JPH10176783A - Common rail - Google Patents
Common railInfo
- Publication number
- JPH10176783A JPH10176783A JP9013140A JP1314097A JPH10176783A JP H10176783 A JPH10176783 A JP H10176783A JP 9013140 A JP9013140 A JP 9013140A JP 1314097 A JP1314097 A JP 1314097A JP H10176783 A JPH10176783 A JP H10176783A
- Authority
- JP
- Japan
- Prior art keywords
- rail
- hole
- flow passage
- main pipe
- branch joint
- 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
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L41/00—Branching pipes; Joining pipes to walls
- F16L41/02—Branch units, e.g. made in one piece, welded, riveted
-
- 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
- F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
- F02M55/004—Joints; Sealings
- F02M55/005—Joints; Sealings for high pressure conduits, e.g. connected to pump outlet or to injector inlet
-
- 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
- F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
- F02M55/02—Conduits between injection pumps and injectors, e.g. conduits between pump and common-rail or conduits between common-rail and injectors
- F02M55/025—Common rails
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Branch Pipes, Bends, And The Like (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、一般にディーゼル
内燃機関における１０００ｋｇｆ／ｃｍ２以上にもおよ
び、かつ脈動する高圧流体を供給する高圧燃料多岐管或
いはブロック・レール等のようなコモンレールに関する
ものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a common rail such as a high-pressure fuel manifold or a block rail for supplying a pulsating high-pressure fluid which generally exceeds 1000 kgf / cm 2 in a diesel internal combustion engine. .
【０００２】[0002]
【従来の技術】従来、この種のコモンレールとしては例
えば図７（Ａ）に示すように、本管レール１１側の周壁
部に設けた内部の流通路１１−１に通ずる貫孔１１−２
部を外方に開口する受圧座面１１−３となし、該受圧座
面附近の本管レール１１の外周部を囲繞するリング状の
分岐継手１３の使用により、前記受圧座面１１−３に、
端部に先細円錐状の挫屈成形による拡径した枝管１２側
の接続頭部１２−２のなす押圧座面１２−３を当接係合
せしめ、該分岐継手に突設した螺子壁１３−１部と予め
枝管１２側に組込んだナット１４の螺合による前記接続
頭部１２−２首下での押圧に伴って締着して接続してな
るものが知られている。また、従来のコモンレールは図
７（Ｂ）に示すごとくすべて本管レール１１の流通路１
１−１の中心と枝管１２の流路１２−１の中心とが一致
した構造となっている。１５はスリーブ・ワッシャーで
ある。2. Description of the Related Art Conventionally, as a common rail of this type, for example, as shown in FIG. 7A, a through-hole 11-2 communicating with an internal flow passage 11-1 provided in a peripheral wall portion on the main pipe rail 11 side.
The pressure receiving seat surface 11-3 is formed to open outwardly, and the pressure receiving seat surface 11-3 is formed on the pressure receiving seat surface 11-3 by using a ring-shaped branch joint 13 surrounding the outer peripheral portion of the main pipe rail 11 near the pressure receiving seat surface. ,
A press seating surface 12-3 formed by a connection head 12-2 on the side of the branch pipe 12 whose diameter is expanded by tapering conical buckling molding is brought into contact with an end portion, and a screw wall 13 protruding from the branch joint is engaged. It is known that the connection portion is fastened and connected with the connection head 12-2 by pressing under the neck of the connection head 12-2 by screwing a part-1 and a nut 14 previously assembled on the branch pipe 12 side. In addition, as shown in FIG.
The structure is such that the center of 1-1 and the center of the flow path 12-1 of the branch pipe 12 coincide. Reference numeral 15 denotes a sleeve washer.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、このよ
うな従来の技術による接続構造としては、前記リング状
の分岐継手１３の使用により接続部での製品重量を著し
く増すこととなり、製品重量を軽減できないという難点
があり、また、前記リング状の分岐継手は本管レール１
１に単に外嵌されている構造となっているので、振動や
衝撃等により該分岐継手が管軸方向に位置ずれする可能
性があり、かつこの位置ずれが緩みを招いて洩れを誘発
してその接続を不安定となす等の問題を有するものであ
った。However, in such a connection structure according to the prior art, the use of the ring-shaped branch joint 13 significantly increases the product weight at the connection portion, and the product weight cannot be reduced. In addition, the ring-shaped branch joint has a main rail 1
1, the branch joint may be displaced in the axial direction of the pipe due to vibration, impact, and the like, and this displacement may cause looseness and induce leakage. There are problems such as making the connection unstable.
【０００４】また、本管レール１１の流通路１１−１の
中心と枝管１２の流路１２−１の中心とが一致した構造
となっていることにより、本管レール１１に内圧が作用
したとき枝管１２の流路１２−１の本管レール流通路１
１−１開口端部Ｐに最も大きな応力が発生し、前記開口
端部Ｐが起点となって変形や疲労による亀裂が生じ易
く、燃料の洩れを招く可能性があった。Further, since the center of the flow passage 11-1 of the main pipe rail 11 coincides with the center of the flow path 12-1 of the branch pipe 12, internal pressure acts on the main rail 11. When the main rail flow path 1 of the flow path 12-1 of the branch pipe 12
1-1 The largest stress is generated at the opening end P, and the opening end P serves as a starting point to easily cause cracks due to deformation or fatigue, which may lead to fuel leakage.
【０００５】本発明は従来技術の有する前記問題に鑑み
てなされたものであり、分岐継手を軽量、コンパクト化
することにより製品重量の軽減をはかるとともに、分岐
継手の位置ずれの問題を解消し長期に亘って相互の接続
部での緩みによる洩れをなくし、確実にして安定した、
しかも簡易に接続することができ、さらに枝管の流路の
本管レール開口端縁部に発生する最大応力値を下げて内
圧疲労強度をより向上させることが可能なコモンレール
を提供しようとするものである。The present invention has been made in view of the above-mentioned problems of the prior art, and aims to reduce the weight of the product by making the branch joint lighter and more compact, and to solve the problem of positional displacement of the branch joint and to achieve a long-term operation. To prevent leakage due to loosening at the mutual connection, and to ensure stable and stable
In addition, a common rail that can be easily connected and that can further improve the internal pressure fatigue strength by lowering the maximum stress value generated at the edge of the main pipe rail opening of the branch pipe flow path. It is.
【０００６】[0006]
【課題を解決するための手段】本発明に係る第１のコモ
ンレールは、軸芯内部に流通路を有する本管レールの軸
方向の周壁部に間隔を保持して複数の貫孔を設け、かつ
該貫孔にそれぞれ分岐継手を接続してなるコモンレール
において、前記本管レール側の貫孔を流通路の径方向に
偏心させるとともに該貫孔を外方に開口する嵌合凹部と
なし、該嵌合凹部に内部の流路に連って外方へ開口する
受圧座面を有しかつ外周面に螺子面を設けて構成した分
岐継手を嵌合せしめるとともに当該嵌合部分をさらにろ
う着して本管レールに取付けて構成したことを要旨とす
るものである。A first common rail according to the present invention is provided with a plurality of through holes at intervals in an axial peripheral wall portion of a main rail having a flow passage inside a shaft core, and In the common rail formed by connecting a branch joint to each through hole, the through hole on the main pipe rail side is eccentric in the radial direction of the flow passage, and the fitting hole is formed as a fitting recess that opens outward. The fitting recess is fitted with a branch joint having a pressure receiving seat surface that opens outward following the internal flow path and is provided with a screw surface on the outer peripheral surface, and the fitting portion is further brazed. The gist of the invention is that it is attached to a main rail.
【０００７】また、同第２のコモンレールは、前記本管
レール側の貫孔を流通路の径方向に偏心させるとともに
該貫孔を外方に開口する嵌合凹部となし、内部の流路に
連って外方へ開口する受圧座面を有しかつ外周面に螺子
面を設けて構成した分岐継手の基端部を前記嵌合凹部に
螺合締着するとともに相互の螺合部分をさらにろう着し
て本管レールに取付けて構成したことを要旨とする。Further, the second common rail has a fitting recess which eccentricizes the through hole on the side of the main rail in the radial direction of the flow passage and opens the through hole outward. The base end of a branch joint having a pressure receiving seat surface which is successively opened outward and provided with a screw surface on the outer peripheral surface is screwed and fastened to the fitting recess, and the mutual screwed portion is further formed. The gist is that it is brazed and attached to the main rail.
【０００８】さらに、同第３のコモンレールは、前記本
管レール側の貫孔を流通路の径方向に偏心させるととも
に該貫孔の周面部に外方へ開口する受圧座面を形成し、
筒状のスリーブニップルで構成した分岐継手を前記受圧
座面付近の本管レールの外周壁に形成した嵌合溝に嵌合
するとともに該嵌合部分をさらにろう着して本管レール
に取付けて構成したことを要旨とする。[0008] Further, the third common rail decenters the through hole on the main pipe rail side in the radial direction of the flow passage, and forms a pressure receiving seat surface that opens outward on the peripheral surface of the through hole.
A branch joint formed of a tubular sleeve nipple is fitted into a fitting groove formed on the outer peripheral wall of the main pipe rail near the pressure receiving seat surface, and the fitting portion is further brazed and attached to the main pipe rail. The gist is that it has been configured.
【０００９】さらにまた、同第４のコモンレールは、前
記本管レール側の貫孔を流通路の径方向に偏心させると
ともに該貫孔の周面部に外方へ開口する受圧座面を形成
し、筒状のスリーブニップルで構成した分岐継手を前記
受圧座面付近の本管レールに形成した嵌合溝に螺合締着
するとともに相互の螺合部分をさらにろう着して本管レ
ールに取付けて構成したことを要旨とする。なお、本発
明における貫孔は断面真円形の形状を有するものであ
る。Further, in the fourth common rail, the through hole on the side of the main pipe rail is eccentric in the radial direction of the flow passage, and a pressure receiving seat surface which opens outwardly on the peripheral surface of the through hole is formed. A branch joint composed of a tubular sleeve nipple is screwed and fastened to a fitting groove formed in the main pipe rail near the pressure receiving seat surface, and the mutually screwed portions are further brazed and attached to the main pipe rail. The gist is that it has been configured. The through-hole in the present invention has a perfectly circular cross section.
【００１０】本発明においては、上述の通り本管レール
に設けた貫孔の中心を流通路の径方向に偏心させて、本
管レール流通路の中心から径方向に見て本管レール開口
端縁部の形状が、孔の長径方向を本管レールの管径方向
に向けた楕円形としたのは本発明者が多くの実験を繰返
して得られた結果に基づくものである。In the present invention, the center of the through hole provided in the main rail is eccentric in the radial direction of the flow passage as described above, and the open end of the main rail is viewed radially from the center of the main rail flow passage. The shape of the edge portion is made elliptical with the major axis of the hole oriented in the radial direction of the main pipe rail, based on the results obtained by the present inventor repeating many experiments.
【００１１】すなわち、本発明者は、前記の貫孔の本管
レール開口端縁部に発生する最大応力値の低減を目的と
して、実際のコモンレールの本管レールに使用される断
面円形の本管レールを供試材に使用し、その供試材に真
円形と楕円形状の貫孔を設け、真円形の貫孔を設けた供
試材については該貫孔を流通路の径方向に偏心させたも
のと、該貫孔を流通路の中心と一致させたものとを準備
し、また楕円孔については孔の長径方向の向きを本管レ
ールの管軸方向に設けたものを準備し、それぞれの供試
材の前記貫孔に分岐継手を接続して、試料用コモンレー
ルを調製した。That is, the present inventor has proposed a main pipe having a circular cross section used for an actual main rail of a common rail for the purpose of reducing the maximum stress value generated at the opening edge of the main rail opening of the through hole. A rail is used as a test material, and a true circular and an elliptical through hole are provided in the test material.For the test material having a true circular through hole, the through hole is eccentric in the radial direction of the flow passage. And a hole in which the through-hole is aligned with the center of the flow passage, and an elliptical hole in which the major axis direction of the hole is provided in the pipe axis direction of the main pipe rail is prepared. A branch joint was connected to the through hole of the test material of No. 1 to prepare a sample common rail.
【００１２】このように調製した各試料用コモンレール
に内圧をかけた場合のそれぞれの応力集中部と最大応力
値を調べた。その結果、断面形状が真円形の貫孔を断面
円形の本管レールの流通路の中心と一致させて設けたコ
モンレールの場合には、前記したごとく当該貫孔の開口
部の管軸方向両端縁部に大きな応力が発生したのに対
し、本管レールの貫孔の中心を流通路の径方向に偏心さ
せて、本管レール流通路の中心から径方向に見て本管レ
ール開口端縁部の形状が、孔の長径方向を本管レールの
管径方向に向けた楕円形としたコモンレールの場合に
は、当該楕円形の本管レール内周側開口部の管軸方向両
端縁部に前記真円形の貫孔を断面円形の本管レールの流
通路の中心と一致させたコモンレールの場合の応力値よ
りはるかに低い応力値に減少できた。なお、楕円孔で
も、孔の向き（長径方向）を断面円形の本管レールの管
軸方向に形成したコモンレールの場合には、該貫孔の本
管レール内周側開口端縁部に前記真円形の貫孔を断面円
形の本管レールの流通路の中心と一致させたコモンレー
ルの場合よりも遥かに大きな応力が発生し、全く採用で
きないことが判明した。Each of the stress concentration portions and the maximum stress value when the internal pressure was applied to each sample common rail prepared as described above were examined. As a result, in the case of a common rail in which a through hole having a true circular cross section is provided so as to coincide with the center of a flow passage of a main pipe rail having a circular cross section, as described above, both ends of the opening of the through hole in the pipe axis direction are provided. When a large stress is generated in the part, the center of the through hole of the main rail is eccentric in the radial direction of the flow path, and the main rail opening edge is viewed radially from the center of the main rail flow path. In the case of a common rail having an elliptical shape in which the major axis direction of the hole is oriented in the pipe radial direction of the main pipe rail, the shape of the elliptical main pipe rail inner peripheral side opening portion in the pipe axial direction both ends is the above-mentioned shape. The stress value can be reduced to a value much lower than the stress value in the case of the common rail in which the perfect circular through hole is aligned with the center of the flow passage of the main rail having a circular cross section. In the case of a common rail in which the direction of the hole (the major axis direction) is formed in the tube axis direction of the main tube rail having a circular cross section, the above-mentioned true hole is also provided on the inner peripheral side opening edge of the through hole of the main tube rail. It was found that a much larger stress was generated than in the case of the common rail in which the circular through hole was aligned with the center of the flow passage of the main rail having a circular cross section, and it was found that it could not be adopted at all.
【００１３】上記のごとく、本管レールの貫孔の中心を
流通路の径方向に偏心させることにより、該貫孔の本管
レール流通路開口端縁部に発生する最大応力値を下げ内
圧疲労強度を向上させることができた。As described above, by eccentricizing the center of the through hole of the main pipe rail in the radial direction of the flow passage, the maximum stress value generated at the opening end of the main rail flow passage is reduced. Strength could be improved.
【００１４】また、本発明では本管レールの外周壁の一
部に突設した分岐継手を用いた凹凸嵌合方式および螺着
方式、さらにはその凹凸嵌合部分および螺着部分のろう
着による接続構造により、枝管の分岐継手の小型軽量化
とコンパクト化がはかられるとともに、分岐継手の位置
ずれも全くなくなり、長期に亘って相互の接続部での緩
みをなくして確実にして安定した、しかも簡易に接続す
ることができることとなる。Further, in the present invention, an uneven fitting method and a screwing method using a branch joint protruding from a part of the outer peripheral wall of the main pipe rail, and furthermore, a brazing of the uneven fitting portion and the screwing portion are performed by brazing. With the connection structure, the branch joint of the branch pipe can be made smaller, lighter and more compact, and there is no displacement of the branch joint at all. In addition, the connection can be made easily.
【００１５】[0015]
【発明の実施の形態】図１は本発明の請求項１に対応す
るコモンレールにおける枝管の接続部の拡大断面図、図
２は本発明の請求項２に対応する図１相当図、図３は本
発明の請求項３に対応する図１相当図、図４は本発明の
請求項４に対応する図１相当図、図５は本発明のさらに
他のコモンレールにおける枝管の接続部を例示したもの
で、（Ａ）は縦断面図、（Ｂ）は（Ａ）の本管レールの
流通路の中心から径方向に見た貫孔の開口端縁部形状を
示す図、図６は本発明のさらに別のコモンレールにおけ
る枝管の接続部を例示したもので、（Ａ）は縦断面図、
（Ｂ）は（Ａ）の本管レールの流通路の中心から径方向
に見た貫孔の開口端縁部形状を示す図であり、１はコモ
ンレールとしての本管レール、２は枝管、３、１３は分
岐継手、４、１４はスリーブニップル、５は袋ナット、
１５はナットである。FIG. 1 is an enlarged sectional view of a connecting portion of a branch pipe in a common rail according to a first embodiment of the present invention, FIG. 2 is a diagram corresponding to FIG. 1 corresponding to a second embodiment of the present invention, and FIG. Is a diagram corresponding to FIG. 1 corresponding to claim 3 of the present invention, FIG. 4 is a diagram corresponding to FIG. 1 corresponding to claim 4 of the present invention, and FIG. 5 exemplifies a connection portion of a branch pipe in still another common rail of the present invention. (A) is a longitudinal sectional view, (B) is a diagram showing the shape of the opening edge of the through-hole viewed from the center of the flow passage of the main rail in (A) in the radial direction, and FIG. FIG. 6A is a diagram illustrating a connecting portion of a branch pipe in yet another common rail according to the present invention, wherein FIG.
(B) is a diagram showing the shape of the opening end edge of the through-hole viewed from the center of the flow passage of the main rail in (A), wherein 1 is a main rail as a common rail, 2 is a branch pipe, 3, 13 are branch joints, 4, 14 are sleeve nipples, 5 is cap nuts,
Reference numeral 15 denotes a nut.
【００１６】コモンレールとしての本管レール１は、管
径３０ｍ／ｍ程度以下の圧力配管用炭素鋼管あるいはス
テンレス鋼管などの厚肉鋼管材からなるものであって、
例えば管径２０ｍ／ｍ、肉厚８ｍ／ｍの、材質ＳＴＳ
４８０の比較的厚肉の金属管であって、その軸芯内部を
流通路１−１となして軸方向の周壁部に間隔を保持し
て、本管レール１の流通路１−１の中心と△ｌ偏心して
連通する貫孔１−２、１−１２、１−２２、１−３２を
設けている。ここで、各貫孔の偏心量△ｌとしては、特
に限定するものではなく、図１乃至図４に示すごとく本
管レール１の流通路１−１の内壁面の接線と各貫孔１−
２、１−１２、１−２２、１−３２の外側の内壁面の接
線がほぼ一致する程度とすることができる。なお各貫孔
１−２、１−１２、１−２２、１−３２の大きさは燃料
の最大噴射量、噴射圧力、脈動周波数、圧力変動幅、本
管レール１の直径、肉厚等に応じて適宜定める。The main pipe rail 1 as a common rail is made of a thick steel pipe material such as a carbon steel pipe for pressure piping or a stainless steel pipe having a pipe diameter of about 30 m / m or less.
For example, material STS having a pipe diameter of 20 m / m and a wall thickness of 8 m / m
480, a relatively thick metal pipe having a shaft core formed as a flow passage 1-1 and having an axially circumferential wall having a space therebetween to maintain the center of the flow passage 1-1 of the main pipe rail 1; And through holes 1-2, 1-12, 1-22, 1-32 which are eccentrically communicated with each other. Here, the amount of eccentricity Δl of each through-hole is not particularly limited, and as shown in FIGS. 1 to 4, the tangent to the inner wall surface of the flow passage 1-1 of the main pipe rail 1 and each through-hole 1−
The tangents of the inner wall surfaces on the outer sides of 2, 1-12, 1-22, and 1-32 can be substantially matched. The size of each through hole 1-2, 1-12, 1-22, 1-32 depends on the maximum injection amount of fuel, injection pressure, pulsation frequency, pressure fluctuation width, diameter of main pipe rail 1, wall thickness, etc. It will be determined accordingly.
【００１７】図１に示す接続構造は、本管レール１の流
通路１−１の中心と△ｌ偏心して連通する貫孔１−２を
外方に開口する嵌合凹部１−２′となし、この嵌合凹部
１−２′にニップルタイプの分岐継手３を嵌合するとと
もに該嵌合部をろう着して本管レール１に接続する。こ
の分岐継手３は、内部の流路３−１に連って外方へ開口
する受圧座面３−２を有し、かつ外周面に螺子面３−３
を設けてなり、この分岐継手３の基部を前記嵌合凹部１
−２′に嵌合、ろう着して本管レール１に取着するもの
である。なお、嵌合凹部１−２′の深さは燃料の最大噴
射量、噴射圧力、脈動周波数、圧力変動幅、強度や本管
レール１の直径、肉厚などに応じて適宜定める。The connection structure shown in FIG. 1 does not have a fitting recess 1-2 'that opens outward through a through hole 1-2 that communicates with the center of the flow path 1-1 of the main pipe rail 1 eccentrically. The nipple type branch joint 3 is fitted into the fitting recess 1-2 ', and the fitting portion is soldered to connect to the main rail 1. The branch joint 3 has a pressure-receiving seat surface 3-2 that opens outward following the internal flow path 3-1 and has a screw surface 3-3 on the outer peripheral surface.
And the base of the branch joint 3 is connected to the fitting recess 1.
-2 ', which is attached to the main rail 1 by brazing. The depth of the fitting recess 1-2 'is appropriately determined according to the maximum fuel injection amount, the injection pressure, the pulsation frequency, the pressure fluctuation width, the strength, the diameter and the wall thickness of the main pipe rail 1, and the like.
【００１８】枝管２は、分岐枝管あるいは分岐金具等か
らなるものであって、その内部に前記流通路１−１に通
ずる流路２−１を有してその端部に先細円錐状の挫屈成
形による拡径した接続頭部２−２のなす押圧座面２−３
を設けてなるものである。この枝管２は、従来品と同じ
ものである。The branch pipe 2 is composed of a branch branch pipe or a branch fitting, and has a flow passage 2-1 communicating with the flow passage 1-1 therein, and has a tapered conical shape at an end thereof. Pressing seat surface 2-3 formed by connection head 2-2 expanded in diameter by buckling molding
Is provided. This branch pipe 2 is the same as a conventional product.
【００１９】すなわち、図１に示す本発明の請求項１に
対応するコモンレールの接続構造は、本管レール１側の
嵌合凹部１−２′に嵌合、ろう着した分岐継手３の受圧
座面３−２に枝管側の接続頭部２−２のなす押圧座面２
−３を当接係合せしめ、該分岐継手３の螺子面３−３に
予め枝管２側に組込んだ袋ナット５を螺合せしめて締着
して構成するものである。In other words, the common rail connection structure shown in FIG. 1 according to the first aspect of the present invention is a pressure receiving seat of the branch joint 3 fitted and brazed to the fitting recess 1-2 'on the main rail 1 side. Pressing seat surface 2 formed by connecting head 2-2 on the branch pipe side on surface 3-2
-3 are abutted and engaged, and a cap nut 5 previously assembled on the branch pipe 2 side is screwed and fastened to the thread surface 3-3 of the branch joint 3.
【００２０】また、図２に示す本発明の請求項２に対応
するコモンレールの接続構造は、本管レール１に対する
分岐継手の取着方式として図１の嵌合方式に替えて螺着
方式を採用したもので、本管レール１の流通路１−１の
中心と△ｌ偏心して連通する貫孔１−１２に外方に開口
する螺合凹部１−１２′を形成し、この螺合凹部１−１
２′に分岐継手１３を螺着する方式となっている。この
分岐継手１３は、内部の流路１３−１に連って外方へ開
口する受圧座面１３−２を有し、かつ基端部外周面に螺
子面１３−３を、受圧座面１３−２側の外周面に螺子面
１３−４をそれぞれ有し、前記螺子面１３−３と１３−
４の間に締付け用の鍔部１３−５を設けてなり、この分
岐継手３の基部を前記螺合凹部１−１２′に螺合締着
し、かつ該螺合部をろう着して本管レール１に取着し、
この分岐継手１３の受圧座面１３−２に枝管２側の接続
頭部２−２のなす押圧座面２−３を当接係合せしめ、該
分岐継手１３の受圧座面側に設けた螺子面１３−４に予
め枝管２側に組込んだ袋ナット５を螺合せしめて締着し
て構成するものである。なお、螺合凹部１−１２′の深
さも燃料の最大噴射量、噴射圧力、脈動周波数、圧力変
動幅、強度や本管レール１の直径、肉厚などに応じて適
宜定める。A common rail connection structure shown in FIG. 2 according to the second aspect of the present invention employs a screw connection method instead of the connection method of FIG. A threaded recess 1-12 'opening outwardly is formed in a through hole 1-12 communicating eccentrically with the center of the flow passage 1-1 of the main pipe rail 1, and this threaded recess 1 is formed. -1
The branch joint 13 is screwed to 2 '. The branch joint 13 has a pressure-receiving seat surface 13-2 that opens outward following the internal flow path 13-1, and has a screw surface 13-3 on the outer peripheral surface of the base end, and a pressure-receiving seat surface 13-2. The screw surface 13-4 is provided on the outer peripheral surface on the -2 side, and the screw surfaces 13-3 and 13-
4, a flange 13-5 for tightening is provided, and the base of the branch joint 3 is screwed and fastened to the screwed recess 1-12 ', and the screwed portion is soldered to form a book. Attach to tube rail 1,
A pressure bearing surface 2-3 formed by the connection head 2-2 of the branch pipe 2 is brought into contact with the pressure bearing surface 13-2 of the branch joint 13 so as to abut and is provided on the pressure bearing surface side of the branch joint 13. The cap nut 5 previously assembled on the side of the branch pipe 2 is screwed to the screw face 13-4 and fastened. The depth of the threaded concave portion 1-12 'is also appropriately determined according to the maximum fuel injection amount, injection pressure, pulsation frequency, pressure fluctuation width, strength, diameter and wall thickness of the main pipe rail 1, and the like.
【００２１】次に、図３に示す本発明の請求項３に対応
するコモンレールの接続構造は、本管レール１の流通路
１−１の中心と△ｌ偏心して連通する貫孔１−２２の周
面部に外方へ開口する受圧座面１−２３を形成し、この
受圧座面１−２３の外側に該受圧座面を囲むように貫孔
１−２２と同心の適当深さの嵌合溝１−２４を設け、こ
の嵌合溝１−２４に筒状のスリーブニップル４の基端部
を凹凸嵌合させ、かつその嵌合部分をろう着して接続
し、予め枝管２側に組込んだナット１５を前記スリーブ
ニップル４の開口側に設けた螺子面４−１に螺合せしめ
て枝管２側の接続頭部２−２のなす押圧座面２−３を本
管レール１側の受圧座面１−２３に当接係合せしめ、さ
らにナット１５を締め付けて構成するものである。な
お、この接続構造においても、スリーブニップル４の螺
合溝１−２４の深さは燃料の最大噴射量、噴射圧力、脈
動周波数、圧力変動幅、強度や本管レール１の直径、肉
厚などに応じて適宜定める。Next, a common rail connection structure according to a third aspect of the present invention shown in FIG. 3 is provided with a through hole 1-22 which communicates with the center of the flow passage 1-1 of the main pipe rail 1 by eccentricity. A pressure receiving seat surface 1-23 that opens outwardly is formed in the peripheral surface portion, and fitting of an appropriate depth concentric with the through hole 1-22 outside the pressure receiving seat surface 1-23 so as to surround the pressure receiving seat surface. A groove 1-24 is provided, and the base end of the cylindrical sleeve nipple 4 is fitted into the fitting groove 1-24 with projections and depressions, and the fitting portion is brazed and connected. The assembled nut 15 is screwed onto a screw surface 4-1 provided on the opening side of the sleeve nipple 4 so that the pressing seat surface 2-3 formed by the connection head 2-2 on the branch pipe 2 side is formed on the main pipe rail 1 side. Of the pressure receiving seat surface 1-23, and the nut 15 is further tightened. Also in this connection structure, the depth of the thread engagement groove 1-24 of the sleeve nipple 4 depends on the maximum fuel injection amount, injection pressure, pulsation frequency, pressure fluctuation width, strength, diameter of the main pipe rail 1, wall thickness, etc. It is determined appropriately according to the requirements.
【００２２】また、図４に示す本発明の請求項４に対応
する枝管の接続構造は、前記スリーブニップル４と本管
レール１との接合として、凹凸嵌合方式に替えてねじに
よる螺合方式を採用し、かつその螺合締着部分をろう着
して形成するもので、スリーブニップル１４の基端部に
設けた螺子面１４−１を、本管レール１側に形成した嵌
合溝１−２４の螺面部１−２４′に螺合締着せしめ、こ
の状態で枝管２側の接続頭部２−２のなす押圧座面２−
３を本管レール１側の受圧座面１−２３に当接係合せし
め、さらにナット１５を締め付けて構成するものであ
る。FIG. 4 shows a branch pipe connecting structure according to a fourth aspect of the present invention, in which the sleeve nipple 4 and the main pipe rail 1 are joined by screws instead of a concave-convex fitting method. In this method, a screw surface 14-1 provided at the base end of the sleeve nipple 14 is formed on the side of the main rail 1 by a fitting groove. 1-24 is screwed onto the threaded surface portion 1-24 ', and in this state, the pressing seat surface 2- formed by the connection head 2-2 on the branch pipe 2 side.
3 is brought into contact with the pressure receiving seat surface 1-23 on the main pipe rail 1 side, and the nut 15 is further tightened.
【００２３】本発明は上記した図１乃至図４に示す構造
のみならず、図５および図６に示す構造とすることもで
きる。すなわち、図５は図１に示す構成と類似した構成
を有するものであるが、貫孔１−２の偏心量Δｌを本管
レールの流通路１−１の内壁面の接線が貫孔１−２の内
側の内壁面の接線より僅かに内方に位置する程度とし
て、貫孔１−２の本管レール流通路１−１開口端縁部の
形状を図５の（Ｂ）に示すように楕円形としたものであ
る。また図６は図２に示す構成と類似した構成を有する
ものであるが、本管レールの貫孔１−１２は斜めに設け
前記流通路１−１の内壁面の接線方向に向いた図５と同
様な構造とすることもできる。In the present invention, not only the structure shown in FIGS. 1 to 4 but also the structure shown in FIGS. That is, FIG. 5 has a structure similar to the structure shown in FIG. 1, but the eccentricity Δl of the through hole 1-2 is changed by the tangent of the inner wall surface of the flow passage 1-1 of the main rail. As shown in FIG. 5B, the shape of the end of the opening of the main rail flow passage 1-1 of the through-hole 1-2 is set to be slightly inward from the tangent of the inner wall surface inside the second through-hole. It is an elliptical shape. 6 has a configuration similar to the configuration shown in FIG. 2, but the through hole 1-12 of the main rail is provided obliquely and is directed in the tangential direction of the inner wall surface of the flow passage 1-1. The structure may be the same as described above.
【００２４】[0024]
【発明の効果】以上説明したごとく、本発明のコモンレ
ールは分岐継手もしくはスリーブニップルの中心を本管
レールの流通路の径方向に偏心させて本管レール流通路
の中心から径方向に見て本管レール開口端縁部の形状
が、孔の長径方向を本管レールの管径方向に向けた楕円
形としたことにより、本管レールの流通路の中心と分岐
継手もしくはスリーブニップルの流路の中心とが一致し
た接続構造の従来のコモンレールに比し、分岐継手もし
くはスリーブニップルの流路の本管レール流通路開口端
縁部に発生する最大応力を軽減することができるので、
各貫孔における内圧疲労強度が高く、耐久性に優れる。
また、本発明は本管レールの外周壁の一部に突設した分
岐継手を用いた凹凸嵌合方式および螺着方式、さらには
その凹凸嵌合部分および螺着部分のろう着による接続構
造を採用したことにより、枝管の分岐継手の小型軽量化
とコンパクト化がはかられるとともに、分岐継手の位置
ずれも全くなくなり、長期に亘って相互の接続部での緩
みをなくして確実にして安定した、しかも簡易に接続す
ることができる等、極めて有用性に富むものである。As described above, in the common rail of the present invention, the center of the branch joint or the sleeve nipple is eccentric in the radial direction of the flow passage of the main rail, and the book is viewed radially from the center of the main rail flow passage. The shape of the end edge of the pipe rail opening is made elliptical with the major axis direction of the hole facing the pipe diameter direction of the main pipe rail, so that the center of the flow passage of the main rail and the flow path of the branch joint or sleeve nipple are formed. Since the maximum stress generated at the opening edge of the main rail flow passage opening of the branch joint or the sleeve nipple flow path can be reduced as compared to the conventional common rail with a connection structure that coincides with the center,
The internal pressure fatigue strength in each through hole is high and the durability is excellent.
In addition, the present invention provides a concavo-convex fitting method and a screwing method using a branch joint protruding from a part of the outer peripheral wall of the main pipe rail, and furthermore, a connection structure by brazing the concavo-convex fitting portion and the screwed portion. By adopting this, the branch joint of the branch pipe can be made smaller, lighter and more compact, and there is no displacement of the branch joint at all. It is extremely useful because it can be easily connected.
【図１】本発明の請求項１に対応するコモンレールにお
ける枝管の接続構造例を示す一部縦断面図である。FIG. 1 is a partial longitudinal sectional view showing a connection structure example of a branch pipe in a common rail according to claim 1 of the present invention.
【図２】本発明の請求項２に対応する図１相当図であ
る。FIG. 2 is a diagram corresponding to FIG. 1 corresponding to claim 2 of the present invention;
【図３】本発明の請求項３に対応する図１相当図であ
る。FIG. 3 is a diagram corresponding to FIG. 1 corresponding to claim 3 of the present invention.
【図４】本発明の請求項４に対応する図１相当図であ
る。FIG. 4 is a diagram corresponding to FIG. 1 corresponding to claim 4 of the present invention.
【図５】本発明のさらに他のコモンレールにおける枝管
の接続部を例示したもので、（Ａ）は縦断面図、（Ｂ）
は（Ａ）の本管レールの流通路の中心から径方向に見た
貫孔の開口端縁部形状を示す図である。5A and 5B illustrate a connection portion of a branch pipe in still another common rail according to the present invention, wherein FIG. 5A is a longitudinal sectional view, and FIG.
FIG. 3A is a diagram showing the shape of the opening edge of the through hole as viewed in the radial direction from the center of the flow path of the main pipe rail in FIG.
【図６】本発明のさらに別のコモンレールにおける枝管
の接続部を例示したもので、（Ａ）は縦断面図、（Ｂ）
は（Ａ）の本管レールの流通路の中心から径方向に見た
貫孔の開口端縁部形状を示す図である。6A and 6B illustrate a connection portion of a branch pipe in still another common rail according to the present invention, wherein FIG. 6A is a longitudinal sectional view, and FIG.
FIG. 3A is a diagram showing the shape of the opening edge of the through hole as viewed in the radial direction from the center of the flow path of the main pipe rail in FIG.
【図７】従来のコモンレールを例示したもので、（Ａ）
は枝管接続部を一部破断して示す正面図、（Ｂ）は
（Ａ）のイーイ線上の縦断側面図である。FIG. 7 illustrates a conventional common rail, and (A)
FIG. 2 is a front view showing a branch pipe connection part partially broken away, and FIG. 2B is a longitudinal sectional side view taken along line E in FIG.
１ 本管レール １−１ 流通路 １−２、１−１２、１−２２、１−３２ 貫孔 １−２３、３−２、１３−２ 受圧座面 ２ 枝管 ２−１ 流路 ２−２ 接続頭部 ２−３ 押圧座面 ３、１３ 分岐継手 ４、１４ スリーブニップル ５ 袋ナット １５ ナット DESCRIPTION OF SYMBOLS 1 Main pipe rail 1-1 Flow path 1-2, 1-12, 1-22, 1-32 Through-hole 1-23, 3-2, 13-2 Pressure receiving seat surface 2 Branch pipe 2-1 Flow path 2- 2 Connection head 2-3 Press seat surface 3, 13 Branch joint 4, 14 Sleeve nipple 5 Cap nut 15 Nut
Claims (4)
軸方向の周壁部に間隔を保持して複数の貫孔を設け、か
つ該貫孔にそれぞれ分岐継手を接続してなるコモンレー
ルにおいて、前記本管レール側の貫孔を流通路の径方向
に偏心させるとともに該貫孔を外方に開口する嵌合凹部
となし、該嵌合凹部に内部の流路に連って外方へ開口す
る受圧座面を有しかつ外周面に螺子面を設けて構成した
分岐継手を嵌合せしめるとともに当該嵌合部分をさらに
ろう着して本管レールに取付けたことを特徴とするコモ
ンレール。1. A common rail in which a plurality of through holes are provided at intervals in an axial peripheral wall portion of a main pipe rail having a flow passage inside a shaft core, and a branch joint is connected to each of the through holes. A through hole on the side of the main pipe rail is eccentric in the radial direction of the flow passage, and the through hole is outwardly formed as a fitting concave portion. A common rail having a pressure receiving seat surface which is open and a branch joint formed by providing a screw surface on an outer peripheral surface, and further fitting the fitting portion to the main joint rail by brazing.
軸方向の周壁部に間隔を保持して複数の貫孔を設け、か
つ該貫孔にそれぞれ分岐継手を接続してなるコモンレー
ルにおいて、前記本管レール側の貫孔を流通路の径方向
に偏心させるとともに該貫孔を外方に開口する嵌合凹部
となし、内部の流路に連って外方へ開口する受圧座面を
有しかつ外周面に螺子面を設けて構成した分岐継手の基
端部を前記嵌合凹部に螺合締着するとともに相互の螺合
部分をさらにろう着して本管レールに取付けたことを特
徴とするコモンレール。2. A common rail in which a plurality of through holes are provided at intervals in an axial peripheral wall portion of a main pipe rail having a flow passage inside a shaft core, and a branch joint is connected to each of the through holes. A pressure receiving seat surface which eccentrically aligns the through hole on the main pipe rail side in the radial direction of the flow passage with a fitting recess which opens the through hole outward, and which opens outward following the internal flow passage; And the base end of the branch joint having an outer peripheral surface provided with a threaded surface is screwed and fastened to the fitting recess, and the mutually screwed portions are further brazed and attached to the main rail. A common rail characterized by:
軸方向の周壁部に間隔を保持して複数の貫孔を設け、か
つ該貫孔にそれぞれ分岐継手を接続してなるコモンレー
ルにおいて、前記本管レール側の貫孔を流通路の径方向
に偏心させるとともに該貫孔の周面部に外方へ開口する
受圧座面を形成し、筒状のスリーブニップルで構成した
分岐継手を前記受圧座面付近の本管レールの外周壁に形
成した嵌合溝に嵌合するとともに該嵌合部分をさらにろ
う着して本管レールに取付けたことを特徴とするコモン
レール。3. A common rail in which a plurality of through holes are provided at intervals in an axial peripheral wall portion of a main pipe rail having a flow passage inside a shaft core, and a branch joint is connected to each of the through holes. The branch joint formed by a cylindrical sleeve nipple, wherein the through hole on the main pipe rail side is eccentric in the radial direction of the flow passage and a pressure receiving seat surface that opens outwardly on the peripheral surface of the through hole is formed. A common rail fitted in a fitting groove formed in an outer peripheral wall of a main pipe rail near a pressure receiving seat surface, and furthermore, the fitting portion is further brazed to be attached to the main pipe rail.
軸方向の周壁部に間隔を保持して複数の貫孔を設け、か
つ該貫孔にそれぞれ分岐継手を接続してなるコモンレー
ルにおいて、前記本管レール側の貫孔を流通路の径方向
に偏心させるとともに該貫孔の周面部に外方へ開口する
受圧座面を形成し、筒状のスリーブニップルで構成した
分岐継手を前記受圧座面付近の本管レールに形成した嵌
合溝に螺合締着するとともに相互の螺合部分をさらにろ
う着して本管レールに取付けたことを特徴とするコモン
レール。4. A common rail in which a plurality of through holes are provided at intervals in an axial peripheral wall portion of a main pipe rail having a flow passage inside a shaft core, and branch joints are connected to the through holes, respectively. The branch joint formed by a cylindrical sleeve nipple, wherein the through hole on the main pipe rail side is eccentric in the radial direction of the flow passage and a pressure receiving seat surface that opens outwardly on the peripheral surface of the through hole is formed. A common rail, which is screwed into a fitting groove formed in a main pipe rail near a pressure receiving seat surface, and is further attached to the main pipe rail by brazing the mutually screwed portions.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9013140A JPH10176783A (en) | 1996-10-18 | 1997-01-08 | Common rail |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29767896 | 1996-10-18 | ||
| JP8-297678 | 1996-10-18 | ||
| JP9013140A JPH10176783A (en) | 1996-10-18 | 1997-01-08 | Common rail |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH10176783A true JPH10176783A (en) | 1998-06-30 |
Family
ID=26348872
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9013140A Pending JPH10176783A (en) | 1996-10-18 | 1997-01-08 | Common rail |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH10176783A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2767563A1 (en) * | 1997-08-20 | 1999-02-26 | Siemens Ag | FUEL LINE AND FUEL PUMP COMPRISING A CONNECTION HOLE |
| EP1291519A3 (en) * | 2001-09-07 | 2004-02-25 | Robert Bosch Gmbh | Injector body with tangential pressure port |
| EP1529954A1 (en) * | 2003-11-07 | 2005-05-11 | Denso Corporation | Common rail having skew delivery ports |
| US6929288B2 (en) | 2001-12-20 | 2005-08-16 | Usui Kokusai Sangyo Kaisha Limited | Connecting structure of branch connector in fuel pressure accumulating container |
| EP1137879B1 (en) * | 1999-10-07 | 2008-03-05 | Robert Bosch Gmbh | Method for machining a high pressure fuel accumulator, high pressure fuel accumulator and connector branches for using said method |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS457825Y1 (en) * | 1965-08-11 | 1970-04-14 | ||
| JPS5784362U (en) * | 1980-11-14 | 1982-05-25 | ||
| JPH0466769A (en) * | 1990-07-05 | 1992-03-03 | Nippondenso Co Ltd | High pressure fuel joint |
| JPH04175462A (en) * | 1990-11-06 | 1992-06-23 | Usui Internatl Ind Co Ltd | Connecting structure of branch connector in high pressure fuel block |
| JPH04183968A (en) * | 1990-11-16 | 1992-06-30 | Nippondenso Co Ltd | Fuel injection pump |
| JPH04134553U (en) * | 1991-05-28 | 1992-12-15 | 株式会社クボタ | Installation structure of manhole for secondary shield lining |
| JPH0725512Y2 (en) * | 1989-08-17 | 1995-06-07 | コスモ工機株式会社 | Branch plug mounting structure |
| JPH07167003A (en) * | 1993-12-15 | 1995-07-04 | Nippondenso Co Ltd | Accumulator type fuel injection device |
| JPH0740688Y2 (en) * | 1987-04-10 | 1995-09-20 | トヨタ自動車株式会社 | Injector mounting device for electronically controlled fuel injection engine |
| JPH084973A (en) * | 1994-06-15 | 1996-01-12 | Usui Internatl Ind Co Ltd | Connecting structure of branch joint for high pressure manifold |
| WO1996018062A1 (en) * | 1994-12-08 | 1996-06-13 | Usui Kokusai Sangyo Kaisha, Ltd. | Connecting construction of branch connecting body in fuel rail of high pressure |
| JP2000501477A (en) * | 1996-09-30 | 2000-02-08 | ローベルト ボツシユ ゲゼルシヤフト ミツト ベシユレンクテル ハフツング | High pressure fuel storage |
-
1997
- 1997-01-08 JP JP9013140A patent/JPH10176783A/en active Pending
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS457825Y1 (en) * | 1965-08-11 | 1970-04-14 | ||
| JPS5784362U (en) * | 1980-11-14 | 1982-05-25 | ||
| JPH0740688Y2 (en) * | 1987-04-10 | 1995-09-20 | トヨタ自動車株式会社 | Injector mounting device for electronically controlled fuel injection engine |
| JPH0725512Y2 (en) * | 1989-08-17 | 1995-06-07 | コスモ工機株式会社 | Branch plug mounting structure |
| JPH0466769A (en) * | 1990-07-05 | 1992-03-03 | Nippondenso Co Ltd | High pressure fuel joint |
| JPH04175462A (en) * | 1990-11-06 | 1992-06-23 | Usui Internatl Ind Co Ltd | Connecting structure of branch connector in high pressure fuel block |
| JPH04183968A (en) * | 1990-11-16 | 1992-06-30 | Nippondenso Co Ltd | Fuel injection pump |
| JPH04134553U (en) * | 1991-05-28 | 1992-12-15 | 株式会社クボタ | Installation structure of manhole for secondary shield lining |
| JPH07167003A (en) * | 1993-12-15 | 1995-07-04 | Nippondenso Co Ltd | Accumulator type fuel injection device |
| JPH084973A (en) * | 1994-06-15 | 1996-01-12 | Usui Internatl Ind Co Ltd | Connecting structure of branch joint for high pressure manifold |
| WO1996018062A1 (en) * | 1994-12-08 | 1996-06-13 | Usui Kokusai Sangyo Kaisha, Ltd. | Connecting construction of branch connecting body in fuel rail of high pressure |
| JP2000501477A (en) * | 1996-09-30 | 2000-02-08 | ローベルト ボツシユ ゲゼルシヤフト ミツト ベシユレンクテル ハフツング | High pressure fuel storage |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2767563A1 (en) * | 1997-08-20 | 1999-02-26 | Siemens Ag | FUEL LINE AND FUEL PUMP COMPRISING A CONNECTION HOLE |
| EP1137879B1 (en) * | 1999-10-07 | 2008-03-05 | Robert Bosch Gmbh | Method for machining a high pressure fuel accumulator, high pressure fuel accumulator and connector branches for using said method |
| EP1291519A3 (en) * | 2001-09-07 | 2004-02-25 | Robert Bosch Gmbh | Injector body with tangential pressure port |
| US6929288B2 (en) | 2001-12-20 | 2005-08-16 | Usui Kokusai Sangyo Kaisha Limited | Connecting structure of branch connector in fuel pressure accumulating container |
| US7278661B2 (en) | 2001-12-20 | 2007-10-09 | Usui Kokusai Sangyo Kaisha Limited | Connecting structure of branch connector in fuel pressure accumulating container |
| EP1529954A1 (en) * | 2003-11-07 | 2005-05-11 | Denso Corporation | Common rail having skew delivery ports |
| US7066148B2 (en) | 2003-11-07 | 2006-06-27 | Denso Corporation | Common rail having skew delivery ports |
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