JPH0544624A - Detection device for combustion condition of gasoline engine and flying spark miss - Google Patents
Detection device for combustion condition of gasoline engine and flying spark missInfo
- Publication number
- JPH0544624A JPH0544624A JP3196590A JP19659091A JPH0544624A JP H0544624 A JPH0544624 A JP H0544624A JP 3196590 A JP3196590 A JP 3196590A JP 19659091 A JP19659091 A JP 19659091A JP H0544624 A JPH0544624 A JP H0544624A
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- current
- ion current
- gasoline engine
- 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.)
- Granted
Links
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
- Testing Of Engines (AREA)
- Ignition Installations For Internal Combustion Engines (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】この発明は、ガソリン機関におい
て、機関が安定して運転できる、空燃比のリーン限界ま
たは排気再循環量の限界を検出するのに適した着火や燃
焼状態および飛火ミス検出装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gasoline engine, which is suitable for detecting the lean limit of the air-fuel ratio or the limit of the exhaust gas recirculation amount, which allows the engine to operate stably, and the detection of ignition and combustion conditions and misfires. Regarding the device.
【０００２】[0002]
【従来の技術】自動車エンジンなどのガソリン機関で
は、排気浄化および燃費向上のため、空燃比の希薄（リ
ーン）な領域で運転し、ＮＯX およびＣＯの生成を低減
させるとともに、排気路に設けた酸化触媒で排気中に残
存する可燃物を燃焼させる排気浄化システムが使用され
ている。しかるに、より高いレベルの排気浄化および燃
費向上の要求が高まっており、このためには、機関の各
気筒毎に着火燃焼状態を検出し、機関を空燃比のリーン
限界または排気再循環量の限界に近い運転条件で運転さ
せることが望ましい。2. Description of the Related Art In a gasoline engine such as an automobile engine, in order to purify exhaust gas and improve fuel efficiency, the engine is operated in a lean region of the air-fuel ratio to reduce the production of NO X and CO and to provide the exhaust passage. An exhaust gas purification system that burns combustible substances remaining in the exhaust gas with an oxidation catalyst is used. However, there is an increasing demand for higher levels of exhaust purification and fuel efficiency improvement.To this end, the ignition and combustion state is detected for each cylinder of the engine, and the lean limit of the air-fuel ratio or the limit of exhaust gas recirculation is set for the engine. It is desirable to operate under operating conditions close to.
【０００３】[0003]
【発明が解決しようとする課題】この発明の目的は、ガ
ソリン機関において、スパークプラグに流れるイオン電
流の電流波形が、上記限界運転状態に近づくほど、大き
くばらつくという知見に基づき、イオン電流波形を検出
して各気筒毎に安定運転の限界に近い状態でガソリン機
関を運転するための情報を得ることのできる燃焼状態検
出装置を提供することにある。SUMMARY OF THE INVENTION An object of the present invention is to detect an ion current waveform in a gasoline engine based on the finding that the current waveform of the ion current flowing through the spark plug greatly varies as it approaches the limit operating state. Another object of the present invention is to provide a combustion state detection device that can obtain information for operating a gasoline engine in a state close to the limit of stable operation for each cylinder.
【０００４】請求項２に記載の発明の目的は、上記に加
えてスパークプラグでの飛火ミスを検出でき、排気浄化
および燃費向上を確実に行えるガソリン機関の燃焼状態
および飛火ミス検出装置を提供することにある。In addition to the above, an object of the present invention is to provide a combustion state and a flying error detection device for a gasoline engine, which can detect a flying error in a spark plug and can reliably perform exhaust gas purification and fuel efficiency improvement. Especially.
【０００５】[0005]
【課題を解決するための手段】この発明の燃焼状態検出
装置は、点火コイルと、その一次回路に流す電流を断続
する一次電流断続手段と、機関に装着されるスパークプ
ラグとを有するガソリン機関の点火回路において、二次
回路にコンデンサと定電圧ダイオードを並列接続してな
るイオン電流電源を設けるとともに、二次回路に流れる
イオン電流波形の積分回路と、該積分回路の積分値の変
動度合いを判別する判別回路を取り付け、イオン電流の
積分値の変動度合いにより、機関の燃焼状態を判別す
る。The combustion state detecting device of the present invention is a gasoline engine having an ignition coil, a primary current interrupting device for interrupting a current flowing through a primary circuit of the ignition coil, and a spark plug mounted on the engine. In the ignition circuit, the secondary circuit is provided with an ion current power supply in which a capacitor and a constant voltage diode are connected in parallel, and the integration circuit of the ion current waveform flowing in the secondary circuit and the degree of fluctuation of the integrated value of the integration circuit are determined. A discriminating circuit is attached, and the combustion state of the engine is discriminated by the degree of fluctuation of the integrated value of the ion current.
【０００６】請求項２に記載の燃焼状態および飛火ミス
検出装置は、二次回路にコンデンサと定電圧ダイオード
を並列接続してなるイオン電流電源を設けるとともに、
コンデンサの充電電流検出回路と、二次回路に流れるイ
オン電流波形の積分回路と、コンデンサの充電電流のレ
ベルおよび積分値の変動の度合いを判別する判別回路を
取り付け、コンデンサの充電電流のレベルにより飛火ミ
スを検出し、イオン電流の積分値の変動度合いにより、
機関の燃焼状態を判別する。According to a second aspect of the present invention, there is provided a combustion state and flying miss detection device, which is provided with an ion current power source in which a capacitor and a constant voltage diode are connected in parallel in a secondary circuit.
A capacitor charging current detection circuit, an integration circuit for the ion current waveform flowing in the secondary circuit, and a judgment circuit for judging the level of the charging current of the capacitor and the degree of fluctuation of the integrated value are installed. A mistake is detected, and depending on the degree of fluctuation of the integrated value of the ion current,
Determine the combustion state of the engine.
【０００７】[0007]
【発明の作用および効果】この発明では、点火タイミン
グに発生させた火花放電の二次電圧を、定電圧ダイオー
ドの作用により所定電圧レベルでコンデンサに充電し、
イオン電流電源とする。この電荷は、スパークプラグで
の火花放電による着火後、シリーズギャップに並列接続
したダイオードを介してイオン電流となって放電され
る。このときのイオン電流波形は、スパークプラグの火
花放電間隙に、燃焼により生成するイオンの発生状況に
より変動し、空燃比のリーン限界または排気再循環量の
限界に近いほど、イオン電流波形のばらつきが増大す
る。従って、ガソリン機関の気筒毎にばらつきの大きさ
を測定し、測定値で上記安定運転の限界を検知して、空
燃比または再循環排気量を安定運転できる限界に近づく
よう制御することが可能となる。これにより排気浄化お
よび燃費の向上が達成できる。According to the present invention, the secondary voltage of the spark discharge generated at the ignition timing is charged in the capacitor at a predetermined voltage level by the action of the constant voltage diode,
Ion current power supply. After being ignited by spark discharge at the spark plug, this charge becomes an ionic current and is discharged through a diode connected in parallel to the series gap. The ion current waveform at this time fluctuates in the spark discharge gap of the spark plug depending on the generation state of ions generated by combustion, and as the air-fuel ratio approaches the lean limit or the exhaust gas recirculation amount limit, the ion current waveform varies. Increase. Therefore, it is possible to measure the magnitude of the variation for each cylinder of the gasoline engine, detect the above-mentioned limit of stable operation with the measured value, and control the air-fuel ratio or the recirculation exhaust amount to approach the limit for stable operation. Become. This makes it possible to purify exhaust gas and improve fuel efficiency.
【０００８】請求項２に記載の発明では、上記に加え
て、コンデンサの充電電流を検出することにより、スパ
ークプラグで発生する飛火ミスを検出でき、この飛火ミ
スによるガソリン機関の排気の汚濁化、燃費の低下およ
び運転の不安定化を防止するための情報を得ることがで
き、排気浄化、燃費向上がより確実に達成できる。In addition to the above, in the invention as set forth in claim 2, it is possible to detect a miss-fire caused by the spark plug by detecting the charging current of the capacitor, and the pollution of the exhaust gas of the gasoline engine due to the miss-fire occurs. It is possible to obtain information for preventing deterioration of fuel efficiency and instability of driving, and more reliably achieve exhaust gas purification and fuel efficiency improvement.
【０００９】[0009]
【実施例】図１は、点火コイル１、配電器（デストリビ
ュータ）２、スパークプラグ３を備えたガソリン機関の
点火装置１００を示す。点火コイル１の一次回路１１
は、車載電源Ｖと、一次電流断続手段４とに接続され、
二次回路１２は、前記配電器２を介してスパークプラグ
３に接続されている。燃焼状態検出装置は、二次回路１
２の点火コイル１とアースとの間にイオン電流電源回路
５を設け、配電器２のローターギャップ２１と並列にイ
オン電流通電用のダイオード２２を接続し、イオン電流
波形の積分回路６と、該積分回路６の積分値のばらつき
度合いを検出するマイクロコンピュータ等の判別回路７
とを接続してなる。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT FIG. 1 shows an ignition device 100 for a gasoline engine, which is equipped with an ignition coil 1, a distributor (distributor) 2, and a spark plug 3. Primary circuit 11 of ignition coil 1
Is connected to the vehicle-mounted power source V and the primary current interrupting means 4,
The secondary circuit 12 is connected to the spark plug 3 via the distributor 2. The combustion state detection device includes a secondary circuit 1
The ion current power supply circuit 5 is provided between the ignition coil 1 of 2 and the ground, the diode 22 for ion current conduction is connected in parallel with the rotor gap 21 of the distributor 2, and the integration circuit 6 of the ion current waveform and the Discrimination circuit 7 such as a microcomputer for detecting the degree of variation in the integrated value of the integration circuit 6.
Connect and.
【００１０】一次電流断続手段４は、スイッチ素子４１
およびシグナルジェネレータ４２からなり、エンジンの
クランク角およびスロットル開度を検出し、火花放電時
期がエンジンの負荷および回転速度に適応した点火進角
となるよう一次電流を断続する。The primary current interrupting means 4 comprises a switching element 41.
And a signal generator 42, which detects the crank angle and throttle opening of the engine, and interrupts the primary current so that the spark discharge timing becomes an ignition advance angle adapted to the load and rotation speed of the engine.
【００１１】イオン電流電源回路５は、二次回路１２の
点火コイル１とアースとの間に介在させたコンデンサ５
１と、該コンデンサ５１に並列接続した定電圧ダイオー
ド５２とからなる。この実施例では、イオン電流波形を
電圧波形として測定するとともに、測定可能な時定数に
調整するため、前記コンデンサ５１とアースとの間に接
続した抵抗５３およびダイオード５４の並列回路を設け
ている。コンデンサ５１は、二次回路１２に二次電圧が
発生したとき、定電圧ダイオード５２の導通電圧である
３００ボルトで電荷を充電する。The ion current power supply circuit 5 includes a capacitor 5 interposed between the ignition coil 1 of the secondary circuit 12 and the ground.
1 and a constant voltage diode 52 connected in parallel with the capacitor 51. In this embodiment, the ion current waveform is measured as a voltage waveform, and a parallel circuit of a resistor 53 and a diode 54 connected between the capacitor 51 and the ground is provided in order to adjust the time constant to a measurable time constant. When the secondary voltage is generated in the secondary circuit 12, the capacitor 51 charges the electric charge with 300 V which is the conduction voltage of the constant voltage diode 52.
【００１２】作用を図２とともに説明する。シグナルジ
ェネレータ４２で一次電流を断続させ、の如き一次電
流を一次回路１１に生じさせる。二次回路１２にはに
示す二次電圧が生じ、イオン電流電源回路５に充電され
る。この充電電荷は、火花放電終了後にスパークプラグ
３の火花放電間隙３１付近に存在する燃焼中のイオンを
介して放電され、二次回路１２には、イオン電流電源回
路５からダイオード２２を介してイオン電流が流れ、コ
ンデンサ５１と抵抗５３との中間点では、このイオン電
流が電圧波形として現れる。The operation will be described with reference to FIG. The primary current is intermittently generated by the signal generator 42, and the primary current as described above is generated in the primary circuit 11. A secondary voltage indicated by is generated in the secondary circuit 12, and the ion current power supply circuit 5 is charged. This charge is discharged through the burning ions existing in the vicinity of the spark discharge gap 31 of the spark plug 3 after the spark discharge is completed, and the secondary circuit 12 receives the ions from the ion current power supply circuit 5 through the diode 22. A current flows, and at the intermediate point between the capacitor 51 and the resistor 53, this ionic current appears as a voltage waveform.
【００１３】このイオン電流は、図２のに示す如く、
空燃比が理論空燃比である約１５：１に近いときはｈ1
の如くイオン電流の波形のばらつきが小さい。これに対
し、空燃比が着火限界である２２：１になるとｈ2 の如
くイオン電流の波形のばらつきが極めて大きくなる。積
分回路６は、上記イオン電流波形を積分し、図２のに
示す如く積分して積分値ｖ1 を出力する。判別回路７
は、たとえば積分値ｖ2 の連続した１０個の、基準値か
らのばらつき量を積算し、積算量が一定値以上のときは
安定運転の限界が近いと判別する。この判別情報に基づ
き燃料噴射装置による燃料供給量を調整し、空燃比のリ
ーン限界近くでの安定運転を実行する。This ionic current is, as shown in FIG.
When the air-fuel ratio is close to the theoretical air-fuel ratio of about 15: 1, h 1
As described above, the fluctuation of the waveform of the ion current is small. On the other hand, when the air-fuel ratio reaches the ignition limit of 22: 1, the variation of the waveform of the ion current becomes extremely large like h 2 . The integrating circuit 6 integrates the ion current waveform and integrates it as shown in FIG. 2 to output an integrated value v 1 . Discrimination circuit 7
For example, ten consecutive variations of the integrated value v 2 from the reference value are integrated, and when the integrated amount is a certain value or more, it is determined that the limit of stable operation is near. The amount of fuel supplied by the fuel injection device is adjusted based on this discrimination information, and stable operation is performed near the lean limit of the air-fuel ratio.
【００１４】図３は請求項２に記載の燃焼状態および飛
火ミス検出装置付き点火回路を示す。この実施例では、
コンデンサ５１の充電回路をなすダイオード５４とアー
スとの間に抵抗５５を挿入し、電流検出回路８で火花放
電時の二次電圧によるコンデンサ５１の充電電流を検出
する。この抵抗５５は、前記抵抗５３に１メガオーム程
度を使用するのに対し、１００オーム程度を用いる。FIG. 3 shows an ignition circuit with a combustion state and a flying miss detection device according to a second aspect of the present invention. In this example,
A resistor 55 is inserted between the diode 54 forming the charging circuit of the capacitor 51 and the ground, and the current detection circuit 8 detects the charging current of the capacitor 51 due to the secondary voltage during spark discharge. The resistor 55 uses about 100 ohms while the resistor 53 uses about 1 megohm.
【００１５】このコンデンサ５１の充電電流は、図４の
に示し、スパークプラグ３で火花放電が正常になされ
たときは電流波形ｕの如く２０〜３０ミリアンペアの高
いピーク電流が徐々に低減する波形となる。これに対
し、図５に示す如くスパークプラグ３の絶縁体３２の表
面にカーボンＣなどが付着するカーボン汚損が発生し、
このカーボンＣを介してスパークプラグの奥で火花放電
Ｓが生じた場合は次の様になる。The charging current of the capacitor 51 is shown in FIG. 4, and when the spark discharge is normally performed by the spark plug 3, a high peak current of 20 to 30 milliamperes is gradually reduced like the current waveform u. Become. On the other hand, as shown in FIG. 5, carbon contamination such as carbon C adhering to the surface of the insulator 32 of the spark plug 3 occurs,
When the spark discharge S occurs inside the spark plug through the carbon C, the following occurs.
【００１６】たとえばカーボンＣの抵抗が１０メガオー
ムとして、この抵抗を介して放電すると、放電電圧が２
０キロボルトとしても２ミリアンペアの電流しか流れな
い。よってたとえば１０ミリアンペアを判別の基準レベ
ルとして設定し、これ以上の電流が流れたときは正常に
火花放電がなされ、設定レベル以下の電流が流れたとき
は飛火ミスと判定する。For example, if the resistance of carbon C is 10 megohms and discharging through this resistance, the discharge voltage is 2
Even with 0 kilovolts, only 2 milliamperes of current will flow. Therefore, for example, 10 milliamperes is set as a reference level for determination, and when a current higher than this is set, the spark discharge is normally performed, and when a current equal to or lower than the set level flows, it is determined that a miss fire has occurred.
【００１７】また、点火コイル１の断線、一次回路１１
または二次回路１２の接続不良、車載電源Ｖの電圧低下
など点火回路の故障または機能低下で火花放電が正常に
なされない、いわゆる飛火ミスが発生したときは、二次
電圧は発生しないか、発生しても低いレベルであり、コ
ンデンサ５１の充電電流は全く流れないか、流れても電
流波形ｖに示す如く、低いなだらかな波形になる。二次
回路１２にスパークプラグ３の絶縁破壊ができないレベ
ルの二次電圧が発生した場合、スパークプラグ３の浮遊
静電容量を充電するのに流れる電流は、浮遊静電容量が
２０ピコファラッドであり、二次電圧が２０キロボルト
であったとすると４ミリアンペアである。よって上記１
０ミリアンペアの設定レベルで飛火ミスの判別が可能と
なる。Also, the disconnection of the ignition coil 1 and the primary circuit 11
Alternatively, when a spark discharge is not normally performed due to a failure or a deterioration in function of the ignition circuit such as a connection failure of the secondary circuit 12 or a voltage drop of the vehicle-mounted power source V, a so-called misfire occurs, a secondary voltage is not generated or is generated. However, it is still at a low level, and the charging current of the capacitor 51 does not flow at all, or has a low and gentle waveform as shown by the current waveform v. When a secondary voltage of a level that does not allow dielectric breakdown of the spark plug 3 is generated in the secondary circuit 12, the current flowing to charge the floating capacitance of the spark plug 3 has a floating capacitance of 20 picofarads. If the secondary voltage is 20 kilovolts, it is 4 milliamps. Therefore, the above 1
It is possible to identify a miss fire at a setting level of 0 milliamps.
【００１８】この様にして、電流検出回路８でコンデン
サ５１への充電電流のレベルを測定し、判別回路７で実
験または計算により求めた基準値と比較することによ
り、スパークプラグ３における飛火ミスが検出できる。
よってスパークプラグ３における飛火ミスを検出したう
えで、失火を検出することにより、失火の原因をより正
確に検出でき、ガソリン機関の運転制御の質の向上に資
することができる。In this way, the level of the charging current to the capacitor 51 is measured by the current detection circuit 8 and compared with the reference value obtained by the experiment or calculation by the discrimination circuit 7, so that the spark plug 3 can be prevented from misfiring. Can be detected.
Therefore, by detecting the misfire in the spark plug 3 and then detecting the misfire, the cause of the misfire can be detected more accurately, which contributes to the improvement of the operation control of the gasoline engine.
【００１９】上記実施例においては、空燃比が希薄の限
界でガソリン機関を運転する場合について述べたが、排
気再循環量の限界も上記と同様にして検出でき、また冷
間始動時における空燃比制御においても、安定運転の限
界に近づけて空燃比制御することが可能である。In the above embodiment, the case where the gasoline engine is operated at the lean air-fuel ratio has been described, but the limit of the exhaust gas recirculation amount can be detected in the same manner as described above, and the air-fuel ratio at the cold start can be detected. Also in control, it is possible to perform air-fuel ratio control close to the limit of stable operation.
【００２０】この発明の燃焼状態検出装置は、配電器２
を備えないディストリビュータ・レス・イグナイタ（Ｄ
ＬＩ）式の点火装置を備えたガソリン機関にも適用でき
る。このＤＬＩ式点火装置では、一次電流の通電開始
（オン）時に、点火回路の二次回路に生じる二次電圧で
スパークプラグに火花放電が発生することを防止するた
め、逆流防止用ダイオードが介装されている。この発明
の燃焼状態検出装置をＤＬＩ式点火装置に適用するに
は、上記逆流防止用ダイオードを廃止し、一次電流の立
ち上がりをなだらかにするなどして、一次電流オン時の
二次電流のレベルをスパークプラグでの火花放電が生じ
ない電圧に押さえる手段を取ることが望ましい。The combustion state detecting device according to the present invention includes a distributor 2
Distributorless igniter (D
It can also be applied to a gasoline engine equipped with an LI) type ignition device. In this DLI type ignition device, a backflow prevention diode is provided in order to prevent spark discharge from occurring in the spark plug due to the secondary voltage generated in the secondary circuit of the ignition circuit at the time of starting the energization of the primary current (ON). Has been done. In order to apply the combustion state detecting device of the present invention to a DLI ignition device, the above-mentioned backflow prevention diode is eliminated, the rising of the primary current is made gentle, and the level of the secondary current when the primary current is turned on is adjusted. It is desirable to take measures to suppress the voltage so that spark discharge does not occur at the spark plug.
【図１】この発明の燃焼状態検出装置を装着したガソリ
ン機関の点火回路図である。FIG. 1 is an ignition circuit diagram of a gasoline engine equipped with a combustion state detecting device of the present invention.
【図２】燃焼状態検出装置の作動説明のための波形図で
ある。FIG. 2 is a waveform diagram for explaining the operation of the combustion state detection device.
【図３】この発明の燃焼状態および飛火ミス検出装置付
き点火回路図である。FIG. 3 is an ignition circuit diagram with a combustion state and a flying miss detection device according to the present invention.
【図４】飛火ミス検出装置の作動説明のための波形図で
ある。FIG. 4 is a waveform diagram for explaining the operation of the flying miss detection device.
【図５】くすぶり状態を示すスパークプラグの要部断面
図である。FIG. 5 is a cross-sectional view of essential parts of the spark plug showing a smoldering state.
１ 点火コイル ２ 配電器 ３ スパークプラグ ４ 一次電流断続手段 ５ イオン電流電源回路 ６ 積分回路 ７ 判別回路 ８ 電流検出回路 １２ 二次回路 ５１ コンデンサ ５２ 定電圧ダイオード ５５ 抵抗 1 Ignition coil 2 Distributor 3 Spark plug 4 Primary current interrupting means 5 Ion current power supply circuit 6 Integration circuit 7 Discrimination circuit 8 Current detection circuit 12 Secondary circuit 51 Capacitor 52 Constant voltage diode 55 Resistance
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.5 識別記号 庁内整理番号 ＦＩ 技術表示箇所 Ｆ０２Ｐ 17/00 Ｗ 8923−3Ｇ Ｇ０１Ｍ 15/00 Ｚ 7324−2Ｇ (72)発明者 伊藤 康生 名古屋市瑞穂区高辻町14番18号 日本特殊 陶業株式会社内─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 5 Identification number Internal reference number FI Technical display location F02P 17/00 W 8923-3G G01M 15/00 Z 7324-2G (72) Inventor Yasushi Ito Nagoya City 14-18 Takatsuji-cho, Mizuho-ku, Japan Special Ceramics Co., Ltd.
Claims (2)
を断続する一次電流断続手段と、機関に装着されるスパ
ークプラグとを有するガソリン機関の点火回路におい
て、 二次回路にコンデンサと定電圧ダイオードを並列接続し
てなるイオン電流電源を設けるとともに、二次回路に流
れるイオン電流波形の積分回路と、該積分回路の積分値
の変動度合いを判別する判別回路を取り付け、イオン電
流の積分値の変動度合いにより、機関の燃焼状態を判別
するガソリン機関の燃焼状態検出装置。1. An ignition circuit of a gasoline engine having an ignition coil, a primary current interrupting means for interrupting a current flowing through the primary circuit thereof, and a spark plug mounted on the engine, wherein a capacitor and a constant voltage diode are provided in a secondary circuit. In addition to providing an ion current power supply configured by connecting in parallel with each other, an integration circuit for the ion current waveform flowing in the secondary circuit and a determination circuit for determining the degree of change of the integrated value of the integration circuit are attached to change the integrated value of the ion current. A combustion state detection device for a gasoline engine that determines the combustion state of the engine based on the degree.
を断続する一次電流断続手段と、機関に装着されるスパ
ークプラグとを有するガソリン機関の点火回路におい
て、 二次回路にコンデンサと定電圧ダイオードを並列接続し
てなるイオン電流電源を設けるとともに、コンデンサの
充電電流検出回路と、二次回路に流れるイオン電流波形
の積分回路と、コンデンサの充電電流のレベルおよび積
分値の変動の度合いを判別する判別回路を取り付け、コ
ンデンサの充電電流のレベルにより飛火ミスを検出し、
イオン電流の積分値の変動度合いにより、機関の燃焼状
態を判別するガソリン機関の燃焼状態および飛火ミス検
出装置。2. A gasoline engine ignition circuit comprising an ignition coil, a primary current interrupting device for interrupting a current flowing through the primary circuit thereof, and a spark plug mounted on the engine, wherein a capacitor and a constant voltage diode are provided in the secondary circuit. An ion current power supply composed by connecting in parallel is provided, and the charge current detection circuit for the capacitor, the integration circuit for the ion current waveform flowing in the secondary circuit, and the level of the charge current of the capacitor and the degree of fluctuation of the integrated value are determined. A discrimination circuit is attached, and a miss fire is detected by the level of the charging current of the capacitor.
A combustion state and flying miss detection device for a gasoline engine that determines the combustion state of the engine based on the degree of change in the integrated value of the ion current.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3196590A JP2572494B2 (en) | 1991-06-05 | 1991-08-06 | Gasoline engine combustion state and spark miss detection device |
| BR9203138A BR9203138A (en) | 1991-08-06 | 1992-08-06 | DETECTOR DETECTOR OF SPARK FAILURE AND COMBUSTION CONDITIONS IN INTERNAL COMBUSTION ENGINE FOR GASOLINE |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13446091 | 1991-06-05 | ||
| JP3-134460 | 1991-06-05 | ||
| JP3196590A JP2572494B2 (en) | 1991-06-05 | 1991-08-06 | Gasoline engine combustion state and spark miss detection device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0544624A true JPH0544624A (en) | 1993-02-23 |
| JP2572494B2 JP2572494B2 (en) | 1997-01-16 |
Family
ID=26468573
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3196590A Expired - Fee Related JP2572494B2 (en) | 1991-06-05 | 1991-08-06 | Gasoline engine combustion state and spark miss detection device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2572494B2 (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0899455A2 (en) * | 1997-06-05 | 1999-03-03 | General Motors Corporation | Closed-loop ignition timing control |
| US5925819A (en) * | 1995-05-10 | 1999-07-20 | Nippon Soken, Inc. | Combustion monitoring apparatus for internal combustion engine |
| US6020742A (en) * | 1996-02-09 | 2000-02-01 | Nippon Soken Inc | Combustion monitoring apparatus for internal combustion engine |
| US6054859A (en) * | 1996-06-03 | 2000-04-25 | Mitsubishi Denki Kabushiki Kaisha | Combustion state detecting apparatus for internal combustion engine |
| US6104195A (en) * | 1995-05-10 | 2000-08-15 | Denso Corporation | Apparatus for detecting a condition of burning in an internal combustion engine |
| US6505605B2 (en) | 2000-03-29 | 2003-01-14 | Ngk Spark Plug Co., Ltd. | Control system for an internal combustion engine and method carried out by the same |
| US6512375B1 (en) | 1999-09-02 | 2003-01-28 | Ngk Spark Plug.Co., Ltd. | Method of detecting spark plug fouling and ignition system having means for carrying out the same |
| JP2008261348A (en) * | 2001-07-10 | 2008-10-30 | Harley-Davidson Motor Co | Motorcycle having combustion diagnostic system |
| US20110017172A1 (en) * | 2009-07-27 | 2011-01-27 | Nippon Soken, Inc. | Controller for internal combustion engine |
-
1991
- 1991-08-06 JP JP3196590A patent/JP2572494B2/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5925819A (en) * | 1995-05-10 | 1999-07-20 | Nippon Soken, Inc. | Combustion monitoring apparatus for internal combustion engine |
| US6104195A (en) * | 1995-05-10 | 2000-08-15 | Denso Corporation | Apparatus for detecting a condition of burning in an internal combustion engine |
| US6020742A (en) * | 1996-02-09 | 2000-02-01 | Nippon Soken Inc | Combustion monitoring apparatus for internal combustion engine |
| US6054859A (en) * | 1996-06-03 | 2000-04-25 | Mitsubishi Denki Kabushiki Kaisha | Combustion state detecting apparatus for internal combustion engine |
| EP0899455A2 (en) * | 1997-06-05 | 1999-03-03 | General Motors Corporation | Closed-loop ignition timing control |
| EP0899455A3 (en) * | 1997-06-05 | 2001-04-04 | Delphi Technologies, Inc. | Closed-loop ignition timing control |
| US6512375B1 (en) | 1999-09-02 | 2003-01-28 | Ngk Spark Plug.Co., Ltd. | Method of detecting spark plug fouling and ignition system having means for carrying out the same |
| US6505605B2 (en) | 2000-03-29 | 2003-01-14 | Ngk Spark Plug Co., Ltd. | Control system for an internal combustion engine and method carried out by the same |
| JP2008261348A (en) * | 2001-07-10 | 2008-10-30 | Harley-Davidson Motor Co | Motorcycle having combustion diagnostic system |
| US20110017172A1 (en) * | 2009-07-27 | 2011-01-27 | Nippon Soken, Inc. | Controller for internal combustion engine |
| US8478508B2 (en) * | 2009-07-27 | 2013-07-02 | Nippon Soken, Inc. | Controller for internal combustion engine |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2572494B2 (en) | 1997-01-16 |
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| LAPS | Cancellation because of no payment of annual fees |