JPS61223233A - Engine controller - Google Patents
Engine controllerInfo
- Publication number
- JPS61223233A JPS61223233A JP6072285A JP6072285A JPS61223233A JP S61223233 A JPS61223233 A JP S61223233A JP 6072285 A JP6072285 A JP 6072285A JP 6072285 A JP6072285 A JP 6072285A JP S61223233 A JPS61223233 A JP S61223233A
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- ignition
- ignition coil
- signal
- anomaly
- 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)
Abstract
Description
【発明の詳細な説明】
〔発明の利用分野〕 ・
不発明は、自動車用ガシリン工ンジンなど電気着火方式
の内燃機関の制御装置に係シ、特に、複数の点火コイル
を備え、これらの点火コイルごとに独立して一次電流制
御を行なうことくよシ各気筒どとの点火制御を行なうよ
うにしたエンジン制御装置に関する。
□
〔発明の背景〕 ′
近年、自動車用エンジンなどでは各種の自己診断機能が
設けられるようＫなっているが、従来のエンジン制御装
置での点火コイルの自己診断では、点火コイルの一次電
圧を取１込み、点火コイルの断線やショートなどの異常
を行なっている。しかして−複数個の点火しイルを用い
たエンジンでは、例えば特開昭５５−９６３６４号公報
に開示されているよ５に、自己診断については特に配慮
されていなかった＝゛
一方、このように点火コイルが複数個用らられている場
合には、これら複数の点火コイルのそれぞれから一次電
圧をそれぞれ別個に診断部分にまでもたらさなければな
らず、従って、従来のエンジン制御装置では、配線数の
増大やそれに序なうコストアップなとめ欠点がある。[Detailed Description of the Invention] [Field of Application of the Invention] The invention relates to a control device for an internal combustion engine of an electric ignition type, such as an automobile gasoline engine, and in particular, to a control device for an internal combustion engine of an electric ignition type, such as a gasoline engine for an automobile, and in particular, a control device for an internal combustion engine using a plurality of ignition coils. The present invention relates to an engine control device that performs ignition control for each cylinder without independently performing primary current control for each cylinder.
□ [Background of the Invention] ′ In recent years, various self-diagnosis functions have been installed in automobile engines, etc., but in the self-diagnosis of the ignition coil in conventional engine control devices, the primary voltage of the ignition coil is not measured. Including 1, there is an abnormality such as a disconnection or short circuit in the ignition coil. However, in engines using multiple ignition oils, no particular consideration was given to self-diagnosis, as disclosed, for example, in Japanese Patent Application Laid-Open No. 55-96364. If multiple ignition coils are used, the primary voltage from each of the multiple ignition coils must be brought separately to the diagnostic section, and therefore conventional engine control systems require a reduction in the number of wires. There are disadvantages such as increase in size and the resulting increase in cost.
本発明の目的は、上記した従来技術の欠点を除き、簡単
な構成で複数の点火フィルの異常検出が行なえ、常に確
実に自己診断を行なうことができるエンジン制御装置ｔ
ｍ供するにある。An object of the present invention is to eliminate the above-mentioned drawbacks of the prior art, and to provide an engine control device capable of detecting abnormalities of a plurality of ignition fills with a simple configuration, and capable of constantly and reliably performing self-diagnosis.
There is a lot to offer.
この目的を達成するため、不錦明は、点火コイルに対す
る通電制御用の信号を各点火コイルからオア回路を介し
て共通に取り出し、その出力のレベルにより異常判定を
行なうようＫした点を特徴とする。In order to achieve this objective, Fukinmei is characterized in that the signal for controlling the energization of the ignition coils is commonly extracted from each ignition coil via an OR circuit, and an abnormality is determined based on the output level. do.
以下、本発明によるエンジン制御装置について、図示の
実施例により詳細に説明する。DESCRIPTION OF THE PREFERRED EMBODIMENTS An engine control device according to the present invention will be explained in detail below using illustrated embodiments.
第り図は本発明を４気筒エンジンに適用した場合の一実
施例で、図において、１は制御用ＣＰＵ１
２は分周回路、３〜６は制御用トランジスタ、７は各種
のセンサ一群、８は表示回路、９−１２はダイオード、
１３．１４はコンパレータである。Figure 2 shows an example in which the present invention is applied to a four-cylinder engine.
2 is a frequency dividing circuit, 3 to 6 are control transistors, 7 is a group of various sensors, 8 is a display circuit, 9-12 is a diode,
13 and 14 are comparators.
なお、図中で、ＩＧＮＩ〜ＩＧＮ４は各点火コイル（図
示してない）の通電制御用パワートランジスタ（これも
図示してない）の各々のペース駆動用の信号で、さらＫ
Ｖｍはバッテリー電圧を、そしてＶａｃはエンジン制御
装置内で作られる５ｖの電源を示す。In the figure, IGNI to IGN4 are signals for driving the pace of the power transistors (also not shown) for controlling the energization of each ignition coil (not shown).
Vm indicates the battery voltage, and Vac indicates the 5V power supply generated within the engine control unit.
ＣＰＵＩはセンサ一群７で示し危各檀のセンサーからの
信号により点火時期、通電時間などの計算を行なう。The CPU is represented by a group of sensors 7, and calculates ignition timing, energization time, etc. based on signals from each sensor.
分周回路２はＣＰＵ１で計算された点火信号（以下、Ｉ
ＧＮ信号という）を各気筒ごとに分配する働きをする。The frequency dividing circuit 2 receives an ignition signal (hereinafter referred to as I) calculated by the CPU 1.
It functions to distribute the GN signal (GN signal) to each cylinder.
トランジスタ３〜６は各点火コイルのパワー、トランジ
スタを駆動する働きをする。Transistors 3 to 6 serve to drive the power and transistors of each ignition coil.
表示回路８は診断結果ｔ−狭示させる働きをする。The display circuit 8 functions to display the diagnostic result t-.
ダイオード９〜１２はオア回路を構成し、各点火コイル
ごとの信号ＩＧＮＩ〜ＩＧＮ４ｔ−共通に取り出す働き
をする。Diodes 9 to 12 constitute an OR circuit, and serve to commonly take out signals IGNI to IGN4t- for each ignition coil.
コンパレータ１３，１４はそれぞれ０点と０点の異なっ
た電圧を基準電圧として各点火コイルの一次回路の断線
、及びショートを検出する働きをする。The comparators 13 and 14 function to detect disconnections and short circuits in the primary circuit of each ignition coil using different voltages at the 0 point and 0 point as reference voltages, respectively.
次に、この実施例の動作を第２図によって説明する。Next, the operation of this embodiment will be explained with reference to FIG.
まず、第１図の０点には、１ｇ２図のΦ波形で示す信号
が現われている。First, at point 0 in FIG. 1, a signal shown by the Φ waveform in FIG. 1g2 appears.
そこで、各コンパレーター１３．１４の基準電圧、りｔ
シ■点の電圧と０点の電圧を、この０１１Ｌ形に対して
１８２図に示す関係・となるように定めておく。Therefore, the reference voltage of each comparator 13.14, rit
The voltage at point C and the voltage at point 0 are determined so that they have the relationship shown in Figure 182 for this 011L type.
・ そうすると、まず、点火コイルが正常なときに
は、コンパレーター１３の出力は１、Ｈ＃に保たれたｔ
ｔとなり、他方、コンパレーター１４の出力には方形波
が現われている。、
次に、成る点火コイルの一次側の回路が一線したとすれ
ば、その点火；イルに通電されたときに０点の電圧は０
点の電圧よシも大きくなるから、このときにはコンパレ
ーター１３の出力は１Ｌ１とな少、断線状態であること
が判別できる。- Then, first, when the ignition coil is normal, the output of comparator 13 is kept at 1, H#.
t, and on the other hand, a square wave appears at the output of the comparator 14. , Next, if the circuit on the primary side of the ignition coil is in line, the voltage at the 0 point when the ignition coil is energized is 0.
Since the voltage at the point also increases, the output of the comparator 13 at this time is 1L1, which indicates that the wire is disconnected.
また、成る点火コイルの一次側にシト→が発生し九とき
Ｋは、この点火コイ゛ルに通電されたときに０点の電圧
は０点の電圧よシも低くなシ、このときにはコ／パレー
タ−１４の出力は＠Ｌ″にな〕、ショート発生を検出す
ることができる。Also, when the ignition coil is energized, the voltage at the 0 point is lower than the voltage at the 0 point. The output of the parator 14 becomes @L'', and the occurrence of a short circuit can be detected.
そこで、ＣＰＵＬはこれらコンパレーター１３．１４か
らの信号ｔ−取り込み、その信号を気筒判別してやれば
各点火コイルごとの異常判定を行なうことができ、これ
に基づいて表示回路８を動作させることができる。Therefore, by taking in the signals t- from these comparators 13 and 14 and using the signals to discriminate between cylinders, it is possible to determine an abnormality for each ignition coil, and to operate the display circuit 8 based on this. .
そして、この実施例によれば、異常判定のための信号の
取ル込みを０点から１不の信号線だけで行なうことがで
き、点火コイルが複数個あっても配線数が増くなること
はない。According to this embodiment, it is possible to take in signals for abnormality determination using only the signal lines from 0 to 1, and even if there are multiple ignition coils, the number of wires increases. There isn't.
以上説明したように、本発明によれば、複数の点火コイ
ルの異常検出ｔただ１本の１１号線によって行なうこと
ができるから、従来技術の欠点を除き、ローコストで点
火コイルの自己診断を行なうことができるエンジン制御
装置を容易に提供することができる。As explained above, according to the present invention, abnormality detection of a plurality of ignition coils can be carried out using only one line 11, thereby eliminating the drawbacks of the prior art and allowing self-diagnosis of ignition coils to be performed at low cost. It is possible to easily provide an engine control device that can perform
第Ｌ１１社本発明によるエンジン制＃装置の一実施例を
示す回路図、第２図線その動作説明図である。Company L11 FIG. 2 is a circuit diagram showing an embodiment of the engine control device according to the present invention, and FIG. 2 is an explanatory diagram of its operation.
Claims (1)
のそれぞれごとに独立した通電制御により点火制御を行
なう方式のエンジン制御装置において、上記複数の点火
コイルのそれぞれに対する通電信号を共通に取り出すオ
ア回路を設け、このオア回路の出力レベル判別により点
火コイルの異常を検出するように構成したことを特徴と
するエンジン制御装置。1. In an engine control device that includes a plurality of ignition coils and performs ignition control by independent energization control for each of the plurality of ignition coils, an OR circuit that commonly extracts energization signals for each of the plurality of ignition coils. An engine control device characterized in that it is configured to detect an abnormality in an ignition coil by determining the output level of the OR circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6072285A JPS61223233A (en) | 1985-03-27 | 1985-03-27 | Engine controller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6072285A JPS61223233A (en) | 1985-03-27 | 1985-03-27 | Engine controller |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS61223233A true JPS61223233A (en) | 1986-10-03 |
Family
ID=13150451
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6072285A Pending JPS61223233A (en) | 1985-03-27 | 1985-03-27 | Engine controller |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61223233A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006250099A (en) * | 2005-03-14 | 2006-09-21 | Hitachi Ltd | Spark ignition engine, control device used in the engine, and ignition coil used in the engine |
-
1985
- 1985-03-27 JP JP6072285A patent/JPS61223233A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006250099A (en) * | 2005-03-14 | 2006-09-21 | Hitachi Ltd | Spark ignition engine, control device used in the engine, and ignition coil used in the engine |
| JP4691373B2 (en) * | 2005-03-14 | 2011-06-01 | 日立オートモティブシステムズ株式会社 | Spark ignition engine, control device used for the engine, and ignition coil used for the engine |
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