JPH06200861A - Multiple ignition device - Google Patents
Multiple ignition deviceInfo
- Publication number
- JPH06200861A JPH06200861A JP34848992A JP34848992A JPH06200861A JP H06200861 A JPH06200861 A JP H06200861A JP 34848992 A JP34848992 A JP 34848992A JP 34848992 A JP34848992 A JP 34848992A JP H06200861 A JPH06200861 A JP H06200861A
- Authority
- JP
- Japan
- Prior art keywords
- ignition
- plug
- ignition coil
- coil
- current
- 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.)
- Withdrawn
Links
Landscapes
- Ignition Installations For Internal Combustion Engines (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、多重点火装置に関し、
より詳しくは、内燃機関の点火プラグの汚損防止及びプ
ラグ電極磨耗防止を図った多重点火装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multiple ignition device,
More specifically, the present invention relates to a multiple ignition system that prevents the ignition plug of an internal combustion engine from being contaminated and wear of the plug electrodes.
【０００２】[0002]
【従来の技術】従来の点火装置においては、図５に示す
ように点火プラグの点火が行われる１工程の時間（２乃
至１０ｍｓｅｃ）の間に、点火コイル（イグニッション
コイル）の１次コイルに数Ａの１次電流Ｉ11を所定の間
隔で流し、この点火コイルの２次コイルに生じる２次電
流（誘起電流）Ｉ22を所定のタイミングで点火プラグに
供給している。2. Description of the Related Art In a conventional ignition device, as shown in FIG. 5, during the time of one step (2 to 10 msec) in which the ignition of a spark plug is performed, the primary coil of an ignition coil (ignition coil) is replaced by several coils. A primary current I11 of A is supplied at a predetermined interval, and a secondary current (induced current) I22 generated in the secondary coil of this ignition coil is supplied to the spark plug at a predetermined timing.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、従来の
点火装置の場合、点火コイルの１次コイルに１次電流Ｉ
11を流すための駆動回路におけるトランジスタには、数
Ａしか流すことができず、この結果１次コイルの１次電
流Ｉ11も数Ａに制限されて、点火プラグの放電に必要な
エネルギーを得るためには点火コイルのインダクタンス
を大きくした大型の点火コイルを用いなければならなか
った。However, in the case of the conventional ignition device, the primary current I flows through the primary coil of the ignition coil.
Only a few amps can be made to flow in the transistor in the drive circuit for making 11 flow. As a result, the primary current I11 of the primary coil is also limited to a few amps to obtain the energy required to discharge the spark plug. For this, a large ignition coil with a large inductance of the ignition coil had to be used.
【０００４】また、従来の点火装置の場合、各点火プラ
グには１工程の中で１回の点火機会しか無く、点火不良
が生じるという問題もあった。Further, in the case of the conventional ignition device, there is also a problem that each ignition plug has only one chance of ignition in one process, resulting in ignition failure.
【０００５】さらに、従来の点火装置の場合、２次イン
ダクタンス値が大きいため、その２次電流Ｉ22の値を大
きくすることは困難であるので、点火プラグに付いたカ
ーボン等の付着物を除去できずプラグ汚損が生じるとい
う問題もあった。Further, in the case of the conventional ignition device, since the secondary inductance value is large, it is difficult to increase the value of the secondary current I22 thereof, so that the deposit such as carbon attached to the spark plug can be removed. There was also a problem that the plug was contaminated.
【０００６】他方、２次電流Ｉ22が大きすぎるような場
合には、点火プラグのプラグ電極の磨耗を招くという問
題が生じる。On the other hand, if the secondary current I22 is too large, the plug electrode of the spark plug may be worn.
【０００７】そこで、本発明は、プラグ汚損が無く、プ
ラグ電極の磨耗も回避でき、さらに、点火動作の向上と
点火コイルの小型化をも図ることが可能な多重点火装置
を提供することを目的とする。Therefore, the present invention is to provide a multiple ignition device which is free from plug contamination, can avoid wear of the plug electrode, and can improve the ignition operation and downsize the ignition coil. To aim.
【０００８】[0008]
【課題を解決するための手段】本発明の多重点火装置
は、内燃機関の点火プラグに対しての２次放電電流とし
て、ピーク値１５０ｍＡ乃至１Ａの電流を供給可能な点
火コイルと、この点火コイルを１回の点火動作中に、駆
動パルス幅１０μｓｅｃ乃至３００μｓｅｃで、そ繰り
返し周期８０μｓｅｃ乃至１ｍｓｅｃで複数回駆動する
パワー素子を用いた駆動手段とを有するものである。The multiple ignition device of the present invention is an ignition coil capable of supplying a current having a peak value of 150 mA to 1 A as a secondary discharge current to an ignition plug of an internal combustion engine, and this ignition. A driving unit using a power element that drives the coil a plurality of times with a driving pulse width of 10 μsec to 300 μsec and a repeating period of 80 μsec to 1 msec during one ignition operation.
【０００９】[0009]
【作用】上述した構成の多重点火装置によれば、点火プ
ラグの１回の動作時間中に、パワー素子を用いた駆動手
段により１０μｓ乃至３００μｓのパルス幅で、繰り返
し周期８０μｓｅｃ乃至１ｍｓｅｃで複数回駆動し、放
電用の２次電流としてピーク値１５０ｍＡ乃至１Ａの高
い電流密度の電流を点火プラグに供給するようにしたの
で、点火プラグの付着物を吹き飛ばすことができて放電
状態が適切となり、また、２次電流が大きすぎることも
なくプラグ電極の磨耗を抑えることができる。また、点
火プラグの１回の動作時間中に点火プラグに複数回の放
電用の電流を供給するのでこの点火プラグの点火機会が
多くなり、失火確率が減少する。According to the multiple ignition device having the above-described structure, the driving means using the power element has a pulse width of 10 μs to 300 μs and a plurality of repetition cycles of 80 μsec to 1 msec during one operation time of the spark plug. Since the current is driven and a high current density current having a peak value of 150 mA to 1 A is supplied to the spark plug as a secondary current for discharge, the deposit on the spark plug can be blown away and the discharge state becomes appropriate. Wear of the plug electrode can be suppressed without the secondary current being too large. Further, since the electric current for discharging is supplied to the spark plug a plurality of times during one operation time of the spark plug, the chance of ignition of this spark plug increases and the misfire probability decreases.
【００１０】さらに、パワー素子を用い、この点火コイ
ルの１次側に、２次電流としてピーク値１５０ｍＡ乃至
１Ａという大きな電流が得られるような１次電流を流せ
る構成とすることで、１次コイル，２次コイルの巻数を
小さくでき、これにより、点火コイルの小型化をも図る
ことが可能となる。Further, by using a power element, a primary current can be supplied to the primary side of the ignition coil so that a large secondary current of 150 mA to 1 A can be obtained as a secondary current. The number of turns of the secondary coil can be reduced, which allows the ignition coil to be downsized.
【００１１】[0011]
【実施例】以下に、本発明の実施例を詳細に説明する。EXAMPLES Examples of the present invention will be described in detail below.
【００１２】図１に示す多重点火装置１は、内燃機関の
点火プラグＰに対して放電用の２次電流Ｉ20としてピー
ク値１５０ｍＡ乃至１Ａの供給可能な点火コイルＴＲ
と、この点火コイルＴＲを１工程の点火動作時間２乃至
１０ｍｓｅｃ中に１０μｓｅｃ乃至３００μｓｅｃの駆
動パルス幅τ1 、８０μｓｅｃ乃至１ｍｓｅｃの繰り返
し周期ｔで複数回（２乃至１０回）駆動する駆動手段３
とを有している。The multiple ignition system 1 shown in FIG. 1 is capable of supplying an ignition coil TR having a peak value of 150 mA to 1 A to a spark plug P of an internal combustion engine as a secondary current I20 for discharge.
And a drive means 3 for driving the ignition coil TR a plurality of times (2 to 10 times) with a drive pulse width τ 1 of 10 μsec to 300 μsec and a repetition cycle t of 80 μsec to 1 msec during an ignition operation time of 2 to 10 msec in one step.
And have.
【００１３】駆動手段３は、前記駆動パルスを出力する
駆動回路４と、この駆動回路４に抵抗Ｒ1 を介してベー
スを接続したパワー素子（ＩＧＢＴ）２と、バイアス抵
抗Ｒ2 を具備している。The drive means 3 comprises a drive circuit 4 for outputting the drive pulse, a power element (IGBT) 2 having a base connected to the drive circuit 4 via a resistor R 1 , and a bias resistor R 2. There is.
【００１４】パワー素子２のコレクタは、前記点火コイ
ルＴＲの１次コイル５に接続し、また、パワー素子２の
エミッタは接地している。The collector of the power element 2 is connected to the primary coil 5 of the ignition coil TR, and the emitter of the power element 2 is grounded.
【００１５】前記点火コイルＴＲには、１次コイル５に
電源電圧（例えば直流１２Ｖ）ＶBが印加されるように
なっている。A power supply voltage (for example, DC 12V) VB is applied to the primary coil 5 of the ignition coil TR.
【００１６】次に、点火コイルＴＲの電磁気的な特性に
ついて考察する。Next, the electromagnetic characteristics of the ignition coil TR will be considered.
【００１７】この点火コイルＴＲの２次コイル６から点
火プラグＰに供給する放電用の２次電流Ｉ20のピーク値
を従来の場合よりも大きくするために、本実施例におい
ては、図２に示す２次電流Ｉ20のピーク値Ｉ20P を１５
０ｍＡ≦Ｉ20P ≦１Ａに設定する。In order to make the peak value of the secondary current for discharge I20 supplied from the secondary coil 6 of the ignition coil TR to the spark plug P larger than that in the conventional case, this embodiment is shown in FIG. Set the peak value I20P of the secondary current I20 to 15
Set 0 mA ≤ I20P ≤ 1A.
【００１８】このようなピーク値Ｉ20P を得るための２
次コイル６のインダクタンスＬ2 は、実験により２０ｍ
Ｈ≦Ｌ2 ≦８００ｍＨであった。2 for obtaining such a peak value I20P
The inductance L 2 of the next coil 6 is 20 m by an experiment.
H ≦ L 2 ≦ 800 mH.
【００１９】このようなピーク値Ｉ20P 、インダクタン
スＬ2 の条件を満たす１次コイル５のインダクタンスＬ
1 は巻数比ｎを例えば８０≦ｎ≦１００とすれば、Ｌ1
＝Ｌ2 ／ｎ2 より２μＨ≦Ｌ1 ≦１２５μＨとなる。The inductance L of the primary coil 5 satisfying the conditions of the peak value I 20P and the inductance L 2 as described above.
1 is L 1 when the turns ratio n is, for example, 80 ≦ n ≦ 100.
= L 2 / n 2 and 2 μH ≦ L 1 ≦ 125 μH.
【００２０】この１次コイル５のインダクタンスＬ1 の
値を基に駆動パルス幅τ1 を求める。The drive pulse width τ 1 is obtained based on the value of the inductance L 1 of the primary coil 5.
【００２１】１次コイル５に蓄積されるエネルギーＥを
６ｍＪ≦Ｅ≦３０ｍＪとすると、Ｅ＝１／２・Ｌ1 ・Ｉ
10P 2 の式から、[0021] The energy E accumulated in the primary coil 5 and 6mJ ≦ E ≦ 30mJ, E = 1/2 · L 1 · I
From the formula of 10P 2 ,
【数１】 となる。[Equation 1] Becomes
【００２２】また、Ｉ10P ＝ＶB ・τ1 ／Ｌ1 であるか
ら、Since I10P = VBτ 1 / L 1 ,
【数２】 となり、この式を計算すると、[Equation 2] And when this formula is calculated,
【数３】 を得る。[Equation 3] To get
【００２３】次に繰り返し周期ｔは、図２に示されてい
るように駆動パルス幅τ1 と、火花放電時間τ2 及び休
止期間τ3 の和で表わされる。Next, the repetition period t is represented by the sum of the driving pulse width τ 1 , the spark discharge time τ 2 and the rest period τ 3 as shown in FIG.
【００２４】また、火花放電時間τ2 は、２次電流Ｉ20
P 、蓄積エネルギーＥ、２次電圧Ｖ20P により表わさ
れ、τ2 ＝（２・η・Ｅ）／（Ｖ20P ・Ｉ20P ） （但
しηは点火コイルの一次，二次間の伝送効率）となり、
結局、Further, the spark discharge time τ 2 is the secondary current I 20
Represented by P, stored energy E, and secondary voltage V20P, τ 2 = (2 · η · E) / (V20P · I20P) (where η is the transmission efficiency between the primary and secondary of the ignition coil),
After all,
【数４】 となる。[Equation 4] Becomes
【００２５】次に、休止期間τ3 は、駆動パルス幅τ1
と、火花放電時間τ2 の重なりを防ぐために設定され、
最低５０μｓｅｃ程度とするのが普通である。また、６
００μｓｅｃ乃至７００μｓｅｃ以上と設定した場合、
火花放電間隔が長くなりすぎて、多重点火の効果が薄れ
るという問題点がある。Next, during the rest period τ 3 , the drive pulse width τ 1
And is set to prevent the spark discharge time τ 2 from overlapping,
It is usually about 50 μsec at the minimum. Also, 6
When set to 00 μsec to 700 μsec or more,
There is a problem that the spark discharge interval becomes too long and the effect of multiple ignition diminishes.
【００２６】以上、考慮すると、Considering the above,
【数５】 を得る。[Equation 5] To get
【００２７】上述した構成の多重点火装置１によれば、
図４に示すように１回の点火動作時間中に、パワー素子
２を用いた駆動手段４により、τ1 ＝１０μｓｅｃ乃至
３００μｓｅｃの駆動パルス幅で、τ2 ＝８０μｓｅｃ
乃至１ｍｓｅｃの繰り返し周期で点火コイルＰを複数回
駆動し、放電用の２次電流Ｉ20のピーク値Ｉ20P ＝１５
０ｍＡ乃至１Ａの高い電流密度の電流点火プラグＰに供
給するようにしたので、点火プラグＰのカーボン等の付
着物を吹き飛ばすことができる。即ち、図３に示すよう
に点火プラグＰのプラグ汚損に関しては良好な結果が得
られる。According to the multiple ignition device 1 having the above-mentioned structure,
As shown in FIG. 4, during one ignition operation time, by the driving means 4 using the power element 2, with a driving pulse width of τ 1 = 10 μsec to 300 μsec, τ 2 = 80 μsec.
The ignition coil P is driven a plurality of times at a repetition cycle of 1 msec to a peak value I20P = 15 of the secondary current I20 for discharge.
Since the current is supplied to the current ignition plug P having a high current density of 0 mA to 1 A, it is possible to blow off the deposit such as carbon on the ignition plug P. That is, as shown in FIG. 3, a good result is obtained regarding the plug contamination of the ignition plug P.
【００２８】これにより点火プラグＰの放電状態が適切
となる。As a result, the discharge state of the spark plug P becomes appropriate.
【００２９】また、点火プラグＰの１回の点火動作時間
中に複数回の放電用の２次電流Ｉ20を供給するので点火
プラグＰの点火機会が多くなり、失火確率が減少する。Further, since the secondary current I20 for discharging is supplied a plurality of times during one ignition operation time of the spark plug P, the number of ignition opportunities of the spark plug P increases and the misfire probability decreases.
【００３０】さらに、パワー素子２を用い、点火コイル
ＴＲの１次コイル５のインダクタンスＬ1 、２次コイル
６のインダクタンスＬ2 を上述したように設定すること
で、１次コイル５，２次コイル６の巻数を従来例よりも
小さくでき、これにより、点火コイルＴＲの構成の小型
化をも図ることが可能となる。Furthermore, using the power element 2, the inductance L 2 of the inductance L 1, 2 primary coil 6 of the primary coil 5 of the ignition coil TR By setting as described above, the primary coil 5,2 secondary coil The number of turns of 6 can be made smaller than that of the conventional example, and thereby, the configuration of the ignition coil TR can be downsized.
【００３１】本発明は、上述した実施例に限定されるも
のではなく、その要旨の範囲内で種々の変形が可能であ
る。The present invention is not limited to the above-mentioned embodiments, but various modifications can be made within the scope of the invention.
【００３２】[0032]
【発明の効果】以上詳述した本発明によれば、上述した
構成としたので、プラグ汚損が無く、プラグ電極の磨耗
も回避でき、さらに、点火動作の向上と点火コイルの小
型化をも図ることが可能な多重点火装置を提供すること
ができる。According to the present invention, which has been described in detail above, since it has the above-mentioned configuration, there is no contamination of the plug, abrasion of the plug electrode can be avoided, and further, the ignition operation is improved and the ignition coil is downsized. It is possible to provide a multiple ignition device capable of
【図１】本発明の実施例装置の回路図FIG. 1 is a circuit diagram of an apparatus according to an embodiment of the present invention.
【図２】本発明の実施例装置における１次電流、２次電
圧、２次電流の波形図FIG. 2 is a waveform diagram of a primary current, a secondary voltage, and a secondary current in the device of the embodiment of the present invention.
【図３】本発明の実施例装置の２次電流と、プラグ汚
損、プラグ電極の磨耗との関係を示す図FIG. 3 is a diagram showing the relationship between the secondary current, the plug fouling, and the wear of the plug electrode of the device according to the embodiment of the present invention.
【図４】本発明の実施例装置の１次電流、２次電流の波
形図FIG. 4 is a waveform diagram of a primary current and a secondary current of a device according to an embodiment of the present invention.
【図５】従来装置の１次電流、２次電流の波形図FIG. 5 is a waveform diagram of a primary current and a secondary current of a conventional device.
１ 多重点火装置 ２ パワー素子 ３ 駆動手段 ５ １次コイル ６ ２次コイル ＴＲ 点火コイル Ｐ 点火プラグ 1 Multiple Ignition Device 2 Power Element 3 Driving Means 5 Primary Coil 6 Secondary Coil TR Ignition Coil P Spark Plug
Claims (1)
電電流として、ピーク値１５０ｍＡ乃至１Ａの電流を供
給可能な点火コイルと、この点火コイルを１回の点火動
作中に、駆動パルス幅１０μｓｅｃ乃至３００μｓｅｃ
で、その繰り返し周期８０μｓｅｃ乃至１ｍｓｅｃで複
数回駆動するパワー素子を用いた駆動手段とを有するこ
とを特徴とする多重点火装置。1. An ignition coil capable of supplying a current having a peak value of 150 mA to 1 A as a secondary discharge current to an ignition plug of an internal combustion engine, and a drive pulse width during one ignition operation of the ignition coil. 10 μsec to 300 μsec
And a driving means using a power element that is driven a plurality of times with a repetition cycle of 80 μsec to 1 msec.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP34848992A JPH06200861A (en) | 1992-12-28 | 1992-12-28 | Multiple ignition device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP34848992A JPH06200861A (en) | 1992-12-28 | 1992-12-28 | Multiple ignition device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH06200861A true JPH06200861A (en) | 1994-07-19 |
Family
ID=18397358
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP34848992A Withdrawn JPH06200861A (en) | 1992-12-28 | 1992-12-28 | Multiple ignition device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH06200861A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008166580A (en) * | 2006-12-28 | 2008-07-17 | Diamond Electric Mfg Co Ltd | Ignition coil for multiple ignition |
| JP2009156251A (en) * | 2007-08-23 | 2009-07-16 | Denso Corp | Plasma type ignition device |
| JP2009537730A (en) * | 2006-05-18 | 2009-10-29 | ノース−ウエスト ユニヴァーシティ | Ignition device |
-
1992
- 1992-12-28 JP JP34848992A patent/JPH06200861A/en not_active Withdrawn
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009537730A (en) * | 2006-05-18 | 2009-10-29 | ノース−ウエスト ユニヴァーシティ | Ignition device |
| US8567372B2 (en) | 2006-05-18 | 2013-10-29 | North-West University | Ignition system |
| KR101448042B1 (en) * | 2006-05-18 | 2014-10-13 | 노스-웨스트 유니버시티 | Ignition system |
| JP2015180822A (en) * | 2006-05-18 | 2015-10-15 | ノース−ウエスト ユニヴァーシティ | Ignition system |
| JP2008166580A (en) * | 2006-12-28 | 2008-07-17 | Diamond Electric Mfg Co Ltd | Ignition coil for multiple ignition |
| JP2009156251A (en) * | 2007-08-23 | 2009-07-16 | Denso Corp | Plasma type ignition device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A300 | Withdrawal of application because of no request for examination |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 20000307 |