JP2572494B2 - Gasoline engine combustion state and spark miss detection device - Google Patents
Gasoline engine combustion state and spark miss detection deviceInfo
- Publication number
- JP2572494B2 JP2572494B2 JP3196590A JP19659091A JP2572494B2 JP 2572494 B2 JP2572494 B2 JP 2572494B2 JP 3196590 A JP3196590 A JP 3196590A JP 19659091 A JP19659091 A JP 19659091A JP 2572494 B2 JP2572494 B2 JP 2572494B2
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- current
- combustion state
- capacitor
- gasoline 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.)
- Expired - Fee Related
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)
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 can stably operate the engine, detects an ignition or combustion state suitable for detecting a lean limit of an air-fuel ratio or a limit of an amount of exhaust gas recirculation, and a missed ignition. Related to 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 A gasoline engine such as an automobile engine is operated in a lean air-fuel ratio region in order to purify exhaust gas and improve fuel efficiency, to reduce the generation of NO X and CO, and to be provided in an exhaust passage. 2. Description of the Related Art An exhaust gas purification system that burns combustibles remaining in exhaust gas with an oxidation catalyst is used. However, there is an increasing demand for higher levels of exhaust purification and improved fuel efficiency. For this purpose, the ignition and combustion state of each cylinder of the engine is detected, and the engine is controlled to the lean limit of the air-fuel ratio or the limit of the amount of exhaust gas recirculation. 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 It is an object of the present invention to detect an ion current waveform based on the finding that in a gasoline engine, the current waveform of an ion current flowing through a spark plug varies greatly as approaching the limit operating state. Another object of the present invention is to provide a combustion state detection device capable of obtaining 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。Another object of the present invention is to provide a device for detecting a combustion state and a misfire of a gasoline engine which can detect a misfire of a spark plug and reliably purify exhaust gas and improve fuel efficiency. It is in.
【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。According to the present invention, there is provided a combustion state detecting apparatus for a gasoline engine having an ignition coil, primary current interrupting means for interrupting an electric current flowing through a primary circuit thereof, and a spark plug mounted on the engine. In the ignition circuit, an ion current power supply having a capacitor and a constant voltage diode connected in parallel to the secondary circuit is provided, and an integration circuit of an ion current waveform flowing through the secondary circuit and a degree of variation of an integration value of the integration circuit are determined. A determination circuit for determining the combustion state of the engine is determined based on the degree of change in the integral 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 an apparatus for detecting a combustion state and a missed fire, wherein an ion current power supply having a capacitor and a constant voltage diode connected in parallel to a secondary circuit is provided.
A capacitor charging current detection circuit, an integration circuit for the ion current waveform flowing through the secondary circuit, and a determination circuit for determining the level of the charging current of the capacitor and the degree of variation of the integrated value are attached. Detects mistakes and determines the degree of change in the integrated value of 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 to the capacitor at a predetermined voltage level by the action of the constant voltage diode.
An ion current power supply is used. After being ignited by spark discharge at the spark plug, this charge is discharged as an ionic current via 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 state of generation of ions generated by combustion.The closer to the lean limit of the air-fuel ratio or the limit of the amount of exhaust gas recirculation, the more uneven the ion current waveform becomes Increase. Therefore, it is possible to measure the magnitude of the variation for each cylinder of the gasoline engine, detect the limit of the stable operation from the measured value, and control the air-fuel ratio or the recirculated exhaust gas to approach the limit at which the stable operation can be performed. Become. As a result, exhaust gas purification and improvement in fuel efficiency can be achieved.
【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。According to the second aspect of the present invention, in addition to the above, by detecting the charging current of the capacitor, it is possible to detect a missed spark generated in the spark plug. Information for preventing a decrease in fuel efficiency and instability of driving can be obtained, and exhaust gas purification and improvement in fuel efficiency can be more reliably achieved.
【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。FIG. 1 shows an ignition device 100 for a gasoline engine having an ignition coil 1, a distributor (distributor) 2, and a spark plug 3. FIG. Primary circuit 11 of ignition coil 1
Is connected to the vehicle-mounted power supply V and the primary current interrupting means 4,
The secondary circuit 12 is connected to the spark plug 3 via the power distributor 2. The combustion state detecting device includes a secondary circuit 1
An ion current power supply circuit 5 is provided between the ignition coil 1 and the ground, an ion current supply diode 22 is connected in parallel with the rotor gap 21 of the power distributor 2, and an ion current waveform integration circuit 6 is provided. A discriminating circuit 7 such as a microcomputer for detecting the degree of variation of the integral value of the integrating circuit 6
And connecting.
【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 includes a switching element 41
And a signal generator 42, which detects the crank angle and the throttle opening of the engine, and interrupts the primary current so that the spark discharge timing becomes the ignition advance angle adapted to the load and the 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, a parallel circuit of a resistor 53 and a diode 54 connected between the capacitor 51 and the ground is provided in order to measure the ion current waveform as a voltage waveform and adjust the time constant to a measurable time constant. When a secondary voltage is generated in the secondary circuit 12, the capacitor 51 charges an electric charge with 300 volts which is a 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 interrupted by the signal generator 42 to generate a primary current such as shown below in the primary circuit 11. The secondary voltage shown in the secondary circuit 12 is generated, and the ion current power supply circuit 5 is charged. This charged charge is discharged through the burning ions present near the spark discharge gap 31 of the spark plug 3 after the end of the spark discharge, and is supplied to the secondary circuit 12 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 ion 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 ion 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
The variation in the waveform of the ion current is small. In contrast, the air-fuel ratio is the ignition limit 22: variations in the waveform of the made when the as ion current h 2 1 becomes extremely large. Integration circuit 6 integrates the ion current waveform, and outputs the integral value v 1 by integrating as shown in FIG. Discrimination circuit 7
Integrates, for example, 10 consecutive variations of the integrated value v 2 from the reference value, and determines that the limit of stable operation is near when the integrated amount is equal to or more than a certain value. The fuel supply amount by the fuel injection device is adjusted based on this discrimination information, and a stable operation near the lean limit of the air-fuel ratio is performed.
【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 spark miss detection device according to the second aspect. 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 by the secondary voltage at the time of spark discharge. The resistor 55 uses about 100 ohms, while the resistor 53 uses about 1 megaohm.
【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 shows a waveform in which a high peak current of 20 to 30 mA gradually decreases like a current waveform u when spark discharge is normally performed by the spark plug 3. Become. On the other hand, as shown in FIG. 5, carbon fouling in which carbon C or the like adheres to the surface of the insulator 32 of the spark plug 3 occurs,
When a spark discharge S occurs at the back of the spark plug via 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 megaohms and discharge is performed through this resistance, the discharge voltage becomes 2
Even at 0 kilovolts, only 2 milliamps of current flows. Therefore, for example, 10 mA is set as a reference level for determination. When a current exceeding this level flows, spark discharge is normally performed, and when a current below the set level flows, it is determined that a spark failure 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。Further, disconnection of the ignition coil 1 and the primary circuit 11
Alternatively, if a spark discharge is not normally performed due to a malfunction or a deterioration in the ignition circuit such as a poor connection of the secondary circuit 12 or a drop in the voltage of the vehicle-mounted power supply V, a so-called flying mistake, the secondary voltage is not generated or generated. However, the charging current of the capacitor 51 does not flow at all, or a low and gentle waveform as shown by the current waveform v. When a secondary voltage is generated in the secondary circuit 12 at a level that does not allow dielectric breakdown of the spark plug 3, the current flowing to charge the floating capacitance of the spark plug 3 is 20 picofarads. If the secondary voltage is 20 kilovolts, it is 4 mA. Therefore, the above 1
At a setting level of 0 mA, it is possible to determine a flying miss.
【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 detecting circuit 8 and compared with the reference value obtained by experiment or calculation by the discriminating circuit 7, so that a spark miss in the spark plug 3 can be prevented. 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 more accurately detected, which can contribute to the improvement of the quality 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 limit of lean air-fuel ratio has been described. However, the limit of the amount of exhaust gas recirculation can be detected in the same manner as described above. Also in the control, it is possible to control the air-fuel ratio 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。According to the combustion state detecting device of the present invention,
Distributor without igniter (D
The invention can also be applied to a gasoline engine equipped with an LI) type ignition device. In this DLI igniter, a backflow preventing diode is interposed in order to prevent spark discharge from being generated in the spark plug by a secondary voltage generated in the secondary circuit of the ignition circuit at the time of starting (turning on) the primary current. Have been. In order to apply the combustion state detecting device of the present invention to a DLI type ignition device, the level of the secondary current at the time of turning on the primary current is reduced by eliminating the backflow prevention diode and making the rise of the primary current gentle. It is desirable to take a measure to suppress the spark plug to a voltage at which spark discharge does not occur.
【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 detecting 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 spark 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 spark 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 sectional view of a main part 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 DESCRIPTION OF SYMBOLS 1 Ignition coil 2 Distributor 3 Spark plug 4 Primary current interrupting means 5 Ion current power supply circuit 6 Integrating circuit 7 Discriminating circuit 8 Current detecting circuit 12 Secondary circuit 51 Capacitor 52 Constant voltage diode 55 Resistance
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 for a gasoline engine having an ignition coil, primary current interrupting means for interrupting an electric current flowing through a primary circuit thereof, and a spark plug mounted on the engine, wherein a secondary circuit has a capacitor and a constant voltage diode. Are provided in parallel with each other, and an integrating circuit for the ion current waveform flowing through the secondary circuit and a discriminating circuit for judging the degree of change of the integrated value of the integrating circuit are attached to the ion current power supply. 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. An ignition circuit for a gasoline engine having an ignition coil, primary current interrupting means for interrupting an electric current flowing through a primary circuit thereof, and a spark plug mounted on the engine, wherein a secondary circuit has a capacitor and a constant voltage diode. Are provided in parallel with each other, and a charging current detection circuit for the capacitor, an integration circuit for the ion current waveform flowing through the secondary circuit, and the level of the charging current of the capacitor and the degree of variation in the integrated value are determined. Attach the discriminating circuit, detect the misfire by the level of the charging current of the capacitor,
An apparatus for detecting a combustion state and a spark miss of a gasoline engine that determines the combustion state of the engine based on the degree of change in the integral 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 JPH0544624A (en) | 1993-02-23 |
| JP2572494B2 true 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) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6104195A (en) * | 1995-05-10 | 2000-08-15 | Denso Corporation | Apparatus for detecting a condition of burning in an internal combustion engine |
| US5925819A (en) * | 1995-05-10 | 1999-07-20 | Nippon Soken, Inc. | Combustion monitoring apparatus for internal combustion engine |
| JPH09273470A (en) * | 1996-02-09 | 1997-10-21 | Nippon Soken Inc | Combustion condition detector |
| JPH09324735A (en) * | 1996-06-03 | 1997-12-16 | Mitsubishi Electric Corp | Combustion state detector for internal combustion engine |
| US5896842A (en) * | 1997-06-05 | 1999-04-27 | General Motors Corporation | Closed-loop ignition timing control |
| JP2001073918A (en) | 1999-09-02 | 2001-03-21 | Ngk Spark Plug Co Ltd | Carbon fouling detecting method |
| 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 |
| JP2003120410A (en) * | 2001-07-10 | 2003-04-23 | Harley-Davidson Motor Co | Motorcycle having system for combustion diagnostis |
| JP5079754B2 (en) * | 2009-07-27 | 2012-11-21 | 株式会社日本自動車部品総合研究所 | Control device for internal combustion engine |
-
1991
- 1991-08-06 JP JP3196590A patent/JP2572494B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0544624A (en) | 1993-02-23 |
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