JPH0247019U

JPH0247019U -

Info

Publication number: JPH0247019U
Application number: JP12514188U
Authority: JP
Priority date: 1988-09-27
Filing date: 1988-09-27
Publication date: 1990-03-30

Description

[Brief explanation of drawings]

第１図は本考案に係る閉磁路型点火コイルの一
実施例を示す部分断面図、第２図は第１図の点火
コイルが適用される点火回路の一例を示す回路図
、第３図は第１図のエアギヤツプ位置および長さ
を説明する図、第４図は第３図のエアギヤツプ位
置および長さに応じた発生電圧特性図、第５図は
さらに第３図のエアギヤツプ位置および長さを説
明する図、第６図は従来の閉磁路型点火コイルの
１次コイルのインダクタンス特性図、第７図は第
６図のインダクタンス特性を有する場合の１次電
流の立下り特性図、第８図は第１図の閉磁路型点
火コイルを第２図の点火回路に適用した場合の１
次コイルのインダクタンス特性図、第９図は第８
図のインダクタンス特性を有する場合の１次電流
の立下り特性図、第１０図は点火回路の他の例を
示す回路図、第１１図は第１図の点火コイルを第
１０図の点火回路に適用した場合の１次コイルの
インダクタンス特性図、第１２図は第１図の点火
コイルを第１０図の点火回路に適用した場合の１
次電流の立下り特性図、第１３図は第１２図の１
次電流の立下り特性に対する発生電圧特性図、第
１４図は第１図の点火コイルを第２図の点火回路
に適用した場合の発生電圧特性図、第１５図は従
来の閉磁路型点火コイルを示す図、第１６図は従
来の想定される閉磁路型点火コイルを示す図であ
る。１……閉磁路型鉄心、１ａ……エアギヤツプ、
２……共通ボビン、３……１次コイル、４……２
次コイル、５……パワートランジスタ、７……コ
ンデンサ。 FIG. 1 is a partial sectional view showing an embodiment of a closed magnetic circuit type ignition coil according to the present invention, FIG. 2 is a circuit diagram showing an example of an ignition circuit to which the ignition coil of FIG. 1 is applied, and FIG. FIG. 4 is a diagram explaining the air gap position and length in FIG. 1, FIG. Figure 6 is an inductance characteristic diagram of the primary coil of a conventional closed magnetic circuit type ignition coil, Figure 7 is a falling characteristic diagram of the primary current when the inductance characteristic is as shown in Figure 6, and Figure 8 is an explanatory diagram. is 1 when the closed magnetic circuit type ignition coil shown in Fig. 1 is applied to the ignition circuit shown in Fig. 2.
The inductance characteristic diagram of the next coil, Figure 9 is
Figure 10 is a circuit diagram showing another example of the ignition circuit. Figure 11 is a diagram showing the ignition coil in Figure 1 in the ignition circuit in Figure 10. Fig. 12 shows the inductance characteristic diagram of the primary coil when the ignition coil shown in Fig. 1 is applied to the ignition circuit shown in Fig. 10.
The falling characteristic diagram of the next current, Figure 13 is 1 in Figure 12.
Figure 14 shows the generated voltage characteristics when the ignition coil in Figure 1 is applied to the ignition circuit in Figure 2. Figure 15 shows the conventional closed magnetic circuit ignition coil. FIG. 16 is a diagram showing a conventional closed magnetic circuit type ignition coil. 1...Closed magnetic circuit type iron core, 1a...Air gap,
2...Common bobbin, 3...Primary coil, 4...2
Next coil, 5... power transistor, 7... capacitor.

Claims

[Claims for Utility Model Registration] A closed magnetic circuit type iron core 1 having an air gap 1a, a primary coil 3, and a secondary coil 4, which are attached to the iron core and are connected to the primary coil and the secondary coil 4.
a common bobbin 2 for arranging and winding a secondary coil in series; an air gap of the iron core is arranged inside the primary coil, and the air gap length is set to 0.
Closed magnetic circuit ignition coil with a diameter of about 5mm.