EP4102049A1 - Benzindirekteinspritzungsverteilerrohr - Google Patents

Benzindirekteinspritzungsverteilerrohr Download PDF

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Publication number
EP4102049A1
EP4102049A1 EP21770565.6A EP21770565A EP4102049A1 EP 4102049 A1 EP4102049 A1 EP 4102049A1 EP 21770565 A EP21770565 A EP 21770565A EP 4102049 A1 EP4102049 A1 EP 4102049A1
Authority
EP
European Patent Office
Prior art keywords
fuel rail
rail body
injector
injector cup
cup adapter
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
Application number
EP21770565.6A
Other languages
English (en)
French (fr)
Other versions
EP4102049A4 (de
Inventor
Hiroyuki Nishizawa
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Usui Co Ltd
Original Assignee
Usui Co Ltd
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 Usui Co Ltd filed Critical Usui Co Ltd
Publication of EP4102049A1 publication Critical patent/EP4102049A1/de
Publication of EP4102049A4 publication Critical patent/EP4102049A4/de
Pending legal-status Critical Current

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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
    • 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
    • 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
    • F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/14—Arrangements of injectors with respect to engines; Mounting of injectors
    • 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
    • F02M69/00—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel
    • F02M69/46—Details, component parts or accessories not provided for in, or of interest apart from, the apparatus covered by groups F02M69/02 - F02M69/44
    • F02M69/462—Arrangement of fuel conduits, e.g. with valves for maintaining pressure in the pipes after the engine being shut-down
    • F02M69/465—Arrangement of fuel conduits, e.g. with valves for maintaining pressure in the pipes after the engine being shut-down of fuel 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
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/85—Mounting of fuel injection apparatus
    • F02M2200/857—Mounting of fuel injection apparatus characterised by mounting fuel or common rail to engine

Definitions

  • the present invention relates to a gasoline direct-injection rail having a fuel rail body and an injector cup adapter.
  • Patent Document 1 it has already known that an injector is connected to a fuel rail body for a high pressure internal combustion engine via a connection member such as a cap nut.
  • a connection member such as a cap nut.
  • a special injector (33) formed in a long shape corresponding to the distance from a (not illustrated) fuel rail body to a combustion chamber (32) as shown in Fig. 3 is connected with the above described conventional fuel rail body.
  • a long injector cup is integrally formed with the fuel rail body as the method of using the conventional injector cup.
  • a pipe connecting an injector cup and a rail body is integrally formed instead of the long injector cup and a conventionally and generally used injector is connected and fixed to the injector cup.
  • the injector (33) formed in a long shape corresponding to the distance from the (not illustrated) fuel rail body provided on an upper portion of an engine (31) to the combustion chamber (32) provided on a lower part of the engine (31) is connected, the injector (33) formed in a long shape should be specially manufactured. Thus, the manufacturing cost increases.
  • the long injector cup is integrally formed with the fuel rail body, the size of the entire fuel rail becomes large. Accordingly, the flexibility of the layout is decreased and the size of the entire product becomes large. Thus, handling is complicated.
  • a fuel pressure of a gasoline direct injection engine is expected to become higher.
  • a fuel rail formed by fixing and arranging various members on a raw pipe by in-furnace brazing and the like may cause an insufficient strength. Therefore, it is required that the fuel rail is formed by hot forging.
  • the present invention is made for solving the above described problem and obtaining the fuel rail capable of forming the fuel rail body by hot forging and having high flexibility of the layout with a simple structure while reducing the cost even when the distance from the fuel rail body to the combustion chamber is long.
  • the present invention solves the above described problem and comprised of a fuel rail body and an injector cup adapter independently formed from the fuel rail body, wherein the fuel rail body is formed by hot forging, the injector cup adapter is formed by cutting, and the injector cup adapter and the fuel rail body are connected and fixed to each other in a state that a connection portion is sealed by an O-ring.
  • injector cup adapter and the fuel rail body can be connected and fixed to a cylinder block of the engine by screwing in a state that the connection portion is sealed by the O-ring.
  • the fuel rail body and the injector cup adapter are independently formed from each other, only the fuel rail body can be manufactured by hot forging. Thus, it is possible to bear a higher fuel pressure of the engine. Even when the distance between the fuel rail body and the combustion chamber is long, the length of the injector cup adapter can be formed in a long shape in accordance with the distance. Thus, it is possible to arrange the injector in accordance with the distance between the fuel rail body and the combustion chamber. Accordingly, the fuel rail can be easily manufactured without requiring high cost.
  • the fuel rail body can be arranged on an upper portion of an engine.
  • the distance between the fuel rail body and the combustion chamber becomes longer.
  • the injector cup adapter having the length corresponding to the distance is connected to the fuel rail body in the present invention.
  • the injector can be arranged on an appropriate position so that the injector faces the combustion chamber.
  • it is not necessary to specially manufacture the long injector thus, the manufacturing cost of the entire fuel injection system can be suppressed.
  • the fuel rail body can be fixed and arranged on an upper portion of a cylinder block of the engine, and the injector cup adapter can be arranged in an insertion clearance formed on the cylinder block.
  • the fuel rail body and the injector cup adapter are independently formed from each other as described above.
  • the fuel rail body can be manufactured by hot forging. Accordingly, the fuel rail capable of bearing higher fuel pressure of the engine can be obtained.
  • the length of the injector cup adapter can be adjusted in accordance with the distance.
  • the injector can be arranged on an appropriate position. Since the specially prepared long injector is not required, the manufacturing cost of the entire fuel injection system can be suppressed and the fuel rail body can be easily manufactured.
  • the present invention can contribute to improvement of assembling property and relaxation of dimensional accuracy.
  • (1) is a fuel rail body formed by hot forging.
  • the fuel rail body (1) is formed in a long pipe shape to have a fuel passage (2) inside.
  • the strength of the fuel rail body (1) can be enhanced.
  • the product capable of bearing higher pressure of an engine (11) in the future can be obtained.
  • An adapter insertion portion (3) is integrally formed with the fuel rail body (1) to protrude from the fuel rail body (1) in a direction orthogonal to the fuel passage (2).
  • a connection recess (4) is provided on the adapter insertion portion (3) so that an injector cup adapter (6) can be connected to the connection recess (4).
  • the connection recess (4) and the fuel passage (2) are communicated with each other via a communication passage (5).
  • the injector cup adapter (6) formed by cutting is connected to the connection recess (4).
  • a connection protrusion (7) connected to the fuel rail body (1) is provided on one end of the injector cup adapter (6), and a connection recess (8) for connecting one end of an injector (12) is provided on the other end of the injector cup adapter (6).
  • the connection protrusion (7) of the injector cup adapter (6) is connected to an inside of the connection recess (4) of the adapter insertion portion (3) via an O-ring (15).
  • the injector cup adapter (6) and a connection portion (16) of the fuel rail body (1) are connected and fixed to each other in a state of being sealed by the O-ring (15). Accordingly, leakage of the liquid and the like can be prevented at the connection portion (16) between the injector cup adapter (6) and the fuel rail body (1).
  • a flow space is formed between the connection protrusion (7) and the connection recess (4) so that the fuel from the fuel passage (2) of the fuel rail body (1) flows through the flow space.
  • a screw fixing portion (10) having a (not illustrated) screw hole is connected and arranged on the adapter insertion portion (3) at an opposite side of the fuel rail body (1).
  • a screw fixing portion (10) having a (not illustrated) screw hole is connected and arranged on the adapter insertion portion (3) at an opposite side of the fuel rail body (1).
  • an insertion clearance (14) is formed between a pair of cylinder blocks (13) forming the engine (11) so that the injector cup adapter (6) and the injector (12) can be inserted and arranged in the insertion clearance (14).
  • the fuel rail body (1) is arranged on an upper part of the cylinder blocks (13), the injector cup adapter (6) assembled to the fuel rail body (1) is inserted into the insertion clearance (14) and a base end of the injector (12) is inserted and arranged in the connection recess (8).
  • a (not illustrated) screw is inserted into the screw fixing portion (10) formed integrally with the fuel rail body (1) to fix the fuel rail body (1) to the cylinder blocks (13) by the screw.
  • the injector cup adapter (6) is formed in a long shape corresponding to the long distance between the fuel rail body (1) and the combustion chamber.
  • the conventionally and widely used injector (12) having a general length is connected to the injector cup adapter (6) having a long shape.
  • the injector (12) can be arranged on an appropriate position facing the combustion chamber. Therefore, it is not necessary to use a specially prepared long injector (12). Thus, the manufacturing cost of the entire fuel injection system can be suppressed.
  • the injector cup adapter (6) is formed in a long shape as described above. Therefore, the injector (12) can be arranged on an appropriate position corresponding to the long distance between the fuel rail body (1) and the combustion chamber. Thus, manufacturing can be facilitated.
  • the injector cup adapter (6) is formed independently from the fuel rail body (1) and the injector cup adapter (6) is formed by cutting.
  • the dimension can be easily adjusted in accordance with the distance from the fuel rail body (1) to the injector (12).
  • the length of the injector cup adapter (6) can be arbitrarily adjusted in accordance with the position of the other components assembled to the engine (11).
  • flexibility of the layout can be increased.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)
EP21770565.6A 2020-03-18 2021-02-22 Benzindirekteinspritzungsverteilerrohr Pending EP4102049A4 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2020047812A JP2021148047A (ja) 2020-03-18 2020-03-18 ガソリン直噴レール
PCT/JP2021/006555 WO2021187015A1 (ja) 2020-03-18 2021-02-22 ガソリン直噴レール

Publications (2)

Publication Number Publication Date
EP4102049A1 true EP4102049A1 (de) 2022-12-14
EP4102049A4 EP4102049A4 (de) 2024-02-28

Family

ID=77771975

Family Applications (1)

Application Number Title Priority Date Filing Date
EP21770565.6A Pending EP4102049A4 (de) 2020-03-18 2021-02-22 Benzindirekteinspritzungsverteilerrohr

Country Status (4)

Country Link
EP (1) EP4102049A4 (de)
JP (1) JP2021148047A (de)
CN (1) CN115280011A (de)
WO (1) WO2021187015A1 (de)

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09317606A (ja) * 1996-05-27 1997-12-09 Nissan Motor Co Ltd 直噴式内燃機関の燃料供給装置
DE19853090A1 (de) * 1998-11-18 2000-05-25 Bosch Gmbh Robert Brennstoffeinspritzanlage
JP3901377B2 (ja) * 1999-02-26 2007-04-04 株式会社ケーヒン エンジン用燃料噴射弁の取付け構造
JP2001221127A (ja) * 2000-02-09 2001-08-17 Nissan Motor Co Ltd 内燃機関の燃料噴射装置
DE60003784T2 (de) * 2000-04-26 2004-06-03 Ford Global Technologies, Inc., A subsidiary of Ford Motor Co., Dearborn Kraftstoffeinspritzsystem für Brennkraftmaschinen
JP2002070691A (ja) * 2000-08-31 2002-03-08 Otics Corp デリバリパイプ
JP2003028031A (ja) * 2001-07-16 2003-01-29 Daihatsu Motor Co Ltd 多気筒内燃機関における燃料噴射弁の取付け装置
FR2852636B1 (fr) * 2003-03-19 2005-06-17 Peugeot Citroen Automobiles Sa Dispositif d'injection de carburant pour moteur a combustion interne, notamment d'un vehicule automobile.
JP2005069090A (ja) * 2003-08-25 2005-03-17 Mitsubishi Electric Corp 燃料噴射弁
JP4099668B2 (ja) * 2004-03-29 2008-06-11 株式会社デンソー 燃料噴射弁の取り付け構造およびそれに用いる固定部材
JP5510992B2 (ja) 2008-06-30 2014-06-04 臼井国際産業株式会社 高圧直噴内燃機関用燃料レール及びその製造方法
JP2010209738A (ja) * 2009-03-09 2010-09-24 Toyota Motor Corp 内燃機関の燃料噴射装置
JP5810726B2 (ja) * 2011-08-09 2015-11-11 マツダ株式会社 直噴式エンジン用フューエルレールアッシーの組付方法
EP2700805B1 (de) * 2012-08-23 2016-06-29 Continental Automotive GmbH Verlängerungsteil, Einspritzventil und Brennstoffversorgungsanordnung

Also Published As

Publication number Publication date
JP2021148047A (ja) 2021-09-27
WO2021187015A1 (ja) 2021-09-23
EP4102049A4 (de) 2024-02-28
CN115280011A (zh) 2022-11-01

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