JPS59190468A - Control device of fuel injection valve in diesel engine - Google Patents
Control device of fuel injection valve in diesel engineInfo
- Publication number
- JPS59190468A JPS59190468A JP6591383A JP6591383A JPS59190468A JP S59190468 A JPS59190468 A JP S59190468A JP 6591383 A JP6591383 A JP 6591383A JP 6591383 A JP6591383 A JP 6591383A JP S59190468 A JPS59190468 A JP S59190468A
- Authority
- JP
- Japan
- Prior art keywords
- valve
- fuel
- oil
- hydraulic
- controller
- 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.)
- Granted
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
- F02M47/00—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure
- F02M47/02—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure of accumulator-injector type, i.e. having fuel pressure of accumulator tending to open, and fuel pressure in other chamber tending to close, injection valves and having means for periodically releasing that closing pressure
Abstract
Description
【発明の詳細な説明】
本発明はディーゼル機関の燃料噴射弁制御装置に関Ｊる
ものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a fuel injection valve control device for a diesel engine.
従来のディーゼル機関の燃料噴射装置で噴射条件（燃料
噴（ト）圧力、燃料噴！）１開始時期および期間などの
条件）を任意に変更することは困難であった。しかし、
近年、実用化されつつある電子回路を用いた燃料噴射制
御システムにおいては、自由自在に燃料噴射条件を変更
することができるので、燃料油性状、機関負荷などに最
も適した運転ができる。この燃料噴射制御システムの内
で最も問題となるのは燃料弁制御を目標通りに高速で作
動できるか否かである。このための制御指令はコンピュ
ータなどの電子回路などを利用して行なえるが、その指
令を実行Ｊるアクチェータ、すなわち燃料弁の開発が急
務となっている。It has been difficult to arbitrarily change the injection conditions (conditions such as fuel injection pressure, fuel injection start timing, period, etc.) in conventional diesel engine fuel injection devices. but,
In recent years, fuel injection control systems using electronic circuits that have been put into practical use are able to freely change fuel injection conditions, allowing for operation most suited to fuel oil properties, engine load, etc. The most important problem in this fuel injection control system is whether or not the fuel valve control can be operated at high speed as desired. Control commands for this purpose can be issued using electronic circuits such as computers, but there is an urgent need to develop an actuator, that is, a fuel valve, to execute the commands.
第１図は従来（米国特許４．１７６、６２４ ）の燃料
噴射弁制御装置であり、該装置は燃料弁３０と燃料弁制
御装置３１とにより構成されており、燃料弁制御装置３
１で電気信号を油圧３２に変更し、燃料噴射の制御を行
なっている。かかる従来例では、燃料弁制御器３１の内
部にばね３３と電磁石３４とを採用し、これらにより燃
料制御用のスプール弁３５を制御している。FIG. 1 shows a conventional fuel injection valve control device (US Pat. No. 4,176,624), which is composed of a fuel valve 30 and a fuel valve control device 31.
1 changes the electric signal to oil pressure 32 to control fuel injection. In this conventional example, a spring 33 and an electromagnet 34 are employed inside the fuel valve controller 31, and a spool valve 35 for fuel control is controlled by these.
しかし、この形式では電磁石３４の吸着力に限界がある
ことから、スプール弁３５の制御にも限界を生ずる難点
がある。たとえば、制御する燃料弁３０が大きくなった
場合、制御油の量も多くしなければならないＩＣめ、ス
プール弁３５も大きくなり、その質量も増加することか
ら、スプール弁２５の作動が遅くなり、適正な燃料噴射
の制御が困難になる、。However, in this type, there is a limit to the attraction force of the electromagnet 34, and therefore there is a drawback that there is also a limit to the control of the spool valve 35. For example, when the fuel valve 30 to be controlled becomes larger, the spool valve 35 also becomes larger and its mass increases due to the IC that requires a larger amount of control oil, which slows down the operation of the spool valve 25. Proper fuel injection control becomes difficult.
そのため、電磁石２４を大きくするなどの方法がとられ
るが、電磁石２４の大きさとその制御方法に限界を生ず
る。Therefore, methods such as increasing the size of the electromagnet 24 are taken, but there are limits to the size of the electromagnet 24 and the method of controlling it.
本発明は上記問題点を解決し得るディーゼル機関の燃料
噴射弁制御装置を提供するものである。The present invention provides a fuel injection valve control device for a diesel engine that can solve the above problems.
すなわち本発明は、燃料弁における油圧ビス１〜ンの油
圧ピストン上部室に制御油としての燃料油を供給する経
路中にスプール弁イ］ビス１〜ンを備えた燃料弁制御器
を設け、スプール弁の両端の一対のピストンの両端に作
動油を作用させる。作動油は方向切換弁または高速サー
ボ弁により切換えるが、方向切換弁または高速サーボ弁
への入力、すなわち電気信号は制御ユニットから出力す
る。方向切換弁を用いた場合、燃料弁は単んなる開閉し
かできないが、高速サーボ弁に変更することにより、サ
ーボ弁の電気信号をアナログ的に変化させることも可能
なことから、スプール弁の動ぎも細かく制御でき、従っ
て、燃料弁の開閉パターン、すなわち噴射パターンを変
更でき、なお一層の適正制御が可能となる。また、高速
サーボを用いた場合、入力する電圧、電流は微弱なもの
で良いため、増幅回路、制御回路も簡単となり、微弱信
号で油圧回路が制御でき大出力が得られる特徴をもつ。That is, the present invention provides a fuel valve controller equipped with spool valve screws 1 to 1 in a path for supplying fuel oil as control oil to the upper chamber of the hydraulic piston of the hydraulic screws 1 to 1 in the fuel valve. Hydraulic oil is applied to both ends of a pair of pistons at both ends of the valve. The hydraulic fluid is switched by a directional valve or a high-speed servo valve, and the input to the directional valve or high-speed servo valve, that is, the electrical signal, is output from the control unit. When using a directional valve, the fuel valve can only open and close, but by changing to a high-speed servo valve, it is also possible to change the servo valve's electrical signal in an analog manner, so the spool valve operation can be changed. Therefore, the opening/closing pattern of the fuel valve, that is, the injection pattern can be changed, and even more appropriate control is possible. Furthermore, when using a high-speed servo, the input voltage and current only need to be weak, so the amplification circuit and control circuit are simple, and the hydraulic circuit can be controlled with a weak signal and a large output can be obtained.
かかる構成によると、燃料弁制御器は油圧で駆動できる
ため、大きな力を得ることができ、従って高圧力、大容
量の制御油としての燃料油でも高速で切り換えることが
できる。また、その速度も高速サーボ弁を用いることに
よって変更できる。According to this configuration, since the fuel valve controller can be driven by hydraulic pressure, a large force can be obtained, and therefore even a high pressure, large volume of fuel oil as control oil can be switched at high speed. Also, the speed can be changed by using a high speed servo valve.
以下、本発明の一実施例を図面に基づいて説明する。第
２図において、ディーゼル機関の燃料噴射弁制御装置は
燃料弁１と、燃料弁制御器２と、制御ユニット（コンピ
ュータなど）３とから成り、制御ユニット３からの電気
信号ａを方向切換弁４に入力し、作動油すにより前記燃
料弁制御器２のスプール弁５を開閉させ、高圧の制御油
（燃料油）の制御を行ない、この高圧の制御油の有無に
よって燃料弁１からの燃料油Ｃの噴射が制御される。Hereinafter, one embodiment of the present invention will be described based on the drawings. In FIG. 2, the fuel injection valve control device for a diesel engine consists of a fuel valve 1, a fuel valve controller 2, and a control unit (such as a computer) 3. The hydraulic oil is used to open and close the spool valve 5 of the fuel valve controller 2 to control high-pressure control oil (fuel oil), and depending on the presence or absence of this high-pressure control oil, the fuel oil from the fuel valve 1 is controlled. The injection of C is controlled.
すなわちアキュ−ムレータロには常時高圧の燃料油Ｃが
高圧ポンプ７により満され、燃料弁１の入口孔８と燃料
弁制御器２の入口孔９とに導入されており、開弁時には
、燃料弁１の油圧ピストン−ト部室１０に燃料弁制御器
２からの油圧Ｃ−を掛け−４、油圧ピストン１１を押し
下げているが、反面、油圧ピストン上部室１０の油圧Ｃ
−を低下させると、ニードル弁１２の下方にあるノズル
室１３のアキュームレータ６からの高圧の燃料油Ｃの圧
力ににって該ニードル弁１２が上昇し、シート部１４が
開いてアキュームレータ６からの燃料油Ｃを噴射する。That is, the accumulator tank is always filled with high-pressure fuel oil C by the high-pressure pump 7, and introduced into the inlet hole 8 of the fuel valve 1 and the inlet hole 9 of the fuel valve controller 2. Hydraulic pressure C- from the fuel valve controller 2 is applied to the hydraulic piston chamber 10 of No. 1 to push down the hydraulic piston 11, but on the other hand, the hydraulic pressure C of the hydraulic piston upper chamber 10
- is lowered, the needle valve 12 is raised by the pressure of the high pressure fuel oil C from the accumulator 6 in the nozzle chamber 13 located below the needle valve 12, the seat part 14 is opened, and the pressure from the accumulator 6 is lowered. Inject fuel oil C.
したがって燃料弁１の開閉は、油圧ピストン上部室１０
への燃料弁制御器２からの油圧Ｃ′で制御される。Therefore, the opening and closing of the fuel valve 1 is controlled by the hydraulic piston upper chamber 10.
is controlled by oil pressure C' from the fuel valve controller 2.
ここで、燃料弁ル制御器２のスプール弁５はその両端に
ビスｉ〜ン１５ａ、 １５ｂを固定されており、この２
つのピストン１５ａ、 １５ｂに作用する作動油を交ｎ
に方向切換弁４で切り換えることによりスプール弁５を
作動させ、油圧ビス［−ン上部室１０に対する油圧Ｃ′
を制御するものである。燃料弁制御器２および方向切換
弁４で用いられる作動油は一般油圧用のものであり、作
動油アキコームレータ１６、作動油油圧ポンプ１７を介
して供給される。なお、方向切換弁に替えて高速サーボ
弁を使用することもできる。Here, the spool valve 5 of the fuel valve controller 2 has screws 15a and 15b fixed to both ends thereof.
Exchange the hydraulic oil acting on the two pistons 15a and 15b.
The spool valve 5 is actuated by switching the directional control valve 4 to
It controls the The hydraulic oil used in the fuel valve controller 2 and the directional control valve 4 is for general hydraulic pressure, and is supplied via a hydraulic oil combulator 16 and a hydraulic oil hydraulic pump 17. Note that a high-speed servo valve may be used instead of the directional control valve.
燃料弁制御器２は作動油のハー力を一次的な力としてい
るため、大容量で高速なものを製作づ゛ることが可能と
なり、しかも、方向切換弁４を通じて電気信号で制御で
きるという特徴をもつ。なａ３、方向切換弁は甲なる０
Ｎ−ＯＦＦ制御にしかできないが、高速サーボ弁を利用
した場合はスプール弁５の位置を制御し得ることから、
なお一層の細かい制御、たとえば噴射パターンの変更な
どの制御できる。Since the fuel valve controller 2 uses the hydraulic oil's Herr force as its primary force, it is possible to manufacture a large-capacity, high-speed device, and it also has the feature that it can be controlled by electrical signals through the directional control valve 4. have. A3, the directional control valve is 0
Although only N-OFF control is possible, if a high-speed servo valve is used, the position of the spool valve 5 can be controlled.
Furthermore, even more detailed control, such as changing the injection pattern, is possible.
第３図Ａ、Ｂは方向切換弁を使用した場合の切換弁への
入力信号および噴射パターンを説明づる特性図を示す。FIGS. 3A and 3B show characteristic diagrams illustrating the input signal to the directional control valve and the injection pattern when the directional control valve is used.
第４図Ａ、Ｂは高速サーボ弁を使用した場合のサーボ弁
への入力信号および噴射パターンを説明する特性図を示
し、その入力信号を変更して噴射パターンを変更し、燃
焼の改善を図ったものである。Figures 4A and 4B show characteristic diagrams explaining the input signal to the servo valve and injection pattern when a high-speed servo valve is used, and the injection pattern is changed by changing the input signal to improve combustion. It is something that
燃料弁制御器２においては、燃料油と作動油が混在して
使用されているが、一般に燃料油の圧力の方が作動油の
圧力より高くして使用されることが多く、そのため、燃
料油が作動油に混じり、作動油の劣化、汚染をひきＪ５
こし、作動油のために良くない。そのため、第２図に示
すよう、燃料弁制御器２には、スプール弁５の逃しｆｉ
１８ａ、 １８ｂに直結する逃し孔１９ａ、１９ｂを設
け、燃料油と作動油とをそれぞれ分離してドレンとして
回収できるにう構成されており、燃料油は逃し溝１９ａ
を通じて、作動油は逃し孔１９ｂを通じて回収される。In the fuel valve controller 2, a mixture of fuel oil and hydraulic oil is used, but the pressure of the fuel oil is generally higher than that of the hydraulic oil. is mixed with the hydraulic oil, causing deterioration and contamination of the hydraulic oil.
Strain, not good for hydraulic fluid. Therefore, as shown in FIG. 2, the fuel valve controller 2 has a relief fi of the spool valve 5.
Relief holes 19a and 19b are provided which are directly connected to the recesses 18a and 18b, and the fuel oil and hydraulic oil are separated and collected as drains.
The hydraulic oil is recovered through the relief hole 19b.
なお、前記においては作動油と燃料油の２種の油を用い
た例を述べたが、燃料一種を用いて作動油の代りをさせ
ることもできる。この場合、燃料油アキュームレータ６
に減圧弁をいれた油圧ラインを方向切換弁または高速サ
ーボ弁４に導く。このように配置づ−ることにより、作
動油ポンプ１７、作動油アキュームレータ１Ｇの不要、
逃し満１８８゜１８ｂと逃し孔１９ａ、１９ｂの省略
による燃料弁制御器２の簡略化が計れる。Although the above example uses two types of oil, hydraulic oil and fuel oil, it is also possible to use one type of fuel instead of the hydraulic oil. In this case, the fuel oil accumulator 6
A hydraulic line containing a pressure reducing valve is led to a directional control valve or high-speed servo valve 4. By arranging it in this way, the hydraulic oil pump 17 and the hydraulic oil accumulator 1G are unnecessary.
The fuel valve controller 2 can be simplified by omitting the relief hole 188° 18b and the relief holes 19a and 19b.
さらに、上述した燃料噴射側り１）を向上させるために
、燃料弁１内に設けられたセン１ノー（変位計）２０を
用いて油圧ピストン１１の作動を計測し、その計測信号
をフィードバック信号ｄとして制御ユニット３へ入力し
、フィードバック制ｉすることにより、ニードル弁１２
の作動を把握でき、最適噴射が実施できる。ここで油圧
ピストン１１とニードル弁１２とはほぼ同じ挙動をする
ので、油圧ビス１〜ン１１の動きはニードル弁１２の挙
動として見なすことができる。ｅは燃料弁開閉時期の設
定入力を示す。Furthermore, in order to improve the above-mentioned fuel injection side 1), the operation of the hydraulic piston 11 is measured using a sensor (displacement meter) 20 provided in the fuel valve 1, and the measurement signal is used as a feedback signal. By inputting it to the control unit 3 as d and performing feedback control i, the needle valve 12
operation can be understood and optimal injection can be carried out. Here, since the hydraulic piston 11 and the needle valve 12 behave almost in the same way, the movement of the hydraulic screws 1 to 11 can be regarded as the behavior of the needle valve 12. e indicates a setting input for the fuel valve opening/closing timing.
以上本発明によれば、燃料弁制御器は作動油の油圧で駆
動でさるため、大きな力を得ることができ、従って制御
油としての高圧力、大容量の燃料油であっても、高速で
切り換えることができる。As described above, according to the present invention, since the fuel valve controller is driven by the hydraulic pressure of the hydraulic oil, a large force can be obtained. Can be switched.
また、スプール弁（こ油の逃し溝を、制御器本体に前記
逃し溝に直結覆る逃し孔を設けたので１燃料弁制御器で
使用される燃料油と作動油との混じり合いは防止される
。In addition, since a relief hole is provided in the controller body that directly connects and covers the spool valve oil relief groove, mixing of the fuel oil used in the fuel valve controller and the hydraulic oil is prevented. .
第１図は従来例を示す縦断面正面図、第２図１．１本発
明の一実施例を示す！断面正面図、第３図Ａ。
Ｂおよび第４図△、Ｂはそれぞれ方向切換弁Ｊ３よび高
速リーボ弁を使用した場合の特性図である。
１・・・燃料弁、２・・・燃料弁制御器、３・・・制御
コーニット、４・・・方向切換弁または高速サーボ弁、
５・・・スプール弁、６・・・燃料油アキュームレータ
、７・・・燃才３１油高Ｌ１ポンプ、１１・・・油圧ビ
ス１〜ン、１２・・・ニードル弁、１３・・・ノズル室
、１５・・・ピストン、１６・・・作業油）７キー７−
ムレータ、１７・・・作動油ポンプ、 １８ａ１１８ｂ
・・・逃し溝、１９ａ、 １９ｂ・・・逃し孔代理人
森 木 義 弘
第３図
７な
第４図
１１１／１Fig. 1 is a longitudinal sectional front view showing a conventional example, and Fig. 2 shows an embodiment of the present invention! Cross-sectional front view, Figure 3A. B and FIGS. 4A and 4B are characteristic diagrams when the directional control valve J3 and the high-speed ribo valve are used, respectively. DESCRIPTION OF SYMBOLS 1... Fuel valve, 2... Fuel valve controller, 3... Control Cornit, 4... Directional switching valve or high-speed servo valve,
5... Spool valve, 6... Fuel oil accumulator, 7... Fuel oil height 31 oil height L1 pump, 11... Hydraulic screw 1~n, 12... Needle valve, 13... Nozzle chamber , 15...piston, 16...work oil) 7 key 7-
Mulator, 17... Hydraulic oil pump, 18a118b
...Relief groove, 19a, 19b...Relief hole agent
Yoshihiro Moriki Figure 3 7 Figure 4 111/1
Claims (1)
行なう燃料噴射弁の制御装置において、前記油圧ピスト
ンに作用させる燃料油の圧力の制御をするスプール回付
ビスｉ〜ンを備えた燃料弁制御器を設け、前記燃料弁制
御器のスプール付きピストンの制御を別系統の作動油を
用いて行なう方向切換弁または高速サーボ弁を設けたこ
とを特徴とする燃料噴射弁制御装置。 ２、燃料制御器内で使用される作動油および燃料油の混
じり合いを防止するだめの油の逃し溝およびそれに直結
する逃し孔をスプール弁および制御器本体に設けたこと
を特徴とする特許請求の範囲１記載の燃料噴射弁制御Ｉ
ＩＩ装置。[Scope of Claims] 1. In a control device for a fuel injection valve in which the opening and closing of the fuel valve is performed by a hydraulic piston in the fuel valve, there is provided a spool rotation for controlling the pressure of fuel oil acting on the hydraulic piston. The present invention is characterized in that it is provided with a fuel valve controller equipped with a screwdriver, and a directional switching valve or a high-speed servo valve that controls a piston with a spool of the fuel valve controller using hydraulic oil from a separate system. Fuel injection valve control device. 2. A patent claim characterized in that the spool valve and the controller body are provided with a reservoir oil relief groove and a relief hole directly connected thereto to prevent mixing of hydraulic oil and fuel oil used in the fuel controller. Fuel injection valve control I according to range 1 of
II device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6591383A JPS59190468A (en) | 1983-04-13 | 1983-04-13 | Control device of fuel injection valve in diesel engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6591383A JPS59190468A (en) | 1983-04-13 | 1983-04-13 | Control device of fuel injection valve in diesel engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59190468A true JPS59190468A (en) | 1984-10-29 |
| JPH031506B2 JPH031506B2 (en) | 1991-01-10 |
Family
ID=13300682
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6591383A Granted JPS59190468A (en) | 1983-04-13 | 1983-04-13 | Control device of fuel injection valve in diesel engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59190468A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5631656U (en) * | 1979-08-17 | 1981-03-27 | ||
| JPS5813745A (en) * | 1981-07-15 | 1983-01-26 | 帝人株式会社 | Production of hard twisted creped fabric |
| JPS5820959A (en) * | 1981-07-30 | 1983-02-07 | Diesel Kiki Co Ltd | Valve device for controlling supply of pressurized fuel to pressure booster for fuel injection device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| IT1046960B (en) * | 1975-08-05 | 1980-09-10 | Deneb Sa | VOLAND CAPSTAN BRONZE COMPLEX FOR GIRANASTRI |
-
1983
- 1983-04-13 JP JP6591383A patent/JPS59190468A/en active Granted
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5631656U (en) * | 1979-08-17 | 1981-03-27 | ||
| JPS5813745A (en) * | 1981-07-15 | 1983-01-26 | 帝人株式会社 | Production of hard twisted creped fabric |
| JPS5820959A (en) * | 1981-07-30 | 1983-02-07 | Diesel Kiki Co Ltd | Valve device for controlling supply of pressurized fuel to pressure booster for fuel injection device |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH031506B2 (en) | 1991-01-10 |
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