JP2000199470A - Ignition device of internal combustion engine - Google Patents
Ignition device of internal combustion engineInfo
- Publication number
- JP2000199470A JP2000199470A JP10372308A JP37230898A JP2000199470A JP 2000199470 A JP2000199470 A JP 2000199470A JP 10372308 A JP10372308 A JP 10372308A JP 37230898 A JP37230898 A JP 37230898A JP 2000199470 A JP2000199470 A JP 2000199470A
- Authority
- JP
- Japan
- Prior art keywords
- ignition
- ignition coil
- coil
- internal combustion
- combustion engine
- 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.)
- Granted
Links
Landscapes
- Ignition Installations For Internal Combustion Engines (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、内燃機関の点火装
置に関し、特に、多重放電特性を得る点火装置の小型化
を図った技術に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ignition device for an internal combustion engine, and more particularly to a technology for miniaturizing an ignition device for obtaining multiple discharge characteristics.
【０００２】[0002]
【従来の技術】内燃機関の点火装置としては、点火栓の
くすぶりに対して良好な着火性能を得るためには、２次
電圧が急峻に立ち上がる特性が要求され、一方、リーン
バーンや通常の燃焼を良好に維持するためには放電時間
が長い特性が要求される。しかし、２次電圧を急峻に立
ち上げるためには点火コイルの２次巻線数を小さくする
などして短時間にエネルギを放出させるため、放電時間
は短くなるので、これら両特性の要求は相反している。2. Description of the Related Art In order to obtain good ignition performance against smoldering of an ignition plug, an ignition device for an internal combustion engine is required to have a characteristic in which a secondary voltage rises sharply. In order to maintain a good value, a characteristic requiring a long discharge time is required. However, in order to steeply raise the secondary voltage, energy is released in a short time by reducing the number of secondary windings of the ignition coil or the like, so that the discharge time is shortened. are doing.
【０００３】[0003]
【発明が解決しようとする課題】そこで、複数の点火コ
イルを用いて個々の特性を合成して多重放電とすること
により、前記２つの要求を同時に満たすことが可能であ
る。Therefore, the above two requirements can be satisfied at the same time by combining individual characteristics using a plurality of ignition coils to form a multiple discharge.
【０００４】しかし、例えば、シリンダヘッドに装着さ
れる点火栓とロッカカバー上に備えられる電極コネクタ
との間に設けられる円筒状の点火コイル（ペンシル型コ
イルと称される。特開平１０−７７９３９号公報等参
照) の場合、複数の点火コイルを円筒の径方向に重ねて
設けようとしても周辺の弁駆動機構によるスペースの制
約で外径を増大することが困難であり、また、軸方向に
重ねることも縦方向に長くなり過ぎて機関高さの制約上
困難である。また、点火栓に円筒部材（プラグチュー
ブ) を介して連結され、ロッカカバー上に配設される筐
体状の点火コイル（プラグトップ型コイルと称される。
特開平１０−２２３４６３号公報等参照) の場合も、該
点火コイルを複数設けようとすると大型化し、取付スペ
ースの確保が困難である。また、点火コイルを点火栓か
ら遠く離れた位置に設置する場合は、ハイテンションコ
ードを用いて配電することになるため、エネルギーロス
分を余分に点火コイルに出力する必要があり、高圧配電
の信頼性も懸念される。However, for example, a cylindrical ignition coil (referred to as a pencil-type coil) provided between an ignition plug mounted on a cylinder head and an electrode connector provided on a rocker cover is disclosed in Japanese Patent Application Laid-Open No. H10-77939. In such a case, it is difficult to increase the outer diameter due to space restrictions due to a peripheral valve drive mechanism even if a plurality of ignition coils are stacked in the radial direction of the cylinder. This is too long in the vertical direction, which is difficult due to restrictions on the engine height. Also, a housing-shaped ignition coil (referred to as a plug-top type coil) connected to the ignition plug via a cylindrical member (plug tube) and disposed on the rocker cover.
Also, in the case of Japanese Patent Application Laid-Open No. Hei 10-223463), if a plurality of ignition coils are provided, the size becomes large and it is difficult to secure a mounting space. If the ignition coil is installed far away from the spark plug, power is distributed using a high tension cord, so it is necessary to output extra energy loss to the ignition coil. There is also concern about the nature.
【０００５】本発明は、このような従来の課題に着目し
てなされたもので、前記相反する２つの要求を満たすこ
とができる多重放電特性を得るための２つの点火コイル
をコンパクトに配置して小型化を満たした内燃機関の点
火装置を提供することを目的とする。The present invention has been made in view of such a conventional problem, and two ignition coils for obtaining multiple discharge characteristics capable of satisfying the two conflicting requirements are compactly arranged. An object of the present invention is to provide an ignition device for an internal combustion engine satisfying miniaturization.
【０００６】[0006]
【課題を解決するための手段】このため、請求項１に係
る発明は、シリンダヘッドに装着される点火栓とロッカ
カバーとの間に円筒状の第１の点火コイルを配設すると
共に、該第１の点火コイルの上端部に連結させてロッカ
カバー上に筐体状の第２の点火コイルを配設し、これら
第１の点火コイルと第２の点火コイルとを並列に接続し
て、多重放電特性を得るように構成したことを特徴とす
る。According to the present invention, a first cylindrical ignition coil is provided between an ignition plug mounted on a cylinder head and a rocker cover. A housing-shaped second ignition coil is arranged on the rocker cover in connection with the upper end of the first ignition coil, and the first ignition coil and the second ignition coil are connected in parallel, It is characterized in that it is configured to obtain multiple discharge characteristics.
【０００７】請求項１に係る発明によると、第１の点火
コイルと第２の点火コイルとを並列に接続することで、
これら各点火コイルの各特性を合成した特性、即ち、２
次電圧が急峻に立ち上がると共に放電時間の長い多重放
電特性が得られ、点火栓のくすぶりに対して良好な着火
性能を確保できると共に、リーンバーンや通常の燃焼も
良好な性能を確保できる。そして、元々デッドスペース
となる円筒空間（プラグチューブ内空間) に第１の点火
コイルを配設し、ロッカカバー上に筐体状の第２の点火
コイルを配設するので、従来のプラグトップ型コイルを
備えた点火装置と同様の外形寸法に収めることができ、
多重放電特性を有する点火装置を可及的に小型化するこ
とができる。According to the first aspect of the present invention, by connecting the first ignition coil and the second ignition coil in parallel,
Characteristics obtained by combining the characteristics of these ignition coils, that is, 2
As the next voltage rises steeply, multiple discharge characteristics with a long discharge time can be obtained, and good ignition performance against smoldering of the spark plug can be ensured, and also good performance in lean burn and normal combustion can be ensured. The first ignition coil is disposed in the cylindrical space (the space inside the plug tube) which is originally a dead space, and the second ignition coil having a housing shape is disposed on the rocker cover. It can be stored in the same external dimensions as an ignition device with a coil,
The ignition device having the multiple discharge characteristics can be miniaturized as much as possible.
【０００８】また、請求項２に係る発明は、前記第１の
点火コイルは、第２の点火コイルに比較して２次電圧が
急峻に立ち上がる放電特性を有する一方、第２の点火コ
イルは第１の点火コイルに比較して放電時間が長い放電
特性を有し、これらを合成した２次電圧が急峻に立ち上
がり放電時間の長い多重放電特性が得られる構成とした
ことを特徴とする。According to a second aspect of the present invention, the first ignition coil has a discharge characteristic in which a secondary voltage rises sharply as compared with the second ignition coil, while the second ignition coil has a second ignition coil. It is characterized by having a discharge characteristic having a longer discharge time as compared with the first ignition coil, and a secondary voltage obtained by combining them has a sharp rise and a multiple discharge characteristic having a long discharge time is obtained.
【０００９】請求項２に係る発明によると、周辺に弁駆
動機構等を備えて外径寸法が制約される第１の点火コイ
ルに、放電エネルギーが小さくコイル外径が小さくて済
む２次電圧が急峻に立ち上がる特性を持たせ、設置スペ
ースに余裕のある筐体状の第２の点火コイルに、放電エ
ネルギーを多く必要とする放電時間が長い特性を持たせ
ることにより、各点火コイルを無理なく配設して所望の
放電特性を容易に得ることができる。According to the second aspect of the present invention, the secondary voltage, which requires a small discharge energy and a small coil outer diameter, is applied to the first ignition coil which is provided with a valve drive mechanism and the like in the periphery and whose outer diameter is restricted. By providing a characteristic that rises steeply and by giving the second ignition coil in a housing shape with ample installation space a characteristic that the discharge time requiring a large amount of discharge energy is long, each ignition coil can be easily arranged. Therefore, desired discharge characteristics can be easily obtained.
【００１０】また、請求項３に係る発明は、前記第１の
点火コイルと第２の点火コイルの２次側同士を、前記第
１の点火コイルの円筒状ケースの外周壁に外装鉄心位置
決め用に突出して形成されたリブに配設された配線を介
して接続する構成としたことを特徴とする。The invention according to claim 3 is for positioning an outer core on the outer peripheral wall of a cylindrical case of the first ignition coil by connecting the secondary sides of the first ignition coil and the second ignition coil to each other. The connection is made via a wiring provided on a rib formed so as to protrude.
【００１１】請求項３に係る発明によると、外装鉄心位
置決め用に突出して形成されたリブを利用して第１の点
火コイルと第２の点火コイルの２次側同士を接続するこ
とにより、該接続のために第１の点火コイルの外形寸法
を増大させる必要がなく、小型化の要求を容易に満たせ
る。According to the third aspect of the present invention, the secondary sides of the first ignition coil and the second ignition coil are connected to each other by using ribs protruding and formed for positioning the armor core. It is not necessary to increase the outer dimensions of the first ignition coil for connection, and the demand for miniaturization can be easily satisfied.
【００１２】また、請求項４に係る発明は、前記第１の
点火コイルと第２の点火コイルの２次側同士を、過早着
火防止用のダイオードを介して点火栓の電極に接続され
る位置で接続したことを特徴とする。According to a fourth aspect of the present invention, the secondary sides of the first ignition coil and the second ignition coil are connected to an electrode of an ignition plug via a diode for preventing premature ignition. It is characterized by being connected at a position.
【００１３】請求項４に係る発明によると、過早着火防
止用のダイオードを第１の点火コイルと第２の点火コイ
ルとに共通して１個備えるだけでよく、設置スペースを
余分に必要としなくてすむ。According to the fourth aspect of the present invention, only one diode for preventing premature ignition is required for both the first ignition coil and the second ignition coil, and an extra installation space is required. I don't have to.
【００１４】また、請求項５に係る発明は、前記第１の
点火コイル及び第２の点火コイルの１次側に接続される
各パワートランジスタを１つのパッケージに一体に装着
したことを特徴とする。The invention according to claim 5 is characterized in that each power transistor connected to the primary side of the first ignition coil and the second ignition coil is integrally mounted on one package. .
【００１５】請求項５に係る発明によると、２つのパワ
ートランジスタを１つのパッケージに一体に装着するこ
とにより、コンパクトに収納することができる。According to the fifth aspect of the present invention, the two power transistors can be compactly stored by integrally mounting them in one package.
【００１６】また、請求項６に係る発明は、前記第１の
点火コイル及び第２の点火コイルの１次側に接続される
各パワートランジスタを第２の点火コイルのケースの離
れた位置に装着したことを特徴とする。According to a sixth aspect of the present invention, each power transistor connected to the primary side of the first ignition coil and the second ignition coil is mounted at a position remote from the case of the second ignition coil. It is characterized by having done.
【００１７】請求項６に係る発明によると、パワートラ
ンジスタの発熱量が大きい場合には、各パワートランジ
スタを離して設けることにより、熱的負荷を軽減するこ
とができる。According to the sixth aspect of the present invention, when the power transistors generate a large amount of heat, the thermal load can be reduced by separately providing the power transistors.
【００１８】[0018]
【発明の実施の形態】以下に本発明の実施の形態につい
て説明する。図１は本発明の一実施の形態に係る点火装
置を備えた内燃機関の要部を示し、シリンダヘッド１の
点火栓２が装着される孔部とロッカカバー３のボス部と
の間に仕切り用の鋼管４が連結され、その内側に円筒状
の第１の点火コイル（ペンシル型コイル) ５を配設する
と共に、前記第１の点火コイル５の上端部に連結させて
ロッカカバー３上に筐体状の第２の点火コイル６（プラ
グトップ型コイル) を配設する。Embodiments of the present invention will be described below. FIG. 1 shows a main part of an internal combustion engine provided with an ignition device according to an embodiment of the present invention, in which a partition is provided between a hole of a cylinder head 1 in which a spark plug 2 is mounted and a boss of a rocker cover 3. A first tubular ignition coil (pencil-type coil) 5 is disposed inside the steel pipe 4 for use in connection with the upper end of the first ignition coil 5 so as to be mounted on the rocker cover 3. A housing-shaped second ignition coil 6 (plug-top type coil) is provided.
【００１９】図２は、前記点火装置を示し、第１の点火
コイル５は、中心側から外側にセンタコア51，２次ボビ
ン52，２次巻線53，１次ボビン54，１次巻線55，ケース
56，外装鉄心57とを備えて構成される。FIG. 2 shows the ignition device. The first ignition coil 5 includes a center core 51, a secondary bobbin 52, a secondary winding 53, a primary bobbin 54, and a primary winding 55 from the center side to the outside. ,Case
56, and an outer core 57.
【００２０】第２の点火コイル６は、図３に示すよう
に、上下に積層した鉄心61の中央部周囲に内側から外側
に１次ボビン62，１次巻線63，２次ボビン64，２次巻線
65が装着される。As shown in FIG. 3, the second ignition coil 6 includes a primary bobbin 62, a primary winding 63, and secondary bobbins 64, 2 around the center of a vertically stacked iron core 61 from inside to outside. Next winding
65 is installed.
【００２１】前記第１の点火コイル５と第２の点火コイ
ル６とが、図４に示すように並列に接続される。ここ
で、第１の点火コイル５の２次巻線53と第２の点火コイ
ル６の２次巻線65とを過早着火防止用のダイオード７を
介して点火栓２の電極に接続される位置で接続する。ま
た、この２次側同士の接続を、図２に示すように、ケー
ス56の外周壁を一部を突出して形成される外装鉄心57の
位置決め用リブ56ａに埋設した（若しくは縦溝を形成し
て該縦溝内に配設した) 配線８を介して接続する。具体
的には、前記配線８の上端部に第２の点火コイル６の２
次巻線65の一端部を接続すると共に、該配線８の下端部
に第１の点火コイル５の２次巻線53の一端部及びセンタ
コア51の下方に近接して配設された前記ダイオード７の
一方の端子を接続する。ここで、前記配線８の端部を中
央部に溝を有した２叉端子状に形成し、該溝に２次巻線
53の端部やダイオード７の端子を係止して接続するよう
な構成とすれば確実に接続することができる。前記ダイ
オード７の他方の端子はキャップ状の高圧端子９に接続
され、該高圧端子９の下端部にスプリング端子10の上端
部が嵌挿して固定される。そして、前記第１の点火コイ
ル５の下端部と連結して高圧端子９及びスプリング端子
10の外側に配設されたゴム材等からなる円筒状の緩衝部
材11に点火栓２の陽極と接続される上端部が圧入され、
スプリング端子10を押し縮めることにより、高圧端子９
及びダイオード７を介して第１の点火コイル５及び第２
の点火コイル６の各２次巻線53，65と電気的に接続され
る。The first ignition coil 5 and the second ignition coil 6 are connected in parallel as shown in FIG. Here, the secondary winding 53 of the first ignition coil 5 and the secondary winding 65 of the second ignition coil 6 are connected to the electrode of the ignition plug 2 via a diode 7 for preventing premature ignition. Connect by location. As shown in FIG. 2, the connection between the secondary sides is made by burying the outer peripheral wall of the case 56 in a positioning rib 56a of an armor core 57 formed by projecting a part (or forming a vertical groove). (Provided in the vertical groove). Specifically, the second ignition coil 6 is connected to the upper end of the wiring 8.
One end of the secondary winding 65 is connected, and the diode 7 disposed at the lower end of the wiring 8 in the vicinity of one end of the secondary winding 53 of the first ignition coil 5 and below the center core 51. Connect one terminal of Here, the end of the wiring 8 is formed in a two-forked terminal shape having a groove in the center, and a secondary winding is formed in the groove.
If the end 53 and the terminal of the diode 7 are locked and connected, the connection can be surely made. The other terminal of the diode 7 is connected to a cap-shaped high-voltage terminal 9, and the upper end of a spring terminal 10 is fitted and fixed to the lower end of the high-voltage terminal 9. The high voltage terminal 9 and the spring terminal are connected to the lower end of the first ignition coil 5.
The upper end connected to the anode of the ignition plug 2 is press-fitted into a cylindrical cushioning member 11 made of a rubber material or the like provided outside of 10, and
By compressing and retracting the spring terminal 10, the high voltage terminal 9
And the first ignition coil 5 and the second
Are electrically connected to the secondary windings 53 and 65 of the ignition coil 6.
【００２２】図３に戻って、第２の点火コイル６のケー
スと一体に、第１の点火コイル５を電源と接続するため
の第１のコネクタ12と第２の点火コイル５を電源と接続
するための第２のコネクタ13が形成され、また、ボルト
によりシリンダヘッド１に締結するための締結部14が形
成される。また、第１の点火コイル４の１次巻線55に接
続される第１のパワートランジスタ15と第２の点火コイ
ル５の１次巻線63に接続される第２のパワートランジス
タ16とを隣接して１つに収めたパッケージ17が２次巻線
65の外側に近接して配設される。これら、第１のパワー
トランジスタ15と第２のパワートランジスタ16とが、図
４に示す多重駆動回路18によって駆動され、所定の点火
時期に点火栓２が多重放電して点火が行われる。Returning to FIG. 3, the first connector 12 for connecting the first ignition coil 5 to a power supply and the second ignition coil 5 are connected to a power supply integrally with the case of the second ignition coil 6. A second connector 13 is formed, and a fastening portion 14 for fastening to the cylinder head 1 by a bolt is formed. The first power transistor 15 connected to the primary winding 55 of the first ignition coil 4 and the second power transistor 16 connected to the primary winding 63 of the second ignition coil 5 are adjacent to each other. And package 17 is the secondary winding
It is located close to the outside of 65. The first power transistor 15 and the second power transistor 16 are driven by the multiplex drive circuit 18 shown in FIG. 4, and the ignition plug 2 performs multiple discharges at a predetermined ignition timing to perform ignition.
【００２３】以上のように構成した点火装置によれば、
第１の点火コイル５と第２の点火コイル６とを並列に接
続することにより、図５に示すように、これら各点火コ
イルの特性を合成した２次電圧が急峻に立ち上がると共
に放電時間の長い多重放電特性が得られ、点火栓のくす
ぶりに対して良好な着火性能を確保できると共に、リー
ンバーンや通常の燃焼も良好な性能を確保できる。そし
て、鋼管４の内側のデッドスペースに第１の点火コイル
を配設し、ロッカカバー３上に筐体状の第２の点火コイ
ル６を配設するので、従来のプラグトップ型コイルを備
えた点火装置と同様の外形寸法に収めることができ、多
重放電特性を有する点火装置を可及的に小型化すること
ができる。According to the ignition device configured as described above,
By connecting the first ignition coil 5 and the second ignition coil 6 in parallel, as shown in FIG. 5, the secondary voltage obtained by combining the characteristics of these ignition coils rises steeply and the discharge time is long. Multiple discharge characteristics can be obtained, and good ignition performance against ignition plug smolder can be ensured, and good performance can also be obtained for lean burn and normal combustion. Since the first ignition coil is disposed in the dead space inside the steel pipe 4 and the housing-shaped second ignition coil 6 is disposed on the rocker cover 3, a conventional plug-top coil is provided. The outer dimensions can be kept the same as those of the ignition device, and the ignition device having the multiple discharge characteristics can be miniaturized as much as possible.
【００２４】特に、周辺に弁駆動機構等を備えて外径寸
法を制約される円筒状の第１の点火コイル５に放電エネ
ルギーが小さくコイル外径が小さくて済む２次電圧が急
峻に立ち上がる特性を持たせ、設置スペースに余裕のあ
る筐体状の第２の点火コイル６に放電エネルギーを多く
必要とする放電時間が長い特性を持たせることにより、
各点火コイルを無理なく配設して所望の放電特性を容易
に得ることができる。In particular, the secondary ignition voltage, which has a small discharge energy and a small coil outer diameter, is required for the first cylindrical ignition coil 5 which is provided with a valve driving mechanism and the like in the periphery and whose outer diameter is restricted. By giving the second ignition coil 6 in a housing shape having a sufficient installation space a characteristic that the discharge time requiring a large amount of discharge energy is long,
Desired discharge characteristics can be easily obtained by arranging each ignition coil without difficulty.
【００２５】また、外装鉄心位置決め用に突出して形成
されたリブ56ａを利用して第１の点火コイル５と第２の
点火コイル６の２次巻線53，65同士を接続する構成とし
たことにより、該接続のために第１の点火コイル５の外
形寸法を増大させる必要がなく、小型化の要求を容易に
満たせると同時に、該接続を過早着火防止用のダイオー
ド７を介して点火栓２の電極に接続される位置で行うこ
とにより、ダイオード７を１個共通して備えるだけでよ
く、設置スペースを余分に必要としなくてすみ、コスト
も低減できる。Further, the secondary windings 53 and 65 of the first ignition coil 5 and the second ignition coil 6 are connected to each other by using a rib 56a protruding and formed for positioning the outer core. Therefore, it is not necessary to increase the outer dimensions of the first ignition coil 5 for the connection, and it is possible to easily satisfy the demand for miniaturization, and at the same time, the connection is connected to the ignition plug via the diode 7 for preventing premature ignition. By performing the operation at the position connected to the two electrodes, only one diode 7 needs to be provided in common, so that no extra installation space is required and the cost can be reduced.
【００２６】更に、前記第１の点火コイル５及び第２の
点火コイル６の各１次巻線55，63に接続される各パワー
トランジスタ15，16を１つのパッケージ17に一体に装着
したことにより、コンパクトに収納することができる。Further, the power transistors 15, 16 connected to the primary windings 55, 63 of the first ignition coil 5 and the second ignition coil 6 are integrally mounted on one package 17. , Can be stored compactly.
【００２７】但し、各パワートランジスタの発熱量が大
きい場合は、２つのパワートランジスタを、第２の点火
コイルのケースの離れた位置、例えば、鉄心を挟んで両
側に設ける構成とすればよく、熱的負荷を軽減すること
ができる。However, if the power transistors generate a large amount of heat, the two power transistors may be provided at positions separated from the case of the second ignition coil, for example, on both sides of the iron core. Target load can be reduced.
【図１】 本発明の実施の形態に係る点火装置を備えた
内燃機関の要部を示す断面図。FIG. 1 is a sectional view showing a main part of an internal combustion engine provided with an ignition device according to an embodiment of the present invention.
【図２】 同上点火装置の詳細を示し、（Ａ) は正面
図、（Ｂ) は一部縦断面図、（Ｃ) は（Ａ) のＣ−Ｃ矢
視断面図。FIGS. 2A and 2B show details of the ignition device; FIG. 2A is a front view, FIG. 2B is a partial longitudinal sectional view, and FIG. 2C is a sectional view of FIG.
【図３】 同上点火装置の第２の点火コイルを示し、
（Ａ) は平面図、（Ｂ) は一部拡大平面図。FIG. 3 shows a second ignition coil of the ignition device,
(A) is a plan view, (B) is a partially enlarged plan view.
【図４】 同上点火装置の点火回路を示す図。FIG. 4 is a diagram showing an ignition circuit of the ignition device;
【図５】 同上点火装置の放電特性を示す図。FIG. 5 is a diagram showing discharge characteristics of the ignition device.
１ シリンダヘッド ２ 点火栓 ３ ロッカカバー ４ 鋼管 ５ 第１の点火コイル ６ 第２の点火コイル ７ ダイオード ８ 配線 15 第１のパワートランジスタ 16 第２のパワートランジスタ 17 パッケージ 53 第１の点火コイルの２次巻線 55 第２の点火コイルの１次巻線 56ａ リブ 63 第２の点火コイルの１次巻線 65 第２の点火コイルの２次巻線 Reference Signs List 1 cylinder head 2 spark plug 3 rocker cover 4 steel pipe 5 first ignition coil 6 second ignition coil 7 diode 8 wiring 15 first power transistor 16 second power transistor 17 package 53 secondary of first ignition coil Winding 55 Primary winding of second ignition coil 56a Rib 63 Primary winding of second ignition coil 65 Secondary winding of second ignition coil
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ テーマコート゛(参考） Ｈ０１Ｆ 31/00 ５０１Ｚ ──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. 7 Identification symbol FI Theme coat ゛ (Reference) H01F 31/00 501Z
Claims (6)
カカバーとの間に円筒状の第１の点火コイルを配設する
と共に、該第１の点火コイルの上端部に連結させてロッ
カカバー上に筐体状の第２の点火コイルを配設し、これ
ら第１の点火コイルと第２の点火コイルとを並列に接続
して、多重放電特性を得るように構成したことを特徴と
する内燃機関の点火装置。A first ignition coil having a cylindrical shape is provided between an ignition plug mounted on a cylinder head and a rocker cover, and is connected to an upper end of the first ignition coil so as to be mounted on the rocker cover. A housing-shaped second ignition coil, and the first ignition coil and the second ignition coil are connected in parallel to obtain a multiple discharge characteristic. Engine ignition device.
ルに比較して２次電圧が急峻に立ち上がる放電特性を有
する一方、第２の点火コイルは第１の点火コイルに比較
して放電時間が長い放電特性を有し、これらを合成した
２次電圧が急峻に立ち上がり放電時間の長い多重放電特
性が得られる構成としたことを特徴とする請求項１に記
載の内燃機関の点火装置。2. The first ignition coil has a discharge characteristic in which a secondary voltage rises sharply as compared with the second ignition coil, while the second ignition coil has a discharge characteristic as compared with the first ignition coil. 2. The ignition device for an internal combustion engine according to claim 1, wherein the ignition device has a discharge characteristic having a long discharge time, and a secondary voltage obtained by combining these discharge characteristics rises steeply to obtain a multiple discharge characteristic having a long discharge time. .
の２次側同士を、前記第１の点火コイルの円筒状ケース
の外周壁に外装鉄心位置決め用に突出して形成されたリ
ブに配設された配線を介して接続する構成としたことを
特徴とする請求項１又は請求項２に記載の内燃機関の点
火装置。3. A rib formed by projecting the secondary sides of the first ignition coil and the second ignition coil to the outer peripheral wall of a cylindrical case of the first ignition coil for positioning an outer core. 3. The ignition device for an internal combustion engine according to claim 1, wherein the ignition device is configured to be connected via a wiring provided.
の２次側同士を、過早着火防止用のダイオードを介して
点火栓の電極に接続される位置で接続したことを特徴と
する請求項１〜請求項３のいずれか１つに記載の内燃機
関の点火装置。4. A secondary battery according to claim 1, wherein the secondary sides of said first ignition coil and said second ignition coil are connected at a position where they are connected to electrodes of an ignition plug via a diode for preventing premature ignition. The ignition device for an internal combustion engine according to any one of claims 1 to 3, wherein:
ルの１次側に接続される各パワートランジスタを１つの
パッケージに一体に装着したことを特徴とする請求項１
〜請求項４のいずれか１つに記載の内燃機関の点火装
置。5. The power transistor connected to the primary side of each of the first and second ignition coils is integrally mounted on one package.
The ignition device for an internal combustion engine according to any one of claims 1 to 4.
ルの１次側に接続される各パワートランジスタを第２の
点火コイルのケースの離れた位置に装着したことを特徴
とする請求項１〜請求項４のいずれか１つに記載の内燃
機関の点火装置。6. The power transistor connected to the primary side of the first ignition coil and the second ignition coil is mounted at a position remote from the case of the second ignition coil. The ignition device for an internal combustion engine according to any one of claims 1 to 4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP37230898A JP3629995B2 (en) | 1998-12-28 | 1998-12-28 | Ignition device for internal combustion engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP37230898A JP3629995B2 (en) | 1998-12-28 | 1998-12-28 | Ignition device for internal combustion engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2000199470A true JP2000199470A (en) | 2000-07-18 |
| JP3629995B2 JP3629995B2 (en) | 2005-03-16 |
Family
ID=18500228
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP37230898A Expired - Fee Related JP3629995B2 (en) | 1998-12-28 | 1998-12-28 | Ignition device for internal combustion engine |
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| Country | Link |
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