JPH0650975Y2 (en) | 1992-12-24 | 1992-12-24 | Ignition device for internal combustion engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9282092U JPH0650975Y2 (en) | 1992-12-24 | 1992-12-24 | Ignition device for internal combustion engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0652122U JPH0652122U (en) | 1994-07-15 |
| JPH0650975Y2 true JPH0650975Y2 (en) | 1994-12-21 |
Family
ID=14065072
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9282092U Expired - Lifetime JPH0650975Y2 (en) | 1992-12-24 | 1992-12-24 | Ignition device for internal combustion engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0650975Y2 (en) |
-
1992
- 1992-12-24 JP JP9282092U patent/JPH0650975Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0652122U (en) | 1994-07-15 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |