EP1108886B1 - Systeme d'injection de carburant avec un common rail - Google Patents

Systeme d'injection de carburant avec un common rail Download PDF

Info

Publication number
EP1108886B1
EP1108886B1 EP00124776A EP00124776A EP1108886B1 EP 1108886 B1 EP1108886 B1 EP 1108886B1 EP 00124776 A EP00124776 A EP 00124776A EP 00124776 A EP00124776 A EP 00124776A EP 1108886 B1 EP1108886 B1 EP 1108886B1
Authority
EP
European Patent Office
Prior art keywords
rail
cylinder head
injector
pressure tube
claw
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
EP00124776A
Other languages
German (de)
English (en)
Other versions
EP1108886A2 (fr
EP1108886A3 (fr
Inventor
Heribert Dipl.-Ing. Möller (FH)
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.)
MAN Truck and Bus SE
Original Assignee
MAN Nutzfahrzeuge AG
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 MAN Nutzfahrzeuge AG filed Critical MAN Nutzfahrzeuge AG
Publication of EP1108886A2 publication Critical patent/EP1108886A2/fr
Publication of EP1108886A3 publication Critical patent/EP1108886A3/fr
Application granted granted Critical
Publication of EP1108886B1 publication Critical patent/EP1108886B1/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
    • 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
    • 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
    • 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

Definitions

  • the invention relates to a common rail injection system according to the preamble of claim 1.
  • a common rail injection system in which an injector Located in the cylinder axis is arranged centrally in the cylinder head.
  • the connection the injector with the fuel-carrying rail is produced via a pressure tube, which is arranged in a transverse bore in the cylinder head.
  • the Pressure tube has at its two ends sealing surfaces on the means of a claw and a screw in the cylinder head are kept under tension.
  • the claw itself has a hole and is connected via a screw with the rail. to easier mounting has the screw at its ends a right and a left-handed thread on.
  • an injection system of the type mentioned are several Components required and the claws require an angled bore to unwanted Reflections of pressure waves can give rise.
  • the invention is based on the object the compound of common rail and injector with as few components as possible and as easy to assemble as possible.
  • the object is firstly by the characterizing features of claim 1 solved.
  • the structural unit of Rail and Pratze requires fewer parts and the Assembly easier.
  • the fuel reaches the shortest path and straight to the injector, whereby reflections of pressure waves at deflections and the like be avoided.
  • FIG. 1 shows a side view of a cylinder head 1.
  • a rail. 2 fastened directly by means of screws 3 and claws 4.
  • the claws 4 associated with each injector 5 form a structural unit with the rail 2, for example, a forging. This is described in more detail in FIG.
  • FIG. 2 shows a section II-II according to FIG. 3.
  • the injector 5 is located in a bore of the cylinder head 1.
  • the fuel supply to the injector 5 via the rail 2 and a pressure tube 6, which in a Bore is arranged transversely through the cylinder head 1.
  • a flow restrictor 7 is provided, the threaded 8 into the Rail 2 is screwed, this is not upper part of the invention.
  • the attachment serve each injector 5 (Fig. 1) a claw 4 with the Rail 2 is combined to form a structural unit.
  • Rail 2 and the claws 4 can be advantageously designed as a forged part.
  • To the claw 4 and the Giving Rail 2 a certain amount of spherical motion is a counter bearing formed on the cylinder head as a dome 9.
  • FIG. 3 A plan view of a part of the cylinder head 1 is shown in FIG. 3.
  • the rail 2 is ever an injector 5 fixed directly to the cylinder head 1 by means of screw 3 and claw 4.
  • the Fuel supply from the rail 2 to the injector takes place through the pressure pipe 6 (FIG. 2), which is indicated here only by a dashed line.
  • FIG 4. An end view is shown in FIG 4.
  • the Rail 2 forms with the claw 4 a structural Unit which is fastened with screw 3 on the cylinder head 1.
  • the Rail 2 can also be used with single 4 pcs Cylinder head to be attached. An advantage of this attachment can be seen therein be that the rail 2 can remain unchanged.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)

Claims (2)

  1. Système d'injection Common Rail, composé d'un injecteur (5) disposé dans la tête de cylindre (1), un rail (2) pour l'amenée de carburant et une conduite de refoulement qui relie le rail et l'injecteur, la conduite de refoulement (6) étant introduite dans la tête de cylindre par un alésage et l'étanchéité étant obtenue aux deux extrémités de la conduite de refoulement par la pression d'une fourche (4) qui est fixée au moyen d'une vis (3) sur la tête de cylindre, le rail (2) étant fixé directement avec la vis (3) et la fourche (4) sur la tête de cylindre (1) et le rail (2) et la fourche (3) formant une unité en construction, par exemple une pièce forgée,
    caractérisé en ce que
    le rail est relié directement à la conduite de refoulement (6).
  2. Système d'injection Common Rail, composé d'un injecteur (5) disposé dans la tête de cylindre (1), un rail (2) pour l'amenée de carburant et une conduite de refoulement qui relie le rail et l'injecteur, la conduite de refoulement (6) étant introduite dans la tête de cylindre par un alésage et l'étanchéité étant obtenue aux deux extrémités de la conduite de refoulement par la pression d'une fourche (4) qui est fixée au moyen d'une vis (3) sur la tête de cylindre, le rail (2) étant fixé directement sur la tête de cylindre (1) et le rail (2) étant fixé sur la tête de cylindre (1) par une fourche (4) distincte et une vis (3),
    caractérisé en ce que
    le rail est relié directement à la conduite de refoulement (6).
EP00124776A 1999-12-15 2000-11-14 Systeme d'injection de carburant avec un common rail Expired - Lifetime EP1108886B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19960480A DE19960480A1 (de) 1999-12-15 1999-12-15 Common Rail Einspritzsystem
DE19960480 1999-12-15

Publications (3)

Publication Number Publication Date
EP1108886A2 EP1108886A2 (fr) 2001-06-20
EP1108886A3 EP1108886A3 (fr) 2003-11-26
EP1108886B1 true EP1108886B1 (fr) 2005-01-19

Family

ID=7932750

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00124776A Expired - Lifetime EP1108886B1 (fr) 1999-12-15 2000-11-14 Systeme d'injection de carburant avec un common rail

Country Status (2)

Country Link
EP (1) EP1108886B1 (fr)
DE (2) DE19960480A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2188516B1 (fr) 2007-09-13 2011-10-26 Ganser-Hydromag AG Dispositif d'injection de carburant
US7543567B2 (en) * 2007-10-29 2009-06-09 Caterpillar Inc. Fuel system having a one-piece hollow tube connection
ATE527444T1 (de) * 2007-11-13 2011-10-15 Delphi Tech Holding Sarl Brennstofflanze

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4539959A (en) * 1984-02-27 1985-09-10 General Motors Corporation Fuel injection system with fuel flow limiting valve assembly
JP3371620B2 (ja) * 1995-05-29 2003-01-27 いすゞ自動車株式会社 コモンレール式燃料噴射装置
DE19640480B4 (de) * 1996-09-30 2004-04-22 Robert Bosch Gmbh Kraftstoffhochdruckspeicher
DE19754132B4 (de) * 1997-12-05 2005-06-23 Man Nutzfahrzeuge Ag Common Rail Einspritzsystem für Brennkraftmaschinen

Also Published As

Publication number Publication date
DE19960480A1 (de) 2001-06-21
EP1108886A2 (fr) 2001-06-20
DE50009273D1 (de) 2005-02-24
EP1108886A3 (fr) 2003-11-26

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