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EP1150002A1 - Kraftstoffeinspritzsystem für Brennkraftmaschinen - Google Patents

Kraftstoffeinspritzsystem für Brennkraftmaschinen Download PDF

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Publication number
EP1150002A1
EP1150002A1 EP00108835A EP00108835A EP1150002A1 EP 1150002 A1 EP1150002 A1 EP 1150002A1 EP 00108835 A EP00108835 A EP 00108835A EP 00108835 A EP00108835 A EP 00108835A EP 1150002 A1 EP1150002 A1 EP 1150002A1
Authority
EP
European Patent Office
Prior art keywords
fuel
valve
fuel injection
injection system
internal combustion
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.)
Granted
Application number
EP00108835A
Other languages
English (en)
French (fr)
Other versions
EP1150002B1 (de
Inventor
Michael Figura
Helmut Ruhland
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.)
Ford Global Technologies LLC
Original Assignee
Ford Global Technologies LLC
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 Ford Global Technologies LLC filed Critical Ford Global Technologies LLC
Priority to DE2000603784 priority Critical patent/DE60003784T2/de
Priority to EP20000108835 priority patent/EP1150002B1/de
Priority to JP2001130037A priority patent/JP2001355540A/ja
Publication of EP1150002A1 publication Critical patent/EP1150002A1/de
Application granted granted Critical
Publication of EP1150002B1 publication Critical patent/EP1150002B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • 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
    • 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
    • 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
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/16—Sealing of fuel injection apparatus not otherwise provided for
    • 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
    • F02M2200/856—Mounting of fuel injection apparatus characterised by mounting injector to fuel or common rail, or vice versa

Definitions

  • the invention relates to a fuel injection system with a plurality of electromagnetically operated fuel injection valves.
  • the operation of such injection valves is effected by an electronic control device in dependence of operating parameters of the combustion engine (e.g. air mass flow, required torque, temperature).
  • operating parameters of the combustion engine e.g. air mass flow, required torque, temperature.
  • the amount of fuel which is to be injected is controlled by operation of the electromagnetically operated valves.
  • the fuel injection valves are of the top feed kind which means that the axis of the injector is arranged in a plane which intersects the central axis of a normally cylindrical fuel rail.
  • the electromagnetic valves have a valve housing.
  • the portion of the valve housing which is adjacent to the fuel rail can be described as a fuel supply flange with an internal fuel valve channel and a fuel feed opening on its surface which is normally arranged -when the valve is in its operation position - in a top position with respect to the lower end of the injection valve which is fitted into an opening in the cylinder head which ends in the combustion chamber of the engine.
  • an electrical connector is arranged on the outer surface of the valve housing.
  • the fuel rail which guides fuel to all the injection valves has an internal fuel rail channel which is connectable to a fuel feed and a fuel drain.
  • the fuel rail has integrally connected outer branches with internal fuel branch channels which communicate with the internal fuel rail channel of the fuel rail.
  • the branches are sealingly connectable to the fuel injection valves.
  • the bores in the cylinder head which receive the injection valves can be economically manufactured only with allowing certain tolerances. This is also true for the fuel rail with the branches which have to be connected to the other end of the injectors.
  • a pre-fabricated unit of fuel rail and injectors it is desirable particularly for a pre-fabricated unit of fuel rail and injectors to have a construction which is robust enough to compensate the tolerances, but also serves as tight connection even under high pressures (e.g. 100 - 500 bar for gasoline direct injection or 1000 - 2000 bar for diesel direct injection) in the fuel injection system.
  • high pressures e.g. 100 - 500 bar for gasoline direct injection or 1000 - 2000 bar for diesel direct injection
  • the pre-fabricated unit of fuel rail and injectors include a fuel rail that is fastened to the cylinder head.
  • the fuel supply flange of the valve is sealingly but flexible connected to a first end of an intermediate pipe, the second end of which is sealingly but flexible connected to the branch arranged on the fuel rail.
  • a tensioner device Between the fuel rail and the valve in the direction of the valve axis a force is exerted by a tensioner device.
  • the intermediate pipe has at its both ends a flexible but sealing connection - preferably with O-rings - the various tolerances are compensated as the intermediate pipe can be tilted relative to the axis of the bores in the cylinder head or vice versa relative to the axis of the flanges in the fuel rail.
  • the pre-fabricated fuel injection system is fixed by appropriate clamps as long as the system is not fastened to the cylinder head by the normally used fastening bolts. After the pre-fabricated fuel injection system is fastened to the cylinder head, the holding clamps preferably are removed. By fastening the fuel rail to the cylinder head a force is exerted from the fuel rail to the elastic tensioner device which rests with one surface against the fuel rail resp.
  • the flange which forms an integral part of the fuel rail. From the tensioner device the force is exerted onto an appropriate surface on the pipe which itself rests against an appropriate flange or edge which is arranged on the injection , valve. Further down into the direction of the lower portion of the injection valve where this communicates to the combustion chamber the injection valves rests against an appropriate surface in the cylinder head. By the tensional device any tolerances in the direction of the axis of the injection valve are also compensated.
  • a typical tensioner device is a spring or preferably a stack of plate springs.
  • the dimensions of the spring and the typical parameters of the spring have to be optimised.
  • the tensioner on either end of the pipe or depending on the tolerances also on both ends.
  • the stack of plate springs or the tensioner device could be arranged between the branch and a supporting flange which is mechanically connected to the intermediate pipe.
  • the tensioner device or spring can be arranged between a supporting edge on the valve housing and a supporting flange which is connected to the intermediate pipe.
  • the intermediate pipe with its first end which is in the installed position of the pre-fabricated fuel injection system the upper end is inserted into the internal fuel branch channel of the branch which is integrally formed to the fuel rail.
  • the intermediate pipe at its second end has an opening with an inner diameter which is designed to receive the outer surface of the fuel supply flange of the valve.
  • Fig. 1 shows a plan view of the cylinder head with the fuel injection system in its installed position.
  • the fuel injection system 1 includes the fuel injectors 2 which are shown in their installed position between the air intake channels.
  • the electromagnetically operated fuel injection valves have arranged in their valve housing 3 a front face or top fuel supply 4 which is adjacent to the branch 8 forming an integral part of the fuel rail 6.
  • Electrical connectors 5 serve for the connection between the electromagnetically operated valves and an electronic control unit.
  • the internal fuel rail channel 7 is arranged and can be connected to a fuel feed which would be connected to a fuel pump.
  • the internal fuel rail channel 7 communicates with internal fuel branch channel 7' which downstream towards the injection into the combustion chamber communicate with fuel valve channels 7" arranged in the valve housing 3. Between the fuel branch 8 and the supporting flange 12 of the valve housing 3 a plate spring or stack of plate springs 11 is arranged.
  • the fuel rail 6 is fixed to the cylinder head 14 by means of fasteners 13.
  • the bore 16 which is arranged in the cylinder head 14 to receive the valve has a preferably cone shaped stopper surface 17 against which the valve 2 rests.
  • the force exerted by the fastener 13 is not directly exerted onto the valve 2 by the pipe 10.
  • a cylindrical injector stopper 15 is arranged coaxial with the pipe 10.
  • the spring or spring stack rests against an appropriate surface of the injector stopper which in this embodiment includes a supporting ring 12 which is inserted in the grove arranged in the pipe 10 and thereby not only exerts the force onto the injector stopper but also keeps the pipe 10 in the proper position.
  • the lower joint between the intermediate pipe 10 and the valve housing 3 which is formed by the O-ring 18' and the sealing surfaces on the pipe and the valve housing can be achieved by retaining the O-ring in a groove formed on the pipe.
  • This variation in the design can be also used with the embodiment shown in fig. 2 where the force to keep the valve in place is exerted directly by the pipe.
  • the injector stopper 15 preferably rests against a circumferential edge 19 which is designed to form a seat on the housing of valve.
  • This seat preferably includes a crowned surface 19' at one part of the seat 19 and a conical surface 19" on the other part of the seat.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)
EP20000108835 2000-04-26 2000-04-26 Kraftstoffeinspritzsystem für Brennkraftmaschinen Expired - Lifetime EP1150002B1 (de)

Priority Applications (3)

Application Number Priority Date Filing Date Title
DE2000603784 DE60003784T2 (de) 2000-04-26 2000-04-26 Kraftstoffeinspritzsystem für Brennkraftmaschinen
EP20000108835 EP1150002B1 (de) 2000-04-26 2000-04-26 Kraftstoffeinspritzsystem für Brennkraftmaschinen
JP2001130037A JP2001355540A (ja) 2000-04-26 2001-04-26 内燃機関の燃料噴射システム

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP20000108835 EP1150002B1 (de) 2000-04-26 2000-04-26 Kraftstoffeinspritzsystem für Brennkraftmaschinen

Publications (2)

Publication Number Publication Date
EP1150002A1 true EP1150002A1 (de) 2001-10-31
EP1150002B1 EP1150002B1 (de) 2003-07-09

Family

ID=8168555

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20000108835 Expired - Lifetime EP1150002B1 (de) 2000-04-26 2000-04-26 Kraftstoffeinspritzsystem für Brennkraftmaschinen

Country Status (3)

Country Link
EP (1) EP1150002B1 (de)
JP (1) JP2001355540A (de)
DE (1) DE60003784T2 (de)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002077439A1 (de) * 2001-03-27 2002-10-03 Robert Bosch Gmbh Verbindungsstück zum verbinden einer brennstoffleitung mit einem brennstoffeinspritzventil
WO2007040850A1 (en) * 2005-09-30 2007-04-12 Caterpillar Inc. Fluid system having quill-mounted manifold
EP1818535A1 (de) * 2006-02-08 2007-08-15 Siemens Aktiengesellschaft Verbindungsanordnung zum Verbinden eines Injektors mit einer Fluid-Versorgung
WO2008150567A1 (en) * 2007-06-01 2008-12-11 Lycoming Engines, A Division Of Avco Corporation Fuel delivery system for an aircraft engine
WO2009058283A1 (en) * 2007-10-29 2009-05-07 Caterpillar Inc. Fuel system having a one-piece hollow tube connection
EP2072800A1 (de) * 2007-12-21 2009-06-24 Delphi Technologies, Inc. Brennstoffeinspritz-Klemmuntersatz
US7802560B2 (en) 2007-04-24 2010-09-28 Lycoming Engines, A Division Of Avco Corporation Fuel injector mounting assembly for an aircraft engine fuel delivery system
CN115280011A (zh) * 2020-03-18 2022-11-01 臼井国际产业株式会社 汽油直喷轨

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT509332B1 (de) * 2010-06-22 2011-08-15 Bosch Gmbh Robert Druckrohrstutzen

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4295452A (en) * 1978-07-01 1981-10-20 Robert Bosch Gmbh Fuel injection system
DE4002393A1 (de) 1990-01-27 1991-08-01 Bosch Gmbh Robert Kraftstoffeinspritzsystem fuer brennkraftmaschinen
DE19735665A1 (de) * 1997-06-25 1999-01-07 Bosch Gmbh Robert Brennstoffeinspritzanlage
DE19853090A1 (de) * 1998-11-18 2000-05-25 Bosch Gmbh Robert Brennstoffeinspritzanlage

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4295452A (en) * 1978-07-01 1981-10-20 Robert Bosch Gmbh Fuel injection system
DE4002393A1 (de) 1990-01-27 1991-08-01 Bosch Gmbh Robert Kraftstoffeinspritzsystem fuer brennkraftmaschinen
DE19735665A1 (de) * 1997-06-25 1999-01-07 Bosch Gmbh Robert Brennstoffeinspritzanlage
DE19853090A1 (de) * 1998-11-18 2000-05-25 Bosch Gmbh Robert Brennstoffeinspritzanlage

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7083203B2 (en) 2001-03-27 2006-08-01 Robert Bosch Gmbh Connecting element for connecting a fuel line to a fuel injector
WO2002077439A1 (de) * 2001-03-27 2002-10-03 Robert Bosch Gmbh Verbindungsstück zum verbinden einer brennstoffleitung mit einem brennstoffeinspritzventil
KR100858643B1 (ko) * 2001-03-27 2008-09-17 로베르트 보쉬 게엠베하 연료 분사 밸브와 연료 파이프의 연결을 위한 연결부
US7469680B2 (en) 2005-09-30 2008-12-30 Caterpillar Inc. Fluid system having quill-mounted manifold
WO2007040850A1 (en) * 2005-09-30 2007-04-12 Caterpillar Inc. Fluid system having quill-mounted manifold
EP1818535A1 (de) * 2006-02-08 2007-08-15 Siemens Aktiengesellschaft Verbindungsanordnung zum Verbinden eines Injektors mit einer Fluid-Versorgung
US7802560B2 (en) 2007-04-24 2010-09-28 Lycoming Engines, A Division Of Avco Corporation Fuel injector mounting assembly for an aircraft engine fuel delivery system
WO2008150567A1 (en) * 2007-06-01 2008-12-11 Lycoming Engines, A Division Of Avco Corporation Fuel delivery system for an aircraft engine
US7712452B2 (en) 2007-06-01 2010-05-11 Lycoming Engines, A Division Of Avco Corporation Fuel delivery system for an aircraft engine
WO2009058283A1 (en) * 2007-10-29 2009-05-07 Caterpillar Inc. Fuel system having a one-piece hollow tube connection
EP2072800A1 (de) * 2007-12-21 2009-06-24 Delphi Technologies, Inc. Brennstoffeinspritz-Klemmuntersatz
CN115280011A (zh) * 2020-03-18 2022-11-01 臼井国际产业株式会社 汽油直喷轨
EP4102049A4 (de) * 2020-03-18 2024-02-28 Usui Co., Ltd. Benzindirekteinspritzungsverteilerrohr

Also Published As

Publication number Publication date
EP1150002B1 (de) 2003-07-09
DE60003784D1 (de) 2003-08-14
JP2001355540A (ja) 2001-12-26
DE60003784T2 (de) 2004-06-03

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