WO2021153105A1 - Rampe d'injecteur pour moteur à injection directe d'essence - Google Patents

Rampe d'injecteur pour moteur à injection directe d'essence Download PDF

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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
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WO
WIPO (PCT)
Prior art keywords
rail
holder
joining
injector holder
arc
Prior art date
Application number
PCT/JP2020/047947
Other languages
English (en)
Japanese (ja)
Inventor
和真 日野林
和弘 芹澤
Original Assignee
臼井国際産業株式会社
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 臼井国際産業株式会社 filed Critical 臼井国際産業株式会社
Publication of WO2021153105A1 publication Critical patent/WO2021153105A1/fr

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    • 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

L'invention concerne un rail de carburant destiné à un moteur à injection directe d'essence, qui empêche un désalignement de support d'injecteur dû à une forme irrégulière de la surface de joint de corps de rail principal du support d'injecteur et qui présente une excellente précision de position d'une pièce de liaison au support d'injection.　Ce rail de carburant destiné à un moteur à injection directe d'essence, agencé par brasage du support d'injection à un rail principal, se caractérise en ce que quatre saillies, destinées à la fixation temporaire du support, sont placées en positions transversales, dans des évidements arqués d'assemblage de corps de rail formés dans le support d'injecteur, et en ce que les évidements arqués d'assemblage de corps de rail du support d'injecteur sont brasés après avoir été temporairement fixés au corps de rail par l'intermédiaire des quatre saillies disposées en positions transversales.
PCT/JP2020/047947 2020-01-29 2020-12-22 Rampe d'injecteur pour moteur à injection directe d'essence WO2021153105A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2020-012952 2020-01-29
JP2020012952A JP2021116798A (ja) 2020-01-29 2020-01-29 ガソリン直噴エンジン用燃料レール

Publications (1)

Publication Number Publication Date
WO2021153105A1 true WO2021153105A1 (fr) 2021-08-05

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PCT/JP2020/047947 WO2021153105A1 (fr) 2020-01-29 2020-12-22 Rampe d'injecteur pour moteur à injection directe d'essence

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JP (1) JP2021116798A (fr)
WO (1) WO2021153105A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010007651A (ja) * 2008-06-30 2010-01-14 Usui Kokusai Sangyo Kaisha Ltd 高圧直噴内燃機関用燃料レール及びその製造方法
KR20110003235A (ko) * 2009-07-03 2011-01-11 (주)동보 마운팅 러그 및 인젝터 홀더를 연료분배관에 용접하는 방법
JP2011226425A (ja) * 2010-04-22 2011-11-10 Mazda Motor Corp 高圧燃料配管構造およびその製造方法
JP2014196730A (ja) * 2013-03-29 2014-10-16 トヨタ自動車株式会社 燃料供給配管
CN106424999A (zh) * 2016-10-31 2017-02-22 联合汽车电子有限公司 燃油分配管铜钎焊制造方法及主管径向连接部件

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010007651A (ja) * 2008-06-30 2010-01-14 Usui Kokusai Sangyo Kaisha Ltd 高圧直噴内燃機関用燃料レール及びその製造方法
KR20110003235A (ko) * 2009-07-03 2011-01-11 (주)동보 마운팅 러그 및 인젝터 홀더를 연료분배관에 용접하는 방법
JP2011226425A (ja) * 2010-04-22 2011-11-10 Mazda Motor Corp 高圧燃料配管構造およびその製造方法
JP2014196730A (ja) * 2013-03-29 2014-10-16 トヨタ自動車株式会社 燃料供給配管
CN106424999A (zh) * 2016-10-31 2017-02-22 联合汽车电子有限公司 燃油分配管铜钎焊制造方法及主管径向连接部件

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