JPS59192850A - Idling-speed controlling apparatus for engine - Google Patents

Idling-speed controlling apparatus for engine

Info

Publication number
JPS59192850A
JPS59192850A JP6749383A JP6749383A JPS59192850A JP S59192850 A JPS59192850 A JP S59192850A JP 6749383 A JP6749383 A JP 6749383A JP 6749383 A JP6749383 A JP 6749383A JP S59192850 A JPS59192850 A JP S59192850A
Authority
JP
Japan
Prior art keywords
misfiring
engine
signal
engine speed
idle
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.)
Granted
Application number
JP6749383A
Other languages
Japanese (ja)
Other versions
JPH057551B2 (en
Inventor
Takashi Hamamoto
浜本 高志
Hideo Shiraishi
白石 英夫
Chuichi Ueda
上田 忠一
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.)
Mazda Motor Corp
Original Assignee
Mazda Motor Corp
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 Mazda Motor Corp filed Critical Mazda Motor Corp
Priority to JP6749383A priority Critical patent/JPS59192850A/en
Publication of JPS59192850A publication Critical patent/JPS59192850A/en
Publication of JPH057551B2 publication Critical patent/JPH057551B2/ja
Granted legal-status Critical Current

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02DCONTROLLING COMBUSTION ENGINES
    • F02D41/00Electrical control of supply of combustible mixture or its constituents
    • F02D41/02Circuit arrangements for generating control signals
    • F02D41/14Introducing closed-loop corrections
    • F02D41/1497With detection of the mechanical response of the engine
    • F02D41/1498With detection of the mechanical response of the engine measuring engine roughness
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02DCONTROLLING COMBUSTION ENGINES
    • F02D31/00Use of speed-sensing governors to control combustion engines, not otherwise provided for
    • F02D31/001Electric control of rotation speed
    • F02D31/002Electric control of rotation speed controlling air supply
    • F02D31/003Electric control of rotation speed controlling air supply for idle speed control
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02DCONTROLLING COMBUSTION ENGINES
    • F02D2200/00Input parameters for engine control
    • F02D2200/02Input parameters for engine control the parameters being related to the engine
    • F02D2200/10Parameters related to the engine output, e.g. engine torque or engine speed
    • F02D2200/1015Engines misfires

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Combined Controls Of Internal Combustion Engines (AREA)
  • Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)

Abstract

PURPOSE:To improve control of the idling speed, by reducing hunting of the engine speed caused by misfiring when the engine speed is restored to its original level by applying a control signal produced from a misfiring detecting means to an actuator at a lower output than that of ordinary restoring of the engine speed. CONSTITUTION:When misfiring is caused, a driving-voltage generating circuit 17 amplifies a deviation signal G according to a second characteristic line 11 of gain in response to a misfiring signal H produced from a misfiring sensor 11 via a misfiring judging circuit 16. Resultantly, the value of a control signal D is reduced to the same value of the deviation signal G, so that the value of movement of an actuator 6 or a throttle valve is also reduced. Thus, since increasing of the quantity of intake air is small notwithstanding the combined effect of increasing of the engine speed due to elimination of misfiring and that caused by increasing of the quantity of intake air, the engine speed is raised gently and converged to an aimed value immediately when it becomes equal to the aimed value. Therefore, it is enabled to prevent hunting of the engine speed at a large amplitude when misfiring is caused.

Description

【発明の詳細な説明】 (産業上の利用分野) この発明は、自動重要エンジンのアイドル回転数詞tl
Il装置に関する。
DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) This invention provides an automatic critical engine idle speed tl
Regarding the Il device.

(従来の問題点) 例えば、特開昭54−62419号公報に開示されてい
るように、アイドル時の回転数を制御するようにしたエ
ンジンが提案されている。この種のエンジンにおいては
、アイドル時の回転数が何等かの原因で予め設定された
目標回転数より低下した時に、これを該目標回転数に復
帰させるように制御装置が作動するが、一部の気筒が失
火することに起因して回転数が低下した場合には次のよ
うな問題が生じる。
(Conventional Problems) For example, as disclosed in Japanese Patent Application Laid-Open No. 54-62419, an engine has been proposed in which the number of revolutions during idling is controlled. In this type of engine, when the engine speed during idling falls below a preset target speed for some reason, the control device operates to return the engine speed to the target speed. If the engine speed decreases due to a misfire in one of the cylinders, the following problem occurs.

即ち、失火現象は多くの場合比較的短時間のうちに解消
されて、エンジン回転数も自然に復帰Jるのであるが、
その場合に制御装置が回転数を上昇さけるように作動す
ると、この作動による回転数の上Rと自然復帰ににる回
転数の上背とが競合して、該回転数が目標回転数を大き
く上回ってしまうのである。そして、このオーバーシュ
ートを解消すべく、制御装置は次に回転数を(i(下さ
せるにうに作動するが、その結果、回転数が大きな振幅
でハンチングすることになる。このような現象は、アイ
ドル回転数を制御しようとする本来の目的に反し、アイ
ドル回転数制御システムの存在自体が問われることにな
る。
In other words, in most cases, the misfire phenomenon is resolved within a relatively short period of time, and the engine speed returns naturally.
In that case, if the control device operates to avoid increasing the rotational speed, the upper R of the rotational speed due to this operation and the upper back of the rotational speed that will naturally return will compete, causing the rotational speed to greatly exceed the target rotational speed. It exceeds it. In order to eliminate this overshoot, the control device then operates to lower the rotation speed (i), but as a result, the rotation speed will hunt with a large amplitude. Such a phenomenon is caused by This contradicts the original purpose of controlling the idle speed, and the very existence of the idle speed control system is called into question.

(光  明  の  目  的) 本発明は、アイドル回転数を制御するエンジンにおりる
上記の如き問題に対処するもので、失火による回転数の
低下に対してこれを復帰させようとりる制御動作に基づ
くハンチングを防止し或いは可及的軽減覆ることを目的
とする。これにより、アイドル回転数が良好に制御され
、ひいてはアイドル時の燃料消費量が低減されるエンジ
ンを実現する。
(Purpose of Light) The present invention is intended to deal with the above-mentioned problem in an engine that controls the idle speed. The purpose is to prevent hunting based on this, or to reduce and cover it as much as possible. This achieves an engine in which the idle speed is well controlled and the fuel consumption during idle is reduced.

(発  明  の  構  成) 本発明は、上記目的達成のため次のように構成したこと
を特徴とする。
(Structure of the Invention) The present invention is characterized by the following structure in order to achieve the above object.

先ず、本発明のアイドル回転数制御装置は、基本釣には
、エンジン回転数を検出する回転数検出手段と、エンジ
ンに供給される吸気量を制御するアクチュエータと、エ
ンジンのアイドル状態を検出するアイドル検出手段と、
該アイドル検出手段の出力を受けてアイドル時に上記回
転数検出手段からの信号と予め設定された目標回転数に
対応した信号とを比較する比較手段と、該比較手段の出
力を所定の利得(第1の利18)で上記アクテコ1−夕
に送る制御信号送給手段とから構成される。
First, the idle speed control device of the present invention basically includes a speed detecting means for detecting the engine speed, an actuator for controlling the amount of intake air supplied to the engine, and an idle speed detecting means for detecting the idle state of the engine. detection means;
Comparing means receives the output of the idle detection means and compares the signal from the rotation speed detection means during idling with a signal corresponding to a preset target rotation speed; 1, the actuator 1 is comprised of a control signal sending means for sending the actuator 1 to the actuator 1.

そして、本発明においては、上記構成に加えて、エンジ
ンの失火を検出する失火検出手段が備えられると共に、
該失火検出手段の出力を受りて、上記制御信号送給手段
が失火時に上記第1の利得より小さい第2の利1qで比
較手段の出ツノをアクチュエータに送るように構成され
る。
In the present invention, in addition to the above configuration, a misfire detection means for detecting a misfire in the engine is provided, and
In response to the output of the misfire detection means, the control signal sending means is configured to send the output of the comparison means to the actuator at a second gain 1q that is smaller than the first gain when a misfire occurs.

制御信号送給手段は、比較手段の出力、即ち現実のアイ
ドル回転数と目標アイドル回転数との偏差に対応した出
力を所定の利得でアクヂュ1−夕に送り、該アクチュエ
ータを上記偏差が解消される方向に作動させる。例えば
現実のアイドル回転数が目、標目転数より低い場合は、
スロットル弁又は吸気通路に設けられたバイパスの開度
を人さくして吸気■を多くし、逆にアイドル回転数が目
標回転数より高い場合は、スロットル弁又はバイパスを
絞って吸気量を少なくさせる。その場合に、通常の制御
に際しては、上記利得が比較的大きいのでアクチュエー
タの動作量も大きく、従って回転数を復帰させる制御が
速かに行われるが、失火時におりる制御に際しては、上
記利得が通常時よりも小さくされるので、復帰制御がア
クチュエータの小さな動作によって緩かに行われる。
The control signal sending means sends the output of the comparing means, that is, the output corresponding to the deviation between the actual idle speed and the target idle speed, to the actuator 1-1 with a predetermined gain, and controls the actuator until the deviation is eliminated. Operate in the direction shown. For example, if the actual idle speed is lower than the target or target speed,
The opening degree of the throttle valve or the bypass provided in the intake passage is made small to increase the amount of intake air.Conversely, when the idle rotation speed is higher than the target rotation speed, the throttle valve or the bypass is throttled to reduce the amount of intake air. In this case, in normal control, since the above gain is relatively large, the amount of actuator operation is also large, and control to restore the rotation speed is performed quickly. Since it is made smaller than normal, return control is performed slowly by small movements of the actuator.

ここで、失火時における制御信号送給手段の第2の利得
は、通常時の第1の利得より小さ【プればよく、従って
零の場合も含まれる。この場合、該送給手段は比較器の
出力をアクチュエータに送らないことになるが、失火に
よるエンジン回転数の低下は自然復帰でるので、アクチ
ュエータを作動させての積極的な復帰動作が行われなく
てb良いのである。
Here, the second gain of the control signal sending means at the time of a misfire need only be smaller than the first gain at the normal time, and therefore, the case of zero is also included. In this case, the feeding means will not send the output of the comparator to the actuator, but since the drop in engine speed due to a misfire will return naturally, the actuator will not be activated to actively recover. That's good.

(発  明  の  効  果) 上記の如き構成によれば、失火によりエンジン回転数が
低下した時には復帰制御が緩かに行われる(又は行われ
ない)ので、失火解消による回転数の上昇と急速な復帰
制御による回転数のTRとが競合して該回転数が大きく
オーバーシュー1−するといったことがなくなる。これ
により、この秤のアイドル回転数を制御するエンジンに
おいて、失火時にエンジン回転数が大きな振幅でハンチ
ングすることが防止され、制御性が改善されて常に所望
づる一定のアイドル回転数に保持されることになる。
(Effects of the Invention) According to the above configuration, when the engine speed decreases due to a misfire, the recovery control is performed slowly (or not), so that the speed rises due to the misfire being resolved and the engine speed rapidly increases. There is no possibility that the rotational speed will greatly overshoot due to competition with the rotational speed TR caused by the return control. As a result, in the engine that controls the idle speed of this scale, the engine speed is prevented from hunting with a large amplitude in the event of a misfire, and controllability is improved and the desired constant idle speed is always maintained. become.

(実  施  例) 以下、本発明を図面に示す実施例についで説明する。(Example) The present invention will be described below with reference to embodiments shown in the drawings.

第1図に示すにうにエンジン1の吸気通路2には、エア
クリーナ3側から気化器4及びスロットル弁5が設(プ
られていると共に、該スロワ1〜ル弁5を開閉制御する
アクチュエータ6と、該スロワ1〜ル弁5の全閉状態を
検出するアイドル検出手段7とが備えられており、また
、該エンジン1には回転数を検出する回転数センサ8が
描えられている。更に、該エンジン1の燃焼室9には、
点火栓10と共に失火センサー1が備えられている。こ
の失火センサー1としては、例えば燃焼室9内の温1身
又は圧力を検出する温度ヒンザ又は圧力センサが用いら
れる。そして、上記アイドルスイッチ7からのスロット
ル弁5が全開状態であることを示すスロツ1〜ル全閉信
号Aと、回転数センサ8からのエンジン回転数を示す回
転数信号Bと、失火セン+J11からの燃焼室9内の温
度又は圧力を示づ信号Cとが夫々入力される制御回路1
2が備えられ、且つ該制御回路12から上記アクチュエ
ータ6に制御信号りが出力されるように構成されている
As shown in FIG. 1, a carburetor 4 and a throttle valve 5 are installed in the intake passage 2 of the engine 1 from the air cleaner 3 side, and an actuator 6 for controlling the opening and closing of the throttle valves 1 to 5. , idle detection means 7 for detecting the fully closed state of the throttle valves 1 to 5 are provided, and a rotation speed sensor 8 for detecting the rotation speed is depicted on the engine 1. , in the combustion chamber 9 of the engine 1,
A misfire sensor 1 is provided together with a spark plug 10. As the misfire sensor 1, for example, a temperature sensor or a pressure sensor that detects the temperature or pressure in the combustion chamber 9 is used. Then, the throttle valves 1 to 1 are fully closed signal A from the idle switch 7 indicating that the throttle valve 5 is fully open, the rotation speed signal B indicating the engine rotation speed from the rotation speed sensor 8, and the engine speed signal B from the misfire sensor +J11. A control circuit 1 to which a signal C indicating the temperature or pressure inside the combustion chamber 9 is inputted.
2, and is configured such that the control circuit 12 outputs a control signal to the actuator 6.

然して上記制御回路12は、第2図に示ずJ:うに、ア
イドルスイッチ7からのスロットル全開信号Aと回転数
センサ8からの回転数信号Bとが入力されるアイドル判
定回路13と、予め設定された一定電圧の目標アイドル
回転数信号Eを発生す鷹 る設定電圧発生回路14と、該回路14からの目標アイ
ドル回転改悟@Eと上記回転センサ8からの回転信号B
とが入力される比較回路15と、上記失火センサ11か
らの燃焼室温度又は圧力を示す信号Cが入力される失火
判定回路16と、更に上記アクチュエータ6に制御信号
りを出ツノ−4る駆動電圧発生回路17とから構成され
ている。
However, the control circuit 12 includes an idle determination circuit 13, which is not shown in FIG. A set voltage generating circuit 14 generates a target idle rotation speed signal E of a constant voltage, a target idle rotation speed signal E from the circuit 14, and a rotation signal B from the rotation sensor 8.
a comparison circuit 15 to which the signal C is input; a misfire determination circuit 16 to which the signal C indicating the combustion chamber temperature or pressure from the misfire sensor 11 is input; It is composed of a voltage generating circuit 17.

上記アイドル判定回路13は、スロットル全開信号Aが
入力され且つ回転数信号Bが示すエンジン回転数が設定
値以下の時にエンジン1がアイドル状態にあると判定し
、アイドル信@Fを上記駆動電圧発生回路17に対して
出力する。これにより、該駆動電圧発生回路17が作動
可能な状態とされる。また、上記比較回路15は回転数
信号Bと目標アイドル回転数信号Eとを比較し、その差
に応じた電圧の偏差信号Gを駆動電圧発生回路17に対
して出力する。更に、失火判定回路16は信号Cが示す
燃焼室9内の温度又は圧力に基づいて該燃焼室9におい
て失火が発生したか否かを判定し、失火の発生を判定し
た時に駆動電圧発生回路17に対して失火信号Hを出力
する。
The idle determination circuit 13 determines that the engine 1 is in an idle state when the fully open throttle signal A is input and the engine rotation speed indicated by the rotation speed signal B is below a set value, and generates the idle signal @F to the drive voltage. Output to circuit 17. Thereby, the drive voltage generation circuit 17 is brought into an operable state. Further, the comparison circuit 15 compares the rotational speed signal B and the target idle rotational speed signal E, and outputs a voltage deviation signal G corresponding to the difference to the drive voltage generation circuit 17. Furthermore, the misfire determination circuit 16 determines whether a misfire has occurred in the combustion chamber 9 based on the temperature or pressure within the combustion chamber 9 indicated by the signal C, and when determining that a misfire has occurred, the drive voltage generation circuit 17 A misfire signal H is output to the engine.

そして、駆動電圧発生回路17は、アイドル信号Fの入
力時に作動して、偏差信8Gを第3図に実線で示す第1
利得特性■に従って増幅した上で、これを上記制御信号
りとしてアクチュエータ6に送るように構成されている
が、失火信号ト1が入力された場合には、偏差信号Gに
対Jる制御信号りの利得が第3図に鎖線で示1−第1利
1q特性■より勾配が小さい第2利得特性■に従うよう
に構成されている。
The drive voltage generation circuit 17 is activated when the idle signal F is input, and generates a deviation signal 8G from the first output signal indicated by the solid line in FIG.
The structure is such that it is amplified according to the gain characteristic (2) and then sent to the actuator 6 as the above-mentioned control signal. However, when the misfire signal (T1) is input, the control signal (J) corresponding to the deviation signal (G) is The structure is such that the gain follows the second gain characteristic (2) shown by the chain line in FIG. 3, which has a smaller slope than the 1-first gain (1q) characteristic (2).

上記の如き構成によれば、エンジン1がアイドル状態に
ある場合は、アイドルスイッチ7及び回転センサ8から
の信号A、Bに基づいて制御回路12におけるアイドル
判定回路13から駆動電圧発生回路17にアイドル信号
Fが出力され、該駆動電圧発生回路17が動作可能な状
態とされる。
According to the above configuration, when the engine 1 is in the idle state, the idle determination circuit 13 in the control circuit 12 outputs the drive voltage generation circuit 17 to the drive voltage generating circuit 17 based on the signals A and B from the idle switch 7 and the rotation sensor 8. Signal F is output, and drive voltage generation circuit 17 is made operable.

この状態にJ5いて、上記回転センサ8から出力される
現実のエンジン回転数(アイドル回転数)を示す回転数
信号Bと、設定電圧発生回路14から出力される目標ア
イドル回転数信号Eの電圧Vb。
In this state J5, the rotation speed signal B indicating the actual engine rotation speed (idle rotation speed) output from the rotation sensor 8 and the voltage Vb of the target idle rotation speed signal E output from the set voltage generation circuit 14. .

Veに差があると、比較回路15から上記駆動電圧発生
回路17に対してその差に対応した電圧Vりの偏差信号
Gが出力される。そして、該駆動電圧発生回路17がこ
の偏差信513 Gを所定の利得で増幅して制御信号D
(電圧Vd )としてアクチュエータ6に送る。これに
より、アクチュエータ6が制御信号りの電圧値に応じた
聞だけスロワ1−ル弁5を開閉制御し、エンジン回転数
が目標アイドル回転数より小さい場合は吸気量を多くし
、その逆の場合は吸気量を少なくして該エンジン回転数
を目標アイドル回転数に復帰さける。
If there is a difference in Ve, the comparison circuit 15 outputs to the drive voltage generation circuit 17 a deviation signal G with a voltage V corresponding to the difference. Then, the drive voltage generation circuit 17 amplifies this deviation signal 513G with a predetermined gain and generates a control signal D.
(voltage Vd) and sent to the actuator 6. As a result, the actuator 6 controls the opening and closing of the throttle valve 5 only according to the voltage value of the control signal, and increases the intake air amount when the engine speed is lower than the target idle speed, and vice versa. The engine speed is returned to the target idle speed by reducing the amount of intake air.

この場合において、上記駆動電圧発生回路17における
偏差信号Gに対する制御信号りの利得は、エンジン回転
数と目標アイドル回転数との差がエンジン1の失火に起
因するものでない場合は第3図の第1利4rF特性1に
従う比較的大ぎな値であるから、制御信号りの電圧Vd
が大きくなり、これに伴ってアクチュエータ6を介して
スロットル弁5が大きく開閉制御されることになる。こ
れにより、回転数の復帰制御が速かに行われる。
In this case, the gain of the control signal relative to the deviation signal G in the drive voltage generating circuit 17 is as shown in FIG. Since it is a relatively large value according to the 1-4rF characteristic 1, the voltage Vd of the control signal
becomes larger, and accordingly, the throttle valve 5 is controlled to open and close more greatly via the actuator 6. As a result, the rotation speed can be quickly restored.

然して、失火に起因してエンジン回転数が目標アイドル
回転数より低下した場合に、上記第1の利得特性工に従
う大きな利得で制御信号りが出力されると、アクチュエ
ータ6を介してスロワ1〜ル弁5が人きく間かれ、失火
解消によるエンジン回転数の上昇と吸気量のO激な増加
とが競合して、該エンジン回転数が第4図(a>に示す
ように急速に上昇づることになる。そのため、目標回転
数を大きく上回り、これに伴って大きな振幅のハンチン
グか発生づる。
However, when the engine speed falls below the target idle speed due to a misfire, if a control signal is output with a large gain according to the first gain characteristic, the throttles 1 to 1 are output via the actuator 6. When the valve 5 is closed, the increase in the engine speed due to the elimination of the misfire and the sharp increase in the intake air amount compete with each other, causing the engine speed to rise rapidly as shown in Fig. 4 (a>). As a result, the target rotational speed is greatly exceeded, and hunting with a large amplitude occurs accordingly.

しかし失火時には、上記駆動電圧発生回路17が失火セ
ンサ1]から失火判定回路16を介して出力される失火
信号ト1を交番プて、第3図に鎖線て示づ第2の利得特
性■に従って偏差信号Gを増幅Jる。そのため、制御信
号りは同一値の偏差信号Gに対して上記の場合より値が
小さくなり、これに伴ってアクチュエータ6ないしスロ
ットル弁5の動作量も小さくなる。これにより、失火解
消にJ、るエンジン回転数の上昇と吸気量の増加による
エンジン回転数の上昇とが競合しても、吸気量の増加は
わずかであるからエンジン1は第4図(b)に示すよう
に緩かに回転数が上昇することになり、目標回転数に達
した時点で直ちに該目標回転数に収束される。
However, in the event of a misfire, the driving voltage generating circuit 17 alternately outputs the misfire signal T1 outputted from the misfire sensor 1 via the misfire determination circuit 16, and according to the second gain characteristic shown by the chain line in FIG. Amplify the deviation signal G. Therefore, the value of the control signal R becomes smaller than in the above case with respect to the deviation signal G having the same value, and accordingly, the amount of operation of the actuator 6 or the throttle valve 5 also becomes smaller. As a result, even if the increase in engine speed to eliminate the misfire competes with the increase in engine speed due to the increase in intake air amount, the increase in intake air amount is small, so engine 1 is as shown in Figure 4 (b). As shown in the figure, the rotational speed increases gradually, and when it reaches the target rotational speed, it immediately converges to the target rotational speed.

尚、駆動電圧発生回路17の第2刊1gが零の場合は、
失火時におりるエンジン回転数の低下は失火解消によっ
てのみ復帰されることになる。
In addition, when the second edition 1g of the drive voltage generation circuit 17 is zero,
The drop in engine speed that occurs during a misfire can only be recovered by eliminating the misfire.

また、上記実施例においてはアイドル信号Fを直接駆動
電圧発生回路17に入力して該回路17を作動させる(
I4成としたが、該)アイドル信号Fを比較回路15に
入ツノして、アイドル時にのみ偏差化8Gを出力するよ
うにしてもよく、蟹するにアイドル信号Fの入力に基づ
いて、アイドル時のみ駆動電圧発生回路17から制御信
号りが出ツノされる促成であればJ:い。
Further, in the above embodiment, the idle signal F is directly input to the drive voltage generation circuit 17 to operate the circuit 17 (
Although the idle signal F is set to I4, it is also possible to input the idle signal F into the comparison circuit 15 and output the deviation 8G only at the idle time. If only the control signal is generated from the drive voltage generation circuit 17, then J: Yes.

更に、アクチュエータ6゛による吸気量の制御は、スロ
ワ1〜ル弁5の間1M1制御の他に、吸気通路2に設け
られたバイパスの開度を制御してもにい。
Furthermore, the intake air amount can be controlled by the actuator 6' by controlling the opening degree of a bypass provided in the intake passage 2, in addition to the 1M1 control between the throat valve 1 and the throat valve 5.

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

図面は本発明の実施例を示すもので、第1図は制御シス
テム図、第2図は第1図にJ−3ける制御回路の構成を
示づブロック図、第3図は利得特性図、第4図は作用を
示すエンジン回転数の経時変化図である。 6・・・アクチュエータ、7,8.13・・・アイドル
検出手段(7・・・アイドルスイッチ、8・・・回φ元
数センザ、13・・・アイドル判定回路〉、11、]6
・・・失火検出手段(11・・・失火センサ、16・・
・失火判定回路)、15・・・比較手段(比較回1)、
17・・・制御信号送給手段(駆動電圧発生回路) 第2図 I L−一−−−−−−−−−〜−−−J (ロ)(罷4:) (b)C本!$) 291− 第3図   い
The drawings show an embodiment of the present invention, and FIG. 1 is a control system diagram, FIG. 2 is a block diagram showing the configuration of the control circuit in J-3 in FIG. 1, and FIG. 3 is a gain characteristic diagram. FIG. 4 is a diagram showing the change in engine speed over time showing the effect. 6...Actuator, 7,8.13...Idle detection means (7...Idle switch, 8...Times φ element sensor, 13...Idle judgment circuit>, 11,]6
... misfire detection means (11... misfire sensor, 16...
・Misfire determination circuit), 15... comparison means (comparison time 1),
17...Control signal sending means (driving voltage generation circuit) Fig. 2 I L-1----------------J (B) (Stroke 4:) (b) Book C! $) 291- Figure 3

Claims (1)

【特許請求の範囲】[Claims] (1)  エンジン回転数を検出する回転数検出手段と
、エンジンに供給される吸気量を制御するアクチュエー
タと、エンジンのアイドル状態を検出するアイドル検出
手段と、エンジンの失火を検出Jる失火検出手段と、上
記アイドル検出手段の出力を受1ノでアイドル時に上記
回転数検出手段からの信号と目標回転数に対応した信号
とを比較する比較手段と、該比較手段の出力を通常は第
1の利得で上記アクチュエータに送る一方、上記失火検
出手段の出力を受Iフて失火時には第1の利得より小さ
い第2の利得で比較手段の出力をアクチュエータに送る
制御信号送給手段とから構成したことを特徴とするエン
ジンのアイドル回転数制御装置。
(1) A rotation speed detection means for detecting the engine rotation speed, an actuator for controlling the amount of intake air supplied to the engine, an idle detection means for detecting the idle state of the engine, and a misfire detection means for detecting a misfire in the engine. and a comparison means which receives the output of the idle detection means and compares the signal from the rotation speed detection means with a signal corresponding to the target rotation speed during idling, and the output of the comparison means is normally compared to a first and a control signal sending means that sends the output of the misfire detection means to the actuator at a gain, and receives the output of the misfire detection means and sends the output of the comparison means to the actuator at a second gain smaller than the first gain in the event of a misfire. An engine idle speed control device featuring:
JP6749383A 1983-04-15 1983-04-15 Idling-speed controlling apparatus for engine Granted JPS59192850A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6749383A JPS59192850A (en) 1983-04-15 1983-04-15 Idling-speed controlling apparatus for engine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6749383A JPS59192850A (en) 1983-04-15 1983-04-15 Idling-speed controlling apparatus for engine

Publications (2)

Publication Number Publication Date
JPS59192850A true JPS59192850A (en) 1984-11-01
JPH057551B2 JPH057551B2 (en) 1993-01-29

Family

ID=13346566

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6749383A Granted JPS59192850A (en) 1983-04-15 1983-04-15 Idling-speed controlling apparatus for engine

Country Status (1)

Country Link
JP (1) JPS59192850A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05263690A (en) * 1992-03-23 1993-10-12 Mitsubishi Electric Corp Idling control device of engine

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57188748A (en) * 1981-05-18 1982-11-19 Mazda Motor Corp Idle rotation controller for engine

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57188748A (en) * 1981-05-18 1982-11-19 Mazda Motor Corp Idle rotation controller for engine

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05263690A (en) * 1992-03-23 1993-10-12 Mitsubishi Electric Corp Idling control device of engine

Also Published As

Publication number Publication date
JPH057551B2 (en) 1993-01-29

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