JPH0374541A - Engine speed controlling device - Google Patents

Engine speed controlling device

Info

Publication number
JPH0374541A
JPH0374541A JP20655890A JP20655890A JPH0374541A JP H0374541 A JPH0374541 A JP H0374541A JP 20655890 A JP20655890 A JP 20655890A JP 20655890 A JP20655890 A JP 20655890A JP H0374541 A JPH0374541 A JP H0374541A
Authority
JP
Japan
Prior art keywords
throttle valve
detector
engine
opening degree
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
JP20655890A
Other languages
Japanese (ja)
Other versions
JPH0578664B2 (en
Inventor
Masumi Kinugawa
眞澄 衣川
Tomihide Suzuki
鈴木 富英
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.)
Denso Corp
Original Assignee
NipponDenso 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 NipponDenso Co Ltd filed Critical NipponDenso Co Ltd
Priority to JP20655890A priority Critical patent/JPH0374541A/en
Publication of JPH0374541A publication Critical patent/JPH0374541A/en
Publication of JPH0578664B2 publication Critical patent/JPH0578664B2/ja
Granted legal-status Critical Current

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  • Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
  • Combined Controls Of Internal Combustion Engines (AREA)

Abstract

PURPOSE:To improve the controllability by memorizing an opening degree of a throttle valve when the throttle valve is detected to be at an idling position by an idling detector, and controlling an actuator at the memorized opening degree when the throttle valve is detected not to be at the idling position. CONSTITUTION:A lever 5 is fixed at one end of a shaft 4 of a throttle valve 3 provided in the middle of a suction pipe 2, and one end of it is applied to a control shaft 7 of a DC motor 6 for controlling the opening degree at the time of idling. An accelerator is interlocked and connected with a knob 8 provided at the other end of the lever 5 through a link. A throttle valve opening degree detector 14 is provided at the other end of the shaft 4, and an idling detector 19 is provided close to the control shaft. By inputting output signals of these, if an engine is detected to be in the condition of transition by a control unit 13 when idling is detected, the opening degree of the throttle valve at that time is memorized, and the DC motor 6 is driven and controlled based on the memorized opening degree of the throttle valve.

Description

【発明の詳細な説明】 (産業上の利用分野) 本発明は火花点火式エンジンのアイドル回転速度を制御
する装置に係り、特に絞り弁のアイドル時の開度を直接
制御して前記回転速度を制御するものに係る。
DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a device for controlling the idle rotation speed of a spark ignition engine, and in particular to a device for controlling the idle rotation speed of a spark ignition engine, and particularly for controlling the rotation speed by directly controlling the opening degree of a throttle valve at idle. It concerns what is controlled.

(従来の技術) エンジンのアイドル回転速度を閉ループ制御してエンジ
ンの状態に応じて常に所望の回転速度に保つため種々の
構成の提案がすでになされている。
(Prior Art) Various configurations have already been proposed for closed-loop control of the idle rotational speed of an engine to always maintain it at a desired rotational speed depending on the state of the engine.

絞り弁の開度制御により、エンジン回転速度を制御l!
する装置にあっては、エンジン回転速度を検出し、それ
を目標回転速度と比較して目標回転速度を維持するよう
回転速a制御が行なわれる。
Control the engine speed by controlling the throttle valve opening!
In such a device, the engine rotational speed is detected, and the engine rotational speed is compared with a target rotational speed to maintain the target rotational speed, so that rotational speed a control is performed.

しかし、アイドル時ではスロットル開度を変化させても
、回転速度が変化するまで時間遅れが大きく、エンジン
が非安定状態では回転速度制御に優れた追従性を得るこ
とは困難であった。
However, when the engine is idling, even if the throttle opening is changed, there is a large time delay until the rotational speed changes, and when the engine is in an unstable state, it is difficult to obtain excellent followability in rotational speed control.

一方、これの改善のために、エンジ、ン回転速度が絞り
弁開度に対応する特性を生かし、絞り弁開度を検出し、
目標絞り弁開度を維持するよう絞り弁開度制御を行って
追従性、応答性を良くするものが考えられる。
On the other hand, in order to improve this, the throttle valve opening can be detected by taking advantage of the characteristic that the engine rotation speed corresponds to the throttle valve opening.
A conceivable method is to perform throttle valve opening control to maintain the target throttle valve opening to improve followability and responsiveness.

しかし、この絞り弁開度制御では、開度に対する回転速
度の変化率が大きく、エンジンのアイドル安定状態では
満足すべき制御精度を得ることは困難であった。
However, in this throttle valve opening control, the rate of change in rotational speed relative to the opening is large, making it difficult to obtain satisfactory control accuracy when the engine is in a stable idle state.

(発明が解決しようとする課題〉 本発明は前記問題点に鑑みなされたもので、アイドル検
出器により絞り弁がアイドル位置にあることが検出され
た時に、開度検出器によって検出されたアイドル時の絞
り弁の開度を記憶しておき、アイドル検出器により絞り
弁がアイドル位置にないことが検出された時、記憶され
ている開度によりアクチュエータを制御することでアク
チュエータが絞り弁と当接していない時でもアクチュエ
ータを適切な位置に保つことができるエンジンの回転速
度制御装置を提供することを目的としている。
(Problems to be Solved by the Invention) The present invention has been made in view of the above-mentioned problems. The opening degree of the throttle valve is memorized, and when the idle detector detects that the throttle valve is not at the idle position, the actuator is brought into contact with the throttle valve by controlling the actuator according to the memorized opening degree. An object of the present invention is to provide an engine rotation speed control device that can maintain an actuator in an appropriate position even when the engine is not in use.

(21!題を解決つるだめの手段) 上記目的を達成するために、本発明は、吸気管に設けら
れた絞り弁と、 該絞り弁の開度を変える作動器と、 前記絞り弁の開度を検出する開度検出器と、エンジンの
回転速度を検出する回転数検出手段と、 前記絞り弁がアイドル位置にあることを検出するアイド
ル検出器と、 前記開度検出器、前記アイドル検出器、及び前記回転速
度検出器からの信号に基づいて前記作動器を制御する制
御器と有するエンジンのアイドル回転速度制tm′v装
置であって、 前記制御器は、 あらかじめ設定された目標速度と前記回転速度検出器よ
り得られた回転速度とを比較して、前記回転速度が前記
目標速度となるように前記作動器を制御する回転速度υ
j御千手段、 あらかじめ設定された目標開度と前記開度検出器より得
られた絞り弁開度とを比較して、前記絞り弁!j1度が
前記目標速度となるように前記作動器を制御する絞り弁
開度制御手段と、 前記エンジンが安定したアイドル運転状態にあるか否か
を判定し、 前記アイドル検出器にて検出されたアイドル状態にあり
、かつ前記エンジンが安定したアイドル運転状態である
と判定した時は前記回転速度制御手段の出力を、 また前記アイドル検出器で検出されたアイドル状態であ
っても、前記エンジンが安定したアイドル運転状態でな
い過渡状態であると判定した時には前記絞り弁開度制御
手段の出力をそれぞれ選択する選択手段と、 前記選択手段の出力により前記作動器をアクチュエータ
を駆動するドライバとを備えたエンジンの回転速度制御
装置としている。
(21! Means for Solving the Problem) In order to achieve the above object, the present invention provides a throttle valve provided in an intake pipe, an actuator that changes the opening degree of the throttle valve, and an actuator that changes the opening degree of the throttle valve. an opening detector that detects the engine rotational speed; a rotational speed detection means that detects the rotational speed of the engine; an idle detector that detects that the throttle valve is in the idle position; the opening detector and the idle detector. and a controller for controlling the actuator based on a signal from the rotation speed detector, the controller comprising: a preset target speed and a controller for controlling the actuator based on a signal from the rotation speed detector; A rotation speed υ that controls the actuator so that the rotation speed becomes the target speed by comparing the rotation speed obtained from the rotation speed detector.
Compare the preset target opening with the throttle valve opening obtained from the opening detector, and compare the throttle valve opening obtained from the opening detector. a throttle valve opening control means for controlling the actuator so that j1 degree is the target speed; and determining whether the engine is in a stable idle operating state, and determining whether or not the engine is in a stable idle operating state, When the engine is in an idling state and it is determined that the engine is in a stable idling state, the output of the rotational speed control means is controlled. and a driver for driving the actuator according to the output of the selection means, and a driver for driving the actuator based on the output of the selection means. This is a rotation speed control device.

また、本発明の好適な実施例ではさらに絞り弁がアイド
ル位置にない時には目標値を絞り弁開度が開く方向に引
き上げてアクチュエータの絞り弁との当接部分の位置を
それに合わせて開いた状態にヒツトしておき絞り弁が再
びアイドル時の開度を!II mするアクチュエータに
当接しかつ吸気管圧力が設定圧力以上またはエンジン回
転速度がアイドル目標回転よりも高いある設定値以下に
なった時、回転速度の閉ループ制御または目標値に対す
るアイドル時の開度との比較制御を開始する様にしてダ
ッシュポットの様な特別な装置を付加する必要のないエ
ンジンの回転速度制御装置としている。
Further, in a preferred embodiment of the present invention, when the throttle valve is not in the idle position, the target value is raised in the direction in which the throttle valve opening degree opens, and the position of the contact portion of the actuator with the throttle valve is opened accordingly. Hit the throttle valve again to open at idle! When the intake pipe pressure is above the set pressure or the engine speed is below a certain set value that is higher than the idle target speed, the rotation speed is controlled in a closed loop or the opening degree at idle relative to the target value is controlled. This is an engine rotation speed control device that does not require the addition of a special device such as a dashpot.

(実施例) 以下、添附図面に示された本発明装置の一実施例につい
て説明する。
(Example) Hereinafter, an example of the apparatus of the present invention shown in the accompanying drawings will be described.

第1図は燃料噴射の!llI!lとアイドル時のエンジ
ン回転速度の1bll IIを1つのマイクロコンピュ
ータにもちいでおこなう装置の実施例を示す。
Figure 1 shows fuel injection! llI! An embodiment of a device is shown in which a single microcomputer is used to calculate l and 1bll II, which is the engine rotational speed at idle.

エンジン1の吸気管2の途中に絞り弁3が設けられ絞り
弁3はシャフト4を中心にして回動自由になっており図
示しないバネにより全開側(A方向)に付勢されている
。シャフト4に固定されたレバー5はアイドル時の開度
をflill Illする直流モータ6のi、lI m
シャフト7に当接する。
A throttle valve 3 is provided in the middle of an intake pipe 2 of the engine 1, and the throttle valve 3 is freely rotatable about a shaft 4, and is biased toward the fully open side (direction A) by a spring (not shown). A lever 5 fixed to the shaft 4 controls the i, lI m of the DC motor 6 which controls the opening degree at idle.
It comes into contact with the shaft 7.

レバー5は直流モータ6に当接する側と逆の方向にノブ
8がありこのノブ8は運転者によって操作されるアクセ
ル〈図示されていない〉とリンクで接続されている。直
流モータ6の制御シャフト7の先端部はバネ9でレバー
5側に付勢された可動シャフト10がある。この可動シ
ャフト1oと1I111 mシャフト7にそれぞれ電気
接点11.12が固定されており、この電気接点11.
12は絞り弁3がバネ9によりて付勢される力によりレ
バー5を可動シャフト10に当接さ吐た時には可動シャ
フト10はバネ9の付勢力に打ち勝って後退し電気接点
11.12が当接して電気回路を閉じる様になっている
The lever 5 has a knob 8 on the side opposite to the side that contacts the DC motor 6, and this knob 8 is connected by a link to an accelerator (not shown) operated by the driver. At the tip of the control shaft 7 of the DC motor 6 is a movable shaft 10 that is biased toward the lever 5 by a spring 9. Electric contacts 11.12 are fixed to the movable shafts 1o and 1I111m shafts 7, respectively.
Reference numeral 12 indicates that when the lever 5 is brought into contact with the movable shaft 10 by the force biased by the spring 9 and the throttle valve 3 is discharged, the movable shaft 10 overcomes the biasing force of the spring 9 and retreats, causing the electric contacts 11 and 12 to contact each other. It is designed to close an electrical circuit by making contact.

シャフト4のレバー5が固定されているのと反対の側に
は、絞り弁3の開度を検出し電気信号としてli制御ユ
ニット13に情報を送る開度検出器14が設置されてい
る。この開度検出器14tよポテンショメータを内蔵し
両端子に印加する電L(に対する可動接点と1方の端子
間の分圧によって開度を検出する様にした所の公知のも
のである。
An opening detector 14 is installed on the opposite side of the shaft 4 to which the lever 5 is fixed. The opening detector 14 detects the opening of the throttle valve 3 and sends the information to the LI control unit 13 as an electric signal. This opening degree detector 14t is a known one that has a built-in potentiometer and detects the opening degree by the partial voltage between a movable contact and one terminal relative to the voltage L applied to both terminals.

I制御ユニット13には吸気管2の圧力を検出する圧力
センサ信号、ディストリビュータ16からの点火信号、
エンジンの冷却水温度を検出する水温センサ17さらに
絞り弁の開度検出器14、直流モータ6に内蔵の接点1
1.12の信号が入力されib制御ユニット13はこれ
らの入力信号に基き直流モータ6と絞り弁3の上流に設
けられた電磁式燃料噴射弁18を電気的に制御する。
The I control unit 13 includes a pressure sensor signal for detecting the pressure in the intake pipe 2, an ignition signal from the distributor 16,
A water temperature sensor 17 that detects the engine cooling water temperature, a throttle valve opening detector 14, and a contact 1 built into the DC motor 6.
1.12 signals are input, and the ib control unit 13 electrically controls the DC motor 6 and the electromagnetic fuel injection valve 18 provided upstream of the throttle valve 3 based on these input signals.

電磁式燃料の噴射弁18には燃料ポンプ(図示されてい
ない)から燃料がCからIモ送され燃料圧力は燃圧調整
器(図示されていない)により噴射弁18が装着されて
いる吸気管内圧力に対して設定された一定の圧力差を保
つ種制御される。
Fuel is fed from C to the electromagnetic fuel injection valve 18 from a fuel pump (not shown), and the fuel pressure is adjusted by a fuel pressure regulator (not shown) to the pressure inside the intake pipe to which the injection valve 18 is attached. Keeping a constant pressure difference set against the species controlled.

次に第2図に基き制御ユニット13の内部構成を説明す
る。
Next, the internal configuration of the control unit 13 will be explained based on FIG. 2.

マイクロコンピュータ(CPU)100.A−D変換1
1S101、入力インタフェイス102、出力インタフ
ェイス103、メモリ104がパスライン105により
図の様に接続されている。
Microcomputer (CPU) 100. A-D conversion 1
1S101, input interface 102, output interface 103, and memory 104 are connected by path line 105 as shown in the figure.

A−D変換器101には絞り弁開度検出器14、圧力セ
ンサ15、水温センサ17からのアナログ信号が入力さ
れ、あらかじめ定められた時間スケジュールに従って発
せられるCPU100の3の指令により逐次A−D変換
をおこなう。
Analog signals from the throttle valve opening detector 14, pressure sensor 15, and water temperature sensor 17 are input to the A-D converter 101, and the A-D converter 101 sequentially converts the A-D converter 101 according to commands 3 from the CPU 100 issued according to a predetermined time schedule. Perform the conversion.

入力インタフェイス102にはディストリビュータから
の点火信号および電気スイッチ19(すなわち電気接点
11.12の信号が人力され、点火信号はCPtJlo
oにより内蔵したカウンタにより点火間隙を計測しその
結果により回転信号を得ている。
The input interface 102 receives the ignition signal from the distributor and the signals of the electric switch 19 (i.e., the electric contacts 11.12), and the ignition signal is input from the CPtJlo
The ignition gap is measured by a built-in counter, and a rotation signal is obtained from the result.

メモリ104はcpuiooの制御プUグラム入力信号
に対する変換値等の情報が記憶されており、CPu10
0はメモリ104からυ1111プログラムを読み出し
これにもとづいて噴射弁18を励磁して燃料をおこなわ
しめるlll!$Jパルス巾と、直流モータ6を駆動す
るための駆動パルスの発生を演算@御する。その結果は
出力インタフェイス103に出力され、噴射パルス巾信
月は噴射弁駆動用のドライバ107で信号増幅されて噴
射弁に出力される。
The memory 104 stores information such as conversion values for CPU program input signals for the CPU 10.
0 reads out the υ1111 program from the memory 104 and excites the injection valve 18 based on it to inject fuel lll! Calculates and controls the $J pulse width and the generation of drive pulses for driving the DC motor 6. The result is output to the output interface 103, and the injection pulse width signal is amplified by a driver 107 for driving the injection valve and output to the injection valve.

また直流モータ6の駆動指令信号は直流モータ用のドラ
イバ106に出力される。10Bの内部は電磁弁を使っ
た等価回路で示したごとく正転指分信号、逆転指令信号
により直接モータ6にかかる両端子電圧をそれぞれに応
じて切換えて決められた1つのステップに相当する時間
、直流モータ6に′24源を供給し制御する。
Further, a drive command signal for the DC motor 6 is output to a DC motor driver 106. As shown in the equivalent circuit using a solenoid valve, inside 10B, the time corresponding to one step is determined by switching the voltage at both terminals directly applied to the motor 6 according to the forward rotation command signal and reverse rotation command signal. , supplies the '24 source to the DC motor 6 and controls it.

次に第3図0.0に示すフローチャートに基き作動を説
明する。
Next, the operation will be explained based on the flowchart shown in FIG. 30.0.

メインルーチンの処理はill Ifユニット13に電
源が投入されると起動処理200をおこない次に水温セ
ンサ信号、絞り弁開度信号により燃料噴射の増量の計算
をおこなうステップ201゜次に100−3経過したか
、ステップ202で確認し10QIS経過ごとに次の処
理をおこなう様にする。
The processing of the main routine is as follows: When the power is turned on to the ill If unit 13, a start-up process 200 is performed, followed by a step 201 in which an increase in fuel injection amount is calculated based on the water temperature sensor signal and the throttle valve opening signal, followed by a step 100-3. It is checked in step 202 whether or not the QIS has passed, and the next process is performed every 10 QIS.

10013経過していた場合、ステップ203に進み絞
り弁アイドル時開度の目標値V。と回転速度の閉ループ
制御の目標値N。を水温センサ信号に応じて計算する。
If 10013 times have elapsed, the process advances to step 203 and the target value V of the throttle valve idling opening degree is determined. and target value N for closed-loop control of rotational speed. is calculated according to the water temperature sensor signal.

次にステップ204で電気スイッチ19がON(閉〉か
判別し、ONならばステップ205にてその時点での絞
り弁開度Vを検出し、RAMに記憶する。ステップ20
6〜207であらかじめ設定されたアイドル条件かどう
かを判別し、2つの判別条件をすべて満たす時ステップ
208〜210で回転速度の閉ループ制御をおこなう。
Next, in step 204, it is determined whether the electric switch 19 is ON (closed), and if it is ON, in step 205, the throttle valve opening degree V at that time is detected and stored in the RAM.Step 20
In steps 6 to 207, it is determined whether or not a preset idle condition is met, and when both of the two determination conditions are satisfied, closed loop control of the rotational speed is performed in steps 208 to 210.

設定したアイドル条件でない時にはステップ212で絞
り弁開度■が目標とする絞り弁全開位置■ にあるか判
別し、■〉Voの時には直流モー〇 り6を1ステツプ逆転さ已〔絞り弁3を全閉の方向へ移
動させる。■≦■。の時には、直流上−タ6を1ステツ
プ正転させて絞り弁を開く方向に移動させる。
When the idle condition is not set, it is determined in step 212 whether the throttle valve opening degree ■ is at the target throttle valve fully open position ■, and when ■〉Vo, the DC motor 6 is reversed by one step. Move it in the direction of fully closed. ■≦■. At this time, the DC converter 6 is rotated forward by one step to move the throttle valve in the direction of opening.

他方、電気スイッチ19が開いている時、すなわち運転
者によってアクセルが踏まれ絞り弁3が全開から離れて
開いており車両が走行している時にはステップ214に
進み、さらに回転速度Nが閉ループ1bl11!llの
目標回転速度N0よりも高い設定(ie1No+ΔNよ
り高いかどうか判別し、高い時にはダッシュポット効果
を得るためにステップ215で全開位置目標値■ をV
  +V1に変更する。
On the other hand, when the electric switch 19 is open, that is, when the driver depresses the accelerator and the throttle valve 3 is opened away from the fully open position and the vehicle is running, the process proceeds to step 214, and the rotational speed N is closed loop 1bl11! It is determined whether the setting is higher than the target rotational speed N0 of ll (ie1No+ΔN), and if it is higher, the full open position target value ■ is set to V in step 215 in order to obtain a dashpot effect.
Change to +V1.

O しかる後、ステップ216に進み、V>Voの時には直
流モータ6を1ステツプ逆転させ(ステップ217)、
それと同時にステップ205によりRAMに記憶してい
る絞り弁全開位置を直流モータ6で1ステツプ逆転させ
た橡に見合う分(ΔV  )を修正する(ステップ21
8〉。
O After that, the process proceeds to step 216, and when V>Vo, the DC motor 6 is reversed by one step (step 217).
At the same time, in step 205, the fully open position of the throttle valve stored in the RAM is corrected by an amount (ΔV) corresponding to the value obtained by reversing the throttle valve fully open position by one step using the DC motor 6 (step 21
8〉.

TEP ■≦■oの時は、直流モータ6を1ステツプ正転させ(
ステップ219)ステップ220でステップ218と同
様に逆方向に修正をおこなう。
TEP When ■≦■o, the DC motor 6 is rotated one step forward (
Step 219) In step 220, corrections are made in the opposite direction as in step 218.

以上説明したメインルーチンの動作はくり返し実行され
る。また入力インタフェイス102に点火信号が入ると
、それに同期して入力インタフェイス102はCPU 
100に割込信号を送りCPtJlooはその信号に基
いてすぐさま第4図に示す割込処理をおこなう。すなわ
ち、ステップ221で圧力センサ信号と点火信号から求
まる回転信号に応じて噴射パルス巾を演算決定し、ステ
ップ222で求めた噴射時間を出力レジスタにセットし
メインルーチンに復帰する。出力レジスタにセットされ
た噴射時間に基き噴射パルス巾は形成されI!ii11
mli1弁に出力される。
The operations of the main routine described above are executed repeatedly. Further, when an ignition signal is input to the input interface 102, the input interface 102 synchronizes with the ignition signal to the CPU.
100, and CPtJloo immediately performs the interrupt processing shown in FIG. 4 based on the signal. That is, in step 221, the injection pulse width is calculated and determined according to the rotation signal obtained from the pressure sensor signal and the ignition signal, and in step 222, the injection time obtained is set in the output register, and the process returns to the main routine. The injection pulse width is formed based on the injection time set in the output register and I! ii11
Output to mli1 valve.

本実施例ではアクチュエータとして直流モータをもちい
たがステップモータまたは比例電磁弁または吸気負圧を
利用した明−ボモータまた油圧、燃圧を利用したナーボ
モータをもちいても同様の効果が得られる。
In this embodiment, a DC motor is used as the actuator, but the same effect can be obtained by using a step motor, a proportional solenoid valve, a light motor that uses intake negative pressure, or a nervous motor that uses oil pressure or fuel pressure.

また本実施例では絞り弁の上流から燃料噴射をおこなう
ものと組合せて示したが燃料供給装置がキャブレターや
各気筒ごとに噴射弁を備えた燃料噴射装置と組合せても
同様の効果が得られる。
Further, in this embodiment, the fuel injection device is shown in combination with one in which fuel is injected from upstream of the throttle valve, but the same effect can be obtained even if the fuel supply device is combined with a carburetor or a fuel injection device having an injection valve for each cylinder.

(発明の効果) 上述のように、本発明は、 吸気管に設けられた絞り弁と、 該絞り弁の開度を変える作動器と、 前記絞り弁の開度を検出する開度検出器と、エンジンの
回転速度を検出する回転数検出手段と、 前記絞り弁がアイドル位置にあることを検出するアイド
ル検出器と、 前記開度検出器、前記アイドル検出器、及び前記回転速
度検出器からの信号に基づいて前記作動器を制御する制
御器と有するエンジンのアイドル回転速度側@装置であ
って、 前記tIIIIl器は、 あらかじめ設定された目標速度と前記回転速度検出器よ
り得られた回転速度とを比較して、前記回転速度が前記
目標速度となるように前記作動器をtlllwJする回
転速度il制御手段と、あらかじめ設定された目標開度
と前記1lfla検出器より得られた絞り弁開度ζを比
較して、前記絞り弁開度が前記目標速度となるように前
記作動器をυ制御する絞り弁lli度i制御手段と、前
記エンジンが安定したアイドル運転状態にあるか否かを
判定し、 tiJ記アイドル検出器にて検出されたアイドル状態に
あり、かつ前記エンジンが安定したアイドル運転状態で
あると判定した時は前記回転速度制御手段の出力を、 また前記アイドル検出器で検出されたアイドル状態であ
っても、前記エンジンが安定したアイドル運転状態でな
い過渡状態であると判定した時には前記絞り弁開度l1
jtl1手段の出力をそれぞれ選択する選択手段と、 前記選択手段の出力により前記作動器をアクチュエータ
を駆動するドライバとを備えたエンジンの回転速r!1
制御装訳としたことから、エンジン作動状態により、回
転速度側tIlεスロットル弁開度!IJ Iを選択す
ることにより、例えば回転速度が安定〈水温75℃以上
と回転変動中の両方の条件を満足〉したアイドル運転状
態では精度良くアイドル回転速度をυ1wJでき、かつ
回転速度が非安定状態では追従性、応答性良く、アイド
ル回転速度をt、II tillできるという作用効果
がある。
(Effects of the Invention) As described above, the present invention includes: a throttle valve provided in an intake pipe; an actuator that changes the opening degree of the throttle valve; and an opening detector that detects the opening degree of the throttle valve. , a rotation speed detection means for detecting the rotation speed of the engine; an idle detector for detecting that the throttle valve is in the idle position; and a rotation speed detection means for detecting the rotation speed of the engine; An engine idle rotation speed side @ device having a controller that controls the actuator based on a signal, wherein the tIII device has a preset target speed and a rotation speed obtained from the rotation speed detector. a rotational speed il control means for controlling the actuator so that the rotational speed becomes the target speed, and a throttle valve opening ζ obtained from a preset target opening and the 1lfla detector. a throttle valve lli degree i control means for controlling the actuator so that the throttle valve opening degree becomes the target speed, and determines whether or not the engine is in a stable idle operating state. , when the engine is in the idle state detected by the idle detector, and it is determined that the engine is in a stable idle operating state, the output of the rotational speed control means, and the engine is in the idle state detected by the idle detector. Even if the engine is in an idling state, when it is determined that the engine is not in a stable idling state but in a transient state, the throttle valve opening l1
jtl1 means, and a driver for driving the actuator according to the output of the selection means. 1
Since it is a control system, depending on the engine operating condition, the rotation speed side tIlε throttle valve opening! By selecting IJ I, for example, in an idling operating state where the rotational speed is stable (both the conditions of water temperature 75°C or higher and rotation fluctuation being satisfied), the idle rotational speed can be accurately set to υ1wJ, and the rotational speed is unstable. This has the advantage of good followability and responsiveness, and the ability to reduce the idle rotation speed to t, II till.

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

第1図は本発明の一実施例の全体の構成を示す構成図、 第2図は制御ユニットの内部の構成を説明するブロック
図、 第3図(2)、0はi[ユニット内のマイクロコンピュ
ータの処理手順を示すフローチャート、および 第4図は制御ユニット内のマイクロコンピュータの処理
手順のうち点火割込処理内容を示すフローチャートであ
る。 3・・・絞り弁 6・・・直流モータ 13・−all
 ’mユニット 14・・・開度検出器 19・・・電
気スイッチ。
FIG. 1 is a block diagram showing the overall configuration of an embodiment of the present invention. FIG. 2 is a block diagram explaining the internal configuration of the control unit. FIG. 4 is a flowchart showing the processing procedure of the computer, and FIG. 4 is a flowchart showing the contents of the ignition interrupt processing among the processing steps of the microcomputer in the control unit. 3... Throttle valve 6... DC motor 13.-all
'm unit 14...Opening degree detector 19...Electric switch.

Claims (1)

【特許請求の範囲】 吸気管に設けられた絞り弁と、 該絞り弁の開度を変える作動器と、 前記絞り弁の開度を検出する開度検出器と、エンジンの
回転速度を検出する回転数検出手段と、 前記絞り弁がアイドル位置にあることを検出するアイド
ル検出器と、 前記開度検出器、前記アイドル検出器、及び前記回転速
度検出器からの信号に基づいて前記作動器を制御する制
御器と有するエンジンのアイドル回転速度制御装置であ
って、 前記制御器は、 あらかじめ設定された目標速度と前記回転速度検出器よ
り得られた回転速度とを比較して、前記回転速度が前記
目標速度となるように前記作動器を制御する回転速度制
御手段と、あらかじめ設定された目標開度と前記開度検
出器より得られた絞り弁開度とを比較して、前記絞り弁
開度が前記目標速度となるように前記作動器を制御する
絞り弁開度制御手段と、 前記エンジンが安定したアイドル運転状態にあるか否か
を判定し、 前記アイドル検出器にて検出されたアイドル状態にあり
、かつ前記エンジンが安定したアイドル運転状態である
と判定した時は前記回転速度制御手段の出力を、 また前記アイドル検出器で検出されたアイドル状態であ
っても、前記エンジンが安定したアイドル運転状態でな
い過渡状態であると判定した時には前記絞り弁開度制御
手段の出力をそれぞれ選択する選択手段と、 前記選択手段の出力により前記作動器をアクチュエータ
を駆動するドライバとを備えたエンジンの回転速度制御
装置。
[Scope of Claims] A throttle valve provided in an intake pipe, an actuator that changes the opening degree of the throttle valve, an opening detector that detects the opening degree of the throttle valve, and an opening degree detector that detects the rotational speed of the engine. rotational speed detection means; an idle detector that detects that the throttle valve is in an idle position; and an idle detector that operates the actuator based on signals from the opening degree detector, the idle detector, and the rotational speed detector. An engine idle rotation speed control device comprising a controller for controlling an engine, wherein the controller compares a preset target speed with a rotation speed obtained from the rotation speed detector to determine whether the rotation speed is A rotational speed control means for controlling the actuator to achieve the target speed compares a preset target opening degree with the throttle valve opening obtained from the opening detector, and determines the throttle valve opening. throttle valve opening control means for controlling the actuator so that the engine speed reaches the target speed; and determining whether or not the engine is in a stable idle operating state; and when it is determined that the engine is in a stable idling state, the output of the rotational speed control means is controlled; An engine comprising a selection means for selecting an output of the throttle valve opening control means when it is determined that the operating state is not an idling state but a transient state, and a driver for driving the actuator of the actuator based on the output of the selection means. Rotation speed control device.
JP20655890A 1990-08-03 1990-08-03 Engine speed controlling device Granted JPH0374541A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP20655890A JPH0374541A (en) 1990-08-03 1990-08-03 Engine speed controlling device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP20655890A JPH0374541A (en) 1990-08-03 1990-08-03 Engine speed controlling device

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
JP1538281A Division JPS57129233A (en) 1981-02-04 1981-02-04 Device for controlling rotational speed of engine

Publications (2)

Publication Number Publication Date
JPH0374541A true JPH0374541A (en) 1991-03-29
JPH0578664B2 JPH0578664B2 (en) 1993-10-29

Family

ID=16525384

Family Applications (1)

Application Number Title Priority Date Filing Date
JP20655890A Granted JPH0374541A (en) 1990-08-03 1990-08-03 Engine speed controlling device

Country Status (1)

Country Link
JP (1) JPH0374541A (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55148938A (en) * 1979-05-11 1980-11-19 Hitachi Ltd Controller of idling revolution
JPS5696125A (en) * 1979-12-28 1981-08-04 Hitachi Ltd Rotary speed controller for engine

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55148938A (en) * 1979-05-11 1980-11-19 Hitachi Ltd Controller of idling revolution
JPS5696125A (en) * 1979-12-28 1981-08-04 Hitachi Ltd Rotary speed controller for engine

Also Published As

Publication number Publication date
JPH0578664B2 (en) 1993-10-29

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