JPH06101598A - Electromagnetic fuel injection system - Google Patents

Electromagnetic fuel injection system

Info

Publication number
JPH06101598A
JPH06101598A JP24757992A JP24757992A JPH06101598A JP H06101598 A JPH06101598 A JP H06101598A JP 24757992 A JP24757992 A JP 24757992A JP 24757992 A JP24757992 A JP 24757992A JP H06101598 A JPH06101598 A JP H06101598A
Authority
JP
Japan
Prior art keywords
nozzle
injection valve
injection
angle
injection port
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
Application number
JP24757992A
Other languages
Japanese (ja)
Inventor
Kazushi Miwa
一志 三輪
Yoshiyuki Tanabe
好之 田辺
Masahiro Soma
正浩 相馬
Atsushi Sekine
篤 関根
Toru Hirasawa
亨 平澤
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Ltd
Hitachi Automotive Systems Engineering Co Ltd
Original Assignee
Hitachi Automotive Engineering Co Ltd
Hitachi Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hitachi Automotive Engineering Co Ltd, Hitachi Ltd filed Critical Hitachi Automotive Engineering Co Ltd
Priority to JP24757992A priority Critical patent/JPH06101598A/en
Publication of JPH06101598A publication Critical patent/JPH06101598A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE:To provide an injection system capable of always supplying fuel to an intake engine at very low temperatures. CONSTITUTION:The relation between the size of the nozzle 10 of an injection valve and the position of an attaching member meets an expression: tantheta<(d1- d2)/(l1-l2)...(number I) Then, when the injection valve which meets the expression is used in a very low-temperature region, freezed water in intake is not splashed to a fuel injection hole, so the intake can be sprayed as usual at the start of an intake engine.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は噴射弁を有する吸気エン
ジンにおいて、常に燃料を供給させることに関するもの
である。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to always supplying fuel in an intake engine having an injection valve.

【0002】[0002]

【従来の技術】特開平2−55869号等で知られるように、
弁体で計測された燃料を噴射口から噴射するインジェク
タにおいて、噴射口のまわりにスカート部を設けて吸入
空気の流れの影響を低減するものが知られている。
2. Description of the Related Art As known from JP-A-2-55869,
It is known that an injector that injects fuel measured by a valve body from an injection port is provided with a skirt portion around the injection port to reduce the influence of the flow of intake air.

【0003】[0003]

【発明が解決しようとする課題】インジェクタの取付け
角度,ノズルの寸法関係によっては、このスカート部に
空気中の水分が析出して溜ってしまい、この水は寒冷地
の様な極低温状態では氷結してしまい、成長すると噴射
口が塞がれてしまい、燃料が噴射しないとか噴霧形状が
変化し運転性が悪くなるという不具合があった。
Depending on the mounting angle of the injector and the dimensional relationship of the nozzle, water in the air is deposited and accumulated in this skirt, and this water freezes in extremely cold conditions such as in cold regions. However, there is a problem that the injection port is blocked when it grows, and that fuel is not injected or the spray shape is changed to deteriorate the drivability.

【0004】本発明の目的は、インジェクタが傾斜して
取付けられて、スカート部に氷結が発生しても、噴射口
が塞がれる可能性の低いインジェクタを提供することに
ある。
An object of the present invention is to provide an injector in which the injection port is less likely to be blocked even when the skirt is iced and the skirt is iced.

【0005】[0005]

【課題を解決するための手段】噴射口部とノズル先端と
を結ぶ線が鉛直線に対し、0°〜90°の範囲になる様
に取付る為の部材を備えたことを特徴とするインジェク
タ。
An injector characterized in that it is provided with a member for attaching such that a line connecting an injection port portion and a tip of a nozzle is in a range of 0 ° to 90 ° with respect to a vertical line. .

【0006】[0006]

【作用】極低温時でも通常の始動性をもち、燃料の噴霧
形状にほとんど影響しない。
Function: It has a normal startability even at an extremely low temperature, and it hardly affects the shape of fuel spray.

【0007】[0007]

【実施例】以下、本発明の実施例を図1〜図6を用いて
説明する。
Embodiments of the present invention will be described below with reference to FIGS.

【0008】図1は電磁式燃料噴射装置の縦断面図、図
2,図3は本発明の特徴をもっともよく表した噴射口部
の縦断面図、図4は噴射装置の取付け部周辺の断面図、
図5,図6は実施例の一部である。
FIG. 1 is a vertical cross-sectional view of an electromagnetic fuel injection device, FIGS. 2 and 3 are vertical cross-sectional views of an injection port portion that best show the features of the present invention, and FIG. 4 is a cross-sectional view around the mounting portion of the injection device. Figure,
5 and 6 show a part of the embodiment.

【0009】図1において噴射弁は、図示しないコント
ロールユニットから電流が電磁コイル4に印加される
と、ヨーク1,コア2及びプランジャロッド8が磁気回
路を形成し、プランジャロッド8がコア2側に吸引さ
れ、ノズル10から離れる。取付け部材の燃料通路16
から燃料フィルタ12を介しヨーク1の側壁に具備され
た燃料入口13から電磁コイル4の外装3の外周を通り
スワラ11に流入した燃料は、スワラ11により旋回力
を付与され、プランジャロッド8とノズル10との間に
形成された環状隙間を通り、前記ノズル10に具備した
オリフィスで計量され噴射される。突起状の噴射口の場
合、噴霧はオリフィスを出て噴射口の出口エッジ部から
噴射される。また、噴射口がメガネ状の場合はメガネ部
通過時に2方向噴霧が形成される。ノズル10に設けら
れているスカート部は、噴霧に当らないように成形され
ており、吸入空気の流れの影響を低減する役割を果たし
ている。
In the injection valve of FIG. 1, when a current is applied to the electromagnetic coil 4 from a control unit (not shown), the yoke 1, the core 2 and the plunger rod 8 form a magnetic circuit, and the plunger rod 8 moves toward the core 2 side. It is sucked and leaves the nozzle 10. Fuel passage 16 for mounting member
The fuel that has flowed into the swirler 11 from the fuel inlet 13 provided in the side wall of the yoke 1 through the fuel filter 12 to the swirler 11 is given a swirling force by the swirler 11, and the plunger rod 8 and the nozzle It passes through an annular gap formed between the nozzle 10 and the nozzle 10, and is measured and jetted by an orifice provided in the nozzle 10. In the case of a projecting jet, the spray exits the orifice and is jetted from the outlet edge of the jet. Further, when the injection port is in the shape of glasses, two-way spray is formed when passing through the glasses. The skirt portion provided in the nozzle 10 is formed so as not to hit the spray, and plays a role of reducing the influence of the flow of intake air.

【0010】図2,図3に噴射口部の拡大図を示す。吸
気中の水分はノズルの外側に付着し凍結する。凍結した
水分の上に更に水分が付着し徐々に成長し17のように
なる。凍結した吸気中の水分17が噴射口部に掛からな
いように、l1,l2,d1,d2,θが下記の関係式を満
たす。
2 and 3 show enlarged views of the injection port portion. Moisture in the intake air adheres to the outside of the nozzle and freezes. Further water adheres to the frozen water, and gradually grows to become like 17. L 1 , l 2 , d 1 , d 2 , and θ satisfy the following relational expression so that the water 17 in the frozen intake air does not splash on the injection port.

【0011】 tanθ<(d1−d2)/(l1−l2) …(数2) 前記の内容は以下のような場合等に適応可能である。Tan θ <(d 1 −d 2 ) / (l 1 −l 2 ) ... (Equation 2) The above contents are applicable to the following cases.

【0012】 図5−A,B,図6−C,Dは、上記噴射部の噴口パタ
ーンと上記式中のd2の関係について示す。
[0012] FIGS. 5A, 5B, 6C, and 6D show the relationship between the injection port pattern of the injection portion and d 2 in the above equation.

【0013】上記実施例については、図7−A,B,図
8−Cに突起付き一体型,突起なし別体型,突起付き別
体型について示す。噴射口の距離d2 は、インジェクタ
の中心線から最も外側にある穴の遠方の外周までの距離
とする。
The above embodiment is shown in FIGS. 7-A, B and 8-C for the integral type with protrusions, the separate type without protrusions, and the separate type with protrusions. The distance d 2 of the injection port is the distance from the center line of the injector to the far outer periphery of the outermost hole.

【0014】突起を設けた場合、吸気中の水分がスカー
ト部に溜って凍結したとしても突起のない場合より多く
の水分に対応することができる。
When the protrusions are provided, even if the moisture in the intake air is accumulated in the skirt portion and frozen, it is possible to deal with a larger amount of moisture than when there is no protrusion.

【0015】[0015]

【発明の効果】極低温時においても、凍結した吸気中の
水分が燃料噴射口を塞ぐことなく、エンジン始動時通常
と同様の噴霧を確保でき、良好の始動性が得られるとい
う効果がある。
EFFECTS OF THE INVENTION Even at an extremely low temperature, the water content in the intake air that has been frozen does not block the fuel injection port, and it is possible to secure the same spray as at the time of starting the engine, and to obtain good starting performance.

【図面の簡単な説明】[Brief description of drawings]

【図1】電磁式燃料噴射装置の構造を示す縦断面図であ
る。
FIG. 1 is a vertical cross-sectional view showing the structure of an electromagnetic fuel injection device.

【図2】突起のある場合の噴射口付近の拡大図である。FIG. 2 is an enlarged view of the vicinity of an injection port when there is a protrusion.

【図3】突起のない場合の噴射口付近の拡大図である。FIG. 3 is an enlarged view of the vicinity of an injection port when there is no protrusion.

【図4】エンジンの噴射装置周辺の断面図である。FIG. 4 is a cross-sectional view of the vicinity of the injection device of the engine.

【図5】噴口パターンとd2 の関係図である。FIG. 5 is a relationship diagram between a nozzle pattern and d 2 .

【図6】噴口パターンとd2 の関係図である。FIG. 6 is a relationship diagram between a nozzle pattern and d 2 .

【図7】実施例の簡単な例を示す図である。FIG. 7 is a diagram showing a simple example of an embodiment.

【図8】実施例の簡単な例を示す図である。FIG. 8 is a diagram showing a simple example of an embodiment.

【符号の説明】[Explanation of symbols]

1…ヨーク、2…コア、4…コイル、8…プランジャロ
ッド、10…ノズル、15…取付け部材、17…凍結し
た吸気中の水分、18…シリンダ、20…吸気弁、22
…吸気管、24…噴射装置、25…噴射口、26,27
…別体用部品。
DESCRIPTION OF SYMBOLS 1 ... Yoke, 2 ... Core, 4 ... Coil, 8 ... Plunger rod, 10 ... Nozzle, 15 ... Mounting member, 17 ... Water in frozen intake air, 18 ... Cylinder, 20 ... Intake valve, 22
... intake pipe, 24 ... injection device, 25 ... injection port, 26, 27
… Separate parts.

───────────────────────────────────────────────────── フロントページの続き (72)発明者 田辺 好之 茨城県勝田市大字高場2520番地 株式会社 日立製作所自動車機器事業部内 (72)発明者 相馬 正浩 茨城県勝田市大字高場字鹿島谷津2477番地 3 日立オートモティブエンジニアリング 株式会社内 (72)発明者 関根 篤 茨城県勝田市大字高場字鹿島谷津2477番地 3 日立オートモティブエンジニアリング 株式会社内 (72)発明者 平澤 亨 茨城県勝田市大字高場2520番地 株式会社 日立製作所自動車機器事業部内 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Yoshiyuki Tanabe Yoshino Tanabe 2520 Takaba, Katsuta-shi, Ibaraki Hitachi, Ltd. Automotive Equipment Division (72) Inventor Masahiro Soma 2477 Kashima Yatsu Kashima Yatsu, Katsuta-shi, Ibaraki Prefecture Address 3 In Hitachi Automotive Engineering Co., Ltd. (72) Inventor Atsushi Sekine 2477 Kashima Yatsu, Katsuta-shi, Ibaraki Pref. 3 In Hitachi Automotive Engineering Co., Ltd. (72) Toru Hirasawa 2520, Takaba, Katsuta-shi, Ibaraki Prefecture Hitachi, Ltd. Automotive Equipment Division

Claims (4)

【特許請求の範囲】[Claims] 【請求項1】単数もしくは複数の吸気通路に向けて、噴
射口からの燃料流を供給する手段を有する吸気エンジン
に用いられ、噴射口のまわりにスカート部を設けている
電磁式燃料噴射弁(以下、噴射弁という)において、噴
射口部とノズル先端とを結ぶ線と噴射弁の軸のなす角度
が鉛直に対する噴射弁及び取付け部材の取付け角度より
大きいことを特徴とする電磁式燃料噴射装置。
1. An electromagnetic fuel injection valve for use in an intake engine having means for supplying a fuel flow from an injection port toward one or a plurality of intake passages, wherein a skirt portion is provided around the injection port ( (Hereinafter referred to as an injection valve), the angle formed by the line connecting the injection port portion and the nozzle tip and the axis of the injection valve is larger than the attachment angle of the injection valve and the attachment member with respect to the vertical.
【請求項2】請求項1において、噴射弁及び取り付け部
材の取付け角度を鉛直に対し鋭角とすることを特徴とす
る電磁式燃料噴射装置。
2. The electromagnetic fuel injection device according to claim 1, wherein the mounting angle of the injection valve and the mounting member is an acute angle with respect to the vertical.
【請求項3】請求項1において、噴射弁及び取付け部材
の取付け角度とノズルの形状の関係が tanθ<(d1−d2)/(l1−l2) …(数1) の式を満たすことを特徴とする電磁式燃料噴射装置。 θ :鉛直に対する噴射弁の取付け角度 d1 :ノズルの中心線からスカート部内径エッジ部先端
までの距離 d2 :ノズルの中心線より最も遠い噴射口の外側までの
距離 l1 :ノズルのスカート部の高さ l2 :ノズルの噴射口部の高さ
3. The relationship between the mounting angle of the injection valve and the mounting member and the shape of the nozzle according to claim 1, is expressed by tan θ <(d 1 −d 2 ) / (l 1 −l 2 ) ... (Equation 1) An electromagnetic fuel injection device characterized by satisfying. θ: Installation angle of the injection valve with respect to vertical d 1 : Distance from the center line of the nozzle to the tip of the inner diameter edge of the skirt part d 2 : Distance from the center line of the nozzle to the outside of the injection port l 1 : The skirt part of the nozzle Height l 2 : Height of nozzle injection port
【請求項4】請求項3において、噴射弁及び取り付け部
材の取付け角度を鉛直に対し鋭角とすることを特徴とす
る電磁式燃料噴射装置。
4. The electromagnetic fuel injection device according to claim 3, wherein the mounting angle of the injection valve and the mounting member is an acute angle with respect to the vertical.
JP24757992A 1992-09-17 1992-09-17 Electromagnetic fuel injection system Pending JPH06101598A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP24757992A JPH06101598A (en) 1992-09-17 1992-09-17 Electromagnetic fuel injection system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP24757992A JPH06101598A (en) 1992-09-17 1992-09-17 Electromagnetic fuel injection system

Publications (1)

Publication Number Publication Date
JPH06101598A true JPH06101598A (en) 1994-04-12

Family

ID=17165603

Family Applications (1)

Application Number Title Priority Date Filing Date
JP24757992A Pending JPH06101598A (en) 1992-09-17 1992-09-17 Electromagnetic fuel injection system

Country Status (1)

Country Link
JP (1) JPH06101598A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10021073B4 (en) * 1999-04-30 2005-08-11 Aisan Kogyo K.K., Obu fuel injector
US7234654B2 (en) 2003-06-04 2007-06-26 Robert Bosch Gmbh Fuel injector

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10021073B4 (en) * 1999-04-30 2005-08-11 Aisan Kogyo K.K., Obu fuel injector
US7234654B2 (en) 2003-06-04 2007-06-26 Robert Bosch Gmbh Fuel injector

Similar Documents

Publication Publication Date Title
JP3478920B2 (en) In-cylinder fuel injection device and internal combustion engine equipped with the same
US5150691A (en) Engine fuel injector
US4771948A (en) Combination of a fuel injection valve and a nozzle
KR930004967B1 (en) Electronic fuel injector
JPH09126095A (en) Fuel injection valve
CN1080378C (en) I.C. engine oil spraying valve
CA2045054A1 (en) Dual spray director using an &#34;h&#34; annulus
JPH06101598A (en) Electromagnetic fuel injection system
JP4229597B2 (en) Injection valve
JPH11159424A (en) Fuel injection device for internal combustion engine
JP3572591B2 (en) Fluid injection nozzle and electromagnetic fuel injection valve using the same
JPS6341580Y2 (en)
JPH0424144Y2 (en)
US5411212A (en) Fuel injection valve
JP2004353558A (en) Fuel injection apparatus of internal combustion engine
JPH0225031B2 (en)
US5597121A (en) Fuel injection valve
RU2002133212A (en) ELECTROMAGNETIC VALVE VALVE
JPS59113255A (en) Air-assist apparatus for fuel injection type engine
KR200252304Y1 (en) Air shroud injector with thread passages
JPH085333Y2 (en) Electromagnetic fuel injection valve for internal combustion engine
JPH0439414Y2 (en)
JP2675153B2 (en) Fuel injection valve
JPS597772A (en) Fuel injection device
KR950008320Y1 (en) Intake structure for i.c engine