JPS59126062A - Injection timing control device for unit injector - Google Patents
Injection timing control device for unit injectorInfo
- Publication number
- JPS59126062A JPS59126062A JP57233992A JP23399282A JPS59126062A JP S59126062 A JPS59126062 A JP S59126062A JP 57233992 A JP57233992 A JP 57233992A JP 23399282 A JP23399282 A JP 23399282A JP S59126062 A JPS59126062 A JP S59126062A
- Authority
- JP
- Japan
- Prior art keywords
- plunger
- pressure
- unit injector
- fuel
- injection
- 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
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
- F02M59/20—Varying fuel delivery in quantity or timing
- F02M59/32—Varying fuel delivery in quantity or timing fuel delivery being controlled by means of fuel-displaced auxiliary pistons, which effect injection
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
Abstract
Description
【発明の詳細な説明】
本発明はユニットインジェクタにおいて、噴射時期を可
変とした装置に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device in which injection timing is variable in a unit injector.
ユニットインジェクタは噴射管がないため応答性がよく
、かつ噴射量の計量性、脈動に基づく欠点などがなく、
低燃費の要請の強い昨今、注目を集めている。The unit injector has no injection tube, so it has good response, and there are no problems with metering the injection amount or pulsation.
These days, there is a strong demand for low fuel consumption, and they are attracting attention.
ところが、ユニットインジェクタの欠点の一つに、燃料
噴射時期の制御ができないと云うことがある。However, one of the drawbacks of unit injectors is that the fuel injection timing cannot be controlled.
すなわち、ユニットインジェクタは各シリンダ毎に取シ
付けられ、これをカム等で駆動するようになっているの
で従来の噴射ポンプのように簡単な機構によって噴射時
期を変えることは不可能である。That is, since a unit injector is attached to each cylinder and driven by a cam or the like, it is impossible to change the injection timing with a simple mechanism as in conventional injection pumps.
本発明では、ユニットインジェクタの圧送プランジャと
メータリングポートとの関連に着目し、圧送プランジャ
がメータリングポートを閉じる時期を変更することによ
シ実質的に燃料噴射時期を可変としたユニットインジェ
クタを提供せんとするものである。The present invention focuses on the relationship between the pressure-feeding plunger and the metering port of the unit injector, and provides a unit injector in which the fuel injection timing is substantially variable by changing the timing at which the pressure-feeding plunger closes the metering port. This is what I am trying to do.
以下、図によって本発明を説明する。The present invention will be explained below with reference to the drawings.
ユニットインジェクタ１はフォロワー２に連結した圧送
プランジャ３を有し、圧送プランジャ３は燃料溜シ４内
の燃料を圧送して噴射プランジャ５を駆動させる。噴射
プランジャ５はポンプ室６内の燃料をノズル７の端部の
噴口８から燃焼室９内へ噴射する。電磁弁１０は一回毎
の燃料噴射量をポンプ室６へ与えるものであシ、計量は
電磁弁１０の開弁時間によって定められる。The unit injector 1 has a pressure-feeding plunger 3 connected to a follower 2, and the pressure-feeding plunger 3 forces fuel in a fuel reservoir 4 to drive an injection plunger 5. The injection plunger 5 injects the fuel in the pump chamber 6 into the combustion chamber 9 from the injection port 8 at the end of the nozzle 7 . The solenoid valve 10 provides the amount of fuel to be injected into the pump chamber 6 each time, and metering is determined by the opening time of the solenoid valve 10.
燃料タンク１１内の燃料は、一方ではフィードポンプ１
２を介してフィルタ１３、サージタンク１４を通って電
磁弁１０へ与えられ、他方ではフィードポンプ１５を介
してフィルタ１６、丈−ジタンク１７を通って圧送燃料
の燃料溜シ４へ与えられる。The fuel in the fuel tank 11 is fed to the feed pump 1 on the one hand.
2, the fuel is supplied to the electromagnetic valve 10 via a filter 13 and a surge tank 14, and on the other hand, it is supplied via a feed pump 15 to a filter 16 and a surge tank 17 to the pumped fuel reservoir 4.
トリガーシステム１８の信号を受けて計算するコントロ
ーラ１９が設けられ、電磁弁１０を開閉する。A controller 19 is provided which receives and calculates the signals of the trigger system 18 and opens and closes the solenoid valve 10.
以上の構成は公知の構成であシ、（特開昭５６−１５１
２６２号参照）本発明では以下の構成を付加するもので
ある。The above configuration is a known configuration.
(See No. 262) The present invention adds the following configuration.
圧送プランジャ３の外周に歯加を切シ、これにラック２
１を係合させる。圧送プランジャ３は、ツク２１ｔ；ｔ
サーボモータ安にょル駆動され、サーボモータ２２はコ
ントローラ１９によって駆動制御される。Cut teeth on the outer periphery of the pressure-feeding plunger 3, and attach the rack 2 to this.
1 is engaged. The pressure-feeding plunger 3 is pressed 21t;t
The servo motor 22 is driven by a controller 19, and the servo motor 22 is driven and controlled by the controller 19.
圧送プランジャ３の下端に斜めにカットした部分おを設
け、メータリングポート冴の閉止時期をカット部分羽に
よって変更する。A diagonally cut portion is provided at the lower end of the pressure-feeding plunger 3, and the closing timing of the metering port is changed by the cut portion.
上記本発明の詳細な説明すると、フォロワー２がカム等
（図示しない）によって駆動されると、圧送プランジャ
３が下降する。すると、メータリングボート冴が閉止さ
れ、この時から燃料溜シ４内の燃料が圧送されて噴射プ
ランジャ５を駆動する。このため、ポンプ室６内の燃料
がノズル７の端部の噴口８から燃焼室９内へ噴射される
。To explain the present invention in detail, when the follower 2 is driven by a cam or the like (not shown), the pressure-feeding plunger 3 descends. Then, the metering boat is closed, and from this point on, the fuel in the fuel reservoir 4 is pumped to drive the injection plunger 5. Therefore, the fuel in the pump chamber 6 is injected into the combustion chamber 9 from the injection port 8 at the end of the nozzle 7.
燃料噴射が終了すると、トリガーシステム１８によって
検知された運転状態をコントロー、７１９で計算し、次
の噴射量を電磁弁１ｏの開弁時間によって定め、ポンプ
室６へ送シ込む。When the fuel injection is completed, the operating state detected by the trigger system 18 is calculated by the controller 719, the next injection amount is determined by the opening time of the electromagnetic valve 1o, and the fuel is injected into the pump chamber 6.
今、トリガーシステム１８によって検知された運転状態
がコントローラ１９の計算によって噴射時期の変更を要
するものと判定されたとすると、サーボモータｎがラッ
ク２１を駆動する。すると、圧送プランジャ３が回動し
、カット部分塾がメータリングボート冴を閉止する時期
を変える。Now, if the operating state detected by the trigger system 18 is determined by the calculation of the controller 19 to require a change in the injection timing, the servo motor n drives the rack 21. Then, the pressure-feeding plunger 3 rotates, changing the timing at which the cut portion closes the metering boat.
以上の説明において、ユニットインジェクタの具体的構
造には種々のものがあるので、本発明はその構造に限定
されるものではない。In the above description, since there are various specific structures of the unit injector, the present invention is not limited to these structures.
又、トリガーシステムはエンジン回転数、ロードレバー
位置、ミッションギヤ、冷却水温など適宜に採用される
。In addition, the trigger system is adopted depending on engine speed, load lever position, transmission gear, cooling water temperature, etc.
さらに、ラック駆動のサーボモータとして、機械的、電
気的、流体的な機構のどれを用いてもよい。Furthermore, any mechanical, electrical, or fluid mechanism may be used as the servo motor for driving the rack.
以上のとおシ、本発明によると次のような効果を奏する
。Through the above, the present invention provides the following effects.
ユニットインジェクタの噴射時期及び噴射量の制御を電
気的手段によって確実に行いうるものである。The injection timing and injection amount of the unit injector can be reliably controlled by electrical means.
従来の装置に格別の変更を加えることなく達成しうる。This can be achieved without making any special changes to conventional equipment.
図は本発明の一実施例を示す略断面図である。
１：ユニットインジェクタ、３：圧送プランジャ、４：
燃料溜ヤ、５：噴射プランジャ、６：ポンプ室、２３：
カット部分、２４：メータリングポート
代理人 弁理士辷 三 部The figure is a schematic cross-sectional view showing one embodiment of the present invention. 1: Unit injector, 3: Pressure feeding plunger, 4:
Fuel reservoir, 5: Injection plunger, 6: Pump chamber, 23:
Cut part, 24: Metering port agent Patent attorney 3 parts
Claims (1)
動させて燃料をノズル端噴口から燃焼室内へ噴射するユ
ニットインジェクタにおいて、圧送プランジャを回動自
在に設け、該圧送プランジャの端部な斜めにカットし、
燃料溜りのメータリングポートを該圧送プランジャが閉
じる時期を制御するための圧送プランジャ回動機構を設
け、−回の燃料噴射毎にユニットインジェクタへ噴射燃
料を送る電磁弁を設け、エンジンの運転状況を検知して
信号を発するコントロー２によシ前記回動機構及び電磁
弁を制御してなることを特徴とするユニットインジェク
タにおける噴射時期の制御装置。In a unit injector having at least a pressure-feeding plunger and injecting fuel from a nozzle end injection port into a combustion chamber by operating the pressure-feeding plunger, the pressure-feeding plunger is rotatably provided, and the end of the pressure-feeding plunger is cut diagonally. ,
A pressure-feeding plunger rotation mechanism is provided to control when the pressure-feeding plunger closes the metering port of the fuel reservoir, and a solenoid valve is provided to send injected fuel to the unit injector every - times of fuel injection, thereby controlling the engine operating status. An injection timing control device for a unit injector, characterized in that the rotation mechanism and the electromagnetic valve are controlled by a controller 2 that detects and issues a signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57233992A JPS59126062A (en) | 1982-12-31 | 1982-12-31 | Injection timing control device for unit injector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57233992A JPS59126062A (en) | 1982-12-31 | 1982-12-31 | Injection timing control device for unit injector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS59126062A true JPS59126062A (en) | 1984-07-20 |
Family
ID=16963841
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57233992A Pending JPS59126062A (en) | 1982-12-31 | 1982-12-31 | Injection timing control device for unit injector |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59126062A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6298765U (en) * | 1985-12-13 | 1987-06-23 | ||
| EP0742365A2 (en) * | 1995-05-06 | 1996-11-13 | Aaltje Keuning | Fuel injection device |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5281425A (en) * | 1975-12-24 | 1977-07-07 | Bosch Gmbh Robert | Pump nozzle for fuel injection device of internal combustion engine |
| JPS5713218A (en) * | 1980-06-28 | 1982-01-23 | Mitsubishi Heavy Ind Ltd | Suction system for 90(degrees) v type 8 cylinder 4 cycle internal combustion engine |
-
1982
- 1982-12-31 JP JP57233992A patent/JPS59126062A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5281425A (en) * | 1975-12-24 | 1977-07-07 | Bosch Gmbh Robert | Pump nozzle for fuel injection device of internal combustion engine |
| JPS5713218A (en) * | 1980-06-28 | 1982-01-23 | Mitsubishi Heavy Ind Ltd | Suction system for 90(degrees) v type 8 cylinder 4 cycle internal combustion engine |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6298765U (en) * | 1985-12-13 | 1987-06-23 | ||
| EP0742365A2 (en) * | 1995-05-06 | 1996-11-13 | Aaltje Keuning | Fuel injection device |
| EP0742365A3 (en) * | 1995-05-06 | 1997-08-27 | Aaltje Keuning | Fuel injection device |
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