JPS59229030A - Engine idling speed controller - Google Patents

Engine idling speed controller

Info

Publication number
JPS59229030A
JPS59229030A JP10382583A JP10382583A JPS59229030A JP S59229030 A JPS59229030 A JP S59229030A JP 10382583 A JP10382583 A JP 10382583A JP 10382583 A JP10382583 A JP 10382583A JP S59229030 A JPS59229030 A JP S59229030A
Authority
JP
Japan
Prior art keywords
engine
speed
idle
engine speed
battery voltage
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP10382583A
Other languages
Japanese (ja)
Inventor
Manabu Arima
学 有馬
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 JP10382583A priority Critical patent/JPS59229030A/en
Publication of JPS59229030A publication Critical patent/JPS59229030A/en
Pending legal-status Critical Current

Links

Classifications

    • 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
    • F02D31/004Electric control of rotation speed controlling air supply for idle speed control by controlling a throttle stop

Landscapes

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

Abstract

PURPOSE:To perform idling speed control accurately and surely, by detecting variations in engine load with that in battery voltage, while speculatively compensating an engine speed when a battery voltage variation comes to more than the specified value. CONSTITUTION:In time of detecting an idling state of an engine 1 by an idling detection device 10, an idling speed regulating device 8 is controlled by a control device 13 on the basis of the output of an engine speed detection device 11 and then feedback compensation takes place for making an engine speed come to the desired one. In addition, when a voltage variation in a battery 5 detected by a battery voltage detection device 12 comes to more than the specified value, idling speed regulating device 8 is controlled by the control device 13 and the engine speed is speculatively compensated as much as the specified value. With this constitution, control responsiveness to load variations can be improved and, what is more, a significant improvement in the reliability of idling speed control is well promoted.

Description

【発明の詳細な説明】 (産業上の利用分野) 本発明はエンジンのアイドル回転数制御装置の改良に関
するものである。
DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an improvement in an engine idle speed control device.

(従来技術) 一般に、この種エンジンのアイドル回転数制御装置は、
エンジンのアイドル運転状態においてエンジン回転数を
フィードバック補正により所定アイドル回転数に調整制
御するものである。そして、前照灯やりャデフオツガ等
の電気負荷もしくはクーラなどの作動またはその停止に
伴いエンジン負荷が瞬時に大ぎく変動した場合にも、こ
れに応じてエンジン回転数を瞬時に予め設定された目標
アイドル回転数にm整し得るよう、目標アイドル回転数
への調整を応答性良く行う必要がある。このため、従来
、上記電気負荷等の操作スイッチのON又はOFF操作
を検出することによりエンジン負荷の変動を検出して、
アイドル回転数が事実変動するのに先だって例えばスロ
ットル弁の開度を予め一率に所定開度だけ変化させるこ
とにより、アイドル回転数を目標回転数方向にいわゆる
見込み補正するようになされていた。
(Prior art) In general, the idle speed control device for this type of engine is
This system adjusts and controls the engine speed to a predetermined idle speed by feedback correction when the engine is in an idling operating state. Even if the engine load suddenly fluctuates significantly due to the operation or stoppage of electrical loads such as headlamps or coolers, the engine speed can be instantly adjusted to the preset target idle. It is necessary to adjust the target idle rotation speed with good responsiveness so that the rotation speed can be adjusted to m. For this reason, conventionally, fluctuations in the engine load are detected by detecting the ON or OFF operation of the operation switch of the electric load, etc.
Before the idle speed actually changes, for example, the opening degree of the throttle valve is changed in advance by a predetermined opening degree at a constant rate, so that the idle speed is corrected in the direction of the target rotation speed.

しかるに、上記従来のものでは、各電気負荷等エンジン
負荷毎に操作スイッチのON又はOFF操作を検出する
必要があるため、電気回路の構成が複雑になるという欠
点があった。
However, in the above-mentioned conventional device, it is necessary to detect the ON or OFF operation of the operation switch for each engine load such as each electric load, which has the disadvantage that the configuration of the electric circuit becomes complicated.

そのため、従来、例えば特開昭54−113725号公
報に開示されるように、アイドル回転数の変動量を検出
し、この回転数変動量が所定値以上になると児込み補正
を行うことにより電気回路構成を簡素にするようにした
ものが提案されているが、この提案のものでは、回転数
変動量が所定値以」−になった時点で初めて児込み補正
が行われる関係上、制御応答性が悪いという欠点がある
Therefore, conventionally, as disclosed in Japanese Patent Laid-Open No. 54-113725, for example, the amount of variation in the idle speed is detected, and when the amount of variation in the number of rotations exceeds a predetermined value, the electric circuit is A system with a simplified configuration has been proposed, but in this proposal, the control response is affected because the child-embedding correction is performed only when the amount of rotational speed fluctuation exceeds a predetermined value. The disadvantage is that it is bad.

(発明の目的) 本発明は、前照灯等の電気負荷の作動又はその停止によ
りバッテリ電圧が下降又は上昇するとオルタネータが作
動又は停止してエンジン負荷が増大又は減少したのちエ
ンジン回転数が変動すること、すなわち電気負荷の作動
又はその停止時にはエンジン回転数の変動に先立ってバ
ッテリ電圧が変動することに着目してなされたもので、
その目的とするところは、バッテリ電圧の変動に応じて
アイドル回転数を児込み補正することにより、回路構成
を簡素にしつつ、制御応答性の向上を図ることにある。
(Object of the Invention) The present invention provides that when the battery voltage decreases or increases due to the operation or stoppage of an electrical load such as a headlight, the alternator starts or stops, the engine load increases or decreases, and then the engine speed fluctuates. This was done by focusing on the fact that when an electrical load is activated or stopped, the battery voltage fluctuates before the engine speed changes.
The purpose of this is to improve control responsiveness while simplifying the circuit configuration by compensating the idle rotation speed according to fluctuations in battery voltage.

しかし、このようにバッテリ電圧の変動に基づいて見込
み補正を行う場合、電気負荷の作動が停止すると、バッ
テリ電圧は通常直ちに正常伯に上昇復帰するが、バッテ
リ容量が経年劣化等により小さくなっているときには、
その電圧復帰は徐々に行われるため、このような状態に
おいてもエンジン回転数の下降方向に児込み補正を行う
とエンジン回転数は直ちに大きく低下してエンスト(エ
ンジンストップ)し易くなる。このため、本発明は、さ
らに、バッテリ電圧の変動量が所定値以上になったとき
にのみ見込み補正を行うことにより、上記応答性の良い
アイドル回転数制御を正確かつ確実に行うことを目的と
する。
However, when making estimated corrections based on fluctuations in battery voltage in this way, when the electrical load stops operating, the battery voltage usually rises and returns to normal immediately, but the battery capacity has decreased due to aging etc. sometimes,
Since the voltage is restored gradually, even in such a state, if the engine speed is corrected in the direction of decreasing the engine speed, the engine speed will immediately drop significantly and the engine will easily stall (engine stop). Therefore, it is a further object of the present invention to accurately and reliably perform the above responsive idle speed control by performing estimated correction only when the amount of variation in battery voltage exceeds a predetermined value. do.

〈発明の構成) 、この目的達成のため、本発明の構成は、第1図に示す
ように、アイドル運転状態検出手段10によるエンジン
1のアイドル運転状態の検出時にはエンジン回転数検出
手段11からの出力に基づいて制御手段13によりアイ
ドル回転数調整手段8を制御してエンジン回転数を予め
設定された目標回転数にフィードバック補正するととも
に、バッテリ電圧検出手段12で検出したバッテリ5の
電圧変動間が所定値以上のときには上記制御手段13に
J:リアイドル回転数調整手段8を制御してエンジン回
転数を所定量見込み補正するようにしたちのである。
(Configuration of the Invention) In order to achieve this object, the configuration of the present invention, as shown in FIG. Based on the output, the control means 13 controls the idle rotation speed adjustment means 8 to feedback-correct the engine rotation speed to a preset target rotation speed, and also adjusts the voltage fluctuation of the battery 5 detected by the battery voltage detection means 12. When it is above a predetermined value, the control means 13 controls the re-idle rotation speed adjustment means 8 to correct the engine rotation speed by a predetermined amount.

このことにより、本発明では、バッテリ電圧の検出によ
り従来の如く電気負荷毎の作動又は停止の検出を不要に
して電気回路構成を簡素に1′委とともに、バッテリ電
圧変動量の所定値以上の検出により電気負荷の作動の開
始時又は停止時においてはオルタネータの作動又は停止
に伴ってエンジン回転数が変動するのに先立ち、エンジ
ン回転数を見込み補正してその制御応答性を向上し、し
かもバッテリ容量の低下状態時には電気負荷の作動の停
止時におけるエンジン回転数の見込み補正を行わないこ
とにより、その時のエンジン回転数の大幅低下を防止し
てアイドル回転数制御を正確かつ確実に行うようにして
いる。
As a result, the present invention simplifies the electrical circuit configuration by detecting the battery voltage, eliminating the need to detect activation or stoppage of each electrical load as in the conventional method. When the electric load starts or stops operating, the engine speed is estimated and corrected before the engine speed fluctuates as the alternator starts or stops, improving its control response. By not correcting the estimated engine speed when the electric load stops operating when the engine speed is decreasing, the system prevents the engine speed from significantly decreasing at that time and performs idle speed control accurately and reliably. .

(発明の効果) したがって、本発明によれば、エンジンのアイドル運転
状態時にはエンジンのアイドル回転数を予め設定された
目標回転数にフィードバック補正すると共にエンジン負
荷の変動に応じて見込み補正するようにしたエンジンの
アイドル回転数制御装置において、電気負荷の作動又は
停止に伴うエンジン負荷の変動をバッテリ電圧の変動に
より検出し、バッテリ電圧変動量が所定値以上になると
、エンジン回転数を所定1児込み補正するようにしたの
で、エンジンのアイドル回転数制ワ11装置を簡単な構
成でもって安価に提供できるとともに、負荷変動に対す
る制御応答性の向上およびアイドル回転数制御の信頼性
の向上を図ることができるものである。
(Effects of the Invention) Therefore, according to the present invention, when the engine is in an idling operating state, the idle rotation speed of the engine is feedback-corrected to a preset target rotation speed, and estimated correction is made in accordance with fluctuations in engine load. In an engine idle speed control device, fluctuations in the engine load due to activation or stoppage of the electrical load are detected by fluctuations in battery voltage, and when the amount of battery voltage fluctuation exceeds a predetermined value, the engine speed is corrected by a predetermined value. As a result, the engine idle speed control 11 device can be provided at a low cost with a simple configuration, and it is also possible to improve the control response to load fluctuations and improve the reliability of idle speed control. It is something.

(実施例) 以下、本発明の技術的手段の具体例としての実施例を図
面に基づいて詳細に説明する。
(Example) Hereinafter, an example as a specific example of the technical means of the present invention will be described in detail based on the drawings.

第2図において、1はエンジン、2は吸気通路、3は該
吸気通路2内に配設された吸入空気量を制御するスロッ
トル弁、4は気化器である。また、5は車載バッテリで
ある。さらに、6は上記スロットル弁3の全開状態を検
出するアイドルセンサ、7はエンジン1の回転数を検出
するエンジン回転数センサ、8は上記スロットル弁3の
開度を大小制御してエンジン1のアイドル回転数を調整
する電磁弁よりなるアイドル回転数調整手段である。
In FIG. 2, 1 is an engine, 2 is an intake passage, 3 is a throttle valve disposed in the intake passage 2 and controls the amount of intake air, and 4 is a carburetor. Further, 5 is an in-vehicle battery. Furthermore, 6 is an idle sensor that detects the fully open state of the throttle valve 3, 7 is an engine rotation speed sensor that detects the rotation speed of the engine 1, and 8 is a sensor that controls the opening degree of the throttle valve 3 to keep the engine 1 idling. This is an idle rotation speed adjustment means consisting of a solenoid valve that adjusts the rotation speed.

加えて、9は上記アイドルセンサ6がらのス1]ットル
弁全開信号およびエンジン回転数センサ7からのエンジ
ン回転数信号を受けると共に上記車載バッテリ5の給電
電圧を検出する制御回路であって、該制御回路9は第4
図に示す制御フローに基づいて上記アイドル回転数調整
手段8を作動制御するものである。
In addition, reference numeral 9 denotes a control circuit that receives the throttle valve fully open signal from the idle sensor 6 and the engine speed signal from the engine speed sensor 7, and detects the power supply voltage of the vehicle battery 5. The control circuit 9 is the fourth
The operation of the idle rotation speed adjusting means 8 is controlled based on the control flow shown in the figure.

次に第4図の制御フローについて説明する(尚、図中S
o〜S 14はステップ番号を示す)。先ず、スタート
Soから第1ステツプS1において上記アイドルセンサ
6からのス【コツドル弁全開48号を受けているか否か
を判定し、受IフでいないNoの場合にはアイドル運転
状態でないと判断しくこの判定を繰返す一方、受けてい
るYESの場合にはさらにエンジン回転数センザ7h日
らのエンジン回転数信丹値Xがアイドル回転数上限値Y
以下であるか否かを判定し、上限値7以上のNoの場合
にはアイドル運転状態でないと判断して第1ステツプS
1に戻る一方、上限値YJ:り小さいY IE Sの場
合にはアイドル運転状態であると判断して第3ステツプ
S3に進む。
Next, the control flow in Fig. 4 will be explained (in addition, S
o~S 14 indicates the step number). First, in the first step S1 from the start So, it is determined whether or not the idle valve fully open signal 48 is received from the idle sensor 6, and if the response is No, it is determined that the engine is not in an idling state. While repeating this judgment, if the received answer is YES, the engine speed sensor 7h later engine speed Shintan value X will be the idle speed upper limit value Y.
If the upper limit value is 7 or more (No), it is determined that the vehicle is not in an idling state, and the first step S is performed.
On the other hand, if Y IES is smaller than the upper limit YJ, it is determined that the engine is in an idling state and the process proceeds to the third step S3.

次いで、第3ステツプS3において上記車載バッテリ5
の電圧Voを検出したのち、−[紗面のバッテリ電圧V
Tとこの電圧Voどの差VT−VOつまり電圧下降方向
の電圧変動量を演紳し、この電圧変動量VT−Voを所
定電圧変動値Vt−+ と大小比較でる。そして、第3
図(ロ)に示づ如くバッテリ電圧の変動量VT−Voが
所定電圧変動1直VLIより大きいYESの場合には電
気角6なの作動に伴うエンジン負荷の増大によりエンジ
ン回転数が大幅低下する場合であると判断して上記アイ
ドル回転数調整手段8を所定量例えば電圧変動fnVv
−Voに応じた分だけスロットル弁3の開度を大きくす
るよう見込み補正する一方、所定電圧変動fiVL+以
下のNoの場合にはエンジン回転数の変動mが小さくて
見込み補正をする必要がないと判断して直ちに第6ステ
ツプS6に進む。
Next, in a third step S3, the vehicle battery 5 is
After detecting the voltage Vo of -[the battery voltage V of the gauze surface
The difference VT-VO between T and this voltage Vo, that is, the amount of voltage fluctuation in the voltage decreasing direction, is calculated, and this voltage fluctuation amount VT-Vo is compared in magnitude with a predetermined voltage fluctuation value Vt-+. And the third
As shown in Figure (B), if the battery voltage variation VT-Vo is larger than the predetermined voltage variation 1 shift VLI (YES), the engine speed will drop significantly due to an increase in engine load due to the operation of electrical angle 6. It is determined that the idle rotation speed adjusting means 8 is adjusted by a predetermined amount, for example, voltage fluctuation fnVv.
A prospective correction is made to increase the opening degree of the throttle valve 3 by an amount corresponding to -Vo, while if No is less than the predetermined voltage fluctuation fiVL+, the fluctuation m of the engine speed is small and there is no need to make a prospective correction. After the determination, the process immediately proceeds to the sixth step S6.

そして、今度は第6ステツプS6において電圧上昇方向
の電圧変動量Vo−VTを所定電圧変動値VL2と大小
比較し、同図(ロ)に示す如く所定電圧変動値VL2よ
り大きいYESの場合には電気負荷の作動の停止に伴う
エンジン負荷の軽減によりエンジン回転数が大幅上昇す
る場合であると判断してアイドル回転数調整手段8を所
定量だけスロットル3の開度を小さくするよう見込み補
正する。一方、所定電圧変動量VL2以下のNoの場合
には電気負荷の作動の停止に伴うエンジン回転数の上昇
変動量が小さく、又は大きい場合であってもその変化が
緩やかである(すなわち車載バッテリ5の容量が小さい
場合〉であると判断してアイドル回転数調整手段8の作
動制御を行わない。
Then, in the sixth step S6, the voltage fluctuation amount Vo-VT in the voltage increasing direction is compared with the predetermined voltage fluctuation value VL2, and if YES is larger than the predetermined voltage fluctuation value VL2 as shown in FIG. It is determined that the engine speed is significantly increased due to the reduction of the engine load due to the stoppage of the operation of the electric load, and the idle speed adjusting means 8 is prospectively corrected to reduce the opening degree of the throttle 3 by a predetermined amount. On the other hand, if No is less than the predetermined voltage fluctuation amount VL2, the increase fluctuation amount of the engine speed due to the stoppage of the operation of the electric load is small, or even if it is large, the change is gradual (i.e., the vehicle battery 5 If the capacity of

続いて、第8ステツプs8において1秒毎に胴側した(
T−1)紗面までのバッテリ電圧検出値V、T −+・
・・Voをそれぞれ1デークづ゛っ繰」二げて1秒前の
バッテリ電圧値VTを設定したのち、予め設定された目
標アイドル回転数Δをメモリがら読出すとともに、上記
エンジン回転数センリフがらのエンジン回転数信号に基
づき現在のエンジン回転数Bを読出し、この現在のエン
ジン回転数Bが上記目標アイドル回転数へに等しいが否
かを判定する。そして、等しいYESの場合には適正回
転数であると判断して直ちに第1ステツプs1に戻る一
方、等しくないNoの場合には現在のエンジン回転数B
が目標アイドル回転数Aより大きいか否かを判定し、大
ぎいYESの場合にはエンジン回転数が高すぎると判断
してスロットル弁3の開度を小さくするようアイドル回
転数調整手段8をフィードバック補正して第1スデツプ
s1に戻る一方、目標アイドル回転数Aにり小さいNo
の場合には逆にエンジン回転数が低すぎると判断してス
ロットル弁3の開度を大きくするようアイドル回転数調
整手段8をフィードバック補正して第1ステツプS+に
戻る。
Subsequently, in the eighth step s8, the body side was turned every 1 second (
T-1) Battery voltage detection value V up to the gauze surface, T -+・
After setting the battery voltage value VT from 1 second ago by increasing Vo by 1 day each, read out the preset target idle speed Δ from the memory, and read out the engine speed senrif mentioned above. The current engine speed B is read out based on the engine speed signal, and it is determined whether the current engine speed B is equal to the target idle speed. If they are equal, YES, it is determined that the engine speed is appropriate and the process immediately returns to the first step s1, whereas if they are not equal, the current engine speed B
is larger than the target idle rotation speed A, and if it is too large, it is determined that the engine rotation speed is too high, and the idle rotation speed adjustment means 8 is fed back to reduce the opening degree of the throttle valve 3. While correcting and returning to the first step s1, the number smaller than the target idle rotation speed A
In this case, on the other hand, it is determined that the engine speed is too low, and the idle speed adjusting means 8 is feedback corrected to increase the opening degree of the throttle valve 3, and the process returns to the first step S+.

よって、上記制御フローにおいて第1ステツプS+′C
’アイドルセンサ6からのスロットル弁全開信号の受信
の有無を判別すると共に第2ステツプS2でエンジン回
転数信号値Xをアイドル回転数上限値Yと大小比較する
ことにより、エンジン1のアイドル運転状態を検出する
ようにしたアイドル運転状態検出手段10を構成してい
るとともに、エンジン回転数センサ7によりエンジン回
転数検出手段11を構成している。また、上記制御フロ
ーの第3ステツプS3でバッテリ電圧を検出することに
よりバッテリ電圧検出手段12を構成しているとともに
、第9ステツプS8から第14ステツプS 14におい
て現在のエンジン回転数Bが目標アイドル回転数Aにな
るようにアイドル回転数調整手段8を作動制御すると共
に、第4ステツプS4から第8ステツプS8においてバ
ッテリ電圧変動量V7−’Vo(又ハVo −VT )
 カ所定ffi圧変動値VLI(又はvL2)より大ぎ
いときにはアイドル回転数調整手段8を所定量見込み補
正するようにした制御手段13を椙或している。
Therefore, in the above control flow, the first step S+'C
'The idle operating state of the engine 1 is determined by determining whether or not the throttle valve fully open signal is received from the idle sensor 6, and by comparing the engine speed signal value X with the idle speed upper limit value Y in the second step S2. The engine rotational speed sensor 7 constitutes an engine rotational speed detection means 11. Further, the battery voltage detection means 12 is configured by detecting the battery voltage in the third step S3 of the above control flow, and the current engine rotation speed B is changed to the target idle in the ninth step S8 to the fourteenth step S14. The idle rotation speed adjusting means 8 is operated and controlled so that the rotation speed becomes A, and at the same time, from the fourth step S4 to the eighth step S8, the battery voltage fluctuation amount V7-'Vo (also Vo-VT) is controlled.
A control means 13 is provided which is adapted to correct the idle rotation speed adjusting means 8 by a predetermined amount when the ffi pressure fluctuation value is larger than a predetermined ffi pressure fluctuation value VLI (or vL2).

次に、上記実施例の作動を第3図を参照しながら説明す
る。先ず、エンジンのアイドル運転状態において同図(
イ)に示す如く電気負荷がその操作スイッチのON操作
によりA点で作動を開始した場合、第4図の制御フロー
の第4ステツプS4において電圧下降方向の電圧変tl
JJlllVT−Voが所定電圧変動値VL+ と比較
され、同図(ロ)に示す如く所定電圧変動1111VL
1より大き゛いときには、同図(ハ)に示す如くエンジ
ン回転数が目標アイドル回転数より大きく下降(るとき
であると判断されて第5ステツプS5でスロットル弁3
の開度を所定量だけ大きくづ−るようアイドル回転数調
整手段8が制御手段13により見込み補正される。この
ことにより、エンジン回転数は上記電気負荷の作動に伴
って下降するのに先立って目標ア   ・イドル回転数
以」−に上昇し始めたのち、エンジン負荷の増大に伴っ
て下降するとともに、第9ステツプS9以降のエンジン
回転数のフィードバック補正により速やかに目標アイド
ル回転数に調整される。よって、エンジン負荷の増大に
対する制御応答性を向上させることができ、従来の如く
エンジン負荷の増大に応じてエンジン回転数が下降する
ことはない。尚、電圧下降方向の電圧変動量vT−VO
が同図(ニ)に示す如く所定電圧変動値VLI以下の場
合には、同図(ホ)に示す如くエンジン回転数の下降変
動量が小さいときであると判断されてエンジン回転数の
見込み補正は行われず、エンジン回転数は一端若干下降
したのち第9ステツプS9以降のフィードバック補正に
より目標アイドル回転数に応答性良く調整される。
Next, the operation of the above embodiment will be explained with reference to FIG. First, in the idling state of the engine, the figure (
When the electric load starts operating at point A by turning on its operation switch as shown in b), in the fourth step S4 of the control flow in FIG.
JJlllVT-Vo is compared with the predetermined voltage fluctuation value VL+, and as shown in the same figure (b), the predetermined voltage fluctuation value 1111VL
When the value is greater than 1, it is determined that the engine speed is significantly lower than the target idle speed, as shown in FIG.
The idle rotation speed adjusting means 8 is prospectively corrected by the control means 13 so as to increase the opening degree by a predetermined amount. As a result, the engine speed begins to rise above the target idle speed before it falls as the electrical load operates, and then decreases as the engine load increases, and then begins to rise again. The engine speed is quickly adjusted to the target idle speed by feedback correction of the engine speed after the ninth step S9. Therefore, control responsiveness to an increase in engine load can be improved, and the engine speed does not decrease in response to an increase in engine load as in the conventional case. In addition, the voltage fluctuation amount vT-VO in the voltage decreasing direction
If it is less than the predetermined voltage fluctuation value VLI as shown in the figure (d), it is determined that the downward fluctuation amount of the engine speed is small as shown in the figure (e), and the estimated engine speed is corrected. is not performed, and after the engine speed drops slightly, it is adjusted to the target idle speed with good responsiveness through feedback correction from the ninth step S9 onwards.

一方、同図(イ)に示す如く電気負荷がその操作スイッ
チのOFF操作により8点で作動を停止した場合、同図
(ロ)に示すバッテリ電圧が実線の如く所定時間経過後
に又は破線で示す如く直ちに上昇変化して、電圧上昇方
向の電圧変動量V。
On the other hand, if the electrical load stops operating at 8 points due to the OFF operation of its operation switch as shown in Figure (A), the battery voltage as shown in Figure (B) will change after a predetermined time as shown by the solid line or as shown by the broken line. The amount of voltage fluctuation V in the voltage increasing direction immediately changes as shown in FIG.

−VTが所定電圧変動値VL2より木きくなったとぎに
は、このことが制御フローの第6ステツプS6で検出さ
れてエンジン回転数が同図(ハ)に示す如く大きく上昇
変化する状態であると判断され、第7ステツプS7でス
ロットル弁3のInn fαを所定量だけ小さくするよ
うアイドル回転数調整手段8が制御手段13により見込
み補正される。このことにより、エンジン回転数は上記
電気負荷の作動の停止に伴う上昇変化に先立って目標ア
イドル回転数より一端下降したのち、エンジン負荷の軽
減により上昇変化するとともに制御フローの第9ステツ
プS9以陪のフィードバック補正により目標アイドル回
転数に調整される。J:って、エンジン負荷の軽減に対
する制御応答性を向」二さゼることができ、従来の如く
エンジン負荷の軽減に応じてエンジン回転数が上昇する
ことはない。尚、同図(ニ)に示で如く電圧上昇方向の
電圧変動量Vo−VTが所定電圧変動値V l−2以に
である場合、又は同図(ロ)に一点鎖線で示す如く1秒
内の電圧変動量Vo−VTが所定電圧変動値VL2以下
である場合(すなわち車載バッテリ5の容量が低下して
いる状態時においてエンジン負荷が軽減された場合)に
は、同図〈ホ)および(ハ)に示寸如くエンジン回転数
の変動量が小さいが又は変化が緩やかであり、この状態
でエンジン回転数を低下させるよう見込み補正を行うと
エンスト(エンジンストップ)すると制御されて、上記
見込み補正は行われず、このため、エンジン回転数はエ
ンジン負荷の低減により若干上昇したのちその後はフィ
ードバック補正により目標アイドル回転数に応答性良く
調整されることになり、アイドル回転数の調整制御の信
頼性を向上させることができる。
- When VT becomes lower than the predetermined voltage fluctuation value VL2, this is detected in the sixth step S6 of the control flow, and the engine speed increases greatly as shown in FIG. Then, in a seventh step S7, the idle rotation speed adjusting means 8 is prospectively corrected by the control means 13 so as to reduce Inn fα of the throttle valve 3 by a predetermined amount. As a result, the engine speed first decreases from the target idle speed before increasing due to the stoppage of the electric load operation, and then increases due to the reduction of the engine load and continues from the ninth step S9 of the control flow. is adjusted to the target idle rotation speed through feedback correction. J: Therefore, the control response to a reduction in engine load can be improved, and the engine speed does not increase in response to a reduction in engine load as in the past. In addition, if the voltage fluctuation amount Vo-VT in the voltage increasing direction is equal to or less than the predetermined voltage fluctuation value Vl-2 as shown in FIG. When the voltage fluctuation amount Vo-VT is less than the predetermined voltage fluctuation value VL2 (that is, when the engine load is reduced while the capacity of the on-board battery 5 is decreasing), As shown in (c), the amount of variation in the engine speed is small or the change is gradual, and if the estimated correction is made to lower the engine speed in this state, the engine will stall (engine stop). No correction is performed, and as a result, the engine speed increases slightly due to the reduction in engine load, and then is adjusted to the target idle speed with good responsiveness through feedback correction, which improves the reliability of idle speed adjustment control. can be improved.

尚、上記実施例では、アイドル回転数調整手段8をスロ
ットル弁3の開度の大小制御によりエンジンのアイドル
回転数を調整するように構成したが、その伯、吸気通路
2に上記スロットル弁3をバイパスするバイパス通路を
設けたものでは、該バイパス通路の開口面積を大小制御
する制御弁を作動制御することにより、エンジンのアイ
ドル回転数を調整するようにしてもよいのは勿論である
In the above embodiment, the idle speed adjusting means 8 is configured to adjust the idle speed of the engine by controlling the opening degree of the throttle valve 3. Of course, in the case where a bypass passage is provided, the idle speed of the engine may be adjusted by controlling the operation of a control valve that controls the opening area of the bypass passage.

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

第1図は本発明の構成を示すブロック図、第2図〜第4
図は本発明の実施例を示し、第2図は全体概略構成図、
第3図(イ)〜(ボ)はそれぞれ作動説明図、第4図は
制御回路の制御フローを示すフローチャート図である。 1・・・エンジン、5・・・車載バッテリ、8・・・ア
イドル回転数調整手段、1o・・・アイドル運転状態検
出手段、11・・・エンジン回転数検出手段、12・・
・バッテリ電圧検出手段、13・・・制御手段。 第1図 第2図 第3図
Figure 1 is a block diagram showing the configuration of the present invention, Figures 2 to 4
The figure shows an embodiment of the present invention, and FIG. 2 is an overall schematic configuration diagram,
FIGS. 3A to 3B are operation explanatory diagrams, and FIG. 4 is a flowchart showing the control flow of the control circuit. DESCRIPTION OF SYMBOLS 1... Engine, 5... Vehicle battery, 8... Idle speed adjustment means, 1o... Idle driving state detection means, 11... Engine speed detection means, 12...
-Battery voltage detection means, 13...control means. Figure 1 Figure 2 Figure 3

Claims (1)

【特許請求の範囲】[Claims] (1)  エンジンのアイドル運転状態を検出するアイ
ドル運転状態検出手段と、エンジンの回転数を検出する
エンジン回転数検出手段と、バッテリの電圧を検出する
バッテリ電圧検出手段と、エンジンのアイドル回転数を
調整するアイドル回転数調整手段と、上記アイドル運転
状態検出手段の出力を受はエンジンがアイドル運転状態
にあるとき上記エンジン回転数検出手段の出力を受はエ
ンジン回転数が予め設定された目標回転数になるように
上記アイドル回転数調整手段を制御するとともに、上記
バッテリ電圧検出手段の出力を受はバッテリ電圧変動量
が所定値以上のときには上記アイドル回転数調整手段を
所定員見込み補正する制御手段とを備えたことを特徴と
するエンジンのアイドル回転数制御装鉛。
(1) An idling state detection means for detecting the idling state of the engine, an engine speed detection means for detecting the engine speed, a battery voltage detection means for detecting the battery voltage, and an idling state detection means for detecting the engine idling speed. The idle speed adjusting means adjusts the engine speed and receives the output of the idle operating state detecting means when the engine is in the idle operating state. control means that receives the output of the battery voltage detection means and corrects the idle rotation speed adjustment means to estimate a predetermined number of passengers when the amount of battery voltage fluctuation is equal to or greater than a predetermined value; An engine idle speed control lead loading system characterized by being equipped with.
JP10382583A 1983-06-09 1983-06-09 Engine idling speed controller Pending JPS59229030A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10382583A JPS59229030A (en) 1983-06-09 1983-06-09 Engine idling speed controller

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10382583A JPS59229030A (en) 1983-06-09 1983-06-09 Engine idling speed controller

Publications (1)

Publication Number Publication Date
JPS59229030A true JPS59229030A (en) 1984-12-22

Family

ID=14364185

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10382583A Pending JPS59229030A (en) 1983-06-09 1983-06-09 Engine idling speed controller

Country Status (1)

Country Link
JP (1) JPS59229030A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6022037A (en) * 1983-07-15 1985-02-04 Honda Motor Co Ltd Method of controlling idling speed of internal- combustion engine
JPS6022039A (en) * 1983-07-15 1985-02-04 Honda Motor Co Ltd Feedback control method for idling speed of internal- combustion engine
WO1996032578A1 (en) * 1995-04-11 1996-10-17 Hitachi, Ltd. System and method for controlling a generator for a vehicle
JP2003083136A (en) * 2001-09-06 2003-03-19 Sawafuji Electric Co Ltd Engine drive generating device
JP2006299922A (en) * 2005-04-20 2006-11-02 Fuji Heavy Ind Ltd Engine control device

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5596330A (en) * 1979-01-18 1980-07-22 Nissan Motor Co Ltd Engine revolution regulator of diesel engine
JPS58187553A (en) * 1982-04-28 1983-11-01 Mitsubishi Motors Corp Idling speed control device for engine
JPS59128943A (en) * 1983-01-11 1984-07-25 Toyota Motor Corp Idle revolution control method

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5596330A (en) * 1979-01-18 1980-07-22 Nissan Motor Co Ltd Engine revolution regulator of diesel engine
JPS58187553A (en) * 1982-04-28 1983-11-01 Mitsubishi Motors Corp Idling speed control device for engine
JPS59128943A (en) * 1983-01-11 1984-07-25 Toyota Motor Corp Idle revolution control method

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6022037A (en) * 1983-07-15 1985-02-04 Honda Motor Co Ltd Method of controlling idling speed of internal- combustion engine
JPS6022039A (en) * 1983-07-15 1985-02-04 Honda Motor Co Ltd Feedback control method for idling speed of internal- combustion engine
JPH0451657B2 (en) * 1983-07-15 1992-08-19 Honda Motor Co Ltd
JPH0451656B2 (en) * 1983-07-15 1992-08-19 Honda Motor Co Ltd
WO1996032578A1 (en) * 1995-04-11 1996-10-17 Hitachi, Ltd. System and method for controlling a generator for a vehicle
US5808367A (en) * 1995-04-11 1998-09-15 Hitachi, Ltd. Control system for vehicle generator and control method therefor
JP2003083136A (en) * 2001-09-06 2003-03-19 Sawafuji Electric Co Ltd Engine drive generating device
JP2006299922A (en) * 2005-04-20 2006-11-02 Fuji Heavy Ind Ltd Engine control device

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