JP2002089404A - Common rail - Google Patents
Common railInfo
- Publication number
- JP2002089404A JP2002089404A JP2000282197A JP2000282197A JP2002089404A JP 2002089404 A JP2002089404 A JP 2002089404A JP 2000282197 A JP2000282197 A JP 2000282197A JP 2000282197 A JP2000282197 A JP 2000282197A JP 2002089404 A JP2002089404 A JP 2002089404A
- Authority
- JP
- Japan
- Prior art keywords
- hole
- surrounding wall
- rail
- common rail
- branch
- 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
- 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
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、エンジンのコモン
レール式燃料噴射装置における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 in a common rail fuel injection system for an engine.
【０００２】[0002]
【従来の技術】図８及び図９は従来のコモンレール式燃
料噴射装置におけるコモンレール５１を示し、中心部に
レール長方向に延びる略円柱状空間をなすレール穴５２
が形成されている。レール穴５２の側部を取り囲む円筒
状の囲壁５３の複数箇所には、内側から外側へ順に、レ
ール穴５２に交差開口してレール長直角方向に延びる複
数（図示例では４つ）の分岐穴５４と、分岐穴５４より
内径の大きい連通穴５５と、テーパー状のシール面５６
とが、各々連通するように形成されている。３〜６気筒
エンジンに適用するコモンレール５１の場合、レール穴
５２の内径（直径）は８〜１２ｍｍが一般的であり、囲
壁５３の肉厚（鋼製）は８〜１２ｍｍが一般的であり、
分岐穴５４の内径（直径）は１〜３ｍｍが一般的であ
る。2. Description of the Related Art FIGS. 8 and 9 show a common rail 51 in a conventional common rail type fuel injection device, and a rail hole 52 which forms a substantially cylindrical space extending in the rail length direction at the center.
Are formed. A plurality of (four in the illustrated example) branch holes extending in the direction perpendicular to the rail length in a direction crossing the rail hole 52 sequentially from the inside to the outside at a plurality of positions of the cylindrical surrounding wall 53 surrounding the side portion of the rail hole 52. 54, a communication hole 55 having an inner diameter larger than the branch hole 54, and a tapered sealing surface 56.
Are formed so as to communicate with each other. In the case of a common rail 51 applied to a 3 to 6 cylinder engine, the inner diameter (diameter) of the rail hole 52 is generally 8 to 12 mm, and the wall thickness (made of steel) of the enclosure 53 is generally 8 to 12 mm.
The inside diameter (diameter) of the branch hole 54 is generally 1 to 3 mm.
【０００３】[0003]
【発明が解決しようとする課題】図９に矢印で示すよう
に、囲壁５３の内面と分岐穴５４の内面には加圧燃料に
よる内圧がかかり、引張応力が生じる。囲壁５３の内面
のうちでも特に分岐穴５４の開口周囲部は、両穴５２，
５４の応力が合成されるため、他の部分よりも大きい引
張応力が発生して弱所となり、内圧の変動により疲労破
壊しやすくなる。As shown by arrows in FIG. 9, an internal pressure of the pressurized fuel is applied to the inner surface of the surrounding wall 53 and the inner surface of the branch hole 54 to generate tensile stress. Of the inner surface of the enclosing wall 53, especially around the opening of the branch hole 54, both holes 52,
Since the stress of 54 is synthesized, a tensile stress greater than the other parts is generated, which becomes a weak point, and the internal pressure fluctuates easily to cause fatigue fracture.
【０００４】本発明の目的は、上記課題を解決し、囲壁
の内面のうちでも特に弱所である分岐穴の開口周囲部に
生じる引張応力を低減し、コモンレールの内圧疲労強度
を高めることができるコモンレールを提供することにあ
る。[0004] An object of the present invention is to solve the above-mentioned problems, reduce the tensile stress generated around the opening of the branch hole, which is a particularly weak point in the inner surface of the surrounding wall, and increase the internal pressure fatigue strength of the common rail. To provide a common rail.
【０００５】[0005]
【課題を解決するための手段】本願発明者らが、前記引
張応力を低減すべく種々検討したところ、従来の囲壁５
３の内周面は凹円柱面であって、分岐穴５４はこの凹円
柱面に開口しているが、開口周囲部のうちでも、特に開
口に対し凹円柱面の長さ方向に位置する２箇所の開口周
囲部５７で引張応力が大きくなり、開口に対し凹円柱面
の円弧方向に位置する箇所では引張応力がさほど大きく
ならないことが判明した。本発明はこの結果を踏まえ、
さらに検討を加えて完成したものである。Means for Solving the Problems The inventors of the present invention have made various studies to reduce the tensile stress.
The inner peripheral surface of 3 is a concave cylindrical surface, and the branch hole 54 is opened in this concave cylindrical surface. It has been found that the tensile stress increases at the opening peripheral portion 57 of the location, and the tensile stress does not increase so much at the location located in the arc direction of the concave cylindrical surface with respect to the opening. The present invention, based on this result,
It was completed after further consideration.
【０００６】本発明に係るコモンレールは、加圧燃料を
蓄積するレール穴を備え、該レール穴を取り囲む囲壁に
レール穴に開口する複数の分岐穴が形成されたコモンレ
ールにおいて、該囲壁の内面における少なくとも分岐穴
の開口周囲部を凹球面としたことを特徴とする。A common rail according to the present invention is provided with a rail hole for storing pressurized fuel, and in a common rail in which a plurality of branch holes opening to the rail hole are formed in a surrounding wall surrounding the rail hole, at least an inner surface of the surrounding wall is provided. The opening hole of the branch hole has a concave spherical surface.
【０００７】ここで、「凹球面」とは中空状球殻体の内
面と同様の面形状を持つ凹状の球面を意味し、該球面は
全球面である必要はなく、半球面あるいは一部のみ切り
出した球面でもよい。また、完全な球面に限定されず、
例えば楕円球面のようにやや変形した球面も含む。Here, the term "concave sphere" means a concave sphere having the same surface shape as the inner surface of the hollow spherical shell, and the sphere need not be a full sphere, but a hemisphere or only a part thereof. A cut spherical surface may be used. Also, it is not limited to a perfect spherical surface,
For example, a slightly deformed spherical surface such as an elliptical spherical surface is also included.
【０００８】レール穴及び囲壁の全体形状は、特に限定
されず、次の態様を例示できる。 （１）レール穴を略球状空間とし、囲壁の内面の略全体
を凹球面とし、該凹球面に分岐穴を開口させた態様。 （２）レール穴を略円柱状空間とし、該レール穴の側部
を取り囲む囲壁の内周面を凹円柱面とするとともに、該
レール穴の端部を取り囲む囲壁の内端面を凹球面とし、
該凹球面に分岐穴を開口させた態様。The overall shape of the rail hole and the surrounding wall is not particularly limited, and the following embodiments can be exemplified. (1) A mode in which the rail hole is a substantially spherical space, the substantially entire inner surface of the surrounding wall is a concave spherical surface, and a branch hole is opened in the concave spherical surface. (2) The rail hole is a substantially cylindrical space, the inner peripheral surface of the surrounding wall surrounding the side of the rail hole is a concave cylindrical surface, and the inner end surface of the surrounding wall surrounding the end of the rail hole is a concave spherical surface,
An embodiment in which a branch hole is opened in the concave spherical surface.
【０００９】また、囲壁に接合されて囲壁の一部となる
ユニオン継手の内面の一部を凹球面とし、該凹球面に分
岐穴を開口させることもできる。Further, a part of the inner surface of the union joint which is joined to the surrounding wall and becomes a part of the surrounding wall may be formed into a concave spherical surface, and a branch hole may be opened in the concave spherical surface.
【００１０】[0010]
【発明の実施の形態】まず、図１〜図５は本発明を具体
化した第一実施形態のコモンレールを示している。図５
はディーゼルエンジンのコモンレール式燃料噴射装置の
概略を示し、コモンレール１には、燃料ポンプ２を接続
するための供給パイプ３と、インジェクタ４を接続する
ためのインジェクションパイプ５（カラー、ユニオン継
手等がアッシー化されている）とが接続され、燃料ポン
プ２とインジェクタ４は電子制御装置８により制御され
る。1 to 5 show a common rail according to a first embodiment of the present invention. FIG.
1 schematically shows a common rail type fuel injection device for a diesel engine. A common rail 1 has a supply pipe 3 for connecting a fuel pump 2 and an injection pipe 5 for connecting an injector 4 (a collar, a union joint, etc. The fuel pump 2 and the injector 4 are controlled by the electronic control unit 8.
【００１１】本実施形態のコモンレール１の中心部に
は、所定量の加圧燃料を蓄積するための球状空間をなす
レール穴１１が形成されている。レール穴１１を取り囲
む囲壁１２は、２つの金属製の中空状半球体１２ａ，１
２ｂを球状に合わせてその合わせ目を気密状に溶接して
なり、よって囲壁１２の内面の全体が凹球面１４であ
る。特に限定されないが、３〜６気筒エンジンに適用す
るコモンレール１の場合、レール穴１１の内径（直径，
Ｓφ）は２５〜３５ｍｍとされ、囲壁１２の肉厚（鋼
製）は８〜１２ｍｍとされることが好ましい。A rail hole 11 which forms a spherical space for storing a predetermined amount of pressurized fuel is formed at the center of the common rail 1 of this embodiment. The surrounding wall 12 surrounding the rail hole 11 has two hollow hemispheres 12a, 1 made of metal.
The inner surface of the surrounding wall 12 is a concave spherical surface 14. Although not particularly limited, in the case of the common rail 1 applied to a 3 to 6 cylinder engine, the inner diameter (diameter,
Sφ) is preferably 25 to 35 mm, and the wall thickness (made of steel) of the surrounding wall 12 is preferably 8 to 12 mm.
【００１２】囲壁１２にはレール穴１１に開口する複数
の分岐穴１５が形成され、囲壁１２の内面における分岐
穴１５の開口周囲部１８は当然に凹球面１４である。分
岐穴１５の内径（直径）は、特に限定されないが、１〜
３ｍｍとされることが好ましい。また、囲壁１２には、
各分岐穴１５に連続して分岐穴１５より内径の大きい連
通穴１６と、該連通穴１６に連続するテーパー状のシー
ル面１７とが形成されている。シール面１７には、供給
パイプ３又はインジェクションパイプ５の端部の凸球面
状のシール面（図示略）が密着する。A plurality of branch holes 15 opening into the rail hole 11 are formed in the surrounding wall 12, and the opening peripheral portion 18 of the branch hole 15 on the inner surface of the surrounding wall 12 is naturally a concave spherical surface 14. Although the inner diameter (diameter) of the branch hole 15 is not particularly limited,
It is preferably 3 mm. In addition, the surrounding wall 12
A communication hole 16 having an inner diameter larger than that of the branch hole 15 and a tapered sealing surface 17 continuous with the communication hole 16 are formed continuously with the branch holes 15. A convex spherical sealing surface (not shown) at the end of the supply pipe 3 or the injection pipe 5 is in close contact with the sealing surface 17.
【００１３】図示例では、一方の中空状半球体１２ａに
形成された１つの分岐穴１５が供給パイプ３に対応し、
他方の中空状半球体１２ｂに形成された３つの分岐穴１
５がインジェクションパイプ５に対応するものであるが
（図５参照）、該分岐穴１５の数はエンジンの気筒数に
応じて適宜変更可能である。In the illustrated example, one branch hole 15 formed in one hollow hemisphere 12a corresponds to the supply pipe 3,
Three branch holes 1 formed in the other hollow hemisphere 12b
Reference numeral 5 corresponds to the injection pipe 5 (see FIG. 5), but the number of the branch holes 15 can be appropriately changed according to the number of cylinders of the engine.
【００１４】本実施形態のコモンレール１によれば、囲
壁１２の内面の内でも特に弱所となる分岐穴１５の開口
周囲部１８が凹球面となっているので、開口周囲部１８
に生じる引張応力を低減し、コモンレール１の内圧疲労
強度を高めることができる。図４は、本実施形態のコモ
ンレール１と、図８及び図９に示した従来例のコモンレ
ール５１とで、囲壁の厚さとレール穴の内容積とを同一
とした場合に、本実施形態の開口周囲部１８（開口に対
する位置方向に関わらない。すなわち全周略同じ。）に
生じる引張応力と、前記従来例の２箇所の開口周囲部５
７に生じる引張応力とを比較したグラフであるが、本実
施形態では従来例に対し２２％もの引張応力の低減効果
があった。According to the common rail 1 of the present embodiment, the opening peripheral portion 18 of the branch hole 15 which is a particularly weak point in the inner surface of the surrounding wall 12 has a concave spherical surface.
Can be reduced, and the internal pressure fatigue strength of the common rail 1 can be increased. FIG. 4 shows the opening of the common rail 1 of the present embodiment and the common rail 51 of the conventional example shown in FIGS. 8 and 9 when the thickness of the surrounding wall and the inner volume of the rail hole are the same. Tensile stress generated in the peripheral portion 18 (irrespective of the position direction with respect to the opening, that is, substantially the same on the entire circumference) and the two peripheral portions 5 of the conventional example.
7 is a graph comparing the tensile stress generated in Comparative Example 7 with that of the conventional example.
【００１５】また、本実施形態のコモンレール１は外形
が略球形となるので、前記従来例のコモンレール５１に
対して長さが短縮され、エンジンによっては取付スペー
スの点で有利になる。但し、本実施形態のレール穴１１
は所定量の加圧燃料を蓄積するために内径を大きくして
内容積を確保するので、本実施形態のコモンレール１は
前記従来例のコモンレール５１に対して外形は大きくな
る。Further, since the common rail 1 of the present embodiment has a substantially spherical outer shape, its length is shorter than that of the conventional common rail 51, which is advantageous in terms of mounting space depending on the engine. However, the rail hole 11 of this embodiment
Since the inner diameter is increased by accumulating a predetermined amount of pressurized fuel to secure the inner volume, the outer shape of the common rail 1 of the present embodiment is larger than that of the common rail 51 of the conventional example.
【００１６】次に、図６及び図７は第二実施形態のコモ
ンレールを示している。本実施形態のコモンレール２０
には、所定量の加圧燃料を蓄積するための略円柱状空間
をなすレール穴２１が形成されている。レール穴２１の
側部を取り囲む囲壁２２の筒壁部２２ａの内周面は凹円
柱面２３であり、レール穴２１の一端部を取り囲む囲壁
２２の端壁部２２ｂの内端面は凹球面２４である。囲壁
２２の他端部の取付穴には、ユニオン継手２５が螺合に
より接合されて囲壁２２の一部となり、該ユニオン継手
２５の内面の一部も凹球面２６となっている。特に限定
されないが、３〜６気筒エンジンに適用するコモンレー
ル２０の場合、レール穴２１の内径（直径）は１２〜１
６ｍｍとされ、囲壁２２の肉厚（鋼製）は８〜１２ｍｍ
とされることが好ましい。レール穴２１の内径が前記従
来例のレール穴５２の内径よりも大きく設定されるの
は、分岐穴１５の開口同志が接近しすぎないように凹球
面２４の面積を確保するためである。FIGS. 6 and 7 show a common rail according to a second embodiment. Common rail 20 of the present embodiment
Is formed with a rail hole 21 which forms a substantially cylindrical space for storing a predetermined amount of pressurized fuel. The inner peripheral surface of the cylindrical wall portion 22a of the surrounding wall 22 surrounding the side portion of the rail hole 21 is a concave cylindrical surface 23, and the inner end surface of the end wall portion 22b of the surrounding wall 22 surrounding one end portion of the rail hole 21 is a concave spherical surface 24. is there. A union joint 25 is screwed into a mounting hole at the other end of the surrounding wall 22 to form a part of the surrounding wall 22, and a part of the inner surface of the union joint 25 also forms a concave spherical surface 26. Although not particularly limited, in the case of the common rail 20 applied to a 3 to 6 cylinder engine, the inner diameter (diameter) of the rail hole 21 is 12 to 1
6 mm, and the wall thickness (made of steel) of the surrounding wall 22 is 8 to 12 mm
It is preferable that The reason why the inner diameter of the rail hole 21 is set to be larger than the inner diameter of the rail hole 52 of the conventional example is to secure the area of the concave spherical surface 24 so that the openings of the branch holes 15 do not approach each other.
【００１７】囲壁２２の筒壁部２２ａにはレール穴２１
に開口する複数の分岐穴１５が形成され、分岐穴１５の
開口周囲部１８は凹球面２４に位置している。ユニオン
継手２５にもレール穴２１に開口する１つ分岐穴１５が
形成され、分岐穴１５の開口周囲部１８は凹球面２６に
位置している。分岐穴１５の内径（直径）は、特に限定
されないが、１〜３ｍｍとされることが好ましい。ま
た、筒壁部２２ａ及びユニオン継手２５には、第一実施
形態と同じく各分岐穴１５に連続する連通穴１６とシー
ル面１７とが形成されている。A rail hole 21 is formed in the cylindrical wall portion 22a of the surrounding wall 22.
A plurality of branch holes 15 are formed, and the opening periphery 18 of the branch hole 15 is located on the concave spherical surface 24. The union joint 25 is also formed with one branch hole 15 opening to the rail hole 21, and the opening peripheral portion 18 of the branch hole 15 is located on the concave spherical surface 26. The inner diameter (diameter) of the branch hole 15 is not particularly limited, but is preferably 1 to 3 mm. Further, a communication hole 16 and a seal surface 17 which are continuous with each branch hole 15 are formed in the cylindrical wall portion 22a and the union joint 25 as in the first embodiment.
【００１８】図示例では、ユニオン継手２５に形成され
た１つの分岐穴１５が供給パイプ３に対応し、囲壁２２
の筒壁部２２ａに形成された４つの分岐穴１５がインジ
ェクションパイプ５に対応するものであるが（図５参
照）、該分岐穴１５の数はエンジンの気筒数に応じて適
宜変更可能である。In the illustrated example, one branch hole 15 formed in the union joint 25 corresponds to the supply pipe 3,
The four branch holes 15 formed in the cylindrical wall portion 22a correspond to the injection pipe 5 (see FIG. 5), but the number of the branch holes 15 can be appropriately changed according to the number of cylinders of the engine. .
【００１９】本実施形態のコモンレール２０によって
も、第一実施形態と同様の効果が得られる。また、本実
施形態のコモンレール２０は、筒壁部２２ａの外形が前
記従来例の囲壁５３よりも太くて短い円筒形となり、端
壁部２２ｂの外形が半球形となるので、前記従来例のコ
モンレール５１に対して長さが短縮され、エンジンによ
っては取付スペースの点で有利になる。The same effects as those of the first embodiment can be obtained by the common rail 20 of the present embodiment. In the common rail 20 of the present embodiment, the outer shape of the cylindrical wall portion 22a is thicker and shorter than the surrounding wall 53 of the conventional example, and the outer shape of the end wall portion 22b is a hemispherical shape. The length is reduced with respect to 51, which is advantageous in terms of mounting space depending on the engine.
【００２０】なお、本発明は前記実施形態に限定される
ものではなく、例えば以下のように、発明の趣旨から逸
脱しない範囲で適宜変更して具体化することもできる。It should be noted that the present invention is not limited to the above-described embodiment, and can be embodied by appropriately changing the scope of the invention as follows, for example, as follows.
【００２１】[0021]
【発明の効果】以上詳述した通り、本発明に係るコモン
レールによれば、囲壁の内面のうちでも特に弱所である
分岐穴の開口周囲部に生じる引張応力を低減し、コモン
レールの内圧疲労強度を高めることができる。As described above in detail, according to the common rail according to the present invention, the tensile stress generated around the opening of the branch hole, which is a particularly weak point in the inner surface of the surrounding wall, is reduced, and the internal pressure fatigue strength of the common rail is reduced. Can be increased.
【図１】本発明の第一実施形態に係るコモンレールの斜
視図である。FIG. 1 is a perspective view of a common rail according to a first embodiment of the present invention.
【図２】同コモンレールの断面図である。FIG. 2 is a sectional view of the common rail.
【図３】同コモンレールの囲壁の内面における分岐穴の
開口周囲部を切り取って示す斜視図である。FIG. 3 is a perspective view showing a cut-out portion around an opening of a branch hole on the inner surface of the surrounding wall of the common rail.
【図４】同開口周囲部に生じる引張応力を従来例と比較
して示すグラフである。FIG. 4 is a graph showing tensile stress generated around the opening in comparison with a conventional example.
【図５】エンジンのコモンレール式燃料噴射装置の概略
図である。FIG. 5 is a schematic diagram of a common rail fuel injection device for an engine.
【図６】第二実施形態に係るコモンレールの斜視図であ
る。FIG. 6 is a perspective view of a common rail according to a second embodiment.
【図７】同コモンレールの断面図である。FIG. 7 is a sectional view of the common rail.
【図８】従来例に係るコモンレールの断面図である。FIG. 8 is a sectional view of a common rail according to a conventional example.
【図９】（ａ）は図８の部分拡大断面図、（ｂ）は
（ａ）のＩＸｂ−ＩＸｂ断面図である。9A is a partially enlarged sectional view of FIG. 8, and FIG. 9B is a sectional view taken along line IXb-IXb of FIG.
１ コモンレール １１ レール穴 １２ 囲壁 １２ａ，１２ｂ 中空状半球体 １４ 凹球面 １５ 分岐穴 １８ 開口周囲部 ２０ コモンレール ２１ レール穴 ２２ 囲壁 ２２ａ 筒壁部 ２２ｂ 端壁部 ２３ 凹円柱面 ２４ 凹球面 ２５ ユニオン継手 ２６ 凹球面 DESCRIPTION OF SYMBOLS 1 Common rail 11 Rail hole 12 Surrounding wall 12a, 12b Hollow hemisphere 14 Concave sphere 15 Branch hole 18 Opening peripheral part 20 Common rail 21 Rail hole 22 Surrounding wall 22a Cylindrical wall part 22b End wall part 23 Concave cylindrical surface 24 Concave spherical surface 25 Union joint 26 Concave sphere
───────────────────────────────────────────────────── フロントページの続き (72)発明者 石川 鎮夫 愛知県西尾市中畑町浜田下10番地 株式会 社オティックス内 (72)発明者 丹羽 哲也 愛知県西尾市中畑町浜田下10番地 株式会 社オティックス内 (72)発明者 外薗 祐一 愛知県豊田市トヨタ町１番地 トヨタ自動 車株式会社内 Ｆターム(参考） 3G066 AA07 AB02 AC09 AD12 BA12 BA46 BA61 CB01 CB03 CD04 CD30 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Norio Ishikawa 10 Hamadashita, Nakahata-machi, Nishio City, Aichi Prefecture Inside (72) Inventor Tetsuya Niwa 10 Hamadashita, Nakahata-cho, Nishio City, Aichi Prefecture Otix Corporation (72) Inventor Yuichi Sozono 1 Toyota Town, Toyota City, Aichi Prefecture Toyota Motor Corporation F-term (reference) 3G066 AA07 AB02 AC09 AD12 BA12 BA46 BA61 CB01 CB03 CD04 CD30
Claims (4)
レール穴を取り囲む囲壁にレール穴に開口する複数の分
岐穴が形成されたコモンレールにおいて、該囲壁の内面
の少なくとも分岐穴の開口周囲部を凹球面としたことを
特徴とするコモンレール。1. A common rail having a rail hole for storing pressurized fuel and having a plurality of branch holes opened in the rail hole formed in a surrounding wall surrounding the rail hole, at least around the opening of the branch hole on the inner surface of the surrounding wall. Common rail characterized by a concave spherical surface.
の略全体を凹球面とし、該凹球面に分岐穴を開口させた
請求項１記載のコモンレール。2. The common rail according to claim 1, wherein the rail hole is a substantially spherical space, substantially the entire inner surface of the surrounding wall is a concave spherical surface, and a branch hole is opened in the concave spherical surface.
穴の側部を取り囲む囲壁の内周面を凹円柱面とするとと
もに、該レール穴の端部を取り囲む囲壁の内端面を凹球
面とし、該凹球面に分岐穴を開口させた請求項１記載の
コモンレール。3. The rail hole is a substantially cylindrical space, the inner peripheral surface of the surrounding wall surrounding the side of the rail hole is a concave cylindrical surface, and the inner end surface of the surrounding wall surrounding the end of the rail hole is a concave spherical surface. The common rail according to claim 1, wherein a branch hole is opened in the concave spherical surface.
オン継手の内面の一部を凹球面とし、該凹球面に分岐穴
を開口させた請求項１、２又は３記載のコモンレール。4. The common rail according to claim 1, wherein a part of the inner surface of the union joint which is joined to the surrounding wall and becomes a part of the surrounding wall is a concave spherical surface, and a branch hole is opened in the concave spherical surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000282197A JP2002089404A (en) | 2000-09-18 | 2000-09-18 | Common rail |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000282197A JP2002089404A (en) | 2000-09-18 | 2000-09-18 | Common rail |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2002089404A true JP2002089404A (en) | 2002-03-27 |
Family
ID=18766749
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000282197A Pending JP2002089404A (en) | 2000-09-18 | 2000-09-18 | Common rail |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2002089404A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004070193A1 (en) * | 2003-02-07 | 2004-08-19 | Robert Bosch Gmbh | High-pressure fuel accumulator |
| EP2078848A3 (en) * | 2007-11-30 | 2010-02-24 | Delphi Technologies, Inc. | Spherical tube end form for a fluid connection system |
| DE102008039924A1 (en) * | 2008-08-27 | 2010-03-04 | Continental Automotive Gmbh | Fuel high pressure storage unit for common-rail-system in diesel internal combustion engine of motor vehicle, has fluid channel whose axis is inclined around specific inclination angle in relation to axis of another channel |
| JP2010077846A (en) * | 2008-09-24 | 2010-04-08 | Usui Kokusai Sangyo Kaisha Ltd | Common rail |
| JP2011214515A (en) * | 2010-03-31 | 2011-10-27 | Honda Motor Co Ltd | Fuel supply device of v-type engine |
| CN103696890A (en) * | 2014-01-10 | 2014-04-02 | 中山职业技术学院 | High-pressure common rail pipe |
-
2000
- 2000-09-18 JP JP2000282197A patent/JP2002089404A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004070193A1 (en) * | 2003-02-07 | 2004-08-19 | Robert Bosch Gmbh | High-pressure fuel accumulator |
| EP2078848A3 (en) * | 2007-11-30 | 2010-02-24 | Delphi Technologies, Inc. | Spherical tube end form for a fluid connection system |
| US7963298B2 (en) | 2007-11-30 | 2011-06-21 | Delphi Technologies, Inc. | Spherical tube end form for a fluid connection system |
| DE102008039924A1 (en) * | 2008-08-27 | 2010-03-04 | Continental Automotive Gmbh | Fuel high pressure storage unit for common-rail-system in diesel internal combustion engine of motor vehicle, has fluid channel whose axis is inclined around specific inclination angle in relation to axis of another channel |
| JP2010077846A (en) * | 2008-09-24 | 2010-04-08 | Usui Kokusai Sangyo Kaisha Ltd | Common rail |
| JP2011214515A (en) * | 2010-03-31 | 2011-10-27 | Honda Motor Co Ltd | Fuel supply device of v-type engine |
| CN103696890A (en) * | 2014-01-10 | 2014-04-02 | 中山职业技术学院 | High-pressure common rail pipe |
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