JPS5915669A - Electronically controlled fuel injection device - Google Patents
Electronically controlled fuel injection deviceInfo
- Publication number
- JPS5915669A JPS5915669A JP57125079A JP12507982A JPS5915669A JP S5915669 A JPS5915669 A JP S5915669A JP 57125079 A JP57125079 A JP 57125079A JP 12507982 A JP12507982 A JP 12507982A JP S5915669 A JPS5915669 A JP S5915669A
- Authority
- JP
- Japan
- Prior art keywords
- fuel
- control valve
- metering chamber
- opening
- signal
- 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
- F02M59/36—Varying fuel delivery in quantity or timing by variably-timed valves controlling fuel passages to pumping elements or overflow passages
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】 本発明は内燃機関の燃料噴射装置に関する。[Detailed description of the invention] The present invention relates to a fuel injection device for an internal combustion engine.
従来周知の燃料噴射装置であるユニットインジェクタの
１例を第１図に示す。図において、燃料は図示しないフ
ィードポンプにより数ｋｇ／Ｃｍ２に加圧され入１１０
１．０より導入される。プランツヤＯ１は夕４ット０２
と一体になって動き、力Ａ ｔｉ ：３及びばね０４の
作用によってプランツヤバレル０５の中を往復運動する
。プランジャバレル０５とシランツヤ０１とによって形
成されるメータリング室０６内の燃料はプランツヤ０１
が下方への運動によりポー１−０７を過ぎた時点から圧
縮さＪ１始め。An example of a unit injector, which is a conventionally well-known fuel injection device, is shown in FIG. In the figure, fuel is pressurized to several kg/cm2 by a feed pump (not shown) and enters 110
Introduced from version 1.0. Plantsuya O1 is evening 4t02
It moves in unison with the plantar barrel 05 and reciprocates within the plant barrel 05 under the action of the force A ti :3 and the spring 04. The fuel in the metering chamber 06 formed by the plunger barrel 05 and the cylinder 01 is
J1 begins to be compressed from the point where it passes Po 1-07 due to downward movement.
釧弁０８の開弁圧を超える圧力に達すると釧ブ「０８が
開いて、噴口０９より機関シリンダ内に高圧噴射される
。プランジャ論がさらに下降し切欠きＯＩＡが＝Ｊｅ−
） ０７に達すると、ノークリング室０６と外部燃料通
路０１１が導通してノークリング室０６の内部圧力が低
下し針弁０８が閉じて噴射が終了する。When the pressure exceeds the opening pressure of the valve 08, the valve 08 opens and high-pressure injection is carried out from the injection port 09 into the engine cylinder.The plunger further descends and the notch OIA becomes =Je-
) When reaching 07, the no-cling chamber 06 and the external fuel passage 011 are brought into communication, the internal pressure of the no-cling chamber 06 decreases, the needle valve 08 closes, and the injection ends.
このような装置では１機関の燃料噴射タイミングはシラ
ンツヤＯＩ、プランツヤバレル（１５’、’Ｆ ）幾何
学的形状で決まり１機関回転速度に応じてタイミングの
進み、遅れを調整することが回動なので、広い速度範囲
、負荷範囲でタイミング調整を可能とするため、カムの
代シにソレノイ１゛パルグで制御される油圧シリンダを
用いる力法も発表されているが、別に高圧の油圧源が必
要で、／ステムのまとめ方がむずかしい。In such a device, the fuel injection timing for one engine is determined by the geometrical shape of the cylinder OI and the plant barrel (15', 'F), and the timing is rotated to adjust the advance or delay of the timing according to the rotational speed of the engine. Therefore, in order to enable timing adjustment over a wide speed and load range, a force method using a hydraulic cylinder controlled by a solenoid 1 pulse instead of a cam has been announced, but a separate high-pressure hydraulic source is required. So, / it's difficult to put the stems together.
本発明の目的は」二記の点に着目し、運転状態に応じて
タイミング及び噴射量が自由に調整できる燃料噴射装置
を提供することであり、その特徴とするところは、ユニ
ットインジェクタにおいて。The purpose of the present invention is to provide a fuel injection device that can freely adjust the timing and injection amount according to the operating condition, focusing on the following two points.
メータリング室に端面を臨ませカムに連動して往復動す
るプランツヤ、上記メータリング室への燃料供給路に設
けられ同供給路を開閉する制御弁。A planter whose end face faces the metering chamber reciprocates in conjunction with a cam, and a control valve provided in the fuel supply path to the metering chamber to open and close the supply path.
同制御弁の開閉時期をコントローラからの信号により制
御する電磁弁を備えたことである。It is equipped with a solenoid valve that controls the opening and closing timing of the control valve using signals from the controller.
水装置−一般に広く使用されている判型ポンプにも適用
でき、車両用、荷役運搬機械用、建設機（成用等に使用
される２サイクル、４ツイクルデイ一ゼル機関の燃料噴
射装置として広く利用できる。Water equipment - Can be applied to generally widely used size pumps, and widely used as fuel injection equipment for 2-cycle and 4-twin diesel diesel engines used in vehicles, cargo handling machines, construction machines, etc. can.
以下図面を参照して本発明による実施例につき説明する
。Embodiments of the present invention will be described below with reference to the drawings.
第２図は本発明による１実施例のユニットインジェクタ
を示す断面図である。FIG. 2 is a sectional view showing one embodiment of a unit injector according to the present invention.
図１ｒＣおいて、カム３とばね４の作用によって。In FIG. 1rC, by the action of cam 3 and spring 4.
シランツヤ１はホルダ２と一体となって、）・ウノング
５の中を往復運動する。The silan gloss 1 is integrated with the holder 2 and reciprocates inside the holder 5.
メータリング室６内の燃料は制御弁７に導かノ１ており
、制御弁スプール７ａが図示のように」一方にあるとき
は、フィードポンプＡからの燃料供給路１１とメータリ
ング室６とが導通している。The fuel in the metering chamber 6 is led to a control valve 7, and when the control valve spool 7a is on one side as shown in the figure, the fuel supply path 11 from the feed pump A and the metering chamber 6 are connected. Conductive.
第３図は制御弁部を示す断面図で、制ｍ１弁スノ。Figure 3 is a sectional view showing the control valve section, showing the control m1 valve section.
−ルアａが下方にある時を示す。- Indicates when lure a is below.
この時は、メータリング室６内の燃料は閉塞される。At this time, the fuel in the metering chamber 6 is blocked.
８はコントローラであり、電磁弁７ｂに開、閉の信号を
送る。なお、矢印Ｂはド；／ンを示ず。8 is a controller, which sends an open/close signal to the solenoid valve 7b. Note that arrow B does not indicate do;/on.
上記構成の場合の作用について述べる。The operation in the case of the above configuration will be described.
電磁弁７ｂが開の時は、圧力室７Ｃ内が無用となるため
、ばね７ｄの力によって制御弁スノ°−ルアａは上方に
押し上げられメータリング室６と燃料供給路１１が導通
するので、プランツヤ１がイ１復運動してもメータリン
グ室６内の燃ＩＩ ＆よ加圧されず、燃料は噴射されな
い。When the electromagnetic valve 7b is open, the inside of the pressure chamber 7C is useless, so the control valve snorter a is pushed upward by the force of the spring 7d, and the metering chamber 6 and the fuel supply path 11 are brought into communication with each other. Even if the planter 1 moves back, the fuel in the metering chamber 6 is not pressurized and no fuel is injected.
電磁弁７ｂが閉の時は、圧力室７Ｃ内はソイー＋゛、１
５ノフ０供給圧ノＪと等しくなシ、ばね７ｄの力に打ち
勝って制御弁スプール７ａを下方に押し下げる。この時
は、メータリング室６内の燃料は閉塞されるだめプラン
ツヤ１が下方へ動くことによって、燃料が加圧され針弁
９の開弁圧に達しだところで、噴口１０より燃ト１の噴
射が開始される。その後、コントローラ８かもの信号に
より電磁弁７ｂを開にすると、前述のように制御弁スプ
ール７ａが上方に押し上げられメータリング室６内の圧
力が下がり、針弁９の開弁圧以下になるため針弁９が閉
じて噴射が終了する。When the solenoid valve 7b is closed, the pressure inside the pressure chamber 7C is +゛, 1.
5, which is equal to the supply pressure J, overcomes the force of the spring 7d and pushes the control valve spool 7a downward. At this time, the fuel in the metering chamber 6 is not blocked, and as the plant gear 1 moves downward, the fuel is pressurized and when it reaches the opening pressure of the needle valve 9, the fuel 1 is injected from the nozzle 10. is started. After that, when the solenoid valve 7b is opened by a signal from the controller 8, the control valve spool 7a is pushed upward as described above, and the pressure in the metering chamber 6 decreases to below the opening pressure of the needle valve 9. The needle valve 9 closes and the injection ends.
」二連の場合には次の効果がある。” In the case of two series, there is the following effect.
第４図にカム３の変位と電磁弁７ｂの開閉タイミングの
関係を示す。FIG. 4 shows the relationship between the displacement of the cam 3 and the opening/closing timing of the solenoid valve 7b.
制御弁スプール７ａがメータリング室６内の燃料を閉塞
している時を制御弁閉として示しておりこの時燃料は噴
射される。The control valve is closed when the control valve spool 7a is blocking the fuel in the metering chamber 6, and fuel is injected at this time.
噴射開始タイミングの時に、コントローラ８から１１）
７磁弁閉の信号を発生させ燃料供給路ｌＯとメータリン
グ室６とを遮断することによシ、カム３が下方へ変位し
ている期間内であノ１．ぼ、ｆＬ；６３、の、Ｉ？イン
ドに噴射タイミングを設定することができる。At the time of injection start timing, controllers 8 to 11)
7. By generating a signal to close the solenoid valve and shutting off the fuel supply path lO and the metering chamber 6, the cam 3 is displaced downward. Bo, fL;63, no, I? Injection timing can be set in India.
噴射始期を一定にすることも、噴射量１υ１を−・定に
することも可能である。It is also possible to make the injection start time constant or to make the injection amount 1υ1 constant.
まだ、電磁弁閉の信号を発生しているＩＩ；’ｊ″間を
調整することにより、噴射量を調整することかてきる０
即ち１本発明によって簡単な機わ＾重構造で、燃料噴射
タイミング及び燃料噴射面を粘度よく調整することの可
能な電子制御燃料噴射装置を実現することができる。The injection amount can be adjusted by adjusting the interval II and 'j', which still generates a signal to close the electromagnetic valve. It is possible to realize an electronically controlled fuel injection device that can adjust timing and fuel injection surface with good viscosity.
第１図は従来のユニットインジェクタを示す断面図、第
２図は本発明によるＩ実施例のコ一つットインジェクタ
を示す断面図、第３図は第２図の制御弁の閉状態を示す
説明図、第４図に１カツ、の変（１”ｔと電磁弁の開閉
タイミングとの関係を示す線図でちる。
１・・・プランツヤ、３・・・カム、６・・・ノークリ
ング室、７・・・制御弁、７ｂ・・・電磁弁、８・・・
コントローラ、１１・・・燃料供給路。
７’ｔ’ｆ［￥］
汁３図
才４図FIG. 1 is a sectional view showing a conventional unit injector, FIG. 2 is a sectional view showing a one-piece unit injector according to an embodiment of the present invention, and FIG. 3 is an explanatory view showing the control valve in FIG. 2 in a closed state. , Figure 4 is a diagram showing the relationship between 1"t and the opening/closing timing of the solenoid valve. 1...Plant shaft, 3...Cam, 6...No-cling chamber, 7... Control valve, 7b... Solenoid valve, 8...
Controller, 11...fuel supply path. 7't'f [¥] Juice 3 figure Sai 4 figure
Claims (1)
端面を臨ませカムに連動して往復動するプランツヤ、上
記メータリング室への燃料供給路に設けられ同供給路を
開閉する制御弁、同制御弁の開閉時期をコントローラか
らの信号によシ制御する電磁弁を備えたことを特徴とす
る電子制御ムギ１噴射装置。In the J unit injector, the planter whose end face faces the metering chamber reciprocates in conjunction with the cam, the control valve installed in the fuel supply path to the metering chamber to open and close the supply path, and the opening/closing timing of the control valve. What is claimed is: 1. An electronically controlled wheat injection device, characterized in that it is equipped with a solenoid valve which is controlled by a signal from a controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57125079A JPS5915669A (en) | 1982-07-20 | 1982-07-20 | Electronically controlled fuel injection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57125079A JPS5915669A (en) | 1982-07-20 | 1982-07-20 | Electronically controlled fuel injection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5915669A true JPS5915669A (en) | 1984-01-26 |
Family
ID=14901306
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57125079A Pending JPS5915669A (en) | 1982-07-20 | 1982-07-20 | Electronically controlled fuel injection device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5915669A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5450724A (en) * | 1977-09-21 | 1979-04-20 | Daimler Benz Ag | Pump nozzle apparatus air compressed injection type internal combustion engine |
| JPS5631655B2 (en) * | 1975-11-06 | 1981-07-22 | ||
| JPS578358B2 (en) * | 1975-02-19 | 1982-02-16 |
-
1982
- 1982-07-20 JP JP57125079A patent/JPS5915669A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS578358B2 (en) * | 1975-02-19 | 1982-02-16 | ||
| JPS5631655B2 (en) * | 1975-11-06 | 1981-07-22 | ||
| JPS5450724A (en) * | 1977-09-21 | 1979-04-20 | Daimler Benz Ag | Pump nozzle apparatus air compressed injection type internal combustion engine |
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