JPH074868U - Ion current detector for internal combustion engine - Google Patents

Ion current detector for internal combustion engine

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Publication number
JPH074868U
JPH074868U JP3658293U JP3658293U JPH074868U JP H074868 U JPH074868 U JP H074868U JP 3658293 U JP3658293 U JP 3658293U JP 3658293 U JP3658293 U JP 3658293U JP H074868 U JPH074868 U JP H074868U
Authority
JP
Japan
Prior art keywords
ion current
operational amplifier
resistor
ignition
internal combustion
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
Application number
JP3658293U
Other languages
Japanese (ja)
Inventor
海司 田中
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Diamond Electric Manufacturing Co Ltd
Original Assignee
Diamond Electric Manufacturing Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Diamond Electric Manufacturing Co Ltd filed Critical Diamond Electric Manufacturing Co Ltd
Priority to JP3658293U priority Critical patent/JPH074868U/en
Publication of JPH074868U publication Critical patent/JPH074868U/en
Pending legal-status Critical Current

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  • Testing Of Engines (AREA)
  • Ignition Installations For Internal Combustion Engines (AREA)

Abstract

(57)【要約】 【目的】 燃焼室内のイオン電流変動してもイオン電流
演算出力部80から出力されるイオン電圧値をオペアンプ
112の完動電圧範囲内に保つ内燃機関用イオン電流検出
装置とする。 【構成】 点火コイルの1次側に直流電源装置と、1次
電流の制御を行なう駆動素子を備え、前記点火コイルの
2次側には、2次コイルの一端、あるいは両端に点火プ
ラグギャップとイオン電流演算回路を備え、前記イオン
電流演算回路内に設けられるオペアンプの非反転入力部
が抵抗144を介してアースに、また前記オペアンプの反
転入力部が抵抗142を介して前記オペアンプの出力部に
接続され、前記抵抗144と142の抵抗値を可変可能とす
る。
(57) [Summary] [Purpose] Even if the ion current in the combustion chamber fluctuates, the operational amplifier calculates the ion voltage value output from the ion current calculation output unit 80.
An ion current detection device for an internal combustion engine is maintained within the complete voltage range of 112. A primary side of the ignition coil is provided with a DC power supply device and a drive element for controlling the primary current, and a secondary side of the ignition coil has an ignition plug gap at one end or both ends of the secondary coil. An ion current operation circuit is provided, and a non-inverting input section of the operational amplifier provided in the ion current operation circuit is grounded via a resistor 144, and an inverting input section of the operational amplifier is connected to an output section of the operational amplifier via a resistor 142. It is connected and the resistance values of the resistors 144 and 142 can be changed.

Description

【考案の詳細な説明】[Detailed description of the device]

【0001】[0001]

【産業上の利用分野】[Industrial applications]

この考案は内燃機関用点火装置、特にイオン電流の検出を行う点火装置に関す る。 The present invention relates to an internal combustion engine ignition device, and more particularly to an ignition device for detecting an ion current.

【0002】[0002]

【従来の技術】[Prior art]

内燃機関用点火装置では、点火コイルによって行われる点火状態を燃焼室内の イオン電流により検出でき、この情報によって内燃機関の希薄燃焼等の制御を実 現している。(例えば、特開平4−137269) In an internal combustion engine ignition device, the ignition state performed by an ignition coil can be detected by the ion current in the combustion chamber, and control of lean combustion of the internal combustion engine is realized by this information. (For example, Japanese Patent Laid-Open No. 4-137269)

【0003】[0003]

【考案が解決しようとする課題】[Problems to be solved by the device]

上記構成の内燃機関用点火装置においては、燃焼室内の空燃比を希薄燃焼状態 にした時、例えば空燃比を19%から20%に変化した場合、点火プラグギャップの点 火による燃焼室内の燃焼状態が不安定になるとともに燃焼インピーダンスが高く なるため、燃焼室内に発生するイオン電流値が通常空燃比時に比べ小さくなり、 イオン電流の出力結果を基に点火装置の制御をマイクロコンピュータ(以下「マ イコン」)で行おうとすると、このマイコンの処理内容(プログラム)が非常に 複雑になる。 In the internal combustion engine ignition device configured as described above, when the air-fuel ratio in the combustion chamber is set to the lean combustion state, for example, when the air-fuel ratio is changed from 19% to 20%, the combustion state in the combustion chamber due to ignition of the ignition plug gap. Becomes unstable and the combustion impedance becomes higher, the ion current value generated in the combustion chamber becomes smaller than that at the normal air-fuel ratio, and the ignition device control is performed based on the output result of the ion current by a microcomputer (hereinafter referred to as “computer”). )), The processing contents (program) of this microcomputer becomes very complicated.

【0004】[0004]

【課題を解決するための手段】[Means for Solving the Problems]

上記課題を解決するために本考案では、点火コイルの1次側に直流電源装置と 、1次電流の制御を行なう駆動素子、前記駆動素子に点火信号を入力する点火信 号入力部を備え、前記点火コイルの2次側には、2次コイルの一端、あるいは両 端に点火プラグギャップを備え、前記2次コイルの他端に、あるいは両端に点火 プラグギャップの接続されるものにあってはそのコイルの中点に、電流制限用素 子を介して接続されるイオン電流演算回路を備え、前記イオン電流演算回路に接 続される基準電圧入力部、前記イオン電流演算回路における演算結果を出力する イオン電流演算出力部、前記1次コイルと前記駆動素子との接続点が直接に、ま た1次フライバック電圧比較回路を介して前記イオン電流演算回路に接続され、 前記イオン電流演算回路内に設けられるオペアンプの非反転入力部が抵抗144を 介してアースに、また前記オペアンプの反転入力部が抵抗142を介して前記オペ アンプの出力部に接続されている内燃機関用点火装置において、前記抵抗144と1 42の抵抗値が可変可能である内燃機関用イオン電流検出装置とし、前記抵抗144 に並列に接続される、直列接続のスイッチング素子155と抵抗146を備え、また抵 抗142に並列に接続される、直列接続のスイッチング素子150と抵抗140を備える ことにより前記抵抗144と142の抵抗値を可変可能とした内燃機関用イオン電流検 出装置とする。 In order to solve the above problems, the present invention comprises a DC power supply device on the primary side of an ignition coil, a drive element for controlling a primary current, and an ignition signal input section for inputting an ignition signal to the drive element. The secondary side of the ignition coil is provided with an ignition plug gap at one end or both ends of the secondary coil, and the ignition plug gap is connected to the other end or both ends of the secondary coil. An ion current calculation circuit connected via a current limiting element is provided at the midpoint of the coil, and a reference voltage input section connected to the ion current calculation circuit and the calculation result in the ion current calculation circuit are output. An ion current calculation output unit, a connection point between the primary coil and the drive element is directly connected to the ion current calculation circuit via a primary flyback voltage comparison circuit, Ignition device for internal combustion engine in which the non-inverting input part of the operational amplifier provided in the arithmetic circuit is connected to the ground via the resistor 144, and the inverting input part of the operational amplifier is connected to the output part of the operational amplifier via the resistor 142. In the ion current detection device for an internal combustion engine, in which the resistance values of the resistors 144 and 142 are variable, a switching element 155 and a resistor 146, which are connected in parallel with the resistor 144 and are connected in series, are provided. An ion current detecting device for an internal combustion engine is provided in which the resistance values of the resistors 144 and 142 are variable by including a series-connected switching element 150 and a resistor 140 connected in parallel to 142.

【0005】[0005]

【作用】[Action]

上記構成の如く抵抗144と抵抗142の抵抗値を可変化すれば、例えば燃焼室内の 燃料が薄い等の理由により燃焼室内のイオン電流が微量となる場合、逆に燃焼室 内の燃料が濃い等の理由により燃焼室内のイオン電流が増加する場合では、イオ ン電流演算出力部80から出力されるイオン電圧値(オペアンプ112により電流− 電圧変換される)をオペアンプ112の完動(オペアンプ112の正常な動作が保証さ れている)電圧範囲内にすることができる。 If the resistance values of the resistors 144 and 142 are made variable as in the above-mentioned configuration, for example, when the ion current in the combustion chamber becomes very small because the fuel inside the combustion chamber is thin, on the contrary, the fuel inside the combustion chamber becomes rich, etc. If the ion current in the combustion chamber increases due to the above reason, the ion voltage value (current-voltage conversion by the operational amplifier 112) output from the ion current calculation output unit 80 should be completed (normal operation of the operational amplifier 112). Proper operation is guaranteed).

【0006】 具体的には、燃焼室内の燃料が薄い等の理由により燃焼室内のイオン電流が微 量となる場合では、スイッチング素子150と155を開放状態とし抵抗142、144のみ の抵抗値になるようにし、逆に燃焼室内の燃料が濃い等の理由により燃焼室内の イオン電流が増加する場合では、スイッチング素子150と155を閉鎖状態とし抵抗 142の両端部には抵抗142と140との合成抵抗値が、抵抗144の両端部には抵抗144 と146との合成抵抗値が得られるようにする。Specifically, when the ion current in the combustion chamber is very small because the fuel in the combustion chamber is thin or the like, the switching elements 150 and 155 are opened and the resistance values of only the resistors 142 and 144 are set. On the contrary, when the ion current in the combustion chamber increases because the fuel in the combustion chamber is rich, etc., the switching elements 150 and 155 are closed and the combined resistance of the resistors 142 and 140 is placed at both ends of the resistor 142. The value is such that a combined resistance value of the resistors 144 and 146 is obtained at both ends of the resistor 144.

【0007】 ここでスイッチング素子150と155の開閉動作はそれぞれ空燃批判別信号入力部 152と157に設定されている電圧値により決定され、前記設定値は燃焼室内がオペ アンプ112の完動電圧範囲を超える空燃比となるとき、前記スイッチング素子150 と155が閉鎖状態となり、逆に燃焼室内の空燃比が限りなくゼロに近くなるとき は開放状態となり、前記いずれの状態においてもオペアンプ112からは安定した 出力が得られる。Here, the opening / closing operation of the switching elements 150 and 155 is determined by the voltage values set in the air-fuel criticality determination signal input sections 152 and 157, respectively, and the set values are the complete voltage of the operational amplifier 112 in the combustion chamber. When the air-fuel ratio exceeds the range, the switching elements 150 and 155 are closed, and conversely, when the air-fuel ratio in the combustion chamber is extremely close to zero, the switching element 150 and 155 are open. Stable output can be obtained.

【0008】[0008]

【実施例】【Example】

本考案の実施例を図1に示す。図1において、1次コイル12と2次コイル34で 構成される点火トランスがあり、前記点火トランスの1次側は、電源装置2が1 次コイル12の1端に接続され、トランジスタ等で構成される駆動素子4のコレク タが1次コイル12の他端へ接続され、前記トランジスタのエミッタがアースへ、 ベースが点火信号入力部6へ接続され、前記点火トランスの2次側は、2次コイ ル34の両端に点火プラグギャップ(以下「ギャップ」と呼ぶ)20と22が接続され 、これらがそれぞれアースへ接続され、以上によりプラグギャップ点火制御装置 1が構成されている。 An embodiment of the present invention is shown in FIG. In FIG. 1, there is an ignition transformer composed of a primary coil 12 and a secondary coil 34. The primary side of the ignition transformer has a power supply device 2 connected to one end of the primary coil 12 and is composed of a transistor or the like. The collector of the drive element 4 is connected to the other end of the primary coil 12, the emitter of the transistor is connected to ground, the base is connected to the ignition signal input section 6, and the secondary side of the ignition transformer is the secondary. Spark plug gaps (hereinafter referred to as “gaps”) 20 and 22 are connected to both ends of the coil 34, and these are connected to the ground, respectively, and thus the plug gap ignition control device 1 is constituted.

【0009】 前記2次コイル34の中点36に電流制限用ダイオード38のカソードが接続され、 このアノードは抵抗39を介してイオン電流演算回路100へ接続されている。The cathode of the current limiting diode 38 is connected to the midpoint 36 of the secondary coil 34, and the anode is connected to the ion current calculation circuit 100 via the resistor 39.

【0010】 上記では、ギャップが2つある場合を述べたが、図2に示すようにこれらギャ ップを1つにすることもできる。図2において、2次コイル34のギャップ22に接 続されてない側の端に電流制限用ダイオード38のカソードを接続し、このアノー ドが抵抗39を介し後述のイオン電流演算回路100に接続されており、電流漏洩防 止ダイオード39のカソードは2次コイルの一方に、このアノードが前記1次コイ ル12の一方にそれぞれ接続されている。また前記ではダイオード38と抵抗39を電 流制限用で使用しているが、このダイオード38は抵抗39は、両者の内少なくとも 一方だけでも電流制限用として作用する。Although the case where there are two gaps has been described above, these gaps may be one as shown in FIG. In FIG. 2, the cathode of the current limiting diode 38 is connected to the end of the secondary coil 34 which is not connected to the gap 22, and this anode is connected to the ion current calculation circuit 100 described later via the resistor 39. The cathode of the current leakage prevention diode 39 is connected to one of the secondary coils, and this anode is connected to one of the primary coils 12. Further, in the above description, the diode 38 and the resistor 39 are used for current limiting, but this diode 38 acts as a current limiting for at least one of the resistors 39.

【0011】 前記電源装置2は電源電圧安定回路40を通って前記イオン電流演算回路100に、 このイオン電流演算回路100はイオン電流演算出力部80に、プラグギャップ点火 制御装置1内の駆動素子4のコレクタは1次フライバック電圧比較回路200を通っ て前記イオン電流演算回路100に、また駆動素子4のコレクタは直接にイオン電流 演算回路100にそれぞれ接続されている。The power supply device 2 passes through the power supply voltage stabilizing circuit 40 to the ion current calculation circuit 100, the ion current calculation circuit 100 outputs to the ion current calculation output unit 80, and the drive element 4 in the plug gap ignition control device 1 Is connected to the ion current calculation circuit 100 through the primary flyback voltage comparison circuit 200, and the collector of the driving element 4 is directly connected to the ion current calculation circuit 100.

【0012】 前記イオン電流演算回路100は、トランジスタ102のベースが1次フライバック 電圧比較回路200に、コレクタが抵抗106を介して前記電源電圧安定回路40に、エ ミッタがアースにつながっている。前記エミッタとアースの間にはオペアンプ11 2の反転入力部(−)が接続されている。このオペアンプ112の非反転入力部(+ )は抵抗144を通ってアースと、また抵抗146を通ってスイッチング素子(例えば 電界効果トランジスタ、以下「FET」)155のソースに接続され、このドレイ ンがアースに、ゲートが空燃批判別信号入力部157に接続されている。前記オペ アンプ112の反転入力部は抵抗142を介してオペアンプ112の出力部と、またFE T150のドレインに接続されており、このソースは抵抗140を介してオペアンプ11 2の出力部に、FET150のゲートは空燃批判別信号入力部152にそれぞれ接続さ れている。In the ion current calculation circuit 100, the base of the transistor 102 is connected to the primary flyback voltage comparison circuit 200, the collector is connected to the power supply voltage stabilization circuit 40 via the resistor 106, and the emitter is connected to the ground. The inverting input portion (-) of the operational amplifier 112 is connected between the emitter and the ground. The non-inverting input (+) of the operational amplifier 112 is connected to the ground through a resistor 144 and to the source of a switching element (for example, a field effect transistor, hereafter “FET”) 155 through a resistor 146. The gate is connected to the ground to the air-fuel criticality discrimination signal input unit 157. The inverting input section of the operational amplifier 112 is connected to the output section of the operational amplifier 112 through the resistor 142 and the drain of the FET 150, and the source is connected to the output section of the operational amplifier 112 through the resistor 140 and the FET 150. The gates are connected to the air-fuel criticality discrimination signal input section 152, respectively.

【0013】 前記抵抗39とアースとの間に直列接続のコンデンサ124とダイオード126、ツェ ナーダイオード128が設けられ、ダイオード126のカソードはツェナーダイオード 128のカソードへ、ダイオード126のアノードはコンデンサ124へ、ツェナーダイ オード128のアノードはアースへそれぞれ接続される。A capacitor 124, a diode 126, and a Zener diode 128 connected in series are provided between the resistor 39 and the ground, the cathode of the diode 126 is the cathode of the Zener diode 128, the anode of the diode 126 is the capacitor 124, The anodes of Zener diode 128 are each connected to ground.

【0014】 駆動素子4のコレクタは、抵抗131を介してダイオード130のアノードに接続さ れ、このカソードが前記抵抗39とコンデンサ124の接続点を介して、直列接続の 抵抗116とツェナーダイオード118、抵抗120、ダイオード122を通ってアースに接 続されている。ここでツェナーダイオード118のカソードは抵抗116に、このアノ ードは抵抗120に、ダイオード122のカソードは抵抗120に、このアノードはアー スにそれぞれ接続される。The collector of the driving element 4 is connected to the anode of the diode 130 via the resistor 131, and the cathode is connected in series via the resistor 39 and the capacitor 124 to the resistor 116 and the Zener diode 118, It is connected to ground through a resistor 120 and a diode 122. Here, the cathode of the Zener diode 118 is connected to the resistor 116, the anode thereof is connected to the resistor 120, the cathode of the diode 122 is connected to the resistor 120, and the anode thereof is connected to the earth.

【0015】 前記コンデンサ124とダイオード126の接続点は前記ツェナーダイオード118と 抵抗120の接続点に接続され、前記それぞれの接続点はトランジスタ102のエミッ タに接続されている。The connection point between the capacitor 124 and the diode 126 is connected to the connection point between the zener diode 118 and the resistor 120, and each connection point is connected to the emitter of the transistor 102.

【0016】 前記1次フライバック電圧比較回路200は、電源電圧安定回路40とアースの間 に直列接続の抵抗210と212が設けられる。前記抵抗210と212との接続点は、抵抗 214を介してオペアンプ216の非反転入力部と、抵抗220を介して前記オペアンプ2 16の出力部にそれぞれ接続されている。前記オペアンプ216の出力部は、抵抗218 を通ってイオン電流演算回路100内のトランジスタ102のベースに接続される。前 記1次コイル12と駆動素子4との接続点が、直列接続の抵抗202と208を通って前 記オペアンプ216の非反転入力部に接続され、前記抵抗202と208の接続点が、並 列接続の抵抗204とコンデンサ206を通ってアースに接続されている。The primary flyback voltage comparison circuit 200 includes resistors 210 and 212 connected in series between the power supply voltage stabilizing circuit 40 and the ground. The connection points of the resistors 210 and 212 are connected to the non-inverting input section of the operational amplifier 216 via the resistor 214 and the output section of the operational amplifier 216 via the resistor 220, respectively. The output part of the operational amplifier 216 is connected to the base of the transistor 102 in the ion current calculation circuit 100 through the resistor 218. The connection point between the primary coil 12 and the drive element 4 is connected to the non-inverting input section of the operational amplifier 216 through the series-connected resistors 202 and 208, and the connection point between the resistors 202 and 208 is parallel. It is connected to ground through a resistor 204 and a capacitor 206 in a column connection.

【0017】 なお本実施例ではスイッチング素子にFETを使用したが、これはゲート信号 により開閉する素子(例えばトランジスタ、サイリスタ)若しくはダイオード等 の素子に置換えても同様の効果が得られる。また前記では抵抗142と144を可変化 するためにこれと並列接続でそれぞれ抵抗140と146を配置しているが、他の接続 手段により抵抗142と144の両端の抵抗値を変化させてもよい。Although the FET is used as the switching element in the present embodiment, the same effect can be obtained by replacing it with an element that opens and closes by a gate signal (for example, a transistor or thyristor) or an element such as a diode. Also, in the above, the resistors 140 and 146 are arranged in parallel with the resistors 142 and 144 in order to make them variable, but the resistance values at both ends of the resistors 142 and 144 may be changed by other connecting means. .

【0018】[0018]

【考案の効果】[Effect of device]

上記構成の如く、燃焼室内の空燃比が任意に設定した空燃比になった時に自動 的にスイッチング素子のゲートに開、または閉信号を送信するため、空燃比に関 係なく安定したイオン電流の検出結果が得られる。 As in the above configuration, when the air-fuel ratio in the combustion chamber reaches an arbitrarily set air-fuel ratio, an open or close signal is automatically sent to the gate of the switching element, so a stable ion current is generated regardless of the air-fuel ratio. The detection result is obtained.

【0019】 また構成上の追加素子も少なくて済むため、狭いエンジンルームであっても容 易に取付けスペースを確保することができ、従来マイコンで行っているイオン電 流検出プログラムと比較しても簡単なプログラムで済む。Further, since the number of additional elements in the configuration is small, it is possible to easily secure a mounting space even in a small engine room, and even compared with an ion current detection program executed by a conventional microcomputer. A simple program is enough.

【図面の簡単な説明】[Brief description of drawings]

【図1】 本考案の実施例とする内燃機関用点火装置で
ある
FIG. 1 is an ignition device for an internal combustion engine according to an embodiment of the present invention.

【図2】 点火プラグギャップが1つの場合の点火トラ
ンス付近の結線を示す図である
FIG. 2 is a diagram showing a connection in the vicinity of an ignition transformer when there is one ignition plug gap.

【符号の説明】[Explanation of symbols]

図において同一符号は同一、または相当部分を示す。 1 プラグギャップ点火制御装置 2 電源装置 4 駆動素子 6 点火信号入力部 20、22 点火プラグギャップ 36 2次コイル中点 38 電流制限用ダイオード 40 電源電圧安定回路 80 イオン電流演算出力部 100 イオン電流演算回路 112 オペアンプ 140、142、144、146 抵抗 150、155 スイッチング素子 152、157 空燃批判別信号入力部 200 1次フライバック電圧比較回路 In the drawings, the same reference numerals indicate the same or corresponding parts. 1 Plug Gap Ignition Control Device 2 Power Supply Device 4 Drive Element 6 Ignition Signal Input Unit 20, 22 Ignition Plug Gap 36 Secondary Coil Midpoint 38 Current Limiting Diode 40 Power Supply Voltage Stabilization Circuit 80 Ion Current Calculation Output Unit 100 Ion Current Calculation Circuit 112 operational amplifier 140, 142, 144, 146 resistance 150, 155 switching element 152, 157 air-fuel criticality discrimination signal input unit 200 primary flyback voltage comparison circuit

Claims (2)

【実用新案登録請求の範囲】[Scope of utility model registration request] 【請求項1】 点火コイルの1次側に直流電源装置と、
1次電流の制御を行なう駆動素子を備え、前記点火コイ
ルの2次側には、2次コイルの一端、あるいは両端に点
火プラグギャップとイオン電流演算回路を備え、前記イ
オン電流演算回路内に設けられるオペアンプの非反転入
力部が抵抗144を介してアースに、また前記オペアンプ
の反転入力部が抵抗142を介して前記オペアンプの出力
部に接続されている内燃機関用点火装置において、前記
抵抗144と142の抵抗値が可変可能である内燃機関用イオ
ン電流検出装置。
1. A DC power supply device on the primary side of the ignition coil,
A drive element for controlling the primary current is provided, and an ignition plug gap and an ion current calculation circuit are provided at one or both ends of the secondary coil on the secondary side of the ignition coil, and provided in the ion current calculation circuit. In the ignition device for an internal combustion engine, the non-inverting input part of the operational amplifier is connected to the ground via the resistor 144, and the inverting input part of the operational amplifier is connected to the output part of the operational amplifier via the resistor 142. An ion current detection device for an internal combustion engine in which the resistance value of 142 is variable.
【請求項2】 請求項1記載の抵抗144に並列に接続さ
れる、直列接続のスイッチング素子155と抵抗146を備
え、また抵抗142に並列に接続される、直列接続のスイ
ッチング素子150と抵抗140を備える内燃機関用イオン電
流検出装置。
2. A series-connected switching element 150 and a resistance 140, which are connected in parallel with the resistance 144 according to claim 1, and which are connected in series, and which are connected in series with a switching element 155 and a resistance 146. An ion current detection device for an internal combustion engine, comprising:
JP3658293U 1993-06-10 1993-06-10 Ion current detector for internal combustion engine Pending JPH074868U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3658293U JPH074868U (en) 1993-06-10 1993-06-10 Ion current detector for internal combustion engine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3658293U JPH074868U (en) 1993-06-10 1993-06-10 Ion current detector for internal combustion engine

Publications (1)

Publication Number Publication Date
JPH074868U true JPH074868U (en) 1995-01-24

Family

ID=12473772

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3658293U Pending JPH074868U (en) 1993-06-10 1993-06-10 Ion current detector for internal combustion engine

Country Status (1)

Country Link
JP (1) JPH074868U (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006220140A (en) * 2005-01-14 2006-08-24 Denso Corp Ion current detection circuit in ignition device for internal combustion engine
JP2006283568A (en) * 2005-03-31 2006-10-19 Diamond Electric Mfg Co Ltd Ignition coil for internal combustion engine

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006220140A (en) * 2005-01-14 2006-08-24 Denso Corp Ion current detection circuit in ignition device for internal combustion engine
JP4544113B2 (en) * 2005-01-14 2010-09-15 株式会社デンソー Ion current detection circuit in an ignition device for an internal combustion engine
JP2006283568A (en) * 2005-03-31 2006-10-19 Diamond Electric Mfg Co Ltd Ignition coil for internal combustion engine
JP4598582B2 (en) * 2005-03-31 2010-12-15 ダイヤモンド電機株式会社 Ignition coil for internal combustion engine

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