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EP1150002B1 - Système d'injection de carburant pour moteurs à combustion interne - Google Patents

Système d'injection de carburant pour moteurs à combustion interne Download PDF

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Publication number
EP1150002B1
EP1150002B1 EP20000108835 EP00108835A EP1150002B1 EP 1150002 B1 EP1150002 B1 EP 1150002B1 EP 20000108835 EP20000108835 EP 20000108835 EP 00108835 A EP00108835 A EP 00108835A EP 1150002 B1 EP1150002 B1 EP 1150002B1
Authority
EP
European Patent Office
Prior art keywords
fuel
valve
fuel injection
injection system
combustion engines
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.)
Expired - Lifetime
Application number
EP20000108835
Other languages
German (de)
English (en)
Other versions
EP1150002A1 (fr
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/fr
Priority to JP2001130037A priority patent/JP2001355540A/ja
Publication of EP1150002A1 publication Critical patent/EP1150002A1/fr
Application granted granted Critical
Publication of EP1150002B1 publication Critical patent/EP1150002B1/fr
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.
  • the 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)

Claims (6)

  1. Système d'injection de carburant (1) pour moteurs à combustion interne
    avec une pluralité de clapets d'injection de carburant à commande électromagnétique (2)
    qui ont un logement de clapet (3) avec une ouverture d'arrivée de carburant sur la surface supérieure (4) dans une bride d'alimentation de carburant (9) et des canaux internes de clapet d'alimentation de carburant (7''),
    avec des connecteurs électriques (5) pour commander le fonctionnement des clapets d'injection de carburant (2),
    avec une rampe d'injection (6) ayant un canal interne de rampe d'injection (7) qui est connectable à une arrivée de carburant et à un retour de carburant et
    dont ladite rampe d'injection (6) a des branchements (8) connectés intégralement avec les canaux internes de branchement d'alimentation de carburant (7') connectés au canal de rampe d'injection (7)
    lesquels branchements (8) sont connectables de façon étanche aux clapets (2)
    ladite rampe d'injection est fixée à la culasse,
    et ladite bride d'alimentation de carburant (9) du clapet (2) est connectée de manière flexible et étanche à une première extrémité d'un tuyau intermédiaire (10) dont la deuxième extrémité est connectée de manière flexible et étanche au branchement (8) et
    entre la rampe d'injection (6) et le clapet (2) une force est exercée par un dispositif tendeur (11) et ledit dispositif tendeur (11) est un ressort.
  2. Système d'injection de carburant (1) pour moteurs à combustion interne selon la revendication 1, caractérisé en ce que le ressort est agencé entre le branchement (8) et une bride de support (12) qui est connectée mécaniquement au tuyau intermédiaire (10).
  3. Système d'injection de carburant (1) pour moteurs à combustion interne selon la revendication 1, caractérisé en ce que le ressort est agencé entre un bord de support du logement de clapet (3) et une bride de support (12) qui est connectée mécaniquement au tuyau intermédiaire (10').
  4. Système d'injection de carburant (1) pour moteurs à combustion interne selon l'une quelconque des revendications 1 à 3, caractérisé en ce que le tuyau intermédiaire avec sa première extrémité est inséré dans les canaux internes de branchement d'alimentation de carburant (7') du branchement (8).
  5. Système d'injection de carburant (1) pour moteurs à combustion interne selon l'une quelconque des revendications 1 à 4, caractérisé en ce que le tuyau intermédiaire comporte à sa deuxième extrémité une ouverture dont le diamètre interne est conçu pour recevoir la surface extérieure de la bride d'alimentation de carburant (9) du clapet (2).
  6. Système d'injection de carburant (1) pour moteurs à combustion interne selon l'une quelconque des revendications 1 à 4, caractérisé en ce que le tuyau intermédiaire comporte à sa deuxième extrémité une ouverture dont le diamètre externe est conçu pour être reçu dans la surface intérieure de la bride d'alimentation de carburant (9) du clapet (2).
EP20000108835 2000-04-26 2000-04-26 Système d'injection de carburant pour moteurs à combustion interne Expired - Lifetime EP1150002B1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
DE2000603784 DE60003784T2 (de) 2000-04-26 2000-04-26 Kraftstoffeinspritzsystem für Brennkraftmaschinen
EP20000108835 EP1150002B1 (fr) 2000-04-26 2000-04-26 Système d'injection de carburant pour moteurs à combustion interne
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 (fr) 2000-04-26 2000-04-26 Système d'injection de carburant pour moteurs à combustion interne

Publications (2)

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

Family

ID=8168555

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20000108835 Expired - Lifetime EP1150002B1 (fr) 2000-04-26 2000-04-26 Système d'injection de carburant pour moteurs à combustion interne

Country Status (3)

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

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20130092131A1 (en) * 2010-06-22 2013-04-18 Robert Bosch Gmbh Inlet connector

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10115048A1 (de) * 2001-03-27 2002-10-02 Bosch Gmbh Robert Verbindungsstück zum Verbinden einer Brennstoffleitung mit einem Brennstoffeinspritzventil
US7469680B2 (en) * 2005-09-30 2008-12-30 Caterpillar Inc. Fluid system having quill-mounted manifold
EP1818535B1 (fr) * 2006-02-08 2008-09-17 Siemens Aktiengesellschaft Dispositif de raccordement pour raccorder un injecteur à un alimentation de fluide
US7415968B1 (en) 2007-04-24 2008-08-26 Lycoming Engines, A Division Of Avco Corporation Modular fuel delivery assembly 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
US7543567B2 (en) * 2007-10-29 2009-06-09 Caterpillar Inc. Fuel system having a one-piece hollow tube connection
EP2072800A1 (fr) * 2007-12-21 2009-06-24 Delphi Technologies, Inc. Sous-ensemble de fixation d'injecteur de carburant
JP2021148047A (ja) * 2020-03-18 2021-09-27 臼井国際産業株式会社 ガソリン直噴レール

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2829057A1 (de) * 1978-07-01 1980-01-10 Bosch Gmbh Robert Kraftstoffeinspritzanlage
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 (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20130092131A1 (en) * 2010-06-22 2013-04-18 Robert Bosch Gmbh Inlet connector

Also Published As

Publication number Publication date
JP2001355540A (ja) 2001-12-26
DE60003784T2 (de) 2004-06-03
EP1150002A1 (fr) 2001-10-31
DE60003784D1 (de) 2003-08-14

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