EP1255039A2 - Injecteur de combustible - Google Patents

Injecteur de combustible Download PDF

Info

Publication number
EP1255039A2
EP1255039A2 EP02100373A EP02100373A EP1255039A2 EP 1255039 A2 EP1255039 A2 EP 1255039A2 EP 02100373 A EP02100373 A EP 02100373A EP 02100373 A EP02100373 A EP 02100373A EP 1255039 A2 EP1255039 A2 EP 1255039A2
Authority
EP
European Patent Office
Prior art keywords
injector
column
fuel
injector module
bore
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
EP02100373A
Other languages
German (de)
English (en)
Other versions
EP1255039B1 (fr
EP1255039A3 (fr
Inventor
Wendelin KLÜGL
Günter LEWENTZ
Gerd Schmutzler
Andreas Voigt
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.)
Continental Automotive GmbH
Original Assignee
Siemens AG
Continental Automotive 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 Siemens AG, Continental Automotive GmbH filed Critical Siemens AG
Publication of EP1255039A2 publication Critical patent/EP1255039A2/fr
Publication of EP1255039A3 publication Critical patent/EP1255039A3/fr
Application granted granted Critical
Publication of EP1255039B1 publication Critical patent/EP1255039B1/fr
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
    • F02M61/168—Assembling; Disassembling; Manufacturing; Adjusting
    • 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
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/16—Sealing of fuel injection apparatus not otherwise provided for

Definitions

  • the invention relates to a fuel injector.
  • a fuel injector is known, the one first injector module and an adjacent second injector module having.
  • the injector modules are in a nozzle clamping nut arranged.
  • a high pressure bore is through the injector modules guided. So because of the high pressure in the high pressure bore no fuel through the gaps caused by contact areas is formed between the injector modules, in the gap caused by contact surfaces between the nozzle clamping nut and the injector modules is formed, exits and from there into the surroundings of the fuel injector the injector modules through the nozzle clamping nut with a high axial preload force pressed against each other.
  • the surface pressure is particularly high, since at least one the contact areas an increased partial area in the outer area has, so that the entire biasing force only on this Partial effect.
  • the increased partial area prevents leakage of fuel in the gap through contact surfaces formed between the nozzle clamping nut and the injector modules becomes.
  • Located in the inner area of the contact area a lowered partial surface, which is used to discharge from the high pressure bore escaping fuel with a return hole connected is.
  • the invention has for its object a fuel injector to be specified in relation to the prior art smaller preload forces has a higher high pressure tightness.
  • the task is solved by using a fuel injector the following features:
  • the fuel injector has a housing that consists of at least one nozzle clamping nut, one formed first injector module and a second injector module becomes.
  • the first injector module and the second injector module adjoin each other and are arranged in the nozzle clamping nut.
  • the fuel injector has at least one high-pressure bore for fuel on through the first injector module and the second injector module is guided. Further the fuel injector has at least one return bore for fuel, which is arranged in the housing.
  • contact surfaces form a first column between the injector modules, which is adjacent to the high pressure hole.
  • Contact areas between the nozzle clamping nut and the injector modules form one second column connected to the first column.
  • Fuel that has entered the second column borders the return line to the second column.
  • the fuel injector is in such a way that the second column to the environment of the Fuel injector is sealed.
  • the preload force with which the injector modules are pressed against each other, in one for the material strength of the injector modules and the Nozzle clamping nut in a safe area.
  • the high pressure tightness is achieved without enlargement of the installation space.
  • the second column can, for example, with the help of an O-ring seal be sealed.
  • the O-ring seal is for example between the nozzle clamping nut and the first injector module arranged.
  • Teflon coated screw connection can be used.
  • a special one good sealing can be achieved by screwing with a microencapsulated adhesive or sealant is coated. When screwing, the capsules break open and release the adhesive or sealant.
  • a surface pressure can also be used to seal the second Contribute column.
  • the nozzle nut a projection against which an injector module with an axial Preload force is pressed.
  • the return hole can consist of at least one main hole and an adjacent relief hole, the Main bore essentially perpendicular to the contact surfaces runs between the injector modules and the relief bore laterally from the second injector module into the second column emerges.
  • the return bore at least from a main bore and an adjacent relief groove consists, with the main bore essentially perpendicular to the contact surfaces between the injector modules runs and wherein the relief groove on at least one of the Contact surfaces between the injector modules introduced in this way is that the relief groove is adjacent to the second column.
  • a first fuel injector provided with a housing in which a nozzle needle D, a piston K, a high pressure bore H, a return bore R and a spring F are arranged.
  • the high pressure bore H is connected to the nozzle needle D such that at pulled piston K the nozzle needle D due to the pressure of fuel in the high pressure bore pushed up becomes.
  • the piston K is controlled by an actuator-controlled servo valve (not shown) actuated.
  • the return line R is connected to a chamber in which the piston K and a Return spring F are arranged.
  • the housing consists u. a. from a first injector module I1, a second injector module I2, a third injector module I3 and a nozzle clamping nut DS.
  • the injector modules I1, I2, I3 are arranged one above the other and in the nozzle clamping nut DS (see Figure 1). Through the nozzle clamping nut DS Injector modules I1, I2, I3 with a preload against each other pressed.
  • the high pressure bore H is through all three injector modules I1, I2, I3 led.
  • the return hole R is through the first injector module I1 guided and extends into the second injector module I2 into it.
  • the nozzle clamping nut DS is connected by a screw V connected to the first injector module I1.
  • the screw connection V is coated with Teflon.
  • An O-ring seal O is provided below the screw connection V.
  • the nozzle clamping nut DS has one in the area of the nozzle needle D. inward protrusion against which the third Injector module I3 is pressed axially.
  • first column S1 Contact areas between the first injector module I1 and second injector module I2 form a first column S1. The The same applies to contact areas between the second Injector module I2 and the third injector module I3.
  • the first Column S1 is connected to a second column S2 which through contact surfaces between the nozzle clamping nut DS and the Injector modules I1, I2, I3 is formed.
  • the return bore R consists of a main bore HB and an adjacent relief well EB.
  • the main bore HB runs essentially perpendicular to the contact surfaces between the first injector module I1 and the second injector module I2.
  • the relief bore EB emerges from the side second injector module I2 and opens into the second column S2.
  • the relief bore EB is fuel that comes from the High pressure bore H in the first column S1 or in the column between the second injector module and the third injector module and from there enters the second column S2. This avoids that in the second column S2 a pressure builds up that could lead to that despite measures to seal the second gap S2 to a leak comes into the vicinity of the fuel injector.
  • a second Fuel injector provided which is like the first fuel injector a high pressure bore H ', a piston K', a Screw connection V ⁇ , an O-ring seal O ⁇ , a return hole R ', a spring F', a nozzle clamping nut DS ', a first Injector module I1 ', a second injector module I2', a third Injector module I3 ', a first column S1', a second column S2 'and a nozzle needle D'.
  • the return bore has R 'instead of a relief bore EB a relief groove EN 'on.
  • the relief groove EN ' is in the contact area of the second injector module 12 ', that of the first injector module I1 'is introduced.
  • the relief groove EN ' borders the second column S2' (see Figures 2 and 3).

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Fuel-Injection Apparatus (AREA)
EP02100373A 2001-05-03 2002-04-16 Injecteur de combustible Expired - Fee Related EP1255039B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10121531A DE10121531A1 (de) 2001-05-03 2001-05-03 Kraftstoffinjektor
DE10121531 2001-05-03

Publications (3)

Publication Number Publication Date
EP1255039A2 true EP1255039A2 (fr) 2002-11-06
EP1255039A3 EP1255039A3 (fr) 2004-05-26
EP1255039B1 EP1255039B1 (fr) 2010-08-25

Family

ID=7683501

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02100373A Expired - Fee Related EP1255039B1 (fr) 2001-05-03 2002-04-16 Injecteur de combustible

Country Status (3)

Country Link
US (1) US6719221B2 (fr)
EP (1) EP1255039B1 (fr)
DE (2) DE10121531A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003042531A1 (fr) * 2001-11-10 2003-05-22 Robert Bosch Gmbh Soupape permettant de commander le passage de liquides
EP1757802A3 (fr) * 2005-08-26 2007-03-28 Robert Bosch Gmbh Dispositif de carburant à haute pression

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011076957A1 (de) * 2011-06-06 2012-12-06 Robert Bosch Gmbh Kraftstoffeinspritzventil für Brennkraftmaschinen
DE102012208075A1 (de) * 2012-05-15 2013-11-21 Man Diesel & Turbo Se Injektor für eine Kraftstoffversorgungsanlage einer Brennkraftmaschine sowie Kraftstoffversorgungsanlage
JP6406118B2 (ja) * 2015-05-07 2018-10-17 株式会社デンソー 燃料噴射装置
DE102021202729A1 (de) 2021-03-22 2022-09-22 Robert Bosch Gesellschaft mit beschränkter Haftung Kraftstoffeinspritzeinrichtung

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000060233A1 (fr) 1999-03-31 2000-10-12 Siemens Aktiengesellschaft Soupape d'injection de carburant pour un moteur a combustion interne

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB933020A (en) * 1961-03-14 1963-07-31 Bryce Berger Ltd Improvements in or relating to nozzle holders for fuel injection equipment of internal combustion engines
US3351288A (en) * 1964-03-25 1967-11-07 Cummins Engine Co Inc Fuel injector
US4005826A (en) * 1972-06-12 1977-02-01 National Research Development Corporation Injectors for the fuel injection systems of internal combustion engines
US4280659A (en) * 1979-07-23 1981-07-28 Cummins Engine Company, Inc. Fuel injector
US4249499A (en) * 1980-01-21 1981-02-10 Cummins Engine Company, Inc. Timing mechanism for a fuel supply system
GB8310349D0 (en) * 1983-04-16 1983-05-18 Lucas Ind Plc Fuel injection nozzles
US4540122A (en) * 1983-10-26 1985-09-10 General Motors Corporation Electromagnetic unit fuel injector with pivotable armature
JPS6187963A (ja) * 1984-10-08 1986-05-06 Kanesaka Gijutsu Kenkyusho:Kk 燃料噴射装置
US5553781A (en) * 1995-01-03 1996-09-10 Servojet Products International Conversion of jerk type injector to accumulator type injector
US5806494A (en) * 1997-08-06 1998-09-15 Caterpillar Inc. Hydraulically actuated fuel injection system with integrated actuation fluid rail and injectors
LU90604B1 (en) * 2000-06-20 2001-12-21 Delphi Tech Inc Fuel injector

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000060233A1 (fr) 1999-03-31 2000-10-12 Siemens Aktiengesellschaft Soupape d'injection de carburant pour un moteur a combustion interne

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003042531A1 (fr) * 2001-11-10 2003-05-22 Robert Bosch Gmbh Soupape permettant de commander le passage de liquides
EP1757802A3 (fr) * 2005-08-26 2007-03-28 Robert Bosch Gmbh Dispositif de carburant à haute pression

Also Published As

Publication number Publication date
DE50214604D1 (de) 2010-10-07
US6719221B2 (en) 2004-04-13
DE10121531A1 (de) 2002-11-14
EP1255039B1 (fr) 2010-08-25
EP1255039A3 (fr) 2004-05-26
US20020162905A1 (en) 2002-11-07

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