JPH05195851A - Ignition timing control device for internal combustion engine - Google Patents

Ignition timing control device for internal combustion engine

Info

Publication number
JPH05195851A
JPH05195851A JP695192A JP695192A JPH05195851A JP H05195851 A JPH05195851 A JP H05195851A JP 695192 A JP695192 A JP 695192A JP 695192 A JP695192 A JP 695192A JP H05195851 A JPH05195851 A JP H05195851A
Authority
JP
Japan
Prior art keywords
ignition timing
fuel ratio
air
control
internal combustion
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
Application number
JP695192A
Other languages
Japanese (ja)
Inventor
Tsuyoshi Sodeno
強 袖野
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.)
Nissan Motor Co Ltd
Original Assignee
Nissan Motor 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 Nissan Motor Co Ltd filed Critical Nissan Motor Co Ltd
Priority to JP695192A priority Critical patent/JPH05195851A/en
Publication of JPH05195851A publication Critical patent/JPH05195851A/en
Pending legal-status Critical Current

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

Abstract

PURPOSE:To restrain generation of knocking and deterioration of operability due to ignition timing control at changeover of air-fuel ratio control in an internal combustion engine. CONSTITUTION:Ignition timing ADV0 is retrieved by searching an ignition timing map in which ignition timing is previously memorized according to the detected value of engine speed and load (S11), after transferring from a feedback control territory for target air-fuel ratio (theoretical air-fuel ratio) to an output air-fuel ratio territory, whether it is in a prescribed delay term to continue the feedback control or not is judged (S12), and if it is not in the delay term it is controlled to be the searched ignition timing ADV0, but if it is in the delay term it is controlled to be ignition timing ADV which is the searched ignition timing ADV0 corrected to delay by a decided quantity RTD0 (S13, S15). Generation of knocking and deterioration of operability due to control of spark-advance can be restrained.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は、内燃機関の点火時期制
御装置に関し、特に空燃比制御の切換時における点火時
期制御に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ignition timing control device for an internal combustion engine, and more particularly to ignition timing control when switching air-fuel ratio control.

【0002】[0002]

【従来の技術】従来、内燃機関の空燃比の制御は所定の
低中負荷領域では所定空燃比 (一般には理論空燃比) に
フィードバック制御し、加速時等の高負荷領域では前記
所定空燃比より濃化された出力優先の出力空燃比にフィ
ードフォワード制御している (特開昭62−10185
5号等参照) 。また、前記空燃比のフィードバック制御
領域からフィードフォワード制御領域への移行する際に
運転状態がこれら領域の境界近傍でハンチングして空燃
比が変動を繰り返すことを防止するため、フィードフォ
ワード制御領域へ移行してから所定のディレイ期間はフ
ィードフォワード制御を開始せず、フィードバック制御
を継続するようにしたものがある。
2. Description of the Related Art Conventionally, the control of the air-fuel ratio of an internal combustion engine is performed by feedback control to a predetermined air-fuel ratio (generally the theoretical air-fuel ratio) in a predetermined low and medium load range, and from the predetermined air-fuel ratio in a high load range such as during acceleration. The feed-forward control is performed to the output air-fuel ratio with the concentrated output priority (Japanese Patent Laid-Open No. 62-10185).
(See No. 5). Further, in order to prevent the operating state from hunting near the boundary of these regions and repeating the fluctuation of the air-fuel ratio when shifting from the air-fuel ratio feedback control region to the feed-forward control region, shift to the feed-forward control region. Then, there is a system in which the feedforward control is not started for a predetermined delay period and the feedback control is continued.

【0003】一方、内燃機関の点火時期は、機関の回転
速度及び負荷に応じて予め点火時期を記憶したマップを
用意し、該マップから検索した点火時期に基づいて設定
された点火時期に制御している。
On the other hand, for the ignition timing of the internal combustion engine, a map in which the ignition timing is stored in advance is prepared according to the rotational speed and load of the engine, and the ignition timing is controlled based on the ignition timing retrieved from the map. ing.

【0004】[0004]

【発明が解決しようとする課題】しかしながら、上記の
ように空燃比の制御の切換にディレイを持たせるものに
おいて、前記通常の点火時期制御を行う場合、該ディレ
イ期間中は空燃比は所定空燃比にフィードバック制御さ
れたままであるのに、点火時期については高負荷領域に
応じて出力を高めるべく進角補正された点火時期に制御
されてしまうためノッキングを発生したり運転性が悪化
したりする傾向があった。
However, in the case where the switching of the air-fuel ratio control is delayed as described above, when the normal ignition timing control is performed, the air-fuel ratio is the predetermined air-fuel ratio during the delay period. However, the ignition timing is controlled to the ignition timing corrected in advance in order to increase the output according to the high load region, but knocking may occur or the drivability may deteriorate. was there.

【0005】本発明は、このような従来の問題点に鑑み
なされたもので、空燃比制御に見合った点火時期制御を
行うことにより上記問題点を解決した内燃機関の点火時
期制御装置を提供することを目的とする。
The present invention has been made in view of such conventional problems, and provides an ignition timing control device for an internal combustion engine, which solves the above problems by performing ignition timing control commensurate with air-fuel ratio control. The purpose is to

【0006】[0006]

【課題を解決するための手段】このため本発明は、空燃
比フィードバック制御手段によって空燃比を所定空燃比
にフィードバック制御する運転領域から、出力空燃比制
御手段によって前記所定空燃比より濃化された出力空燃
比にフィードフォワード制御する運転領域に移行する際
に前記出力空燃比への制御を所定のディレイ期間遅らせ
る空燃比制御ディレイ手段を備えた内燃機関に備えら
れ、運転状態に応じた点火時期を記憶した点火時期記憶
手段と、運転状態検出手段により検出された機関の運転
状態に応じて前記点火時期記憶手段から検索した点火時
期に基づいて点火時期を制御する点火時期制御手段とを
含んで構成された点火時期制御装置において、前記空燃
比制御ディレイ手段により出力空燃比への制御を遅らせ
ているディレイ期間中は前記点火時期記憶手段から検索
された点火時期を所定量遅角側に補正し、前記点火時期
制御手段によって該遅角補正された点火時期に制御させ
る遅角補正手段を設けた構成とした。
Therefore, according to the present invention, the output air-fuel ratio control means enriches the predetermined air-fuel ratio from the operation range in which the air-fuel ratio feedback control means feedback-controls the air-fuel ratio to the predetermined air-fuel ratio. The internal combustion engine is provided with an air-fuel ratio control delay means that delays the control to the output air-fuel ratio by a predetermined delay period when shifting to the operating region where the feed-forward control is performed on the output air-fuel ratio, and sets the ignition timing according to the operating state. And an ignition timing control means for controlling the ignition timing based on the ignition timing retrieved from the ignition timing storage means according to the operating state of the engine detected by the operating state detection means. In the ignition timing control device, the delay period in which the control to the output air-fuel ratio is delayed by the air-fuel ratio control delay means Was constructed in which a retard correction means for controlling the ignition timing retrieved from the ignition timing storing means is corrected to a predetermined amount retard side, the ignition timing is slow-angle corrected by said ignition timing control means.

【0007】[0007]

【作用】空燃比が所定空燃比にフィードバック制御され
る領域から出力空燃比にフィードフォワード制御される
領域に移行すると、移行後所定のディレイ期間は空燃比
は所定空燃比のフィードバック制御が継続される。この
ディレイ期間中は、点火時期記憶手段から運転状態に応
じて検索された点火時期が遅角補正手段によって所定量
遅角補正され、該補正された点火時期に制御されるため
点火時期が領域の変化によって進角されることによるノ
ッキングの発生や運転性の悪化が回避される。
When the air-fuel ratio shifts from the region where the air-fuel ratio is feedback controlled to the predetermined air-fuel ratio to the region where the feed-forward control is performed to the output air-fuel ratio, the feedback control of the predetermined air-fuel ratio is continued for the air-fuel ratio during the predetermined delay period after the shift. .. During this delay period, the ignition timing retrieved from the ignition timing storage means according to the operating state is retarded by the retard correction means by a predetermined amount, and the corrected ignition timing is controlled to the corrected ignition timing. Occurrence of knocking and deterioration of drivability due to advancement due to changes are avoided.

【0008】[0008]

【実施例】以下に、本発明の実施例を図面に基づいて説
明する。一実施例の構成を示す図2において、内燃機関
1には、エアクリーナ2,吸気ダクト3,スロットルチ
ャンバ4及び吸気マニホールド5を介して空気が吸入さ
れる。吸気ダクト3には、エアフローメータ6が設けら
れ、スロトルチャンバ4には図示しないアクセルペダル
と連動するスロットル弁7が設けられていて、吸入空気
流量Qを制御する。吸気マニホールド5には、各気筒毎
に電磁式の燃料噴射弁8が設けられていて、図示しない
燃料ポンプから圧送されプレッシャレギュレータにより
所定の圧力に制御される燃料を吸気マニホールド5に噴
射供給する。また、排気通路9には機関に供給される混
合気の空燃比を排気中の酸素濃度の検出により検出する
2 センサ10が介装されている。
Embodiments of the present invention will be described below with reference to the drawings. In FIG. 2 showing the configuration of one embodiment, air is taken into the internal combustion engine 1 through an air cleaner 2, an intake duct 3, a throttle chamber 4 and an intake manifold 5. The intake duct 3 is provided with an air flow meter 6, and the throttle chamber 4 is provided with a throttle valve 7 interlocked with an accelerator pedal (not shown) to control the intake air flow rate Q. The intake manifold 5 is provided with an electromagnetic fuel injection valve 8 for each cylinder, and injects fuel into the intake manifold 5 which is pressure-fed from a fuel pump (not shown) and is controlled to a predetermined pressure by a pressure regulator. Further, an O 2 sensor 10 for detecting the air-fuel ratio of the air-fuel mixture supplied to the engine by detecting the oxygen concentration in the exhaust gas is interposed in the exhaust passage 9.

【0009】燃料噴射量の制御は、マイクロコンピュー
タ内蔵のコントロールユニット11において、図3に示す
フローチャートに従って行われる。エアフローメータ6
により検出される吸入空気流量Qと、ディストリビュー
タ12に内蔵されたクランク角センサ13からの信号に基づ
き算出される機関回転速度Nとから基本燃料噴射量T P
を演算する (ステップ1,図ではSと記す) 。この基本
燃料噴射量TP を冷却水温度等によって補正すべく設定
された各種補正係数COEFやバッテリ電圧による無効
噴射分TS を入力し (ステップ2,3) 、機関回転速度
Nと基本燃料噴射量TP とに基づいて運転領域を判別し
(ステップ4) 、所定の低中負荷領域では前記O2 セン
サ10により検出された空燃比に基づいて空燃比を理論空
燃比に近づけるように設定されたフィードバック補正係
数αを入力する (ステップ5) 。また、加速等の高出力
を要する高負荷領域と判定された場合は、前記フィード
バック補正係数αによる空燃比フィードバック制御を行
う領域から当該高負荷領域に移行してから所定のディレ
イ期間中であるかを判別し (ステップ6) 、ディレイ期
間中である場合は前記フィードバック補正係数αによる
補正を継続し (ステップ5) 、ディレイ期間経過後は理
論空燃比より濃化された出力空燃比を得るべく燃料増量
補正係数KMRを入力し (ステップ7) 、夫々の運転領
域毎に最終的な燃料噴射量TI を演算し (ステップ8,
9) 、この燃料噴射量TI に相当するパルス幅の駆動パ
ルス信号を機関回転に同期して燃料噴射弁8に出力する
ことにより、機関1に対して要求量の燃料が噴射供給さ
れるようになっている (ステップ10) 。尚、前記空燃比
制御でステップ1〜5, , 10の機能が空燃比フィード
バック制御手段を構成し、ステップ1〜4, , , 10
の機能が出力空燃比制御手段を構成し、ステップ6→ス
テップ5の機能が空燃比制御ディレイ手段を構成する。
また、エアフローメータ6やクランク角センサ13等は運
転状態検出手段を構成する。
The control of the fuel injection amount is performed by a microcomputer.
Fig. 3 shows the control unit 11 with built-in controller
It is performed according to the flowchart. Air flow meter 6
Intake air flow rate Q detected by
Based on the signal from the crank angle sensor 13 built in the
Based on the calculated engine speed N and the basic fuel injection amount T P
Is calculated (step 1, denoted as S in the figure). This basic
Fuel injection amount TPIs set to be corrected by the cooling water temperature, etc.
Invalid by various correction factors COEF and battery voltage
Injection amount TSEnter (Steps 2 and 3) and the engine speed
N and basic fuel injection amount TPThe operating area is determined based on
 (Step 4), in the predetermined low and medium load region, the O2Sen
The theoretical air-fuel ratio based on the air-fuel ratio detected by
Feedback correction section set to approach the fuel ratio
Input the number α (step 5). Also, high output such as acceleration
If it is determined that the high load area requires
Performs air-fuel ratio feedback control using the back correction coefficient α
After shifting to the high load area from the
(A) Determine if it is in the period (step 6), delay period
If it is in the middle, the feedback correction coefficient α
Continue the correction (step 5), and after the delay period,
Fuel increase to obtain a richer output air-fuel ratio than the theoretical air-fuel ratio
Input the correction coefficient KMR (step 7),
Final fuel injection amount T for each regionIIs calculated (step 8,
9), this fuel injection amount TIDrive pulse width equivalent to
The loose signal is output to the fuel injection valve 8 in synchronization with the engine rotation.
As a result, the required amount of fuel is injected and supplied to the engine 1.
(Step 10). The air-fuel ratio
Steps 1-5 by control,8,10 functions air-fuel ratio feed
Steps 1 to 4 which constitute the back control means,7,9,Ten
Function constitutes output air-fuel ratio control means, and step 6 →
The function of the step 5 constitutes an air-fuel ratio control delay means.
In addition, the air flow meter 6 and crank angle sensor 13 etc.
It constitutes a rotation state detecting means.

【0010】また、機関1の各気筒には夫々点火栓14が
設けられていて、これらには、点火コイル15にて発生す
る電圧がディストリビュータ16を介して常時印加され、
これにより、火花点火して混合気を着火燃焼させる。こ
こで、点火コイル15は、付設されたパワートランジスタ
15aを介して高電圧の発生時期が制御されるようになっ
ている。したがって点火時期(点火進角値)ADVの制
御は、前記パワートランジスタ15aのOFF時期をコン
トロールユニット11により図4に示すフローチャートに
従って制御することにより行う。
Further, each cylinder of the engine 1 is provided with a spark plug 14, to which a voltage generated in an ignition coil 15 is constantly applied via a distributor 16,
This causes spark ignition to ignite and burn the air-fuel mixture. Here, the ignition coil 15 is an attached power transistor.
The generation timing of the high voltage is controlled via 15a. Therefore, the ignition timing (ignition advance value) ADV is controlled by controlling the OFF timing of the power transistor 15a by the control unit 11 according to the flowchart shown in FIG.

【0011】即ち、コントロールユニット11は、前記基
本燃料噴射量TP と機関回転速度Nとにより区分される
複数の運転領域毎にROMに記憶してあるマップ (該R
OMのマップが点火時期記憶手段を構成する) から、当
該運転状態に対応する点火時期ADV0を検索した後 (ステ
ップ11) 、前記空燃比制御切換時のディレイ期間中か否
かを判定し (ステップ12) 、ディレイ期間中でない場合
は、前記検索した点火時期ADV0に一致するように点火信
号ADV を出力して点火時期時期を制御する (ステップ1
3,15) 。尚、図示及び説明を省略するが、特にノッキ
ングを発生し易い領域では図示しないノックセンサを用
いて前記マップからの検索による点火時期ADV0をフィー
ドバック補正して所定のノッキングレベルを維持するよ
うに制御する。前記ディレイ期間中と判定された場合
は、前記マップから検索した点火時期ADV0を所定量RTD0
だけ遅角補正した点火時期に基づいて点火時期を制御す
る (ステップ14,15) 。ここで、ステップ11,13,15の
機能が点火時期制御手段を構成し、ステップ12,14の機
能が遅角補正手段を構成する。
That is, the control unit 11 stores a map stored in the ROM for each of a plurality of operating regions divided by the basic fuel injection amount T P and the engine speed N (the R
After the ignition timing ADV 0 corresponding to the operating state is searched from the map of the OM constitutes the ignition timing storage means) (step 11), it is determined whether or not the delay period at the time of switching the air-fuel ratio control is ( If the delay period is not in progress, the ignition signal ADV is output so as to match the retrieved ignition timing ADV 0 to control the ignition timing (step 1).
3, 15). Although illustration and description are omitted, particularly in an area where knocking is likely to occur, a knock sensor (not shown) is used to perform feedback correction of the ignition timing ADV 0 based on a search from the map to control to maintain a predetermined knocking level. To do. If it is determined that the delay period is in progress, the ignition timing ADV 0 retrieved from the map is set to a predetermined amount RTD 0.
The ignition timing is controlled based on the ignition timing corrected only by the retard angle (steps 14 and 15). Here, the functions of steps 11, 13, and 15 constitute ignition timing control means, and the functions of steps 12 and 14 constitute retard correction means.

【0012】かかる構成とすれば、出力空燃比領域へ移
行してから空燃比のフィードバック制御が継続するディ
レイ期間中は、点火時期を運転領域で定めた値から所定
量遅角補正した値に基づいて制御するようにしたため、
高負荷領域への移行に伴う点火時期の進角によるノッキ
ング発生や運転性の悪化を良好に回避することができ
る。
With such a configuration, during the delay period in which the feedback control of the air-fuel ratio continues after shifting to the output air-fuel ratio region, the ignition timing is based on the value obtained by correcting the ignition timing by a predetermined amount from the value determined in the operating region. Since it was controlled by
It is possible to favorably avoid the occurrence of knocking and the deterioration of drivability due to the advance of the ignition timing due to the shift to the high load region.

【0013】尚、本実施例では、該ディレイ期間中の点
火時期の遅角補正量は一定としたが運転領域に応じて可
変に設定するようにしてもよい。
In this embodiment, the ignition timing retard correction amount during the delay period is constant, but it may be set variably according to the operating region.

【0014】[0014]

【発明の効果】以上説明してきたように、本発明によれ
ば空燃比のフィードバック制御領域から出力空燃比のフ
ィードフォワード領域への移行時に空燃比フィードバッ
ク制御を継続するディレイ期間中は点火時期を運転状態
に基づいて決定された点火時期の検索値を所定量遅角補
正して制御する構成としたため、出力空燃比領域で検索
された進角側の点火時期制御によるノッキングの発生や
運転性の悪化を良好に抑制できる。
As described above, according to the present invention, the ignition timing is operated during the delay period in which the air-fuel ratio feedback control is continued at the time of shifting from the air-fuel ratio feedback control region to the output air-fuel ratio feed-forward region. Since the ignition timing search value determined based on the state is retarded by a predetermined amount and controlled, knocking and deterioration of drivability due to ignition side ignition timing control searched in the output air-fuel ratio region are performed. Can be suppressed well.

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

【図1】本発明の構成,機能を示すブロック図FIG. 1 is a block diagram showing the configuration and functions of the present invention.

【図2】本発明の一実施例のシステム構成を示す図FIG. 2 is a diagram showing a system configuration of an embodiment of the present invention.

【図3】同上実施例の空燃比制御ルーチンを示すフロー
チャート
FIG. 3 is a flowchart showing an air-fuel ratio control routine of the above embodiment.

【図4】同上実施例の点火時期制御ルーチンを示すフロ
ーチャート
FIG. 4 is a flowchart showing an ignition timing control routine of the above embodiment.

【符号の説明】[Explanation of symbols]

1 内燃機関 6 エアフローメータ 8 燃料噴射弁 10 O2 センサ 11 コントロールユニット 13 クランク角センサ 14 点火栓1 Internal Combustion Engine 6 Air Flow Meter 8 Fuel Injection Valve 10 O 2 Sensor 11 Control Unit 13 Crank Angle Sensor 14 Spark Plug

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】空燃比フィードバック制御手段によって空
燃比を所定空燃比にフィードバック制御する運転領域か
ら、出力空燃比制御手段によって前記所定空燃比より濃
化された出力空燃比にフィードフォワード制御する運転
領域に移行する際に前記出力空燃比への制御を所定のデ
ィレイ期間遅らせる空燃比制御ディレイ手段を備えた内
燃機関に備えられ、運転状態に応じた点火時期を記憶し
た点火時期記憶手段と、運転状態検出手段により検出さ
れた機関の運転状態に応じて前記点火時期記憶手段から
検索した点火時期に基づいて点火時期を制御する点火時
期制御手段とを含んで構成された点火時期制御装置にお
いて、前記空燃比制御ディレイ手段により出力空燃比へ
の制御を遅らせているディレイ期間中は前記点火時期記
憶手段から検索された点火時期を所定量遅角側に補正
し、前記点火時期制御手段によって該遅角補正された点
火時期に制御させる遅角補正手段を設けたことを特徴と
する内燃機関の点火時期制御装置。
1. An operating range in which the air-fuel ratio feedback control means feedback-controls the air-fuel ratio to a predetermined air-fuel ratio, and an output range in which the output air-fuel ratio control means performs feed-forward control to an output air-fuel ratio enriched from the predetermined air-fuel ratio. Ignition timing storage means for storing the ignition timing according to the operating state, which is provided in the internal combustion engine equipped with the air-fuel ratio control delay means for delaying the control to the output air-fuel ratio when shifting to An ignition timing control device configured to include an ignition timing control means for controlling an ignition timing based on an ignition timing retrieved from the ignition timing storage means according to an operating state of an engine detected by a detection means, During the delay period in which the control to the output air-fuel ratio is delayed by the fuel ratio control delay means, it is retrieved from the ignition timing storage means. Ignition timing was corrected to a predetermined amount retard side, the ignition timing control apparatus for an internal combustion engine, characterized in that a retard correction means for controlling the ignition timing, which is slow-angle corrected by said ignition timing control means.
JP695192A 1992-01-17 1992-01-17 Ignition timing control device for internal combustion engine Pending JPH05195851A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP695192A JPH05195851A (en) 1992-01-17 1992-01-17 Ignition timing control device for internal combustion engine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP695192A JPH05195851A (en) 1992-01-17 1992-01-17 Ignition timing control device for internal combustion engine

Publications (1)

Publication Number Publication Date
JPH05195851A true JPH05195851A (en) 1993-08-03

Family

ID=11652539

Family Applications (1)

Application Number Title Priority Date Filing Date
JP695192A Pending JPH05195851A (en) 1992-01-17 1992-01-17 Ignition timing control device for internal combustion engine

Country Status (1)

Country Link
JP (1) JPH05195851A (en)

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