JPH0782950B2 - Ignition device for internal combustion engine - Google Patents
Ignition device for internal combustion engineInfo
- Publication number
- JPH0782950B2 JPH0782950B2 JP61204875A JP20487586A JPH0782950B2 JP H0782950 B2 JPH0782950 B2 JP H0782950B2 JP 61204875 A JP61204875 A JP 61204875A JP 20487586 A JP20487586 A JP 20487586A JP H0782950 B2 JPH0782950 B2 JP H0782950B2
- Authority
- JP
- Japan
- Prior art keywords
- ignition
- voltage terminal
- internal combustion
- combustion engine
- ignition coil
- 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
- 238000002485 combustion reaction Methods 0.000 title claims description 15
- 239000011347 resin Substances 0.000 claims description 12
- 229920005989 resin Polymers 0.000 claims description 12
- 239000002184 metal Substances 0.000 claims description 11
- 229910052751 metal Inorganic materials 0.000 claims description 11
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 6
- 230000002093 peripheral effect Effects 0.000 claims description 4
- 239000011810 insulating material Substances 0.000 claims description 2
- 239000007769 metal material Substances 0.000 claims description 2
- 230000000149 penetrating effect Effects 0.000 claims description 2
- 239000000463 material Substances 0.000 description 5
- 229910000859 α-Fe Inorganic materials 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 239000006229 carbon black Substances 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
Landscapes
- Ignition Installations For Internal Combustion Engines (AREA)
- Spark Plugs (AREA)
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装置に関し、特にその電波雑音
防止に関するものである。The present invention relates to an ignition device for an internal combustion engine, and more particularly to prevention of radio noise thereof.
従来のこの種点火装置の電波雑音防止手段としては、特
開昭51−137041号公報に、点火コイルの高圧端子と点火
プラグの端子との間に高周波域で損失の増大する磁性材
料をコアとしたインダクタを挿入した点火装置が記載さ
れている。As a conventional radio noise prevention means for this kind of ignition device, Japanese Patent Laid-Open No. 51-137041 discloses that a magnetic material having a high loss in a high frequency range between a high voltage terminal of an ignition coil and a terminal of an ignition plug is used as a core. An ignition device in which the above inductor is inserted is described.
また実開昭60−42719号公報には、高抵抗フェライトコ
アを点火コイルの鉄心と電波雑音防止用抵抗体とに共用
した点火装置が記載されている。Further, Japanese Utility Model Laid-Open No. 60-42719 discloses an ignition device in which a high resistance ferrite core is shared by the iron core of an ignition coil and a radio noise preventing resistor.
ところで、上記特開昭51−137041号公報記載の点火装置
においては電波雑音防止専用のインダクタおよびスプリ
ングを必要とするため部品点数が多くなりコストアップ
になるという問題点があった。The ignition device described in Japanese Patent Laid-Open No. 51-137041, however, has a problem in that the number of parts is increased and the cost is increased because an inductor and a spring dedicated to preventing radio noise are required.
また、実開昭60−42719号公報記載の点火装置において
は、点火コイルの中央に位置するフェライトコアが高電
圧になるため、点火コイルの耐電圧構造が困難であり、
そのため体格が大きくなるという問題点があるととも
に、鉄心に高抵抗フェライトを使用する必要があり、設
計自由度が減少するという問題点がある。Further, in the ignition device described in Japanese Utility Model Laid-Open No. 60-42719, since the ferrite core located in the center of the ignition coil has a high voltage, the withstand voltage structure of the ignition coil is difficult,
Therefore, there is a problem that the body size becomes large, and it is necessary to use a high-resistance ferrite for the iron core, which reduces the degree of freedom in design.
そこで本発明は上記問題点に鑑み、部品点数が少なく体
格の大型化や設計自由度の制約を招くことのない簡単な
構造で電波雑音防止効果を得ることができ、しかも内燃
機関用点火装置として必要な耐久性を実現できる内燃機
関用点火装置を提供することを目的とする。Therefore, in view of the above problems, the present invention can obtain the effect of preventing radio noise with a simple structure that has a small number of parts and does not restrict the size of the body and the degree of freedom in design, and further, as an ignition device for an internal combustion engine. An object of the present invention is to provide an ignition device for an internal combustion engine that can realize required durability.
本発明は上記目的を達成するために、点火コイルと、前
記点火コイルを収容した点火コイルケースと、前記点火
コイルケースの壁面を貫通して設けられた高圧ターミナ
ルと、弾性力を持った金属材料により形成され、点火プ
ラグのターミナルと前記高圧ターミナルの内部壁面との
間に介在して両者を電気的に導通させる金属ターミナル
とを備え、前記高圧ターミナルを抵抗率10〜103Ωcmの
導電性樹脂により形成したことを特徴とする内燃機関用
点火装置という技術的手段を採用する。In order to achieve the above object, the present invention provides an ignition coil, an ignition coil case housing the ignition coil, a high-voltage terminal penetrating a wall surface of the ignition coil case, and a metal material having elasticity. And a metal terminal interposed between the terminal of the spark plug and the inner wall surface of the high-voltage terminal to electrically connect the two, and the high-voltage terminal is made of a conductive resin having a resistivity of 10 to 10 3 Ωcm. The technical means of an ignition device for an internal combustion engine is adopted.
上記構成よりなる本発明によると、点火コイルで発生さ
れた高電圧は、点火コイルから高圧ターミナル、金属タ
ーミナルを経由して点火プラグのターミナルに供給さ
れ、点火プラグに点火火花を発生させる。According to the present invention having the above structure, the high voltage generated in the ignition coil is supplied from the ignition coil to the terminal of the ignition plug via the high voltage terminal and the metal terminal, and causes the ignition plug to generate an ignition spark.
このとき、点火コイルケースを貫通して設けた高圧ター
ミナルを抵抗率10〜103Ωcmの導電性樹脂により形成し
たため、この高圧ターミナルによって電波雑音の発生を
防止することができる。しかも、高圧ターミナルと点火
プラグのターミナルとの間に弾性力を持った金属ターミ
ナルが介在して両者を導通させるから、内燃機関（エン
ジン）の振動があっても高圧ターミナルと点火プラグの
ターミナルとの間の導通を維持し、しかも樹脂製の高圧
ターミナルが削られ導通不良となる恐れもない。At this time, since the high voltage terminal provided through the ignition coil case is formed of a conductive resin having a resistivity of 10 to 10 3 Ωcm, the high voltage terminal can prevent generation of radio noise. Moreover, since the metal terminal having elasticity is interposed between the high-voltage terminal and the terminal of the spark plug to conduct them, even if there is vibration of the internal combustion engine (engine), the high-voltage terminal and the terminal of the spark plug are connected. Continuity is maintained, and there is no risk of defective conduction due to the resin high-voltage terminal being scraped.
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 the embodiments shown in the drawings.
第１図は本発明になる内燃機関用点火装置の一実施例の
構成を示す要部断面図、第２図は第１図図示の本発明点
火装置における２次ボビンと高圧ターミナルの拡大模式
図であり、１は点火コイルケース、２は点火コイル、３
は１次コイル、４は２次コイルで、５は２次ボビン、８
は鉄心である。FIG. 1 is a cross-sectional view of an essential part showing the configuration of an embodiment of an ignition device for an internal combustion engine according to the present invention, and FIG. 2 is an enlarged schematic view of a secondary bobbin and a high pressure terminal in the ignition device of the present invention shown in FIG. 1 is an ignition coil case, 2 is an ignition coil, 3
Is a primary coil, 4 is a secondary coil, 5 is a secondary bobbin, and 8
Is an iron core.
上記２次ボビン５は絶縁材料よりなり、材料としてはP
A、PBT、PC、PPO等を用いる。６は第１図図示のように
点火コイルケース１を貫通して設けられた有底円筒状の
高圧ターミナルで、この高圧ターミナル６の材料として
抵抗率10〜103Ωcm程度の導電性樹脂を使用し、第１図
及び第２図図示のように、円筒状の成形品とすることに
より５〜10kΩ程度の電波雑音防止抵抗を得る。The secondary bobbin 5 is made of an insulating material, and the material is P
A, PBT, PC, PPO, etc. are used. Reference numeral 6 is a cylindrical high-voltage terminal with a bottom provided through the ignition coil case 1 as shown in FIG. 1, and a conductive resin having a resistivity of 10 to 10 3 Ωcm is used as a material for the high-voltage terminal 6. Then, as shown in FIGS. 1 and 2, by forming a cylindrical molded product, a resistance against radio noise of about 5 to 10 kΩ is obtained.
また、この高圧ターミナル６の構造は、単独成形部品と
して上記２次ボビン５に後組付けとするか、または２次
ボビン５との二層成形により一体化してもよい。７は点
火プラグ10のターミナルで、この点火プラグ10のターミ
ナル７に上記導電性樹脂の高圧ターミナル６を直接接触
させて導通をとるとエンジンの振動により高圧ターミナ
ル６の導電性樹脂が削られ、やがては導通不良なる恐れ
があるため、点火プラグ10のターミナル７と上記高圧タ
ーミナル６との間に金属ターミナル９を介在させてあ
る。この金属ターミナル９は、エンジンの振動により点
火コイルが点火プラグに力をかけないように弾性力を持
たせ、点火プラグを保護するものである。なお、金属タ
ーミナル９は、第１図に図示されるように高圧ターミナ
ル６の円筒状内周壁面と点火プラグ10のターミナル７の
外周壁面との間に介在している。なお、上記高圧ターミ
ナル６の材料として、基材にはPA、PBT等の樹脂が考え
られ、フィラーとして第３図に示すようにカーボンブラ
ックやBs,Al等の金属ファイバーを体積比で５〜10％程
度添加することにより、抵抗率10〜103Ωcm程度の導電
性樹脂が得られる。Further, the structure of the high voltage terminal 6 may be post-assembled to the secondary bobbin 5 as a single molded component, or may be integrated with the secondary bobbin 5 by two-layer molding. Reference numeral 7 is a terminal of the spark plug 10. When the high voltage terminal 6 made of the conductive resin is brought into direct contact with the terminal 7 of the spark plug 10 to establish continuity, the vibration of the engine causes the conductive resin of the high voltage terminal 6 to be scraped off. Since there is a risk of poor conduction, a metal terminal 9 is interposed between the terminal 7 of the spark plug 10 and the high voltage terminal 6. The metal terminal 9 protects the ignition plug by giving an elastic force so that the ignition coil does not exert a force on the ignition plug due to the vibration of the engine. The metal terminal 9 is interposed between the cylindrical inner peripheral wall surface of the high voltage terminal 6 and the outer peripheral wall surface of the terminal 7 of the spark plug 10 as shown in FIG. As a material for the high-voltage terminal 6, a resin such as PA or PBT can be considered as a base material, and a metal fiber such as carbon black or Bs or Al as a filler is contained in a volume ratio of 5 to 10 as shown in FIG. %, A conductive resin having a resistivity of 10 to 10 3 Ωcm can be obtained.
以上に述べたように本発明によると、点火コイルケース
を貫通して設けた高圧ターミナルを抵抗率10〜103Ωcm
の導電性樹脂により形成し、この高圧ターミナルによっ
て電波雑音の発生を防止するので、少ない部品点数で、
しかも点火装置の体格の大型化を招くことがない。しか
も高圧ターミナルを抵抗率10〜103Ωcmの導電性樹脂と
しても、点火プラグのターミナルとの接続は弾性力を持
った金属ターミナルを介してなされるため、エンジンの
振動があっても導電性樹脂が削られて導通不良となると
いった不具合が防止され、内燃機関用点火装置として必
要な耐久性を得ることができる。As described above, according to the present invention, the high voltage terminal provided through the ignition coil case has a resistivity of 10 to 10 3 Ωcm.
It is made of a conductive resin and the high voltage terminal prevents the generation of radio noise, so the number of parts is small,
Moreover, the physique of the ignition device is not increased. Moreover, even if the high-voltage terminal is made of conductive resin with a resistivity of 10 to 10 3 Ωcm, the connection with the spark plug terminal is made through a metal terminal with elastic force, so even if there is engine vibration, the conductive resin It is possible to prevent a problem such as the abrasion of the internal combustion engine resulting in poor conduction, and it is possible to obtain the durability required for the ignition device for an internal combustion engine.
第１図は本発明になる内燃機関用点火装置の一実施例の
構成を示す要部断面図、第２図は第１図図示の本発明点
火装置における２次コイルと高圧ターミナルの拡大模式
図、第３図は本発明点火装置における高圧ターミナルの
材質についての説明図である。 １…点火コイルケース、２…点火コイル、３…１次コイ
ル、４…２次コイル、５…２次ボビン、６…高圧ターミ
ナル、７…ターミナル、８…鉄心、９…金属ターミナ
ル、10…点火プラグ。FIG. 1 is a cross-sectional view of an essential part showing the configuration of an embodiment of an ignition device for an internal combustion engine according to the present invention, and FIG. 2 is an enlarged schematic view of a secondary coil and a high voltage terminal in the ignition device of the present invention shown in FIG. FIG. 3 is an explanatory view of the material of the high voltage terminal in the ignition device of the present invention. 1 ... Ignition coil case, 2 ... Ignition coil, 3 ... Primary coil, 4 ... Secondary coil, 5 ... Secondary bobbin, 6 ... High voltage terminal, 7 ... Terminal, 8 ... Iron core, 9 ... Metal terminal, 10 ... Ignition plug.
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 庁内整理番号 ＦＩ 技術表示箇所 Ｆ０２Ｐ 13/00 Ｃ Ｈ０１Ｔ 13/04 7522−5Ｇ ─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 6 Identification code Internal reference number FI technical display location F02P 13/00 C H01T 13/04 7522-5G
Claims (5)
点火コイルケースと、前記点火コイルケースの壁面を貫
通して設けられた高圧ターミナルと、弾性力を持った金
属材料により形成され、点火プラグのターミナルと前記
高圧ターミナルの内部壁面との間に介在して両者を電気
的に導通させる金属ターミナルとを備え、前記高圧ター
ミナルを抵抗率10〜103Ωcmの導電性樹脂により形成し
たことを特徴とする内燃機関用点火装置。1. An ignition coil, an ignition coil case accommodating the ignition coil, a high voltage terminal penetrating a wall surface of the ignition coil case, and an ignition plug formed of a metallic material having elasticity. And a metal terminal that electrically connects the two to the inner wall surface of the high-voltage terminal and electrically connects the two terminals, and the high-voltage terminal is formed of a conductive resin having a resistivity of 10 3 to 10 3 Ωcm. Ignition device for internal combustion engine.
されその開口端を前記点火コイルケースの外部に向けて
前記点火コイルケースの壁面を貫通して設けられている
ことを特徴とする特許請求の範囲第１項記載の内燃機関
用点火装置。2. The high voltage terminal is formed in a cylindrical shape having a bottom and is provided so as to penetrate the wall surface of the ignition coil case with its opening end facing the outside of the ignition coil case. The ignition device for an internal combustion engine according to claim 1.
絶縁材よりなるボビンに組付けられていることを特徴と
する特許請求の範囲第２項記載の内燃機関用点火装置。3. The ignition device for an internal combustion engine according to claim 2, wherein the high-voltage terminal is mounted on a bobbin made of an insulating material for the ignition coil.
ナルの外周壁面と前記高圧ターミナルの円筒状内周壁面
との間に介在することを特徴とする特許請求の範囲第２
項記載の内燃機関用点火装置。4. The metal terminal is interposed between the outer peripheral wall surface of the terminal of the ignition plug and the cylindrical inner peripheral wall surface of the high-voltage terminal.
An ignition device for an internal combustion engine according to item.
と、２次コイルとを有し、鉄心と、１次コイルと、２次
コイルとの長手方向を前記高圧ターミナルの円筒軸方向
に一致させて前記点火コイルケース内に収容されている
ことを特徴とする特許請求の範囲第１項記載の内燃機関
用点火装置。5. The ignition coil has an iron core, a primary coil, and a secondary coil, and the longitudinal direction of the iron core, the primary coil, and the secondary coil is in the cylinder axis direction of the high-voltage terminal. The ignition device for an internal combustion engine according to claim 1, wherein the ignition coil case is housed in the ignition coil case in a matched manner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61204875A JPH0782950B2 (en) | 1986-08-29 | 1986-08-29 | Ignition device for internal combustion engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61204875A JPH0782950B2 (en) | 1986-08-29 | 1986-08-29 | Ignition device for internal combustion engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6358910A JPS6358910A (en) | 1988-03-14 |
| JPH0782950B2 true JPH0782950B2 (en) | 1995-09-06 |
Family
ID=16497841
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61204875A Expired - Lifetime JPH0782950B2 (en) | 1986-08-29 | 1986-08-29 | Ignition device for internal combustion engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0782950B2 (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2525605Y2 (en) * | 1990-01-22 | 1997-02-12 | アイシン精機株式会社 | Drive plate heat treatment jig |
| JPH0544622A (en) * | 1991-08-12 | 1993-02-23 | Nippondenso Co Ltd | Ignitor of multi-cylinder internal combustion engine |
| EP0989646B1 (en) * | 1998-09-22 | 2001-03-21 | NGK Spark Plug Co. Ltd. | Spark Plug and ignition system for use with internal combustion engine |
| JP3075528B2 (en) | 1998-09-22 | 2000-08-14 | 日本特殊陶業株式会社 | Spark plug and ignition system for internal combustion engine |
| JP4845854B2 (en) * | 2007-10-31 | 2011-12-28 | 日立オートモティブシステムズ株式会社 | Ignition coil for internal combustion engine |
| US9796165B2 (en) | 2013-12-18 | 2017-10-24 | Delphi Technologies, Inc. | Ignition coil and method of assembly |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH034786Y2 (en) * | 1984-12-17 | 1991-02-07 |
-
1986
- 1986-08-29 JP JP61204875A patent/JPH0782950B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6358910A (en) | 1988-03-14 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |