JPH02163465A - Fuel branch pipe - Google Patents
Fuel branch pipeInfo
- Publication number
- JPH02163465A JPH02163465A JP63320152A JP32015288A JPH02163465A JP H02163465 A JPH02163465 A JP H02163465A JP 63320152 A JP63320152 A JP 63320152A JP 32015288 A JP32015288 A JP 32015288A JP H02163465 A JPH02163465 A JP H02163465A
- Authority
- JP
- Japan
- Prior art keywords
- fuel
- injection valve
- fuel injection
- branch pipe
- inlet
- 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
- 239000000446 fuel Substances 0.000 title claims abstract description 210
- 238000002347 injection Methods 0.000 claims abstract description 82
- 239000007924 injection Substances 0.000 claims abstract description 82
- 238000002485 combustion reaction Methods 0.000 claims description 9
- 230000015572 biosynthetic process Effects 0.000 abstract 1
- 230000001105 regulatory effect Effects 0.000 description 4
- 239000002828 fuel tank Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000010926 purge Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 230000008016 vaporization Effects 0.000 description 1
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
- F02M69/00—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel
- F02M69/46—Details, component parts or accessories not provided for in, or of interest apart from, the apparatus covered by groups F02M69/02 - F02M69/44
- F02M69/462—Arrangement of fuel conduits, e.g. with valves for maintaining pressure in the pipes after the engine being shut-down
- F02M69/465—Arrangement of fuel conduits, e.g. with valves for maintaining pressure in the pipes after the engine being shut-down of fuel rails
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明は、燃料タンクに接続される燃料配管から、燃料
噴射弁に燃料を導く燃料分岐管に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a fuel branch pipe that guides fuel from a fuel pipe connected to a fuel tank to a fuel injection valve.
［従来の技術］
燃料噴射弁は、内燃機関の燃焼室、あるいはインテーク
マニホールド内に燃料を噴射するため、噴射孔を有する
燃料噴射弁の先端側が、内燃機関の燃焼室、あるいはイ
ンテークマニホールド内に露出して取り付けられている
。[Prior Art] A fuel injection valve injects fuel into the combustion chamber or intake manifold of an internal combustion engine, so the tip side of the fuel injection valve having an injection hole is exposed in the combustion chamber or intake manifold of the internal combustion engine. It has been installed.
従って、燃料噴射弁の上方から燃料を導入する、いわゆ
るトップフィード方式の燃料噴射弁は、燃料噴射時以外
には、噴射孔に燃料を導く燃料流路内に燃料が滞留する
。このため、内燃機関の連続高負荷運転時や、高負荷後
のアイドル運転時などには、燃料流路内の燃料が、内燃
機関からの熱を受けて高温となり、燃料が気化して気泡
（ペーパー）が発生する。Therefore, in a so-called top-feed type fuel injection valve in which fuel is introduced from above the fuel injection valve, fuel remains in the fuel flow path that leads the fuel to the injection hole except when fuel is injected. Therefore, during continuous high-load operation of the internal combustion engine or during idling operation after high load, the fuel in the fuel flow path receives heat from the internal combustion engine and reaches a high temperature, causing the fuel to vaporize and form bubbles ( paper) occurs.
そこで、このような気泡の発生を減少させるとともに、
発生した気泡を排出するために、特開昭６０−８８８６
６号公報、あるいは特開昭６０−１０１２６９号公報で
は、燃料の導入を燃料噴射弁の横方向（径方向）から行
う、いわゆるボトムフィート方式が採用されている。Therefore, in addition to reducing the generation of such bubbles,
In order to discharge the generated air bubbles, Japanese Patent Application Laid-Open No. 60-8886
No. 6 or Japanese Unexamined Patent Publication No. 60-101269 adopts a so-called bottom foot method in which fuel is introduced from the lateral direction (radial direction) of the fuel injection valve.
これは、燃料噴射弁の外周に、燃料配管に接続される燃
料の流入口と流出口とを設けた燃料分岐管を取り付け、
燃料噴射弁の周囲と燃料分岐管との間に形成される間隙
部に、燃料を供給して燃料流路内の燃料を冷却するとと
もに、燃料分岐管の流入口から流出口に向かって間隙部
内を流れる燃料により、燃料流路内で発生した気泡を燃
料分岐管の流出口より排出するものである。This is done by attaching a fuel branch pipe to the outer periphery of the fuel injection valve, which is connected to the fuel pipe and has a fuel inlet and outlet.
Fuel is supplied to the gap formed between the fuel injection valve and the fuel branch pipe to cool the fuel in the fuel flow path, and the fuel is supplied into the gap from the inlet to the outlet of the fuel branch pipe. Bubbles generated in the fuel flow path due to the fuel flowing through the fuel flow path are discharged from the outlet of the fuel branch pipe.
［発明が解決しようとする課題］
しかるに、特開昭６Ｏ−８８８６ｔ３号公報のものは、
燃料分岐管の流入口と流出口とを結ぶ燃料の流通経路が
、燃料噴射弁の中心軸に対してオフセットして取り付け
られているが、オフセラ１〜量が大きく、流入口から流
出口に至る間隙部の、燃料噴射弁の軸と直角方向の隙間
寸法が、燃料分岐管の流入口および流出口の、燃料噴射
弁の軸と直角方向の間陳寸法より大きくなる。[Problem to be solved by the invention] However, the problem disclosed in Japanese Patent Application Laid-Open No. 6O-8886t3 is
The fuel flow path connecting the inlet and outlet of the fuel branch pipe is installed offset from the central axis of the fuel injector, but the amount is large and extends from the inlet to the outlet. The dimension of the gap in the direction perpendicular to the axis of the fuel injection valve is larger than the dimension of the inlet and outlet of the fuel branch pipe in the direction perpendicular to the axis of the fuel injection valve.
このため、燃料配管を介して供給された燃料の主流が、
流入口から流出口に向かってほぼ一直線に突き抜ける。For this reason, the main flow of fuel supplied via the fuel piping is
It penetrates almost in a straight line from the inlet to the outlet.
その結果、流入口から流入した燃料が、燃料噴射弁の周
囲と燃料分岐管との間に形成される環状の間隙部内に拡
散されず、燃料流路内で発生、した後、間隙部に流出し
た気泡の排出性が良くない課題を有していた。As a result, the fuel that flows in from the inlet is not diffused into the annular gap formed between the fuel injection valve and the fuel branch pipe, and is generated within the fuel flow path and then flows out into the gap. However, there was a problem in that the air bubbles were not well discharged.
一方、特開昭６０−１０７２６９号公報のものは、燃料
の流入口および流出口が、燃料分岐管の中央（燃料噴射
弁の径方向の中央）に収り付けられているため、流入口
からの流れの主流が、燃料噴射弁の中央部に衝突する。On the other hand, in the device disclosed in Japanese Patent Application Laid-Open No. 60-107269, the fuel inlet and outlet are located at the center of the fuel branch pipe (the radial center of the fuel injection valve). The mainstream of the flow impinges on the center of the fuel injector.
その結果、流れの方向が急激に変化して、燃料噴射弁周
囲の圧力が上昇するため、燃料流路内の圧力カ月−昇し
、規定の噴射量を噴射させることができなくなる可能性
があった。As a result, the direction of the flow changes rapidly and the pressure around the fuel injector increases, which increases the pressure in the fuel flow path and may make it impossible to inject the specified amount. Ta.
本発明は上記事情に基づいてなされたもので、その目的
は、燃料噴射弁の噴射量に影響を及ぼすことなく、燃料
噴射弁の内部で発生した気泡の排出性を向上させた燃料
分岐管を提供することにある。The present invention has been made based on the above circumstances, and its object is to provide a fuel branch pipe that improves the ability to discharge air bubbles generated inside a fuel injection valve without affecting the injection amount of the fuel injection valve. It is about providing.
Ｃ課題を解決するための手段］
本発明は上記目的をｊｔ成するために、燃料の流入口お
よび流出口を備えるとともに、内燃機関に燃料を噴射す
る燃料噴射弁の周囲に前記流入口および前記流出口と連
通ずる環状の間隙部を有して前記燃料噴射弁が組み付け
られ、前記燃料噴射弁に燃料を導く燃料分岐管において
、前記流入口および前記流出口は、前記流入口と前記流
出口とを結ぶ中心線が、前記燃料噴射弁の中心軸に対し
てオフセットして設けられるとともに、前記流入口およ
び前記流出口の前記燃料噴射弁の軸と直角方向の寸法が
、前記流入口から前記流出口に全、る前記間隙部の前記
燃料噴射弁の軸と直角方向の間陳寸法より大きく形成さ
れたことを技術的手段とする。C Means for Solving the Problem] In order to achieve the above object, the present invention is provided with a fuel inlet and an outlet, and the inlet and the fuel outlet are provided around a fuel injection valve that injects fuel into an internal combustion engine. In a fuel branch pipe in which the fuel injector is assembled with an annular gap communicating with the outflow port and which leads fuel to the fuel injector, the inflow port and the outflow port are connected to the inflow port and the outflow port. A center line connecting the fuel injector is offset with respect to the central axis of the fuel injection valve, and a dimension of the inlet and the outlet in a direction perpendicular to the axis of the fuel injector is set from the inlet to the fuel injector. The technical means is that the entire gap at the outlet is formed to be larger than the width of the gap in the direction perpendicular to the axis of the fuel injection valve.
〔作用および発明の効果１
」二記構成よりなる本発明の燃料分岐管は、燃料噴射弁
の中心軸に対してオフセットして設けられた流入口およ
び流出口の燃料噴射弁の軸と直角方向の寸法が、流入口
から流出口に至る間隙部の燃料噴射弁の軸と直角方向の
間陳寸法より大きく形成されたことにより、流入口より
流出口に向かって流れる燃料の主流が、燃料噴射弁の中
心部に衝突せす、且つ流入口より流出口に向かって一直
線に突き抜けることなく滑らかに変化する。[Operation and Effects of the Invention 1] The fuel branch pipe of the present invention having the following two configurations has an inlet and an outlet that are offset from the central axis of the fuel injector in a direction perpendicular to the axis of the fuel injector. Since the dimensions of the gap between the inlet and the outlet are formed to be larger than the gap in the direction perpendicular to the axis of the fuel injection valve, the main flow of fuel flowing from the inlet to the outlet is directed toward the fuel injection valve. It collides with the center of the valve, and changes smoothly from the inlet to the outlet without passing through in a straight line.
このため、燃料噴射弁周囲の圧力が」・、昇することな
く、規定の噴射量を噴射させることができる。Therefore, the prescribed injection amount can be injected without increasing the pressure around the fuel injection valve.
また、流入口より流入した燃料の流れが、燃料噴射弁の
軸と同方向、および環状の間隙部内へも拡散することに
より、間隙部内の燃料の循環が促進され、燃料噴射弁の
燃料流路から間隙部内へ流出した気泡の排出性を向上、
させることができる。In addition, the flow of fuel flowing in from the inlet port diffuses in the same direction as the axis of the fuel injection valve and into the annular gap, which promotes the circulation of fuel within the gap and improves the fuel flow path of the fuel injection valve. Improves the evacuation of air bubbles that flow into the gap from the
can be done.
し実施例］
次に、本発明の燃ｆ′１分岐管を図面に示す一実施例に
基づき説明する。Embodiment] Next, the fuel f'1 branch pipe of the present invention will be described based on an embodiment shown in the drawings.
第１図は電磁式燃料噴射弁を組み付＆Ｊた燃料分岐管の
断面図、第４図は燃料供給システムの概略図である。FIG. 1 is a sectional view of a fuel branch pipe with an electromagnetic fuel injection valve assembled therein, and FIG. 4 is a schematic diagram of the fuel supply system.
本実施例の燃料供給システムは、エンジン（図示しない
）の気筒数に応じた数の燃料噴射弁１が、燃焼用空気を
供給するためのインテークマニホールドに取り付けられ
たマルチポイントインジェクション方式であり、各燃ｆ
１噴射弁１は、第２図および第３図に示ｔように、それ
ぞれ燃料分岐管２に組み付けられて、燃料配管３に接続
されている。The fuel supply system of this embodiment is a multi-point injection system in which a number of fuel injection valves 1 corresponding to the number of cylinders of an engine (not shown) are attached to an intake manifold for supplying combustion air. fuel f
As shown in FIGS. 2 and 3, each injection valve 1 is assembled into a fuel branch pipe 2 and connected to a fuel pipe 3.
燃料配管３は、燃料タンク４に接続され、燃料ポンプ５
、燃料フィルタ６、および圧力調節弁（ルッシャレギュ
レータ）７が取り付けられている（第４図参照〉。The fuel pipe 3 is connected to a fuel tank 4 and a fuel pump 5
, a fuel filter 6, and a pressure regulating valve (Luscher regulator) 7 are attached (see FIG. 4).
燃料ポンプ５から圧力調節弁７に至る燃料配管３内の燃
料は、圧力調節弁７によって、インテークマニホールド
内の圧力に対して一定の圧力差となるように保たれてい
る。The fuel in the fuel pipe 3 extending from the fuel pump 5 to the pressure control valve 7 is maintained by the pressure control valve 7 so as to have a constant pressure difference with respect to the pressure in the intake manifold.
従って、各燃料噴射弁１には、燃料配管３内の加圧燃料
が各燃料分岐管２を介して導かれ、コンピュータからの
噴射信号を受けて、インテークマニホールド内に計量噴
射される。Therefore, the pressurized fuel in the fuel pipe 3 is guided to each fuel injection valve 1 via each fuel branch pipe 2, and is injected into the intake manifold in a metered amount in response to an injection signal from the computer.
なお、燃料噴射弁１は、燃料の導入を燃料噴射弁１の横
方向（径方向）から行う、いわゆるボトムフィード方式
を採用した周知の構造を有するものである。The fuel injection valve 1 has a well-known structure that employs a so-called bottom feed system in which fuel is introduced from the lateral direction (radial direction) of the fuel injection valve 1.
この燃料噴射弁１には、燃料分岐管２に供給された燃料
を、燃料噴射弁１内部の燃料流路（図示しない）に導く
ためのフィードホール８が燃料噴射弁１の噴射孔９寄り
に、また燃料流路内で燃料が気化することにより発生し
た気泡（ペーパー）を排出するためのバージポール１０
が燃料噴射弁１のほぼ中間部に、それぞれ複数箇所開口
されている。This fuel injection valve 1 has a feed hole 8 near the injection hole 9 of the fuel injection valve 1 for guiding the fuel supplied to the fuel branch pipe 2 to a fuel flow path (not shown) inside the fuel injection valve 1. , and a barge pole 10 for discharging air bubbles (paper) generated by vaporizing fuel in the fuel flow path.
are opened at a plurality of locations approximately in the middle of the fuel injection valve 1.
フィードホール８およびバージホール１ｏの外周開口面
には、それぞれ樹脂フィルタ１１．１２が取り付けられ
ている。Resin filters 11 and 12 are attached to the outer peripheral opening surfaces of the feed hole 8 and the barge hole 1o, respectively.
燃料分岐管２は、内部に組み込まれる燃料噴射弁１の外
形に対応した段１すき円筒状の分岐管本体２ａに、燃料
配管３に接続される燃１：１の流入口２ｂおよび流出口
２Ｃが形成されている。The fuel branch pipe 2 has a cylindrical branch pipe main body 2a with one stage corresponding to the outer shape of the fuel injection valve 1 incorporated therein, and a 1:1 fuel inlet 2b and an outlet 2C connected to the fuel pipe 3. is formed.
分岐管本体２ａ内に挿入される燃料噴射弁１には、パー
ジホール１０より上部（第１図」−側）の外周部と、フ
ィードホール８より下部の外周部とに０リング１３．１
４が嵌め合わされ、０リング１３から０リング１４に亘
って、燃料噴射弁１の周囲には燃料分岐管２との間に環
状の間隙部１５が形成される。The fuel injection valve 1 inserted into the branch pipe main body 2a has O-rings 13.1 on the outer periphery above the purge hole 10 (on the − side in FIG. 1) and on the outer periphery below the feed hole 8.
4 are fitted together, and an annular gap 15 is formed around the fuel injection valve 1 and between the O-ring 13 and the O-ring 14 and the fuel branch pipe 2.
燃料分岐管２の流入口２ｂおよび流出口２ｃは、分岐管
本体２ａに燃料噴射弁１を挿入した際に、バージポール
１０の開口部よりやや上部位置となるように形成される
とともに、流入口２ｂと流出口２ｃとを結ぶ中心線が、
燃料噴射弁１の中心軸に対してオフセットして設けられ
ている。The inlet 2b and outlet 2c of the fuel branch pipe 2 are formed to be located slightly above the opening of the barge pole 10 when the fuel injection valve 1 is inserted into the branch pipe main body 2a, and the inlet The center line connecting 2b and the outlet 2c is
It is provided offset with respect to the central axis of the fuel injection valve 1.
このオフセット量は、流入１］２ｂおよび流出口２ｃの
燃料噴射弁１の軸と直角方向の寸法が、流入口２ｂから
流出口２Ｃに至る間隙部１５の、燃料噴射弁１の軸と直
角方向の間隙司法より大きくなるように設定されている
。本実施例では、流入口２ｂと流出１］２Ｃとを結ぶ中
心線の中間点から燃料噴射弁１の中心軸までの距離が、
パージホール１ｏの開１コ部を古む燃料噴射弁１の−ｆ
径とほぼ同じに設けられている。This offset amount is such that the dimension of the inlet 1] 2b and the outlet 2c in the direction perpendicular to the axis of the fuel injector 1 is the same as the dimension of the gap 15 extending from the inlet 2b to the outlet 2C in the direction perpendicular to the axis of the fuel injector 1. It is set to be larger than the interstitial justice. In this embodiment, the distance from the midpoint of the center line connecting the inlet 2b and the outlet 1]2C to the central axis of the fuel injector 1 is
-f of the fuel injector 1 that olds the open 1 part of the purge hole 1o
The diameter is approximately the same.
なお、燃料噴射弁１は、インテークマニホールドに対し
て、燃料噴射弁１の中心軸が約４５度の傾きを持って取
り付けられ、このとき燃料分岐管２は、流入口２ｂおよ
び流出口２ｃが、燃料噴射弁１の中心軸より上方［（天
地方向に対して上側）に位置するように燃料噴射弁１が
組み付けられる。これは、燃料分岐管２の流入口２ｂお
よび流出口２ｃを、燃料噴射弁１の中心軸より下方側に
設定した場合と比較して、気泡自体が燃料中を」−昇す
ることがら、気泡の排出性を良くすることができるもの
である。The fuel injection valve 1 is installed with the center axis of the fuel injection valve 1 inclined at an angle of about 45 degrees with respect to the intake manifold, and at this time, the fuel branch pipe 2 has an inlet 2b and an outlet 2c such that the inlet 2b and the outlet 2c are The fuel injection valve 1 is assembled so as to be located above the central axis of the fuel injection valve 1 [(upper side with respect to the vertical direction). This is because the bubbles themselves rise in the fuel compared to the case where the inlet 2b and outlet 2c of the fuel branch pipe 2 are set below the central axis of the fuel injection valve 1. It is possible to improve the discharge performance of.
燃料分岐管２内に挿入された燃料噴射弁１は、燃ｔ１噴
射弁１の盾部に形成したフランジ部（図示しない）を、
分岐管本体２ａの」二層闇ロ部に当接して位置決めした
後、分岐管本体２ａに押さえ板１６をねじ止めすること
によって燃料分岐管２に組み付は保持される。The fuel injection valve 1 inserted into the fuel branch pipe 2 has a flange portion (not shown) formed on the shield portion of the fuel t1 injection valve 1.
After abutting against and positioning the two-layer dark side portion of the branch pipe main body 2a, the holding plate 16 is screwed to the branch pipe main body 2a to maintain the assembly in the fuel branch pipe 2.
次に、上記実施例の作動について簡単に説明する。Next, the operation of the above embodiment will be briefly explained.
エンジンの始動により、圧力調節弁７によって一定圧力
に調圧された燃料が、燃ｔ１配管３より燃料分岐管２を
介して、主にフィードホール８より燃料噴射弁１内の燃
料流路に供給される。When the engine starts, fuel whose pressure is regulated to a constant level by the pressure regulating valve 7 is supplied from the fuel t1 pipe 3 to the fuel flow path in the fuel injection valve 1 through the fuel branch pipe 2 and mainly through the feed hole 8. be done.
燃料噴射弁１では、コンピュータからのパルス信号（噴
射信号）に応じて、インテークマニホールド内に計量噴
射される。The fuel injection valve 1 injects a metered amount into the intake manifold in response to a pulse signal (injection signal) from a computer.
燃料噴射弁１では、インテークマニホールドからの熱や
エンジンルーム内の熱を受けて燃料流路内で発生した気
泡が、主にバージホール１０より間隙部１５に流出する
。In the fuel injection valve 1, bubbles generated in the fuel flow path due to heat from the intake manifold or heat in the engine room flow mainly through the barge hole 10 into the gap 15.
バージボール１０あるいはフィードホールＢから流出し
た気泡は、間隙部１５内の燃料の流れに沿って流れると
ともに、浮力によって、インテークマニホールドに対し
て約４５度の傾きを看する燃料噴射弁１の間隙部１５内
を上昇する。The air bubbles flowing out from the barge ball 10 or the feed hole B flow along with the flow of fuel in the gap 15, and due to buoyancy, the gap of the fuel injection valve 1 is tilted at about 45 degrees with respect to the intake manifold. It rises within 15.
燃料分岐管２は、流入口２ｂおよび流出口２Ｃが、バー
ジポール１０の開口部より上部位置で、且つ燃料噴射弁
１の中心軸より１、方ｌ！１１＜天地方向に対して上側
）に位置するように設けられているため、間隙部１５内
を土、昇してきた気泡は、流入口２ｂから流出口２Ｃに
向かって流れる燃料とともに流れ、流出口２Ｃより排出
される。The fuel branch pipe 2 has an inlet 2b and an outlet 2C located above the opening of the barge pole 10 and at a distance of 1,000 mm from the central axis of the fuel injection valve 1! 11<upper side in the vertical direction), the air bubbles that have risen inside the gap 15 flow together with the fuel flowing from the inlet 2b toward the outlet 2C, and It is discharged from 2C.
このとき、本実施例では、燃料分岐管２の流入口２ｂと
流出口２Ｃとを結ぶ中心線が、燃料噴射弁１の中心軸に
対してオフセットして設けられ、流入口２ｂおよび流出
口２Ｃの燃料噴射弁１の軸と直角方向の寸法が、流入口
２ｂから流出口２Ｃに至る間隙部１５の、燃料噴射弁１
の軸と直角方向の間陳寸法より大きくなるように設定さ
れていることから、流入口２ｂから流出口２Ｃに向かっ
て流れる燃料の主流は、燃料噴射弁１の中心部に１に突
せず、且つ流入口２ｂより流出口２Ｃに向かって一直線
に突き抜けることなく滑らかに変化する。At this time, in this embodiment, the center line connecting the inlet 2b and the outlet 2C of the fuel branch pipe 2 is offset with respect to the central axis of the fuel injection valve 1, and the inlet 2b and the outlet 2C The dimension of the fuel injection valve 1 in the direction perpendicular to the axis of the fuel injection valve 1 is such that the gap 15 extends from the inlet 2b to the outlet 2C.
The main flow of fuel flowing from the inlet 2b toward the outlet 2C does not impinge on the center of the fuel injection valve 1. , and changes smoothly from the inlet 2b toward the outlet 2C without passing through in a straight line.
このため、燃料噴射弁１周囲の圧力は上昇せず、また、
流入口２ｂから流入した燃料の流れは、燃料噴射弁１の
軸方向、および環状の間隙部１５内へも拡散する。Therefore, the pressure around the fuel injection valve 1 does not increase, and
The flow of fuel flowing in from the inlet 2b also diffuses in the axial direction of the fuel injection valve 1 and into the annular gap 15.
従って、燃料噴射弁１の燃＄Ｓ＋流路内の圧力が変化す
ることなく、規定の噴射量を噴射することができるとと
もに、間隙部１５内の燃料の循環が促進され、バージホ
ール１０から流出した気泡も、流入口２ｂから流出口２
Ｃに向かって流れる燃料とともにすみやかに燃料分岐管
２より排出されることになる。Therefore, the prescribed injection amount can be injected without changing the pressure in the fuel S+ flow path of the fuel injection valve 1, and the circulation of the fuel in the gap 15 is promoted and the fuel flows out from the barge hole 10. The air bubbles also flow from the inlet 2b to the outlet 2.
The fuel is immediately discharged from the fuel branch pipe 2 together with the fuel flowing toward C.
第５図に本発明の第２実施例を示ｔ。FIG. 5 shows a second embodiment of the present invention.
本実施例では、第５図に示すように、燃料分岐管２に対
して、燃料配管３を斜めに取り付けることにより、気泡
の排出性を向上させたものである。In this embodiment, as shown in FIG. 5, the fuel pipe 3 is attached obliquely to the fuel branch pipe 2, thereby improving the bubble discharge performance.
つまり、燃料配管３を、燃料タンク４側（第５図左側）
より、圧力調節弁７側（第５図右側）が、天地方向に対
して斜め１一方となるように取り付けたものである。こ
れにより、各燃料噴射弁１より排出された気泡が、気泡
自体の浮力によって上昇することから、燃料配管３を水
平方向に収り１寸けた場合と比較して、さらに気泡の排
出性を向上させることができる。In other words, connect the fuel pipe 3 to the fuel tank 4 side (left side in Figure 5).
Therefore, the pressure regulating valve 7 side (right side in FIG. 5) is installed so as to be diagonal to the vertical direction. As a result, the bubbles discharged from each fuel injector 1 rise due to the buoyancy of the bubbles themselves, which further improves bubble discharge performance compared to when the fuel pipe 3 is fitted horizontally and left 1 inch apart. can be done.
（変形例）
上記実施例では、電磁式燃料噴射弁１としたが、電磁式
に限定する必要はない。また、本発明の燃料分岐管２を
、マルチポイントインジェクション方式の燃料供給シス
テムに適用したが、シングルポイントインジエクシヲン
方式に適用しても良い。(Modification) In the above embodiment, the electromagnetic fuel injection valve 1 is used, but it is not necessary to limit it to the electromagnetic type. Furthermore, although the fuel branch pipe 2 of the present invention is applied to a multi-point injection type fuel supply system, it may also be applied to a single-point injection type fuel supply system.
燃料分岐管２は、流入口２ｂおよび流出口２Ｃが、燃料
分岐管２内に挿入した燃料噴射弁１の中心軸より１方側
に位置するように設定したが、」・、方間に限定するも
のではない。The fuel branch pipe 2 was set so that the inlet 2b and the outlet 2C were located on one side of the central axis of the fuel injector 1 inserted into the fuel branch pipe 2, but it was limited to the direction. It's not something you do.
第１図ないし第４図は本発明の第１実施例を示すもので
、第１図は燃料噴射弁を組み付けた燃料分岐管の断面図
、第２図および第３図は燃料噴射弁を組み付けた燃料分
岐管の燃そ１配管への収り付は状態図、第４図は燃料供
給システムの概略図であり、第５図は本発明の第２実施
例を示すもので、燃料分岐管の燃料配管への収り１旧す
状態図である。
図中
１・・・燃料噴射弁
２・・・燃料分岐管
２ｂ・・・流入口
２Ｃ・・・流出口
１５・・・間隙部1 to 4 show a first embodiment of the present invention. FIG. 1 is a sectional view of a fuel branch pipe with a fuel injection valve assembled therein, and FIGS. 2 and 3 are a sectional view of a fuel branch pipe with a fuel injection valve assembled thereon. Fig. 4 is a schematic diagram of the fuel supply system, and Fig. 5 shows the second embodiment of the present invention. FIG. In the figure 1...Fuel injection valve 2...Fuel branch pipe 2b...Inflow port 2C...Outlet port 15...Gap part
Claims (1)
燃機関に燃料を噴射する燃料噴射弁の周囲に前記流入口
および前記流出口と連通する環状の間隙部を有して前記
燃料噴射弁が組み付けられ、前記燃料噴射弁に燃料を導
く燃料分岐管において、前記流入口および前記流出口は
、前記流入口と前記流出口とを結ぶ中心線が、前記燃料
噴射弁の中心軸に対してオフセットして設けられるとと
もに、前記流入口および前記流出口の前記燃料噴射弁の
軸と直角方向の寸法が、前記流入口から前記流出口に至
る前記間隙部の前記燃料噴射弁の軸と直角方向の間陳寸
法より大きく形成されたことを特徴とする燃料分岐管。1) The fuel injector is assembled with a fuel inlet and an outlet and an annular gap communicating with the inlet and the outlet around the fuel injector that injects fuel into the internal combustion engine. In the fuel branch pipe that leads fuel to the fuel injection valve, the inlet and the outlet are such that a center line connecting the inlet and the outlet is offset with respect to a central axis of the fuel injector. and the dimensions of the inlet and the outlet in a direction perpendicular to the axis of the fuel injection valve are between the dimensions of the gap from the inlet to the outlet in the direction perpendicular to the axis of the fuel injector. A fuel branch pipe characterized in that it is formed larger than a fuel branch pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63320152A JP2797353B2 (en) | 1988-12-19 | 1988-12-19 | Fuel branch pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63320152A JP2797353B2 (en) | 1988-12-19 | 1988-12-19 | Fuel branch pipe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02163465A true JPH02163465A (en) | 1990-06-22 |
| JP2797353B2 JP2797353B2 (en) | 1998-09-17 |
Family
ID=18118288
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63320152A Expired - Fee Related JP2797353B2 (en) | 1988-12-19 | 1988-12-19 | Fuel branch pipe |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2797353B2 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0331576A (en) * | 1989-06-28 | 1991-02-12 | Fuji Injiekuta Kk | Injector housing for fuel distribution |
| US5372113A (en) * | 1994-01-25 | 1994-12-13 | Siemens Automotive L.P. | Weir control of fuel level in a fuel rail tube for reducing the risk of hydra-lock |
| JP2014122637A (en) * | 2005-03-03 | 2014-07-03 | Robert Bosch Gmbh | Fuel injection device |
| JP2017014961A (en) * | 2015-06-30 | 2017-01-19 | 株式会社クボタ | Fuel injection engine |
| WO2020154153A1 (en) * | 2019-01-24 | 2020-07-30 | Caterpillar Inc. | Fuel rail |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6088866A (en) * | 1983-09-23 | 1985-05-18 | ザ ベンディクス コ−ポレ−ション | Fuel jet apparatus |
| JPS62118058A (en) * | 1985-11-18 | 1987-05-29 | Hitachi Ltd | Fuel injecting device |
| JPS63158583U (en) * | 1987-04-06 | 1988-10-18 | ||
| JPS63182276U (en) * | 1987-05-15 | 1988-11-24 |
-
1988
- 1988-12-19 JP JP63320152A patent/JP2797353B2/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6088866A (en) * | 1983-09-23 | 1985-05-18 | ザ ベンディクス コ−ポレ−ション | Fuel jet apparatus |
| JPS62118058A (en) * | 1985-11-18 | 1987-05-29 | Hitachi Ltd | Fuel injecting device |
| JPS63158583U (en) * | 1987-04-06 | 1988-10-18 | ||
| JPS63182276U (en) * | 1987-05-15 | 1988-11-24 |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0331576A (en) * | 1989-06-28 | 1991-02-12 | Fuji Injiekuta Kk | Injector housing for fuel distribution |
| US5372113A (en) * | 1994-01-25 | 1994-12-13 | Siemens Automotive L.P. | Weir control of fuel level in a fuel rail tube for reducing the risk of hydra-lock |
| JP2014122637A (en) * | 2005-03-03 | 2014-07-03 | Robert Bosch Gmbh | Fuel injection device |
| JP2017014961A (en) * | 2015-06-30 | 2017-01-19 | 株式会社クボタ | Fuel injection engine |
| WO2020154153A1 (en) * | 2019-01-24 | 2020-07-30 | Caterpillar Inc. | Fuel rail |
| US10794346B2 (en) | 2019-01-24 | 2020-10-06 | Caterpillar Inc. | Fuel rail |
| CN113302393A (en) * | 2019-01-24 | 2021-08-24 | 卡特彼勒公司 | Fuel rail |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2797353B2 (en) | 1998-09-17 |
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| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |