JPH04148073A - Spark plug for internal combustion engine - Google Patents
Spark plug for internal combustion engineInfo
- Publication number
- JPH04148073A JPH04148073A JP2270617A JP27061790A JPH04148073A JP H04148073 A JPH04148073 A JP H04148073A JP 2270617 A JP2270617 A JP 2270617A JP 27061790 A JP27061790 A JP 27061790A JP H04148073 A JPH04148073 A JP H04148073A
- Authority
- JP
- Japan
- Prior art keywords
- diode
- ignition coil
- ion current
- ignition
- combustion engine
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000002485 combustion reaction Methods 0.000 title claims description 17
- 238000001514 detection method Methods 0.000 claims abstract description 15
- 230000002265 prevention Effects 0.000 claims description 11
- 239000003990 capacitor Substances 0.000 abstract description 5
- 239000000463 material Substances 0.000 abstract description 3
- 239000000446 fuel Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02P—IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES
- F02P17/00—Testing of ignition installations, e.g. in combination with adjusting; Testing of ignition timing in compression-ignition engines
- F02P17/12—Testing characteristics of the spark, ignition voltage or current
- F02P2017/125—Measuring ionisation of combustion gas, e.g. by using ignition circuits
Landscapes
- Ignition Installations For Internal Combustion Engines (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
この発明は、内燃機関用点火装置に関し、特に高圧対策
がなされた点火コイルユニットを有する内燃機関用点火
装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an ignition device for an internal combustion engine, and more particularly to an ignition device for an internal combustion engine having an ignition coil unit that takes measures against high pressure.
［゛従来の技術］
第２図は従来の内燃機関用点火装置を示す構成図である
０図において、（１）は点火プラグ、（２）はイオン電
流検出用ダイオード（３）を含む接続機器であって、点
火プラグ（１）の−側は接地され、他側は接続機器（２
）を介して点火コイルユニット（４）の外部接続端子（
５）に接続されると共に接続機器（２）のイオン電流検
出用ダイオード（３）、抵抗器（６）を介して直流電源
（７）の負電極に接続される。又、イオン電流検出用ダ
イオード（３）のカソード側はコンデンサ（８）及び抵
抗器（９）を介して接地される。そしてコンデンサ（８
）と抵抗器（９）の接続点よりイオン電流検出信号出力
用の出力端子（１０）が取り出される。[Prior Art] Fig. 2 is a block diagram showing a conventional ignition system for an internal combustion engine. The - side of the spark plug (1) is grounded, and the other side is connected to the connected device (2).
) of the ignition coil unit (4) via the external connection terminal (
5), and is also connected to the negative electrode of a DC power source (7) via the ion current detection diode (3) and resistor (6) of the connected device (2). Further, the cathode side of the ion current detection diode (3) is grounded via a capacitor (8) and a resistor (9). and a capacitor (8
) and the resistor (9), an output terminal (10) for outputting an ion current detection signal is taken out.
点火コイルユニット（４）は高圧の材料を用いて高圧対
策がなされており、点火コイル（１１）及び逆流防止用
ダイオード（１２）を含む１点火コイル（１１）の１次
側の一端はプラス端子（１３）を介して電源に接続され
、他端はマイナス端子（１４）を介してパワートランジ
スタ（１５）のコレクタに接続される。パワートランジ
スタ（１５）のエミッタは接地され、そのベースは燃料
噴射時期・点火時期コントロールユニット（図示せず）
からの制御信号が供給される入力端子（１６）に接続さ
れる。The ignition coil unit (4) is made of high-voltage material to prevent high voltage, and one end of the primary side of the ignition coil (11), which includes the ignition coil (11) and the backflow prevention diode (12), is connected to a positive terminal. (13), and the other end is connected to the collector of a power transistor (15) via a negative terminal (14). The emitter of the power transistor (15) is grounded, and its base is a fuel injection timing/ignition timing control unit (not shown).
The input terminal (16) is connected to an input terminal (16) to which a control signal is supplied.
次に、第２図に示した従来の内燃機関用点火装置の動作
について説明する。内燃機関の回転に同期して燃料噴射
時期・点火時期コントロールユニトによりパワートラン
ジスタ（１５）が制御されてオフすると、点火コイル（
１１）の１次側に逆起電力が発生し、これに応じて２次
側に負の高電圧が発生し、この負の高電圧がダイオード
（１２）を介して点火プラグ（１）に供給され、これに
より点火プラグが点火する。この点火プラグ（１）の点
火により図示せずも内燃機関の気筒内の混合気が燃焼す
ると、イオン電流が発生し、このイオン電流がイオン電
流検出用ダイオード（３）を介して出力端子（１０）に
検出される。Next, the operation of the conventional ignition system for an internal combustion engine shown in FIG. 2 will be explained. When the power transistor (15) is controlled and turned off by the fuel injection timing/ignition timing control unit in synchronization with the rotation of the internal combustion engine, the ignition coil (
11) A back electromotive force is generated on the primary side, and in response, a negative high voltage is generated on the secondary side, and this negative high voltage is supplied to the spark plug (1) via the diode (12). This causes the spark plug to ignite. When the air-fuel mixture in the cylinder of the internal combustion engine (not shown) burns due to the ignition of the spark plug (1), an ion current is generated, and this ion current is passed through the ion current detection diode (3) to the output terminal (10 ) is detected.
［発明が解決しようとする課題］
従来の内燃機関用点火装置は以上のように、イオン電流
検出用ダイオード（３）を含む高耐圧の接続機器（２）
を別途膜けなければならないので、構成が複雑で高価と
なり、しかも接続機器を有するため、高圧のケーブルの
レイオウトが複雑となるという問題点があった。[Problems to be Solved by the Invention] As described above, the conventional ignition device for an internal combustion engine has a high voltage connection device (2) including an ionic current detection diode (3).
Since the cable must be separately coated, the structure becomes complicated and expensive, and since it includes connecting equipment, the layout of the high-voltage cable becomes complicated.
この発明は上記のような問題点を解決するためになされ
たもので、構成が簡単で廉価であり、しかも高圧のケー
ブルのレイオウトが簡単な内燃機関用点火装置を得るこ
とを目的とする。The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to obtain an ignition device for an internal combustion engine that has a simple configuration, is inexpensive, and has a simple layout of high-voltage cables.
［課題を解決するための手段］
この発明に係る内燃機関用点火装置は、点火コイル及び
この点火コイルの２次側に接続された逆流防止用ダイオ
ードを含む点火コイルユニットを備えた内燃機関用点火
装置において、上記逆流防止用ダイオードと分岐するイ
オン電流検出用ダイオードを上記点火コイルユニットに
内蔵させたものである。[Means for Solving the Problems] An ignition device for an internal combustion engine according to the present invention includes an ignition coil unit including an ignition coil and a backflow prevention diode connected to the secondary side of the ignition coil. In the device, an ion current detection diode that branches off from the backflow prevention diode is built into the ignition coil unit.
［作用］
この発明においては、イオン電流検出用ダイオードを点
火コイルユニットに内蔵させて、コンパクト化を図る。[Function] In the present invention, the ion current detection diode is built into the ignition coil unit to achieve compactness.
［実施例コ
以下、この発明の一実施例を図について説明する。第１
図はこの発明の一実施例を示す構成図であり、（１）、
（３）、（５）〜（１６）は前述と同様のものである。[Example 1] An example of the present invention will be described below with reference to the drawings. 1st
The figure is a configuration diagram showing one embodiment of the present invention, (1),
(3), (5) to (16) are the same as described above.
本実施例では第２図で用いた点火コイルユニット（４）
の代わりに点火コイルユニット（４Ａ）を用いる。この
点火コイルユニット（４Ａ）は、上述同様高圧の材料で
作られて高圧対策がなされており、点火コイル（１１）
、逆流防止用ダイオード（１２）の外にイオン電流検出
用ダイオード（３）を含む、イオン電流検出用ダイオー
ド（３）のアノードは逆流防止用ダイオード（１２）の
アノードと外部接続端子（５〉の接続点に接続されて分
岐され、イオン電流検出用ダイオード（３）のカソード
は信号出力端子（１７）に接続され、この信号出力端子
（１７）が抵抗器（６）とコンデンサ（８）の接続点に
接続される。そして外部接続端子（５）は直接点火プラ
グ（１）の−側に接続される。In this example, the ignition coil unit (4) used in Fig. 2
Use an ignition coil unit (4A) instead. This ignition coil unit (4A) is made of high-pressure material as described above to take measures against high pressure, and the ignition coil (11)
, includes an ion current detection diode (3) in addition to the backflow prevention diode (12), and the anode of the ion current detection diode (3) is connected to the anode of the backflow prevention diode (12) and the external connection terminal (5>). The cathode of the ion current detection diode (3) is connected to the signal output terminal (17), and this signal output terminal (17) is connected to the connection point of the resistor (6) and capacitor (8). The external connection terminal (5) is directly connected to the - side of the spark plug (1).
次に、第１図に示したこの発明の一実施例の動作につい
て説明する。内燃機関の回転に同期して燃料噴射時期・
点火時期コントロールユニットによりパワートランジス
タ（１５）がｌＩＪ御されてオフすると、点火コイル（
１１）の１次側に逆起電力が発生し、これに応じて２次
側に負の高電圧が発生し、この負の高電圧がダイオード
（１２）を介して点火プラグ（１）に供給され、これに
より点火プラグが点火する。この点火プラグ（１）の点
火により図示せずも内燃機関の気筒内の混合気が燃焼す
ると、イオン電流が発生し、このイオン電流がイオン電
流検出用ダイオード（３）を介して出力端子（１０）に
検出される。Next, the operation of the embodiment of the present invention shown in FIG. 1 will be explained. Fuel injection timing is synchronized with the rotation of the internal combustion engine.
When the power transistor (15) is controlled by the ignition timing control unit and turned off, the ignition coil (
11) A back electromotive force is generated on the primary side, and in response, a negative high voltage is generated on the secondary side, and this negative high voltage is supplied to the spark plug (1) via the diode (12). This causes the spark plug to ignite. When the air-fuel mixture in the cylinder of the internal combustion engine (not shown) burns due to the ignition of the spark plug (1), an ion current is generated, and this ion current is passed through the ion current detection diode (3) to the output terminal (10 ) is detected.
［発明の効果コ
以上のようにこの発明によれば、点火コイル及びこの点
火コイルの２次側に接続された逆流防止用ダイオード、
を含む点火コイルユニットを備えた内燃機関用点火装置
において、上記逆流防止用ダイオードと分岐するイオン
電流検出用ダイオードを上記点火コイルユニットに内蔵
させたので、構成が簡単で廉価となり、しかも高圧のケ
ーブルのレイオウトが簡単な内燃機関用点火装置が得ら
れる効果がある。[Effects of the Invention] As described above, according to the present invention, an ignition coil and a backflow prevention diode connected to the secondary side of the ignition coil,
In an ignition system for an internal combustion engine equipped with an ignition coil unit including the above-mentioned backflow prevention diode, the ion current detection diode branching off from the above-mentioned backflow prevention diode is built into the above-mentioned ignition coil unit, so the configuration is simple and inexpensive, and moreover, the high-voltage cable can be used. This has the effect of providing an ignition system for an internal combustion engine with a simple layout.
第１図はこの発明の一実施例を示す構成図、第２図は従
来の内燃機関用点火装置を示す構成図である。
図において、（３）はイオン電流検出用ダイオード、（
４Ａ）は点火コイルユニット、（１１）は点火コイル、
（１２）は逆流防止用ダイオードである。
尚、図中、同一符号は同−又は相当部分を示す。FIG. 1 is a block diagram showing an embodiment of the present invention, and FIG. 2 is a block diagram showing a conventional ignition system for an internal combustion engine. In the figure, (3) is the ion current detection diode, (
4A) is an ignition coil unit, (11) is an ignition coil,
(12) is a backflow prevention diode. In the drawings, the same reference numerals indicate the same or corresponding parts.
Claims (1)
流防止用ダイオードを含む点火コイルユニットを備えた
内燃機関用点火装置において、上記逆流防止用ダイオー
ドと分岐するイオン電流検出用ダイオードを上記点火コ
イルユニットに内蔵させたことを特徴とする内燃機関用
点火装置。In an ignition device for an internal combustion engine, which includes an ignition coil unit including an ignition coil and a backflow prevention diode connected to the secondary side of the ignition coil, the ion current detection diode branched from the backflow prevention diode is connected to the ignition coil. An ignition device for an internal combustion engine, characterized in that it is built into a unit.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2270617A JPH04148073A (en) | 1990-10-11 | 1990-10-11 | Spark plug for internal combustion engine |
| KR1019910016137A KR950000221B1 (en) | 1990-09-27 | 1991-09-16 | Ignition apparatus for internal combustion engine |
| US07/764,594 US5144936A (en) | 1990-09-27 | 1991-09-24 | Ignition apparatus for internal combustion engine |
| DE4132124A DE4132124C2 (en) | 1990-09-27 | 1991-09-26 | Ignition device for an internal combustion engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2270617A JPH04148073A (en) | 1990-10-11 | 1990-10-11 | Spark plug for internal combustion engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04148073A true JPH04148073A (en) | 1992-05-21 |
Family
ID=17488583
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2270617A Pending JPH04148073A (en) | 1990-09-27 | 1990-10-11 | Spark plug for internal combustion engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04148073A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5617032A (en) * | 1995-01-17 | 1997-04-01 | Ngk Spark Plug Co., Ltd. | Misfire detecting device for internal combustion engine |
| GB2396187A (en) * | 2002-11-01 | 2004-06-16 | Visteon Global Tech Inc | I.c. engine in-cylinder ionization detection system with ionization detection circuit and ignition coil driver circuit integrated into a single package |
-
1990
- 1990-10-11 JP JP2270617A patent/JPH04148073A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5617032A (en) * | 1995-01-17 | 1997-04-01 | Ngk Spark Plug Co., Ltd. | Misfire detecting device for internal combustion engine |
| GB2396187A (en) * | 2002-11-01 | 2004-06-16 | Visteon Global Tech Inc | I.c. engine in-cylinder ionization detection system with ionization detection circuit and ignition coil driver circuit integrated into a single package |
| GB2396187B (en) * | 2002-11-01 | 2005-03-23 | Visteon Global Tech Inc | A device for reducing the part count and package size of an in-cylinder ionization detection system |
| US7063079B2 (en) | 2002-11-01 | 2006-06-20 | Visteon Global Technologies, Inc. | Device for reducing the part count and package size of an in-cylinder ionization detection system by integrating the ionization detection circuit and ignition coil driver into a single package |
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