WO2003071562A1 - Ignition coil for internal combustion engine - Google Patents
Ignition coil for internal combustion engine Download PDFInfo
- Publication number
- WO2003071562A1 WO2003071562A1 PCT/JP2002/001550 JP0201550W WO03071562A1 WO 2003071562 A1 WO2003071562 A1 WO 2003071562A1 JP 0201550 W JP0201550 W JP 0201550W WO 03071562 A1 WO03071562 A1 WO 03071562A1
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- WO
- WIPO (PCT)
- Prior art keywords
- coil
- bobbin
- secondary coil
- voltage side
- ignition
- Prior art date
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- 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
Definitions
- the present invention relates to an ignition coil (ignition device) for an internal combustion engine, and more particularly to a cylindrical coil suitable for being used by being directly connected to an ignition plug and housed in a plug hole of a cylinder head of the internal combustion engine. It relates to an ignition coil.
- an ignition coil for an internal combustion engine a so-called independent ignition type ignition coil which is prepared for each cylinder of the internal combustion engine and is used directly connected to a spark plug is known.
- This type of ignition coil consists of a type in which a primary coil and a secondary coil are concentrically arranged around a core that forms a magnetic path, and a type in which a primary coil is arranged in a single bobbin in the axial direction.
- a type in which a winding part and a winding part of a secondary coil are arranged is known.
- the ignition coil of the independent ignition type is housed in the plug hole of the cylinder head of the internal combustion engine and used, the space of the coil part is very narrow, and how high output is in this limited space The challenge was how to supply the ignition energy to the spark plug.
- An object of the present invention is to provide a primary bobbin with one bobbin so as to be arranged in the axial direction. It is an object of the present invention to provide an ignition coil device for an internal combustion engine, which can be reduced in size and improved in output in an independent ignition type ignition coil of a type in which a coil and a secondary coil are wound. Disclosure of the invention
- the present invention is basically configured as follows.
- An ignition coil for an internal combustion engine of an independent ignition type in which a primary coil and a secondary coil are arranged on one bobbin so as to be arranged in the axial direction, and configured as follows. ,
- the secondary coil is wound around the center of the bobbin f, and the primary coil is divided and wound on the low voltage side and the high voltage side of the secondary coil. It is characterized by.
- this type of ignition coil has a primary coil arranged in one area and a secondary coil arranged in the other area in the -axis direction of one bobbin.
- the primary coil is dividedly wound around the low voltage side and the high voltage side of the secondary coil in the axial direction of the bobbin.
- the lead wire on the low voltage side of the secondary coil is passed between the bobbin and the primary coil through a groove provided at one end of the bobbin, and thus the secondary coil is connected to one end of the bobbin. Connected to the provided terminal.
- one end outer periphery adjacent to the low voltage side of the secondary coil is defined as a low voltage side outer periphery
- one end outer periphery adjacent to the high voltage side of the secondary coil is defined as a high voltage side outer periphery.
- the primary coil is wound around the outer periphery of the bobbin on a low voltage side. Then, the lead wire at the end of winding of the primary coil in the outer periphery on the low voltage side is wrapped around the collars provided on the low voltage side and the high voltage side along the outside of the secondary coil, and the rest of the coil remains.
- the lead wire at the end of the winding of the primary coil on the outer periphery of the high voltage side again extends along the outer side of the secondary coil on the high voltage side and low side of the bobbin. It is wrapped around the collar on the voltage side to be electrically connected to the terminals. 'In this way, even if the primary coil is divided and wound on both the low voltage side and the high voltage side of the secondary coil,' the interference between both coils is eliminated and the wiring of the coil is pulled out. It can be turned around.
- the primary coil and the secondary coil are arranged side by side on one bobbin in the axial direction.
- the core is a steel plate having a cross section perpendicular to the magnetic path laminated in a D-shape, and has a closed magnetic path structure.
- the bobbin also has a cross section perpendicular to the axial direction conforming to the cross sectional shape of the core.
- the core is a closed magnetic circuit
- the bobbin fits into one of the longitudinally arranged magnetic paths (hereinafter, referred to as “magnetic path A”), and the other magnetic path (hereinafter, referred to as “magnetic path A”) is parallel to the magnetic path A.
- the magnetic path B is disposed along the outside of the primary coil and the secondary coil.
- Each of the brim portions provided on the bobbin has a part of an outer edge forming a straight line, and a side surface corresponding to the straight side of the cross section D of the magnetic path B is applied to or close to the outer edge part.
- the magnetic path B is arranged so as to perform the above.
- the entire core of the closed magnetic circuit type that can improve the output is put together in a compact as a single coil assembly together with the primary coil and secondary coil, and stored in a cylindrical case. .
- the entire closed magnetic circuit type core and the ignition drive circuit unit are accommodated in a cylindrical case accommodating the primary coil and the secondary coil.
- the bobbin is characterized in that the secondary coil is wound around a center portion, and the primary coil is dividedly wound around both ends of the bobbin so as to sandwich the secondary coil.
- FIG. 1 is a longitudinal sectional view of an ignition coil for an internal combustion engine according to a first embodiment of the present invention
- FIG. 2 is a longitudinal sectional view (A-A line sectional view) of the above embodiment
- FIG. 3 is an explanatory view schematically showing the layout of the windings of the primary coil and the secondary coil of the ignition coil according to the above-described embodiment and the drawing out structure thereof
- Fig. 5 is a longitudinal sectional view showing the coil case of the above embodiment with internal mounting parts removed
- Fig. 6 is a front view showing the disassembled state of the core used in the above embodiment.
- FIG. 7 is a partial cross-sectional view of the bobbin used in the above embodiment
- FIG. 8 is a circuit diagram of the igniter used in the above embodiment. Is a cross-sectional view showing the configuration of the ignition system, and FIG. 10 is an internal combustion engine according to a second embodiment of the present invention. Vertical 'plane. Figure of the ignition coil. BEST MODE FOR CARRYING OUT THE INVENTION
- 2 is a core for forming a magnetic path of the ignition coil
- 4 is a primary core
- 5 is a secondary coil.
- One end 4 ′ of the primary coil 4 and one end 5 ′ of the secondary coil 5 on the low voltage side are connected to a power supply terminal 9 ⁇ communicating with a battery power supply.
- the other end 4 ⁇ of the primary coil 4 is connected to a terminal 10 A of a switching circuit 105 of an ignition drive circuit unit (hereinafter referred to as “igniter” 5) 6.
- One end 5 f on the high voltage side of the secondary coil 5 is electrically connected to the ignition plug 10 via the high voltage diode 20 and the high voltage terminal 16.
- Ignition 6 is the main switching element of the primary coil: Insulated gate type bipolar transistor. Evening (hereinafter referred to as “IGBT”) '100 and sub-IGBT 101 And a current limiting circuit 109 for limiting the current flowing through the primary coil 4, a current detecting resistor 102, an ignition signal input resistor 107, a bleeder resistor 108, etc. Have been. 15
- the current detection resistor 102 is provided between the sub-IGBT 101 emitter and GND. Between the gate and collector of the IGBT 105, insert a phase direction polysilicon diode 103 composed of a polysilicon with excellent temperature characteristics, and set the primary voltage to 400 ⁇ . Clamping at 550V.
- the power supply terminal 9A (VB), GND terminal 9B, and ignition signal input terminal 9C (S) are arranged on the connector 1C of the ignition coil device (see FIGS. 1 and 4).
- the ignition coil case (hereinafter referred to as the “coil case”) 1 is made of a thermoplastic synthetic resin, such as polybutylene terephthalate (hereinafter “PBT”) or polynuenylene sulfide (hereinafter “PPS”). ) It is made by molding into a slender cylindrical shape with PPS etc.).
- PBT polybutylene terephthalate
- PPS polynuenylene sulfide
- the coil case 1 has a coil housing 1A, a spark plug connection 1D, a igniter case 1B for housing the igniter 6, and a connector 1C for external terminal connection. Molded into.
- the coil storage section 1A stores the closed magnetic circuit core 2, the primary coil 4, and the secondary coil 5.
- the igniter case 1B has, for example, a box shape, and accommodates an igniter 6 for driving an ignition coil therein.
- the core 2 of the ignition coil forms a substantially rectangular annular closed magnetic path, and its length is
- the magnetic paths A and B in the hand direction are arranged parallel to the axial direction of the coil case 1.
- the core 2 is divided into 201 and 202, and the cross-section of the core 2 perpendicular to the magnetic path has a D-shape.
- the core 2 is formed by press-stacking a silicon steel sheet or a directional silicon steel sheet having a thickness of 0.2 to 0.5 mm.
- the permanent magnet 8 is magnetized in a direction opposite to the magnetic direction excited by the primary coils 4A and 4B, and serves to prevent magnetic saturation when the primary coil is energized.
- the bobbin 3 for winding the primary coil 4 (4A, 4B) and the secondary coil 5 is made of a thermoplastic resin such as PPS or modified polyphenylene oxide (hereinafter referred to as “modified PPO”). It is molded, and its cross section perpendicular to its axial direction has a substantially D-shape along with the cross section of the core 2 (see FIGS. 3 and 6).
- modified PPO modified polyphenylene oxide
- a secondary coil 5 is wound at the center, and the secondary coil 5 uses an enameled wire having a wire diameter of about 0.03 to 0.06 mm, for a total of 100 mm. It is wound about 0 to 30000 times. This split winding is performed by dividing the winding area of the secondary coil 5 by a plurality of collars 33.
- the primary coil 4 is divided and wound on the outer periphery of both ends of the bobbin 3, that is, adjacent to the low voltage side and the high voltage side of the secondary coil 5.
- FIG. 3 schematically shows the winding mode.
- FIG. 3 (a) is a front view of the bobbin 3, (b) is a view in the direction of the arrow D, (c) is a BB sectional view, (d) is a CC sectional view, and (e) is a sectional view. It is an arrow E view.
- the outer circumference of one end adjacent to the low voltage side of the secondary coil 5 is placed on the low voltage side outer circumference 3 A and the high voltage side of the secondary coil 5.
- the outer periphery of the adjacent one end is referred to as a high voltage side outer periphery 3B.
- protrusions 37 and 38 are arranged on the end face of the flange 31 so as to face each other with a core (magnetic path) interposed therebetween.
- the protrusion 3 7 has a bracket (relay terminal; pin) for connecting one end 4 ⁇ on the power supply side of the primary coil 4 and one end 5 ′ on the low voltage side of the secondary coil 5 to the power terminal 9 A. 2 and a metal fitting (relay terminal; pin) 11 for connecting one end 4 ⁇ of the end of winding of the primary coil 4 to the terminal 1 OA of ignition 6 are insert-molded.
- the secondary coil 5 is divided and wound around the center of the bobbin 3.
- the secondary coil 5 has a lead wire 5 'on the winding start side (low voltage side) wrapped around the metal fitting (relay terminal) 12 (wrapped).
- the winding start side low voltage side
- the winding start side wrapped around the metal fitting (relay terminal) 12 (wrapped).
- it passes through the axially extending groove 41 provided on the outer circumference 3 A of one end of the bobbin 3, and It is guided to the winding area and wound.
- the grooves 41 are formed with, for example, two small gentle protrusions 300, 301 on a part of the bobbin surface in consideration of contact with the primary coil 4. By doing so, it is secured between the convex portions. Further, the depth of the groove 41 is larger than the wire diameter of the secondary coil. V-shaped cuts 3 1 3 and 3 2 3 are formed in the flanges 3 1 and 3 2 located at both ends of the groove 41 of the flanges of the bobbin 3 [Fig. b) (c)] c The bottoms of the cuts 3 1 3 and 3 2 3 communicate with the grooves 41.
- the lead wire 5 ′ of the secondary coil passes through the collar portions 31 and 32 through the cuts 3 13 and 3 23.
- the lead wire 5 ⁇ ⁇ ⁇ ⁇ on the high voltage side of the secondary coil 5 was guided to the guide groove 3 '53 3 provided in the flange 35 on the high voltage side of Bozen '3, and was provided at one end of the bobbin 3 on the high voltage side. After being bridged over the guide groove 36 1 of the flange portion 36, it is connected to the high-voltage diode 20 [FIG. 3 (b) (e)].
- the high-voltage diode 20 is held on the outer surface of the flange 36 by a support portion 39 integrally formed with the flange.
- the primary coil 4 has one end 4 'tied (wrapped) around a metal fitting (relay terminal) 12 and a notch 3 From 14, it is guided to the low voltage side outer periphery 3 A of the bobbin 3 [Fig. Thus, one winding portion 4A of the primary coil is formed. After that, the lead wire 4 A at the end of the primary coil winding in the winding part 4 A is connected to the guide groove 32 1 provided in the low voltage side flange 32 and the guide groove provided in the high voltage side flange 35. 3 5 Multiplied by 1 [Fig. 3 (a), (c), (d)].
- the lead wire 4 A ′ of the primary coil 4 is guided to the high voltage side outer periphery 3 B along the outside of the secondary coil 5 without contacting the secondary coil. Then, the remainder of the primary coil 4 is wound around the outer periphery 3B on the low voltage side as shown by reference numeral 4B.
- the lead wire 4 B ′ at the end of the primary coil winding wound around the high voltage side outer periphery 3 B is provided from the guide groove 35 2 provided in the high voltage side flange 35 to the low voltage side collar 32.
- the guide groove 3 2 2 is further extended over the guide groove 3 1 1 of the flange 3 1 at one end on the low voltage side, and is entangled with a fitting (relay terminal) 1 1 provided on the flange 3 1. Therefore, the lead wire 4 B f of the primary coil is also electrically connected to the relay terminal 1 ⁇ along the outside of the secondary coil 5 (in a non-contact state). ⁇
- the relay terminal 11 is insert-molded into a protrusion 38 provided on the flange 32 on the low voltage side of the bobbin, and the above-mentioned lead wire 4 ⁇ 'is entangled at one end thereof, and the other end 1 1 'Is connected to terminal 10 ⁇ of igniter 6 (receptor side of IGBT 100 in Fig. 8) as shown in Fig. 4.
- the lead wire 5 ′ on the low voltage side of the secondary coil 5 is connected to the bobbin 3 and the primary coil 4 via the groove 41 provided on the outer periphery of one end of the bobbin 3. (4A) and can be connected to the terminal 12 provided at one end of the bobbin.
- the groove 41 is deeper than the wire diameter of the secondary coil 5. Therefore, the lead wire 5 ′ of the secondary coil 5 can contact the winding area 3 A of the primary coil with the primary coil 4. It can be pulled out immediately.
- the lead wire 5 ′ of the secondary coil 5 does not interfere, and the disconnection of the secondary coil 5 can be prevented.
- the lead wires 4 A ′ and 45 B ′ of the split winding of the primary coil 4 are laid over the secondary coil 5, so that the secondary coil 5 has a low voltage side and a high voltage side.
- the primary coil 4 can be wound separately.
- the bobbin 3 fits into the magnetic path A in the core having a D-shaped cross section.
- the other magnetic path B parallel to the magnetic path A is arranged along the outside of the primary coil 4 (4A, 4B) and the secondary coil 5.
- the flanges 3 1, 3 2, 3 3, 3 5, 3 6 have their outer edges 3 1 ′, 3 2 ′, 3 3 ′, 3 5 ′, 3 ⁇ 6 'is cut in a straight line, and a flat surface in the magnetic path B (the side corresponding to the' straight side 'of the cross-section D in the magnetic path B) is applied to or close to the outer edge. Placed in '' Therefore, it is possible to assemble the core 2, the primary coil 4, and the secondary coil 5 into a compact 5, and the entire closed magnetic circuit can be stored in the cylindrical case 1 together with the primary coil and the secondary coil. become. '
- Inner groove 3 5 3, 3 6 1 is a projection 3 1 5, 3 2 provided beside the cut section 0 3 1 z ⁇ 3 2 ′, 3 5 ′, 3 6 ′ of the collar section 3 1, 3 2, 3 5, 3 6 5, 3, 5 5 and 3 6 2.
- the lead wires 4A ′, 4B “, 5 of the primary coil and secondary coil By passing the lead wires 4A ', 4B ", 5 of the primary coil and secondary coil through these guide grooves, the following advantages can be obtained.
- the lead wires 4 A ′ and 4 B ′ of the coil can be prevented from contacting the inner diameter of the outer diameter case 1 of the winding part of the secondary coil 5. Further, the secondary coil 5 can be prevented from contacting the outer diameter of the primary coil 4B and the inner diameter of the case 1.
- the cross section of the bobbin 1 may be elliptical.
- the bobbin 3 is disposed between the core 2 and the secondary coil 5, and also has a function of insulating high voltage generated in the secondary coil 5.
- the plurality of collars 33 for the secondary coil provided on the bobbin 3 are provided with cutouts 327 for dividing and winding the secondary coil 5.
- the ignition case 1B and the connector 1C are formed integrally with the coil case 1 but may be formed separately.
- the power supply terminal 9A, GND terminal 9B, and ignition' signal input terminal 9C are fixed to the connector section 1C by insert molding.
- Terminal 9A is connected to lower relay terminal 12 of substrate 7 (see Fig. 3 (b))
- terminal 9B is connected to ground terminal 10B of igniter 6, and terminal 9C is connected. Is connected to the signal input terminal 10 C of the ignition 6. '
- IGBT 105 is bonded to heat sink 110, and heat sink 110 is connected to heat-dissipating copper or aluminum metal plate 1 as shown in Fig. 9. Adhered to 1 2 via silicon adhesive 1 1 1.
- the ignition case 1B is provided with projections 210, 211 and mounting holes 211, 214 for mounting an ignition coil.
- Flexible epoxy is applied under vacuum between the inner periphery of bobbin 3 and the outer periphery of core 2. (E.g., 4 Torr or less), injecting and curing, or as shown in Fig. 2, covering the core 2 with a silicone rubber 230, forming a silicone rubber around the core 2, Put heat shrink tubing around core 2. This prevents electric field concentration and stress concentration between the secondary coil 5 and the core 2.
- 0-A part 1 D into which a spark plug is inserted is provided with a spring 17 which also functions as a secondary current supply function.
- the coil case 1 is provided with a plug hole seal 61 so that water does not enter the plug hole and can be ventilated when it is inserted into the plug hole.
- a primary coil 4 and a secondary coil 5 are wound around one bobbin, a secondary coil 5 is wound at the center of the bobbin, and a primary coil is dividedly wound at both ends of the low voltage side and the high voltage side.
- the coupling coefficient between the primary coil and the secondary coil can be increased, and a high-output ignition coil for an internal combustion engine can be realized in a limited space.
- the primary coil can be divided and wound on the low voltage side and high voltage side of the secondary coil without interfering with the secondary coil, making coil winding work easier and cutting the coil. Quality assurance and quality assurance.
- FIG. 10 shows another embodiment of the present invention.
- the same reference numerals as those in the first embodiment denote the same or common elements.
- the mode of the divided winding of the primary coil 4 and the divided winding of the secondary coil 5 and the overall layout of the primary coil and the secondary coil are the same as those of the above-described embodiment. It is.
- arranging the primary coils 4A and 4B on the low voltage side and the high voltage side of the secondary coil 5 in one bobbin 3 increases the coupling coefficient of the coil and increases the coil assembly. This makes it possible to increase the compactness and the storage capacity.
- the empty space of the coil case 1 is used effectively to store the signature 6.
- the connector for connecting the external terminal 'terminal' to the upper part of the coil case 1 Part 1C is formed. Also, the installation part of SIGNAY 6 is set lower than the position of connector part 1C.
- the ignition coil mounting portion 1D and the spring 17 are made shorter than in the first embodiment. According to this embodiment, the ignition coil can be made even more compact. In addition, shortening the spring 17 has the effect of suppressing the occurrence of ignition noise. Industrial applicability
- the primary coil and the secondary coil are coupled by dividing and winding the secondary coil at the center of the bobbin and the primary coil at both ends of the low voltage side and the high voltage side.
- the coefficient can be increased, and a high-output internal combustion engine ignition coil can be provided within a limited space.
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Ignition Installations For Internal Combustion Engines (AREA)
Abstract
A core forming a closed magnetic circuit and primary and secondary coils are provided in a coil case, with the primary and secondary coils disposed around a single bobbin in an axial-direction line. The secondary coil is wound at the middle of the bobbin, and the primary coil is wound divided into segments - one on the low voltage side, and the other on the high voltage side of the secondary coil. The leader line on the low voltage side of the secondary coil is passed between the bobbin and the primary coil and connected to a terminal at the bobbin’s one end. A leader line connecting windings of the primary coil is routed over the secondary coil in non-contact with it. An independent-ignition type ignition coil, having primary and secondary coils wound around one bobbin in an axial- direction line, can be reduced in sized and improved in output by the above arrangement.
Description
明細書 Specification
内燃機関用点火コィル 技術分野 Ignition coil for internal combustion engine
本発明は、 内燃機関用点火コイル (点火装置) に係り、 特に内燃 機関のシ リ ンダへッ ドのプラグホール内に収納して、 点火プラグに 直結して使用するのに適した筒形の点火コイルに関する。 背景技術 The present invention relates to an ignition coil (ignition device) for an internal combustion engine, and more particularly to a cylindrical coil suitable for being used by being directly connected to an ignition plug and housed in a plug hole of a cylinder head of the internal combustion engine. It relates to an ignition coil. Background art
内燃機関用点火コィルと して、内燃機関の各気筒ごとに用意され、 点火プラグに直結して使用される、 いわゆる独立点火型の点火コイ ルが知られている。 As an ignition coil for an internal combustion engine, a so-called independent ignition type ignition coil which is prepared for each cylinder of the internal combustion engine and is used directly connected to a spark plug is known.
この種の点火コイルは、 磁路を形成するコアの周囲に 1次コイル と 2次コイルとを同心状に配置するタイ プと、 一つのボビンに、 軸 方向に並ぶよう にして 1次コイルの卷線部と 2次コイルの卷線部を 配置するタイ プのものが知られている。 This type of ignition coil consists of a type in which a primary coil and a secondary coil are concentrically arranged around a core that forms a magnetic path, and a type in which a primary coil is arranged in a single bobbin in the axial direction. A type in which a winding part and a winding part of a secondary coil are arranged is known.
後者のタイ プとしては、 例えば、 特開平 2 — 2 3 0 9 6 4号公報 に開示されたものがある。 The latter type is disclosed, for example, in Japanese Patent Application Laid-Open No. 2-230964.
独立点火型の点火コイルは、 内燃機関のシ リ ンダへッ ドのプラグ ホール内に収納して使用するために、 コイル部のスペースが非常に 狭く、 この限られたスペースの中でいかに高出力の点火エネルギー を点火プラグに供給するかが課題となっていた。 Since the ignition coil of the independent ignition type is housed in the plug hole of the cylinder head of the internal combustion engine and used, the space of the coil part is very narrow, and how high output is in this limited space The challenge was how to supply the ignition energy to the spark plug.
本発明の目的は、 一つのボビンに、 軸方向に並ぶよう にして 1次
コイルと 2次コイルを巻線するタイ プの独立点火型の点火コイルに おいて、 小形にして出力向上を図ることができる内燃機関の点火コ ィル装置を提供することにある。 発明の開示 An object of the present invention is to provide a primary bobbin with one bobbin so as to be arranged in the axial direction. It is an object of the present invention to provide an ignition coil device for an internal combustion engine, which can be reduced in size and improved in output in an independent ignition type ignition coil of a type in which a coil and a secondary coil are wound. Disclosure of the invention
上記目的を達成するために、 本発明は基本的には次のよう に構成 する。 In order to achieve the above object, the present invention is basically configured as follows.
( 1 ) 一つのボビンに、 1次コイルと 2次コイルとを軸方向に並ぶ よう にして配置した独立点火型の内燃機関用点火コイルにおいて、 次のように構成する。 , (1) An ignition coil for an internal combustion engine of an independent ignition type in which a primary coil and a secondary coil are arranged on one bobbin so as to be arranged in the axial direction, and configured as follows. ,
すなわち、 f記ボビンの中央部に前記 2次コイルが-巻線され、 前 記 1 次コイルは、 前記 2次コィルの低電圧側と高電圧'側に'分割して 卷かれているこ とを特徴とする。 That is, the secondary coil is wound around the center of the bobbin f, and the primary coil is divided and wound on the low voltage side and the high voltage side of the secondary coil. It is characterized by.
従来のこの種タイ プの点火コイルは、 一つのボビンの-軸方向にお いて一方の領域に 1次コイルを配置し、 他方の領域に 2次コイルを 配置していた。 ' Conventionally, this type of ignition coil has a primary coil arranged in one area and a secondary coil arranged in the other area in the -axis direction of one bobbin. '
これに対して、 本発明は、 ボビンの軸方向において、 2次コイル の低電圧側と高電圧側に 1次コイルを分割巻きする。 このよう に 1 次コイルを分割巻きするこ とで、 1次コイルと 2次コイル間の結合 係数を従来よ り も高めるこ とができる。 そのために、 限られたスぺ —スの中で高出力の内燃機関用点火コイルを製作するこ とができる On the other hand, in the present invention, the primary coil is dividedly wound around the low voltage side and the high voltage side of the secondary coil in the axial direction of the bobbin. By splitting the primary coil in this way, the coupling coefficient between the primary coil and the secondary coil can be increased as compared with the conventional case. Therefore, it is possible to manufacture a high-output internal combustion engine ignition coil in a limited space.
( 2 ) 上記基本構成に付随して、 次のようなコイル配線構造も提案 する。
前記 2次コイルの低電圧側の引き出し線は、 前記ボビンの一端外 周に設けた溝を介して前記ボビンと前記 1次コイルの間を通され、 このよう にして 2次コイルをボビン一端に設けた端子に接続される よう にした。 (2) Along with the above basic configuration, the following coil wiring structure is also proposed. The lead wire on the low voltage side of the secondary coil is passed between the bobbin and the primary coil through a groove provided at one end of the bobbin, and thus the secondary coil is connected to one end of the bobbin. Connected to the provided terminal.
また、 前記ボビンのう ち前記 2次コイルの低電圧側に隣接する一 端外周を低電圧側外周、 前記 2次コィルの高電圧側に隣接する一端 外周を高電圧側外周と定義する と、 前記 1次コイルは、, 前記ボビン の低電圧側外周から卷かれるようにする。 そして、 その低電圧側外 周における 1次コイル卷き終わりの引き出し線が前記 2次コイルの 外側に沿つて低電圧側, 高電圧側に設けたつば部に掛け渡されて、 コイルの残りが前記高電圧側外周に卷かれてお り、 前記高電圧側外' 周の 1次コイル巻き終わ りの引き出し線が再び'前記 2次コィルの外 側に沿って前記ボビンの高電圧側, 低電圧側のつば部に掛け渡され て端子と電気的に接続されるようにした。 ' このよう にすれば、 1次コイルを 2次コイルの低電圧側, 高電圧 側の双方に分割巻きする場合であっても'、' 両者のコイルの干渉をな く してコイルの配線引廻しを行う こ とができる。 Further, out of the bobbin, one end outer periphery adjacent to the low voltage side of the secondary coil is defined as a low voltage side outer periphery, and one end outer periphery adjacent to the high voltage side of the secondary coil is defined as a high voltage side outer periphery. The primary coil is wound around the outer periphery of the bobbin on a low voltage side. Then, the lead wire at the end of winding of the primary coil in the outer periphery on the low voltage side is wrapped around the collars provided on the low voltage side and the high voltage side along the outside of the secondary coil, and the rest of the coil remains. It is wound around the outer periphery of the high voltage side, and the lead wire at the end of the winding of the primary coil on the outer periphery of the high voltage side again extends along the outer side of the secondary coil on the high voltage side and low side of the bobbin. It is wrapped around the collar on the voltage side to be electrically connected to the terminals. 'In this way, even if the primary coil is divided and wound on both the low voltage side and the high voltage side of the secondary coil,' the interference between both coils is eliminated and the wiring of the coil is pulled out. It can be turned around.
( 3 ) さ らに、 次のような独立点火型の内燃機関用点火コイルを提 案する。 (3) In addition, the following independent ignition type ignition coil for internal combustion engines is proposed.
前記 1次コイルと 2次コイルが一つのボビンに軸方向に並んで配 置される。 前記コアは、 磁路に垂直な断面が Dの字形に積層した鋼 板であり、 閉磁路構造をなしている。 前記ボビンも、 軸方向に垂直 な断面が前記コアの断面形状に合わせてある。 前記コアは、 閉磁路
のう ち平行配置される長手方向の磁路の一方 (以下、 「磁路 A」 と称 する) に前記ボビンが嵌合し、 且つ前記磁路 Aと平行なもう一方の 磁路 (以下、 「磁路 B」 と称する) が前記 1次コイル、 2次コイルの 外側に沿って配置される。 前記ボビンに配設される各つば部は、 そ の外縁一部が直線をなし、 この外縁一部に前記磁路 Bの前記断面 D の字の直線辺に相当する側面があてがわれ或いは近接するよう に前 記磁路 Bが配置される。 The primary coil and the secondary coil are arranged side by side on one bobbin in the axial direction. The core is a steel plate having a cross section perpendicular to the magnetic path laminated in a D-shape, and has a closed magnetic path structure. The bobbin also has a cross section perpendicular to the axial direction conforming to the cross sectional shape of the core. The core is a closed magnetic circuit The bobbin fits into one of the longitudinally arranged magnetic paths (hereinafter, referred to as “magnetic path A”), and the other magnetic path (hereinafter, referred to as “magnetic path A”) is parallel to the magnetic path A. “The magnetic path B” is disposed along the outside of the primary coil and the secondary coil. Each of the brim portions provided on the bobbin has a part of an outer edge forming a straight line, and a side surface corresponding to the straight side of the cross section D of the magnetic path B is applied to or close to the outer edge part. The magnetic path B is arranged so as to perform the above.
このようにして、 出力向上を図れる閉磁路タイ プのコア全体が前 記 1次コイル、 2次コイルと共に一つのコイル組立体としてコ ンパ ク ト にま とめられて円筒のケースに収納されている。 In this way, the entire core of the closed magnetic circuit type that can improve the output is put together in a compact as a single coil assembly together with the primary coil and secondary coil, and stored in a cylindrical case. .
' ( ) さ らに次の-ような発明を提案する。 '() We also propose the following invention.
閉磁路を形成するコアと、 前記コァの外周'一部にボビンを介して 配置される 1次コイル及び 2次コイルと、 前記 1次コイル及び 2次 コイルを駆動するための点火駆動回路ユニッ ト とを備えた内'燃機関5 用点火コイルにおいて、 前記 1次コイル, 2次コイルを収容する筒 '状のケースに前記閉磁路型のコァ全体と前記点火駆動回路ュニッ ト を収納する。また、 このボビンは、 中央部に前記 2次コイルを巻き、 前記ボビンの両端には、 前記 2次コイルを挟むよう にして前記 1次. コイルが分割巻きされていることを特徴とする。 A core forming a closed magnetic circuit, a primary coil and a secondary coil disposed on a part of the outer periphery of the core via a bobbin, and an ignition drive circuit unit for driving the primary coil and the secondary coil In the ignition coil for the internal combustion engine 5, the entire closed magnetic circuit type core and the ignition drive circuit unit are accommodated in a cylindrical case accommodating the primary coil and the secondary coil. Further, the bobbin is characterized in that the secondary coil is wound around a center portion, and the primary coil is dividedly wound around both ends of the bobbin so as to sandwich the secondary coil.
0 2次コイルの軸方向の両側に 1次コイルを配置するこ とは、 コィ ルの結合係数を高め、 コイル組立体のコンパク ト化及び収納性を高 めることができる。 そのため、 コイルケースに点火コイルの駆動回 路ュニッ ト も収納可能になる。 さらに、 この駆動回路と合わせて閉
磁路のコア全体も筒状ケースに収納することで、 コイルケース内の 部品の実装密度を高めることができる。 図面の簡単な説明 0 Placing the primary coil on both sides of the secondary coil in the axial direction increases the coupling coefficient of the coil, and can improve the compactness and storage of the coil assembly. Therefore, the drive circuit unit for the ignition coil can be stored in the coil case. In addition, close with this drive circuit. By housing the entire core of the magnetic path in the cylindrical case, the mounting density of the components in the coil case can be increased. BRIEF DESCRIPTION OF THE FIGURES
第 1図は、 本発明の第 1実施例に係る内燃機関用点火コイルの縦 断面図、 第 2図は、 上記実施例の見方を変えた縦断面図 (A— A線 断面図)、 第 3図は、 上記実施例に係る点火コイルの 1次コイル及び 2次コイルの巻き線のレイ ァゥ ト及ぴその引き出し構造を模式的に 示す説明図、 第 4図は、 上記実施例に係る点火コイルの上面図、 第 5 図は、 上記実施例のコイルケースを内部実装部品.を取り外して示 す縦断面図、 第 6図は、 上記実施例に用いるコァ.の分解状態を示す 正面図及び分解きれた各コァの端面側からみた図、 第 7図は、 上記 実施例に用いるボビンの部分拡大断面図、 第 8図は、 上記実施例に 用いるィ グナイ 夕の回路図、 第 9図は、 上記ィ グナイ夕の構成を示 す断面図、 第 1 0図は、 本発明の第 2実施例に係る内燃機関用点火 コイルの縦断'面.図。 発明を実施するための最良の形態 FIG. 1 is a longitudinal sectional view of an ignition coil for an internal combustion engine according to a first embodiment of the present invention, FIG. 2 is a longitudinal sectional view (A-A line sectional view) of the above embodiment, FIG. 3 is an explanatory view schematically showing the layout of the windings of the primary coil and the secondary coil of the ignition coil according to the above-described embodiment and the drawing out structure thereof, and FIG. Top view of the ignition coil, Fig. 5 is a longitudinal sectional view showing the coil case of the above embodiment with internal mounting parts removed, and Fig. 6 is a front view showing the disassembled state of the core used in the above embodiment. FIG. 7 is a partial cross-sectional view of the bobbin used in the above embodiment, and FIG. 8 is a circuit diagram of the igniter used in the above embodiment. Is a cross-sectional view showing the configuration of the ignition system, and FIG. 10 is an internal combustion engine according to a second embodiment of the present invention. Vertical 'plane. Figure of the ignition coil. BEST MODE FOR CARRYING OUT THE INVENTION
本発明の実施例を、 図面を用いて説明する。 Embodiments of the present invention will be described with reference to the drawings.
まず、 本実施例に係る点火コイルの構造を第 1図〜 7図によ り説 明するのに先立ち、 第 8図によ り本実施例に係る点火コイルの電気 回路について説明する。 First, prior to describing the structure of the ignition coil according to the present embodiment with reference to FIGS. 1 to 7, an electric circuit of the ignition coil according to the present embodiment will be described with reference to FIG.
図中、 2は点火コイルの磁路を形成するためのコア、 4は 1次コ
ィル、 5は 2次コイルである。 In the figure, 2 is a core for forming a magnetic path of the ignition coil, and 4 is a primary core. , 5 is a secondary coil.
1次コイル 4の一端 4 ' と 2次コイル 5の低電圧側の一端 5 ' は. バヅテ リ電源に通じる電源供給端子 9 Αと接続されている。 1次コ ィル 4の他端 4〃 は、 点火駆動回路ユニッ ト (以下、 「ィ グナイ 夕」 5 と称する) 6のスイ ッチング回路 1 0 5の端子 1 0 Aと接続されて いる。 One end 4 ′ of the primary coil 4 and one end 5 ′ of the secondary coil 5 on the low voltage side are connected to a power supply terminal 9 通 communicating with a battery power supply. The other end 4 の of the primary coil 4 is connected to a terminal 10 A of a switching circuit 105 of an ignition drive circuit unit (hereinafter referred to as “igniter” 5) 6.
2次コイル 5の高電圧側の一端 5 f は、 高電圧ダイオー ド 2 0及 び高電圧端子 1 6を介して点火プラグ 1 0 と電気的に接続されてい る。 One end 5 f on the high voltage side of the secondary coil 5 is electrically connected to the ignition plug 10 via the high voltage diode 20 and the high voltage terminal 16.
10 ィ グナイ 夕 6は、 1次コイルのスイ ッチング素子となるメイ ンの :, 絶縁ゲ一 ト形バイポーラ トランジス.夕 ('以下 「 I G B T」 -という) ' 1 0 0及びサブ · I G B T 1 0 1 と、 1次コイル 4に流れる電流を制 限するための電流制限回路 1 0 9 と、 電流検出抵抗 1 0 2、 点火信 号の入力抵抗 1 0 7、 ブリーダ抵抗 1 0 8等から構.成されている。 15 電流検出抵抗 1 0 2は、 サブ I G B T 1 0 1のェミ ツ夕と GND 間に設けられている。 I G B T 1 0 5のゲー ト とコ レクタ間には、. 温度特性に優れたポリシ リ コンで構成した相方向ポリ シ リコ ンツエ ナーダイオー ド 1 0 3を揷入し、 1次電圧を 4 0 0〜 5 5 0Vでク ランプしている。 10 Ignition 6 is the main switching element of the primary coil: Insulated gate type bipolar transistor. Evening (hereinafter referred to as “IGBT”) '100 and sub-IGBT 101 And a current limiting circuit 109 for limiting the current flowing through the primary coil 4, a current detecting resistor 102, an ignition signal input resistor 107, a bleeder resistor 108, etc. Have been. 15 The current detection resistor 102 is provided between the sub-IGBT 101 emitter and GND. Between the gate and collector of the IGBT 105, insert a phase direction polysilicon diode 103 composed of a polysilicon with excellent temperature characteristics, and set the primary voltage to 400 ~. Clamping at 550V.
0 ィ グナイ 夕 6の信号入力端子 9 c とグラウン ド( G N D )間には、 プリーダ抵抗 1 0 8を挿入し、 入力信号接続部の接点電流を 1 mA 以上とし、 端子 9 Cのめつきを S nめっきでも十分な接続信頼性が 得られるよう にしている。
上記回路構成において、 I G B T (スイ ッチング素子) 1 0 0 に よ り、 1次コイル 4 に流れる 1次電流を点火信号に基づき通電遮断 することによ り、 2次コイル 5 に点火用の高電圧が誘起される。 高電圧ダイオー ド 2 0は、 2次コイル 5で発生した高電圧を、 髙 電圧端子 1 6 , スプリ ング 1 7 (第 1図参照) を介して点火ズラグ 1 0 に供給する場合に、 過早着火を防止する役割をなす。 0 Insert a leader resistor 108 between the signal input terminal 9c of signal 6 and ground (GND), set the contact current of the input signal connection to 1 mA or more, and fix the terminal 9C Sufficient connection reliability is obtained even with Sn plating. In the above circuit configuration, the primary current flowing through the primary coil 4 is interrupted by the IGBT (switching element) 100 based on the ignition signal, so that the secondary coil 5 has a high voltage for ignition. Is induced. The high voltage diode 20 prematurely supplies the high voltage generated by the secondary coil 5 to the ignition slug 10 via the 髙 voltage terminal 16 and the spring 17 (see Fig. 1). Plays a role in preventing ignition.
電源供給端子 9 A ( V B )、 G N D端子 9 B、 点火信号入力端子 9 C ( S ) は、 点火コイル装置のコネクタ部 1 C (第 1図、 第 4図参 照) に配置される。 The power supply terminal 9A (VB), GND terminal 9B, and ignition signal input terminal 9C (S) are arranged on the connector 1C of the ignition coil device (see FIGS. 1 and 4).
こ こで、 点火コイルの構造について、 第 1 図〜第 7図によ り説明 する。 Here, the structure of the ignition coil will be described with reference to FIGS.
点火コイルのケース (以下、 「コイルケース」 'と称する) 1 は、 熱 可塑性合成樹脂、 例えば、 ポリ プチレンテレフ夕レート (以下 「 P B T」 という) や、 ポリ ヌェニレンサルファイ ド (以下 「 P P S」 という) P P S等)で細長の円筒状に成形して作られている。 The ignition coil case (hereinafter referred to as the “coil case”) 1 is made of a thermoplastic synthetic resin, such as polybutylene terephthalate (hereinafter “PBT”) or polynuenylene sulfide (hereinafter “PPS”). ) It is made by molding into a slender cylindrical shape with PPS etc.).
コイルケース 1 は、 コイル収納部 1 Aと、 点火プラグ接続部 1 D と、 ィ グナイ夕 6 を収納するためのィ グナイ タケ一ス 1 B と、 外部 端子接続用のコネクタ部 1 Cとを一体に成形してなる。 The coil case 1 has a coil housing 1A, a spark plug connection 1D, a igniter case 1B for housing the igniter 6, and a connector 1C for external terminal connection. Molded into.
コイル収納部 1 Aには、 閉磁路コア 2、 1次コイル 4、 2次コィ ル 5 が収納される。 The coil storage section 1A stores the closed magnetic circuit core 2, the primary coil 4, and the secondary coil 5.
ィ グナイ 夕ケース 1 Bは、 例えばボックス形状をなし、 その内部 に点火コイルを駆動するためのィ グナイ 夕 6 が収納される。 The igniter case 1B has, for example, a box shape, and accommodates an igniter 6 for driving an ignition coil therein.
点火コイルのコア 2 は、 略長方形の環状の閉磁路をなし、 その長
手方向の磁路 A , Bはコイルケース 1の軸方向に向いて平行に配置 されている。 また、 コア 2 は第 6図に示すよう に 2 0 1 と 2 0 2 と に分割されており、 その断面形状は、 磁路に垂直な断面が Dの字形 を呈している。 コア 2は、 板厚 0. 2 ~ 0 . 5 mmの珪素鋼板又は 方向性珪素鋼板をプレス積層してなる。 The core 2 of the ignition coil forms a substantially rectangular annular closed magnetic path, and its length is The magnetic paths A and B in the hand direction are arranged parallel to the axial direction of the coil case 1. As shown in FIG. 6, the core 2 is divided into 201 and 202, and the cross-section of the core 2 perpendicular to the magnetic path has a D-shape. The core 2 is formed by press-stacking a silicon steel sheet or a directional silicon steel sheet having a thickness of 0.2 to 0.5 mm.
分割コア 2 0 1 , 2 0 2 を一体に繋く、ことで環状の閉磁路が形成 され、 その繋ぎ目には、 永久磁石 8が介在する。 永久磁石 8は、 1 次コイル 4 A , 4 Bによ り励磁される磁気方向と逆方向に着磁され てお り、 1次コイルを通電した時の磁気飽和を防止する役割をなす。 By connecting the split cores 201 and 202 together, an annular closed magnetic path is formed, and a permanent magnet 8 is interposed at the joint. The permanent magnet 8 is magnetized in a direction opposite to the magnetic direction excited by the primary coils 4A and 4B, and serves to prevent magnetic saturation when the primary coil is energized.
1次コイル 4 .( 4 A、 4 B ) 及び 2次コイル 5 を巻くためのボビ ン 3は、 例えば P P Sや変成ポリ フエ二レンオキサイ ド (以下 「変 成 P P O」 という) 等の熱可塑性樹脂で成形されてお り、' 'その軸方 向に垂直な断面形状はコア 2の断面形状と合わせて略 Dの字形を呈 レている (第 3図及び第 6 図参照)。 The bobbin 3 for winding the primary coil 4 (4A, 4B) and the secondary coil 5 is made of a thermoplastic resin such as PPS or modified polyphenylene oxide (hereinafter referred to as “modified PPO”). It is molded, and its cross section perpendicular to its axial direction has a substantially D-shape along with the cross section of the core 2 (see FIGS. 3 and 6).
ボビン 3 には、 中央部に 2次コイル 5 が卷線されてお り、 その 2 次コイル 5は線径 0 . 0 3〜 0 . 0 6 mm程度のエナメル線を用い て、 合計 1 0 0 0 0〜 3 0 0 0 0回程度分割卷されている。 この分 割巻きは、 2次コイル 5の卷き線領域を複数の.つば部 3 3 によ り分 けることによ り行われる。 On the bobbin 3, a secondary coil 5 is wound at the center, and the secondary coil 5 uses an enameled wire having a wire diameter of about 0.03 to 0.06 mm, for a total of 100 mm. It is wound about 0 to 30000 times. This split winding is performed by dividing the winding area of the secondary coil 5 by a plurality of collars 33.
1次コイル 4は、 符号 4 A、 4 Bに示すよう に、 ボビン 3の両端 外周、 すなわち 2次コイル 5の低電圧側と高電圧側に隣接して分割 して巻かれている。 As shown by reference numerals 4A and 4B, the primary coil 4 is divided and wound on the outer periphery of both ends of the bobbin 3, that is, adjacent to the low voltage side and the high voltage side of the secondary coil 5.
この 1次コイル 4の分割卷きは、 2次コイル 5 を卷いた後に行わ
れる。 第 3図にその卷線態様を模試的に示している。 The split winding of the primary coil 4 is performed after the secondary coil 5 is wound. It is. FIG. 3 schematically shows the winding mode.
第 3図において、 (a) はボビン 3の正面図、 ( b ) はその D 方向 矢視図、 ( c ) は B— B断面図、 ( d ) は C— C断面図、 ( e ) は E方 向矢視図である。 In FIG. 3, (a) is a front view of the bobbin 3, (b) is a view in the direction of the arrow D, (c) is a BB sectional view, (d) is a CC sectional view, and (e) is a sectional view. It is an arrow E view.
第 3図 ( b ) において、 ボビン 3 に記されている矢印は 1次コィ ル 4の卷線経路である。 In Fig. 3 (b), the arrow marked on bobbin 3 is the winding path of primary coil 4.
ここで、 1次コイル 4が分割卷きされるボビン両端外周のう ち、 2次コイル 5 の低電圧側に隣接する一端外周を低電圧側外周 3 A、 2次コイル 5の高電圧側に隣接する一端外周を高電圧側外周 3 B と する。 Here, of the outer circumferences of both ends of the bobbin around which the primary coil 4 is divided and wound, the outer circumference of one end adjacent to the low voltage side of the secondary coil 5 is placed on the low voltage side outer circumference 3 A and the high voltage side of the secondary coil 5. The outer periphery of the adjacent one end is referred to as a high voltage side outer periphery 3B.
また、 ボビン 3の低電圧側の最端に形成されるつば部 3 1 に'は、 その端面に突起' 3 7及び 3 8がコア' (磁路) を挟んで対向配置され ている。 In the flange 31 formed at the lowermost end of the bobbin 3 on the low-voltage side, protrusions 37 and 38 are arranged on the end face of the flange 31 so as to face each other with a core (magnetic path) interposed therebetween.
突起 3 7 には、 1次コイル 4の電源供給側の一端 4 < および 2次 コイル 5の低電圧側の一端 5 ' を電源端子 9 Aに接続するための金 具 (中継端子; ピン) 1 2 と、 1 次コイル 4の:卷ぎ終わり の一端 4〃 をィ グナイ 夕 6の端子 1 O Aに接続するための金具 (中継端子 ; ピ ン) 1 1 がイ ンサー ト成形されている。 The protrusion 3 7 has a bracket (relay terminal; pin) for connecting one end 4 <on the power supply side of the primary coil 4 and one end 5 ′ on the low voltage side of the secondary coil 5 to the power terminal 9 A. 2 and a metal fitting (relay terminal; pin) 11 for connecting one end 4〃 of the end of winding of the primary coil 4 to the terminal 1 OA of ignition 6 are insert-molded.
まず、 1次コイル 4に先だって 2次コイル 5 がボビン 3の中央部 に分割巻きされる。 2次コイル 5は、 第 3図 ( a ) , ( b ) に示すよ うに、 その卷き始め側 (低電圧側) の引き出し線 5 ' が金具 (中継 端子) 1 2 に絡げ (巻き付け) られる。 その後、 ボビン 3の一端外 周 3 Aに設けた軸方向に延びる溝 4 1の中を通り、 2次コイル 5の
卷線領域に案内され、 卷線される。 First, before the primary coil 4, the secondary coil 5 is divided and wound around the center of the bobbin 3. As shown in Figs. 3 (a) and (b), the secondary coil 5 has a lead wire 5 'on the winding start side (low voltage side) wrapped around the metal fitting (relay terminal) 12 (wrapped). Can be After that, it passes through the axially extending groove 41 provided on the outer circumference 3 A of one end of the bobbin 3, and It is guided to the winding area and wound.
溝 4 1は、 1次コイル 4 との接触を配慮して、 第 7図に示すよう に、例えばボビン表面の一部に微小な 2条のなだらかな凸部 3 0 0 , 3 0 1を形成するこ とでその凸部間に確保される。 また、 溝 4 1の 深さは、 2次コイルの線径よ り大き く してある。 ボビン 3のつば部 のう ち、 溝 4 1の両端に配置されているつば部 3 1、 3 2には、 V 字形の切り込み 3 1 3、 3 2 3が形成されている〔第 3図(b ) ( c )〕c この切り込み 3 1 3 , 3 2 3の底部が溝 4 1に連通する。 2次コィ ルの引き出し線 5 ' は、 この切り込み 3 1 3、 3 2 3を介してつば 部 3 1及びつば部 3 2を通すようにしてある。 As shown in Fig. 7, the grooves 41 are formed with, for example, two small gentle protrusions 300, 301 on a part of the bobbin surface in consideration of contact with the primary coil 4. By doing so, it is secured between the convex portions. Further, the depth of the groove 41 is larger than the wire diameter of the secondary coil. V-shaped cuts 3 1 3 and 3 2 3 are formed in the flanges 3 1 and 3 2 located at both ends of the groove 41 of the flanges of the bobbin 3 [Fig. b) (c)] c The bottoms of the cuts 3 1 3 and 3 2 3 communicate with the grooves 41. The lead wire 5 ′ of the secondary coil passes through the collar portions 31 and 32 through the cuts 3 13 and 3 23.
2次コイル 5の高電圧側の引き出し線 5〃 は、 ボゼン '3の高電圧 側のつば部 3 5に設けた案内溝 3 '5 3に案内されてボビン 3の高電 圧側一端に設けたつば部 3 6の案内溝 3 6 1 に掛け渡された後に高 電圧ダイオー ド 2 0に接続される 〔第 3図 .(b) ( e )〕。 The lead wire 5 引 き 出 し on the high voltage side of the secondary coil 5 was guided to the guide groove 3 '53 3 provided in the flange 35 on the high voltage side of Bozen '3, and was provided at one end of the bobbin 3 on the high voltage side. After being bridged over the guide groove 36 1 of the flange portion 36, it is connected to the high-voltage diode 20 [FIG. 3 (b) (e)].
高電圧ダイオー ド 2 0は、 つば部 3 6の外側面につば部と一体に 成形した支持部' 3 9によ'り保持されている。 The high-voltage diode 20 is held on the outer surface of the flange 36 by a support portion 39 integrally formed with the flange.
1次コイル 4は、 第 3図 ( b ) に示すよう に、 一端 4 ' が金具 (中 継端子) 1 2に絡げ (巻き付け) られた後、 つば部 3 1 に設けた切 り欠き 3 1 4からボビン 3の低電圧側外周 3 A 〔第 3図 ( a )〕 に導 かれて低電圧側外周 3 Aに卷かれる。 このよう にして、 1次コイル の一方の卷線部 4 Aが形成される。 その後、 卷線部 4 Aにおける 1 次コイル巻き終わりの引き出し線 4 A は、 低電圧側のつば部 3 2 に設けた案内溝 3 2 1 と高電圧側のつば部 3 5に設けた案内溝 3 5
1 に掛け渡される 〔第 3図 ( a )、 ( c )、 ( d )〕。 したがって、 1次 コイル 4の引き出し線 4 A ' は、 2次コイル 5の外側に沿って 2次 コイルと接触するこ となく高電圧側外周 3 Bに導かれる。 そ して 1 次コイル 4の残りが符号 4 Bに示すよう に髙電圧側外周 3 Bに巻か れる。 As shown in Fig. 3 (b), the primary coil 4 has one end 4 'tied (wrapped) around a metal fitting (relay terminal) 12 and a notch 3 From 14, it is guided to the low voltage side outer periphery 3 A of the bobbin 3 [Fig. Thus, one winding portion 4A of the primary coil is formed. After that, the lead wire 4 A at the end of the primary coil winding in the winding part 4 A is connected to the guide groove 32 1 provided in the low voltage side flange 32 and the guide groove provided in the high voltage side flange 35. 3 5 Multiplied by 1 [Fig. 3 (a), (c), (d)]. Therefore, the lead wire 4 A ′ of the primary coil 4 is guided to the high voltage side outer periphery 3 B along the outside of the secondary coil 5 without contacting the secondary coil. Then, the remainder of the primary coil 4 is wound around the outer periphery 3B on the low voltage side as shown by reference numeral 4B.
高電圧側外周 3 Bに卷かれた 1次コイル卷き終わ りの引き出し線 4 B ' は、 高電圧側つば部 3 5 に設けた案内溝 3 5 2 から低電圧側 つば部 3 2 に設けた案内溝 3 2 2 さらには低電圧側一端のつば部 3 1 の案内溝 3 1 1 に掛け渡され、 つば部 3 1 に設けた金具 (中継端 子) 1 1 に絡げられている。 したがって、 1次コイルの引き出し線 4 B f も 2次コイル 5 の外側に沿って (非接触状態)、 中継端子 1 ί と電気的に接続されるこ とになる。 ■ The lead wire 4 B ′ at the end of the primary coil winding wound around the high voltage side outer periphery 3 B is provided from the guide groove 35 2 provided in the high voltage side flange 35 to the low voltage side collar 32. The guide groove 3 2 2 is further extended over the guide groove 3 1 1 of the flange 3 1 at one end on the low voltage side, and is entangled with a fitting (relay terminal) 1 1 provided on the flange 3 1. Therefore, the lead wire 4 B f of the primary coil is also electrically connected to the relay terminal 1 に along the outside of the secondary coil 5 (in a non-contact state). ■
中継端子 1 1 は、 ボビンの低電圧側のつば部 3 2 に設けた突起 3 8 にイ ンサー ト成形されており、 その一端に上記引き出し線 4 Β ' が絡げられ、 も う一端 1 1 ' が第 4図に示すよう にィ グナイ 夕 6の 端子 1 0 Α (第 8図の I G B T 1 0 0の レクタ側) に接続されて いる。 The relay terminal 11 is insert-molded into a protrusion 38 provided on the flange 32 on the low voltage side of the bobbin, and the above-mentioned lead wire 4 Β 'is entangled at one end thereof, and the other end 1 1 'Is connected to terminal 10 の of igniter 6 (receptor side of IGBT 100 in Fig. 8) as shown in Fig. 4.
上記の卷線態様を採用するこ とによ り、 2次コイル 5の低電圧側 の引き出し線 5 ' は、 ボビン 3の一端外周に設けた溝 4 1を介して ボビン 3 と 1次コイル 4 ( 4 A ) の間を通され、 かつボビン一端に 設けた端子 1 2 に接続することができる。 溝 4 1 は、 2次コイル 5 の線径よ り も深く している。 したがって、 2次コイル 5 の引き出し 線 5 ' は、 1次コイルの巻線領域 3 Aを 1次コイル 4に接触するこ
とな く引き出し可能になる。 By adopting the above-described winding mode, the lead wire 5 ′ on the low voltage side of the secondary coil 5 is connected to the bobbin 3 and the primary coil 4 via the groove 41 provided on the outer periphery of one end of the bobbin 3. (4A) and can be connected to the terminal 12 provided at one end of the bobbin. The groove 41 is deeper than the wire diameter of the secondary coil 5. Therefore, the lead wire 5 ′ of the secondary coil 5 can contact the winding area 3 A of the primary coil with the primary coil 4. It can be pulled out immediately.
また、 1 次コイル 4 を卷線する時に 2 次コイル 5 の引き出し線 5 ' が干渉することがなく なり、 2次コイル 5 の断線を防ぐこ とが できる。 さ らに、 1次コイル 4の分割卷線の引き出し線 4 A ' 、 4 5 B ' を 2次コイル 5上に掛け渡すこ とによ り、 2次コイルの低電圧 側と高電圧側に 1次コイル 4を分割卷きするこ とが可能になる。 In addition, when the primary coil 4 is wound, the lead wire 5 ′ of the secondary coil 5 does not interfere, and the disconnection of the secondary coil 5 can be prevented. In addition, the lead wires 4 A ′ and 45 B ′ of the split winding of the primary coil 4 are laid over the secondary coil 5, so that the secondary coil 5 has a low voltage side and a high voltage side. The primary coil 4 can be wound separately.
断面 Dの字形のコアにおける磁路 Aにボビン 3が嵌合する。 磁路. Aと平行なもう一方の磁路 Bは、 1次コイル 4 ( 4 A , 4 B ) 及び 2次コイル 5の外側に沿って配置される。 ボビン 3 に配設される各 L0 . つば部 3 1、 3 2、 3 3、 3 5、 3 6 は、 その外縁一部 3 1 ' 、 3 2 ' 、 3 3 ' 、 '3 5 ' 、 3· 6 ' が直線状にカ ヅ トされ、 この外縁 部に磁路 Bにおける平坦面 (磁路 Bにおける断面 Dの字のう ち'直線 辺に相当する側面)があてがわれ或いは近接するよう に配置される。 ' したがって、 コア 2、 1 次コイル 4、 2次コイル 5 を、 コンパク 5 トに組立てることが可能になり、 閉磁路全体が 1次コイル、 2次コ 'ィルと共に円筒のケース 1 に収納可能になる。 ' The bobbin 3 fits into the magnetic path A in the core having a D-shaped cross section. The other magnetic path B parallel to the magnetic path A is arranged along the outside of the primary coil 4 (4A, 4B) and the secondary coil 5. Each L0 disposed on the bobbin 3. The flanges 3 1, 3 2, 3 3, 3 5, 3 6 have their outer edges 3 1 ′, 3 2 ′, 3 3 ′, 3 5 ′, 3 · 6 'is cut in a straight line, and a flat surface in the magnetic path B (the side corresponding to the' straight side 'of the cross-section D in the magnetic path B) is applied to or close to the outer edge. Placed in '' Therefore, it is possible to assemble the core 2, the primary coil 4, and the secondary coil 5 into a compact 5, and the entire closed magnetic circuit can be stored in the cylindrical case 1 together with the primary coil and the secondary coil. become. '
1次コイルの引き出し線を掛け渡す案内溝 3 1 1、 3 2 1、 3 2 2、 3 5 1、 3 5 2や 2次コイルの高圧側引き出し線を掛け渡す案 内溝 3 5 3、 3 6 1 は、 つば部 3 1、 3 2、 3 5、 3 6のカ ッ ト部 0 3 1 z ヽ 3 2 ' 、 3 5 ' 、 3 6 ' の傍らに設けた突起 3 1 5、 3 2 5、 3 5 5、 3 6 2 に設けられている。 Guide groove for bridging the lead wire of the primary coil 3 1 1, 3 2 1, 3 2 2, 3 5 1, 3 5 2 and plan for bridging the high-voltage side lead wire of the secondary coil Inner groove 3 5 3, 3 6 1 is a projection 3 1 5, 3 2 provided beside the cut section 0 3 1 z ヽ 3 2 ′, 3 5 ′, 3 6 ′ of the collar section 3 1, 3 2, 3 5, 3 6 5, 3, 5 5 and 3 6 2.
これらの案内溝に 1次コイル、 2次コイルの引き出し線 4 A ' 、 4 B " , 5 を通すことによ り、 次のような利点がある。 1 次コィ
ルの引き出し線 4 A' 、 4 B ' は、 2次コイル 5の卷線部外径ゃケ —ス 1の内径に接触するこ とを防止できる。 また、 2次コイル 5に ついては 1次コイル 4 Bの外径やケース 1の内径に接触するこ とを 防止するこ とができる。 ボビン 1は、 断面形状が、 楕円状であって もよい。 By passing the lead wires 4A ', 4B ", 5 of the primary coil and secondary coil through these guide grooves, the following advantages can be obtained. The lead wires 4 A ′ and 4 B ′ of the coil can be prevented from contacting the inner diameter of the outer diameter case 1 of the winding part of the secondary coil 5. Further, the secondary coil 5 can be prevented from contacting the outer diameter of the primary coil 4B and the inner diameter of the case 1. The cross section of the bobbin 1 may be elliptical.
ボビン 3は、 コア 2 と 2次コイル 5の間に配置され、 2次コイル 5で発生した高電圧を絶縁する役目もある。 The bobbin 3 is disposed between the core 2 and the secondary coil 5, and also has a function of insulating high voltage generated in the secondary coil 5.
ボビン 3に設けた 2次コイル用の複数のつば部 3 3には、 2次コ ィル 5を分割卷きするための切り欠き 3 2 7が設けられている。 . 本実施例のィ グ.ナイ.夕ケース 1 B及びコネク夕,部 1 Cは、 コイル ケース 1 と一体'に成形されているが、 別体に成形されでも'よい。 . ' コネクタ部 1 Cには、 '電源供給端子 9 A、 G N D端子 9 B、 点火' 信号入力端子 9 Cがイ ンサー ト成形によ り固定されている。 端子 9 Aは、 基板 7の下中継端子 1 2 と接続され .(第 3図 ( b ) 参照)、 端 子 9 Bはィ グナイ夕 6のグラン ド端子 1 0 Bと接続され、 端子 9 C はィ グナイ 夕 6の信号入力端子 1 0 Cに接続されている。 ' The plurality of collars 33 for the secondary coil provided on the bobbin 3 are provided with cutouts 327 for dividing and winding the secondary coil 5. In the present embodiment, the ignition case 1B and the connector 1C are formed integrally with the coil case 1 but may be formed separately. 'The power supply terminal 9A, GND terminal 9B, and ignition' signal input terminal 9C are fixed to the connector section 1C by insert molding. Terminal 9A is connected to lower relay terminal 12 of substrate 7 (see Fig. 3 (b)), terminal 9B is connected to ground terminal 10B of igniter 6, and terminal 9C is connected. Is connected to the signal input terminal 10 C of the ignition 6. '
ィ グナイ 夕 6は、 第 9図に示すように I GB T 1 0 5をヒ一 トシ ンク 1 1 0上に接合し、 このヒー ト シンク 1 1 0を放熱用の銅又は アルミニウムの金属板 1 1 2にシリ コン接着剤 1 1 1を介して接着 してなる。 As shown in Fig. 9, IGBT 105 is bonded to heat sink 110, and heat sink 110 is connected to heat-dissipating copper or aluminum metal plate 1 as shown in Fig. 9. Adhered to 1 2 via silicon adhesive 1 1 1.
ィ グナイ 夕ケース 1 Bには、 点火コイルを取り付けるための突起 2 1 0、 2 1 1及び取り付け穴 2 1 3、 2 1 4が設けられている。 ボビン 3内周とコア 2の外周間には、 可とう性エポキシを真空下
(例えば 4 Torr以下) で注入, 硬化するか、 或いは第 2図に示すよ う にコア 2 の周 り にシリ コ ンゴム 2 3 0 を被せるか、 コア 2の周り にシ リコンゴムを成形するか、 コア 2の周り に熱収縮チューブを被 せる。 それによつて、 2次コイル 5 とコア 2の間の電界集中及び応 5 力集中を防止している。 The ignition case 1B is provided with projections 210, 211 and mounting holes 211, 214 for mounting an ignition coil. Flexible epoxy is applied under vacuum between the inner periphery of bobbin 3 and the outer periphery of core 2. (E.g., 4 Torr or less), injecting and curing, or as shown in Fig. 2, covering the core 2 with a silicone rubber 230, forming a silicone rubber around the core 2, Put heat shrink tubing around core 2. This prevents electric field concentration and stress concentration between the secondary coil 5 and the core 2.
このような点火コイルの組立体 (コア 2、 1次コィノレ 4、 2次コ ィル 5 ) 及びィ グナイ夕 6 を揷入した後に、 エポキシ樹脂 6 0 をコ ィルケ一ス 1.及びィグナイ タケ一ス 1 B内に真空下 (例えば 4 Torr 以下) で注入される。 After the assembly of such an ignition coil (core 2, primary coil 4, secondary coil 5) and igniter 6, the epoxy resin 60 is immersed in coil 1 and igniter 1. Injected into vacuum 1B under vacuum (eg, 4 Torr or less).
0 - 点火プラグが挿入される部分 1 Dには、 2次電流を供給する機.能 ' を兼ねるスプリ ング 1 7が内装されている。 コイルケース 1 には、 一 プラグホール内に '挿入したときにプラグホ一ルに水が侵入せず、 且 つ換気ができるような.プラグホールシール 6 1 を取付けている。 0-A part 1 D into which a spark plug is inserted is provided with a spring 17 which also functions as a secondary current supply function. The coil case 1 is provided with a plug hole seal 61 so that water does not enter the plug hole and can be ventilated when it is inserted into the plug hole.
本実施例によれば、 次のような効果を奏する。 .. According to this embodiment, the following effects can be obtained. ..
5 一つのボビンに 1次コイル 4及び 2次コイル 5 を卷き、 かつボビ ン中央部に 2次コイル 5 を、 その低電圧側と高電圧側の両端に 1次 コイルを分割卷きするこ とで、 1次コイルと 2次コイルの結合係数 を上げるこ とができ、 限られたスペース の中で高出力の内燃機関用 点火コイルを実現するこ とができる。 また、 1次コイルを 2次コィ0 ルと干渉させることなく 2次コィルの低電圧側、 高電圧側に分割巻 きするこ とができ、 コイルの巻き線作業が行い易く、 また、 コイル 切断を防止して品質保証を高めるこ とができる。 5 A primary coil 4 and a secondary coil 5 are wound around one bobbin, a secondary coil 5 is wound at the center of the bobbin, and a primary coil is dividedly wound at both ends of the low voltage side and the high voltage side. Thus, the coupling coefficient between the primary coil and the secondary coil can be increased, and a high-output ignition coil for an internal combustion engine can be realized in a limited space. In addition, the primary coil can be divided and wound on the low voltage side and high voltage side of the secondary coil without interfering with the secondary coil, making coil winding work easier and cutting the coil. Quality assurance and quality assurance.
第 1 0 図に本発明の他の実施例を示す。 第 1 0図において、 既述
した第 1 実施例と同一の符号は同一或いは共通する要素を示す。 本実施例において、 1 次コイル 4の分割卷き、 2 次コイル 5 の分 割卷きの態様及び 1 次コイル, 2次コイルの全体的なレイ ァゥ トは、 既述した実施例と同様である。 FIG. 10 shows another embodiment of the present invention. In Fig. 10 The same reference numerals as those in the first embodiment denote the same or common elements. In this embodiment, the mode of the divided winding of the primary coil 4 and the divided winding of the secondary coil 5 and the overall layout of the primary coil and the secondary coil are the same as those of the above-described embodiment. It is.
こ こでは、 相違点について説明する。 Here, the differences are explained.
既述したよう に、 一つのボビン 3 における 2次コイル 5の低電圧 側と高電圧側とに 1次コイル 4 A、 4 B を配置する こ とは、 コイル の結合係数を高め、 コイル組立体のコ ンパク ト化及び収納性を高め る こ とができる。 As described above, arranging the primary coils 4A and 4B on the low voltage side and the high voltage side of the secondary coil 5 in one bobbin 3 increases the coupling coefficient of the coil and increases the coil assembly. This makes it possible to increase the compactness and the storage capacity.
したがって.、 筒状のコイルケース 1 の内部に、 1 次コイル 4 , 2 -次コイル 5 と共に閉磁路型のコア 2 全体とィ グナイ 夕 6 を収納する スペースを確保する こ と'が可能になる。 '本実施例では、' このコィル ケース 1 の空きスペースを有効利用 してィ グナイ 夕 6 を収納する。 Therefore, it is possible to secure a space inside the cylindrical coil case 1 for accommodating the entire closed magnetic circuit type core 2 together with the primary coils 4 and the secondary coil 5 and the ignition coil 6. . 'In this embodiment', the empty space of the coil case 1 is used effectively to store the signature 6.
こ こで、 コイルケース 1 の軸方向におけるコイル挿入側の一端を 上側、 点火プラグと接続する側を下側と した場合に、 コイルケース 1 の上部に外部端'子'と接続するためのコネクタ部 1 Cが形成されて いる。 また、 ィ グナイ 夕 6 の設置部がコネクタ部 1 Cの位置よ り低 い位置に設定されている。 Here, when the one end of the coil insertion side in the axial direction of the coil case 1 is set to the upper side and the side connected to the spark plug is set to the lower side, the connector for connecting the external terminal 'terminal' to the upper part of the coil case 1 Part 1C is formed. Also, the installation part of SIGNAY 6 is set lower than the position of connector part 1C.
また、 本実施例では、 第 1実施例よ り も点火コイル装着部 1 D及 びスプリ ング 1 7の短縮化を図っている。 本実施例によれば、 点火 コイルのよ り一層のコンパク ト化を図る こ とができる。 また、 スプ リ ング 1 7 を短縮する こ とで、 点火ノ イ ズの発生を抑える効果があ る。
産業上の利用可能性 Further, in this embodiment, the ignition coil mounting portion 1D and the spring 17 are made shorter than in the first embodiment. According to this embodiment, the ignition coil can be made even more compact. In addition, shortening the spring 17 has the effect of suppressing the occurrence of ignition noise. Industrial applicability
本発明によれば、 ボビン中央部に 2次コイルを、 その低電圧側 と高電圧側の両端に 1次コイルを分割して巻く ことによ り、 1次コ ィルと 2次コイルの結合係数を上げるこ とができ、 限られたスぺ一 スの中で高出力の内燃機関用点火コイルを提供することができる。
According to the present invention, the primary coil and the secondary coil are coupled by dividing and winding the secondary coil at the center of the bobbin and the primary coil at both ends of the low voltage side and the high voltage side. The coefficient can be increased, and a high-output internal combustion engine ignition coil can be provided within a limited space.
Claims
1 . 内燃機関のシ リ ンダへッ ドの各プラグホールに装着される 点火コイルであって、 磁路を形成するコアと、 前記コアの外周にボ ビンを介して配置される 1次コイル及び 2次コイルとを備え、 前記 5 1次コイル及び 2次コイルは一つのボビンに軸方向に並んで配置さ れている内燃機関用点火コィルにおいて、 1. An ignition coil mounted on each plug hole of a cylinder head of an internal combustion engine, comprising: a core forming a magnetic path; a primary coil disposed on a periphery of the core via a bobbin; A secondary coil, wherein the 5 primary coil and the secondary coil are arranged in a single bobbin in the axial direction,
前記ボビンの中央部に前記 2次コイルが卷線され、 前記 1次コィ ルは、 前記 2次コイルの低電圧側と高電圧側に分割して巻かれてい ることを特徴とする内燃機関用点火コイ ル。 The secondary coil is wound around a center portion of the bobbin, and the primary coil is divided and wound on a low voltage side and a high voltage side of the secondary coil. Ignition coil.
L0 2 . 内燃機関のシリ ンダヘッ ドの各プラグホールに装着される点 火コイルであって、 磁路を形成するコアと、 前記コアの外周にボビ ンを介して配置される 1次コイル及び 2次コイルとを備え、 前記 1 次コイル及び 2次コイルは一つのボビンに軸方向に並んで配置され ている内燃機関用点火コイルにおいて、 L0 2. An ignition coil attached to each plug hole of a cylinder head of an internal combustion engine, comprising: a core forming a magnetic path; a primary coil and a secondary coil disposed around the outer periphery of the core via a bobbin. A primary coil and a secondary coil, wherein the primary coil and the secondary coil are arranged side by side in one bobbin in the axial direction.
5 前記ボビンの中央部に前記 2次コイルが卷線され、 前記 1次コィ ルは、 前記 2次コィルの低電圧側と高電圧,側に分割して卷かれ、 前記 2次コィルの低電圧側の引き出し線は、 前記ボビンの一端外 周に設けた溝を介して前記ボビンと前記 1次コイルの間を通され、 かつボビン一端に設けた端子に接続されているこ とを特徴とする内 0 燃機関用点火コイル。 5 The secondary coil is wound around the center of the bobbin, the primary coil is divided and wound on the low voltage side and the high voltage side of the secondary coil, and the low voltage of the secondary coil is wound. The lead wire on the side is passed between the bobbin and the primary coil through a groove provided on the outer circumference of one end of the bobbin, and is connected to a terminal provided on one end of the bobbin. 0 ignition coil for fuel engine.
3 . 内燃機関のシリ ンダへッ ドの各プラグホールに装着される点 火コイルであって、 磁路を形成するコアと、 前記コアの外周にボビ ンを介して配置される 1次コイル及び 2次コイルとを備え、 前記 1
次コイル及び 2次コイルは一つのボビンに軸方向に並んで配置され ている内燃機関用点火コィルにおいて、 3. A ignition coil mounted in each plug hole of a cylinder head of an internal combustion engine, the core forming a magnetic path; A secondary coil; The primary coil and the secondary coil are arranged in a single bobbin in the axial direction.
前記ボビンの中央部に前記 2次コイルが卷線され、 前記 1次コィ ルは、 前記 2次コィルの低電圧側と高電圧側に分割して卷かれ、 5 前記ボビンのうち前記 2次コイルの低電圧側に隣接する一端外周 を低電圧側外周、 前記 2次コイルの高電圧側に隣接する一端外周を 高電圧側外周と定義する と、 前記 1次コイルは、 前記ボビンの低電 圧側外周から巻かれ、 その低電圧側外周における 1次コイル巻き終 わりの引き出し線が前記 2次コイルの外側に沿つて低電圧側, 高電0 圧側に設けたつば部に掛け渡されて 1次コイルの残.りが前記高電圧 側外周に巻かれており、 前記高電圧側外周'の 1次コイル卷き終わり The secondary coil is wound around the center of the bobbin, the primary coil is divided and wound on the low voltage side and the high voltage side of the secondary coil, and 5 the secondary coil of the bobbin The outer periphery of one end adjacent to the low voltage side of the secondary coil is defined as the outer periphery of the low voltage side, and the outer periphery of the one end adjacent to the high voltage side of the secondary coil is defined as the outer periphery of the high voltage side. It is wound from the outer circumference, and the lead wire at the low voltage side outer circumference at the end of winding of the primary coil is wound around the collar provided on the low voltage side and the high voltage side along the outside of the secondary coil. The remainder of the coil is wound around the outer periphery of the high voltage side, and the winding of the primary coil at the outer periphery of the high voltage side ends.
- の引き出し線が再び前記 2次コィルの外側に沿って前記ボビンの高 電圧側, 低電圧側のつば部に掛け渡されて端子と電気的に接続され ていることを特徴とする内燃機関用点火コィル。 ,5-For the internal combustion engine, wherein the lead wire of-is again extended along the outside of the secondary coil to the high voltage side and low voltage side flanges of the bobbin and is electrically connected to the terminal. Ignition coil. ,Five
4 . 前記ボビンの低電圧側, 高電圧のつば部には、 前記 1次コィ ルの引き出し線を通すための案内溝が形成されている請求項 '3記載 の内燃機関用点火コイル。 4. The ignition coil for an internal combustion engine according to claim 3, wherein a guide groove for passing the lead wire of the primary coil is formed in a low voltage side, high voltage flange portion of the bobbin.
5 . 前記ボビンの一端に設けたつば部には、 前記 1次コイルの鼋 源供給側の一端および前記 2次コィルの低電圧側の一端を電源端子0 に接続するための金具と、 前記 1次コイルの巻き終わりの一端を点 火駆動回路のスイ ッチング素子の端子に接続するための金具がイ ン サ一 ト成形されている請求項 1 ないし 4のいずれか 1記載の内燃機 関用点火コイル。
5. A collar provided at one end of the bobbin includes a metal fitting for connecting one end of a power supply side of the primary coil and one end of a low voltage side of the secondary coil to a power supply terminal 0; The ignition coil for an internal combustion engine according to any one of claims 1 to 4, wherein a metal fitting for connecting one end of the winding end of the next coil to a terminal of the switching element of the ignition drive circuit is insert-molded. .
6 . 前記コアは閉磁路を形成する長方形の環状コアであ り、 この 環状コア全体が 1次コイル、 2次コイルと共に円筒形のケースに収 納されている請求項 1ないし 4のいずれか 1項記載の内燃機関用点 火コイル。 6. The core according to any one of claims 1 to 4, wherein the core is a rectangular annular core forming a closed magnetic circuit, and the entire annular core is housed in a cylindrical case together with a primary coil and a secondary coil. The ignition coil for an internal combustion engine according to the item.
7 . 内燃機関のシリ ンダへッ ドの各フ。ラグホールに装着される点 火コイルであって、 磁路を形成するコアと、 前記コアの外周にボビ ンを介して配置される 1次コイル及び 2次コイルとを備えた内燃機 関用点火コイルにおいて、 7. Each part of the cylinder head of the internal combustion engine. What is claimed is: 1. An ignition coil for an internal combustion engine, comprising: a ignition coil mounted in a lug hole, comprising: a core forming a magnetic path; and a primary coil and a secondary coil disposed on the outer periphery of the core via a bobbin. ,
前記 1次コイルと 2次コイルが一つのボビンに軸方向に雜 ..で配 置され、 The primary coil and the secondary coil are axially arranged on one bobbin,
前記コアは、磁路に垂直な断面が Dの字形に積層した鋼板であ り、 閉磁路構造をなしており、 The core is a steel sheet having a cross section perpendicular to the magnetic path laminated in a D shape, and has a closed magnetic path structure,
前記 ビンも、 軸方向に垂直な断面が前記コアの断面形状に合わ せてあり、 The cross section perpendicular to the axial direction of the bin also matches the cross sectional shape of the core,
前記コアは、 閉磁路のう ち平行配置される長手方向の磁路の一方 (以下、 「磁路 A」 と称する) に前記ボビンが嵌合し、 且つ前記磁路 Aと平行なもう一方の磁路 (以下、 「磁路 B」 と称する) が前記 1次 コイル、 2次コイルの外側に沿って配置され、 The bobbin fits into one of the longitudinal magnetic paths (hereinafter, referred to as “magnetic path A”) of the closed magnetic path, which is disposed in parallel with the closed magnetic path, and the other core is parallel to the magnetic path A. A magnetic path (hereinafter referred to as “magnetic path B”) is arranged along the outside of the primary coil and the secondary coil,
前記ボビンに配設される各つば部は、その外縁一部が直線をなし、 この外縁一部に前記磁路 Bの前記断面 Dの字の直線辺に相当する側 面があてがわれ或いは近接するように前記磁路 Bが配置され、 An outer edge part of each of the collar portions provided on the bobbin is linear, and a side surface corresponding to the straight side of the cross section D of the magnetic path B is applied to or close to the outer edge part. The magnetic path B is arranged so that
前記コアの閉磁路全体が前記 1次コイル、 2次コイルと共に円筒 のケースに収納されていることを特徴とする内燃機関用点火コィル
An ignition coil for an internal combustion engine, wherein the entire closed magnetic path of the core is housed in a cylindrical case together with the primary coil and the secondary coil.
8 . 前記ボビンの中央部に前記 2次コイルが巻かれ、 前記 2次コ ィルの低電圧側, 高電圧側の両端に前記 1次コイルが分割巻きされ ている請求項 7記載の内燃機関用点火コイル。 8. The internal combustion engine according to claim 7, wherein the secondary coil is wound around a center portion of the bobbin, and the primary coil is dividedly wound at both ends of the secondary coil on a low voltage side and a high voltage side. For ignition coil.
9 . 閉磁路を形成するコアと、 前記コアの外周一部にボビンを介 して配置される 1次コイル及び 2次コイルと、 前記 1次コイル及び 2次コイルを駆動するための点火駆動回路ュニッ ト とを備えた内燃 機関用点火コイルにおいて、 9. A core forming a closed magnetic circuit, a primary coil and a secondary coil arranged on a part of an outer periphery of the core via a bobbin, and an ignition drive circuit for driving the primary coil and the secondary coil And an ignition coil for an internal combustion engine having a
前記 1次コイル, 2次コイルを収容する筒状のケースに前記閉磁 路型のコア全体と前記点火駆動回路ュニッ トを収納し、 The entire closed magnetic circuit type core and the ignition drive circuit unit are accommodated in a cylindrical case accommodating the primary coil and the secondary coil,
かつ前記ボビンの中央部に前記 2次コイルを巻き、 前記ボビンの 両端には、 前記 2次コイルを挾むようにして前記 1 次コィルが分割 巻きされていることを特徴とする内燃機関用点火コイリレ。 An ignition coil for an internal combustion engine, wherein the secondary coil is wound around a center portion of the bobbin, and the primary coil is dividedly wound around both ends of the bobbin so as to sandwich the secondary coil.
1 0 . 前記筒状ケースの軸方向におけるコィル揷入側の一端を上 側、 点火プラグと接続する側を下側とし.た場合に、 前記筒状ケース の上部に外部端子と接続するためのコネクタ部が形成され、 前記点 ' 火駆動回路ュニッ 卜の設置部が前記コネクタ部の位置よ り低い位置 に設定されている請求項 9記載の内燃機関用点火コィル。 10. When the one end of the coil insertion side in the axial direction of the cylindrical case is the upper side, and the side connected to the spark plug is the lower side, the upper part of the cylindrical case is connected to an external terminal. 10. The ignition coil for an internal combustion engine according to claim 9, wherein a connector portion is formed, and an installation portion of the ignition drive circuit unit is set at a position lower than a position of the connector portion.
1 1 . 前記閉磁路は少な く とも 2分割したコアを一つに組立てた もので、 その繋ぎ目に永久磁石を配置してなる請求項 7ないし 1 0 のいずれか 1項記載の内燃機関用点火コイル。
11. The internal combustion engine according to any one of claims 7 to 10, wherein the closed magnetic path is formed by assembling at least two divided cores into one, and a permanent magnet is arranged at a joint thereof. Ignition coil.
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PCT/JP2002/001550 WO2003071562A1 (en) | 2002-02-21 | 2002-02-21 | Ignition coil for internal combustion engine |
JP2003570372A JPWO2003071562A1 (en) | 2002-02-21 | 2002-02-21 | Ignition coil for internal combustion engine |
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PCT/JP2002/001550 WO2003071562A1 (en) | 2002-02-21 | 2002-02-21 | Ignition coil for internal combustion engine |
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Cited By (2)
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JP2006278867A (en) * | 2005-03-30 | 2006-10-12 | Hanshin Electric Co Ltd | Ignition coil for internal combustion engine |
JP2011082258A (en) * | 2009-10-05 | 2011-04-21 | Hanshin Electric Co Ltd | Ignition coil for internal combustion engine |
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