JPH03177694A - Branch connected body connecting structure in high pressure fuel rail - Google Patents
Branch connected body connecting structure in high pressure fuel railInfo
- Publication number
- JPH03177694A JPH03177694A JP2253877A JP25387790A JPH03177694A JP H03177694 A JPH03177694 A JP H03177694A JP 2253877 A JP2253877 A JP 2253877A JP 25387790 A JP25387790 A JP 25387790A JP H03177694 A JPH03177694 A JP H03177694A
- Authority
- JP
- Japan
- Prior art keywords
- fuel rail
- branch
- pressure receiving
- pressure
- connection body
- 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
- 239000000446 fuel Substances 0.000 title claims abstract description 54
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 229910052751 metal Inorganic materials 0.000 claims description 2
- 239000002184 metal Substances 0.000 claims description 2
- 238000007789 sealing Methods 0.000 description 21
- 230000000694 effects Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000002023 wood Substances 0.000 description 2
- 229910001369 Brass Inorganic materials 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 239000010951 brass Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 229910052738 indium Inorganic materials 0.000 description 1
- APFVFJFRJDLVQX-UHFFFAOYSA-N indium atom Chemical compound [In] APFVFJFRJDLVQX-UHFFFAOYSA-N 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
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
- F16L41/04—Tapping pipe walls, i.e. making connections through the walls of pipes while they are carrying fluids; Fittings therefor
-
- 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
-
- 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
- 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
- F16L41/08—Joining pipes to walls or pipes, the joined pipe axis being perpendicular to the plane of the wall or to the axis of another pipe
- F16L41/12—Joining pipes to walls or pipes, the joined pipe axis being perpendicular to the plane of the wall or to the axis of another pipe using attaching means embracing the pipe
-
- 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
- F16L41/08—Joining pipes to walls or pipes, the joined pipe axis being perpendicular to the plane of the wall or to the axis of another pipe
- F16L41/14—Joining pipes to walls or pipes, the joined pipe axis being perpendicular to the plane of the wall or to the axis of another pipe by screwing an intermediate part against the inside or outside of the wall
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Fuel-Injection Apparatus (AREA)
- Branch Pipes, Bends, And The Like (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野〉
本発明は高圧燃料多岐管や高圧燃料ブロックのような燃
料レールにおける分岐枝管や分岐金具等のような分岐接
続体の接続構造に係り、特にディーゼル内燃機関への燃
料供給路となる１０００ｋｇ４ ／−以上の高圧燃料レ
ールにおける分岐接続体の接続構造に関する。Detailed Description of the Invention (Industrial Field of Application) The present invention relates to a connection structure for branch connections such as branch pipes and branch fittings in fuel rails such as high-pressure fuel manifolds and high-pressure fuel blocks. In particular, the present invention relates to a connection structure of a branch connection body in a high-pressure fuel rail of 1000 kg4/- or more, which serves as a fuel supply path to a diesel internal combustion engine.
（従来の技術〉
第７図は従来の高圧燃料レールとしての多岐管における
分岐接続体、例えば分岐枝管の接続構造を示すもので、
高圧燃料本管１１に管軸に対して直角方向に穿設したス
トレート孔１２に、分岐枝管１３を嵌挿した状態で相互
に溶接して接続構成したものがある。(Prior art) Fig. 7 shows a branch connection body in a manifold pipe as a conventional high-pressure fuel rail, for example, a connection structure of a branch pipe.
There is a structure in which a branch branch pipe 13 is fitted into a straight hole 12 formed in a high-pressure fuel main pipe 11 in a direction perpendicular to the pipe axis, and then welded together to connect them.
しかし、このような接続構造では１０００ｋｆ ／ｃＪ
以上に及ぶ超高流圧の繰返しの供給、並びに機関からの
加振等によって、しばしば溶接部１４の脆化による燃料
の飛散が発生し、場合によっては分岐枝管１３の離脱が
起ることもある。However, with this type of connection structure, 1000kf/cJ
Due to the repeated supply of ultra-high flow pressure and vibrations from the engine, the welded part 14 often becomes brittle, causing fuel to scatter, and in some cases, the branch pipe 13 may separate. be.
この問題を解決するために、前述の接続構造に代えて、
本管と分岐枝管とを凹凸嵌合方式によって機械的に接続
する接続構造が、本出願人によって提案されている。To solve this problem, instead of the connection structure described above,
The applicant has proposed a connection structure that mechanically connects a main pipe and a branch pipe by a concave-convex fitting method.
この提案に係る接続構造は第８図に示すように、本管１
１に穿設する分岐孔を逆円錐形の分岐孔１６とし、該分
岐孔の内周面を受圧座面となして、分岐枝管１７の接続
端部に形成した截頭円錐状の接続頭部１８を、椀状のシ
ール部材１９を介して前記受圧座面１６に押圧嵌合せし
め、ナツト２０にて緊締する方式である。The connection structure according to this proposal is as shown in Figure 8.
The branch hole drilled in 1 is an inverted conical branch hole 16, and the inner peripheral surface of the branch hole is a pressure receiving surface, and a truncated conical connection head is formed at the connecting end of the branch pipe 17. In this method, the portion 18 is press-fitted to the pressure-receiving seat surface 16 via a bowl-shaped seal member 19, and tightened with a nut 20.
（発明が解決しようとする課題〉
このような凹凸嵌合方式の接続構造の場合、前記第７図
に示す接続構造に比しシール効果は大きいが、第９図に
示すごとく、ナツト２０を締付けていくにしたがい椀状
のシール部材１９が受圧座面１６の管外面側エツジ部２
１に喰い込むとともに接続頭部１８に引張られ変形する
ため、受圧座面との間に隙間が生じることがある。また
第１０図に示すように接続頭部１８の倒れや偏心によっ
て、接続頭部１８の片側が管外面側エツジ部２１に喰い
込んで変形し、反対側の接続頭部１８が分岐孔１６から
浮いた状態となり隙間が生じ、ナツト２０を螺合して締
付はトルクを上昇させても均一な面圧が得られなくなる
。(Problems to be Solved by the Invention) In the case of such a concave-convex fitting type connection structure, the sealing effect is greater than that shown in FIG. 7, but as shown in FIG. As the bowl-shaped sealing member 19 gradually approaches the edge portion 2 of the pressure-receiving seat surface 16 on the tube outer surface side,
1 and is pulled and deformed by the connecting head 18, so a gap may be created between it and the pressure-receiving seat surface. Furthermore, as shown in FIG. 10, due to the inclination or eccentricity of the connecting head 18, one side of the connecting head 18 is deformed by digging into the tube outer edge 21, and the connecting head 18 on the other side is removed from the branch hole 16. The nut 20 is in a floating state and a gap is created, and even if the nut 20 is screwed together and the tightening torque is increased, a uniform surface pressure cannot be obtained.
これは、ナツト２０による締付はトルクが、接続頭部１
８の片側の管外面側エツジ部２１での喰い込みによって
、正常に軸力（スラスト力）として働かなくなるからで
ある。This means that the tightening torque with the nut 20 is
This is because the tube outer surface side edge portion 21 on one side of the tube 8 is bitten and does not work normally as an axial force (thrust force).
このようにして第９図及び第１０図において、シール部
材１９と受圧座面間或いは接続頭部１８の押圧座面と受
圧座面間で面圧が得られなかったり隙間が生じたりする
ことがあり、この場合隙間等から燃料が飛散して漏れが
発生し、場合によっては分岐枝管１７が離脱することも
ある。In this way, in FIGS. 9 and 10, there is no possibility that surface pressure will not be obtained or a gap will occur between the sealing member 19 and the pressure receiving surface or between the pressing surface and the pressure receiving surface of the connection head 18. In this case, fuel may scatter from the gap or the like, causing leakage, and in some cases, the branch pipe 17 may come off.
本発明は前に述べたような実情よりみて、凹凸嵌合方式
の接続構造における押圧頭部の押圧座面又はシール部材
の本管外面側エツジ部への喰い込みによる変形を防止し
、より大きなシール効果が得られる分岐接続体の接続構
造を提案することを目的とするものである。In view of the above-mentioned circumstances, the present invention prevents deformation due to the pressing seat surface of the pressing head or the sealing member biting into the edge portion on the outer surface side of the main pipe in the concave-convex fitting type connection structure, and The purpose of this paper is to propose a connection structure for a branch connection body that provides a sealing effect.
（課題を解決するための手段）
前記目的は、燃料レール内に軸方向に形成された高圧燃
料が流通する流通路の周壁に、軸方向の複数位置におい
て貫孔が形成され、該貫孔にそれぞれ前記流通路に通じ
る流路を有する分岐接続体が連設されるように、前記燃
料レールには周面方向に拡大開口した受圧座面が形成さ
れ、該受圧座面に前記分岐接続体の前記燃料レールとの
接続端部に形成された押圧頭部を当接係合させて、前記
分岐接続体を前記燃料レールに固定する高圧燃料レール
における分岐接続体の接続構造であり、前記受圧座面は
前記貫孔の軸芯を中心とする回転面に形成され、前記押
圧頭部は前記受圧座面との接触線が円形となる回転面に
形成され、前記受圧座面の頂角θ１を、前記押圧頭部の
頂角θ２よりも大きく設定することにより達成される。(Means for Solving the Problem) The object is to provide a fuel rail in which through holes are formed at a plurality of positions in the axial direction in the peripheral wall of a flow passage formed in the axial direction in the fuel rail and through which high-pressure fuel flows; A pressure receiving surface with an enlarged opening in the circumferential direction is formed in the fuel rail so that the branch connecting bodies each having a flow path communicating with the flow path are arranged in series, and the pressure receiving surface is provided with a pressure receiving surface having an enlarged opening in the circumferential direction. A connection structure for a branch connection body in a high-pressure fuel rail in which the branch connection body is fixed to the fuel rail by abutting and engaging a pressing head formed at a connection end with the fuel rail, and the pressure receiving seat is fixed to the fuel rail. The surface is formed as a rotating surface centered on the axis of the through-hole, and the pressing head is formed as a rotating surface whose contact line with the pressure-receiving surface is circular, and the apex angle θ1 of the pressure-receiving surface is , is achieved by setting the apex angle θ2 of the pressing head to be larger than θ2.
（作用〉
燃料レール側の受圧座面の頂角θ１を、分岐接続体の押
圧頭部の頂角θ２より緩かな勾配としたのは、押圧座面
又はシール部材が受圧座面に喰い込んで変形するのを防
止するためである。(Function) The reason why the apex angle θ1 of the pressure-receiving surface on the fuel rail side is made gentler than the apex angle θ2 of the pressing head of the branch connection body is because the pressure-receiving surface or the seal member digs into the pressure-receiving surface. This is to prevent deformation.
すなわち、受圧座面と押圧頭部の頂角θ１、θ２をθ１
〉θ２とすると、分岐接続体をナツトにより締付けて押
圧頭部を受圧座面に押圧嵌合させた場合、押圧座面は受
圧座面の外面側エツジ部より離れて喰い込むことがなく
、又、受圧座面と押圧頭部との間に椀状のシール部材を
介在させた場合にも、受圧座面との接触部分より内側に
しぼむように変形し押圧頭部に圧接するので、当該シー
ル部材は受圧座面の外面側エツジ部に喰い込むことがな
い。In other words, the apex angles θ1 and θ2 between the pressure receiving surface and the pressing head are θ1
〉If θ2, when the branch connection body is tightened with a nut and the pressing head is press-fitted to the pressure receiving surface, the pressing surface will not be separated from the outer edge of the pressure receiving surface and will not dig in. Even when a bowl-shaped seal member is interposed between the pressure receiving surface and the pressing head, the seal member deforms inward from the contact area with the pressure receiving surface and comes into pressure contact with the pressing head. The member does not dig into the outer edge of the pressure bearing surface.
したがって、機械的手段にてナツト又は分岐接続体を強
力に締付けた場合、締付けに伴うスラスト力が充分にシ
ール面に伝わり、押圧座面又はシール部材が受圧座面の
エツジ部に喰い込むことなく、受圧座面との間の面圧を
上げて隙間が生じることがなく、また同時に押圧座面又
はシール部材の内面が抑圧頭部に圧接するので、面圧が
均−且つ充分に上昇して、気密性が長期にわたり保持さ
れるとともに、超高流圧の急激かつ頻繁の圧力変動の繰
返しにも十分に耐え得るという優れた効果を奏する。Therefore, when a nut or a branch connection body is strongly tightened by mechanical means, the thrust force accompanying the tightening is sufficiently transmitted to the sealing surface, and the pressure bearing surface or sealing member does not dig into the edge of the pressure receiving surface. , the surface pressure between the pressure-receiving seat and the sealing member is increased, so that no gap is created, and at the same time, the pressure-receiving surface or the inner surface of the sealing member comes into pressure contact with the compression head, so the surface pressure increases evenly and sufficiently. This has the excellent effect of maintaining airtightness for a long period of time and being able to withstand repeated rapid and frequent pressure fluctuations at extremely high flow pressures.
なお、燃料レールに分岐接続体を接続する機械的手段と
しては、例えば燃料レール側に受圧座面を囲むように継
手金具を外嵌し、該継手金具に分岐接続体側の押圧頭部
を内嵌した状態で、分岐接続体側に組込んだナツトを前
記継手金具に内嵌螺合せしめて緊締する方式を採用する
ことができる。As a mechanical means for connecting the branch connection body to the fuel rail, for example, a joint fitting is externally fitted on the fuel rail side so as to surround the pressure receiving surface, and a pressing head on the branch connection body side is internally fitted into the joint fitting. In this state, it is possible to adopt a method in which a nut assembled on the branch connection body side is internally screwed into the joint fitting and tightened.
（実施例〉 以下、本発明の実施例を図面を参照して説明する。(Example> Embodiments of the present invention will be described below with reference to the drawings.
第１図及び第２図は本発明の第１の実施例を説明する図
で、第１図は要部の縦断正面図、第２図は受圧座面部の
拡大説明図である。第１図に示すように第１の実施例で
は燃料レールとして高圧燃料が流される、例えば外径２
０ｍｍ、肉厚６ｍｍの比較的肉厚の金属管からなる燃料
多岐管としての本管１が用いられている。この本管ｌに
は流通路１ａが軸芯方向に形成され、この流通路１ａに
は軸芯方向の複数個所に管壁を貫通して貫孔１ｂが形成
されている（第１図には一つの貫孔１ｂ位置のみが示さ
れている）。この貫孔１ｂの端部側には本管１の半径方
向に拡大開口し、貫孔１ｂの軸芯を中心とする、円錐面
、回転円弧面、回転楕円面、回転放物線面、回転双曲線
面等のような回転面である略円錐状の受圧座面２が形成
されている。1 and 2 are views for explaining a first embodiment of the present invention, in which FIG. 1 is a longitudinal sectional front view of the main part, and FIG. 2 is an enlarged explanatory view of the pressure receiving surface portion. As shown in FIG. 1, in the first embodiment, a fuel rail with an outer diameter of 2
A main pipe 1 is used as a fuel manifold made of a relatively thick metal pipe with a diameter of 0 mm and a wall thickness of 6 mm. A flow passage 1a is formed in the main pipe l in the axial direction, and through holes 1b are formed in the flow passage 1a at multiple locations in the axial direction, penetrating the pipe wall (see FIG. 1). Only one through-hole 1b position is shown). The end of the through hole 1b has an enlarged opening in the radial direction of the main pipe 1, and has a conical surface, an arc of revolution surface, an ellipsoid of revolution surface, a parabolic surface of revolution, and a hyperbolic surface of revolution centered on the axis of the through hole 1b. A substantially conical pressure receiving surface 2, which is a rotating surface such as the above, is formed.
本管ｌに対して受圧座面２を囲繞して継手金具６が設け
られ、この継手金具６には螺子孔６ａが形成されている
。A joint fitting 6 is provided to the main pipe 1 so as to surround the pressure receiving surface 2, and a screw hole 6a is formed in the joint fitting 6.
第１の実施例は分岐接続体として、軸芯に流路３ａが貫
設され、且つ端部に押圧頭部４が形成されている分岐枝
管３が用いられ、この分岐枝管３が椀状のシール部材５
を介して、前記受圧座面２に押圧頭部４の押圧座面４−
１を圧接して、前記螺子孔６ａ内にワッシャ８を介して
締結ナツト７により締付は配置されている。前記押圧座
面４−１は受圧座面２に対応して同様な形状の回転面に
形成されている。In the first embodiment, a branch pipe 3 having a flow passage 3a extending through its axis and a pressing head 4 formed at the end is used as a branch connection body. shaped seal member 5
The pressing bearing surface 4- of the pressing head 4 is connected to the pressure receiving bearing surface 2 through
1 is pressed into contact with the screw hole 6a, and is tightened by a fastening nut 7 through a washer 8. The pressing seat surface 4-1 is formed into a rotating surface having the same shape as the pressure receiving surface 2.
なお、実施例としては椀状のシール部材５を設けた例を
示したが、かかるシール部材がなく押圧座面４−１が露
出したものも本発明の範囲にあることは当然で゛ある。Although an example in which a bowl-shaped sealing member 5 is provided has been shown as an embodiment, it is natural that an arrangement in which such a sealing member is not provided and the pressing seat surface 4-1 is exposed is also within the scope of the present invention.
そして、第↑の実施例においては、第２図に示すように
、受圧座面２の頂角θ１が、押圧頭部４の頂角θ２より
も大きくθ２〈θ１ となるように設定されている。In the ↑th embodiment, as shown in FIG. 2, the apex angle θ1 of the pressure-receiving seat surface 2 is set to be larger than the apex angle θ2 of the pressing head 4 such that θ2<θ1. .
なお、頂角θ１は第２図に示すように貫孔１ｂの軸芯を
通り流通路１ａの軸芯と平行な平面と受圧座面２との交
線の平均勾配をもった線の頂角（挟角〉を意味し、一方
頂角θ２は流路３ａの軸芯を含む平面と押圧座面４−１
との交線の大径側変曲点と小径側変曲点を結ぶ直線のな
す頂角（挟角〉を意味する。又、頂角θ１−θ２は５°
〜４０°とすべきであって、４０’を越えると受圧座面
２の外面側開口部が大きくなるため本管ｌの剛性が低下
すると共に、大型の継手金具６等が必要となり且つ受圧
座面２の貫孔１ ｂ １ｆｌｌが変形し易く、一方５°
未満では分岐枝管３の多少の倒れや偏心により受圧座面
２の外面側エツジ部に喰い込みが生じ易い。前記頂角の
差は１５°〜２５°が好ましい。Note that the apex angle θ1 is the apex angle of a line that passes through the axis of the through-hole 1b and has an average slope of the intersection line of the pressure-receiving seat surface 2 with a plane parallel to the axis of the flow path 1a, as shown in FIG. (Included angle), while the apex angle θ2 is between the plane containing the axis of the flow path 3a and the pressing seat surface 4-1.
means the apex angle (included angle) formed by the straight line connecting the inflection point on the large diameter side and the inflection point on the small diameter side of the intersection line. Also, the apex angle θ1 - θ2 is 5°
The angle should be ~40°; if it exceeds 40', the outer opening of the pressure-receiving seat 2 becomes larger, which reduces the rigidity of the main pipe 1, requires large joint fittings 6, etc. The through hole 1b 1fll of surface 2 is easily deformed, while the 5°
If it is less than this, the outer edge of the pressure-receiving seat surface 2 is likely to bite due to some inclination or eccentricity of the branch pipe 3. The difference in the apex angles is preferably 15° to 25°.
前記継手金具６は短寸状の円環体又は角環体等からなり
、受圧座面２を囲繞して本管１に外嵌している。The joint fitting 6 is made of a short toric body or a square ring body, and is fitted onto the main pipe 1 so as to surround the pressure receiving surface 2 .
木管１に分岐枝管３を接続する際は、分岐枝管３の押圧
頭部４を前記継手金具６の螺子孔６ａに挿入し、椀状の
シール部材５を介して受圧座面２に嵌合させた状態で、
分岐、枝管側に組込んだ締結ナツト７を継手金具６に内
嵌螺合することにより緊締する。When connecting the branch pipe 3 to the wood pipe 1, the pressing head 4 of the branch pipe 3 is inserted into the screw hole 6a of the joint fitting 6, and is fitted into the pressure receiving surface 2 via the bowl-shaped seal member 5. In the combined state,
The fastening nut 7 installed on the side of the branch pipe is internally screwed into the joint fitting 6 to tighten it.
その時、ナツト７を締付けていくにしたがい、シール部
材５は押圧座面４−１と受圧座面２との間で挟圧される
ものの、受圧座面２の頂角θ１が押圧頭部４の頂角θ２
より大きく形成されているため、シール部材５は本管ｌ
に喰い込むことなく締付けられ、受圧座面２とシール部
材５との間、及び押圧頭部４の押圧座面４−１とシール
部材５との間の面圧が均−且つ充分に上昇して完全にシ
ールされる。At that time, as the nut 7 is tightened, the sealing member 5 is pressed between the pressure bearing surface 4-1 and the pressure receiving surface 2, but the apex angle θ1 of the pressure bearing surface 2 is Vertical angle θ2
Since it is formed larger, the sealing member 5 is larger than the main pipe l.
The surface pressure between the pressure receiving surface 2 and the sealing member 5 and between the pressing surface 4-1 of the pressing head 4 and the sealing member 5 increases evenly and sufficiently. completely sealed.
なお、シール部材５としてはインジュウム、銀、銅、真
鍮、あるいはアルミニウム等による比較的軟質の金属材
料によるものが好適である。The sealing member 5 is preferably made of a relatively soft metal material such as indium, silver, copper, brass, or aluminum.
第３図は第２の実施例の要部の縦断正面図であり、この
実施例は継手金具を設けず、本管１の流通路１ａを本管
１に偏心して穿設し、その厚肉部に流通路１ａと連通す
る貫孔１ｂ、受圧座面２及び螺子孔６ａを設けている。FIG. 3 is a longitudinal sectional front view of the main part of the second embodiment, in which the flow passage 1a of the main pipe 1 is eccentrically bored in the main pipe 1 without providing a joint fitting, and the thick wall of the main pipe 1 is eccentrically bored. A through-hole 1b communicating with the flow path 1a, a pressure-receiving seat surface 2, and a screw hole 6a are provided in the portion.
そしてこの螺子孔６ａに直接締付はナツト７を螺合して
いる。A nut 7 is directly screwed into this screw hole 6a.
第２の実施例によると、分岐接続体の組付は時に本管と
継手金具との芯出し作業を無くし、又、部品点数を減ら
して全体をコンパクトに小型化して構成することができ
る。第２の実施例のその他の部分の構成、動作及び効果
はすでに説明した第１の実施例と同一である。According to the second embodiment, when assembling the branch connection body, it is possible to eliminate the need for centering the main pipe and the joint fittings, and also to reduce the number of parts so that the entire structure can be made compact and compact. The configuration, operation, and effects of other parts of the second embodiment are the same as those of the first embodiment already described.
第４図は第３の実施例の要部の縦断正面図であり、この
第３の実施例は分岐接続体が分岐金具５゛で構成され、
燃料レールには本管が使用されている。この実施例は分
岐枝管を曲げ加工するに際し大きな曲率に伴って生ずる
他の部品との干渉を避けるために、エルボ等の分岐金具
を用いる場合や、等座弁、減衰弁、送出し弁及び吐出弁
等の機構を内設する分岐金具を使用する場合等を考慮し
てなされたものである。第３の実施例では本管１に接続
される分岐接続体が分岐金具５°で構成され、分岐金具
５°の一端には前記実施例同様の曲面が形成された押圧
頭部４を有し、分岐金具５°の外周に設けた螺子壁２１
を継手金具６の螺子孔６ａに螺合することにより本管１
の受圧座面２に分岐金具５°をシール部材５を介して係
合させている。一方分岐金具５゛の他端にはスリーブ２
２を介して袋ナツト２３を螺合することにより固定され
る分岐枝管３゛が接続される構成となっている。FIG. 4 is a longitudinal sectional front view of the main part of the third embodiment, in which the branch connection body is composed of a branch fitting 5,
Mains are used for the fuel rail. In order to avoid interference with other parts caused by large curvature when bending branch pipes, this embodiment is suitable for cases where branch fittings such as elbows are used, equal seat valves, damping valves, delivery valves, etc. This was done in consideration of the case where a branch fitting with a mechanism such as a discharge valve installed therein is used. In the third embodiment, the branch connection body connected to the main pipe 1 is composed of a branch fitting 5°, and one end of the branch fitting 5° has a pressing head 4 formed with a curved surface similar to the previous embodiment. , a screw wall 21 provided on the outer periphery of the branch fitting 5°
The main pipe 1 is screwed into the screw hole 6a of the fitting 6.
A branch fitting 5° is engaged with the pressure-receiving seat surface 2 through a seal member 5. On the other hand, the sleeve 2 is attached to the other end of the branch fitting 5.
A branch pipe 3' is connected to the branch pipe 3' which is fixed by screwing a cap nut 23 through the pipe 2'.
この第３の実施例によると本管■の長平方向に平行に分
岐枝管３°を導出することができる。According to this third embodiment, branch pipes 3° can be led out parallel to the longitudinal direction of main pipe (1).
第５図は第４の実施例の要部の縦断正面図であり、この
実施例は袋ナツト２４により分岐接続体である分岐枝管
３が、燃料レールである木管■に接続されている。この
袋ナツト２４には中央に円柱状の突出部２５が形成され
ており、袋ナツト２４の内周螺子２４°を継手金具６の
外周の螺子１６゛に螺合するに伴いこの突出部２５によ
りワッシャ２６を介して環状突出部２０ａを下方に押圧
して押圧頭部４を受圧座面２にシール部材５を介して当
接係合せしめるものである。FIG. 5 is a longitudinal sectional front view of the main part of the fourth embodiment, in which a branch pipe 3, which is a branch connection body, is connected to a wood pipe (2), which is a fuel rail, by a cap nut 24. A cylindrical protrusion 25 is formed in the center of the cap nut 24, and when the inner circumferential thread 24° of the cap nut 24 is screwed into the outer circumferential thread 16° of the joint fitting 6, this protrusion 25 is formed. The annular protrusion 20a is pressed downward through the washer 26 to bring the pressing head 4 into abutting engagement with the pressure-receiving seat surface 2 through the seal member 5.
第６図は各実施例の本管に代えて本発明の燃料レールと
して使用される燃料ブロックの説明図であり、肉厚のブ
ロック３０に高圧燃料が流される流通路３１．３２が形
成され、これらの流通路に通じる取付孔部３３ａ〜３３
ｄ、３４ａ〜３４ｄがブロック３０の表面に形成されて
いる。これらの取付孔部３３ａ・・・３４ａ・・・には
各実施例で説明した受圧座面が形成され、且つ取付孔部
３３ａ 〜３３ｄ、３４ａ〜３４ｄの内周面には螺子が
形成されている。FIG. 6 is an explanatory diagram of a fuel block used as a fuel rail of the present invention in place of the main pipe of each embodiment, in which flow passages 31 and 32 through which high-pressure fuel flows are formed in a thick block 30. Attachment holes 33a to 33 communicating with these flow paths
d, 34a to 34d are formed on the surface of the block 30. The pressure receiving surfaces described in each embodiment are formed in these mounting holes 33a...34a... There is.
この燃料ブロック３０を燃料レールとして使用する場合
には、それぞれの取付孔部３３ａ〜３３ｄ、３４ａ〜３
４ｄに対して分岐接続体を取付孔部内周の螺子に締付は
ナツトにより締付は固定する。When using this fuel block 30 as a fuel rail, each mounting hole 33a to 33d, 34a to 3
4d, the branch connection body is fastened to the screw on the inner periphery of the mounting hole using a nut.
（発明の効果〉
以上説明したごとく、本発明にかかる分岐接続体の接続
構造は、燃料レール１則の受圧座面の頂角を分岐接続体
側の押圧頭部の頂角より緩かな勾配としたことによって
、押圧座面又は受圧座面と押圧頭部との間に介在させた
シール部材か受圧座面の管外面側エツジ部に喰い込むの
を完全に防止することができるので、押圧座面又はシー
ル部材の変形防止効果によりシール面での面圧が均一に
上昇し且つ隙間の発生が皆無となり漏れを完全に防止す
ることが可能となるとともに、シール部材自体の耐久性
も大幅に向上する。(Effects of the Invention) As explained above, the connection structure of the branch connection body according to the present invention has a slope in which the apex angle of the pressure receiving surface of the fuel rail rule 1 is gentler than the apex angle of the pressing head on the branch connection body side. By doing so, it is possible to completely prevent the sealing member interposed between the pressure bearing surface or the pressure receiving surface and the pressing head from biting into the edge portion of the pressure bearing surface on the tube outer surface side. Or, due to the deformation prevention effect of the sealing member, the surface pressure on the sealing surface increases uniformly and there is no gap, making it possible to completely prevent leakage, and also greatly improving the durability of the sealing member itself. .
したがって、超高流圧の繰返しの流通のもとでの加振状
態下にあってもシール性能が低下するようなことはなく
、長期にわたり分岐接続体の接続機能が保持され、高圧
燃料レールにおける分岐接続体の接続構造として安全性
、信頼性に富むものである。Therefore, the sealing performance does not deteriorate even under vibration conditions under repeated circulation of ultra-high flow pressure, and the connection function of the branch connection body is maintained for a long period of time. It is highly safe and reliable as a connection structure for branch connections.
第１図及び第２図は本発明の第１の実施例を説明する図
で、第工図は要部の縦断正面図、第２図は受圧座面部の
拡大説明図、第３図乃至第５図はそれぞれ本発明の第２
乃至第４の実施例の要部の縦断正面図、第６図は本発明
の燃料レールとして使用される燃料ブロックの斜視説明
図、第７図及び第８図は従来の接続構造例を示す一部破
断正面図、第９図及び第１０図は従来の接続構造の変形
状態を示す説明図である。
ト・・本管、２・・・受圧座面、３・・・分岐枝管、３
ａ・・・流路、４・・・押圧頭部、４−１・・・押圧座
面、６・・・継手金具、７・・・締結ナツト。1 and 2 are diagrams for explaining the first embodiment of the present invention, where the construction drawing is a longitudinal sectional front view of the main part, FIG. 2 is an enlarged explanatory view of the pressure-receiving seat surface, and Figure 5 shows the second embodiment of the present invention, respectively.
6 is a perspective explanatory view of a fuel block used as a fuel rail of the present invention, and FIGS. 7 and 8 are views showing an example of a conventional connection structure. The partially broken front view, FIGS. 9 and 10 are explanatory diagrams showing deformed states of the conventional connection structure. G...Main pipe, 2...Pressure receiving surface, 3...Branch branch pipe, 3
a... Channel, 4... Pressing head, 4-1... Pressing seat, 6... Joint fitting, 7... Fastening nut.
Claims (6)
通する流通路の周壁に、軸方向の複数位置において貫孔
が形成され、該貫孔にそれぞれ前記流通路に通じる流路
を有する分岐接続体が連設されるように、前記燃料レー
ルには周面方向に拡大開口した受圧座面が形成され、該
受圧座面に前記分岐接続体の前記燃料レールとの接続端
部に形成された押圧頭部を当接係合させて、前記分岐接
続体を前記燃料レールに固定する高圧燃料レールにおけ
る分岐接続体の接続構造であり、前記受圧座面は前記貫
孔の軸芯を中心とする回転面に形成され、前記押圧頭部
は前記受圧座面との接触線が円形となる回転面に形成さ
れ、前記受圧座面の頂角θ＿１が、前記押圧頭部の頂角
θ＿２よりも大きく設定されていることを特徴とする高
圧燃料レールにおける分岐接続体の接続構造。(1) Through holes are formed at multiple positions in the axial direction in the peripheral wall of a flow passage formed in the axial direction in the fuel rail and through which high-pressure fuel flows, and each of the through holes has a flow passage communicating with the flow passage. A pressure receiving surface is formed on the fuel rail with an enlarged opening in the circumferential direction so that the branch connecting body is connected to the fuel rail, and a pressure receiving surface is formed on the pressure receiving surface at the connecting end of the branch connecting body with the fuel rail. This is a connection structure for a branch connection body in a high-pressure fuel rail, in which the branch connection body is fixed to the fuel rail by abutting and engaging pressing heads, and the pressure receiving surface is centered on the axis of the through hole. The pressing head is formed on a rotating surface whose contact line with the pressure receiving surface is circular, and the apex angle θ_1 of the pressure receiving surface is smaller than the apex angle θ_2 of the pressing head. A connection structure for a branch connection body in a high-pressure fuel rail, characterized in that the area is set large.
を特徴とする請求項（１）に記載の高圧燃料レールにお
ける分岐接続体の接続構造。(2) The connection structure of a branch connection body in a high-pressure fuel rail according to claim (1), wherein the apex angle θ_1 - θ_2 is 5 to 40 degrees.
岐接続体の接続構造において、分岐接続体側に組込んだ
ナット又は該分岐接続体に設けた螺子壁を燃料レール又
は燃料レールを囲繞するように設けられた継手金具の螺
子孔に締着することにより、燃料レールに分岐接続体が
接続されていることを特徴とする高圧燃料レールにおけ
る分岐接続体の接続構造。(3) In the connection structure of a branch connection body in a high-pressure fuel rail according to claim (1), a nut incorporated in the branch connection body side or a threaded wall provided on the branch connection body surrounds the fuel rail or the fuel rail. 1. A connection structure for a branch connection body in a high-pressure fuel rail, characterized in that the branch connection body is connected to the fuel rail by being fastened to a screw hole of a joint fitting provided as described above.
されていることを特徴とする請求項（１）に記載の高圧
燃料レールにおける分岐接続体の接続構造。(4) The connection structure for a branch connection body in a high-pressure fuel rail according to claim (1), wherein the pressure receiving surface is a conical surface and the pressing head is formed in a truncated conical shape.
いることを特徴とする請求項（１）に記載の高圧燃料レ
ールにおける分岐接続体の接続構造。(5) The connection structure of a branch connection body in a high-pressure fuel rail according to claim (1), wherein the branch connection body is constituted by a branch branch pipe or a branch metal fitting.
されていることを特徴とする請求項（１）に記載の高圧
燃料レールにおける分岐接続体の接続構造。(6) The connection structure of a branch connection body in a high-pressure fuel rail according to claim (1), wherein the fuel rail is composed of a fuel manifold or a fuel block.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1-251102 | 1989-09-27 | ||
| JP25110289 | 1989-09-27 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03177694A true JPH03177694A (en) | 1991-08-01 |
Family
ID=17217675
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2253877A Pending JPH03177694A (en) | 1989-09-27 | 1990-09-21 | Branch connected body connecting structure in high pressure fuel rail |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JPH03177694A (en) |
| KR (1) | KR910006657A (en) |
| DE (1) | DE4030486A1 (en) |
| GB (1) | GB2239297A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003506611A (en) * | 1999-08-03 | 2003-02-18 | 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 | Fuel high pressure accumulator |
| KR100608577B1 (en) * | 2005-09-13 | 2006-08-03 | 주식회사 두원공조 | Header of heat exchanger for vehicle |
| JP2008019980A (en) * | 2006-07-13 | 2008-01-31 | Mizuho Giken Sangyo:Kk | Hose connection pipe joint |
Families Citing this family (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4016190C2 (en) * | 1990-05-19 | 1998-08-13 | Mak Motoren Gmbh & Co Kg | Internal combustion engine with an injection system |
| JP2529032Y2 (en) * | 1990-05-22 | 1997-03-12 | 臼井国際産業株式会社 | Connection structure of branch pipe in high pressure fuel manifold |
| JP2915099B2 (en) * | 1990-06-30 | 1999-07-05 | 臼井国際産業株式会社 | Connection structure of branch connector in high pressure fuel manifold |
| CA2230742A1 (en) * | 1997-03-03 | 1998-09-03 | Usui Kokusai Sangyo Kaisha Limited | Common rail and method of manufacturing the same. |
| GB2322920B (en) * | 1997-03-03 | 2002-02-27 | Usui Kokusi Sangyo Kaisha Ltd | Common rail and method of manufacturing the same |
| US6263862B1 (en) * | 1998-03-02 | 2001-07-24 | Usui Kokusai Sangyo Kaisha Limited | Common rail and method of manufacturing the same |
| US6886537B2 (en) | 2002-07-04 | 2005-05-03 | Denso Corporation | Accumulation type fuel injection system for engine |
| EP1600626A1 (en) * | 2004-05-28 | 2005-11-30 | Siemens VDO Automotive S.p.A. | Connecting system |
| DE602005002368T2 (en) | 2005-07-08 | 2008-05-29 | C.R.F. Società Consortile per Azioni, Orbassano | Arrangement for connecting a fuel reservoir for fuel under pressure and at least one injector, for an internal combustion engine |
| SE530561C2 (en) * | 2006-11-08 | 2008-07-08 | Scania Cv Ab | Device for connecting a high-pressure line to an accumulator tank |
| DE102007019464A1 (en) * | 2007-04-25 | 2008-10-30 | Elringklinger Ag | Sealing arrangement comprises a sealing element sleeve which slides on a first end region of a connecting element and held in the assembled state with an elastic holding element in the radial direction on a region of the connecting element |
| EP1985841A1 (en) * | 2007-04-27 | 2008-10-29 | Continental Automotive GmbH | Fluid inlet arrangement for an injection valve and injection valve |
| DE102008007904B4 (en) * | 2008-02-06 | 2013-01-31 | Hugo Kern Und Liebers Gmbh & Co. Kg Platinen- Und Federnfabrik | Device for connecting an injector line to a high-pressure pipe |
| CN112475671B (en) * | 2020-10-21 | 2022-09-30 | 东方电气集团东方锅炉股份有限公司 | Take gas protection device's thin-walled tube and header angle welded assembly fixture |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB641917A (en) * | 1948-03-03 | 1950-08-23 | Mini Of Supply | Improvements in or relating to sealing devices |
| GB1272463A (en) * | 1969-08-28 | 1972-04-26 | British Aircraft Corp Ltd | Improvements relating to fluid conduit connections |
| US4521041A (en) * | 1980-04-16 | 1985-06-04 | Cox Russell C | Pipe connection |
| US4445237A (en) * | 1982-08-30 | 1984-05-01 | Partnership Of Robert M. Paul | Close coupled water-closet combination and adapter |
| DD225480A1 (en) * | 1984-04-16 | 1985-07-31 | Elbe Werk Rosslau Veb | CONNECTION PLUG FOR PRESSURE LINES, ESPECIALLY INJECTION PRESSURE LINES FOR INTERNAL COMBUSTION ENGINES |
| IT211604Z2 (en) * | 1985-12-12 | 1989-04-07 | Murray Europ | PIPE-FLANGE COUPLING WITH IRREVERSIBLE ROTATION SCREWING. |
| JPS63185988U (en) * | 1987-05-23 | 1988-11-29 |
-
1990
- 1990-09-21 JP JP2253877A patent/JPH03177694A/en active Pending
- 1990-09-26 DE DE4030486A patent/DE4030486A1/en not_active Ceased
- 1990-09-27 KR KR1019900015333A patent/KR910006657A/en not_active Application Discontinuation
- 1990-09-27 GB GB9021016A patent/GB2239297A/en not_active Withdrawn
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003506611A (en) * | 1999-08-03 | 2003-02-18 | 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 | Fuel high pressure accumulator |
| KR100608577B1 (en) * | 2005-09-13 | 2006-08-03 | 주식회사 두원공조 | Header of heat exchanger for vehicle |
| JP2008019980A (en) * | 2006-07-13 | 2008-01-31 | Mizuho Giken Sangyo:Kk | Hose connection pipe joint |
Also Published As
| Publication number | Publication date |
|---|---|
| KR910006657A (en) | 1991-04-29 |
| GB2239297A (en) | 1991-06-26 |
| DE4030486A1 (en) | 1991-04-11 |
| GB9021016D0 (en) | 1990-11-07 |
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