JP5631638B2 - Ignition device for internal combustion engine - Google Patents

Ignition device for internal combustion engine Download PDF

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JP5631638B2
JP5631638B2 JP2010136427A JP2010136427A JP5631638B2 JP 5631638 B2 JP5631638 B2 JP 5631638B2 JP 2010136427 A JP2010136427 A JP 2010136427A JP 2010136427 A JP2010136427 A JP 2010136427A JP 5631638 B2 JP5631638 B2 JP 5631638B2
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ignition
coil
internal combustion
combustion engine
ignition coil
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拓志 西村
拓志 西村
山田　修司
修司 山田
勇人 小柴
勇人 小柴
義之 福村
義之 福村
尚紀 片岡
尚紀 片岡
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Diamond Electric Manufacturing Co Ltd
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Description

本発明は、内燃機関用点火装置に関するものである。 The present invention relates to an internal combustion engine ignition device.

従来より燃費改善などで、理論空燃比より燃料の割合が低い混合気で燃焼させるリーン燃焼やシリンダ内の層状混合気を形成して成層燃焼を行うものがある。しかし、リーン燃焼や成層燃焼では空燃比のばらつきがあることや、点火プラグのくすぶりによってミスファイアを起こすことが知られている。そしてこのような状態においては多重点火をすることでミスファイアを防ぐものが知られている。 Conventionally, for example, lean combustion in which an air-fuel mixture having a fuel ratio lower than the stoichiometric air-fuel ratio is burned or stratified combustion is formed by forming a stratified air-fuel mixture in a cylinder in order to improve fuel efficiency. However, it is known that in lean combustion and stratified combustion, there are variations in the air-fuel ratio, and misfires are caused by smoldering spark plugs. And in such a state, what prevents misfire by performing multiple ignition is known.

例えば特許第３６５１３０４号公報（以下「特許文献１」）では、相対的に２次電圧の立ち上がりが速く放電時間が短い特性を有した第１点火コイルと、相対的に２次電圧の立ち上がりが遅く放電時間が長い特性を有した第２点火コイルと、機関運転状態に応じて前記第１点火コイルと第２点火コイルとを独立して駆動し、成層燃焼運転時には、第１点火コイル及び第２点火コイルを、第１点火コイルの駆動開始時期を第２点火コイルより早めて、共に駆動する点火制御手段としている。また、前記点火制御手段は、始動時又は理論空燃比若しくは理論空燃比よりリッチな空燃比での運転時に第１点火コイルのみを駆動している。さらに、前記点火制御手段は、均質リーン燃焼運転時又は理論空燃比で所定のＥ
Ｇ Ｒ 率以上でＥＧ Ｒ を行う運転時に、第２ 点火コイルのみを駆動している。 For example, in Japanese Patent No. 36551304 (hereinafter referred to as “Patent Document 1”), the rise of the secondary voltage is relatively fast and the discharge time is relatively short, and the rise of the secondary voltage is relatively slow. The second ignition coil having a long discharge time characteristic, and the first ignition coil and the second ignition coil are driven independently according to the engine operating state. During the stratified combustion operation, the first ignition coil and the second ignition coil are driven. The ignition coil serves as an ignition control means for driving the first ignition coil earlier than the second ignition coil. Further, the ignition control means drives only the first ignition coil at the time of start-up or operation at a stoichiometric air-fuel ratio or an air-fuel ratio richer than the stoichiometric air-fuel ratio. Further, the ignition control means is configured to perform a predetermined E at a homogeneous lean combustion operation or at a stoichiometric air-fuel ratio.
Only the second ignition coil is driven during the operation of performing EG R at a GR rate or higher.

また、成層燃焼運転時以外で失火を検出したときには、前記点火制御手段は、第１点火コイルと第２点火コイルを共に駆動している。さらに、成層燃焼運転時に失火を検出したときには、成層燃焼運転から均質燃焼運転に切り換えると共に、前記点火制御手段は、第１点火コイルのみを駆動している内燃機関の点火装置が提案されている。 When a misfire is detected at times other than during stratified combustion operation, the ignition control means drives both the first ignition coil and the second ignition coil. Furthermore, when a misfire is detected during the stratified combustion operation, an ignition device for an internal combustion engine is proposed in which only the first ignition coil is driven as the ignition control means while switching from the stratified combustion operation to the homogeneous combustion operation.

特許第３６５１３０４号公報Japanese Patent No. 36551304

しかしながら上記従来の内燃機関用点火装置では次のような問題が生じている。即ち、特許文献１の点火装置ではミスファイアに対して２重点火を行い、放電時間を長くしているので、経年変化によるシリンダ内部の劣化や点火プラグにカーボンが付着するなどの更なる条件の悪化によりさらにミスファイアが起こりやすくなった場合に、正常な点火が行えない。また、特許文献１の点火装置ではエンジンに搭載する具体的なコイルの提案がない。 However, the above-described conventional ignition device for an internal combustion engine has the following problems. That is, in the ignition device of Patent Document 1, since double ignition is performed on the misfire and the discharge time is lengthened, further conditions such as deterioration inside the cylinder due to secular change and carbon adhering to the spark plug are obtained. When misfires are more likely to occur due to deterioration, normal ignition cannot be performed. Further, the ignition device disclosed in Patent Document 1 does not propose a specific coil to be mounted on the engine.

本発明は上記課題に鑑みなされたもので、リーン燃焼や成層燃焼では空燃比のばらつきがあることや、点火プラグのくすぶり、経年変化によるシリンダ内部の劣化といった更なる悪条件によって起こるミスファイアも防ぐための着火性能を向上させるとともに、エンジンヘッドへの取り付けが容易な内燃機関用点火装置を提供することを目標とする。 The present invention has been made in view of the above problems, and prevents misfire caused by further adverse conditions such as air-fuel ratio variation in lean combustion and stratified combustion, ignition plug smoldering, and deterioration inside the cylinder due to aging. It is an object of the present invention to provide an ignition device for an internal combustion engine that can improve the ignition performance and can be easily attached to an engine head.

上記課題を解決するために本発明は次のような構成とする。即ち、請求項１の発明においては、それぞれが１次コイル，２次コイル及び鉄芯からなる２つの点火コイルと、前記２つの点火コイルが収容されたケースと、を備え、前記ケースは、外部からの電源及び信号を供給するコネクタと、点火プラグへ高電圧を供給する高圧出力部と、が備えられ、前記ケースの前記２つの点火コイルが収容されたコイル収容部に充填されたモールド樹脂を備える内燃機関用点火装置において、前記高圧出力部は、前記２つの点火コイルから与えられた出力を一つにまとめて前記高電圧を一の点火プラグへ供給する如く備えられ、前記コイル収容部は、プラグホールの外部に配置されることを特徴とする内燃機関用点火装置とする。
In order to solve the above problems, the present invention is configured as follows. That is, in the invention of claim 1, each primary coil, comprising two ignition coils consisting of the secondary coil and the iron core, wherein the two cases where the ignition coil is accommodated, the said case, external connector and supplying power and signals from the high voltage output section for supplying a high voltage to the spark plug, is provided, the molding resin filled in the coil receiving portion in which the two ignition coils of the case is accommodated In the internal combustion engine ignition device, the high-voltage output unit is provided so as to combine outputs given from the two ignition coils and supply the high voltage to one ignition plug, and the coil housing unit The internal combustion engine ignition device is arranged outside the plug hole .

上記構成においては、前記２つの点火コイルは、各々の点火コイルが並列配置される構成としてもよい。また、前記コネクタは、前記２つの点火コイルに対して各々設けられる構成としてもよい。
In the above configuration, the two ignition coils may be configured such that the respective ignition coils are arranged in parallel . Further, the connector may be a respective provided is configured for the two ignition coils.

上記の発明によって、リーン燃焼や成層燃焼では空燃比のばらつきがあることや、点火プラグのくすぶり、経年変化によるシリンダ内部の劣化といった更なる悪条件によって起こるミスファイアも防ぐことができ、尚且つエンジンヘッドへの取り付けが容易な内燃機関用点火装置が実現できる。
The above invention can prevent misfire caused by further adverse conditions such as air-fuel ratio variation in lean combustion and stratified combustion, smoldering of spark plugs, deterioration inside the cylinder due to aging, and the like. An ignition device for an internal combustion engine that can be easily attached to the head can be realized.

本発明の第１の実施例とする点火装置の斜視図である。1 is a perspective view of an ignition device according to a first embodiment of the present invention. 図１の点火装置の矢印（ａ）方向から見たＢ−Ｂ断面図である。It is BB sectional drawing seen from the arrow (a) direction of the ignition device of FIG.

本発明の第１の実施例とする点火装置の斜視図を図１に、図１の点火装置の矢印（ａ）方向から見たＢ−Ｂ断面図を図２にそれぞれ示す。 FIG. 1 is a perspective view of an ignition device according to a first embodiment of the present invention, and FIG. 2 is a sectional view taken along line BB of the ignition device of FIG.

図１及び図２において、点火装置60の外形を形成するケース30は開口面を一面備える箱型とした一体成形で形成されている。また、当該ケース30には当該点火装置60を図示しないエンジンヘッドに取り付け固定するためのケース固定部32を当該ケース30の開口面と略垂直面に２箇所形成している。さらに、当該ケース30の底面には、高電圧を点火プラグに供給するための高圧出力部34が図示しないエンジン上部に形成されたプラグホール内に向かって突出するように形成されている。 1 and 2, the case 30 forming the outer shape of the ignition device 60 is formed by integral molding in a box shape having one opening surface. Further, the case 30 is formed with two case fixing portions 32 on the surface substantially perpendicular to the opening surface of the case 30 for fixing the ignition device 60 to an engine head (not shown). Further, a high-voltage output portion 34 for supplying a high voltage to the spark plug is formed on the bottom surface of the case 30 so as to protrude into a plug hole formed in the upper portion of the engine (not shown).

また、前記ケース30のコイル収容部には、第１の点火コイル70と第２の点火コイル80を備え、当該第１の点火コイル70及び当該第２の点火コイル80はそれぞれ個別に複数の薄板を積層して構成された鉄芯14と、当該鉄芯14の外周に樹脂で形成された１次ボビンの外周に１次巻線を５０ターン前後巻き回した１次コイル10と、当該1次コイル10の外周に樹脂で形成された２次ボビンの外周に２次巻線を３０００ターン前後巻き回した２次コイル12とから構成されている。さらに、前記ケース30内には前記第１の点火コイル70及び第２の点火コイル80へ１次電圧及び点火信号を供給するイグナイタ20が前記第１の点火コイル70及び第２の点火コイル80に個別で備えられ、当該それぞれのイグナイタ20から個別で前記第１の点火コイル70及び前記第２の点火コイル80に接続され、当該それぞれのイグナイタ20から個別で前記第１の点火コイル70及び前記第２の点火コイル80の前記１次コイル10に１次電圧及び点火信号を供給している。 The coil housing portion of the case 30 includes a first ignition coil 70 and a second ignition coil 80, and each of the first ignition coil 70 and the second ignition coil 80 is individually provided with a plurality of thin plates. An iron core 14 formed by laminating a core, a primary coil 10 in which a primary winding is wound around the outer periphery of a primary bobbin formed of resin on the outer periphery of the iron core 14, and the primary coil 10 The secondary coil 12 is formed by winding a secondary winding around 3000 turns on the outer periphery of a secondary bobbin formed of resin on the outer periphery of the coil 10. Further, an igniter 20 for supplying a primary voltage and an ignition signal to the first ignition coil 70 and the second ignition coil 80 is provided in the case 30 to the first ignition coil 70 and the second ignition coil 80. The igniter 20 is individually connected to the first ignition coil 70 and the second ignition coil 80, and the igniter 20 is individually connected to the first ignition coil 70 and the second ignition coil 80. A primary voltage and an ignition signal are supplied to the primary coil 10 of the second ignition coil 80.

また、前記ケース30の側面に図示しないバッテリ及び外部のＥＣＵ等の点火装置制御部とを接続する１次コネクタ24が前記第１の点火コイル70及び前記第２の点火コイル80それぞれに個別で備えられ、当該それそれの１次コネクタ24の一端はバッテリ及び外部のＥＣＵ等の点火装置制御部とを接続され、当該それぞれの１次コネクタ24の他端は前記第１の点火コイル70と第２の点火コイル80の前記１次コイル10と前記それぞれのイグナイタ20に個別で接続されている。さらに、前記ケース30の底面内側には、前記それぞれの点火コイル70.80の一方の高電圧が、他方の点火コイル70.80に電流が流れるのを阻止するためのダイオード22が前記第１の点火コイル70及び第２の点火コイル80のそれぞれに備えられ、当該ダイオード22の一端は前記第１の点火コイル70及び前記第２の点火コイル80の前記２次コイルと接続され、当該ダイオード22の他端は前記高圧出力部34に接続されている。 Further, a primary connector 24 for connecting a battery (not shown) and an ignition device control unit such as an external ECU (not shown) to the side surface of the case 30 is provided for each of the first ignition coil 70 and the second ignition coil 80 individually. One end of each primary connector 24 is connected to a battery and an ignition device controller such as an external ECU, and the other end of each primary connector 24 is connected to the first ignition coil 70 and the second ignition coil 70. The ignition coil 80 is individually connected to the primary coil 10 and the respective igniters 20. Further, a diode 22 for preventing a high voltage of one of the respective ignition coils 70.80 from flowing through the other ignition coil 70.80 is provided inside the bottom surface of the case 30. Provided in each of the second ignition coils 80, one end of the diode 22 is connected to the first ignition coil 70 and the secondary coil of the second ignition coil 80, and the other end of the diode 22 is connected to the second ignition coil 80. The high voltage output unit 34 is connected.

また、前記高圧出力部34は当該ダイオード22との接続を前記第１の点火オイル70及び前記第２の点火コイル80から当該ダイオード22を介して出力されたそれぞれの高電圧を１つにまとめる如く配線されている。さらに、前記ケース30内には前記点火装置10の電気的絶縁及び各部材の物理的固定を実現する如く熱硬化性のモールド樹脂50が充填されている。 Further, the high voltage output unit 34 integrates the high voltage output from the first ignition oil 70 and the second ignition coil 80 via the diode 22 into one connection with the diode 22. Wired. Further, the case 30 is filled with a thermosetting mold resin 50 so as to achieve electrical insulation of the ignition device 10 and physical fixation of each member.

また、前記第１の点火コイル70及び第２の点火コイル80からの高電圧は前記高圧出力部34から前記プラグホール内に収容された導電部材を介して前記点火プラグへ供給されている。さらに、前記第１の点火コイル70及び第２の点火コイル80は、前記プラグホール外に配置され、前記ケース固定部32と前記エンジンヘッドがネジで固定されることにより、前記点火プラグと電気的接続されている。 Further, the high voltage from the first ignition coil 70 and the second ignition coil 80 is supplied to the ignition plug from the high voltage output section 34 through a conductive member accommodated in the plug hole. Further, the first ignition coil 70 and the second ignition coil 80 are arranged outside the plug hole, and the case fixing portion 32 and the engine head are fixed with screws, so that the ignition plug and the electric ignition coil are electrically connected. It is connected.

なお上記実施例の変形例として、前記ケース30に備える前記１次コネクタ22を１つにし、バッテリからの電圧及び外部のＥＣＵ等の点火装置制御部からの制御信号を前記第１の点火コイル70及び前記第２の点火コイル80の双方に供給するようにしてもよい。また、前記イグナイタ20の数は設計事情により任意に変更してもよいし、前記点火装置60の点火制御は前記点火装置60の外部で行うようにしてもよい。さらに、前記鉄芯14は圧粉コアを用いてもよいし、前記ケース30に形成される前記ケース固定部32の形成位置及び数は設計事項により任意に変更してもよいし、前記ケースに形成される前記高圧出力部34の形成位置及び形状は設計事項により任意に変更してもよい。 As a modification of the above-described embodiment, the primary connector 22 provided in the case 30 is integrated into one, and the voltage from the battery and the control signal from the ignition device controller such as an external ECU are sent to the first ignition coil 70. And may be supplied to both of the second ignition coils 80. Further, the number of the igniters 20 may be arbitrarily changed according to design circumstances, and the ignition control of the ignition device 60 may be performed outside the ignition device 60. Further, the iron core 14 may use a dust core, and the formation position and number of the case fixing portions 32 formed on the case 30 may be arbitrarily changed according to design matters. The formation position and shape of the high-voltage output portion 34 to be formed may be arbitrarily changed according to design matters.

10：１次コイル
12：２次コイル
14：鉄芯
20：イグナイタ
22：ダイオード
24：１次コネクタ
30：ケース
32：ケース固定部
34：高圧出力部
50：モールド樹脂
60：点火装置
70：第１の点火コイル
80：第２の点火コイル 10: 1 primary coil
12: Secondary coil
14: Iron core
20: Igniter
22: Diode
24: Primary connector
30: Case
32: Case fixing part
34: High voltage output section
50: Mold resin
60: Ignition system
70: First ignition coil
80: Second ignition coil

Claims (3)

それぞれが１次コイル，２次コイル及び鉄芯からなる２つの点火コイルと、前記２つの点火コイルが収容されたケースと、を備え、
前記ケースは、外部からの電源及び信号を供給するコネクタと、点火プラグへ高電圧を供給する高圧出力部と、が備えられ、
前記ケースの前記２つの点火コイルが収容されたコイル収容部に充填されたモールド樹脂を備える内燃機関用点火装置において、
前記高圧出力部は、前記２つの点火コイルから与えられた出力を一つにまとめて前記高電圧を一の点火プラグへ供給する如く備えられ、
前記コイル収容部は、プラグホールの外部に配置されることを特徴とする内燃機関用点火装置。 Two ignition coils each comprising a primary coil , a secondary coil and an iron core, and a case containing the two ignition coils ,
The case includes a connector that supplies power and signals from the outside, and a high-voltage output unit that supplies a high voltage to the spark plug .
In an internal combustion engine ignition apparatus comprising a molding resin filled in the coil receiving portion in which the two ignition coils housed in the casing,
The high-voltage output unit is provided to combine the outputs given from the two ignition coils and supply the high voltage to one ignition plug.
The ignition device for an internal combustion engine , wherein the coil housing portion is disposed outside the plug hole . 前記２つの点火コイルは、各々の点火コイルが並列配置されていることを特徴とする請求項１に記載の内燃機関用点火装置。 The ignition device for an internal combustion engine according to claim 1, wherein each of the two ignition coils is arranged in parallel . 前記コネクタは、前記２つの点火コイルに対して各々設けられることを特徴とする請求項１又は請求項２に記載の内燃機関用点火装置。 The internal combustion engine ignition device according to claim 1 , wherein the connector is provided for each of the two ignition coils .
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JP6520189B2 (en) 2014-04-10 2019-05-29 株式会社デンソー Igniter
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JP6606856B2 (en) 2014-09-02 2019-11-20 株式会社デンソー Ignition device for internal combustion engine
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JP4691373B2 (en) * 2005-03-14 2011-06-01 日立オートモティブシステムズ株式会社 Spark ignition engine, control device used for the engine, and ignition coil used for the engine
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