EP3249212A1 - Rail commun - Google Patents

Rail commun Download PDF

Info

Publication number
EP3249212A1
EP3249212A1 EP17172586.4A EP17172586A EP3249212A1 EP 3249212 A1 EP3249212 A1 EP 3249212A1 EP 17172586 A EP17172586 A EP 17172586A EP 3249212 A1 EP3249212 A1 EP 3249212A1
Authority
EP
European Patent Office
Prior art keywords
seamless tube
sealing face
reservoir
hole
high pressure
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.)
Withdrawn
Application number
EP17172586.4A
Other languages
German (de)
English (en)
Inventor
Ernur Güsav Pihava
Can Ertan
Ahmet Can Gunduz
Nihat Sert
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.)
Delphi International Operations Luxembourg SARL
Original Assignee
Delphi International Operations Luxembourg SARL
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 Delphi International Operations Luxembourg SARL filed Critical Delphi International Operations Luxembourg SARL
Publication of EP3249212A1 publication Critical patent/EP3249212A1/fr
Withdrawn legal-status Critical Current

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
    • 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
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/31—Fuel-injection apparatus having hydraulic pressure fluctuations damping elements
    • F02M2200/315—Fuel-injection apparatus having hydraulic pressure fluctuations damping elements for damping fuel pressure fluctuations
    • 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
    • F02M2200/80—Fuel injection apparatus manufacture, repair or assembly
    • F02M2200/8061—Fuel injection apparatus manufacture, repair or assembly involving press-fit, i.e. interference or friction fit

Definitions

  • the present invention relates to a high pressure reservoir adapted to be arranged in a fuel injection equipment.
  • a diesel fuel injection equipment comprises a high pressure reservoir, commonly known as a common rail, wherein is delivered pressurized fuel and wherefrom depart pipes joining fuel injectors that spray, upon command, said pressurized fuel into compression chambers of an internal combustion engine.
  • a pressure sensor At both extremities of the rail are typically arranged a pressure sensor and a pressure limiting valve.
  • said common rail is a highly stressed component typically manufactured by machining a forged blank.
  • the manufacturing process comprises, in addition to the classical machining operations, autofrettage of the two extremities performed and creating residual compressive stresses acting against the radial stress and enabling longer fatigue cycling.
  • a high pressure reservoir adapted to be arranged in a diesel fuel injection system, the reservoir extending along a main axis from a first end adapted to complementary receive a first device, such as a pressure sensor to, a second end adapted to complementary receive a second device, such as a pressure valve limiter.
  • Said reservoir has a peripheral wall defining an inner space and, being further provided with a plurality of radial protrusions defining radial holes opening in said inner space and adapted to complementary receive inlet and outlet pipes.
  • the reservoir comprises an outer forged tubular body in which is inserted a seamless tube, the inner space being defined inside the seamless tube.
  • the seamless tube is press-fitted with interference.
  • any radial channel into the inner space is surrounded by a female sealing face provided in the wall of the seamless tube, said female sealing face being adapted to receive in abutment a complementary male sealing face of an inlet or an outlet pipe.
  • said female sealing face may be conical.
  • the nvention also extends to a method to manufacture a high pressure reservoir as described above.
  • the method comprising the steps of:
  • sealing face machined machined conical.
  • the method further comprising the step:
  • a high pressure reservoir 10 also known as a common rail 10, adapted to be arranged in a fuel injection equipment of an internal combustion engine.
  • the rail 10 has an elongated body 12 defining, an inner space S surrounded by a peripheral wall 14 and, the rail 10 extends along a main axis X from a first end 16, on the left of the figure, where is arranged a first device 18 which here is a pressure sensor to, a second end 20, right of the figure where is arranged a second device 22 here a pressure limiter.
  • the body 12 is provided with radial protrusions 24 each being centrally pierced and externally threaded so that a nut 26 can sealingly fix a high pressure pipe 28 for either delivering pressurized fuel into the inner space S or, for delivering said pressurized fuel from said inner space S toward fuel injectors.
  • the rail 12 is adapted to a four cylinder engine and it is provided with one inlet and four outlets. Other engine types would require another rail with a different number of outlets.
  • the rail 12 is provided with a hose connector member 30 adapted to receive a flexible hose of a return line joining a low pressure tank enabling, in use, excess fuel in the rail to flow through said line when the pressure limiter 22 opens.
  • the body is provided with pierced fixing ears 32, two on the example of figure 1 , the rail 12 being fixed via screws engaged through the hole of the fixing ears and tightened onto the engine block.
  • the body 12 comprises an outer member 34 and an inner member 36.
  • the outer member 34 is a forged body, made of steel having low mechanical properties relatively to the inner member 36 that is a seamless tube which role is to reinforce the rail structure.
  • the forged body 34 is provided with an axial X through hole 38 in which is press-fitted with interference the inner member reinforcement seamless tube 36.
  • the protrusion 24 is provided with a radial hole 40 extending from the outer face of the protrusion and opening 42 in the inner space S.
  • the hole 40 is of constant diameter D40 enabling engagement of the high pressure pipe and, in the vicinity of the opening into the inner space S the section of said hole 40 restricts and is tapered so that a conical sealing face 44 is formed surrounding said opening 42.
  • said conical female sealing face 44 is mainly provided in the thickness of the seamless tube 36. It could be entirely in the thickness of the seamless tube 36.
  • an enlarged head portion defining on one side a shoulder joining the main part of the pipe and, on the other side at the very extremity of the pipe, a tapered male sealing face 46.
  • a restriction 48 to the inner conduit of the pipe is provided inside said extremity of the pipe.
  • the forged body 34 has a yield strength of 650 MPa and an ultimate strength of 950 MPa while the seamless tube 36 had a yield strength of 1100 MPa and an ultimate strength of 1400 MPa.
  • Figure 4 sketches a section of the first end 16 of the rail.
  • the seamless tube 36 ends before the forged body 34 and, the very portion of the forged body 36 is internally threaded.
  • the pressure sensor 18 which is outwardly threaded is complementary screwed in the forged body 36 and, because of the different behavior of the materials and, of the sealing performance required, a metallic washer 50 is inserted between the end face of the seamless tube and the pressure sensor 18.
  • the rail 10 is mechanically reinforced and the manufacturing is eased. Indeed, compared to an entirely forged body, the classical operations of autofrettage, the micro-hole machining of the inlet and outlets openings 42 into the inner space S and, the gun drill operation are removed.
  • the method of manufacturing 100 the rail comprises the steps of:

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)
EP17172586.4A 2016-05-25 2017-05-23 Rail commun Withdrawn EP3249212A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1609237.1A GB2550611A (en) 2016-05-25 2016-05-25 Common rail

Publications (1)

Publication Number Publication Date
EP3249212A1 true EP3249212A1 (fr) 2017-11-29

Family

ID=56369973

Family Applications (1)

Application Number Title Priority Date Filing Date
EP17172586.4A Withdrawn EP3249212A1 (fr) 2016-05-25 2017-05-23 Rail commun

Country Status (2)

Country Link
EP (1) EP3249212A1 (fr)
GB (1) GB2550611A (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019137796A1 (fr) * 2018-01-10 2019-07-18 Delphi Technologies Ip Limited Rampe commune de carburant
CN110625328A (zh) * 2018-06-25 2019-12-31 德尔福知识产权有限公司 制造共轨的方法
CN113931763A (zh) * 2021-09-30 2022-01-14 东风商用车有限公司 一种高压共轨管

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000073908A (ja) * 1998-09-01 2000-03-07 Denso Corp 高圧燃料供給装置
DE10303853A1 (de) * 2003-01-30 2004-08-12 Schmittersysco Gmbh Zusammengesetzte Kraftstoff-Hochdruck-Metalleitung mit einem inneren und einem äußeren Rohrteil sowie Herstellungsverfahren dafür
JP2010159725A (ja) * 2009-01-09 2010-07-22 Denso Corp 蓄圧器およびその製造方法

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012222448A1 (de) * 2012-12-06 2014-06-26 Robert Bosch Gmbh Hochdruckspeicher für ein Kraftstoffeinspritzsystem und Verfahren zur Montage eines Hochdruckspeichers
JP6070617B2 (ja) * 2014-04-03 2017-02-01 Ｊｆｅスチール株式会社 耐内圧疲労特性に優れた燃料噴射管用継目無鋼管
CN204783401U (zh) * 2015-06-30 2015-11-18 上海尊马汽车管件股份有限公司 直喷式汽油发动机用耐高压无缝管

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000073908A (ja) * 1998-09-01 2000-03-07 Denso Corp 高圧燃料供給装置
DE10303853A1 (de) * 2003-01-30 2004-08-12 Schmittersysco Gmbh Zusammengesetzte Kraftstoff-Hochdruck-Metalleitung mit einem inneren und einem äußeren Rohrteil sowie Herstellungsverfahren dafür
JP2010159725A (ja) * 2009-01-09 2010-07-22 Denso Corp 蓄圧器およびその製造方法

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019137796A1 (fr) * 2018-01-10 2019-07-18 Delphi Technologies Ip Limited Rampe commune de carburant
CN110625328A (zh) * 2018-06-25 2019-12-31 德尔福知识产权有限公司 制造共轨的方法
CN113931763A (zh) * 2021-09-30 2022-01-14 东风商用车有限公司 一种高压共轨管

Also Published As

Publication number Publication date
GB201609237D0 (en) 2016-07-06
GB2550611A (en) 2017-11-29

Similar Documents

Publication Publication Date Title
EP3006791B1 (fr) Dispositif à vanne
EP3249212A1 (fr) Rail commun
EP2833037A2 (fr) Unité de soupape
KR20190034679A (ko) 체크 밸브, 고압 부품 및 고압 연료 펌프
WO2016124660A1 (fr) Procédé de fabrication d'une rampe commune
KR101489133B1 (ko) 입구 커넥터
WO1984000398A1 (fr) Connecteur de raccordement de conduite de fluide traversant une cloison etanche
CN109555628B (zh) 燃料分配器
US7350507B2 (en) Fuel injector assembly and method of mounting the same
US8783731B2 (en) Connecting arrangement
US20040080156A1 (en) Common rail for diesel engines
EP1741923A1 (fr) Système de connexion pour une rampe tubulaire pour fluides à haute pression et système pour réduire a taille d'une rampe
DE102008000144A1 (de) Common Rail
US8919822B2 (en) Fitting system for a hydraulic tuning cable
KR20170031785A (ko) 가솔린 직접 분사 엔진용 연료 레일의 단말 시일 구조
KR101960201B1 (ko) 가솔린 직분사 엔진용 연료 레일의 단말 시일 구조
KR20170024091A (ko) 가솔린 직분사 엔진용 연료 레일의 단말 시일 구조
EP2813699A1 (fr) Agencement de tuyauterie de carburant type rampe commune dans des systèmes d'alimentation en carburant
JP2008297947A (ja) コモンレール端末のシール構造
CN107667216B (zh) 高压连接装置、高压燃料泵和用于制造用于高压燃料泵的高压连接装置的方法
JP6855582B2 (ja) 燃料高圧噴射システムの高圧蓄圧器
CN109154263B (zh) 燃料分配装置
WO2020216814A1 (fr) Ensemble rampe commune
US20130193683A1 (en) High pressure fitting
CN114599853A (zh) 包含中间肩部的螺纹连接件

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

AX Request for extension of the european patent

Extension state: BA ME

17P Request for examination filed

Effective date: 20180529

RBV Designated contracting states (corrected)

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

17Q First examination report despatched

Effective date: 20181214

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20190425