JPS5925073A - Precise injection valve - Google Patents
Precise injection valveInfo
- Publication number
- JPS5925073A JPS5925073A JP13380682A JP13380682A JPS5925073A JP S5925073 A JPS5925073 A JP S5925073A JP 13380682 A JP13380682 A JP 13380682A JP 13380682 A JP13380682 A JP 13380682A JP S5925073 A JPS5925073 A JP S5925073A
- Authority
- JP
- Japan
- Prior art keywords
- injection
- valve
- fuel
- pressure
- pressure accumulator
- 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
- F02M51/00—Fuel-injection apparatus characterised by being operated electrically
- F02M51/06—Injectors peculiar thereto with means directly operating the valve needle
- F02M51/061—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means
- F02M51/0625—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures
- F02M51/0664—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a cylindrically or partly cylindrically shaped armature, e.g. entering the winding; having a plate-shaped or undulated armature entering the winding
- F02M51/0671—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a cylindrically or partly cylindrically shaped armature, e.g. entering the winding; having a plate-shaped or undulated armature entering the winding the armature having an elongated valve body attached thereto
- F02M51/0675—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a cylindrically or partly cylindrically shaped armature, e.g. entering the winding; having a plate-shaped or undulated armature entering the winding the armature having an elongated valve body attached thereto the valve body having cylindrical guiding or metering portions, e.g. with fuel passages
- F02M51/0678—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a cylindrically or partly cylindrically shaped armature, e.g. entering the winding; having a plate-shaped or undulated armature entering the winding the armature having an elongated valve body attached thereto the valve body having cylindrical guiding or metering portions, e.g. with fuel passages all portions having fuel passages, e.g. flats, grooves, diameter reductions
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
Description
【発明の詳細な説明】
この発明は燃料の精密噴射弁に関する。従来から、ソレ
ノイドの吸引力によって燃料流量を制御し、内燃機関の
燃焼特性を改善する噴射弁は、その小形、高性能な特性
のため広く使われている。DETAILED DESCRIPTION OF THE INVENTION This invention relates to a precision fuel injection valve. BACKGROUND ART Injectors that improve the combustion characteristics of internal combustion engines by controlling the fuel flow rate using the suction force of a solenoid have been widely used due to their small size and high performance.
さらに燃料の噴射後の気化特性や噴射特性の改良のため
噴射圧を高めたり、三方式の噴射弁を用うろことなどが
考案されて来たが、配管系の圧力伝播特性のため、高速
で供給−遮断をくりかえすと。Furthermore, in order to improve the vaporization characteristics and injection characteristics after fuel injection, methods such as increasing the injection pressure and using three types of injection valves have been devised, but due to the pressure propagation characteristics of the piping system, high-speed If the supply-cutoff is repeated.
噴射量と弁開閉時間巾が比例しなくなることが知られて
いる。It is known that the injection amount and the valve opening/closing time are not proportional.
この発明は、内燃機関の燃料噴射弁において。The present invention relates to a fuel injection valve for an internal combustion engine.
燃料供給ポンプから噴射弁までの配管内の液体の動特性
（圧力波伝播特性）や多気箇条噴射弁間の噴射圧力特性
の相互干渉によって、噴射燃料流量の精度悪化を防止す
るため、噴射弁内部に蓄圧器な設け、噴射量精度を向上
することＫよって、内燃機関の燃費と排出ガスの清浄化
を向上することをその目的とし、燃料流路中に設けた蓄
圧器によって弁の急開閉時の圧力変化を吸収させること
によって噴射量の精度を向上しようとするものである。In order to prevent the accuracy of the injected fuel flow rate from deteriorating due to mutual interference between the dynamic characteristics (pressure wave propagation characteristics) of the liquid in the piping from the fuel supply pump to the injection valve and the injection pressure characteristics between the multiple injection valves, The purpose is to improve the fuel efficiency of the internal combustion engine and the cleanliness of exhaust gas by installing a pressure accumulator in the fuel flow path and improving the accuracy of the injection amount. The aim is to improve the accuracy of the injection amount by absorbing pressure changes.
図について説明すれば、第１図は第一の実施例を示し、
噴射弁１０は、固定磁気回路（Ｌｋ燃料パイプ取付部２
が固たれ１両者を通して燃料通路３があけられている。To explain the figures, FIG. 1 shows a first embodiment,
The injection valve 10 has a fixed magnetic circuit (Lk fuel pipe attachment part 2
are solidified, and a fuel passage 3 is opened through both.
固定磁気回路１中にソレノイドコイル４が設けられ、又
はね５を介して固定磁気回路ＩＫ吸引される可動ピスト
ン７が取りつけられ、このピストン７に板８．弁軸９．
支持体１１等が取り付けられて可動弁６を形成し、弁胴
１３中を前後に摺動する・弁軸の先端は針弁１２として
形成され、噴射口１４と組み合されている。A solenoid coil 4 is provided in the fixed magnetic circuit 1, or a movable piston 7 is attached via a spring 5 to which the fixed magnetic circuit IK is attracted, and a plate 8. Valve shaft 9.
A support 11 and the like are attached to form a movable valve 6, which slides back and forth in a valve body 13.The tip of the valve shaft is formed as a needle valve 12 and is combined with an injection port 14.
１５は板８を係止するストローク制限体である。15 is a stroke limiter that locks the plate 8.
１７は固定磁気回路と可動ピストンとの間の間隙。17 is a gap between the fixed magnetic circuit and the movable piston.
１６は蓄圧器であって流路１８内に設けられている。蓄
圧器はＯリング状のぜム袋に窒素ガスを封入したもので
ある。16 is a pressure accumulator and is provided in the flow path 18. The pressure accumulator is an O-ring shaped bag filled with nitrogen gas.
燃料は燃料供給ポンプから送られてきて、矢印Ｆの如く
流入する。ソレノイドコイルを付勢して可動ピストンが
右に引っばられると、可動弁６も右に動き、弁針１２が
開き、燃料は通路３、隙間１７、弁胴内の流路１９を経
て噴射口１４から噴射される。ソレノイドコイルの付勢
なやめれば可動ピストン７はばね５で左方に押し戻され
、針弁１２も左に動き噴射口１４を閉じる。しかしてこ
れらの燃料流路内の圧力変動は蓄圧器１６で吸収される
・
第２図は噴射口閉鎖時は燃料を戻す三方弁形式の第二の
実施例を示すものである。この噴射弁２０は外側の枠体
２１で構成され、それに燃料送入パイプ取付部２２及び
燃料戻しパイプ取付部２３が夫々形成されている。２４
は固定磁気回路であり、それにソレノイドコイル２６が
取りつけられている。更に固定磁気回路２４の中央に固
定磁気回路兼ストッパー２５が取りつけられ、それにば
ね２７を介して可動磁気回路２８が取２つげられている
・枠体２１の先端の噴射口３１を開閉するボール弁２９
は可）磁気回路２８と一体でもよ（、又別体であっても
、いずれでもよい。Fuel is sent from the fuel supply pump and flows in as shown by arrow F. When the solenoid coil is energized and the movable piston is pulled to the right, the movable valve 6 also moves to the right, the valve needle 12 opens, and the fuel passes through the passage 3, gap 17, and flow path 19 in the valve body to the injection port. It is injected from 14. When the solenoid coil is no longer energized, the movable piston 7 is pushed back to the left by the spring 5, and the needle valve 12 also moves to the left to close the injection port 14. Therefore, these pressure fluctuations in the fuel flow path are absorbed by the pressure accumulator 16. Fig. 2 shows a second embodiment of the three-way valve type in which fuel is returned when the injection port is closed. The injection valve 20 is composed of an outer frame body 21, on which a fuel feed pipe attachment portion 22 and a fuel return pipe attachment portion 23 are formed, respectively. 24
is a fixed magnetic circuit to which a solenoid coil 26 is attached. Furthermore, a fixed magnetic circuit/stopper 25 is attached to the center of the fixed magnetic circuit 24, and a movable magnetic circuit 28 is attached to it via a spring 27. A ball valve opens and closes the injection port 31 at the tip of the frame 21. 29
(Acceptable) It may be integrated with the magnetic circuit 28 (or may be separate).
燃料は燃料供給ポンプから矢印Ｆで示す如（送られて来
て、枠体２１と固定磁気回路２４との間の燃料通路２９
に入り、燃料の一部は固定磁気回路２４と可動磁気回路
２８との間の戻り通路３７゜及びその延長の固定磁気回
路兼ストツノで−２５の外側の通路３５を通り固定磁気
回路兼ストッパー２５にあけられたスリット３６を通っ
て戻り通路３８に入る。The fuel is sent from the fuel supply pump as shown by arrow F and flows through the fuel passage 29 between the frame 21 and the fixed magnetic circuit 24.
A part of the fuel passes through the return passage 37° between the fixed magnetic circuit 24 and the movable magnetic circuit 28 and the passage 35 outside the fixed magnetic circuit/stopper 25 extending from the fixed magnetic circuit/stopper 25. It enters a return passage 38 through a slit 36 made in the.
燃料の噴射及び遮断を行なうには、ソレノイドコイル２
６を付勢したり解除したりする０即ちソレノイドコイル
２６を付勢すれば可動磁気回路２８は右方に吸引され、
ばね２７に抗して右方に移動し、ボール弁２９も右方に
移動して噴射口３１は開き、又可動磁気回路２８は固定
磁気回路兼ストッパー２５に密接し１両者間の隙間３４
を閉じ、燃料は噴射される。ソレノイドコイル２６の付
勢が解除されると、可動磁気回路２８ばばね２７によっ
て左方に押し戻され、ボール弁２９は噴射口を閉じ、可
動磁気回路２８と固定磁気回路兼ストッパー２５の間の
隙間３４が開くので、燃料は流路３０から可動磁気回路
内のスリット３２を経て可動磁気回路内の通路３３に入
り、隙間３４によって通路３５に入り、スリット３６を
経て戻り通路３８によって、矢印Ｒで示す如く還流する
〇
この実施例においても同様に蓄圧器３９が流路３０内に
設けられている。やはりＯリング状のゴム袋に窒素ガス
を封入したものであって、燃料の噴射時と、還流時の圧
力変動を吸収する。To inject and cut off fuel, solenoid coil 2
When the solenoid coil 26 is energized, the movable magnetic circuit 28 is attracted to the right.
It moves to the right against the spring 27, the ball valve 29 also moves to the right, and the injection port 31 opens, and the movable magnetic circuit 28 comes into close contact with the fixed magnetic circuit/stopper 25, and the gap 34 between the two is closed.
is closed and fuel is injected. When the solenoid coil 26 is deenergized, the movable magnetic circuit 28 is pushed back to the left by the spring 27, the ball valve 29 closes the injection port, and the gap between the movable magnetic circuit 28 and the fixed magnetic circuit/stopper 25 is closed. 34 is opened, the fuel enters the passage 33 in the movable magnetic circuit from the flow path 30 through the slit 32 in the movable magnetic circuit, enters the passage 35 through the gap 34, passes through the slit 36 and returns through the return passage 38 in the direction of arrow R. As shown, reflux occurs. In this embodiment as well, a pressure accumulator 39 is provided in the flow path 30. It is also an O-ring-shaped rubber bag filled with nitrogen gas, which absorbs pressure fluctuations during fuel injection and reflux.
第３図は噴射量の比較を示し、たて軸に噴射量Ｑを、横
軸に周波数ｌｏｇωをとっである０図で実線Ａは蓄圧器
を具えたこの発明の噴射弁の場合を示し、点線Ｂは従来
の噴射弁の場合を夫々示す。Fig. 3 shows a comparison of injection quantities, with the injection quantity Q on the vertical axis and the frequency logω on the horizontal axis. Dotted line B shows the case of a conventional injection valve.
内因でｏ−４０はエンジン回転領域を示している。Due to internal reasons, o-40 indicates the engine rotation range.
又第４図に横軸に時間ｔをとり、負荷率は等しいが周波
数の異なる二種の入力信号Ａ、Ｂを示している。このよ
うに負荷率が等しい場合周波数が変っても噴射量が一定
であることが望まれるわけであるが、この発明の噴射弁
はエンジンの高速回転まで正確な制御を可能にするもの
である。Also, in FIG. 4, time t is plotted on the horizontal axis, and two types of input signals A and B having the same load factor but different frequencies are shown. In this way, when the load factor is the same, it is desired that the injection amount be constant even if the frequency changes, and the injection valve of the present invention enables accurate control even at high speed rotation of the engine.
この発明の精密噴射弁はこのような構成であるが、ボー
ルと可動磁気回路は一体でも別体でもよく、又ポールで
な（ともよい０従来燃料ポンプと噴射弁の間にはレギュ
レーターがあって燃圧を一定にしていたがこのレギュレ
ーターでは完全に液体の動特性などを吸収することはで
きない。この発明では噴射弁の出口附近で吸収するので
非常に効果的である。The precision injection valve of the present invention has such a configuration, but the ball and the movable magnetic circuit may be integrated or separate, and may not be a pole. Although the fuel pressure was kept constant, this regulator cannot completely absorb the dynamic characteristics of the liquid.This invention is very effective because it absorbs it near the outlet of the injection valve.
第１図はこの発明の噴射弁の第一の実施例の側断面図、
第２図は同じ（第二の実施例の側断面図、第３図は噴射
量の比較図、第４図は二種の入力信号を示す図を夫々示
す図である。
符号の説明
１−ｍ−固定磁気回路、２−一一パイブ取付部、３−ｍ
−燃料通路、４−−−ソレノイドコイル、５−ｍ−もど
りばね、６一−−可動升、７−−−可動磁気回路、８−
一一板、９−−−升軸、１０−ｍ−弁体、１１−−−支
持体、１２−−−針弁、１３−−一弁胴、１４−ｍ−噴
射口、１５−ｍ−ストローク制限体、１６−−−蓄圧器
。
１７一−−隙間、１８．１９−−一流路、２０−一一弁
体、２１−−−枠体、２２，２３−−−パイプ取付部、
２４−ｍ−固定磁気回路、２５−一一ソレノイト９コイ
ル、２７−−−ばね、２８−ｍ−可動磁気回路、２９．
３０−−一燃料通路、３１−ｍ−噴射０．３２−−−ス
リット、３３−一一可動磁、気回路内うｍ路；ｉ４’、
ニー−隙間。
３５−ｍ−通路、３６−−−スリツト。
３７．３８−−一通路、３９−−−蓄圧器。FIG. 1 is a side sectional view of a first embodiment of the injection valve of the present invention;
Figure 2 is the same (a side sectional view of the second embodiment, Figure 3 is a comparison diagram of injection amounts, and Figure 4 is a diagram showing two types of input signals. Explanation of symbols 1- m-Fixed magnetic circuit, 2-11 pipe mounting part, 3-m
-Fuel passage, 4---Solenoid coil, 5-m-Return spring, 61--Movable box, 7--Movable magnetic circuit, 8-
11 plate, 9--square shaft, 10-m-valve body, 11--support body, 12--needle valve, 13--one valve body, 14-m-injection port, 15-m- Stroke limiter, 16---Pressure accumulator. 17--Gap, 18.19--Air passage, 20--Valve body, 21--Frame body, 22, 23--Pipe attachment part,
24-m-fixed magnetic circuit, 25-11 solenoid 9 coils, 27--spring, 28-m-movable magnetic circuit, 29.
30--fuel passage, 31-m-injection 0.32--slit, 33-11 movable magnet, m path in air circuit; i4',
Knee-gap. 35-m-Aisle, 36--Slit. 37.38--One passage, 39--Pressure accumulator.
Claims (1)
路と、磁気回路によって吸引される可動部を有し、この
可動部の動きＫよって供給燃料を電磁的に供給−遮断す
る噴射弁において、噴射弁内の燃料流路内に蓄圧器をも
うけたことを特徴とする燃料の精密噴射弁。In an injection valve that has a solenoid coil, a magnetic circuit excited by the coil, and a movable part that is attracted by the magnetic circuit, the fuel is electromagnetically supplied and cut off by the movement K of the movable part. A precision fuel injection valve characterized by having a pressure accumulator in the fuel flow path.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13380682A JPS5925073A (en) | 1982-08-02 | 1982-08-02 | Precise injection valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13380682A JPS5925073A (en) | 1982-08-02 | 1982-08-02 | Precise injection valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5925073A true JPS5925073A (en) | 1984-02-08 |
Family
ID=15113467
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13380682A Pending JPS5925073A (en) | 1982-08-02 | 1982-08-02 | Precise injection valve |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5925073A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1275841A1 (en) * | 2001-07-10 | 2003-01-15 | Delphi Technologies, Inc. | Fuel injector with integral damper |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52112020A (en) * | 1976-03-15 | 1977-09-20 | Mashine Terumitsukusu Esu Ii E | Liquid fuel injection device |
-
1982
- 1982-08-02 JP JP13380682A patent/JPS5925073A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52112020A (en) * | 1976-03-15 | 1977-09-20 | Mashine Terumitsukusu Esu Ii E | Liquid fuel injection device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1275841A1 (en) * | 2001-07-10 | 2003-01-15 | Delphi Technologies, Inc. | Fuel injector with integral damper |
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