JPH10141196A - Ignition device having cylinder discriminating means - Google Patents
Ignition device having cylinder discriminating meansInfo
- Publication number
- JPH10141196A JPH10141196A JP31275596A JP31275596A JPH10141196A JP H10141196 A JPH10141196 A JP H10141196A JP 31275596 A JP31275596 A JP 31275596A JP 31275596 A JP31275596 A JP 31275596A JP H10141196 A JPH10141196 A JP H10141196A
- Authority
- JP
- Japan
- Prior art keywords
- ignition
- ignition coil
- hold circuit
- electromotive force
- cylinder
- 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
Links
Landscapes
- 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】本発明は自動車用の内燃機関に使
用される点火装置に関し、特に多気筒内燃機関の点火タ
イミング判断に使用される気筒判別手段を備える点火装
置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ignition device used for an internal combustion engine for a vehicle, and more particularly to an ignition device provided with a cylinder discriminating means used for judging ignition timing of a multi-cylinder internal combustion engine.
【0002】[0002]
【従来の技術】従来の内燃機関点火装置は、昇圧トラン
スから構成される点火コイルの1次側に1次電流を遮断
(導通制御)するパワートランジスタ等から成るイグナ
イタが接続され、前記点火コイルの2次側出力に点火プ
ラグが接続されており、点火動作は前記イグナイタに点
火信号を与えることでなされる。2. Description of the Related Art In a conventional internal combustion engine ignition device, an igniter including a power transistor or the like for interrupting (conducting control) a primary current is connected to a primary side of an ignition coil composed of a step-up transformer. An ignition plug is connected to the secondary output, and an ignition operation is performed by giving an ignition signal to the igniter.
【0003】上述したような点火装置では、各気筒の点
火位置でその気筒用のイグナイタに点火信号を与えてお
り、この点火信号は、後述の気筒判別信号により得られ
る。周知の通りこのような気筒判別信号は、所定のパタ
ーンの磁極を有して機関の出力軸に取り付けられた磁気
ドラムと、この磁気ドラムの磁気もしくは磁気抵抗を検
知して位置検出信号を出力する複数のホール素子等とか
らなる位置検出センサを用いて、内燃機関のクランク角
度を所定の角度毎に示す信号と、所定気筒の圧縮上死点
に対応する信号とを発生させ、これら両信号に基づいて
気筒判別用の信号を得るようにしたものが知られてい
る。In the above-described ignition device, an ignition signal is given to an igniter for each cylinder at an ignition position of each cylinder, and the ignition signal is obtained from a cylinder discrimination signal described later. As is well known, such a cylinder discrimination signal outputs a position detection signal by detecting a magnetic drum having a predetermined pattern of magnetic poles attached to an output shaft of an engine and the magnetic or magnetic resistance of the magnetic drum. Using a position detection sensor composed of a plurality of Hall elements and the like, a signal indicating the crank angle of the internal combustion engine at each predetermined angle and a signal corresponding to the compression top dead center of the predetermined cylinder are generated. There is known an apparatus that obtains a signal for cylinder determination based on the signal.
【0004】[0004]
【発明が解決しようとする課題】以上のように位置検出
センサを複数用いて気筒判別信号を得る従来の内燃機関
点火装置は、磁気ドラムや位置検出センサを取り付ける
機構が必要で、内燃機関の構造が複雑になり、コストが
高くなるばかりでなく、内燃機関の設計が煩雑なものと
なり、また、各センサ取り付けスペース確保のために内
燃機関本体の小型化が困難になるといった問題を有して
いる。As described above, the conventional internal combustion engine ignition device for obtaining a cylinder discrimination signal by using a plurality of position detection sensors requires a mechanism for mounting a magnetic drum and a position detection sensor. Not only becomes complicated and costly, but also the design of the internal combustion engine becomes complicated, and there is a problem that it is difficult to reduce the size of the internal combustion engine body in order to secure a space for mounting each sensor. .
【0005】本発明は上記課題に鑑み、位置検出センサ
を1つ用いるだけで、従来のように気筒判別できる内燃
機関点火装置を提供することを目的とする。SUMMARY OF THE INVENTION In view of the above-mentioned problems, an object of the present invention is to provide an internal combustion engine ignition device that can distinguish a cylinder by using only one position detection sensor as in the prior art.
【0006】[0006]
【課題を解決するための手段】点火コイルの1次側にイ
グナイタと、この2次側に点火プラグを接続した点火装
置において、当該点火コイルの一次逆起電力のピーク値
を次の点火までホールドするピークホールド回路を備え
ることを特徴とする気筒判別手段を備える点火装置。SUMMARY OF THE INVENTION In an ignition device in which an igniter is connected to a primary side of an ignition coil and an ignition plug is connected to a secondary side thereof, a peak value of a primary back electromotive force of the ignition coil is held until the next ignition. An ignition device comprising a cylinder discriminating means, comprising:
【0007】[0007]
【実施例】本発明のイオン電流検出装置を備える点火装
置の回路構成を図1に示す。図1において、昇圧トラン
スから構成される点火コイル1の1次側には1次電流を
遮断(導通制御)するパワートランジスタから成るイグ
ナイタ2と、後述のピークホールド回路4が接続され、
また、前記イグナイタ2のベースとピークホールド回路
4が接続され、前記点火コイル1の2次側出力には点火
プラグ3が接続される。なお、前記ピークホールド回路
4は、図1に示すように分圧抵抗の接続部に第1のオペ
アンプを接続し、この出力がダイオードと、並列接続の
コンデンサとトランジスタを介して第2のオペアンプに
接続されることで形成されている。FIG. 1 shows a circuit configuration of an ignition device provided with an ion current detection device according to the present invention. In FIG. 1, an igniter 2 composed of a power transistor for interrupting the primary current (conduction control) and a peak hold circuit 4 described later are connected to the primary side of an ignition coil 1 composed of a step-up transformer.
A base of the igniter 2 and a peak hold circuit 4 are connected, and a secondary output of the ignition coil 1 is connected to an ignition plug 3. As shown in FIG. 1, the peak hold circuit 4 connects a first operational amplifier to a connection of a voltage dividing resistor, and outputs the output to a second operational amplifier via a diode and a capacitor and a transistor connected in parallel. It is formed by being connected.
【0008】上記のように構成される回路の動作につい
て、図2を参照しながら説明する。図2には、図1にお
ける各点での信号波形を示している。承知の如くイグナ
イタ2のベースa部分に図2の(a)に示すパルス信号
を供給すると、このパルス波形が立ち下がる時に、前記
点火コイル1の2次側に高圧が発生し点火プラグ3にお
いて放電が生じる。このとき点火コイル1の1次側b部
分には図2の(b)のように逆起電力が得られる。この
逆起電力をピークホールド回路4でピークホールド処理
することで、出力端子c部分からは波形(c)が出力さ
れる。また、波形(f)は任意にされたしきい値となっ
ている。The operation of the circuit configured as described above will be described with reference to FIG. FIG. 2 shows signal waveforms at respective points in FIG. As is well known, when the pulse signal shown in FIG. 2A is supplied to the base a of the igniter 2, when this pulse waveform falls, a high voltage is generated on the secondary side of the ignition coil 1, and discharge occurs in the ignition plug 3. Occurs. At this time, a back electromotive force is obtained at the primary side b of the ignition coil 1 as shown in FIG. The peak holding circuit 4 performs peak holding processing on the back electromotive force, so that a waveform (c) is output from the output terminal c. The waveform (f) has an arbitrary threshold value.
【0009】前記パルス信号(a)を所定の気筒に供給
する。この供給方法は、例えば、ある工程の上死点を0
°CAとして、180°CA間隔毎、すなわち吸気と圧
縮、膨張、排気行程の各死点に前記パルス信号(a)を
供給する。このときには各死点を示す位置センサが1つ
必要となる。The pulse signal (a) is supplied to a predetermined cylinder. In this supply method, for example, the top dead center of a certain process is set to 0.
The pulse signal (a) is supplied at 180 ° CA intervals, that is, at each dead center of the intake, compression, expansion, and exhaust strokes. At this time, one position sensor indicating each dead point is required.
【0010】圧縮行程時には、気筒内の圧力が高く点火
プラグの絶縁破壊電圧が高くなるので、点火コイル1の
1次側に発生する逆起電力は図2の(d)波形の如く極
端に大きくなる。しかし、その他の工程、吸気、膨張、
排気行程においては、気筒内の圧力が常圧、もしくは、
負圧となるので、点火コイル1の1次側に発生する逆起
電力は(e)波形の如く小さくなる。これを、パルス信
号(a)をリセット信号としたピークホールド回路4で
ピークホールドし、この出力を比較すれば、所定の気筒
の圧縮上死点が検出できる。During the compression stroke, the pressure in the cylinder is high and the breakdown voltage of the spark plug is high, so the back electromotive force generated on the primary side of the ignition coil 1 is extremely large as shown in the waveform (d) of FIG. Become. But other processes, intake, expansion,
In the exhaust stroke, the pressure in the cylinder is normal pressure, or
Since the pressure becomes negative, the back electromotive force generated on the primary side of the ignition coil 1 becomes small as shown in the waveform (e). This is peak-held by the peak-hold circuit 4 using the pulse signal (a) as a reset signal, and the output is compared to detect the compression top dead center of a predetermined cylinder.
【0011】上記比較方法は、図2のしきい値波形
(f)を越えるとHとなり、逆にこの波形(f)を下回
った場合にLを出力するオペアンプ等からなる比較器で
行うことで、Hのときが所定の気筒の圧縮上死点である
と判断できる。The above-mentioned comparison method is performed by a comparator including an operational amplifier or the like which outputs H when the waveform exceeds the threshold waveform (f) in FIG. 2 and outputs L when the waveform falls below the waveform (f). , H can be determined to be the compression top dead center of the predetermined cylinder.
【0012】したがって本発明では、前記一つの位置検
出センサと、上記所定の気筒の圧縮上死点の検出手段と
によって気筒判別が行えるものである。例えば、4気筒
内燃機関で1番から3番、4番、2番気筒順に燃焼する
内燃機関の場合で所定の気筒を1番気筒とすれば、周知
のようにこの1番気筒の上死点を0℃Aとし、次の下死
点を180℃Aとするように位置検出センサを設定す
る。このとき、通常の4気筒内燃機関の場合1番気筒の
上死点は4番気筒の上死点でもある。従って、内燃機関
の始動時には0℃Aが、1番、4番気筒どちらが圧縮上
死点であるか不明であ4るが。図1、図2に説明したよ
うに1番気筒にパルス信号(a)を供給することで圧縮
上死点を検出する。圧縮上死点が180℃Aである場
合、次に燃焼する3番気筒の圧縮上死点はその180℃
A後(位置センサが360℃A)になったときである。
この時に3番気筒から順に4番、2番、1番と点火パル
スを所定のタイミングに供給すれば内燃機関は始動し、
以上により気筒判別がなされることになる。Therefore, in the present invention, cylinder discrimination can be performed by the one position detection sensor and the means for detecting the compression top dead center of the predetermined cylinder. For example, in the case of a 4-cylinder internal combustion engine that burns in the order of 1st to 3rd, 4th and 2nd cylinders, if the predetermined cylinder is the 1st cylinder, as is well known, the top dead center of the 1st cylinder Is set to 0 ° C. and the next bottom dead center is set to 180 ° A. At this time, in the case of a normal four-cylinder internal combustion engine, the top dead center of the first cylinder is also the top dead center of the fourth cylinder. Therefore, at the time of starting the internal combustion engine, it is not clear which of the first and fourth cylinders is 0 ° C. 4 which is the compression top dead center. As described with reference to FIGS. 1 and 2, the compression top dead center is detected by supplying the pulse signal (a) to the first cylinder. If the compression top dead center is 180 ° C., the compression top dead center of the third cylinder to be burned next is 180 ° C.
A (when the position sensor is 360 ° C.).
At this time, if the ignition pulse is supplied at predetermined timing from the third cylinder to the fourth, second, and first cylinders, the internal combustion engine starts,
Thus, cylinder determination is performed.
【0013】上記した出力信号波形の比較は、オペアン
プ等からなる比較器だけでなく内燃機関制御装置により
演算処理してもよい。The comparison of the output signal waveforms described above may be performed not only by a comparator comprising an operational amplifier or the like but also by an internal combustion engine controller.
【0014】[0014]
【発明の効果】以上説明したように、本発明では、従来
気筒分複数個必要であった位置検出センサが1つにでき
る。したがってセンサ取り付けスペースの簡略化と省ス
ペース化が行えると共に、内燃機関の設計時の煩雑さが
解消される。As described above, according to the present invention, one position detection sensor, which conventionally required a plurality of cylinders, can be provided. Therefore, the sensor mounting space can be simplified and space can be saved, and the complexity of designing the internal combustion engine can be eliminated.
【図1】本発明の実施例を示す内燃機関点火装置の回路
図である。FIG. 1 is a circuit diagram of an internal combustion engine ignition device showing an embodiment of the present invention.
【図2】図1の動作説明に供するための信号波形であ
る。FIG. 2 is a signal waveform for describing the operation of FIG. 1;
図において同一符号は同一、または相当部分を示す。 1 点火コイル 2 イグナイタ 3 点火プラグ 4 ピークホールド回路 In the drawings, the same reference numerals indicate the same or corresponding parts. Reference Signs List 1 ignition coil 2 igniter 3 spark plug 4 peak hold circuit
Claims (2)
の2次側に点火プラグを接続した点火装置において、当
該点火コイルの一次逆起電力のピーク値を次の点火まで
ホールドするピークホールド回路を備えることを特徴と
する気筒判別手段を備える点火装置。1. An ignition device in which an igniter is connected to a primary side of an ignition coil and an ignition plug is connected to a secondary side thereof, a peak hold circuit for holding a peak value of a primary back electromotive force of the ignition coil until next ignition. An ignition device comprising a cylinder discriminating means, comprising:
次側に点火プラグとを接続した点火装置において、当該
点火コイルの一次逆起電力のピーク値を次の点火までホ
ールドするピークホールド回路と、当該ピークホールド
回路からの出力により内燃機関の圧縮上死点を検出し気
筒判別を行うことを特徴とする気筒判別手段を備える点
火装置。2. An igniter on a primary side of an ignition coil;
In an ignition device having a spark plug connected to the next side, a peak hold circuit for holding a peak value of a primary back electromotive force of the ignition coil until the next ignition, and a compression top dead center of the internal combustion engine by an output from the peak hold circuit. An ignition device comprising a cylinder discriminating means for detecting a point and performing cylinder discrimination.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP31275596A JPH10141196A (en) | 1996-11-08 | 1996-11-08 | Ignition device having cylinder discriminating means |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP31275596A JPH10141196A (en) | 1996-11-08 | 1996-11-08 | Ignition device having cylinder discriminating means |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH10141196A true JPH10141196A (en) | 1998-05-26 |
Family
ID=18033040
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP31275596A Pending JPH10141196A (en) | 1996-11-08 | 1996-11-08 | Ignition device having cylinder discriminating means |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH10141196A (en) |
-
1996
- 1996-11-08 JP JP31275596A patent/JPH10141196A/en active Pending
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