WO2021153105A1 - Fuel rail for gasoline direct-injection engine - Google Patents
Fuel rail for gasoline direct-injection engine Download PDFInfo
- Publication number
- WO2021153105A1 WO2021153105A1 PCT/JP2020/047947 JP2020047947W WO2021153105A1 WO 2021153105 A1 WO2021153105 A1 WO 2021153105A1 JP 2020047947 W JP2020047947 W JP 2020047947W WO 2021153105 A1 WO2021153105 A1 WO 2021153105A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- rail
- holder
- joining
- injector holder
- arc
- Prior art date
Links
Images
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
Definitions
- the present invention relates to a fuel rail for supplying high-pressure fuel supplied from a fuel pressurizing pump such as an electronic fuel injection type automobile engine via a fuel injector (injection nozzle) that directly injects high-pressure fuel into the cylinder of the engine. More specifically, the present invention relates to a fuel rail for a gasoline direct injection engine in which fuel is directly supplied from the rail to the injector.
- Patent Document 1 Conventionally, as a fuel rail for this type of gasoline direct injection engine, for example, the one described in Patent Document 1 below is known.
- Patent Document 1 gasoline direct injection provided with a plurality of injector holders (cylindrical sockets) 12 and fixing brackets 13 on a main rail 11 which is a fuel rail main body.
- the fuel rails for the engine are listed.
- 11-1 is a flow passage
- 11-1a is an inner peripheral wall surface
- 14 is a pressure sensor boss
- 15 is a plug
- 16 is an inlet collector.
- the injector holder 12 is provided with finishing holes 12-1 and horizontal holes 12-2 by cutting, as shown in FIG.
- the main rail is formed in the arcuate concave portion 12-3 for joining the holder formed in the through hole 11-2 formed in the peripheral wall portion of the cylindrical main rail 11 as the flow passage 11-1 in the axial direction. It is brazed to each other with 11.
- Temporary attachment protrusions 17 are provided in the arc-shaped concave portions 12-3 for holder joining, and temporary attachment is performed by a projection welding machine. Specifically, two temporary attachment protrusions 17 are provided by welding or the like at positions parallel to the axial direction of the arcuate surface recess 12-3 for joining the injector holder of the injector holder 12, and the temporary attachment protrusions 17 are interposed therein.
- the injector holder 12 is brought into contact with the peripheral wall portion of the rail body 11 and temporarily attached by a projection welder. After this temporary attachment and fixing, the injector holder 12 is brazed and fixed integrally with the main rail 11 by brazing in the furnace.
- the conventional fuel rail for a gasoline direct injection engine described above has the following problems. That is, the arc-shaped recess 12-3 for joining the holder of the injector holder 12 is formed by cutting or the like, but the arc-shaped recess (cut surface) 12-3 which is the contact surface with the main rail 11 Therefore, when the main rail 11 main body and the injector holder 12 are set during projection welding, the main rail main body and the injector holder are liable to be displaced in the circumferential direction due to the eccentricity.
- the injector holder 12 is used. Even if the rail adhesion is good, the center alignment of the arcuate concave portion 12-3 for joining the injector holder and the main rail 11 when the main body of the main rail 11 and the injector holder 12 are set is not accurately performed. There is a problem that the positional deviation between the rail body and the injector holder in the circumferential direction cannot be completely eliminated, and the positional accuracy of the injector holder connection portion cannot be sufficiently improved.
- the present invention has been made to solve the above-mentioned problems of the conventional fuel rail for a gasoline direct injection engine, and in particular, a fuel for a gasoline direct injection engine having a structure in which an injector holder is directly attached to the rail body. Prevents misalignment of the main rail body and injector holder in the circumferential direction due to uneven shape of the arc surface recess (cut surface) for joining the injector holder, which is the contact surface with the main rail.
- the fuel rail for a gasoline direct injection engine is a fuel rail for a gasoline direct injection engine having at least one injector holder on the main rail, and the distribution of the rail provided on the peripheral wall portion of the main rail.
- a fuel rail for a gasoline direct injection engine formed by brazing and joining the injector holders to a through hole leading to a road, four injector holders are formed in the arc-shaped recesses for joining the rail body formed in the injector holders.
- Temporary attachment protrusions are provided at the cross position, and of the four protrusions, two protrusions are located at the bottom of the arc-shaped recess for joining the holder at a position parallel to the axial direction of the main rail body.
- the remaining two protrusions are provided at the edges of the arc-shaped recess for joining the holder at a position perpendicular to the axial direction of the rail body, and the rail of the injector holder is provided through the four protrusions arranged at the cross position. It is characterized in that an arcuate concave portion for joining the main body is temporarily attached to the rail main body and then brazed and joined.
- the four injector holder temporary attachment protrusions provided in the arc-shaped recesses for joining the rail body are each due to dents caused by plastic deformation of the rail material due to punching. It is characterized in that a protruding portion protruding inside the arc-shaped concave portion for joining the rail body is formed as a protrusion.
- two of the four injector holder temporary attachment protrusions provided at the cross positions of the arc-shaped recesses for joining the rail body are the axial directions of the main rail body.
- the remaining two protrusions were provided at the bottom of the arc-shaped recess for joining the injector holder at parallel positions, and at the edge of the arc-shaped recess for joining the holder at the position perpendicular to the axial direction of the rail body. This is to prevent the displacement of the main rail body and the injector holder due to the non-uniform shape of the arcuate concave portion for joining the injector holder, and to increase the temporary attachment strength between the rail body and the injector holder.
- the method of forming the protrusion by utilizing the plastic deformation of the rail material by punching is adopted because the protrusion is not only easy to form but also said. This is because the protrusions can be easily formed at a predetermined position in an accurate and uniform shape.
- the fuel rail for a gasoline direct injection engine uses four injector holder temporary attachment protrusions provided in the arc-shaped recess for joining the rail body, and these four injector holder temporary attachment protrusions are used as the arc for joining the rail body.
- Two of the four temporary holder protrusions provided at the cross position of the planar recess and at the cross position of the arc-shaped recess for joining the rail body are parallel to the axial direction of the main rail body.
- the injector holder by improving the position accuracy of the injector holder, the current at the time of welding in the projection welding machine flows efficiently, so that power saving can be achieved. Furthermore, by adopting a method of forming the injector holder temporary attachment protrusions provided in the arc-shaped recesses for joining the rail body by plastic deformation of the rail material by punching, not only the protrusions can be easily formed.
- the protrusion can be formed at a predetermined position in an accurate and uniform shape.
- FIG. 3 is an enlarged plan view showing a part of an injector holder temporary attachment protrusion formed by punching in an arcuate surface concave portion for joining a rail body of the injector holder shown in FIG. 1. It is a top view which shows an example of the fuel rail for a gasoline direct injection engine of the same above.
- FIG. 3 is an enlarged cross-sectional view taken along the line AA of FIG. It is an enlarged front view which shows an example of the conventional injector holder of the fuel rail for a gasoline direct injection engine shown in FIG.
- the fuel rail for a gasoline direct injection engine which is the object of the improvement of the present invention, has the same configuration as the above-mentioned conventional product, but the fuel rail for a gasoline direct injection engine according to the present invention extends in the axial direction of the main rail 1.
- the injector holder 2 shown in FIGS. 1A and 1B is used to braze to the main rail 1.
- the injector holder 2 in the fuel rail for a gasoline direct injection engine according to the present invention has a cylindrical shape in which finishing holes 2-1 and lateral holes 2-2 are provided by cutting to form a flow passage 1-1 inside.
- the four holder temporary attachment protrusions 3-1a and 3-1b are provided at cross positions as shown in FIG. 1 (A).
- the four holder temporary attachment protrusions 3-1a are the holder joining arcs at positions parallel to the axial direction of the rail body of the main rail 1.
- the remaining holder temporary attachment protrusion 3-1b is located at a position perpendicular to the axial direction of the rail body of the main rail 1 and is an arcuate concave recess for joining the holder 2- It is provided on each of the edges 2-3b of 3.
- the four holder temporary attachment protrusions 3-1a and 3-1b provided on the bottom 2-3a and the edge 2-3b of the arc-shaped recess 2-3 for joining the rail body of the injector holder are enlarged in FIG.
- the rail material is plastically deformed and protrudes inside the arc-shaped recess 2-3 for joining the rail body.
- the portion is used as the holder temporary attachment protrusions 3-1a and 3-1b.
- the four holder temporary attachment protrusions 3-1a and 3-1b are used, and the four holder temporary attachment protrusions are connected to the holder joining arc surface recesses 2-3 in FIGS. 1 (A) (A).
- the reason why it was decided to be provided at the cross position as shown in B) is as shown below. That is, the number of holder temporary attachment protrusions provided in the holder joining arc surface recesses 2-3 is specified to be four in consideration of the adhesion between the injector holder 2 and the main rail 1 and the arrangement balance. ..
- the number of temporary holder protrusions may be four or more depending on the diameter (thickness) of the main rail 1 and the injector holder, the size of the protrusions, etc., but it is usually used in the present invention.
- the number of rails was set to 4 based on the fuel rails for gasoline direct injection engines.
- two of the protrusions 3-1a are arcuate concave portions for joining the injector holder at positions parallel to the axial direction of the main rail body.
- the other two protrusions 3-1b are provided on the bottom portion 2-3a of 2-3, and the edge 2-3b portion of the arc-shaped recess 2-3 for joining the holder at a position perpendicular to the axial direction of the rail body. This is to prevent the rail body and the injector holder from being displaced in the circumferential direction when the main body of the main rail 1 and the injector holder 2 are set.
- two holder temporary mounting protrusions 3-1a provided at positions parallel to the axial direction of the main rail body, and the remaining two provided at positions perpendicular to the axial direction of the main rail body.
- the holder temporary attachment protrusion 3-1b Since the contact state of the injector holder 2 with the main body of the main rail 1 is stabilized by the holder temporary attachment protrusion 3-1b, the uneven shape of the arcuate concave portion for joining the injector holder is absorbed, and the injector with respect to the main body of the main rail 1 is absorbed.
- the holder 2 By preventing the holder 2 from being displaced in the circumferential direction, it is possible to further increase the temporary attachment strength between the main rail 1 main body and the injector holder 2 by the projection welding machine.
- the two holder temporary attachment protrusions 3-1a provided at positions parallel to the axial direction of the main rail body make it possible to further increase the temporary attachment strength of the main rail body 1 and the injector holder 2.
Abstract
Provided is a fuel rail for a gasoline direct-injection engine that prevents injector holder misalignment due to an uneven shape of the main rail body joint surface of the injector holder, and has excellent precision in the position of an injection holder connecting part. This fuel rail for a gasoline direct-injection engine, which is configured by brazing the injection holder to a main rail, is characterized in that four protrusions for temporary attachment of the holder are provided in cross positions in rail-body-joining arcuate recesses formed in the injector holder, and the rail-body-joining arcuate recesses of the injector holder are brazed after being temporarily attached to the rail body via the four protrusions disposed in the cross positions.
Description
本発明は、電子燃料噴射式自動車エンジン等の燃料加圧ポンプから送給された高圧燃料をエンジンのシリンダー内に直接噴射する燃料インジェクター（噴射ノズル）を介して供給するための燃料レールに係り、より詳しくはレールからインジェクターへ直接燃料を供給するタイプにおけるガソリン直噴エンジン用燃料レールに関するものである。
The present invention relates to a fuel rail for supplying high-pressure fuel supplied from a fuel pressurizing pump such as an electronic fuel injection type automobile engine via a fuel injector (injection nozzle) that directly injects high-pressure fuel into the cylinder of the engine. More specifically, the present invention relates to a fuel rail for a gasoline direct injection engine in which fuel is directly supplied from the rail to the injector.
従来、この種のガソリン直噴エンジン用燃料レールとしては、例えば下記特許文献１に記載のものが知られている。この特許文献１には、例えば図３、図４に示すように、燃料レール本体である本管レール１１に、複数のインジェクターホルダー（筒状ソケット）１２及び固定用ブラケット１３を備えたガソリン直噴エンジン用燃料レールが記載されている。図中、１１－１は流通路、１１－１ａは内周壁面、１４は圧力センサー用ボス、１５はプラグ、１６はインレットコレクターである。
このガソリン直噴エンジン用燃料レールにおいて、インジェクターホルダー１２は、図４にその取り付け構造の断面図を示すように、仕上げ加工孔１２－１と横孔１２－２が切削加工により設けられ、内部を流通路１１－１となした円筒状の本管レール１１の軸方向にわたる周壁部に穿設した貫孔１１－２の部分に形成した当該ホルダー接合用円弧面状凹部１２－３に本管レール１１と相互にろう付け接合されている。 Conventionally, as a fuel rail for this type of gasoline direct injection engine, for example, the one described in Patent Document 1 below is known. In Patent Document 1, for example, as shown in FIGS. 3 and 4, gasoline direct injection provided with a plurality of injector holders (cylindrical sockets) 12 and fixingbrackets 13 on a main rail 11 which is a fuel rail main body. The fuel rails for the engine are listed. In the figure, 11-1 is a flow passage, 11-1a is an inner peripheral wall surface, 14 is a pressure sensor boss, 15 is a plug, and 16 is an inlet collector.
In the fuel rail for a gasoline direct injection engine, theinjector holder 12 is provided with finishing holes 12-1 and horizontal holes 12-2 by cutting, as shown in FIG. 4 in a cross-sectional view of the mounting structure thereof, and the inside is provided. The main rail is formed in the arcuate concave portion 12-3 for joining the holder formed in the through hole 11-2 formed in the peripheral wall portion of the cylindrical main rail 11 as the flow passage 11-1 in the axial direction. It is brazed to each other with 11.
このガソリン直噴エンジン用燃料レールにおいて、インジェクターホルダー１２は、図４にその取り付け構造の断面図を示すように、仕上げ加工孔１２－１と横孔１２－２が切削加工により設けられ、内部を流通路１１－１となした円筒状の本管レール１１の軸方向にわたる周壁部に穿設した貫孔１１－２の部分に形成した当該ホルダー接合用円弧面状凹部１２－３に本管レール１１と相互にろう付け接合されている。 Conventionally, as a fuel rail for this type of gasoline direct injection engine, for example, the one described in Patent Document 1 below is known. In Patent Document 1, for example, as shown in FIGS. 3 and 4, gasoline direct injection provided with a plurality of injector holders (cylindrical sockets) 12 and fixing
In the fuel rail for a gasoline direct injection engine, the
上記ガソリン直噴エンジン用燃料レールの製造工程において、インジェクターホルダー１２を本管レール１１にろう付けする際には、図５に示すようにインジェクターホルダー１２の位置精度や組み立て精度を確保するために当該ホルダー接合用円弧面状凹部１２－３に仮付け用突起１７を設けてプロジェクション溶接機による仮付けを行う。具体的には、インジェクターホルダー１２のインジェクターホルダー接合用円弧面状凹部１２－３の軸方向と平行な位置に溶接等により２個の仮付け用突起１７を設け、その仮付け用突起１７を介してインジェクターホルダー１２をレール本体１１の周壁部に当接させてプロジェクション溶接機により仮付けを行い、この仮付け固定した後に、炉中ろう付けにより本管レール１１と一体的にろう付け固着する。
In the manufacturing process of the fuel rail for a gasoline direct injection engine, when the injector holder 12 is brazed to the main rail 11, it is necessary to ensure the position accuracy and the assembly accuracy of the injector holder 12 as shown in FIG. Temporary attachment protrusions 17 are provided in the arc-shaped concave portions 12-3 for holder joining, and temporary attachment is performed by a projection welding machine. Specifically, two temporary attachment protrusions 17 are provided by welding or the like at positions parallel to the axial direction of the arcuate surface recess 12-3 for joining the injector holder of the injector holder 12, and the temporary attachment protrusions 17 are interposed therein. The injector holder 12 is brought into contact with the peripheral wall portion of the rail body 11 and temporarily attached by a projection welder. After this temporary attachment and fixing, the injector holder 12 is brazed and fixed integrally with the main rail 11 by brazing in the furnace.
しかしながら、前記した従来のガソリン直噴エンジン用燃料レールは、以下に記載する問題を有している。
即ち、インジェクターホルダー１２の該ホルダー接合用円弧面状凹部１２－３は、切削加工等により形成するが、本管レール１１との当接面である当該円弧面状凹部（カット面）１２－３の形状が不均一となりやすく、そのためプロジェクション溶接の際に行われる本管レール１１本体とインジェクターホルダー１２のセット時に該本管レール本体とインジェクターホルダーの偏心による円周方向の位置ずれが生じ易く、その位置ずれにより本管レール１１本体の円周面とインジェクターホルダー接合用円弧面状凹部１２－３間の隙間が大きくなると、インジェクターホルダー接続部の位置精度及び仮付け強度を十分に確保することが困難となる。このため、従来は前記したように、インジェクターホルダー１２のホルダー接合用円弧面状凹部１２－３の底辺部の、レール本体の軸方向と平行な位置にレール本体との溶着強度を確保するための２個の仮付け用突起１７を設け、この２個の仮付け用突起１７を介してインジェクターホルダー１２を本管レール１１に当接させてプロジェクション溶接による仮付けを行っている。
しかし、インジェクターホルダー１２のホルダー接合用円弧面状凹部１２－３の底辺部にレール本体の軸方向と平行な位置に２個の仮付け用突起１７を設けて仮付けする方法では、インジェクターホルダー１２のレール密着性は良好でも、本管レール１１本体とインジェクターホルダー１２のセット時における当該インジェクターホルダーの接合用円弧面状凹部１２－３と本管レール１１のそれぞれの中心位置合せが的確に行われず、レール本体とインジェクターホルダーの円周方向の位置ずれを完全に解消することができず、インジェクターホルダー接続部の位置精度を十分に高めることができないという問題がある。又、レール本体とインジェクターホルダーの円周方向の位置ずれが生じた状態の場合、プロジェクション溶接機における仮付け時の電流が効率よく流れないため電力費も高くついたり、後工程で行うろう付けでの適正クリアランスから外れてろう付け不良を起こすという問題がある。 However, the conventional fuel rail for a gasoline direct injection engine described above has the following problems.
That is, the arc-shaped recess 12-3 for joining the holder of theinjector holder 12 is formed by cutting or the like, but the arc-shaped recess (cut surface) 12-3 which is the contact surface with the main rail 11 Therefore, when the main rail 11 main body and the injector holder 12 are set during projection welding, the main rail main body and the injector holder are liable to be displaced in the circumferential direction due to the eccentricity. If the gap between the circumferential surface of the main rail 11 body and the arc-shaped recess 12-3 for joining the injector holder becomes large due to misalignment, it is difficult to sufficiently secure the positional accuracy and temporary attachment strength of the injector holder connection portion. It becomes. Therefore, conventionally, as described above, in order to secure the welding strength with the rail body at a position parallel to the axial direction of the rail body at the bottom of the arc-shaped recess 12-3 for joining the holder of the injector holder 12. Two temporary attachment protrusions 17 are provided, and the injector holder 12 is brought into contact with the main rail 11 via the two temporary attachment protrusions 17 to perform temporary attachment by projection welding.
However, in the method of temporarily attaching theinjector holder 12 by providing two temporary attachment protrusions 17 at positions parallel to the axial direction of the rail body at the bottom of the arc-shaped concave portion 12-3 for joining the holder, the injector holder 12 is used. Even if the rail adhesion is good, the center alignment of the arcuate concave portion 12-3 for joining the injector holder and the main rail 11 when the main body of the main rail 11 and the injector holder 12 are set is not accurately performed. There is a problem that the positional deviation between the rail body and the injector holder in the circumferential direction cannot be completely eliminated, and the positional accuracy of the injector holder connection portion cannot be sufficiently improved. In addition, if the rail body and injector holder are misaligned in the circumferential direction, the current during temporary attachment in the projection welder does not flow efficiently, resulting in high power costs, or brazing performed in a later process. There is a problem that it deviates from the proper clearance and causes poor brazing.
即ち、インジェクターホルダー１２の該ホルダー接合用円弧面状凹部１２－３は、切削加工等により形成するが、本管レール１１との当接面である当該円弧面状凹部（カット面）１２－３の形状が不均一となりやすく、そのためプロジェクション溶接の際に行われる本管レール１１本体とインジェクターホルダー１２のセット時に該本管レール本体とインジェクターホルダーの偏心による円周方向の位置ずれが生じ易く、その位置ずれにより本管レール１１本体の円周面とインジェクターホルダー接合用円弧面状凹部１２－３間の隙間が大きくなると、インジェクターホルダー接続部の位置精度及び仮付け強度を十分に確保することが困難となる。このため、従来は前記したように、インジェクターホルダー１２のホルダー接合用円弧面状凹部１２－３の底辺部の、レール本体の軸方向と平行な位置にレール本体との溶着強度を確保するための２個の仮付け用突起１７を設け、この２個の仮付け用突起１７を介してインジェクターホルダー１２を本管レール１１に当接させてプロジェクション溶接による仮付けを行っている。
しかし、インジェクターホルダー１２のホルダー接合用円弧面状凹部１２－３の底辺部にレール本体の軸方向と平行な位置に２個の仮付け用突起１７を設けて仮付けする方法では、インジェクターホルダー１２のレール密着性は良好でも、本管レール１１本体とインジェクターホルダー１２のセット時における当該インジェクターホルダーの接合用円弧面状凹部１２－３と本管レール１１のそれぞれの中心位置合せが的確に行われず、レール本体とインジェクターホルダーの円周方向の位置ずれを完全に解消することができず、インジェクターホルダー接続部の位置精度を十分に高めることができないという問題がある。又、レール本体とインジェクターホルダーの円周方向の位置ずれが生じた状態の場合、プロジェクション溶接機における仮付け時の電流が効率よく流れないため電力費も高くついたり、後工程で行うろう付けでの適正クリアランスから外れてろう付け不良を起こすという問題がある。 However, the conventional fuel rail for a gasoline direct injection engine described above has the following problems.
That is, the arc-shaped recess 12-3 for joining the holder of the
However, in the method of temporarily attaching the
本発明は、前記した従来のガソリン直噴エンジン用燃料レールの有する前記問題を解決するためになされたものであり、特にレール本体にインジェクターホルダーが直に取付けられた構造のガソリン直噴エンジン用燃料レールにおいて、本管レールとの当接面であるインジェクターホルダーの接合用円弧面状凹部（カット面）の形状の不均一に起因する本管レール本体とインジェクターホルダーの円周方向の位置ずれを防止し、インジェクターホルダー接続部の位置精度の優れたガソリン直噴エンジン用燃料レールを提供することを目的とするものである。
The present invention has been made to solve the above-mentioned problems of the conventional fuel rail for a gasoline direct injection engine, and in particular, a fuel for a gasoline direct injection engine having a structure in which an injector holder is directly attached to the rail body. Prevents misalignment of the main rail body and injector holder in the circumferential direction due to uneven shape of the arc surface recess (cut surface) for joining the injector holder, which is the contact surface with the main rail. However, it is an object of the present invention to provide a fuel rail for a gasoline direct injection engine having excellent position accuracy of an injector holder connection portion.
本発明に係るガソリン直噴エンジン用燃料レールは、本管レールに少なくとも一つのインジェクターホルダーを有するガソリン直噴エンジン用燃料レールであって、前記本管レールの周壁部に設けられた当該レールの流通路に通ずる貫孔部に前記インジェクターホルダーをろう付け接合して構成されるガソリン直噴エンジン用燃料レールにおいて、前記インジェクターホルダーに形成されたレール本体接合用円弧面状凹部に４個の当該インジェクターホルダー仮付け用突起が十字位置に設けられ、かつ前記４個の突起のうち、２個の突起は本管レール本体の軸方向と平行な位置の当該ホルダー接合用円弧面状凹部の底辺部に、残り２個の突起はレール本体の軸方向と直角方向位置の当該ホルダー接合用円弧面状凹部の縁部分にそれぞれ設けられ、前記十字位置に配置した４個の突起を介して当該インジェクターホルダーのレール本体接合用円弧面状凹部をレール本体に仮付けした後ろう付け接合して構成したことを特徴とするものである。
The fuel rail for a gasoline direct injection engine according to the present invention is a fuel rail for a gasoline direct injection engine having at least one injector holder on the main rail, and the distribution of the rail provided on the peripheral wall portion of the main rail. In a fuel rail for a gasoline direct injection engine formed by brazing and joining the injector holders to a through hole leading to a road, four injector holders are formed in the arc-shaped recesses for joining the rail body formed in the injector holders. Temporary attachment protrusions are provided at the cross position, and of the four protrusions, two protrusions are located at the bottom of the arc-shaped recess for joining the holder at a position parallel to the axial direction of the main rail body. The remaining two protrusions are provided at the edges of the arc-shaped recess for joining the holder at a position perpendicular to the axial direction of the rail body, and the rail of the injector holder is provided through the four protrusions arranged at the cross position. It is characterized in that an arcuate concave portion for joining the main body is temporarily attached to the rail main body and then brazed and joined.
又、本発明に係るガソリン直噴エンジン用燃料レールにおいて、前記レール本体接合用円弧面状凹部に設ける４個のインジェクターホルダー仮付け用突起は、それぞれポンチングによる当該レール素材の塑性変形で生じるくぼみにより該レール本体接合用円弧面状凹部の内側に張り出す突出部を突起として形成することを特徴とするものである。
Further, in the fuel rail for a gasoline direct injection engine according to the present invention, the four injector holder temporary attachment protrusions provided in the arc-shaped recesses for joining the rail body are each due to dents caused by plastic deformation of the rail material due to punching. It is characterized in that a protruding portion protruding inside the arc-shaped concave portion for joining the rail body is formed as a protrusion.
かかる構成のガソリン直噴エンジン用燃料レールにおいて、レール本体接合用円弧面状凹部の十字位置に設ける４個のインジェクターホルダー仮付け用突起のうち、２個の突起を本管レール本体の軸方向と平行な位置のインジェクターホルダー接合用円弧面状凹部の底辺部に、残り２個の突起をレール本体の軸方向と直角方向位置の当該ホルダー接合用円弧面状凹部の縁部分にそれぞれ設けたのは、インジェクターホルダー接合用円弧面状凹部の形状の不均一に起因する本管レール本体とインジェクターホルダーの位置ずれを防止し、かつレール本体とインジェクターホルダーの仮付け強度を高めるためである。又、レール本体接合用円弧面状凹部に設ける前記突起の形成方法としてポンチングによる当該レール素材の塑性変形を利用して形成する方法を採用したのは、突起の形成が簡単であるのみならず当該突起を所定の位置に的確にしかも均一な形状に簡単に形成することができるためである。
In the fuel rail for a gasoline direct injection engine having such a configuration, two of the four injector holder temporary attachment protrusions provided at the cross positions of the arc-shaped recesses for joining the rail body are the axial directions of the main rail body. The remaining two protrusions were provided at the bottom of the arc-shaped recess for joining the injector holder at parallel positions, and at the edge of the arc-shaped recess for joining the holder at the position perpendicular to the axial direction of the rail body. This is to prevent the displacement of the main rail body and the injector holder due to the non-uniform shape of the arcuate concave portion for joining the injector holder, and to increase the temporary attachment strength between the rail body and the injector holder. Further, as a method of forming the protrusion provided in the arcuate concave portion for joining the rail body, the method of forming the protrusion by utilizing the plastic deformation of the rail material by punching is adopted because the protrusion is not only easy to form but also said. This is because the protrusions can be easily formed at a predetermined position in an accurate and uniform shape.
本発明に係るガソリン直噴エンジン用燃料レールは、レール本体接合用円弧面状凹部に設けるインジェクターホルダー仮付け用突起を４個用い、この４個のインジェクターホルダー仮付け用突起をレール本体接合用円弧面状凹部の十字位置に設けるとともに、このレール本体接合用円弧面状凹部の十字位置に設ける４個の当該ホルダー仮付け用突起のうち、２個の突起を本管レール本体の軸方向と平行な位置のインジェクターホルダー接合用円弧面状凹部の底辺部に、残り２個の突起をレール本体の軸方向と直角方向位置の当該ホルダー接合用円弧面状凹部の縁部分にそれぞれ設けたことにより、ろう付けの際に行われる本管レール本体とインジェクターホルダーのセット時に、インジェクターホルダー接合用円弧面状凹部の形状の不均一に起因する本管レール本体とインジェクターホルダーの円周方向の位置ずれが防止され、当該ホルダーの位置精度の向上がはかられることによりレール本体とインジェクターホルダーの仮付け強度が高められる。又、インジェクターホルダーの位置精度の向上がはかられることにより、プロジェクション溶接機における溶接時の電流が効率よく流れるので省電力もはかられる。さらに、レール本体接合用円弧面状凹部に設けるインジェクターホルダー仮付け用突起の形成方法としてポンチングによる当該レール素材の塑性変形により形成する方法を採用したことにより、突起の形成が簡単であるのみならず当該突起を所定の位置に的確にしかも均一な形状に形成することができる。
The fuel rail for a gasoline direct injection engine according to the present invention uses four injector holder temporary attachment protrusions provided in the arc-shaped recess for joining the rail body, and these four injector holder temporary attachment protrusions are used as the arc for joining the rail body. Two of the four temporary holder protrusions provided at the cross position of the planar recess and at the cross position of the arc-shaped recess for joining the rail body are parallel to the axial direction of the main rail body. By providing the remaining two protrusions on the bottom of the arc-shaped recess for joining the injector holder at a suitable position on the edge of the arc-shaped recess for joining the holder at a position perpendicular to the axial direction of the rail body, respectively. Prevents misalignment of the main rail body and injector holder in the circumferential direction due to uneven shape of the arc-shaped recess for joining the injector holder when setting the main rail body and injector holder during brazing. As a result, the position accuracy of the holder is improved, so that the temporary attachment strength between the rail body and the injector holder is increased. Further, by improving the position accuracy of the injector holder, the current at the time of welding in the projection welding machine flows efficiently, so that power saving can be achieved. Furthermore, by adopting a method of forming the injector holder temporary attachment protrusions provided in the arc-shaped recesses for joining the rail body by plastic deformation of the rail material by punching, not only the protrusions can be easily formed. The protrusion can be formed at a predetermined position in an accurate and uniform shape.
本発明の改善の対象とするガソリン直噴エンジン用燃料レールは、前記した従来品と同様の構成を有するが、本発明に係るガソリン直噴エンジン用燃料レールは、本管レール１の軸方向にわたる周壁部に穿設した貫孔の部分にろう付け接合するインジェクターホルダーとして、図１（Ａ）（Ｂ）に示すインジェクターホルダー２を用いて本管レール１にろう付け接合して構成されている点に大きな特徴を有する。
即ち、本願発明に係るガソリン直噴エンジン用燃料レールにおけるインジェクターホルダー２は、仕上げ加工孔２－１と横孔２－２が切削加工により設けられ内部を流通路１－１となした円筒状の本管レール１の軸方向にわたる周壁部に穿設した貫孔１１－２（図４参照）と相対向する部分に切削加工によりカットして形成した当該ホルダー接合用円弧面状凹部２－３に、４個の当該ホルダー仮付け用突起３－１ａ、３－１ｂが図１（Ａ）に示すように十字位置に設けられている。この４個のホルダー仮付け用突起は、当該ホルダーの位置精度を考慮して、ホルダー仮付け用突起３－１ａは本管レール１のレール本体の軸方向と平行な位置の当該ホルダー接合用円弧面状凹部２－３の底辺部２－３ａに、残りのホルダー仮付け用突起３－１ｂは本管レール１のレール本体の軸方向と直角方向位置の当該ホルダー接合用円弧面状凹部２－３の縁２－３ｂ部分に、それぞれ設けられている。 The fuel rail for a gasoline direct injection engine, which is the object of the improvement of the present invention, has the same configuration as the above-mentioned conventional product, but the fuel rail for a gasoline direct injection engine according to the present invention extends in the axial direction of the main rail 1. As an injector holder to be brazed to the portion of the through hole formed in the peripheral wall, theinjector holder 2 shown in FIGS. 1A and 1B is used to braze to the main rail 1. Has a great feature.
That is, theinjector holder 2 in the fuel rail for a gasoline direct injection engine according to the present invention has a cylindrical shape in which finishing holes 2-1 and lateral holes 2-2 are provided by cutting to form a flow passage 1-1 inside. In the arc-shaped recess 2-3 for joining the holder, which was formed by cutting the portion facing the through hole 11-2 (see FIG. 4) formed in the peripheral wall portion of the main rail 1 in the axial direction by cutting. The four holder temporary attachment protrusions 3-1a and 3-1b are provided at cross positions as shown in FIG. 1 (A). In consideration of the position accuracy of the holder, the four holder temporary attachment protrusions 3-1a are the holder joining arcs at positions parallel to the axial direction of the rail body of the main rail 1. At the bottom 2-3a of the planar recess 2-3, the remaining holder temporary attachment protrusion 3-1b is located at a position perpendicular to the axial direction of the rail body of the main rail 1 and is an arcuate concave recess for joining the holder 2- It is provided on each of the edges 2-3b of 3.
即ち、本願発明に係るガソリン直噴エンジン用燃料レールにおけるインジェクターホルダー２は、仕上げ加工孔２－１と横孔２－２が切削加工により設けられ内部を流通路１－１となした円筒状の本管レール１の軸方向にわたる周壁部に穿設した貫孔１１－２（図４参照）と相対向する部分に切削加工によりカットして形成した当該ホルダー接合用円弧面状凹部２－３に、４個の当該ホルダー仮付け用突起３－１ａ、３－１ｂが図１（Ａ）に示すように十字位置に設けられている。この４個のホルダー仮付け用突起は、当該ホルダーの位置精度を考慮して、ホルダー仮付け用突起３－１ａは本管レール１のレール本体の軸方向と平行な位置の当該ホルダー接合用円弧面状凹部２－３の底辺部２－３ａに、残りのホルダー仮付け用突起３－１ｂは本管レール１のレール本体の軸方向と直角方向位置の当該ホルダー接合用円弧面状凹部２－３の縁２－３ｂ部分に、それぞれ設けられている。 The fuel rail for a gasoline direct injection engine, which is the object of the improvement of the present invention, has the same configuration as the above-mentioned conventional product, but the fuel rail for a gasoline direct injection engine according to the present invention extends in the axial direction of the main rail 1. As an injector holder to be brazed to the portion of the through hole formed in the peripheral wall, the
That is, the
前記インジェクターホルダーのレール本体接合用円弧面状凹部２－３の底辺部２－３ａと縁２－３ｂ部分に設ける４個のホルダー仮付け用突起３－１ａ、３－１ｂは、図２に拡大して示すようにポンチングにより適当な深さのくぼみ（凹部）３－１ｃを形成することにより当該レール素材が塑性変形してレール本体接合用円弧面状凹部２－３の内側に張り出してできる突出部をホルダー仮付け用突起３－１ａ、３－１ｂとして利用する。
The four holder temporary attachment protrusions 3-1a and 3-1b provided on the bottom 2-3a and the edge 2-3b of the arc-shaped recess 2-3 for joining the rail body of the injector holder are enlarged in FIG. As shown in the above, by forming a recess (recess) 3-1c of an appropriate depth by punching, the rail material is plastically deformed and protrudes inside the arc-shaped recess 2-3 for joining the rail body. The portion is used as the holder temporary attachment protrusions 3-1a and 3-1b.
本願発明において、ホルダー仮付け用突起３－１ａ、３－１ｂを４個用い、その４個の該ホルダー仮付け用突起を当該ホルダー接合用円弧面状凹部２－３に図１（Ａ）（Ｂ）に示すように十字位置に設けることとしたのは、以下に示す理由による。
即ち、ホルダー接合用円弧面状凹部２－３に設けるホルダー仮付け用突起の個数を４個に規定したのは、インジェクターホルダー２と本管レール１との密着性と配置バランスを考慮したためである。なお、このホルダー仮付け用突起の個数としては、本管レール１及びインジェクターホルダーの直径（太さ）や突起の大きさ等によっては４個以上設ける場合も考えられるが、本発明では通常使用されているガソリン直噴エンジン用燃料レールを基準にして４個に設定した。又、４個のインジェクターホルダー仮付け用突起３－１ａ、３－１ｂのうち、２個の当該突起３－１ａを本管レール本体の軸方向と平行な位置のインジェクターホルダー接合用円弧面状凹部２－３の底辺部２－３ａに設け、他の２個の当該突起３－１ｂをレール本体の軸方向と直角方向位置の当該ホルダー接合用円弧面状凹部２－３の縁２－３ｂ部分に設けたのは、本管レール１本体とインジェクターホルダー２のセット時における当該レール本体とインジェクターホルダーの円周方向の位置ずれを防止するためである。
具体的には、本管レール本体の軸方向と平行な位置に設けた２個のホルダー仮付け用突起３－１ａと、本管レール本体の軸方向と直角方向位置に設けた残り２個のホルダー仮付け用突起３－１ｂにより本管レール１本体に対するインジェクターホルダー２の接触状態が安定するので、インジェクターホルダー接合用円弧面状凹部の形状の不均一が吸収され、本管レール１本体に対するインジェクターホルダー２の円周方向の位置ずれを防止できることにより、プロジェクション溶接機による本管レール１本体とインジェクターホルダー２の仮付け強度をより高めることが可能となる。特に、本管レール本体の軸方向と平行な位置に設けた２個のホルダー仮付け用突起３－１ａにより、本管レール本体１とインジェクターホルダー２の仮付け強度をより高めることが可能となり、本管レール本体の軸方向と直角方向位置に設けた残り２個のホルダー仮付け用突起３－１ｂにより、本管レール１本体とインジェクターホルダー２の位置ずれを防止できることにより、プロジェクション溶接機における溶接時の電流が効率よく流れるので省電力もはかられるのみならず、後工程でのろう付け不良を起こすこともない。 In the present invention, four holder temporary attachment protrusions 3-1a and 3-1b are used, and the four holder temporary attachment protrusions are connected to the holder joining arc surface recesses 2-3 in FIGS. 1 (A) (A). The reason why it was decided to be provided at the cross position as shown in B) is as shown below.
That is, the number of holder temporary attachment protrusions provided in the holder joining arc surface recesses 2-3 is specified to be four in consideration of the adhesion between theinjector holder 2 and the main rail 1 and the arrangement balance. .. The number of temporary holder protrusions may be four or more depending on the diameter (thickness) of the main rail 1 and the injector holder, the size of the protrusions, etc., but it is usually used in the present invention. The number of rails was set to 4 based on the fuel rails for gasoline direct injection engines. Further, of the four injector holder temporary attachment protrusions 3-1a and 3-1b, two of the protrusions 3-1a are arcuate concave portions for joining the injector holder at positions parallel to the axial direction of the main rail body. The other two protrusions 3-1b are provided on the bottom portion 2-3a of 2-3, and the edge 2-3b portion of the arc-shaped recess 2-3 for joining the holder at a position perpendicular to the axial direction of the rail body. This is to prevent the rail body and the injector holder from being displaced in the circumferential direction when the main body of the main rail 1 and the injector holder 2 are set.
Specifically, two holder temporary mounting protrusions 3-1a provided at positions parallel to the axial direction of the main rail body, and the remaining two provided at positions perpendicular to the axial direction of the main rail body. Since the contact state of theinjector holder 2 with the main body of the main rail 1 is stabilized by the holder temporary attachment protrusion 3-1b, the uneven shape of the arcuate concave portion for joining the injector holder is absorbed, and the injector with respect to the main body of the main rail 1 is absorbed. By preventing the holder 2 from being displaced in the circumferential direction, it is possible to further increase the temporary attachment strength between the main rail 1 main body and the injector holder 2 by the projection welding machine. In particular, the two holder temporary attachment protrusions 3-1a provided at positions parallel to the axial direction of the main rail body make it possible to further increase the temporary attachment strength of the main rail body 1 and the injector holder 2. Welding in the projection welding machine by preventing the displacement of the main rail 1 main body and the injector holder 2 by the remaining two holder temporary attachment protrusions 3-1b provided at positions perpendicular to the axial direction of the main rail main body. Since the current of time flows efficiently, not only power saving can be achieved, but also welding failure in the subsequent process does not occur.
即ち、ホルダー接合用円弧面状凹部２－３に設けるホルダー仮付け用突起の個数を４個に規定したのは、インジェクターホルダー２と本管レール１との密着性と配置バランスを考慮したためである。なお、このホルダー仮付け用突起の個数としては、本管レール１及びインジェクターホルダーの直径（太さ）や突起の大きさ等によっては４個以上設ける場合も考えられるが、本発明では通常使用されているガソリン直噴エンジン用燃料レールを基準にして４個に設定した。又、４個のインジェクターホルダー仮付け用突起３－１ａ、３－１ｂのうち、２個の当該突起３－１ａを本管レール本体の軸方向と平行な位置のインジェクターホルダー接合用円弧面状凹部２－３の底辺部２－３ａに設け、他の２個の当該突起３－１ｂをレール本体の軸方向と直角方向位置の当該ホルダー接合用円弧面状凹部２－３の縁２－３ｂ部分に設けたのは、本管レール１本体とインジェクターホルダー２のセット時における当該レール本体とインジェクターホルダーの円周方向の位置ずれを防止するためである。
具体的には、本管レール本体の軸方向と平行な位置に設けた２個のホルダー仮付け用突起３－１ａと、本管レール本体の軸方向と直角方向位置に設けた残り２個のホルダー仮付け用突起３－１ｂにより本管レール１本体に対するインジェクターホルダー２の接触状態が安定するので、インジェクターホルダー接合用円弧面状凹部の形状の不均一が吸収され、本管レール１本体に対するインジェクターホルダー２の円周方向の位置ずれを防止できることにより、プロジェクション溶接機による本管レール１本体とインジェクターホルダー２の仮付け強度をより高めることが可能となる。特に、本管レール本体の軸方向と平行な位置に設けた２個のホルダー仮付け用突起３－１ａにより、本管レール本体１とインジェクターホルダー２の仮付け強度をより高めることが可能となり、本管レール本体の軸方向と直角方向位置に設けた残り２個のホルダー仮付け用突起３－１ｂにより、本管レール１本体とインジェクターホルダー２の位置ずれを防止できることにより、プロジェクション溶接機における溶接時の電流が効率よく流れるので省電力もはかられるのみならず、後工程でのろう付け不良を起こすこともない。 In the present invention, four holder temporary attachment protrusions 3-1a and 3-1b are used, and the four holder temporary attachment protrusions are connected to the holder joining arc surface recesses 2-3 in FIGS. 1 (A) (A). The reason why it was decided to be provided at the cross position as shown in B) is as shown below.
That is, the number of holder temporary attachment protrusions provided in the holder joining arc surface recesses 2-3 is specified to be four in consideration of the adhesion between the
Specifically, two holder temporary mounting protrusions 3-1a provided at positions parallel to the axial direction of the main rail body, and the remaining two provided at positions perpendicular to the axial direction of the main rail body. Since the contact state of the
１ 本管レール
１－１ 流通路
２ インジェクターホルダー
２－１ 仕上げ加工孔
２－２ 横孔
２－３ インジェクターホルダー接合用円弧面状凹部
２－３ａ ホルダー接合用円弧面状凹部の底辺部
２－３ｂ ホルダー接合用円弧面状凹部の縁
３－１ａ、３－１ｂ ホルダー仮付け用突起
３－１ｃ くぼみ 1 Main rail 1-1Flow passage 2 Injector holder 2-1 Finishing hole 2-2 Horizontal hole 2-3 Injector holder arc-shaped recess for joining 2-3a Bottom of arc-shaped recess for holder joining 2-3b Edges of arc-shaped recesses for joining holders 3-1a, 3-1b Protrusions for temporary attachment of holders 3-1c Indentations
１－１ 流通路
２ インジェクターホルダー
２－１ 仕上げ加工孔
２－２ 横孔
２－３ インジェクターホルダー接合用円弧面状凹部
２－３ａ ホルダー接合用円弧面状凹部の底辺部
２－３ｂ ホルダー接合用円弧面状凹部の縁
３－１ａ、３－１ｂ ホルダー仮付け用突起
３－１ｃ くぼみ 1 Main rail 1-1
Claims (2)
- 本管レールに少なくとも一つのインジェクターホルダーを有するガソリン直噴エンジン用燃料レールであって、前記本管レールの周壁部に設けられた当該レールの流通路に通ずる貫孔部に前記インジェクターホルダーをろう付け接合して構成されるガソリン直噴エンジン用燃料レールにおいて、前記インジェクターホルダーに形成されたレール本体接合用円弧面状凹部に４個の当該インジェクターホルダー仮付け用突起が十字位置に設けられ、かつ前記４個の突起のうち、２個の突起は本管レール本体の軸方向と平行な位置の当該ホルダー接合用円弧面状凹部の底辺部に、残り２個の突起はレール本体の軸方向と直角方向位置の当該ホルダー接合用円弧面状凹部の縁部分にそれぞれ設けられ、前記十字位置に配置した４個のインジェクターホルダー仮付け用突起を介して当該インジェクターホルダーのレール本体接合用円弧面状凹部をレール本体に仮付けした後ろう付け接合して構成したことを特徴とするガソリン直噴エンジン用燃料レール。 A fuel rail for a gasoline direct injection engine having at least one injector holder on the main rail, and the injector holder is brazed to a through hole portion provided on the peripheral wall portion of the main rail and communicating with the flow passage of the rail. In a fuel rail for a gasoline direct injection engine formed by joining, four injector holder temporary attachment protrusions are provided at a cross position in an arcuate concave portion for joining the rail body formed on the injector holder, and the above. Of the four protrusions, two are at the bottom of the arc-shaped recess for joining the holder at a position parallel to the axial direction of the main rail body, and the remaining two protrusions are perpendicular to the axial direction of the rail body. The arc-shaped recesses for joining the rail body of the injector holder are provided at the edges of the arc-shaped recesses for joining the holders in the directional position via the four injector holder temporary attachment protrusions arranged at the cross positions. A fuel rail for gasoline direct injection engines, which is characterized by being temporarily attached to the rail body and then brazed together.
- 前記レール本体接合用円弧面状凹部に設ける４個のインジェクターホルダー仮付け用突起は、それぞれポンチングによる当該レール素材の塑性変形で生じるくぼみにより該レール本体接合用円弧面状凹部の内側に張り出す突出部を突起として形成することを特徴とする請求項１に記載のガソリン直噴エンジン用燃料レール。 The four injector holder temporary attachment protrusions provided in the arc-shaped recess for joining the rail body project to the inside of the arc-shaped recess for joining the rail body due to the dents generated by the plastic deformation of the rail material due to punching. The fuel rail for a gasoline direct injection engine according to claim 1, wherein the portion is formed as a protrusion.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2020-012952 | 2020-01-29 | ||
| JP2020012952A JP2021116798A (en) | 2020-01-29 | 2020-01-29 | Fuel rail for gasoline direct-injection engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2021153105A1 true WO2021153105A1 (en) | 2021-08-05 |
Family
ID=77078970
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2020/047947 WO2021153105A1 (en) | 2020-01-29 | 2020-12-22 | Fuel rail for gasoline direct-injection engine |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP2021116798A (en) |
| WO (1) | WO2021153105A1 (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010007651A (en) * | 2008-06-30 | 2010-01-14 | Usui Kokusai Sangyo Kaisha Ltd | Fuel rail for high-pressure direct injection internal combustion engine, and manufacturing method thereof |
| KR20110003235A (en) * | 2009-07-03 | 2011-01-11 | (주)동보 | Method for welding mounting lug and injector holder to fuel rail |
| JP2011226425A (en) * | 2010-04-22 | 2011-11-10 | Mazda Motor Corp | High pressure fuel pipe structure and manufacturing method for the same |
| JP2014196730A (en) * | 2013-03-29 | 2014-10-16 | トヨタ自動車株式会社 | Fuel supply pipe |
| CN106424999A (en) * | 2016-10-31 | 2017-02-22 | 联合汽车电子有限公司 | Copper brazing manufacturing method of fuel distribution pipe and radial connecting part of main pipe |
-
2020
- 2020-01-29 JP JP2020012952A patent/JP2021116798A/en active Pending
- 2020-12-22 WO PCT/JP2020/047947 patent/WO2021153105A1/en active Application Filing
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010007651A (en) * | 2008-06-30 | 2010-01-14 | Usui Kokusai Sangyo Kaisha Ltd | Fuel rail for high-pressure direct injection internal combustion engine, and manufacturing method thereof |
| KR20110003235A (en) * | 2009-07-03 | 2011-01-11 | (주)동보 | Method for welding mounting lug and injector holder to fuel rail |
| JP2011226425A (en) * | 2010-04-22 | 2011-11-10 | Mazda Motor Corp | High pressure fuel pipe structure and manufacturing method for the same |
| JP2014196730A (en) * | 2013-03-29 | 2014-10-16 | トヨタ自動車株式会社 | Fuel supply pipe |
| CN106424999A (en) * | 2016-10-31 | 2017-02-22 | 联合汽车电子有限公司 | Copper brazing manufacturing method of fuel distribution pipe and radial connecting part of main pipe |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2021116798A (en) | 2021-08-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4519368A (en) | Fuel injection rail assembly | |
| JP5322074B2 (en) | Welded joint between a thick component and a thin component and a fuel high-pressure pump used in an internal combustion engine | |
| KR101928140B1 (en) | Fuel rail assembly for an internal combustion engine | |
| JP2017223233A (en) | Manufacturing method of high pressure pump for fuel system of internal combustion engine | |
| JP5447138B2 (en) | High-pressure fuel piping structure | |
| JPH0754616Y2 (en) | Fuel delivery pipe | |
| US10436163B2 (en) | Fuel rail assembly for an internal combustion engine | |
| KR950007144Y1 (en) | Fuel delivery rail pipes | |
| JP2006233866A (en) | Common rail | |
| WO2021153105A1 (en) | Fuel rail for gasoline direct-injection engine | |
| US8388269B2 (en) | Pin mirror cutter | |
| JPH0752373Y2 (en) | Fuel delivery pipe | |
| KR102288014B1 (en) | High-pressure fuel pumps for fuel injection systems in internal combustion engines | |
| US11352993B2 (en) | Fuel distributor | |
| US10138856B2 (en) | Alignment element for an injector | |
| JP2827129B2 (en) | Fuel delivery pipe and its processing method | |
| JP4184238B2 (en) | Fuel delivery pipe | |
| US20220226942A1 (en) | Bracket presenter for ultrasonic welder | |
| EP2071176A1 (en) | Method for Assembly of a Direct Injection Fuel Rail | |
| KR101861002B1 (en) | Fuel rail assembly for vehicle | |
| JPH082464Y2 (en) | Fuel delivery pipe | |
| JP2014092077A (en) | Delivery pipe | |
| US20050109324A1 (en) | Fuel injection rail | |
| JP3845929B2 (en) | Fuel injection device for internal combustion engine | |
| JP2514078Y2 (en) | Fuel delivery pipe |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 20916293 Country of ref document: EP Kind code of ref document: A1 |
|
| NENP | Non-entry into the national phase |
Ref country code: DE |
|
| 122 | Ep: pct application non-entry in european phase |
Ref document number: 20916293 Country of ref document: EP Kind code of ref document: A1 |