JPS6344284B2 - - Google Patents
Info
- Publication number
- JPS6344284B2 JPS6344284B2 JP55069103A JP6910380A JPS6344284B2 JP S6344284 B2 JPS6344284 B2 JP S6344284B2 JP 55069103 A JP55069103 A JP 55069103A JP 6910380 A JP6910380 A JP 6910380A JP S6344284 B2 JPS6344284 B2 JP S6344284B2
- Authority
- JP
- Japan
- Prior art keywords
- coil
- ignition
- secondary coil
- primary
- internal combustion
- 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
Links
- 238000002485 combustion reaction Methods 0.000 claims description 14
- 238000004804 winding Methods 0.000 claims description 12
- 238000010586 diagram Methods 0.000 description 6
- 239000000203 mixture Substances 0.000 description 4
- 239000003822 epoxy resin Substances 0.000 description 3
- 229920000647 polyepoxide Polymers 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 239000011810 insulating material Substances 0.000 description 2
- 229920001707 polybutylene terephthalate Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 229920002379 silicone rubber Polymers 0.000 description 2
- 239000004945 silicone rubber Substances 0.000 description 2
- 125000006850 spacer group Chemical group 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 239000011796 hollow space material Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 1
- 239000004850 liquid epoxy resins (LERs) Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- -1 polybutylene terephthalate Polymers 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F38/00—Adaptations of transformers or inductances for specific applications or functions
- H01F38/12—Ignition, e.g. for IC engines
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Ignition Installations For Internal Combustion Engines (AREA)
Description
本発明は内燃機関用点火コイルに係り、特に、
配電器を使用せずに多気筒内燃機関の点火を行な
うことができる同時着火点火コイルに関するもの
である。
点火コイルの二次発生電圧の波高値V2は、一
般に次式で表わすことができる。
但し、Ｋ：鉄損等の補正係数
I1：一次遮断電流
L1：一次コイルのインダクタンス
ａ：巻数比
C1：一次側分布容量
C2：二次側分布容量
なお、C2は二次コイルの高圧端とアース間の
分布容量であり、これは二次コイルの構造及び二
次コイルと一次コイルおよびコア等の低電位個所
との位置関係によつて定まる。
第１図は同時着火点火コイルの回路図である。
一次コイル１と二次コイル２は絶縁されており、
二次コイル２の両端ａ，ｂはそれぞれ点火プラグ
３，４に接続されている。この点火プラグ３，４
が装着された気筒の行程と点火時期との関係は、
点火プラグ３側の気筒が圧縮行程にある時は点火
プラグ４側の気筒は排気行程となつており、二次
電圧が発生すると点火プラグ３，４に火花放電す
る。このとき点火プラグ３は混合気に点火し、点
火プラグ４で生じた火花は無駄火花となる。この
時点火プラグ３が接続されている二次コイル２の
端部ａは高電圧となり、点火プラグ４が接続され
ている二次コイル２の端部ｂは低電圧となる。
内燃機関が回転して再び二次電圧が発生した時
は、点火プラグ４側が圧縮行程となつて二次コイ
ル２の端部ｂが高電圧となり、点火プラグ３側が
排気行程となり二次コイル２の端部ａは低電圧と
なる。
このような同時着火点火コイルにおいては、二
次コイル２の両端部ａ，ｂのいずれが高電圧にな
つた場合でも、二次発生電圧を同一にするために
は二次コイル２のどちらの端から見ても二次側分
布容量C2が同一である必要がある。即ち、二次
コイル２をａ，ｂから見た場合に、一次コイル
１、コア等の低電位箇所が幾何学的に対称的な形
状となつていなければならない。
従来用いられている同時着火点火コイルは、上
記の目的を達成するために第２図の断面図に示す
ような構造となつていた。即ち、二次コイル２を
２ａ，２ｂの２つの部分に分割してボビン５に夫
夫積層巻きした後、絶縁材よりなるスペーサ６を
挾んで巻始め同志を接続して直列に連結し、１個
の二次コイル２としていた。
しかるにこのような点火コイルには次のような
欠点があつた。
(1) 二次コイル２を２個作る必要があり生産性が
低く、また、その接続部で断線し易い。
(2) 近接した２個の二次コイル２ａ，２ｂの間に
二次発生電圧が加わるため、二次コイル２間の
絶縁が著しく困難となり、例えば第２図のＡ部
で絶縁破壊が起り耐電圧性が低下し易い。ま
た、耐電圧性能の優れた点火コイルを作ろうと
すると、点火コイルが著るしく大形となる。
(3) 二次コイル２の絶縁を保つためにエポキシ樹
脂を真空注形して含浸破覆させるが、分離して
いるので樹脂の侵入が困難で二次コイル２内に
ボイドが残り易い。また、注入に時間を要し生
産能率が低い。
なお、関連する技術が、本件出願人による先願
として、特願昭53−158568号（特開昭55−86105
号参照）で出願されている。
本発明は小形で生産性が高く二次コイルのいず
れの端部が高圧端になつた場合でも二次発生電圧
がほぼ同一となる同時着火点火コイルを提供する
ことを目的とし、その特徴とするところは、コア
上に一次コイル及び二次コイルを巻装し、上記二
次コイルの両端に点火プラグを設け、内燃機関の
回転に同期して一次電流を断続して二次側に点火
用高電圧を発生する内燃機関用同時着火点火コイ
ルにおいて、上記二次コイルは、上記コアの少な
くとも一部の外周に設けられかつ複数の巻溝が形
成された分割形ボビン上に連続的に巻装されてい
ることにある。
第３図は本発明の同時着火点火コイルの一実施
例を示す断面図であり、第２図と同じ部分には同
一符号を付してある。コア９を収容した一次ボビ
ン７には一次コイル１が巻装され、その外周には
二次ボビン８が設置されている。この分割形二次
ボビン８は複数個の環状の溝１０を有し、二次コ
イル２は層間に絶縁紙を介在させることなく一方
の端部の溝１０から順番に連続して巻線されてい
る。
第４図は第３図の二次コイル２の巻線状態を模
式的に示す図で、二次ボビン８の一部を拡大断面
図として示している。二次コイル２はエナメル銅
線の端部ａを、第１の溝１０の底部から巻き初
め、最終溝１０の上部より端部ｂを引き出してい
る。この図は９個の溝１０を有する二次コイル２
を例として示しているが、第１の溝１０と第９の
溝１０における巻き数は、点火プラグが火花放電
する時に二次コイル２に印加される急峻波形電圧
による電界集中を防止するため、中間の７個の溝
１０の巻数よりも減少させている。
この二次コイル２のａ，ｂ両端部は、二次ボビ
ン８を収容したケース１１に設置された端子１
２，１３に半田付けされ、高圧ケーブル１４，１
５に接続されている。また、一次ボビン７はケー
ス１１の内部に形成した穴内に嵌入し、その接合
部を接着等の手段でシールしてケース１１に取り
付けている。なお、二次ボビン８の外周と二次端
子部１２に接続するリード線１６との間には絶縁
材よりなるスペーサ１７を挿入している。
ケース１１と一次ボビン７とで形成する中空部
にはエポキシ樹脂混合物２１を液状で真空注入し
た後、加熱硬化して一次ボビン７、二次ボビン８
および二次コイル２の端部の接続部を絶縁処理す
ると共に、これらをケース１１に固定している。
その後、一次コイル１の両端の引出し部をシリコ
ンゴムのチユーブ１８で覆い、端子部１９，２０
に半田付けする。このようにして主要部をエポキ
シ樹脂混合物２１で１体化した後、一次ボビン７
の中心にコア９を挿入し、ガラス繊維を混合した
ポリプチレンテレフタレート等の強化合成樹脂２
２で表面を被覆すると共に高圧ケーブル１４，１
５、端子部１９，２０およびコア９を一体に埋設
する。なお、コア９に形成した孔２３ａ，２３ｂ
はコア９を結合すると共に、この点火コイルを取
り付けるためのねじ等を挿入する孔である。
このように構成した同時着火点火コイルは、第
４図に示すごとく二次コイル２を１個の二次ボビ
ン８の周囲に設けた複数個の溝１０に連続して巻
装しているので、二次コイル２のいずれのコイル
端から見ても一次コイル１、コア９等の低電位個
所に対して幾何学的にほぼ対称となる。したがつ
て、二次コイル２のいずれの端部が高電圧になつ
た場合でも二次発生電圧はほぼ同じとなり、耐電
圧性が優れている。また、二次コイル２を１個の
二次ボビン８に連続巻線しているので、構造が簡
単となり生産性が向上している。更に、この点火
コイルは従来に比して20〜25％小形、軽量化して
いる等の特徴をもつている。
さて、二次コイル２の巻線状況はほぼ対称形で
あると説明してきたが、この点について更に検討
する。第４図においては９個の溝１０を有する二
次ボビン８の巻装法を示したものであるが、この
溝１０の数が少ないと二次コイル２の端部から見
た分布容量の差が大きくなり、高電圧部が交代し
たときの二次発生電圧の差が増加して同時着火点
火コイルとしての性能は低下する。
発明者等は二次ボビン８の溝１０の数を変化さ
せたものを試作して二次発生電圧を実測した。第
１表にその結果を示している。
The present invention relates to an ignition coil for an internal combustion engine, and in particular,
The present invention relates to a simultaneous ignition ignition coil that can ignite a multi-cylinder internal combustion engine without using a power distributor. The peak value V 2 of the secondary generated voltage of the ignition coil can generally be expressed by the following equation. However, K: Correction coefficient for iron loss, etc. I 1 : Primary breaking current L 1 : Primary coil inductance a: Turns ratio C 1 : Primary side distributed capacitance C 2 : Secondary side distributed capacitance Note that C 2 is the secondary coil This is the distributed capacitance between the high voltage end of the coil and the ground, and this is determined by the structure of the secondary coil and the positional relationship between the secondary coil and low potential points such as the primary coil and core. FIG. 1 is a circuit diagram of a simultaneous ignition ignition coil.
The primary coil 1 and the secondary coil 2 are insulated,
Both ends a and b of the secondary coil 2 are connected to spark plugs 3 and 4, respectively. This spark plug 3, 4
The relationship between the stroke of the cylinder equipped with the ignition timing and the ignition timing is as follows.
When the cylinder on the spark plug 3 side is in the compression stroke, the cylinder on the spark plug 4 side is in the exhaust stroke, and when a secondary voltage is generated, sparks are discharged to the spark plugs 3 and 4. At this time, the spark plug 3 ignites the air-fuel mixture, and the spark generated by the spark plug 4 becomes a wasted spark. At this point, the end a of the secondary coil 2 to which the spark plug 3 is connected becomes a high voltage, and the end b of the secondary coil 2 to which the spark plug 4 is connected becomes a low voltage. When the internal combustion engine rotates and secondary voltage is generated again, the ignition plug 4 side enters the compression stroke and the end b of the secondary coil 2 becomes high voltage, and the ignition plug 3 side enters the exhaust stroke and the secondary coil 2 The voltage at the end a is low. In such a simultaneous ignition ignition coil, even if either end a or b of the secondary coil 2 becomes high voltage, which end of the secondary coil 2 should be selected in order to make the secondary generated voltage the same. It is necessary that the secondary side distributed capacitance C 2 is the same even when viewed from above. That is, when the secondary coil 2 is viewed from a and b, the primary coil 1, core, and other low potential locations must have a geometrically symmetrical shape. A conventionally used simultaneous ignition ignition coil has a structure as shown in the sectional view of FIG. 2 in order to achieve the above object. That is, after dividing the secondary coil 2 into two parts 2a and 2b and laminatedly winding them around a bobbin 5, winding begins with a spacer 6 made of an insulating material sandwiched between them, and the parts are connected in series. There were 2 secondary coils. However, such ignition coils had the following drawbacks. (1) It is necessary to make two secondary coils 2, which results in low productivity, and the connection is likely to break. (2) Since the secondary generated voltage is applied between the two adjacent secondary coils 2a and 2b, it becomes extremely difficult to insulate the secondary coils 2, and for example, dielectric breakdown occurs at section A in Figure 2, resulting in poor durability. Voltage characteristics tend to decrease. Furthermore, if an attempt is made to make an ignition coil with excellent withstand voltage performance, the ignition coil will become significantly large. (3) In order to maintain the insulation of the secondary coil 2, epoxy resin is vacuum-cast to impregnate and rupture it, but since they are separated, it is difficult for the resin to penetrate, and voids tend to remain in the secondary coil 2. In addition, injection takes time and production efficiency is low. The related technology is disclosed in Japanese Patent Application No. 53-158568 (Japanese Unexamined Patent Publication No. 55-86105) as an earlier application by the applicant.
(See No.). An object of the present invention is to provide a simultaneous ignition ignition coil that is small in size, highly productive, and in which the secondary generated voltage is almost the same no matter which end of the secondary coil becomes a high voltage end, and the present invention is characterized by: However, by winding a primary coil and a secondary coil around the core, and installing spark plugs at both ends of the secondary coil, the primary current is intermittent in synchronization with the rotation of the internal combustion engine, and the ignition high voltage is applied to the secondary side. In a simultaneous ignition ignition coil for an internal combustion engine that generates voltage, the secondary coil is continuously wound on a split bobbin provided on the outer periphery of at least a portion of the core and in which a plurality of winding grooves are formed. It is in the fact that FIG. 3 is a sectional view showing an embodiment of the simultaneous ignition ignition coil of the present invention, and the same parts as in FIG. 2 are given the same reference numerals. A primary coil 1 is wound around a primary bobbin 7 containing a core 9, and a secondary bobbin 8 is installed around the outer periphery of the primary coil 1. This split type secondary bobbin 8 has a plurality of annular grooves 10, and the secondary coil 2 is wound continuously from the groove 10 at one end without interposing an insulating paper between the layers. There is. FIG. 4 is a diagram schematically showing the winding state of the secondary coil 2 shown in FIG. 3, and shows a part of the secondary bobbin 8 as an enlarged sectional view. The secondary coil 2 starts winding the end a of the enamelled copper wire from the bottom of the first groove 10, and draws out the end b from the top of the final groove 10. This figure shows a secondary coil 2 with nine grooves 10.
is shown as an example, the number of turns in the first groove 10 and the ninth groove 10 is determined to prevent electric field concentration due to the steep waveform voltage applied to the secondary coil 2 when the spark plug discharges a spark. The number of turns is smaller than that of the seven grooves 10 in the middle. Both ends a and b of this secondary coil 2 are connected to terminals 1 installed in a case 11 housing a secondary bobbin 8.
2, 13, high voltage cable 14, 1
5. Further, the primary bobbin 7 is fitted into a hole formed inside the case 11 and attached to the case 11 by sealing the joint portion by adhesive or other means. Note that a spacer 17 made of an insulating material is inserted between the outer periphery of the secondary bobbin 8 and the lead wire 16 connected to the secondary terminal portion 12. A liquid epoxy resin mixture 21 is vacuum injected into the hollow space formed by the case 11 and the primary bobbin 7, and then heated and hardened to form the primary bobbin 7 and the secondary bobbin 8.
The connecting portions of the ends of the secondary coil 2 are insulated and fixed to the case 11.
Thereafter, the lead-out portions at both ends of the primary coil 1 are covered with silicone rubber tubes 18, and the terminal portions 19, 20 are covered with silicone rubber tubes 18.
solder to. After integrating the main parts with the epoxy resin mixture 21 in this way, the primary bobbin 7
A reinforced synthetic resin 2 such as polybutylene terephthalate mixed with glass fiber is inserted into the center of the core 9.
2 and coat the surface with high voltage cable 14, 1.
5. Embed the terminal parts 19, 20 and the core 9 together. Note that the holes 23a and 23b formed in the core 9
A hole is used to connect the core 9 and to insert a screw or the like for attaching the ignition coil. In the simultaneous ignition ignition coil constructed in this way, the secondary coil 2 is continuously wound around a plurality of grooves 10 provided around one secondary bobbin 8, as shown in FIG. No matter which coil end of the secondary coil 2 is viewed, it is almost geometrically symmetrical with respect to the low potential parts of the primary coil 1, core 9, etc. Therefore, even when a high voltage is applied to either end of the secondary coil 2, the secondary generated voltage is approximately the same, and the voltage resistance is excellent. Further, since the secondary coil 2 is continuously wound around one secondary bobbin 8, the structure is simplified and productivity is improved. Furthermore, this ignition coil has features such as being 20 to 25% smaller and lighter than conventional ignition coils. Now, although it has been explained that the winding condition of the secondary coil 2 is almost symmetrical, this point will be further considered. FIG. 4 shows a winding method for the secondary bobbin 8 having nine grooves 10, but if the number of grooves 10 is small, there will be a difference in the distributed capacitance seen from the end of the secondary coil 2. becomes large, and the difference in secondary generated voltage when the high voltage section is replaced increases, and the performance as a simultaneous ignition ignition coil deteriorates. The inventors manufactured prototypes of secondary bobbins 8 with different numbers of grooves 10 and actually measured the secondary generated voltage. Table 1 shows the results.
【表】
即ち、第４図の二次コイル２の端部ａに近い第
１の溝１０においては溝の底部より巻き初めてお
り、端部ｂに近い第９の溝１０においては溝１０
の上部より引出していることによる二次発生電圧
に対する影響が溝数が７個以上になると僅少とな
り、二次発生電圧の差は無視できるようになる。
本実施例の同時着火点火コイルは、１体の二次
ボビンに７個以上の溝を形成して二次コイルを連
続して巻装することにより、いずれの二次コイル
端部が高電圧になつてもほぼ等しい二次発生電圧
が得られるので耐電圧性が優れており、構造が簡
単で小形、軽量化されると共に生産性が向上する
という効果が得られる。
上記実施例は２気筒の内燃機関用同時着火点火
コイルについて説明したものであるが、４気筒機
関用の同時着火点火コイルにも同様に適用でき
る。
第５図は本発明の他の実施例である４気筒内燃
機関用同時着火点火コイルの回路図である。逆方
向の電流が交互に流れるように巻装された２個の
１次コイル１ａ，１ｂと、二次コイル２に接続さ
れた４個の高圧ダイオード２４ａ，２４ｂ，２４
ｃ，２４ｄとを設け、点火プラグ２５，２６，２
７，２８にそれぞれ接続している。図より明らか
なごとく、一次コイル１の電流の方向によつて点
火プラグ２５，２７は同時に着火し、点火プラグ
２６，２８は次の時点で同時に着火する。
本実施例の同時着火点火コイルは、一次コイル
に流す電流の方向を交互に逆方向とすることによ
つて、４気筒の内燃機関用点火コイルとしても使
用でき、上記２気筒用の場合と同様の効果が得ら
れる。
本発明の内燃機関用同時着火点火コイルは、二
次コイル端のいずれの端部が高電圧になつた場合
でも二次発生電圧がほぼ等しくなつて耐電圧性が
向上している。また、構造が簡単で小形、軽量化
し生産性が優れているという効果が得られる。[Table] That is, in the first groove 10 near the end a of the secondary coil 2 in FIG. 4, the winding starts from the bottom of the groove, and in the ninth groove 10 near the end b
When the number of grooves is seven or more, the influence on the secondary generated voltage due to the extraction from the upper part of the groove becomes slight, and the difference in the secondary generated voltage becomes negligible. In the simultaneous ignition ignition coil of this embodiment, seven or more grooves are formed in a single secondary bobbin and the secondary coils are continuously wound, so that any end of the secondary coil can receive a high voltage. Since almost the same secondary generated voltage can be obtained even when the voltage is changed, the voltage resistance is excellent, and the structure is simple, compact, and lightweight, and the productivity is improved. Although the above embodiment describes a simultaneous ignition ignition coil for a two-cylinder internal combustion engine, it can be similarly applied to a simultaneous ignition ignition coil for a four-cylinder engine. FIG. 5 is a circuit diagram of a simultaneous ignition ignition coil for a four-cylinder internal combustion engine, which is another embodiment of the present invention. Two primary coils 1a, 1b are wound so that currents in opposite directions flow alternately, and four high voltage diodes 24a, 24b, 24 are connected to the secondary coil 2.
c, 24d, and spark plugs 25, 26, 2
7 and 28, respectively. As is clear from the figure, depending on the direction of the current in the primary coil 1, the spark plugs 25 and 27 are fired at the same time, and the spark plugs 26 and 28 are fired at the same time at the next time. The simultaneous ignition ignition coil of this example can also be used as an ignition coil for a four-cylinder internal combustion engine by alternating the direction of the current flowing through the primary coil in opposite directions, similar to the case for the two-cylinder engine described above. The effect of this can be obtained. The simultaneous ignition ignition coil for an internal combustion engine of the present invention has improved voltage resistance because the secondary generated voltage is approximately equal even when a high voltage is applied to either end of the secondary coil. In addition, the structure is simple, compact, lightweight, and has excellent productivity.
第１図は同時着火点火コイルの回路図、第２図
は従来の同時着火点火コイルの断面図、第３図は
本発明の同時着火点火コイルの一実施例を示す断
面図、第４図は第３図の二次コイルの巻線状態を
模式的に示す図、第５図は本発明の他の実施例で
ある４気筒内燃機関用同時着火点火コイルの回路
図である。
１……一次コイル、２……二次コイル、３，
４，２５，２６，２７，２８……点火プラグ、７
……一次ボビン、二次ボビン、９……コア、１０
……溝、１１……ケース、１２，１３……二次端
子部、１４，１５……高圧ケーブル、１９，２０
……一次端子部、２１……エポキシ樹脂混合物、
２２……ポリブチレンテレフタレート樹脂、２４
……高圧ダイオード。
FIG. 1 is a circuit diagram of a simultaneous ignition ignition coil, FIG. 2 is a sectional view of a conventional simultaneous ignition ignition coil, FIG. 3 is a sectional view showing an embodiment of the simultaneous ignition ignition coil of the present invention, and FIG. FIG. 3 is a diagram schematically showing the winding state of the secondary coil, and FIG. 5 is a circuit diagram of a simultaneous ignition ignition coil for a four-cylinder internal combustion engine, which is another embodiment of the present invention. 1...Primary coil, 2...Secondary coil, 3,
4, 25, 26, 27, 28...Spark plug, 7
...Primary bobbin, secondary bobbin, 9...Core, 10
... Groove, 11 ... Case, 12, 13 ... Secondary terminal section, 14, 15 ... High voltage cable, 19, 20
...Primary terminal part, 21...Epoxy resin mixture,
22...Polybutylene terephthalate resin, 24
...High voltage diode.
Claims (1)
し、上記二次コイルの両端に点火プラグを設け、
内燃機関の回転に同期して一次電流を断続して二
次側に点火用高電圧を発生する内燃機関用同時着
火点火コイルにおいて、上記二次コイルは、上記
コアの少なくとも一部の外周に設けられかつ複数
の巻溝が形成された分割形ボビン上に連続的に巻
装されていることを特徴とする内燃機関用同時着
火点火コイル。 ２ 特許請求の範囲第１項において、上記分割形
ボビンの巻溝は７個以上であることを特徴とする
内燃機関用同時着火点火コイル。[Claims] 1. A primary coil and a secondary coil are wound around a core, and spark plugs are provided at both ends of the secondary coil,
In a simultaneous ignition ignition coil for an internal combustion engine that generates a high voltage for ignition on a secondary side by intermittent primary current in synchronization with the rotation of the internal combustion engine, the secondary coil is provided on the outer periphery of at least a portion of the core. 1. A simultaneous ignition ignition coil for an internal combustion engine, characterized in that the coil is continuously wound on a split bobbin in which a plurality of winding grooves are formed. 2. The simultaneous ignition ignition coil for an internal combustion engine according to claim 1, wherein the split bobbin has seven or more winding grooves.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6910380A JPS56165310A (en) | 1980-05-23 | 1980-05-23 | Simultaneous firing ignition coil for internal combustion engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6910380A JPS56165310A (en) | 1980-05-23 | 1980-05-23 | Simultaneous firing ignition coil for internal combustion engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS56165310A JPS56165310A (en) | 1981-12-18 |
| JPS6344284B2 true JPS6344284B2 (en) | 1988-09-05 |
Family
ID=13392945
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6910380A Granted JPS56165310A (en) | 1980-05-23 | 1980-05-23 | Simultaneous firing ignition coil for internal combustion engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS56165310A (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59186317A (en) * | 1983-04-06 | 1984-10-23 | Nippon Denso Co Ltd | Simultaneous ignition coil |
| JPS61162032U (en) * | 1985-03-28 | 1986-10-07 | ||
| JPH06325955A (en) * | 1993-05-13 | 1994-11-25 | Hitachi Ltd | Ignition device for internal combustion engine, and ignition device mounting type distributor |
| JP2009087654A (en) * | 2007-09-28 | 2009-04-23 | Nec Lighting Ltd | Luminaire |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4735133U (en) * | 1971-05-10 | 1972-12-19 | ||
| JPS5221614A (en) * | 1975-08-13 | 1977-02-18 | Hitachi Ltd | Ignition coil |
| JPS5273246A (en) * | 1975-12-17 | 1977-06-18 | Hitachi Ltd | Molded ignition coil |
| JPS5356430A (en) * | 1976-11-01 | 1978-05-22 | Hitachi Ltd | Double ignition system ignition device |
| JPS5726346U (en) * | 1980-07-18 | 1982-02-10 | ||
| JPS5738907U (en) * | 1980-08-18 | 1982-03-02 | ||
| JPS5752899U (en) * | 1980-09-12 | 1982-03-26 | ||
| JPS6344284A (en) * | 1986-08-11 | 1988-02-25 | Canon Inc | Still picture processing method |
-
1980
- 1980-05-23 JP JP6910380A patent/JPS56165310A/en active Granted
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4735133U (en) * | 1971-05-10 | 1972-12-19 | ||
| JPS5221614A (en) * | 1975-08-13 | 1977-02-18 | Hitachi Ltd | Ignition coil |
| JPS5273246A (en) * | 1975-12-17 | 1977-06-18 | Hitachi Ltd | Molded ignition coil |
| JPS5356430A (en) * | 1976-11-01 | 1978-05-22 | Hitachi Ltd | Double ignition system ignition device |
| JPS5726346U (en) * | 1980-07-18 | 1982-02-10 | ||
| JPS5738907U (en) * | 1980-08-18 | 1982-03-02 | ||
| JPS5752899U (en) * | 1980-09-12 | 1982-03-26 | ||
| JPS6344284A (en) * | 1986-08-11 | 1988-02-25 | Canon Inc | Still picture processing method |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS56165310A (en) | 1981-12-18 |
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