EP1332285A1 - Installation d'injection de carburant - Google Patents

Installation d'injection de carburant

Info

Publication number
EP1332285A1
EP1332285A1 EP01993764A EP01993764A EP1332285A1 EP 1332285 A1 EP1332285 A1 EP 1332285A1 EP 01993764 A EP01993764 A EP 01993764A EP 01993764 A EP01993764 A EP 01993764A EP 1332285 A1 EP1332285 A1 EP 1332285A1
Authority
EP
European Patent Office
Prior art keywords
fuel injection
inlet section
seal carrier
fuel
injection system
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
EP01993764A
Other languages
German (de)
English (en)
Other versions
EP1332285B1 (fr
Inventor
Uwe Liskow
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP1332285A1 publication Critical patent/EP1332285A1/fr
Application granted granted Critical
Publication of EP1332285B1 publication Critical patent/EP1332285B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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
    • F02M55/004—Joints; Sealings

Definitions

  • the invention relates to a fuel injection system for injecting fuel into an internal combustion engine, in particular for injecting fuel directly into the combustion chamber or the combustion chambers of the internal combustion engine.
  • the invention relates to a fuel injection system according to the preamble of the main claim •.
  • a fuel injection system is known from DE 197 25 076 AI.
  • annular seal carrier For the sealing connection between a fuel injection valve and an associated connecting piece of a fuel distributor line, it each has an annular seal carrier, which has a first sealing element for sealing the seal carrier against an end face of an inlet section of the fuel injector and with a second sealing element for sealing the seal carrier against the connecting piece of the fuel distributor line interacts.
  • a insertable into a fuel inlet opening of the inlet section penetrates the annular seal carrier, so that the seal carrier between an upstream collar Socket and the inlet section of the fuel injector is locked in the radial direction.
  • a disadvantage of the arrangement described in the abovementioned publication is that an additional component is required through the bushing which can be manufactured with small tolerances. Since the radial mobility of the seal carrier is only guaranteed if it still has a certain axial play and is not pressed against the inlet section by the bushing, the bushing must be inserted into the fuel inlet opening at a precisely defined depth during assembly. For this purpose, a precisely manufactured cylinder surface of the bushing and a bore made with a corresponding fit as a fuel inlet opening are necessary in order to achieve a tight fit of the bushing, as a result of which the required play for the seal carrier can be adjusted.
  • JP-OS 08-312503 It is already known from JP-OS 08-312503 to seal a fuel injector which can be inserted into a receiving bore and has an inlet section by means of an O-ring on this inlet section with respect to a connecting piece of a fuel distributor line.
  • the O-ring seals against an inner wall of the connecting piece.
  • the fuel injection system according to the invention with the characterizing features of the main claim has the advantage that the O-rings used for sealing do not have to compensate for the position and angle deviations by a purely elastic deformation.
  • the O-rings are not deformed on one side.
  • the fuel injection system according to the invention has the advantage over the prior art that the additional component of the precise bush to be manufactured is saved.
  • the fuel injection valve does not have to have an inlet bore made to fit. As a result, the manufacturing effort for these parts can be reduced and the manufacturing costs can be reduced accordingly.
  • first sealing element is guided in a first annular groove in a downstream, radially oriented end face of the seal carrier and is radially slidably movable on the end face of the inlet section of the fuel injector.
  • first sealing element is guided in a first annular groove in the end face of the inlet section of the fuel injection valve and is radially slidable on a downstream, radially oriented end face of the seal carrier. This simplifies the shape of the sealing element.
  • additional annular groove in the end face of the inlet section of the fuel injector is less expensive to manufacture, since precise machining by turning is required in any case on components of the fuel injector.
  • a lower and / or an upper support ring with a larger outer diameter than the seal carrier is present in the second annular groove downstream of the second sealing element and is radially freely movable. This can prevent excessive deformation of the O-ring and the resulting leaks in the fuel injection system.
  • the securing ring can advantageously be welded to the inlet section or held in a groove in the inlet section. If the locking ring is guided in a groove, the manufacturing effort is considerably simplified, since only the position of this ring groove must be taken into account when manufacturing the parts of the fuel injector, which in any case takes place with small tolerances.
  • Fig. 1 shows a section through an inventive
  • Fuel distribution line, Fig. 2 shows a section through a further embodiment according to the invention in a partial representation of the connection area between the fuel injector and the
  • FIG. 3 shows a further embodiment of a fuel injection system according to the invention in a detail corresponding to section III of FIG. 1.
  • Fig. 1 shows an embodiment of the invention in an excerpt, sectional view. Only the connection area between a fuel injection valve 1 and a fuel distribution line 2 is shown. The fuel distribution line 2 is shown here only in the area of a connection piece 3.
  • the fuel injector 1 has an inlet section 4 with a guide section 5, which is formed in one piece with the inlet section 4 of the fuel injector 1.
  • An end face 6 is formed on the inlet section 4 at the transition to the guide section 5.
  • the guide section 5 and the inlet section 4 are penetrated by an inlet bore 8 for the fuel.
  • a seal carrier 9 is penetrated by the guide section 5 and locked between the inlet-side end face 6 of the inlet section 4 and a locking ring 10 which is arranged on the inlet-side end of the guide section 5 and protrudes radially outwards.
  • the retaining ring 10 is preferably arranged on the guide section 5 of the fuel injection valve 1 with an axial distance a from the end face 6 shown for clarity, so that the seal carrier 9 is slightly axially movable with a play b.
  • the Seal carrier 9 is therefore not between the
  • Inlet section 4 of the fuel injector 1 is jammed, but can be moved radially in the radial direction within a displacement range c which is also shown for clarity.
  • the seal carrier 9 has a radially oriented end face 11 opposite the end face 6 of the inlet section 4 of the fuel injection valve 1.
  • a first circumferential annular groove 12 is formed on the seal carrier 9 in the end face 11 and serves to receive and guide a first sealing element 13 in the form of a sealing ring designed as an O-ring.
  • the first sealing element 13 serves as an axial seal and seals the seal carrier 9 with respect to the inlet section 4 of the fuel injection valve 1.
  • the first sealing element 13 is slidably movable on the end face 11 of the inlet section 4 of the fuel injector 1.
  • the seal carrier 9 has a second annular groove 16 on a lateral surface 15 opposite a wall 14 of the connecting piece 3.
  • the second annular groove 16 serves to receive and guide a second sealing element 17 in the form of a sealing ring designed as an O-ring.
  • the second sealing element 17 effects a radial seal and seals the seal carrier 9 from the connecting piece 3.
  • the second sealing element 17 is slidable in the connecting piece 3.
  • the locking ring 10 is inserted in an annular groove 18 in the guide section 5 of the inlet section 4 of the fuel injector 1.
  • the locking ring 10 if it is designed as an open ring, can easily be mounted by spreading it out with a suitable tool and sliding it over the guide section 5. Due to the internal stress of the locking ring 10, this is held in the annular groove 18. If the seal carrier 9 is subjected to the fuel pressure in the operating state, the entire upstream end face 6 of the seal carrier 9 up to its outer diameter is thus available as the contact surface for the fuel pressure on the upstream side. In contrast, the seal carrier 9 at its downstream end is exposed to the fuel pressure up to the first sealing element 13 at most, since the region located further radially is sealed.
  • the seal carrier 9 is therefore acted upon by an effective, axial force component due to the fuel pressure, which presses the seal carrier 9 in the direction of the fuel injection valve 1.
  • the first sealing element 13 is therefore pressed against the end face 6 of the inlet section 4 of the fuel injection valve 1, so that a good sealing effect is produced.
  • the annular seal carrier 9 advantageously enables both radial compensation and axial compensation between the position of the inlet section 4 of the fuel injector 1 and the position of the connecting piece 3.
  • the cost-effective, easy-to-manufacture design of the components is particularly advantageous.
  • the inlet section 4 of the fuel injector 1, like all parts of the fuel injector 1, can be manufactured precisely and can be machined by turning.
  • the formation of a guide section 5 with a pierced ring groove 18 represents a hardly any additional effort. In particular, only one size, namely the distance a between the ring groove 18 and the end face 6, must be exactly observed. Compared to an additional component and a bore to be made to fit, this saves considerable costs. Fig.
  • FIG. 2 shows a further favorable embodiment of a fuel injection system according to the invention in an excerpt, sectional view.
  • the connection area between a fuel injection valve 19 and a fuel distribution line 20 is shown, of which only one connection piece 21 is drawn.
  • the fuel injection valve 19 has an inlet section 22, on which a guide section 23 is formed in one piece.
  • An end face 24 is formed on the inlet section 22 at the transition to the guide section 23.
  • the guide section 23 and the inlet section 22 are penetrated by an inlet bore 26 for the fuel.
  • a seal carrier 27 is penetrated by the guide section 23 and is locked between the inlet-side end face 24 of the inlet section 22 and a locking ring 28, which is arranged on the inlet-side end of the guide section 23 and projects radially outwards.
  • the securing ring 28 is connected to the guide section 23 by a circumferential weld seam 29.
  • the seal carrier 27 is not jammed between the retaining ring 28 of the guide section 23 and the inlet section 22 of the fuel injector 19, but rather is movable in the radial direction.
  • the seal carrier 27 has at its downstream end a radially oriented end face 30 opposite the end face 24 of the inlet section 22 of the fuel injection valve 9.
  • a first circumferential annular groove 31 is formed, which is the receiving and Guidance of a first sealing element 32 in the form of an O-ring is used.
  • the first sealing element 32 slidably seals the seal carrier 27 with respect to the inlet section 22 of the fuel injection valve 19.
  • the seal carrier 27 has a second annular groove 35 on a lateral surface 34 opposite a wall 33 of the connecting piece 21.
  • a second sealing element 36 in the form of an O-ring is guided in the second annular groove 35.
  • the second sealing element 36 seals the seal carrier 27 with respect to the connecting piece 21 in a radially and slidably displaceable manner.
  • the seal carrier 27 is further simplified in that the first annular groove 31 lies in the end face 24 of the fuel injection valve 19.
  • the first annular groove 31 is easier and cheaper to manufacture on the fuel injection valve 19.
  • the mode of operation is in no way impaired by the fact that the first sealing element 32 does not lie in the end face 30 of the seal carrier 27, but rather in the end face 24 of the inlet section 22 of the fuel injection valve 19.
  • FIG. 3 shows a further embodiment of a fuel injection system according to the invention in a detail corresponding to section III of FIG. 1.
  • the embodiment differs from the fuel injection system 1 of FIG. 1 only in this detail section.
  • the same reference numerals are therefore used for the same parts.
  • the seal carrier 9 is shown in section and shows the first annular groove 12 with the first sealing element 13.
  • the second sealing element 17 is guided in the second annular groove 16. In a favorable embodiment it is downstream of the second sealing element 17, which is designed as an O-ring, a support ring 37 is arranged.
  • the inner diameter of the support ring 37 is dimensioned such that it does not extend into the bottom of the second annular groove 16 and is consequently radially movable.
  • the outer diameter of the seal carrier 9 can be made smaller, and the sealing element 17 can be exposed to larger tilting angles without deforming inadmissibly.
  • upstream of the second sealing element 17 is guided in the second annular groove 16 and an upper support ring with a larger outer diameter than the seal carrier 9 is radially freely movable.
  • the seal carrier 9 preferably has a radially circumferential conical bevel 38 at its upstream end.

Landscapes

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

Abstract

La présente invention concerne une installation d'injection de carburant comprenant au moins une soupape d'injection de carburant (1, 19), pourvue d'une partie d'alimentation (4, 22), ainsi qu'une conduite de distributeur de carburant (2, 20), pourvue d'une tubulure de raccord (3, 21) pour chaque soupape d'injection de carburant (1, 19). Un support annulaire (9, 27) de garniture d'étanchéité assure la connexion étanche de la partie d'alimentation (4, 22) à la tubulure de raccord (3, 21). Ce support annulaire de garniture d'étanchéité coopère avec un premier élément d'étanchéité (13, 32), afin d'assurer l'étanchéité du support (9, 27) de garniture d'étanchéité par rapport à une face (6, 24) de la partie d'alimentation (4, 22), et avec un second élément d'étanchéité (17, 36), afin d'assurer l'étanchéité du support (9, 27) de garniture d'étanchéité par rapport à la tubulure de raccord (3, 21). Une partie de guidage (5, 23) de la partie d'alimentation (4, 22) traverse le support (9, 27) de garniture d'étanchéité et un anneau de sécurité (10, 28) situé sur la partie d'alimentation (4, 22) bloque le support (9, 27) de garniture d'étanchéité mobile en direction radiale, entre l'anneau de sécurité (10, 28) et la face (6, 24) de la partie d'alimentation (4, 22).
EP01993764A 2000-11-11 2001-11-12 Installation d'injection de carburant Expired - Lifetime EP1332285B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10056038 2000-11-11
DE10056038A DE10056038A1 (de) 2000-11-11 2000-11-11 Brennstoffeinspritzanlage
PCT/DE2001/004207 WO2002038950A1 (fr) 2000-11-11 2001-11-12 Installation d'injection de carburant

Publications (2)

Publication Number Publication Date
EP1332285A1 true EP1332285A1 (fr) 2003-08-06
EP1332285B1 EP1332285B1 (fr) 2004-06-16

Family

ID=7663019

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01993764A Expired - Lifetime EP1332285B1 (fr) 2000-11-11 2001-11-12 Installation d'injection de carburant

Country Status (5)

Country Link
US (1) US7195003B2 (fr)
EP (1) EP1332285B1 (fr)
JP (1) JP4092197B2 (fr)
DE (2) DE10056038A1 (fr)
WO (1) WO2002038950A1 (fr)

Families Citing this family (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10256668A1 (de) 2002-12-04 2004-07-29 Robert Bosch Gmbh Stützelement
DE10304742A1 (de) * 2003-02-06 2004-08-19 Robert Bosch Gmbh Kraftstoffeinspritzeinrichtung für eine Brennkraftmaschine
DE102004055317A1 (de) 2004-11-16 2006-05-24 Bosch Rexroth Aktiengesellschaft Elektrische Drehfeldmaschine und Primärteil
US7455050B2 (en) * 2006-12-13 2008-11-25 Delphi Technologies, Inc. O-ring retainer for a fuel injector in a fuel rail socket
US20090013968A1 (en) * 2007-07-09 2009-01-15 Keegan Kevin R Vapor recovery system for a direct injector fuel rail assembly
EP2093414B1 (fr) * 2008-02-19 2011-07-20 Continental Automotive GmbH Dispositif de couplage
DE602008004620D1 (de) * 2008-02-19 2011-03-03 Continental Automotive Gmbh Kupplungsvorrichtung
EP2093413B1 (fr) * 2008-02-19 2011-01-12 Continental Automotive GmbH Dispositif de couplage
EP2093412B1 (fr) * 2008-02-19 2011-01-19 Continental Automotive GmbH Dispositif de couplage
EP2112367B1 (fr) * 2008-04-23 2011-09-14 Continental Automotive GmbH Agencement de couplage et injecteur de carburant
US20090321536A1 (en) * 2008-06-30 2009-12-31 Caterpillar Inc. Piston having channel extending through piston head
EP2148082B1 (fr) * 2008-07-24 2011-10-19 Continental Automotive GmbH Arrangement de couplage pour une soupape d'injection et soupape d'injection
EP2208883B1 (fr) * 2009-01-19 2015-07-22 Continental Automotive GmbH Dispositif de couplage
US8069842B2 (en) * 2009-07-02 2011-12-06 Robert Bosch Gmbh Injector mounting assembly
DE102011087954A1 (de) * 2011-12-08 2013-06-13 Robert Bosch Gmbh Einspritzventil, insbesondere für eine Brennkraftmaschine
DE102013222508B4 (de) 2013-11-06 2023-07-27 Robert Bosch Gmbh Ventil zum Zumessen von unter Hochdruck stehendem Fluid
DE102017108270B4 (de) 2017-04-19 2023-11-09 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Dichtungskassette für einen Injektor einer Verbrennungskraftmaschine und Injektoranordnung für eine Verbrennungskraftmaschine
JP6962208B2 (ja) * 2018-01-17 2021-11-05 トヨタ自動車株式会社 密封構造
US11174825B2 (en) * 2019-02-11 2021-11-16 Caterpillar Inc. Seal configuration for fuel injector
DE102019216587A1 (de) * 2019-10-29 2021-04-29 Robert Bosch Gmbh Brennstoffeinspritzventil

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Also Published As

Publication number Publication date
US20050115546A1 (en) 2005-06-02
US7195003B2 (en) 2007-03-27
WO2002038950A1 (fr) 2002-05-16
JP4092197B2 (ja) 2008-05-28
DE10056038A1 (de) 2002-05-16
DE50102634D1 (de) 2004-07-22
EP1332285B1 (fr) 2004-06-16
JP2004513298A (ja) 2004-04-30

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