EP2286082B1 - A high pressure fuel connection arrangement to an injector holder in a common rail system - Google Patents

A high pressure fuel connection arrangement to an injector holder in a common rail system Download PDF

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Publication number
EP2286082B1
EP2286082B1 EP09757668.0A EP09757668A EP2286082B1 EP 2286082 B1 EP2286082 B1 EP 2286082B1 EP 09757668 A EP09757668 A EP 09757668A EP 2286082 B1 EP2286082 B1 EP 2286082B1
Authority
EP
European Patent Office
Prior art keywords
pipe means
chamber
injector holder
cylinder head
pipe
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.)
Active
Application number
EP09757668.0A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2286082A2 (en
Inventor
Carl-Erik Rösgren
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.)
Wartsila Finland Oy
Original Assignee
Wartsila Finland Oy
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 Wartsila Finland Oy filed Critical Wartsila Finland Oy
Publication of EP2286082A2 publication Critical patent/EP2286082A2/en
Application granted granted Critical
Publication of EP2286082B1 publication Critical patent/EP2286082B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • F02M55/002—Arrangement of leakage or drain conduits in or from 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
    • F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
    • F02M55/004—Joints; Sealings
    • F02M55/005—Joints; Sealings for high pressure conduits, e.g. connected to pump outlet or to injector inlet
    • 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
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F1/00—Cylinders; Cylinder heads 
    • F02F1/24—Cylinder heads
    • F02F1/242—Arrangement of spark plugs or injectors

Definitions

  • the invention relates to a high pressure fuel connection arrangement to an injector holder in a common rail system for a large internal combustion engine according to the preamble of claim 1.
  • large internal combustion engine refers to such engines that are used, for example, as main propulsion engines or auxiliary engines in ships or in power plants for the production of heat and/or electricity.
  • DE 4239173 C1 shows a mounting arrangement for an injector in a cylinder head in accordance with the preamble of claim 1.
  • An object of the invention is to provide a new connection arrangement, which solves the above mentioned and other problems of the prior art. It is also an object of the invention to provide a reliable connection arrangement with uncomplicated construction. A further object is to provide an arrangement which makes it possible to handle and control leakage draining out from the outside of the injector holder and, thus, to enable controlling the condition of the injection equipment.
  • the arrangement includes fixing means arranged in threaded connection with a first part of a chamber in the cylinder head for fixing the second pipe means tightly to the injector holder, the fixing means exerting the fixing force through an enlarged part with suitable counter surface arranged in the second pipe means.
  • Said chamber is arranged in communication with the injector holder through a second part of the chamber, the second pipe means being at least of substantial length spaced apart from said chamber between the fixing means and the injector holder.
  • the length of the second pipe means between the fixing means and the injector holder and the diameter of the chamber are selected so as to allow slight bending of the second pipe means located therein under certain strain caused by the fixing means.
  • the use of pipe means with a long loaded length provides a better retained strain when pipe working lengths change due to thermal loading changes.
  • the second pipe means may be provided with a supporting element for supporting it to the cylinder head along the second part of the chamber.
  • the length of the second pipe means between the enlarged part and the second end is with advantage from about 10 to 20 times the diameter thereof.
  • the diameter of the chamber is respectively about 40% - 100% larger than the second pipe means located therein.
  • the chamber When the chamber is arranged to collect so called dirty leakage draining from the external surface of the injector holder this chamber is practically pressureless since the question is only about a sealing mixture dribble. Notwithstanding, the cylinder head is in this case with advantage provided with a duct or the like for leading the collected leakage away from the chamber and the cylinder head. This allows for control of the volume of the leakage and detection of any larger leakages.
  • the first part of the chamber is with advantage bounded by the cylinder head, the fixing means and the second pipe means including the enlarged part thereof.
  • the diameter of the first part of the chamber is with advantage substantially larger than the diameter of the second part of the chamber and includes substantial free space for collecting said leakage.
  • the fixing means is preferably a sleeve formed bolt element through which the second pipe means is fitted.
  • the fixing means can easily be tightened by means of ordinary tools and it is in no direct connection with the high pressure fuel supplied through the pipe means.
  • the contact surface of the fixing means is cone formed and its counter surface in the enlarged part is either ball formed or cone formed.
  • the head of the second end of the second pipe means is preferably ball shaped and its counter surface in the injector holder is cone formed. Ball shape of the head of the second end of the second pipe means is ideal to comply with possible misalignments as the pipe means bends on the assembly into the cylinder head.
  • the reference numeral 1 indicates a cylinder head of an internal combustion engine supporting an injector holder 2 by means of which high pressure fuel is injected into a cylinder of the engine in a way known as such (not shown).
  • High pressure fuel provided by a common rail system (not shown) is delivered through a first pipe means 3 into the cylinder head 2 and a second pipe means 4 is provided for supplying the high pressure fuel further within the cylinder head 1 into the injector holder 2.
  • a first end 4a of the second pipe means 4 is tightly connected with the first pipe means 3.
  • Any suitable fixing means 10 for example a sleeve with threaded connection with the pipe end 4a, may be provided for securing the tight connection between the first and the second pipe means 3 and 4.
  • the second end 4b of the second pipe means 4 is in direct connection with the injector holder 2 by means of mutual contact surfaces 4e and 2a respectively.
  • the surface 2a may be cone formed and the surface 4e is preferably ball shaped for providing a reliable and tight engagement.
  • the cylinder head 1 is provided with a chamber 5,6 which is in communication with the clearance 11 between the cylinder head 1 and the injector holder 2 and locating a substantial part of the second pipe means 4.
  • the arrangement includes further a fixing means 7, for instance a sleeve or the like bolt element, through which the second pipe means 4 is led and which is engaged by threads 8 with a first part 5 of the chamber 5,6 in the cylinder head 2.
  • the second pipe means 4 is provided with an enlarged part 4c with a counter surface 4d arranged in cooperation with the surface 7a in the fixing means 7.
  • These surfaces 4d and 7a can be cone formed.
  • the surface 4d may with advantage be also ball formed so as to better comply with possible bending of the second pipe means as discussed below.
  • the pipe means 4 can be tightly sealed to the counter surface 7a of the fixing means 7 more close to the first end 4a of the second pipe means 4.
  • the enlarged part 4c need not be an integral part of the second pipe means 4 but if desired it may also be implemented as a separate threaded connection sleeve for instance.
  • the part of the second pipe means 4 between the enlarged part and the injector holder 2 is of substantial length especially in view of its diameter.
  • the advantage of this kind of layout of the second pipe means 4 within the second part of the chamber 6 is the long strain length which enables retention of load despite fuel temperature operation extremes of 40°C up to 150°C with heavy fuel oil. If needed a second part 6 of the chamber 5,6 allows some bending of the second pipe means 4 so that sufficient retention of load can be maintained under different conditions.
  • this part of the second pipe means 4 may be provided with some guidance to provide limits to a bending of this kind. In the figure this is only schematically indicated by means of a supporting element 13.
  • the first part 5 of the chamber 5,6 is through the second part 6 of the chamber 5,6 in communication with the clearance 11 in which a sealing mixture dribble drains out from the injector holder to the external surface thereof. Therefore these chamber parts 5 and 6 may with advantage be utilised for collecting this so called dirty leakage, which can be led away from the cylinder head 1 by means of a duct 12. This leakage may then be followed and a sudden and sufficient increase may be detected possibly indicating a large leakage to be taken care of to avoid any damage of the equipment.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)
EP09757668.0A 2008-06-05 2009-05-27 A high pressure fuel connection arrangement to an injector holder in a common rail system Active EP2286082B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI20085556A FI120843B (fi) 2008-06-05 2008-06-05 Korkeapainepolttoaineen liitäntäjärjestely ruiskutussuuttimeen yhteispainevarastoon perustuvassa järjestelmässä
PCT/FI2009/050447 WO2009147290A2 (en) 2008-06-05 2009-05-27 A high pressure fuel connection arrangement to an injector holder in a common rail system

Publications (2)

Publication Number Publication Date
EP2286082A2 EP2286082A2 (en) 2011-02-23
EP2286082B1 true EP2286082B1 (en) 2013-07-03

Family

ID=39589322

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09757668.0A Active EP2286082B1 (en) 2008-06-05 2009-05-27 A high pressure fuel connection arrangement to an injector holder in a common rail system

Country Status (6)

Country Link
EP (1) EP2286082B1 (fi)
KR (1) KR101522063B1 (fi)
CN (1) CN102046959B (fi)
FI (1) FI120843B (fi)
RU (1) RU2499908C2 (fi)
WO (1) WO2009147290A2 (fi)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103967667A (zh) * 2014-04-16 2014-08-06 中国北方发动机研究所(天津) 一种高压燃油管转接件

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT509177B1 (de) * 2009-11-23 2013-09-15 Bosch Gmbh Robert Druckrohrstutzen für common-rail-einspritzsystem
EP2589791B1 (en) * 2011-11-04 2014-12-17 Caterpillar Motoren GmbH & Co. KG Fuel inlet valve and cylinder head for housing a fuel inlet valve
FR3028296B1 (fr) * 2014-11-07 2016-11-11 Delphi Int Operations Luxembourg Sarl Dispositif anti rotation d'une lance a carburant

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2133287A5 (fi) * 1971-04-15 1972-11-24 Semt
US3845748A (en) * 1972-09-29 1974-11-05 Mack Trucks Fuel injection nozzle holder installation
DE2910678C2 (de) * 1978-03-21 1985-09-05 Tatra N.P., Kopřivnice Schraubverbindung für Druckleitungen
DE4239173C1 (en) * 1992-11-21 1993-09-02 Mercedes-Benz Aktiengesellschaft, 70327 Stuttgart, De Cylinder-head for fuel-injection engine - has pressure pipe passing through clamping screw and with union at protruding end for injection pipe
RU2117816C1 (ru) * 1997-02-25 1998-08-20 Открытое акционерное общество "Коломенский завод" Топливопровод высокого давления двигателя внутреннего сгорания
DE19853090A1 (de) * 1998-11-18 2000-05-25 Bosch Gmbh Robert Brennstoffeinspritzanlage
FI108070B (fi) * 2000-04-27 2001-11-15 Waertsilae Tech Oy Ab Laitteisto polttoainevuodon paikallistamiseksi polttomoottorin yhteydessä
US6827065B2 (en) * 2003-04-08 2004-12-07 General Motors Corporation Diesel injection system with dual flow fuel line
FI119702B (fi) * 2003-10-17 2009-02-13 Waertsilae Finland Oy Polttomoottorin laitteisto korkeapaineputken vuotoja varten
DE102006049224B4 (de) * 2006-10-18 2018-08-02 Man Diesel & Turbo Se Kraftstoffversorgungsanlage einer Brennkraftmaschine

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103967667A (zh) * 2014-04-16 2014-08-06 中国北方发动机研究所(天津) 一种高压燃油管转接件

Also Published As

Publication number Publication date
CN102046959A (zh) 2011-05-04
WO2009147290A2 (en) 2009-12-10
FI20085556A (fi) 2009-12-06
RU2010154616A (ru) 2012-07-20
FI120843B (fi) 2010-03-31
RU2499908C2 (ru) 2013-11-27
KR20110013428A (ko) 2011-02-09
KR101522063B1 (ko) 2015-05-20
EP2286082A2 (en) 2011-02-23
CN102046959B (zh) 2013-04-24
WO2009147290A3 (en) 2010-01-21
FI20085556A0 (fi) 2008-06-05

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