JPS5810128A - Electronically controlled fuel injection device for internal-combustion engine - Google Patents
Electronically controlled fuel injection device for internal-combustion engineInfo
- Publication number
- JPS5810128A JPS5810128A JP10823281A JP10823281A JPS5810128A JP S5810128 A JPS5810128 A JP S5810128A JP 10823281 A JP10823281 A JP 10823281A JP 10823281 A JP10823281 A JP 10823281A JP S5810128 A JPS5810128 A JP S5810128A
- Authority
- JP
- Japan
- Prior art keywords
- acceleration
- circuit
- fuel injection
- throttle valve
- combustion engine
- 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
Links
- 239000000446 fuel Substances 0.000 title claims abstract description 52
- 238000002347 injection Methods 0.000 title claims abstract description 37
- 239000007924 injection Substances 0.000 title claims abstract description 37
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 20
- 230000001133 acceleration Effects 0.000 claims abstract description 44
- 238000006073 displacement reaction Methods 0.000 claims abstract description 6
- 238000001514 detection method Methods 0.000 claims description 10
- 239000012528 membrane Substances 0.000 claims 2
- 230000003111 delayed effect Effects 0.000 abstract 1
- 238000000034 method Methods 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 6
- 230000004069 differentiation Effects 0.000 description 2
- 239000000498 cooling water Substances 0.000 description 1
- 230000001934 delay Effects 0.000 description 1
- 238000013138 pruning Methods 0.000 description 1
- 235000021419 vinegar Nutrition 0.000 description 1
- 239000000052 vinegar Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/04—Introducing corrections for particular operating conditions
- F02D41/10—Introducing corrections for particular operating conditions for acceleration
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
Abstract
Description
【発明の詳細な説明】
この発明は、内燃機関の加速に対する即応性の早い電子
制御燃料噴射装置に関す名ものである。DETAILED DESCRIPTION OF THE INVENTION The present invention is famous for an electronically controlled fuel injection system that can quickly respond to acceleration of an internal combustion engine.
電子制御燃料噴射装置としては、例えば第１図の構成図
に示すようなものがある。まず構成を説明する。１は吸
気管、２は絞り弁、３は上記吸気管１の一個所に全気筒
分の燃料を供給する噴射弁、４は便宜上７個だけ図示す
る燃焼室１．５は吸入空気量を測定する吸入空気流量計
、６は内燃機関の回転角度および回転数を検出するクラ
ンクプーリに取付けられたクランク角センサ、７は上記
吸入１気流量計５およびクランク角センサ６等の出力信
号によって演算し、燃料噴射弁３を駆動する制御ユニッ
ト（以下、単に制御ユニットと記す）である。（ただし
破線部分を除く。）
つぎに作用を説明すると、絞り弁２を開いて加速した場
合、吸入空気量が増加した分だけ上記吸入空気流量計５
の出力信号が変化して制御ユニット７に入力し、該信号
を該制御ユニット７で演算のうえ、燃料噴射弁３から上
記吸入空気量に対応する燃料が噴射される。As an example of an electronically controlled fuel injection device, there is one shown in the configuration diagram of FIG. 1, for example. First, the configuration will be explained. 1 is an intake pipe, 2 is a throttle valve, 3 is an injection valve that supplies fuel for all cylinders to one place in the intake pipe 1, 4 is a combustion chamber (only 7 of which are shown for convenience), and 1.5 measures the amount of intake air. 6 is a crank angle sensor attached to a crank pulley that detects the rotation angle and rotation speed of the internal combustion engine; 7 is a crank angle sensor that is calculated based on the output signals of the intake 1 air flow meter 5 and the crank angle sensor 6, etc.; , a control unit (hereinafter simply referred to as a control unit) that drives the fuel injection valve 3. (However, the part with broken lines is excluded.) Next, to explain the operation, when the throttle valve 2 is opened and acceleration is performed, the intake air flow meter 5
The output signal changes and is input to the control unit 7, which calculates the signal and injects fuel corresponding to the intake air amount from the fuel injection valve 3.
しかし、このような電子制御燃料噴射装置においては、
加速に際して吸入空気量の変化を検出し、該信号によっ
て燃料噴射量を制御ユニットによシ演算のうえ燃料噴射
弁に対して出力する構成になっていたため、加速開始時
に燃焼室への燃料供給が遅れ、いきづき燃焼やパック７
アイヤが発生するという問題点があった。However, in such an electronically controlled fuel injection device,
During acceleration, changes in the amount of intake air are detected, and based on this signal, the fuel injection amount is calculated by the control unit and output to the fuel injection valve, so that the fuel supply to the combustion chamber is interrupted at the start of acceleration. Delay, Ikizuki Burning and Pack 7
There was a problem that aiya occurred.
この発明は、このような問題点に着目してなされたもの
で、上記吸入空気量の変化よりも早い入力信号として、
絞り弁の開度および絞り弁の角変童速度を用いることに
より、加速時点をいち早く検知し、しかも加速検知と同
時に燃料を割シ込み噴射によって供給する構成にするこ
とにより、上記問題点を解決することを、目的としてい
る。This invention was made with attention to such problems, and as an input signal that is faster than the change in the intake air amount,
By using the opening degree of the throttle valve and the angle change speed of the throttle valve, the acceleration point can be detected quickly, and the above problem is solved by having a configuration in which fuel is supplied by interrupt injection at the same time as acceleration is detected. The purpose is to.
以下、この発明を図面に基づいて説明する。上記第１図
に破線部分を追加した第１図は、この発明の一実施例の
構成図、第２図は、制御ユニット７の電気回路図を示す
。なお各図中、同一または同等のものには同一の符号を
付ける。第１図の破線部分の８は絞り弁２の開度および
角変位速度を検出する絞り弁開度センサ例えば摺動抵抗
器である。９．１０は絞り弁２の角変位速度を検出する
ための回路で、そのうちの９は、微分回路、１０は比較
回路を示す。１１は加速判定回路で、比較回路１０の出
力と絞り弁開度検出回路１３の出力とのＡＮＤ回路ヲ構
成している。１２はパルス発生回路で、加速検知時点に
燃料を割シ込み噴射するパルス幅をきめる回路である。The present invention will be explained below based on the drawings. FIG. 1, in which dashed line parts are added to FIG. 1, is a block diagram of an embodiment of the present invention, and FIG. 2 is an electric circuit diagram of the control unit 7. As shown in FIG. In each figure, the same or equivalent parts are given the same reference numerals. Reference numeral 8 indicated by the broken line in FIG. 1 is a throttle valve opening sensor, for example, a sliding resistor, which detects the opening degree and angular displacement speed of the throttle valve 2. 9.10 is a circuit for detecting the angular displacement speed of the throttle valve 2, of which 9 is a differentiation circuit and 10 is a comparison circuit. Reference numeral 11 denotes an acceleration determination circuit, which constitutes an AND circuit of the output of the comparison circuit 10 and the output of the throttle valve opening detection circuit 13. Reference numeral 12 denotes a pulse generation circuit, which determines the pulse width for injecting fuel at the time of acceleration detection.
（なお、図示してないが、上記パルス幅は、内燃機関の
冷却水温度等によって変えることもできる。）１４は燃
料噴射弁５の駆動回路、１５は通常のパルス幅を演算す
る演算回路で、該演算回路１５は、マイクロプロセッサ
を使用したディジタル回路でも、ＩＣ。(Although not shown, the above pulse width can also be changed depending on the cooling water temperature of the internal combustion engine, etc.) 14 is a drive circuit for the fuel injection valve 5, and 15 is an arithmetic circuit that calculates the normal pulse width. , the arithmetic circuit 15 may be a digital circuit using a microprocessor or an IC.
トランジスタ等によるアナログ回路でも使用可能である
。なお、パルス発生回路１２の※印部は、燃料噴射弁駆
動回路１４の※印部に接続するもので、上記各回路およ
びセンサにおけるＶＢは、電源電圧例えば図示してない
バッテリの■電圧を示、す。またパルス発生回路１２の
１２ａは、単安定形マルチバイブレータである。It can also be used with analog circuits such as transistors. Note that the part marked with * of the pulse generation circuit 12 is connected to the part marked with * of the fuel injection valve drive circuit 14, and VB in each circuit and sensor above indicates the power supply voltage, for example, the voltage of a battery (not shown). ,vinegar. Further, 12a of the pulse generating circuit 12 is a monostable multivibrator.
そして上述のセンサおよび各回路は、つぎのように結線
する。すなわち絞り弁開度センサ８の出力側を分岐して
、一方は微分回路？、比較回路１０を経て加速判定回路
１１の第１の入力側に、また他方は絞り弁開度検出回路
１３を経て上記加速判定回路１１の第２の入力側にそれ
ぞれ接続し、該加速判定回路１１の出力側を分剪して、
一方はパルス発生回路１２に、他方は該パルス発生回路
１２に接続する燃料噴射弁３の駆動装置１４に連結して
いる演算回路１５に接続した構成であって、必要とする
全気筒分の燃料を一回、吸気管の一個所に噴射すること
によって、まかなうものである。The above-mentioned sensor and each circuit are connected as follows. In other words, the output side of the throttle valve opening sensor 8 is branched, and one side is a differential circuit? , the other is connected to the first input side of the acceleration determination circuit 11 via the comparison circuit 10, and the other is connected to the second input side of the acceleration determination circuit 11 via the throttle valve opening detection circuit 13, and the acceleration determination circuit Pruning the output side of 11,
One side is connected to the pulse generation circuit 12, and the other side is connected to the arithmetic circuit 15 connected to the drive device 14 of the fuel injection valve 3 connected to the pulse generation circuit 12. This is accomplished by injecting a single injection into one location in the intake pipe.
つぎに作用を説明する。絞り弁２を開いて加速すると、
その時点の絞り弁興度センサ８の゛出力信号が制御ユニ
ツ・ドアの微分回路９および絞り弁開度検出回路１３に
入力する。微分回路９は、絞り弁２の角変位速度に応じ
た電圧を出力し、該出力値が比較回路１０によって予め
定められている値以上になった場合を、加速に対応する
絞り弁２の角、変位速度と判定−する。絞り弁開度検出
回路１３は、絞り弁２が、予め定められている値以上に
開いたときに信号を出力する。上記比較回路１０と絞り
弁開度検出回路１３との双方の出力は、ＡＮＤ回路から
なる加速判定回路１１に−おいて、上記絞り弁開度が設
定値以上で、かつ絞り弁２の角変位速度が予め設定した
値以上の場合に限り、上記加速判定回路１１からパルス
発生回路１２に対して信号を出力する。上記のようにし
て、該パルス発生回路１２が加速開始を検知した時点で
燃料噴射パルス幅をきめ、燃料噴射弁３の駆動回路１４
により燃料噴射弁３を作動する。また加速判定回路１１
の出力を演算回路１５に入力することにより、正規燃料
噴射パルス幅も予め設定した所定時間、増量を行うこと
ができる。Next, the effect will be explained. When opening throttle valve 2 and accelerating,
The output signal of the throttle valve opening degree sensor 8 at that time is input to the differential circuit 9 of the control unit door and the throttle valve opening degree detection circuit 13. The differentiation circuit 9 outputs a voltage according to the angular displacement speed of the throttle valve 2, and when the output value exceeds a value predetermined by the comparison circuit 10, the angle of the throttle valve 2 corresponding to acceleration is determined. , the displacement speed is determined. The throttle valve opening detection circuit 13 outputs a signal when the throttle valve 2 opens beyond a predetermined value. The outputs of both the comparator circuit 10 and the throttle valve opening detection circuit 13 are sent to an acceleration determination circuit 11 consisting of an AND circuit. Only when the speed is equal to or higher than a preset value, the acceleration determination circuit 11 outputs a signal to the pulse generation circuit 12. As described above, the pulse generation circuit 12 determines the fuel injection pulse width when it detects the start of acceleration, and the drive circuit 14 of the fuel injection valve 3 determines the fuel injection pulse width.
The fuel injection valve 3 is actuated. In addition, the acceleration determination circuit 11
By inputting the output to the arithmetic circuit 15, the regular fuel injection pulse width can also be increased for a predetermined period of time.
第３図には、第２の一実施例の制御ユニット７の電気回
路図を示すもので、該実施例は、加速検知時点の噴射燃
料を、全気筒に行渡るようにした実施例である。まず構
成を説明する。クランク角センサ６、加速判定回路１１
、パルス発生回路１２、燃料噴射弁駆動回路１４および
演算回路１５は、第１図または第２図に示したものと同
一で、１６はカウンタ回路である。そして該カウンタ回
路１６の第１の入力側に加速判定回路１１の出力側を、
また第２の入力側にクランク角センサ６の出力側をそれ
ぞれ接続し、該カウンタ回路１６の出力側を、パルス発
生回路１２を経て燃料噴射弁駆動回路１４に接続する。FIG. 3 shows an electrical circuit diagram of the control unit 7 of a second embodiment, and this embodiment is an embodiment in which the fuel injected at the time of acceleration detection is distributed to all cylinders. . First, the configuration will be explained. Crank angle sensor 6, acceleration determination circuit 11
, the pulse generating circuit 12, the fuel injection valve drive circuit 14, and the arithmetic circuit 15 are the same as those shown in FIG. 1 or 2, and 16 is a counter circuit. The output side of the acceleration determination circuit 11 is connected to the first input side of the counter circuit 16.
Further, the output sides of the crank angle sensor 6 are connected to the second input side, and the output side of the counter circuit 16 is connected to the fuel injection valve drive circuit 14 via the pulse generation circuit 12.
一方、加速判定回路１１から分岐した該加速判定回路１
１の出力側を演算回路１５に接続し、該演算回路１５の
出力側を上記燃料噴射弁駆動回路１４に接続してなるも
のである。On the other hand, the acceleration determination circuit 1 branched from the acceleration determination circuit 11
1 is connected to an arithmetic circuit 15, and the output side of the arithmetic circuit 15 is connected to the fuel injection valve drive circuit 14.
つぎに作用を述べる。カウンタ回路１６は、加速判定回
路１１からの信号とクランク゛角センサ６からの信号に
より、第４図の第２の一実施例（４気筒の場合）におけ
るタイミングチャートに示すように、正規タイミング以
外の割シ込み噴射として、加速検知時に一回、そしてそ
の時点から例えば４気筒内燃機関では１８０°ごとに、
また６気筒内燃′機関では１２０°ごとというように、
クランク軸の所定回転角度ごとに全気筒に行渡るまで、
予め定めた量だけ燃料を割シ込み噴射するための制御を
行なっている。また加速判定回路１１からの出力により
、演算回路１５において正規燃料噴射パルス幅を予め設
定した所定時間、増量を行うこともできる。Next, we will discuss the effect. The counter circuit 16 uses a signal from the acceleration determination circuit 11 and a signal from the crank angle sensor 6 to detect timing other than the normal timing, as shown in the timing chart for the second embodiment (in the case of 4 cylinders) in FIG. As an interrupt injection, once when acceleration is detected, and from that point on, for example, every 180 degrees in a 4-cylinder internal combustion engine,
Also, in a 6-cylinder internal combustion engine, every 120 degrees,
At every predetermined rotation angle of the crankshaft, the
Control is performed to inject fuel by a predetermined amount. Further, based on the output from the acceleration determination circuit 11, the normal fuel injection pulse width can be increased in the arithmetic circuit 15 for a predetermined period of time.
以上説明してきたように、この発明によれば、絞り弁開
度センサを使用することにより、内燃機関の加速時点を
検知し、該時点で所要燃料を噴射するように構成したた
め、加速時における燃料の供給遅れも殆んどなくなり、
いきづき燃焼やバツクファイヤもなく、円滑な加速がで
きるという効果が得られる。As explained above, according to the present invention, the point of acceleration of the internal combustion engine is detected by using the throttle valve opening sensor, and the required fuel is injected at that point. Supply delays have almost disappeared,
The effect is that there is no sudden combustion or backfire, and smooth acceleration can be achieved.
各実施例は、それぞれ上記共通の効果に加えて、さらに
以下のような効果がある。吸気管の一個所で燃料を供給
する方式の装置では、加速時に一回だけ燃料を割り込み
噴射しても、噴射した後に殆んど吸気行程になる一気筒
だけで吸入してしまい、他の気筒には供給できないが、
この発明では金気筒に行渡るように供給する装置にした
ため、加速時点の内燃機関の回転数上昇が早くなるとい
う効果がある。In addition to the above-mentioned common effects, each embodiment has the following effects. In a device that supplies fuel at one point in the intake pipe, even if fuel is injected only once during acceleration, it will be inhaled by only one cylinder, which is almost in the intake stroke after injection, and the fuel will be injected into the other cylinders. cannot be supplied to
In this invention, since the device is used to supply the fuel so that it is distributed throughout the cylinders, there is an effect that the rotational speed of the internal combustion engine increases quickly at the time of acceleration.
第１図は、電子制御燃料噴射装置の構成図（破線部分を
除いたもの）、破線部分を含めた第１図は、この発明の
一実施例の構成図、第２図は、第１図の制御ユニットの
電気回路図、第３図は、こ ′の発明の第２の一実施例
の制御ユニットの電気回路図、第４図は、第２の一実施
例のタイミングチャートを示す。
符号の説明
１・・・吸気管、２・・・絞シ弁、３・・・燃料噴射弁
、４・・・燃焼室、５・・・吸入空気流量計、６・・・
クランク角センサ、７・・・制御ユニット、８・・・絞
シ弁開度センサ、９・・・微分回路、１０・・・比較回
路、１１・・・加速判別回路、１２・・・パルス発生回
路、１３・・・絞り弁開度検出回路、１４・・・燃料噴
射弁駆動回路、１５・・・演算回路、１６・・・カウン
タ回路。FIG. 1 is a block diagram of an electronically controlled fuel injection system (excluding the broken line part), FIG. 1 including the broken line part is a block diagram of an embodiment of the present invention, and FIG. FIG. 3 is an electric circuit diagram of the control unit of the second embodiment of the present invention, and FIG. 4 is a timing chart of the second embodiment. Explanation of symbols 1... Intake pipe, 2... Throttle valve, 3... Fuel injection valve, 4... Combustion chamber, 5... Intake air flow meter, 6...
Crank angle sensor, 7... Control unit, 8... Throttle valve opening sensor, 9... Differential circuit, 10... Comparison circuit, 11... Acceleration discrimination circuit, 12... Pulse generation Circuit, 13... Throttle valve opening detection circuit, 14... Fuel injection valve drive circuit, 15... Arithmetic circuit, 16... Counter circuit.
Claims (3)
を供給し、かつ加速時期の検出手段を有する電子制御燃
料噴射装置において、正規の燃料噴射タイミングとは別
に、加速開始時点を即時に検知する手段を設け、該重膜
によって該加速開始時点の検知と同時に、予め設定した
燃料量を割り込み噴射する手段によって構成したことを
特徴とする内燃機関の電子制御燃料噴射装置。(1) In an electronically controlled fuel injection system that supplies fuel for all cylinders to a single point in the intake pipe of an internal combustion engine and has acceleration timing detection means, it is possible to immediately detect the acceleration start point in addition to the regular fuel injection timing. 1. An electronically controlled fuel injection system for an internal combustion engine, characterized in that the apparatus comprises a means for detecting the acceleration start point using the heavy membrane, and a means for interrupting and injecting a preset amount of fuel at the same time as the acceleration start point is detected by the heavy membrane.
て、絞り弁開度が予め設定した開度以上になり、−かつ
、絞り弁の角変位速度が予め設定した速度以上になった
時点を、加速開始時点と判定する加速判定回路を有する
ことを特徴とする特許請求の範囲第１項記載の内燃機関
の電子制御燃料噴射装置。(2) As a means for immediately detecting the acceleration start point, the time when the throttle valve opening becomes equal to or higher than a preset opening, and the angular displacement speed of the throttle valve becomes equal to or higher than a preset velocity; 2. The electronically controlled fuel injection system for an internal combustion engine according to claim 1, further comprising an acceleration determination circuit that determines that the acceleration has started.
料を供給し、かつ加速時期の検出手段を有する電子制御
燃料噴射装置において、正規の燃料噴射タイミングとは
別に、加速開始時点を即時に検知する手段を設け、該手
段によって該加速開始時点の検知と同時に、予め設定し
た燃料ｉ′を、上記検知時点およびその時点からクラン
ク軸の所定回転角度ごとに全気筒に行渡るまで、割り込
み噴射をする手段とによって構成したことを特徴とする
内燃機関の電子制御燃料噴射装置。(3) Fuel for all cylinders is stored in one place in the intake pipe of an internal combustion engine.
In an electronically controlled fuel injection device that supplies fuel and has means for detecting an acceleration timing, a means for immediately detecting the acceleration start point is provided in addition to the regular fuel injection timing, and the means detects the acceleration start point. At the same time, an internal combustion engine characterized by comprising means for injecting a preset fuel i' at the time of the detection and from that time at every predetermined rotational angle of the crankshaft until it is distributed to all cylinders. Electronically controlled fuel injection device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10823281A JPS5810128A (en) | 1981-07-13 | 1981-07-13 | Electronically controlled fuel injection device for internal-combustion engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10823281A JPS5810128A (en) | 1981-07-13 | 1981-07-13 | Electronically controlled fuel injection device for internal-combustion engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5810128A true JPS5810128A (en) | 1983-01-20 |
Family
ID=14479404
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10823281A Pending JPS5810128A (en) | 1981-07-13 | 1981-07-13 | Electronically controlled fuel injection device for internal-combustion engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5810128A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5848730A (en) * | 1981-09-14 | 1983-03-22 | Toyota Motor Corp | Fuel injection method for electronically controlled type fuel-injection internal-combustion engine |
| JPS59168233A (en) * | 1983-03-14 | 1984-09-21 | Toyota Motor Corp | Electronic fuel injection controlling method |
| JPS6166841A (en) * | 1984-09-11 | 1986-04-05 | Japan Electronic Control Syst Co Ltd | Electronic control fuel injection device for internal combustion engine |
| US7344365B2 (en) | 2003-08-11 | 2008-03-18 | Mitsubishi Heavy Industries, Ltd. | Scroll compressor with bypass holes communicating with an intake chamber |
-
1981
- 1981-07-13 JP JP10823281A patent/JPS5810128A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5848730A (en) * | 1981-09-14 | 1983-03-22 | Toyota Motor Corp | Fuel injection method for electronically controlled type fuel-injection internal-combustion engine |
| JPS59168233A (en) * | 1983-03-14 | 1984-09-21 | Toyota Motor Corp | Electronic fuel injection controlling method |
| JPS6166841A (en) * | 1984-09-11 | 1986-04-05 | Japan Electronic Control Syst Co Ltd | Electronic control fuel injection device for internal combustion engine |
| US7344365B2 (en) | 2003-08-11 | 2008-03-18 | Mitsubishi Heavy Industries, Ltd. | Scroll compressor with bypass holes communicating with an intake chamber |
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