JPS62170756A - Engine controller - Google Patents
Engine controllerInfo
- Publication number
- JPS62170756A JPS62170756A JP1196586A JP1196586A JPS62170756A JP S62170756 A JPS62170756 A JP S62170756A JP 1196586 A JP1196586 A JP 1196586A JP 1196586 A JP1196586 A JP 1196586A JP S62170756 A JPS62170756 A JP S62170756A
- Authority
- JP
- Japan
- Prior art keywords
- load current
- ground
- input
- current detection
- voltage
- 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
- 238000001514 detection method Methods 0.000 claims description 15
- 230000000694 effects Effects 0.000 description 2
- 239000003990 capacitor Substances 0.000 description 1
- 239000013256 coordination polymer Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000001172 regenerating effect Effects 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
Landscapes
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、エンジン制御装置に係シ、特に、アイドルス
ピードコントロール（以下Ｉ８Ｃ制御という）に好適な
手法に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an engine control device, and particularly to a method suitable for idle speed control (hereinafter referred to as I8C control).
一般に、差動増幅器自体は分類であるが、この差動増幅
器をエンジン制御分野に、中でもＩＳＣ制呻に於ける負
荷電流検出手段に利用した例はない。Generally, the differential amplifier itself is classified, but there is no example of this differential amplifier being used in the engine control field, especially as a load current detection means in ISC control.
一般にエンジン制御装置には、センサやＩＣ用のグラン
ドとして醍われる制御グランドと、アクチュエータ負荷
などが接続される出力グランドとがある。配置的には、
前述の負荷電流検出素子は出力グランドにつながシ、一
方、負荷電流検出回路のグランドは、制御グランドにつ
ながる。ここに於いて、上記出力グランドには大電流が
流れるので、そのたびにこのグランド電位が、制御グラ
ンド電位に対して変動することになる。ここに於いて、
前記負荷電流検出素子は、上記出力グランドにつながっ
ていて、この検出素子に発生した電圧は、制御グランド
の電位変動の影響を受けてしまうので、正確な負荷電流
を検出することができないといり問題がめった。Generally, an engine control device has a control ground that is used as a ground for sensors and ICs, and an output ground that is connected to an actuator load and the like. In terms of layout,
The aforementioned load current sensing element is connected to the output ground, while the ground of the load current sensing circuit is connected to the control ground. Here, since a large current flows through the output ground, the ground potential fluctuates with respect to the control ground potential each time. Here,
The load current detection element is connected to the output ground, and the voltage generated at this detection element is affected by potential fluctuations of the control ground, so there is a problem in that it is not possible to accurately detect the load current. I was disappointed.
本発明の目的は出力グランドの電位が変化しても正確な
負荷電流（負荷電流検出素子により電圧に変換される）
を検出することにある。The purpose of the present invention is to maintain accurate load current (converted to voltage by the load current detection element) even if the output ground potential changes.
The purpose is to detect.
上記目的は、負荷電流横用回路の入力部に差動増幅回路
を用いることによシ達成される。The above object is achieved by using a differential amplifier circuit at the input section of the load current crossing circuit.
差動増幅器は、２つの入力端子相互間の電位差を増幅し
て出力する働きがあるので、基準電位（制御グランド）
に対して一定の電位を持った２点間（負荷電流検出素子
の両端）の電位差を測定することができる。A differential amplifier has the function of amplifying and outputting the potential difference between two input terminals, so the reference potential (control ground)
It is possible to measure the potential difference between two points (both ends of the load current detection element) that have a constant potential with respect to the load current detection element.
以下１本発明の一実施例を第１図によシ説明する。直流
電源１の（ト）側端子は、ソレノイド負荷２及び演算増
幅器３０畦源端子へと接続する。ソレノイド負荷２の両
端は、回生ダイオードＤ３と接続されている。マイクロ
コンピュータ４は、デユーティ信号を発生し、その信号
は、抵抗Ｒ１を介シ、トランジスタ５のベースへと伝え
られる。トランジスタ５のエミッタは負荷電流検出抵抗
６を介し、出力グランド７全通って、直流′−源７の（
→端子へ接続される。負荷電流検出抵抗６の両端。An embodiment of the present invention will be described below with reference to FIG. The (G) side terminal of the DC power supply 1 is connected to the solenoid load 2 and the operational amplifier 30 source terminal. Both ends of the solenoid load 2 are connected to a regenerative diode D3. Microcomputer 4 generates a duty signal, which is transmitted to the base of transistor 5 via resistor R1. The emitter of the transistor 5 is connected to the DC'-source 7 (
→Connected to the terminal. Both ends of load current detection resistor 6.
即ちトランジスタ５のエミッタ側及び出力グランド７側
の端子は夫々、抵抗Ｒ２％又はＲ３を介し演算増幅器の
正相入力端子午）、及び逆相入力端子（→へと接続され
る。演算増幅器３の出力は、抵抗Ｒ７とコンデンサＣ＋
からなる電圧濾波回路を経てマイクロコンピュータ４
へ人力される。又、演算増幅器３及びマイクロコンピュ
ータ４ｏＨ側社源端子、及びこれに付随する回路部品の
グランドは、制御グランド８へと接続される。That is, the emitter side and output ground 7 side terminals of the transistor 5 are connected to the positive phase input terminal () and the negative phase input terminal (→) of the operational amplifier 3 via the resistor R2% or R3, respectively. The output is resistor R7 and capacitor C+
microcomputer 4 through a voltage filter circuit consisting of
is manually powered. Further, the operational amplifier 3 and the microcomputer 4oH side source terminal, and the grounds of circuit components associated therewith, are connected to the control ground 8.
今、マイクロコンピュータ４からのデユーティ信号によ
り、トランジスタ５がＯＮすると、ソレノイド負荷２を
介し、負荷電流ｉＬが流れる。すると負荷電流検出抵抗
６の両端には、この電流ｉＬにより、電圧が誘起される
。この誘起され九慮圧は、夫々演算増幅器３に導びかれ
差動増幅される。即ち、演算増幅器３のグランド電位に
対して出力グランド７の電位がΔＶだけ高いとすると演
算増幅器３の出力端子Ｏには、下記に基づいた電力が出
力される。Now, when the transistor 5 is turned on by the duty signal from the microcomputer 4, a load current iL flows through the solenoid load 2. Then, a voltage is induced across the load current detection resistor 6 by this current iL. These induced pressures are respectively led to operational amplifiers 3 and differentially amplified. That is, assuming that the potential of the output ground 7 is higher than the ground potential of the operational amplifier 3 by ΔV, the output terminal O of the operational amplifier 3 outputs power based on the following.
出力電圧［：Ｖ］＝ＣＰ点の電圧−ΔＶ）ＸＲｓ／８２
以上から１本実施例によれば、制御グランドと出力グラ
ンドの電位が違っていても、出力グランド系に於ける２
点間の電位差を正確に測定することができる。Output voltage [:V] = CP point voltage - ΔV)XRs/82
From the above, according to this embodiment, even if the potentials of the control ground and the output ground are different, the two in the output ground system
The potential difference between points can be measured accurately.
本発明によれば、夫々、異なった電位をもつ制御グラン
ド、及び出力グランド間でも、相互の電位差に影響され
ない正確な電圧信号の伝達及び取多込みができる。According to the present invention, accurate voltage signals can be transmitted and received even between the control ground and the output ground, which have different potentials, without being affected by the mutual potential difference.
図面は１本発明の一実施例を示す回路図である。
ｌ・・・直流電源、２・・・ソレノイド負荷、３・・・
回生ダイｙＦ−）”、４・・・マイクロコンピュータ、
５・・・トランジスタ、６・・・負荷電流検出抵抗、７
・・・出力グランドＳ８・・・制御グランド。The drawing is a circuit diagram showing an embodiment of the present invention. l...DC power supply, 2...Solenoid load, 3...
Regeneration die yF-)”, 4... microcomputer,
5...Transistor, 6...Load current detection resistor, 7
...Output ground S8...Control ground.
Claims (1)
回路と、当該駆動回路内に設けられた負荷電流検出素子
と、当該素子の両端に発生する電圧を検出する負荷電流
検出回路から成るエンジン制御装置に於いて、前記負荷
電流検出素子の両端のうち、電位の高い側を同相入力と
し、残りの一方を逆相入力として前記電流検出回路へ入
力することによつて前記電流検出回路の出力には、上記
２つの信号の差分の電圧が出力される差動増幅器を具備
した電流検出回路を有することを特徴とするエンジン制
御装置。1. An engine control device consisting of an actuator drive circuit that drives a load such as a solenoid, a load current detection element provided in the drive circuit, and a load current detection circuit that detects the voltage generated across the element. By inputting the higher potential side of both ends of the load current detection element to the current detection circuit as an in-phase input and the other end as an anti-phase input, the output of the current detection circuit has the above-mentioned output. An engine control device comprising a current detection circuit equipped with a differential amplifier that outputs a voltage difference between two signals.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1196586A JPS62170756A (en) | 1986-01-24 | 1986-01-24 | Engine controller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1196586A JPS62170756A (en) | 1986-01-24 | 1986-01-24 | Engine controller |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62170756A true JPS62170756A (en) | 1987-07-27 |
Family
ID=11792328
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1196586A Pending JPS62170756A (en) | 1986-01-24 | 1986-01-24 | Engine controller |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62170756A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002343634A (en) * | 2001-05-11 | 2002-11-29 | Denso Corp | Electronic control unit |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60624B2 (en) * | 1977-05-31 | 1985-01-09 | アンリツ株式会社 | Impedance-frequency conversion circuit |
| JPS60141167A (en) * | 1983-12-27 | 1985-07-26 | Meidensha Electric Mfg Co Ltd | Current limiter circuit of switching regulator |
| JPS61144995A (en) * | 1984-12-19 | 1986-07-02 | Hitachi Ltd | Electric current focus circuit of multitubular television camera |
-
1986
- 1986-01-24 JP JP1196586A patent/JPS62170756A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60624B2 (en) * | 1977-05-31 | 1985-01-09 | アンリツ株式会社 | Impedance-frequency conversion circuit |
| JPS60141167A (en) * | 1983-12-27 | 1985-07-26 | Meidensha Electric Mfg Co Ltd | Current limiter circuit of switching regulator |
| JPS61144995A (en) * | 1984-12-19 | 1986-07-02 | Hitachi Ltd | Electric current focus circuit of multitubular television camera |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002343634A (en) * | 2001-05-11 | 2002-11-29 | Denso Corp | Electronic control unit |
| JP4665340B2 (en) * | 2001-05-11 | 2011-04-06 | 株式会社デンソー | Electronic control unit |
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