JPS61187545A - Air-fuel ratio controller for car engine - Google Patents

Air-fuel ratio controller for car engine

Info

Publication number
JPS61187545A
JPS61187545A JP2800685A JP2800685A JPS61187545A JP S61187545 A JPS61187545 A JP S61187545A JP 2800685 A JP2800685 A JP 2800685A JP 2800685 A JP2800685 A JP 2800685A JP S61187545 A JPS61187545 A JP S61187545A
Authority
JP
Japan
Prior art keywords
air
fuel ratio
engine
throttle valve
state
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
JP2800685A
Other languages
Japanese (ja)
Other versions
JPH0621594B2 (en
Inventor
Kazuhiro Shiraishi
白石 一洋
Hirohiko Iwamoto
裕彦 岩本
Takeo Kume
久米 建夫
Shogo Omori
祥吾 大森
Kiyoshi Hatano
清 波多野
Makoto Shimada
誠 島田
Yoshihiro Konno
紺野 義博
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.)
Mitsubishi Motors Corp
Original Assignee
Mitsubishi Motors 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 Mitsubishi Motors Corp filed Critical Mitsubishi Motors Corp
Priority to JP60028006A priority Critical patent/JPH0621594B2/en
Publication of JPS61187545A publication Critical patent/JPS61187545A/en
Publication of JPH0621594B2 publication Critical patent/JPH0621594B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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

Abstract

PURPOSE:To reduce the shock on switching to rich state or lean state of the air-fuel ratio of the mixed gas by controlling the above-described switching according to the engine operation state and adjusting the opening degree of a throttle valve so that the engine output is kept constant. CONSTITUTION:When air-fuel ratio is controlled by a control circuit 1 according to the output of an engine operation-state sensor S, air-fuel ratio control and ignition-timing control are executed in lean mode if the constant speed traveling is judged in the ordinary range where the engine revolution speed Ne is within a prescribed revolution range and the engine load is within a prescribed load range, and an injector 2 and an ignition-timing adjusting means 3 are controlled. In the transition from the rich state (or ideal air-fuel ratio) to the lean state in the air-fuel ratio control, a throttle motor 4 is controlled to increase-control the throttle opening degree so that the car speed before and after the shift of mode becomes a constant value with the same accelerator stepping-in amount. Therefore, the shock in switching mode can be reduced.

Description

【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、車両用エンジンの空燃比制御装置に関し、特
に自動車用エンジンにおける空燃比を切換制御しうる装
置に関する。
DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an air-fuel ratio control device for a vehicle engine, and more particularly to a device capable of switching and controlling the air-fuel ratio in a vehicle engine.

〔従来の技術〕[Conventional technology]

従来、自動車用エンジンにリーンセンサを付設して、エ
ンジンの常用域(tJtJ3図参照)での空燃比をリー
ン状態(例えば、22)に制御することにより、低燃費
をはかるものが提案されている。
Conventionally, it has been proposed to improve fuel efficiency by attaching a lean sensor to an automobile engine and controlling the air-fuel ratio to a lean state (for example, 22) in the normal operating range of the engine (see Figure tJtJ3). .

〔発明が解決しようとする問題点〕[Problem that the invention seeks to solve]

しかしながら、このような従来の空燃比制御手段では、
エンジンの運転状態が所定条件(エンジン回転数、負荷
、冷却水温¥F、)を満したときに、理論空燃比(スト
イキオ)から希薄(リーン)な空燃比に切換えるもので
あるが、その切換の際に、同じスロットル開度のままで
は、大幅なトルクダウンを生じて、乗員に不快なショッ
クを与えるという問題点がある。
However, with such conventional air-fuel ratio control means,
When the operating state of the engine satisfies predetermined conditions (engine speed, load, cooling water temperature, etc.), the stoichiometric air-fuel ratio is switched to a lean air-fuel ratio. However, if the throttle opening remains the same, there is a problem in that a significant torque reduction occurs, giving an unpleasant shock to the occupants.

そして、吸気通路に介装されたスロットル弁は、アクセ
ルペダルに連結されたワイヤにより駆動されているので
、スロットル弁の開度を大きくするためには、アクセル
ペダルを踏込まなければならず、スロットル開度の制御
を行ないづらいという問題点がある。
The throttle valve installed in the intake passage is driven by a wire connected to the accelerator pedal, so in order to increase the opening of the throttle valve, the accelerator pedal must be depressed. There is a problem that it is difficult to control the opening degree.

本発明は、このような問題点を解決しようとするもので
、空燃比のリッチ状態とリーン状態との切換時における
ショックの発生を防止しうるようにした、車両用エンジ
ンの空燃比制御装置を提供することを目的とする。
The present invention aims to solve these problems, and provides an air-fuel ratio control device for a vehicle engine that can prevent the occurrence of shock when the air-fuel ratio is switched between a rich state and a lean state. The purpose is to provide.

〔問題点を解決するだめの手段〕[Failure to solve the problem]

このため本発明の車両用エンジンの空燃比制御装置は、
Jit両用エンジンの吸気系へ供給される空気量の調整
を行なうスロットル弁と、上記吸気系へ燃料を供給する
燃料供給機構とをそなえるとともに、上記エンノンの運
転状態を検出するエンジン運転状態センサと、同エンジ
ン運転状態センサからの検出信号に応じて上記エンノン
の吸気系へ供給される混合気の空燃比をりンチ(理想空
燃比を含む。)状態またはリーン状態へ切換え制御しう
る空燃比切換手段とをそなえ、上記スロットル弁を駆動
してその開度を調整しうるスロットル弁駆動機構と、上
記空燃比切換手段により調整された空燃比の混合気量を
調整すべく上記スロットル弁駆動機構へ制御信号を供給
する制御手段と、上記空燃比切換手段でリッチ(理想空
燃比を含む。)状態とリーン状態との相互間の切換時に
」二元エンノンの出力が一定に保たれるように上記スロ
ットル弁の開度を1!4整する混合気調整制御信号を」
二元スロットル弁駆動機構へ供給する切換時調整手段と
が設けられたことを特徴としている。
Therefore, the air-fuel ratio control device for a vehicle engine of the present invention has the following features:
A throttle valve that adjusts the amount of air supplied to the intake system of the JIT dual-purpose engine, and a fuel supply mechanism that supplies fuel to the intake system, and an engine operating state sensor that detects the operating state of the ennon; Air-fuel ratio switching means capable of switching and controlling the air-fuel ratio of the air-fuel mixture supplied to the intake system of the Ennon to a lean state (including an ideal air-fuel ratio) or a lean state in response to a detection signal from the engine operating state sensor. a throttle valve drive mechanism capable of driving the throttle valve to adjust its opening; and a control to the throttle valve drive mechanism to adjust the air-fuel mixture amount at the air-fuel ratio adjusted by the air-fuel ratio switching means. control means for supplying a signal, and the air-fuel ratio switching means controls the throttle so that the output of the dual ennon is kept constant when switching between a rich (including ideal air-fuel ratio) state and a lean state. Mixture adjustment control signal that adjusts the valve opening by 1 to 4.
The present invention is characterized by being provided with switching adjustment means for supplying a signal to the two-way throttle valve drive mechanism.

〔作 用〕[For production]

上述の本発明の車両用エンジンの空燃比制御装置では、
エンジン運転状態センサがらの検出信号に応じて、空燃
比切換手段によりエンジンの吸気系へ供給される混合気
の空燃比をリッチ(理想空燃比を含む。)状態ないしリ
ーン状態へ切換えて、同時に、エンノン出力が一定に保
たれるように、スロットル弁の開度を調整する混合気調
整制御信号が切換時調整手段からスロットル弁駆動機構
へ送られ、これにより、スロットル弁の開度が調整され
る。
In the above-described air-fuel ratio control device for a vehicle engine of the present invention,
In response to the detection signal from the engine operating state sensor, the air-fuel ratio switching means switches the air-fuel ratio of the air-fuel mixture supplied to the intake system of the engine from a rich (including the ideal air-fuel ratio) state to a lean state, and at the same time, In order to keep the engine output constant, a mixture adjustment control signal for adjusting the opening of the throttle valve is sent from the switching adjustment means to the throttle valve drive mechanism, thereby adjusting the opening of the throttle valve. .

〔実施例〕〔Example〕

以下、図面により本発明の実施例について説明すると、
第1〜4図は本発明の一実施例としての車両用エンジン
の空燃比制御装置を示すもので、第1図はそのブロック
図、第2図はそのスロットル弁の模式図、第3図4よそ
の作用を示すグラフ、PIS4図はその制御手順を示す
フローチャートである。
Hereinafter, embodiments of the present invention will be explained with reference to the drawings.
1 to 4 show an air-fuel ratio control device for a vehicle engine as an embodiment of the present invention, in which FIG. 1 is a block diagram thereof, FIG. 2 is a schematic diagram of its throttle valve, and FIG. The PIS4 diagram, which is a graph showing other effects, is a flowchart showing the control procedure.

11.2図に示すように、自動車用エンノンの吸気系に
おける吸気通路15には、エンジンへ供給される空気量
を調整するためのスロットル弁16が介装されており、
このスロットル弁16は、空燃比切換手段、制御手段、
切換時W!4整手段を兼ねる制御回路(CPU)1から
の制御信号を受けるようになっていて、スロットル弁駆
動機構(ドライブバイワイヤ装置)としてのスロットル
モータ(ステップモータ)4に紬17を介して接続して
いて、軸17はスロットル開度センサ8を回動しうるよ
うに構成されている。
As shown in Figure 11.2, a throttle valve 16 for adjusting the amount of air supplied to the engine is installed in the intake passage 15 in the intake system of the automotive Ennon.
This throttle valve 16 includes air-fuel ratio switching means, control means,
W when switching! 4. It receives a control signal from a control circuit (CPU) 1 which also serves as a control means, and is connected to a throttle motor (step motor) 4 as a throttle valve drive mechanism (drive-by-wire device) via a pongee 17. The shaft 17 is configured to rotate the throttle opening sensor 8.

また、吸気通路15または燃焼室にはインジェクタ2が
設けられており、制御回路1がらの制御信号を受けて吸
気系へ燃料を供給するようになっていて、さらに、点火
時期調整手段3が設けられており、制御回路1からの制
御信号を受けて、イグニッションコイル5における点火
時期を11SI整することができる。
Further, an injector 2 is provided in the intake passage 15 or the combustion chamber, and receives a control signal from the control circuit 1 to supply fuel to the intake system.Furthermore, an ignition timing adjustment means 3 is provided. In response to a control signal from the control circuit 1, the ignition timing in the ignition coil 5 can be adjusted by 11SI.

そして、制御回路1には、エンジン運転状態センサSが
接続しており、エンジン運転状態センサSとして、点火
パルス信号を出力するイグニッションフィル(エンジン
回転数センサ)51点火時期を検出するクランク角セン
サ6、エンノンの冷却水温を検出する水温センサ7、ス
ロットル弁16の開度を検出する上述のスロットル開度
センサ8゜アクセルペダルの位置を検出するアクセル位
置センサ9.排気通路における空燃比のリーン状態を検
出するリーンセンサ10.排気通路における02濃度を
検出する02センサ11.アイドルアップ機構における
アイドル位置検出用モータボジシランセンサ12.吸気
通路15のブースト圧を検出するブーストセンサ13.
$速を検出する車速センサ14.吸入空気量を検出する
エアー70−センサ18が設けられている。
An engine operating state sensor S is connected to the control circuit 1, and includes an ignition filter (engine speed sensor) 51 that outputs an ignition pulse signal and a crank angle sensor 6 that detects the ignition timing. , a water temperature sensor 7 that detects the cooling water temperature of the Ennon, the above-mentioned throttle opening sensor 8 that detects the opening of the throttle valve 16, an accelerator position sensor 9 that detects the position of the accelerator pedal. A lean sensor 10 that detects the lean state of the air-fuel ratio in the exhaust passage. 02 sensor 11 for detecting 02 concentration in the exhaust passage. Motor position sensor for detecting idle position in idle up mechanism 12. A boost sensor 13 that detects the boost pressure in the intake passage 15.
Vehicle speed sensor 14 that detects $ speed. An air 70-sensor 18 is provided to detect the amount of intake air.

そして、制御回路1における空燃比切換手段としての機
能は、例えば、インジェクタ2からの燃料噴射量(F)
とエアー70−センサ18からの吸入空気fi(A>と
の比(A/F)を、インジェクタ2からの燃料噴射量(
F)を調整することによって行なうもので、この空気比
制御のため、所定空燃比におけるインジェクタ2からの
燃料噴射量とMBT(Minimua+ advanc
e for Be5t Torque)となる点火時期
とは、ベアになってメモリ等に記憶されている。
The function of the air-fuel ratio switching means in the control circuit 1 is, for example, to control the fuel injection amount (F) from the injector 2.
The ratio (A/F) of the intake air fi (A> from the air 70 to the sensor 18) is expressed as the fuel injection amount from the injector 2 (
F), and for this air ratio control, the fuel injection amount from the injector 2 at a predetermined air-fuel ratio and MBT (Minimua+advanc
The ignition timing (e for Be5t Torque) is stored bare in a memory or the like.

本発明の実施例としての車両用エンジンの空燃比制御装
置は上述のごとく構成されているので、第4図に示すよ
うに、エンジンのスタートが行なわれたことをキースイ
ッチ(Key Sw)により検出して、エンノン運転状
態センサSからの各検出信号を読み取り(符aO参照)
、エンジン回転数Neが所定回転域(N l< N e
 < N 2 )であり、(ステップa1.)、エンジ
ン負荷りが所定負荷域(L、<L<L2)であれば、(
ステップa2)、第3図中に示す常用域であると判定す
る。
Since the air-fuel ratio control device for a vehicle engine as an embodiment of the present invention is configured as described above, the start of the engine is detected by the key switch (Key Sw) as shown in FIG. and read each detection signal from the Ennon operation status sensor S (see mark aO).
, the engine speed Ne is within a predetermined rotation range (N l < Ne
<N 2 ), and (step a1.), if the engine load is in the predetermined load range (L, <L<L2), then (
In step a2), it is determined that the area is in the common use area shown in FIG.

この常用域において、冷却水温Tが所定温度T0以上で
(ステップa3)、アクセル開度θの変化量(dθ/d
t)が設定値8未満で(ステップa4)、さらに、車速
変化量(dV/dt)が設定値す未満であれば、(ステ
ップa5)、定速走行と判定して、ステップa6におい
て、リーンモードにおける空燃比A/F制御と点火時期
Ig制御とが行なわれ、ついで、スロットル弁16の制
御が行なわれる(ステップa7)。
In this normal use range, when the cooling water temperature T is higher than the predetermined temperature T0 (step a3), the amount of change in the accelerator opening θ (dθ/d
t) is less than the set value 8 (step a4), and if the amount of change in vehicle speed (dV/dt) is less than the set value (step a5), it is determined that the vehicle is running at a constant speed, and in step a6, lean Air-fuel ratio A/F control and ignition timing Ig control in the mode are performed, and then the throttle valve 16 is controlled (step a7).

ステップa6における空燃比A / F il制御でリ
ッチ(または、理想空燃比)状態からリーン状態への移
行時におけるスロットル弁16の制御が行なわれた際に
は、リッチモードにおけるスロットル開度からリーンモ
ードにおけるスロットル開度へ変化するように、スロッ
トル弁駆動機構としてのスロットルモータ4が制御され
る。
When the air-fuel ratio A/F il control in step a6 controls the throttle valve 16 at the time of transition from the rich (or ideal air-fuel ratio) state to the lean state, the throttle opening is changed from the throttle opening in the rich mode to the lean mode. The throttle motor 4 as a throttle valve drive mechanism is controlled so that the throttle opening changes to .

すなわち、同一のアクセルペダル踏込量において、モー
ドの移行前後における車速(または、エンジン回転数)
が一定値となるように、切換時調整手段からの混合気調
整制御信号により、スロットル開度が増大制御されるの
である。
In other words, the vehicle speed (or engine speed) before and after the mode transition for the same amount of accelerator pedal depression.
The throttle opening degree is controlled to increase by the air-fuel mixture adjustment control signal from the switching adjustment means so that the changeover time is a constant value.

そして、混合気量が増量制御されて、エンジン出力が一
定となる。
Then, the amount of air-fuel mixture is controlled to increase, and the engine output becomes constant.

また、エンジンの状態が常用域でない場合や定速走行で
ない場合には、ステップa1〜a5からステップa8へ
至り、リッチモードにおける空燃比A/F制御と点火時
期rg制御が行なわれて、ついで、スロットル弁16の
制御が行なわれる。そして、ステップa7における空燃
比A/F制御でり一ン状態からりッチ(または、理想空
燃比)状態への移行時におけるスロットル弁16の制御
が行なわれた際には、リーンモードにおけるスロットル
開度からリッチモードにおけるスロットル開度へ変化す
るように、スロットルモータ4が制御される。
Further, if the engine condition is not in the normal use range or if the engine is not running at a constant speed, steps a1 to a5 proceed to step a8, where air-fuel ratio A/F control and ignition timing rg control in rich mode are performed, and then, The throttle valve 16 is controlled. Then, when the air-fuel ratio A/F control in step a7 controls the throttle valve 16 at the time of transition from the lean state to the rich (or ideal air-fuel ratio) state, the throttle valve 16 in the lean mode is The throttle motor 4 is controlled so that the opening changes from the throttle opening to the rich mode throttle opening.

すなわち、同一のためアクセルペダルの踏込量において
、モードの移行前後における車速(まだは、エンノン回
転数)が一定値となるように、切換時調整手段からの混
合気v4整制御信号により、スロットル開度が減少制御
されるのである。
That is, since the amount of depression of the accelerator pedal is the same, the throttle is opened by the air-fuel mixture V4 adjustment control signal from the switching adjustment means so that the vehicle speed (currently, the engine speed) before and after the mode transition is a constant value. The temperature is controlled to decrease.

そして、混合気が減量制御されで、エンジン出力が一定
となる。
Then, the air-fuel mixture is controlled to be reduced, and the engine output becomes constant.

このような制御が、エンジンの回転中継続して行なわれ
る(ステップa10)。
Such control is continued while the engine is rotating (step a10).

なお、燃料供給機構として電子制御機構付き気化器式の
ものを用いてもよい。
Note that a carburetor type fuel supply mechanism with an electronic control mechanism may be used as the fuel supply mechanism.

〔発明の効果〕〔Effect of the invention〕

以上詳述したように、本発明の車両用エンノンの空燃比
制御装置によれば、車両用エンジンの吸気系へ供給され
る空気量の調整を行なうスロットル弁と、上記吸気系へ
燃料を供給する燃料供給機構とをそなえるとともに、上
記エンノンの運転状態を検出するエンジン運転状態セン
サと、同エンジン運転状態センサからの検出信号に応じ
て上記エンジンの吸気系へ供給される混合気の空燃比を
リッチ(I!I!想空燃比を含む。)状態またはリーン
状聾へ切換え制御しうる空燃比切換手段とをそなえ、上
記スロットル弁を駆動してその開度を調整しうるスロッ
トル弁駆動機構と、上記空燃比切換手段により調整され
た空燃比の混合気量を調整すべく上記スロットル弁駆動
機構へ制御信号を供給する制御手段と、上記空燃比切換
手段でリッチ(理想空燃比を含む。)状態とリーン状態
との相互間の切換時に上記エンジンの出力が一定に保た
れるように、上記スロットル弁の開度を調整する混合気
調整制御信号を上記スロットル弁駆動機構へ供給する切
換時調整手段とが設けられるという簡素な構造で、次の
ような効果ないし利点を得ることができる。
As described above in detail, the air-fuel ratio control device for a vehicle ennon of the present invention includes a throttle valve that adjusts the amount of air supplied to the intake system of a vehicle engine, and a throttle valve that supplies fuel to the intake system. and an engine operating state sensor that detects the operating state of the ennon, and enriches the air-fuel ratio of the air-fuel mixture supplied to the intake system of the engine in response to a detection signal from the engine operating state sensor. (Including I! I! imaginary air-fuel ratio) air-fuel ratio switching means capable of controlling switching to a lean state or a lean state, and a throttle valve drive mechanism capable of driving the throttle valve and adjusting its opening degree; A control means for supplying a control signal to the throttle valve drive mechanism to adjust the air-fuel mixture amount of the air-fuel ratio adjusted by the air-fuel ratio switching means, and a rich (including ideal air-fuel ratio) state in the air-fuel ratio switching means. switching adjustment means for supplying a mixture adjustment control signal for adjusting the opening degree of the throttle valve to the throttle valve drive mechanism so that the output of the engine is kept constant when switching between the lean state and the lean state; With this simple structure, the following effects and advantages can be obtained.

(1)アクセルペダル(エンノン運転状態センサ)とス
ロットル弁とが間接的に制御されて、空燃比の切換に応
じ、エンジンの出力が一定となるように、スロットル開
度を自動的に所定量変化させることができるので、エン
ジンの呂力変化によるショックを生じることがない。
(1) The accelerator pedal (engine operating state sensor) and throttle valve are indirectly controlled, and the throttle opening is automatically changed by a predetermined amount according to the air-fuel ratio change so that the engine output remains constant. Therefore, shocks due to engine power changes will not occur.

(2)上記第1項により、アクセルベグル揉作も容易に
なる。
(2) According to the above-mentioned item 1, it becomes easier to rub the accelerator.

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

第1〜4図は本発明の一実施例としての車両用エンジン
の空燃比制御装置を示すもので、第1図、はそのブロッ
ク図、第2図はそのスロットル弁の模式図、第3図はそ
の作用を示すグラフ、第4図はその制御手順を示す70
−チャートである。 1・・空燃比切換手段、制御手段、切換時1149手段
を兼ねる制御回路(cpu)、2・・燃料供給機構とし
てのインジェクタ、3・・点火時期調整手段、4・・ス
ロットル弁駆動機構(ドライブバイワイヤ装置)として
のスロットルモータ、5・・イグニツシ褒ンコイル(エ
ンジン回転数センサ)、6・・クランク角センサ、・7
・・水温センサ、8・・スロットル開度センサ、9・・
アクセル位置センサ、10・・リーンセンサ、11・・
0□センサ、12・・モータボジシシンセンサ、13・
φブーストセンサ、14・・車速センサ、15・・吸気
通路、16・・スロットル弁、17・・軸、18・・エ
アー70−センサ、S・・エンジン運転状態センサ。 代理人 弁理士 飯 沼 義 彦 第1図 第2図 第4図
1 to 4 show an air-fuel ratio control device for a vehicle engine as an embodiment of the present invention, in which FIG. 1 is a block diagram thereof, FIG. 2 is a schematic diagram of its throttle valve, and FIG. 70 is a graph showing its effect, and FIG. 4 is a graph showing its control procedure.
-It is a chart. 1. Control circuit (CPU) that also serves as air-fuel ratio switching means, control means, and 1149 means at the time of switching, 2. Injector as a fuel supply mechanism, 3. Ignition timing adjustment means, 4. Throttle valve drive mechanism (drive Throttle motor as by-wire device), 5. Ignition coil (engine speed sensor), 6. Crank angle sensor, 7.
・・Water temperature sensor, 8・・Throttle opening sensor, 9・・・
Accelerator position sensor, 10...Lean sensor, 11...
0□Sensor, 12... Motor body sensor, 13...
φ boost sensor, 14...vehicle speed sensor, 15...intake passage, 16...throttle valve, 17...shaft, 18...air 70-sensor, S...engine operating state sensor. Agent Patent Attorney Yoshihiko Iinuma Figure 1 Figure 2 Figure 4

Claims (1)

【特許請求の範囲】[Claims] 車両用エンジンの吸気系へ供給される空気量の調整を行
なうスロットル弁と、上記吸気系へ燃料を供給する燃料
供給機構とをそなえるとともに、上記エンジンの運転状
態を検出するエンジン運転状態センサと、同エンジン運
転状態センサからの検出信号に応じて上記エンジンの吸
気系へ供給される混合気の空燃比をリッチ状態またはリ
ーン状態へ切換え制御しうる空燃比切換手段とをそなえ
、上記スロットル弁を駆動してその開度を調整しうるス
ロットル弁駆動機構と、上記空燃比切換手段により調整
された空燃比の混合気量を調整すべく上記スロットル弁
駆動機構へ制御信号を供給する制御手段と、上記空燃比
切換手段でリッチ状態とリーン状態との相互間の切換時
に上記エンジンの出力が一定に保たれるように、上記ス
ロットル弁の開度を調整する混合気調整制御信号を上記
スロットル弁駆動機構へ供給する切換時調整手段とが設
けられたことを特徴とする、車両用エンジンの空燃比制
御装置。
An engine operating state sensor that includes a throttle valve that adjusts the amount of air supplied to the intake system of a vehicle engine, and a fuel supply mechanism that supplies fuel to the intake system, and that detects the operating state of the engine; and an air-fuel ratio switching means capable of switching and controlling the air-fuel ratio of the air-fuel mixture supplied to the intake system of the engine to a rich state or a lean state in response to a detection signal from the engine operating state sensor, and drives the throttle valve. a throttle valve drive mechanism capable of adjusting its opening degree; a control means for supplying a control signal to the throttle valve drive mechanism to adjust the air-fuel mixture amount of the air-fuel ratio adjusted by the air-fuel ratio switching means; The air-fuel ratio switching means sends a mixture adjustment control signal to the throttle valve drive mechanism to adjust the opening degree of the throttle valve so that the output of the engine is kept constant when switching between a rich state and a lean state. What is claimed is: 1. An air-fuel ratio control device for a vehicle engine, characterized in that an air-fuel ratio control device for a vehicle engine is provided.
JP60028006A 1985-02-15 1985-02-15 Air-fuel ratio controller for vehicle engine Expired - Lifetime JPH0621594B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP60028006A JPH0621594B2 (en) 1985-02-15 1985-02-15 Air-fuel ratio controller for vehicle engine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP60028006A JPH0621594B2 (en) 1985-02-15 1985-02-15 Air-fuel ratio controller for vehicle engine

Publications (2)

Publication Number Publication Date
JPS61187545A true JPS61187545A (en) 1986-08-21
JPH0621594B2 JPH0621594B2 (en) 1994-03-23

Family

ID=12236696

Family Applications (1)

Application Number Title Priority Date Filing Date
JP60028006A Expired - Lifetime JPH0621594B2 (en) 1985-02-15 1985-02-15 Air-fuel ratio controller for vehicle engine

Country Status (1)

Country Link
JP (1) JPH0621594B2 (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62103444A (en) * 1985-07-16 1987-05-13 Mazda Motor Corp Throttle valve controller for engine
JPS63201802A (en) * 1987-02-18 1988-08-19 Hitachi Ltd State discrimination type adaptive control system for engine
US5146885A (en) * 1990-01-31 1992-09-15 Toyota Jidosha Kabushiki Kaisha Air-fuel ratio control device for an engine
JPH06117319A (en) * 1992-10-05 1994-04-26 Hitachi Ltd Control system for internal combustion engine
US5642709A (en) * 1994-07-25 1997-07-01 Hitachi, Ltd. Engine power train control method and control apparatus for a vehicle
EP0927818A1 (en) * 1996-09-20 1999-07-07 Hitachi, Ltd. Engine control device
JP2008240557A (en) * 2007-03-26 2008-10-09 Osaka Gas Co Ltd Energy system

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5970853A (en) * 1982-10-18 1984-04-21 Hitachi Ltd Controller for car engine
JPS59200049A (en) * 1983-04-25 1984-11-13 Kogata Gas Reibou Gijutsu Kenkyu Kumiai Air-fuel ratio control mechanism for heat pump driving gas engine

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5970853A (en) * 1982-10-18 1984-04-21 Hitachi Ltd Controller for car engine
JPS59200049A (en) * 1983-04-25 1984-11-13 Kogata Gas Reibou Gijutsu Kenkyu Kumiai Air-fuel ratio control mechanism for heat pump driving gas engine

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62103444A (en) * 1985-07-16 1987-05-13 Mazda Motor Corp Throttle valve controller for engine
JPS63201802A (en) * 1987-02-18 1988-08-19 Hitachi Ltd State discrimination type adaptive control system for engine
US5146885A (en) * 1990-01-31 1992-09-15 Toyota Jidosha Kabushiki Kaisha Air-fuel ratio control device for an engine
JPH06117319A (en) * 1992-10-05 1994-04-26 Hitachi Ltd Control system for internal combustion engine
US5642709A (en) * 1994-07-25 1997-07-01 Hitachi, Ltd. Engine power train control method and control apparatus for a vehicle
US6345607B1 (en) 1994-07-25 2002-02-12 Hitachi, Ltd. Engine power train control method and control apparatus for a vehicle
EP0927818A1 (en) * 1996-09-20 1999-07-07 Hitachi, Ltd. Engine control device
EP0927818A4 (en) * 1996-09-20 2006-08-09 Hitachi Ltd Engine control device
JP2008240557A (en) * 2007-03-26 2008-10-09 Osaka Gas Co Ltd Energy system

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