JPS6341429B2 - - Google Patents
Info
- Publication number
- JPS6341429B2 JPS6341429B2 JP55090363A JP9036380A JPS6341429B2 JP S6341429 B2 JPS6341429 B2 JP S6341429B2 JP 55090363 A JP55090363 A JP 55090363A JP 9036380 A JP9036380 A JP 9036380A JP S6341429 B2 JPS6341429 B2 JP S6341429B2
- Authority
- JP
- Japan
- Prior art keywords
- spark plug
- current
- insulation resistance
- circuit
- spark
- 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.)
- Expired
Links
- 238000009413 insulation Methods 0.000 claims description 16
- 238000001514 detection method Methods 0.000 claims description 7
- 230000007423 decrease Effects 0.000 claims description 6
- 238000010586 diagram Methods 0.000 description 8
- 230000000630 rising effect Effects 0.000 description 5
- 230000005856 abnormality Effects 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 239000012212 insulator Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
- G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
- G01R27/025—Measuring very high resistances, e.g. isolation resistances, i.e. megohm-meters
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Electric Properties And Detecting Electric Faults (AREA)
- Ignition Installations For Internal Combustion Engines (AREA)
- Spark Plugs (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Description
【発明の詳細な説明】
本発明は内燃機関に装着された点火プラグの絶
縁抵抗の低下を検出する装置にかかわる。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for detecting a decrease in insulation resistance of a spark plug installed in an internal combustion engine.
点火コイルの高圧がわ回路には、第１図に示す
如く、火花放電時に、はじめ回路の浮遊容量を充
電するためなどによりランプ状の立上り電流I1が
生じ、つづいて波状の火花放電々流I2が流れる。
これらの電流I1およびI2の大きさは、点火プラグ
が汚損しておらず正常であるときはたとえば立上
り電流I1が数ミリアンペア、放電々流I2が数十ミ
リアンペア程度であるが、点火プラグが汚れ絶縁
抵抗が火花放電の発生限界である１メガオーム程
度に低下した場合、漏洩成分が増大するため立上
り電流I1はi1の如く10ミリアンペア程度に増大し、
また第２図に示す如く点火プラグ絶縁体２′の先
端部に汚れ３′が付着し、取付金具１′の奥で火花
放電４′がなされているときは、汚れ３′が抵抗と
なるため火花放電々流I2のピーク値はi2の如く20
ミリアンペア程度に低下する。 As shown in Figure 1, in the high-voltage side circuit of the ignition coil, when a spark discharges, a ramp-shaped rising current I1 is first generated to charge the stray capacitance of the circuit, and then a wave-shaped spark discharge current I1 is generated. I 2 flows.
The magnitudes of these currents I 1 and I 2 are, for example, when the spark plug is not contaminated and normal, the rise current I 1 is several milliamps, and the discharge current I 2 is about several tens of milliamps, but when the ignition plug is If the plug gets dirty and the insulation resistance drops to about 1 megohm, which is the limit for spark discharge, the leakage component will increase, so the rising current I1 will increase to about 10 milliamps, as shown in i1 .
In addition, as shown in Fig. 2, when dirt 3' adheres to the tip of the spark plug insulator 2' and spark discharge 4' occurs deep inside the mounting bracket 1', the dirt 3' acts as a resistance. The peak value of the spark discharge current I 2 is 20 as i 2
It drops to about milliampere.
本発明は、上記点火コイルの高圧がわ回路に生
じる立上り電流I1および火花放電々流I2を測定
し、これら電流I1およびI2が設点範囲外の値とな
つたときを点火プラグの絶縁抵抗の低下として検
出することを構成とし、機関の運転中に点火プラ
グの汚損、損傷などが検出できる点火プラグの絶
縁抵抗低下検出装置の提供を目的とする。 The present invention measures the rising current I 1 and spark discharge current I 2 generated in the high voltage side circuit of the ignition coil, and determines when these currents I 1 and I 2 reach values outside the setting range by plugging the spark plug into the spark plug. The object of the present invention is to provide a spark plug insulation resistance drop detection device that detects a drop in insulation resistance of a spark plug, and is capable of detecting dirt, damage, etc. of a spark plug during engine operation.
つぎに本発明を第３図ないし第５図に示す一実
施例に基づき説明する。 Next, the present invention will be explained based on an embodiment shown in FIGS. 3 to 5.
第３図は内燃機関点火回路を示し、Ｖはバツテ
リ、Ｅは点火コイル、Ｂは断続器、Ｐは点火プラ
グ、２０は点火コイルＥの高圧側巻線e1とアース
との間に挿入した電流検出用抵抗、１０は高圧側
巻線e1と抵抗２０の接続点Ａの電圧を検出する本
実施例の点火プラグの絶縁抵抗低下検出装置であ
る。第４図は点火プラグの絶縁抵抗低下検出装置
１０の構成回路例を示すブロツク図であり、１は
第５図イ波形図に示すＡ点の電流を入力し、放
電々流がたとえば30ミリアンペア以上のとき第５
図ロに示すハイレベルの出力する電圧比較回路、
２は火花放電が正常に行なわれているとき表示装
置の表示を消去するためのパルス発生用単安定マ
ルチバイブレータであり、電圧比較回路１の出力
を入力して第５図ハに示す出力パルスを生ずる。
３は断続器Ｂの開閉信号を入力して火花放電電流
検出区間第５図ニに示すハイレベルの出力を発す
る単安定マルチバイブレータ、４は該単安定マル
チバイブレータ３の出力をトリガとして第５図ホ
に示す異常表示パルスを発生する単安定マルチバ
イブレータ、５は単安定マルチバイブレータ２の
出力がベースに入力され、コレクタが単安定マル
チバイブレータ４に接続されたトランジスタなど
のスイツチ素子であり、第５図イの示す如く火花
放電が点火プラグ絶縁体と取付金具との間隙の奥
でなされ、火花放電々流I2が30ミリアンペア以下
のとき第５図ヘに示す出力を生じる。６はスイツ
チ素子５の出力を入力し、ハイレベルの出力があ
つたとき異常放電表示を行う表示装置である。７
はＡ点の電流がたとえば７ミリアンペア以上のと
きハイレベルの出力をする電圧比較回路であり第
５図イに示す火花放電々流を入力して第５図トに
示す出力を生じる。８は断続器Ｂの開閉信号をト
リガとし、立上り電流I1の生じている間ハイレベ
ルの出力を生じる単安定マルチバイブレータであ
り第５図チに示すパルスを出力する。９は上記電
流比較回路７の出力と単安定マルチバイブレータ
８の出力とを入力するアンド回路であり、第５図
イに示すｅの如く点火栓の絶縁抵抗が低下し、立
上り電流I1が設定値以上となると第５図リに示す
如く出力パルスを発生する。１１はアンド回路９
の出力を入力する表示装置であり、アンド回路９
がハイレベルの出力を生じたとき、点火プラグの
絶縁抵抗低下表示を行う。 Figure 3 shows the internal combustion engine ignition circuit, where V is the battery, E is the ignition coil, B is the interrupter, P is the spark plug, and 20 is inserted between the high voltage side winding e1 of the ignition coil E and the ground. A current detection resistor 10 is a device for detecting a decrease in insulation resistance of the spark plug of this embodiment, which detects the voltage at the connection point A between the high voltage side winding e1 and the resistor 20. FIG. 4 is a block diagram showing an example of the circuit configuration of the spark plug insulation resistance drop detection device 10, in which 1 inputs the current at point A shown in the waveform diagram of FIG. When the fifth
A voltage comparator circuit that outputs a high level as shown in Figure B,
2 is a monostable multivibrator for generating pulses for erasing the display on the display device when spark discharge is occurring normally; it inputs the output of the voltage comparator circuit 1 and generates the output pulse shown in FIG. arise.
3 is a monostable multivibrator which inputs the opening/closing signal of interrupter B and emits a high-level output shown in FIG. A monostable multivibrator that generates the abnormality display pulse shown in E, 5 is a switch element such as a transistor whose base receives the output of the monostable multivibrator 2, and whose collector is connected to the monostable multivibrator 4; As shown in Figure A, a spark discharge occurs deep within the gap between the spark plug insulator and the mounting bracket, and when the spark discharge current I2 is less than 30 milliamps, the output shown in Figure 5F is produced. Reference numeral 6 denotes a display device which inputs the output of the switch element 5 and displays an abnormal discharge when a high level output is received. 7
5 is a voltage comparator circuit which outputs a high level output when the current at point A is, for example, 7 milliamps or more, and when the spark discharge current shown in FIG. 5A is inputted, the output shown in FIG. 5G is produced. Reference numeral 8 designates a monostable multivibrator which is triggered by the opening/closing signal of the interrupter B and outputs a high level output while the rising current I1 is generated, and outputs the pulse shown in FIG. 5H. 9 is an AND circuit which inputs the output of the current comparison circuit 7 and the output of the monostable multivibrator 8, and as shown in e in Fig. 5A, the insulation resistance of the spark plug decreases and the rising current I1 is set. When the value exceeds the value, an output pulse is generated as shown in FIG. 11 is AND circuit 9
This is a display device that inputs the output of the AND circuit 9.
When a high-level output occurs, a low spark plug insulation resistance display is displayed.
なお点火方式はCDIおよびフライホイールマグ
ネツト方式であつても、高圧側コイルの電流値を
測定できるようにすれば本発明を適用することが
できる。 Note that even if the ignition system is a CDI or flywheel magnet system, the present invention can be applied as long as the current value of the high voltage side coil can be measured.
以上の如く本発明は、点火コイルの高圧がわ回
路に流れる電流を測定し、点火プラグの絶縁抵抗
が正常なときの電流と比較して点火プラグの絶縁
抵抗の低下を検出しているので、機関に装着され
ている点火プラグの汚損および火花放電の異常な
どを機関運転中に検出でき、車両に備品として装
着することが可能であり、さらにはエンジン停止
等のトラブルの事前回避のため、点火プラグの汚
損時に空燃比を下げプラグの自己浄化を促進され
る場合などの用途に適する。 As described above, the present invention measures the current flowing in the high voltage side circuit of the ignition coil and detects a decrease in the insulation resistance of the spark plug compared to the current when the insulation resistance of the spark plug is normal. It can detect dirt on the spark plug installed in the engine and abnormalities in spark discharge while the engine is running, and can be installed as equipment in the vehicle.Furthermore, it can be used to detect ignition plugs installed in the engine to prevent troubles such as engine stoppages. Suitable for applications such as when the air-fuel ratio is lowered to promote self-cleaning of the plug when the plug is contaminated.
また従来の点火プラグの絶縁抵抗測定装置では
高圧ダイオードと抵抗測定用電源を用いて、点火
プラグに測定用の電圧を直接印加することから点
火プラグの絶縁抵抗が低下し易くなる欠点があつ
たが、本発明装置はかかる不具合を有利に解消す
る効果を有する。 In addition, conventional spark plug insulation resistance measuring devices use a high-voltage diode and a resistance measurement power source to directly apply measurement voltage to the spark plug, which has the disadvantage that the insulation resistance of the spark plug tends to decrease. , the device of the present invention has the effect of advantageously eliminating such problems.
第１図は点火回路の高圧側回路に生ずる電流波
形図、第２図は点火プラグの要部の断面図、第３
図は点火回路の概略図、第４図は本発明の点火プ
ラグの絶縁抵抗低下検出装置のブロツク図、第５
図は電流または電圧の波形図である。
図中 １０…点火プラグの絶縁抵抗低下検出装
置、２０…検出抵抗、１，７…電圧比較回路、
２，３，４，８…単安定マルチバイブレータ、９
…アンド回路、５…スイツチ素子、６，１１…表
示装置。
Figure 1 is a current waveform diagram generated in the high voltage side circuit of the ignition circuit, Figure 2 is a sectional view of the main parts of the spark plug, and Figure 3 is a diagram of the current waveform generated in the high voltage side circuit of the ignition circuit.
The figure is a schematic diagram of the ignition circuit, Figure 4 is a block diagram of the spark plug insulation resistance drop detection device of the present invention, and Figure 5 is a schematic diagram of the ignition circuit.
The figure is a current or voltage waveform diagram. In the figure 10... Spark plug insulation resistance drop detection device, 20... Detection resistor, 1, 7... Voltage comparison circuit,
2, 3, 4, 8...monostable multivibrator, 9
...AND circuit, 5...Switch element, 6, 11... Display device.
Claims (1)
電流または／および火花放電々流を測定し、それ
ぞれ正常時の浮遊容量充電々流または／および火
花放電々流と比較して絶縁抵抗の低下を検出する
点火プラグの絶縁抵抗低下検出装置。1. Measure the stray capacitance charging current and/or spark discharge current generated in the high voltage side circuit of the ignition circuit, and detect a decrease in insulation resistance by comparing with the stray capacitance charging current and/or spark discharge current during normal operation. Spark plug insulation resistance drop detection device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9036380A JPS5716368A (en) | 1980-07-02 | 1980-07-02 | Ignition plug insulation resistance reduction detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9036380A JPS5716368A (en) | 1980-07-02 | 1980-07-02 | Ignition plug insulation resistance reduction detector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5716368A JPS5716368A (en) | 1982-01-27 |
| JPS6341429B2 true JPS6341429B2 (en) | 1988-08-17 |
Family
ID=13996448
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9036380A Granted JPS5716368A (en) | 1980-07-02 | 1980-07-02 | Ignition plug insulation resistance reduction detector |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5716368A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0276645A (en) * | 1988-09-13 | 1990-03-16 | Honda Motor Co Ltd | Bolt tightening device |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102981053B (en) * | 2012-11-20 | 2015-03-04 | 天津锐意泰克汽车电子有限公司 | Secondary resistance detection circuit of ignition coil |
| CN110376440B (en) * | 2019-08-15 | 2021-08-03 | 潍柴火炬科技股份有限公司 | A special high-voltage source resistance tester for the resistance of spark plug porcelain components |
-
1980
- 1980-07-02 JP JP9036380A patent/JPS5716368A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0276645A (en) * | 1988-09-13 | 1990-03-16 | Honda Motor Co Ltd | Bolt tightening device |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5716368A (en) | 1982-01-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP2732971B2 (en) | Gasoline engine misfire detector | |
| JP2568828B2 (en) | Method and apparatus for monitoring operation of spark ignition device | |
| US5548220A (en) | Apparatus for detecting misfire in internal combustion engine | |
| JPH05149230A (en) | Knocking detecting device for internal combustion engine | |
| US4341195A (en) | Ignition system for spark plugs capable of removing carbon deposits | |
| JPS5925117B2 (en) | Ignition closure circuit for internal combustion engines | |
| US20090183719A1 (en) | Internal combustion engine ignition device | |
| JPS6328238B2 (en) | ||
| US7251571B2 (en) | Methods of diagnosing open-secondary winding of an ignition coil using the ionization current signal | |
| JP2880058B2 (en) | Misfire detection device for internal combustion engine | |
| JP3146064B2 (en) | Apparatus for detecting abnormality of spark plug of internal combustion engine and apparatus for detecting misfire of internal combustion engine | |
| JPH11336651A (en) | Sensor for ignition secondary circuit of internal combustion engine, ignition / combustion detection device, and preignition detection device | |
| JPS6341429B2 (en) | ||
| US4758790A (en) | Engine analysers for capacitor discharge ignition systems | |
| US6357428B1 (en) | Process and apparatus for determining the breakdown voltage during the ignition of an internal-combustion engine | |
| US5053745A (en) | Apparatus for warning of engine oil abnormality | |
| US3686569A (en) | Capacitive pick-up means for an electrical tachometer | |
| JP2665794B2 (en) | Ignition device for internal combustion engine | |
| US6278278B1 (en) | Measuring and diagnostic device for an ignition system of an internal combustion engine | |
| US11686282B2 (en) | Electronic device to control an ignition coil of an internal combustion engine and electronic ignition system thereof for detecting a preignition in the internal combustion engine | |
| KR100372436B1 (en) | A device for sensing ignition state of an igniter | |
| JPH07217520A (en) | Combustion state detector | |
| US3740642A (en) | Spark plug gap resistance meter | |
| JPS5924870Y2 (en) | Pre-ignition detection device for internal combustion engines | |
| US20220120251A1 (en) | Electronic device to control an ignition coil of an internal combustion engine and electronic ignition system thereof for detecting a misfire in the internal combustion engine |