JPS608340B2 - Fuel injection control device for internal combustion engine - Google Patents
Fuel injection control device for internal combustion engineInfo
- Publication number
- JPS608340B2 JPS608340B2 JP54101763A JP10176379A JPS608340B2 JP S608340 B2 JPS608340 B2 JP S608340B2 JP 54101763 A JP54101763 A JP 54101763A JP 10176379 A JP10176379 A JP 10176379A JP S608340 B2 JPS608340 B2 JP S608340B2
- Authority
- JP
- Japan
- Prior art keywords
- fuel
- fuel pressure
- fuel injection
- pressure
- 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.)
- Expired
Links
Landscapes
- Fuel-Injection Apparatus (AREA)
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
Description
【発明の詳細な説明】 この発明は内燃機関の燃料噴射制御装置に関する。[Detailed description of the invention] The present invention relates to a fuel injection control device for an internal combustion engine.
従釆の燃料噴射制御装置としては「例えば第１図に示す
ようなものがある（昭和４３王９月日産自動車株式会社
発行「整備要領書電子制御ガソリン噴射装置」）。As a subsidiary fuel injection control device, for example, there is one as shown in FIG. 1 (Maintenance Manual Electronically Controlled Gasoline Injection Device, published by Nissan Motor Co., Ltd., September 1963).
１はエンジン、２は吸気管に取り付けられた燃料噴射弁
、３は燃料噴射弁２及び燃料ポンプ４を駆動する信号を
作りだすコントロールユニット、５は吸入空気量を検出
する吸気量センサ、６はエンジン１のクランクの回転を
検出する回転センサ、７はエンジン１の冷却水の温度を
検出する冷却水温センサ、８‘まコントロールユニット
３等に供給する電源をＯＮ−ＯＦＦするィグニッション
スィッチ「及びエンジン１の始動装置をＯＮ−ＯＦＦす
るスタートスイッチであるキースイッチ、９は燃料タン
ク、１０は燃料圧力を一定に保つ燃圧調整弁である。1 is an engine, 2 is a fuel injection valve attached to an intake pipe, 3 is a control unit that generates a signal to drive the fuel injection valve 2 and fuel pump 4, 5 is an intake air amount sensor that detects the amount of intake air, and 6 is an engine 1, a rotation sensor that detects the rotation of the crank; 7, a cooling water temperature sensor that detects the temperature of the cooling water in the engine 1; 8', an ignition switch that turns on and off the power supplied to the control unit 3, etc.; 1 is a key switch which is a start switch for turning on and off the starting device, 9 is a fuel tank, and 10 is a fuel pressure regulating valve for keeping the fuel pressure constant.
燃料は燃料タンク９より燃料ポンプ４によって圧力を高
められて燃圧調整弁ＩＱへ送られる。The pressure of the fuel is increased by the fuel pump 4 from the fuel tank 9, and the fuel is sent to the fuel pressure regulating valve IQ.
燃圧調整弁１川ま燃料圧力を一定にし燃料を燃料噴射弁
２へ送る。燃料噴射弁は電磁弁によりできており、コン
トロールユニット３からの信号がＯＮの間開弁し燃料を
エンジン１の吸気管内へ噴射する。コントロールユニッ
ト３はマイクロコンピュータを内蔵しており、吸気量セ
ンサ５からの吸気量信号、回転センサ６からの回転信号
、冷却水温センサ７からの水温信号に応じた燃料噴射信
号を計算し「クランクの一定回転毎に燃料噴射弁２に出
力する。この燃料噴射信号は回転センサ６がクランクの
回転を検出し始めてから開始され、キースイツチ８によ
り電源がＯＦＦとなるか、回転センサ６がクランクの回
転停止を検出するまで継続される。又、コントロールユ
ニット３は回転センサ６の信号によりクランクが回転し
ている間だけ燃料ポンプを駆動する。The fuel pressure regulating valve 1 keeps the fuel pressure constant and sends fuel to the fuel injection valve 2. The fuel injection valve is made of a solenoid valve, and is opened while a signal from the control unit 3 is ON to inject fuel into the intake pipe of the engine 1. The control unit 3 has a built-in microcomputer and calculates a fuel injection signal according to the intake air amount signal from the intake air amount sensor 5, the rotation signal from the rotation sensor 6, and the water temperature signal from the cooling water temperature sensor 7. The fuel injection signal is output to the fuel injection valve 2 at each constant rotation.This fuel injection signal starts when the rotation sensor 6 starts detecting the rotation of the crank, and the power is turned off by the key switch 8 or when the rotation sensor 6 stops the rotation of the crank. Further, the control unit 3 drives the fuel pump only while the crank is rotating based on the signal from the rotation sensor 6.
しかしながら、このような従来の燃料噴射制御装置にあ
っては、電源がＯＮとなりスタートスィッチがＯＮとな
ってクランクが回転をはじめることによって燃料ポンプ
が作動を開始し燃圧が正規の値まで高くなるのに時間が
かかるため、燃圧が上がるまでの間噴射する燃料の量は
正確には制御できず「 このために始動に十分でない燃
料がまず余分に噴射され、着火しないのでさらにこの余
分な燃料が点火プラグに付着することで始動（特に袷間
始動）を困難にしたり、始動時にＨＣ、ＣＯなどの好ま
しくない成分を含む排気ガスを多量に発生するという問
題点があった。However, with such conventional fuel injection control devices, when the power is turned on, the start switch is turned on, and the crank starts rotating, the fuel pump starts operating and the fuel pressure increases to the normal value. Because it takes time for the fuel to rise, the amount of fuel injected cannot be accurately controlled until the fuel pressure rises, and as a result, the amount of fuel that is not sufficient for starting is first injected, and since it does not ignite, this extra fuel is then ignited. There have been problems in that the adhesion to the plug makes starting (particularly in-line starting) difficult, and generates a large amount of exhaust gas containing undesirable components such as HC and CO during starting.
この発明は、このような従来の問題点に着目してなされ
たもので、燃料噴射弁での燃料圧力が所定値に達するま
では、クランクシャフトが回転し燃料ポンプが駆動され
ても燃料噴射弁を閉弁保持し、燃料を噴射しないように
することにより〜上詫間題点を解決した燃料噴射制御装
置を提供することを目的としている。This invention was made by focusing on such conventional problems, and even if the crankshaft rotates and the fuel pump is driven, the fuel injection valve will not work until the fuel pressure at the fuel injection valve reaches a predetermined value. The object of the present invention is to provide a fuel injection control device that solves the above problems by keeping the valve closed and not injecting fuel.
以下、この発明の実施例を図面と共に前記従来の構成と
同一部分に同一符号を付して詳述する。Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings, in which the same parts as in the conventional structure are designated by the same reference numerals.
即ち、この発明にあっては第２図に例示するように、キ
−スイッチ８、吸気量センサ６、回転センサ６、冷却水
温センサ７からの信号に基づいてコントロールユニット
３により燃料ポンプ４、燃料噴射弁２を作動制御するよ
うにした構成にあって、前記燃圧調整弁１Ｑ‘こおける
燃料圧力を検出する燃圧検出装置亀富を設けて〜燃料圧
力が所定値に達するまでは燃料噴射弁を閉弁保持し「燃
料噴射を停止するようにしてある。本実施例にあっては
この燃圧検出装置富 １として燃圧センサを用いている
。第５図に燃圧調整弁亀Ｑおよび燃圧センサ１亀の具体
例を示す。That is, in this invention, as illustrated in FIG. 2, the fuel pump 4 and the fuel The configuration is such that the operation of the injection valve 2 is controlled, and a fuel pressure detection device Kametomi is provided to detect the fuel pressure at the fuel pressure regulating valve 1Q'. The valve is kept closed and fuel injection is stopped. In this embodiment, a fuel pressure sensor is used as the fuel pressure detection device 1. Fig. 5 shows the fuel pressure regulating valve turtle Q and the fuel pressure sensor 1. A specific example is shown below.
燃圧調整弁量川ま〜導入制御される吸気管負圧と燃料圧
力との差圧によりダイヤフラム弁亀６を作動させ、燃料
タンク９への燃料のリリーフ量を制御して燃圧を略一定
にする。Fuel pressure adjustment valve amount river is introduced The diaphragm valve turtle 6 is actuated by the differential pressure between the controlled intake pipe negative pressure and the fuel pressure, and the amount of fuel relieved to the fuel tank 9 is controlled to keep the fuel pressure approximately constant. .
燃圧センサ亀亀はこの燃圧調整弁１０からオリフィス１
２９ 竃３を介して吸気管負圧と燃圧とを導きもその差
圧によりダイヤフラム１４を動かし、この変位をダイヤ
フラムー４もこ装着したポテンションメータ１５により
検出するものである。次に本実施例装置の作用を説明す
る。The fuel pressure sensor is connected from this fuel pressure adjustment valve 10 to the orifice 1.
29 The negative pressure in the intake pipe and the fuel pressure are introduced through the stove 3, and the differential pressure therebetween moves the diaphragm 14, and this displacement is detected by a potentiometer 15 attached to the diaphragm 4. Next, the operation of the device of this embodiment will be explained.
始動時以外は従来と同様に動作する。It operates in the same way as before except when starting.
始動時は電源がＯＮ‘こなると同時に燃料ポンプ４をＯ
Ｎにする。When starting, turn on the fuel pump 4 at the same time as the power turns on.
Set it to N.
その後一定時間回転センサ６がクランクの回転を検出し
なければ燃料ポンプをＯＦＦとする。キースイツチ８の
スタートスイッチがＯＮの時は燃圧センサ亀 １の値を
コントロールユニット内のメモリに記憶している判定レ
ベルと比較し「判定レベル以上の燃圧のある時は噴射量
の計算を行ない噴射のための信号を燃料噴射弁２に出力
する。又燃圧が判定レベル未満の場合は噴射計算、噴射
信号の出力を行なわないので、燃料噴射弁は閉弁保持さ
れる。第３図にコントロールユニットの作動をフローチ
ャートとして掲げる。又、エンジン１が十分暖機してか
らの再始動では、燃圧があまり高くなくてもエンジンの
始動は可能であるため「先に冷却水温センサの信号を判
定して腰機終了後は燃圧にかかわらず燃料を噴射するか
「燃圧の判定レベルを冷却水温に応じてメモ川こ記憶し
ておき判定レベルを変えてもよい。After that, if the rotation sensor 6 does not detect rotation of the crank for a certain period of time, the fuel pump is turned off. When the start switch of key switch 8 is ON, the value of fuel pressure sensor 1 is compared with the judgment level stored in the memory in the control unit. A signal is output to the fuel injection valve 2.If the fuel pressure is less than the determination level, no injection calculation or injection signal output is performed, so the fuel injection valve is kept closed. The operation is shown as a flowchart.In addition, when restarting after engine 1 has warmed up sufficiently, it is possible to start the engine even if the fuel pressure is not very high. After the machine is finished, you can inject fuel regardless of the fuel pressure, or you can memorize the fuel pressure judgment level according to the cooling water temperature and change the judgment level.
前述の燃圧センサ１１１こよる燃圧の判定作用は、実質
的に燃圧が下っているエンジン始動時にしか行われず、
またし燃料の圧力上昇特性は燃料ポンプ４の駆動時間経
過にほぼ比例するため「 この燃圧センサを用いるかわ
りに燃圧検出装置として電源をＯＭこして燃料ポンプ４
が作動を開始してからの時間を計測するタイマー袋層（
図示省略）をコントロールユニット３に組込み、その時
間が所定以上経過した時には「燃圧も所定値以上上昇し
たと判定しても同じ効果を得ることができる。この場合
のコントロールユニットの作動をフローチャートとして
第４図に示す。この場合もエンジンの暖機後の再始動時
は、燃圧が高くなくともエンジンの始動は可能であり「
又燃圧も下がっていない事が考えられるので、冷却水温
を検知して腰機状態を検出し「 この信号に基づいて判
定時間を変えるようにしてもよい。尚、スタートスイッ
チをＯＮとしても、燃料が供給されないことがあるので
〜運転者に故障ではないことを知らせるために、警告灯
等を設けても良い。The above-mentioned fuel pressure determination function by the fuel pressure sensor 111 is performed only at the time of starting the engine when the fuel pressure is substantially lower.
In addition, since the fuel pressure increase characteristic is almost proportional to the elapsed driving time of the fuel pump 4, "Instead of using this fuel pressure sensor, the fuel pump 4 can be
A timer bag layer (
(not shown) is incorporated into the control unit 3, and when a predetermined time has elapsed, the same effect can be obtained even if it is determined that the fuel pressure has also increased by a predetermined value or more. This is shown in Figure 4. In this case as well, when restarting the engine after it has been warmed up, the engine can be started even if the fuel pressure is not high.
Also, since it is possible that the fuel pressure has not dropped, the cooling water temperature may be detected to detect the condition of the lower aircraft and the judgment time may be changed based on this signal.Also, even if the start switch is turned on, the fuel Since there are cases where the power is not supplied, a warning light or the like may be installed to notify the driver that there is no malfunction.
以上説明してきたように、この発明によれば、燃料噴射
弁に供給される燃料の圧力が所定値に達するまでは〜ク
ランクシャフトが回転し燃料ポンプが駆動されても燃料
を噴射しないようにしてあるためｔ始動時に正確な燃料
噴射量で噴射を開始することができ、のって始動を確実
に行なうことができると共に、余分な燃料の点火プラグ
への付着や、ＨＣ、ＣＯ等の未燃成分を含む排気ガスの
排出を低減することができるという効果が得られる。As explained above, according to the present invention, fuel is not injected until the pressure of fuel supplied to the fuel injection valve reaches a predetermined value even if the crankshaft rotates and the fuel pump is driven. This makes it possible to start injection with an accurate fuel injection amount at the time of starting, ensuring a reliable start, and preventing excess fuel from adhering to the spark plug and unburned HC, CO, etc. The effect is that the emission of exhaust gas containing components can be reduced.
第１図は従釆装置の系統図、第２図はこの発明の装置を
示す系統図、第３図、第４図は同装置の作用を示すフロ
ーチャート図、第５図は燃圧検出装置の一例を示す断面
図である。
１・・・・・・エンジン、２・・・・・・燃料噴射弁、
３・・・・・・コントロールユニット、４…・・・燃料
ポンプ、５…・・・吸気量センサ、６…・・・回転セン
サ、７・・・…冷却水温センサ、８・…・・キースィッ
チ、９・・・・・・燃料タンク、１０……燃圧調整弁、
１１・・…・燃圧調整弁（燃圧センサ）。
第１図
第２図
第５図
第３図
第４図Fig. 1 is a system diagram of the subordinate device, Fig. 2 is a system diagram showing the device of this invention, Figs. 3 and 4 are flowcharts showing the operation of the device, and Fig. 5 is an example of a fuel pressure detection device. FIG. 1...engine, 2...fuel injection valve,
3... Control unit, 4... Fuel pump, 5... Intake air amount sensor, 6... Rotation sensor, 7... Cooling water temperature sensor, 8... Key Switch, 9...Fuel tank, 10...Fuel pressure adjustment valve,
11...Fuel pressure adjustment valve (fuel pressure sensor). Figure 1 Figure 2 Figure 5 Figure 3 Figure 4
Claims (1)
し、燃料噴射弁から噴射供給する内燃機関の燃料噴射制
御装置において、燃圧調整弁における燃料圧力を検出す
る燃圧検出装置を設けて、燃料圧力が所定値に達するま
では燃料噴射弁を閉弁保持するように構成したことを特
徴とする内燃機関の燃料噴射制御装置。 ２ 燃圧検出装置が、燃料圧力と吸気管負圧の差圧で作
動するダイヤフラム装置である特許請求の範囲第１項記
載の内燃機関の燃料噴射制御装置。 ３ 燃圧検出装置が、燃料ポンプの作動開始からの時間
経過を検出するタイマー装置である特許請求の範囲第１
項記載の内燃機関の燃料噴射制御装置。[Scope of Claims] 1. In a fuel injection control device for an internal combustion engine in which the pressure of fuel supplied by a fuel pump is adjusted by a fuel pressure regulating valve and the fuel pressure is injected from a fuel injection valve, fuel pressure detection detects the fuel pressure at the fuel pressure regulating valve. 1. A fuel injection control device for an internal combustion engine, characterized in that the device is configured to keep a fuel injection valve closed until fuel pressure reaches a predetermined value. 2. The fuel injection control device for an internal combustion engine according to claim 1, wherein the fuel pressure detection device is a diaphragm device that operates based on a pressure difference between fuel pressure and intake pipe negative pressure. 3. Claim 1, wherein the fuel pressure detection device is a timer device that detects the passage of time from the start of operation of the fuel pump.
A fuel injection control device for an internal combustion engine according to paragraph 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP54101763A JPS608340B2 (en) | 1979-08-08 | 1979-08-08 | Fuel injection control device for internal combustion engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP54101763A JPS608340B2 (en) | 1979-08-08 | 1979-08-08 | Fuel injection control device for internal combustion engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5627064A JPS5627064A (en) | 1981-03-16 |
| JPS608340B2 true JPS608340B2 (en) | 1985-03-02 |
Family
ID=14309261
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP54101763A Expired JPS608340B2 (en) | 1979-08-08 | 1979-08-08 | Fuel injection control device for internal combustion engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS608340B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61188614U (en) * | 1985-05-14 | 1986-11-25 | ||
| JPH0262911U (en) * | 1988-06-28 | 1990-05-10 |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57203826A (en) * | 1981-06-10 | 1982-12-14 | Honda Motor Co Ltd | Controlling device for electronic fuel injection of internal-combustion engine |
| JPH0639935B2 (en) * | 1985-03-04 | 1994-05-25 | トヨタ自動車株式会社 | Energization control method for high-pressure solenoid valve of diesel engine |
| US4691680A (en) * | 1986-05-22 | 1987-09-08 | Brunswick Corporation | Starting-enrichment control for a fuel-injected engine |
| JPH04321737A (en) * | 1991-04-22 | 1992-11-11 | Sanshin Ind Co Ltd | Fuel injection device for internal combustion engine |
| DE4415640C2 (en) * | 1994-05-04 | 2003-05-15 | Bosch Gmbh Robert | Method and device for controlling an internal combustion engine |
| US7072757B2 (en) * | 2001-10-29 | 2006-07-04 | Caterpillar Inc. | Fuel control system |
| JP2007071061A (en) * | 2005-09-05 | 2007-03-22 | Kokusan Denki Co Ltd | Engine control system |
| JP6011174B2 (en) * | 2012-09-07 | 2016-10-19 | マツダ株式会社 | Spark ignition direct injection engine |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5397215U (en) * | 1977-01-12 | 1978-08-07 |
-
1979
- 1979-08-08 JP JP54101763A patent/JPS608340B2/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61188614U (en) * | 1985-05-14 | 1986-11-25 | ||
| JPH0262911U (en) * | 1988-06-28 | 1990-05-10 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5627064A (en) | 1981-03-16 |
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