JPS591105Y2 - Fuel injection device for internal combustion engines - Google Patents
Fuel injection device for internal combustion enginesInfo
- Publication number
- JPS591105Y2 JPS591105Y2 JP9506878U JP9506878U JPS591105Y2 JP S591105 Y2 JPS591105 Y2 JP S591105Y2 JP 9506878 U JP9506878 U JP 9506878U JP 9506878 U JP9506878 U JP 9506878U JP S591105 Y2 JPS591105 Y2 JP S591105Y2
- Authority
- JP
- Japan
- Prior art keywords
- fuel injection
- fuel
- injection device
- air
- 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)
Description
【考案の詳細な説明】
本考案は電磁燃料噴射弁を備えた内燃機関用燃料噴射装
置に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a fuel injection device for an internal combustion engine equipped with an electromagnetic fuel injection valve.
吸気通路に電磁燃料噴射弁を備えていて、別に備えられ
ているコントロールユニットがらの信号で電磁燃料噴射
弁が開・閉して燃料を噴射供給するようになされた燃料
噴射装置は、電磁燃料噴射弁の動作が、開・閉、動作の
ため、燃料流が間欠となる。A fuel injection device that is equipped with an electromagnetic fuel injection valve in the intake passage and injects and supplies fuel by opening and closing the electromagnetic fuel injection valve according to signals from a separately provided control unit is called an electromagnetic fuel injection system. The fuel flow is intermittent as the valve opens and closes.
また、アイドリング運転時のように軽負荷時には、機関
の１運転サイクル中のほんのわずかな時間に全必要燃料
が供給されるが吸気通路中の混合気は濃淡の連続となり
、気筒分配が著しく低下するという不具合が発生する。In addition, when the load is light, such as during idling, all the necessary fuel is supplied in a very short period of time during one operating cycle of the engine, but the air-fuel mixture in the intake passage becomes continuously rich and light, resulting in a significant drop in cylinder distribution. This problem occurs.
これを防止するため、電磁燃料噴射弁から噴射された燃
料に旋回空気を与えることか゛考えられている。In order to prevent this, it has been considered to provide swirling air to the fuel injected from the electromagnetic fuel injection valve.
しかしながら、この方法だと充分細かい燃料粒子を形成
することが困難であり、燃料粒子が再び凝縮する問題が
ある。However, with this method, it is difficult to form sufficiently fine fuel particles, and there is a problem that the fuel particles may condense again.
本考案の目的は燃料粒子を充分細かくして燃料粒子が凝
縮するのを極力少なくできる燃料噴射装置を提係するに
ある。An object of the present invention is to provide a fuel injection device that can make the fuel particles sufficiently fine to minimize condensation of the fuel particles.
本考案の特徴は電磁燃料噴射弁の出口と吸気通路を多孔
質の管体で連通して燃料がこの管体の内部を通過するよ
うにすると共に多孔質の管体の外部に空気が流入してく
る空間を設けこの空間から空気を多孔質部分を通して管
体内部に導き燃料を微粒化するものである。The feature of this invention is that the outlet of the electromagnetic fuel injection valve and the intake passage are connected through a porous tube so that fuel passes through the inside of the tube and air flows into the outside of the porous tube. The fuel is atomized by providing a space in which the air flows through the porous part and into the inside of the tube.
以下、図により詳細に説明する。This will be explained in detail below with reference to the drawings.
第１図は本考案の一実施例を示す断面図で、本体１には
吸気通路２が形成され、内部に絞弁６があり吸入空気量
のコントロールがされる。FIG. 1 is a sectional view showing an embodiment of the present invention.A main body 1 has an intake passage 2 formed therein, and a throttle valve 6 inside to control the amount of intake air.
吸気通路２の上部にはベンチュリ部３があり、ベンチュ
リ部３にはスリット状に開口したバイパス通路４が設け
られ、そのバイパス通路途中には、感熱抵抗５が設置さ
れている。There is a venturi section 3 in the upper part of the intake passage 2, a bypass passage 4 having a slit-like opening is provided in the venturi part 3, and a heat-sensitive resistor 5 is installed in the middle of the bypass passage.
この感熱抵抗５はバイパス通路４を流れる空気流速にほ
ぼ比例した電気出力が得られるように、コントロールユ
ニットに接続される。This heat-sensitive resistor 5 is connected to a control unit so that an electrical output approximately proportional to the air flow rate flowing through the bypass passage 4 is obtained.
絞弁６の下流には多孔質の管体９で形成された燃料通路
８があり、その軸線後方には電磁燃料噴射弁７が設置さ
れている。There is a fuel passage 8 formed of a porous pipe body 9 downstream of the throttle valve 6, and an electromagnetic fuel injection valve 7 is installed behind the axis thereof.
管体９の外周には空間１０が設けられており、これは空
気通路１１を介して絞弁６の上流と連通している。A space 10 is provided on the outer periphery of the tube body 9, and this space 10 communicates with the upstream side of the throttle valve 6 via an air passage 11.
電磁燃料噴射弁７は前記した感熱抵抗５で空気流量に応
じた信号を得たコントロールユニットがそれをベースに
適当な演算処理をして、電磁燃料噴射弁７へ信号を送る
。In the electromagnetic fuel injection valve 7, the control unit obtains a signal corresponding to the air flow rate through the heat-sensitive resistor 5 described above, performs appropriate arithmetic processing based on the signal, and sends the signal to the electromagnetic fuel injection valve 7.
電磁燃料噴射弁７が動作すると加圧された燃料１２は噴
口から傘状に広がって噴出する。When the electromagnetic fuel injection valve 7 operates, the pressurized fuel 12 spreads out from the nozzle in an umbrella shape and is ejected.
噴霧の１部は管体９の内壁に耐着して吸気通路２に吸込
まれる。A portion of the spray adheres to the inner wall of the pipe body 9 and is sucked into the intake passage 2.
このとき空気通路１１からの空気は空間１０で流速が緩
和され、しかも多孔質の管体９の外周から多孔質部分を
通って流入するため、燃料通路８を直進する噴霧を曲げ
て壁面に耐着する量を増加させることがない。At this time, the flow velocity of the air from the air passage 11 is moderated in the space 10, and since it flows from the outer periphery of the porous pipe body 9 through the porous portion, the spray traveling straight through the fuel passage 8 is bent, causing the air to flow against the wall surface. It does not increase the amount of wear.
同時に、空気が管体９の外周から流入するため、耐着し
た燃料の吹飛ばし効果がすぐれ燃料を充分細かくできる
という効果が得られる。At the same time, since air flows in from the outer periphery of the tube body 9, the effect of blowing away the stuck fuel is excellent and the fuel can be made into sufficiently fine particles.
第２図は、本考案の他の実施例を示す断面図で前記第１
図と異なる点は空間１０を多孔質の管体９自身に設けて
多孔質の管体９の挿入がしやすい構造とした点である。FIG. 2 is a sectional view showing another embodiment of the present invention.
The difference from the figure is that the space 10 is provided in the porous tube 9 itself, making it easy to insert the porous tube 9.
第３図は本考案の他の実施例で、前記第１図と異なる点
は、補助空気通路１１を燃料噴射孔１３の上流に位置す
る空間１０に開口するような構造とした点であり、これ
によると、燃料噴射孔１３の周囲に存在する多孔質の管
体９から空気が導入されるため、燃料の噴霧方向を変え
るような影響は全くなく、非常に安定した流れが得られ
る。FIG. 3 shows another embodiment of the present invention, which differs from FIG. 1 in that the auxiliary air passage 11 is structured to open into a space 10 located upstream of the fuel injection hole 13. According to this, since air is introduced from the porous pipe body 9 existing around the fuel injection hole 13, there is no effect of changing the direction of fuel spray, and a very stable flow can be obtained.
また、空気も多孔質の部分を通をため燃料の吹きとばし
効果もすぐれている。In addition, air also passes through the porous portions, resulting in an excellent fuel blowing effect.
第４図は本考案の他の実施例を示す断面図で、前記第３
図と異なるところは、多孔質物体９の先端部を閉塞し、
袋状にした点で、噴出燃料が直接吸気通路２の壁面にぶ
つかり液状になって壁面流になるのを防止することがで
きる。FIG. 4 is a sectional view showing another embodiment of the present invention.
The difference from the figure is that the tip of the porous object 9 is closed,
The bag-like structure can prevent the ejected fuel from directly hitting the wall of the intake passage 2 and turning into liquid to form a wall flow.
また、この例のように袋状に閉塞すると燃料が先端部に
たまり、いわゆる、ぼた落ち現象を生じやすいので、多
孔質物体９は、吸気筒の中心部まで突出して使用するこ
とが望ましい。Furthermore, if the porous object 9 is closed in a bag-like manner as in this example, fuel accumulates at the tip and tends to cause a so-called dripping phenomenon, so it is desirable that the porous object 9 is used so as to protrude to the center of the intake cylinder.
このように本考案によれば、燃料噴射弁と吸気通路を多
孔質の管体で連通し、管体の外部に空間を設けこの空間
から多孔質部分を通して空気を管体内部に導くため燃料
が充分微細化されるものである。As described above, according to the present invention, the fuel injection valve and the intake passage are communicated with each other through a porous pipe body, and a space is provided outside the pipe body, and air is guided from this space into the inside of the pipe body through the porous portion, so that fuel can be It is sufficiently miniaturized.
第１図、第２図、第３図、第４図は、本考案の実施例を
示す断面図である。
１・・・本体、２・・・吸気通路、３・・・ベンチュリ
部、４・・・バイパス通路、５・・・感熱抵抗、６・・
・絞弁、７・・・電磁燃料噴射弁、８・・・燃料通路、
９・・・多孔質の管体、１０・・・空間、１１・・・空
気通路、１２・・・加圧燃料。1, 2, 3, and 4 are sectional views showing embodiments of the present invention. DESCRIPTION OF SYMBOLS 1... Main body, 2... Intake passage, 3... Venturi part, 4... Bypass passage, 5... Heat sensitive resistance, 6...
- Throttle valve, 7... Electromagnetic fuel injection valve, 8... Fuel passage,
9... Porous pipe body, 10... Space, 11... Air passage, 12... Pressurized fuel.
Claims (1)
の電磁燃料噴射弁に吸入空気量に対応した信号を与えて
空気量に対応した燃料を供給する内燃機関用燃料噴射装
置において、前記吸気通路と前記電磁燃料噴射弁の燃料
噴射孔とを多孔質の管体で連通ずると共に、前記管体の
外部に空気か導入される空間を設けこの空間から前記管
体を形成する多孔質部分を介して空気を前記管体内部に
導くように構成したことを特徴とする内燃機関用燃料噴
射装置。In the fuel injection device for an internal combustion engine, the fuel injection device has an electromagnetic fuel injection valve that injects fuel into an intake passage, and supplies a signal corresponding to an intake air amount to the electromagnetic fuel injection valve to supply fuel corresponding to the air amount. The intake passage and the fuel injection hole of the electromagnetic fuel injection valve are communicated with each other through a porous pipe body, and a space is provided outside the pipe body through which air is introduced, and the porous portion forms the pipe body from this space. A fuel injection device for an internal combustion engine, characterized in that it is configured to introduce air into the inside of the tube body through.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9506878U JPS591105Y2 (en) | 1978-07-12 | 1978-07-12 | Fuel injection device for internal combustion engines |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9506878U JPS591105Y2 (en) | 1978-07-12 | 1978-07-12 | Fuel injection device for internal combustion engines |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5514012U JPS5514012U (en) | 1980-01-29 |
| JPS591105Y2 true JPS591105Y2 (en) | 1984-01-12 |
Family
ID=29027667
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9506878U Expired JPS591105Y2 (en) | 1978-07-12 | 1978-07-12 | Fuel injection device for internal combustion engines |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS591105Y2 (en) |
-
1978
- 1978-07-12 JP JP9506878U patent/JPS591105Y2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5514012U (en) | 1980-01-29 |
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