EP1245826A2 - Joint d'étanchéité pour un système de carburant haute-pression d'un moteur à combustion interne - Google Patents

Joint d'étanchéité pour un système de carburant haute-pression d'un moteur à combustion interne Download PDF

Info

Publication number
EP1245826A2
EP1245826A2 EP02004834A EP02004834A EP1245826A2 EP 1245826 A2 EP1245826 A2 EP 1245826A2 EP 02004834 A EP02004834 A EP 02004834A EP 02004834 A EP02004834 A EP 02004834A EP 1245826 A2 EP1245826 A2 EP 1245826A2
Authority
EP
European Patent Office
Prior art keywords
pressure
fuel system
sealing film
pressure fuel
valve
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.)
Withdrawn
Application number
EP02004834A
Other languages
German (de)
English (en)
Other versions
EP1245826A3 (fr
Inventor
Michael Kurz
Kurt Frank
Juergen Hanneke
Marcus Haefele
Friedrich Boecking
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 EP1245826A2 publication Critical patent/EP1245826A2/fr
Publication of EP1245826A3 publication Critical patent/EP1245826A3/fr
Withdrawn legal-status Critical Current

Links

Images

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
    • F02M55/004—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
    • 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
    • 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 high-pressure fuel system for Internal combustion engines from, as it is from the published application DE 198 27 628 A1 is known.
  • a high pressure fuel system as in this document in the form of a Fuel injection valve is a valve holding body and a valve body in place by a tension nut be pressed together. Through the contact surface of the an inlet channel passes through both bodies, through which Fuel under high pressure to the injection ports of the Fuel injector arrives. To ensure the tightness of the inlet channel when passing through the contact surface of the two To ensure bodies are on one of the contact surfaces of the raised both body areas, in particular surround the passage of the inlet channel.
  • the clamping nut With the same tightening torque the clamping nut turns the surface pressure in this area increases so that there is better sealing of the inlet channel results.
  • the known high-pressure fuel system however, the disadvantage of that training such raised areas is relatively complex and therefore costly.
  • the high-pressure fuel system according to the invention with the characteristic In contrast, features of claim 1 the advantage that a between the two high pressure bodies Sealing film is arranged, the passage of the channel surrounded by the contact surface and so in a simple and inexpensive Way leads to a seal.
  • the sealing film can be designed so that they next to the inlet channel also further penetrations of channels and holes surrounds that are formed in the high-pressure fuel system are.
  • the sealing film can be manufactured separately and for example punched out of a corresponding plate be so that it is easy and inexpensive to manufacture.
  • the formation of the invention is particularly advantageous Sealing film on a fuel injector where the sealing film between a high-pressure body Valve holding body and a high-pressure body Valve body is arranged.
  • the sealing film is made of a metal.
  • This metal is preferably soft compared to steel, from which the two high pressure bodies are made.
  • Copper or soft iron has been found to be an advantageous material the sealing film proved.
  • the sealing film preferably has a thickness in the range of a few ⁇ m up to a few hundred ⁇ m. This can the sealing effect and the flow properties of the sealing film optimal when bracing the two high pressure bodies against each other be matched to the desired tightness.
  • FIG. 1 shows an exemplary embodiment of a High-pressure fuel system shown in longitudinal section.
  • the high pressure fuel system here is a fuel injection valve, which has a housing that has two high pressure bodies, a valve holding body 1 and a valve body 10 includes.
  • the valve body 10 is by means of a clamping nut 12 axially clamped against the valve holding body 1, see above that the two bodies 1.10 touch in a sealing surface 14.
  • a bore 8 is formed in the valve body 10, in which a piston-shaped valve needle 16 is longitudinally displaceable is arranged.
  • the valve needle 16 faces its combustion chamber End a valve sealing surface 25 which with a trained at the end of the bore 8 facing the combustion chamber Valve seat 23 cooperates and so on their longitudinal movement controls the opening of at least one injection opening 27, which is formed on the valve seat 23.
  • the valve needle 16 has a pressure shoulder 13 which faces the combustion chamber is directed and which is surrounded by a pressure chamber 11, by a radial expansion of the bore 8 in the valve body 10 is formed.
  • the pressure chamber 11 is one formed in the valve body 10 and in the valve holding body 1 Inlet channel 20 with one not shown in the drawing High pressure fuel source connected so that the pressure chamber 11 be filled with fuel under high pressure can.
  • valve needle 16 goes in a pressure pin 7, which in a in the valve holding body 1 designed spring chamber 3 coaxial to the valve needle 16 is arranged to be longitudinally displaceable.
  • spring chamber 3 arranged to generate a closing force on the valve needle 16, which are here in the form of a closing spring 5, which between the pressure pin 7 and the combustion chamber facing away End of the spring chamber 3 arranged under pressure is, so that the valve needle 16 by the closing spring 5 in Closing direction is applied.
  • valve piston 18 Goes away from the combustion chamber the pressure pin 7 in a valve piston 18, which in a piston bore 17 formed in valve holding body 1 is arranged to be longitudinally displaceable and by means of a the drawing, not shown, a closing force can be exerted on the valve needle 16.
  • a closing force can be exerted on the valve needle 16.
  • This closing force is caused by the valve needle 16 Pressure in the pressure chamber 11 and the associated hydraulic Force on the pressure shoulder 13 in the opening direction, i.e. from Combustion chamber away, moved or by the closing force of the valve piston 18 with the valve sealing surface 25 on the valve seat 23 pressed so that the injection openings there 27th be closed.
  • the valve holding body 1 designed as a high-pressure body lies with a contact surface 101 on the valve body 10 trained contact surface 110.
  • Figure 2 shows the area the contact surfaces of valve holding body 1 and valve body 10 in an exploded view.
  • a sealing film 35 is arranged, so is designed so that it the passages of the inlet channel 20th and centering pin bores 32 through the sealing surface 14 surrounds.
  • In the centering pin bores 32 are centering pins 30 arranged, both in the valve holding body 1 and also protrude into the valve body 10 and thus a precise alignment enable the two high pressure bodies against each other.
  • FIG. 2 shows a possible embodiment of the sealing film 35 shown.
  • the sealing film 35 comprises in that shown here Embodiment in which in the valve body 10 in addition the inlet channel 20 and the bore 8 two centering pin bores 32 are formed, three ring-shaped areas, the inlet channel 20 and the two center pin holes 32 surrounded and the one another by connecting webs 36 are connected.
  • figure 3 is an enlargement of FIG. 1 in the area of the contact surfaces, here the sealing film 35 for the sake of clarity is shown thickened. You can see that the sealing film 35 both the passage of the inlet channel 20 and the Passage of the centering pin holes 32 surrounds without in the to protrude into each passage.
  • FIG 4 is another embodiment of an inventive Sealing film 35 shown.
  • the one shown here Valve body 10 has only one centering pin bore 32 and next to it only the bore 8 and the inlet channel 20. Since here the inlet channel 20 and the centering pin bore 32 have the same diameter and each other with respect to the Opposite the center of the circular contact surface 110, can the sealing film 35 designed mirror-symmetrical be so that when assembling the fuel injector not be installed in the wrong way can.
  • the contact surface 110 of the valve body 10 is one Recess 37 formed, in which the sealing film 35 is inserted is.
  • the recess 37 is formed such that the sealing film 35 is not laterally on the contact surface 110 can slip.
  • the recess 37 is not so deep that the sealing film 35 is completely immersed in it so that it is raised relative to the contact surface 110.
  • the fuel injection valve comes into contact surface 101 of the valve holding body 1 on the sealing film 35 for contact and not on the contact surface 110.
  • the sealing film 35 can be made from various materials his. For example, Steel which is a larger or may have a lower hardness than the steel from which the high pressure bodies are made. Furthermore, it can be provided, the sealing film 35 from a compared to Steel to produce soft metal, for example from copper or soft iron. Such a soft metal allows that the material flows when the clamping nut is tightened, so that minor bumps on the contact surfaces or dirt particles do not affect the tightness.
  • the thickness of the Sealing film 35 can meet the corresponding requirements of Fuel injector or other high pressure fuel system be adjusted. It can only be a few ⁇ m or a few tenths of a millimeter, preferably the sealing film 35 has a thickness of 5 to 500 microns.
  • the hardness of the material and the tightening torque of the nut is more or less strong flow of the sealing film 35 between the two High pressure bodies. Care must be taken here that the material of the sealing film 35 is not in the inlet channel 20 flows in and there to a narrowing of the flow cross section leads. In addition, it can also be provided that To produce sealing film 35 from a plastic, the Fuel is not dissolved and its softness ensures a good seal with low contact pressure.
  • Sealing film 35 can also be provided, depending on the number the passage of channels or holes through the contact surfaces the high pressure body of the sealing film 35 other shapes to give. However, it must always be ensured that the Sealing film 35 the channels in the area of the passage in the form of an annular disk surrounds, so that there is always a good seal results.
  • Example of a high pressure fuel system in the form of a Fuel injection valve can be a sealing film according to the invention also provided in other high-pressure fuel systems be in which the passage of a high-pressure fuel channel sealed by the contact surfaces of two high pressure bodies shall be. Examples of such high pressure fuel systems are high-pressure fuel pumps, line seals or pump-nozzle units and any connections of high pressure lines on high pressure bodies.
  • the sealing film 35 is not a separate one To produce a part, but as a molding directly onto a Apply contact surface of a high pressure body. This can happen, for example, that a corresponding Layer electrolytically, galvanically or with a phototechnical Process is applied to the contact surface, so that the passages of the high pressure channels and the other holes are surrounded by a raised surface.
EP02004834A 2001-03-28 2002-03-02 Joint d'étanchéité pour un système de carburant haute-pression d'un moteur à combustion interne Withdrawn EP1245826A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10115214A DE10115214A1 (de) 2001-03-28 2001-03-28 Kraftstoffhochdrucksystem für Brennkraftmaschinen
DE10115214 2001-03-28

Publications (2)

Publication Number Publication Date
EP1245826A2 true EP1245826A2 (fr) 2002-10-02
EP1245826A3 EP1245826A3 (fr) 2004-02-04

Family

ID=7679338

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02004834A Withdrawn EP1245826A3 (fr) 2001-03-28 2002-03-02 Joint d'étanchéité pour un système de carburant haute-pression d'un moteur à combustion interne

Country Status (4)

Country Link
US (1) US6575142B2 (fr)
EP (1) EP1245826A3 (fr)
JP (1) JP2002357171A (fr)
DE (1) DE10115214A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1741923A1 (fr) * 2005-07-08 2007-01-10 C.R.F. Societa Consortile per Azioni Système de connexion pour une rampe tubulaire pour fluides à haute pression et système pour réduire a taille d'une rampe
WO2007071481A1 (fr) * 2005-12-19 2007-06-28 Robert Bosch Gmbh Connexion haute pression et procede pour creer une connexion haute pression
DE102015202877A1 (de) 2015-02-18 2016-08-18 Robert Bosch Gmbh Kraftstoffhochdrucksystem für Brennkraftmaschinen
EP3098434A1 (fr) * 2015-05-29 2016-11-30 Robert Bosch Gmbh Systeme d'injection de carburant

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005054522A1 (fr) * 2003-12-05 2005-06-16 Siemens Aktiengesellschaft Procede pour le durcissement selectif de surfaces d'etancheite
DE102004024389A1 (de) * 2004-05-17 2005-12-15 Siemens Ag Einspritzventil für Brennkraftmaschinen
DE102005015425A1 (de) * 2005-04-04 2006-10-05 Siemens Ag Einspritzventil
DE102005025953A1 (de) * 2005-06-06 2006-12-07 Siemens Ag Einspritzventil und Ausgleichselement für ein Einspritzventil
JP4420102B2 (ja) * 2007-10-30 2010-02-24 株式会社デンソー インジェクタ
DE102008007225A1 (de) 2008-02-01 2009-08-06 Robert Bosch Gmbh Zwischenplatte für einen Kraftstoffinjektor sowie Kraftstoffinjektor
DE102011008468A1 (de) 2011-01-13 2012-07-19 Continental Automotive Gmbh Kraftstoffinjektor und Verfahren zum Herstellen eines Kraftstoffinjektors
DE102011086905A1 (de) 2011-11-23 2013-05-23 Robert Bosch Gmbh Hochdruckbauteilesystem, insbesondere Kraftstoffhochdrucksystem einer Brennkraftmaschine
DE102014201854A1 (de) 2014-02-03 2015-08-06 Robert Bosch Gmbh Dichtscheibe für einen Kraftstoffinjektor, sowie Kraftstoffinjektor mit einer derartigen Dichtscheibe

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5785024A (en) * 1996-08-22 1998-07-28 Mitsubishi Jidosha Kogyo Kabushiki Kaisha Cylinder head device for internal combustion engine
DE19729788A1 (de) * 1997-07-11 1999-01-14 Bosch Gmbh Robert Radialkolbenpumpe zur Kraftstoffhochdruckversorgung
EP0957262A2 (fr) * 1998-05-13 1999-11-17 LUCAS INDUSTRIES public limited company Injecteur de combustible
DE19827628A1 (de) * 1998-06-20 1999-12-23 Daimler Chrysler Ag Kraftstoffeinspritzventil für Brennkraftmaschinen
DE10103250A1 (de) * 2000-01-26 2001-08-09 Usui Kokusai Sangyo Kk Gemeinsame Leitung für Dieselmotor

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2458728A1 (de) * 1974-12-12 1976-06-24 Bosch Gmbh Robert Elektromagnetisch betaetigbares einspritzventil
US5247918A (en) * 1992-09-17 1993-09-28 Siemens Automotive L.P. Sealing a direct injection fuel injector to a combustion chamber
US6062497A (en) * 1996-01-19 2000-05-16 Caterpillar Inc. Fuel injector nozzle assembly with improved needle check valve stop mechanism
US6116522A (en) * 1996-04-16 2000-09-12 Motorenfabrik Hatz Gmbh & Co. Kg Fuel injection device
DE19752496A1 (de) * 1997-11-27 1999-06-02 Bosch Gmbh Robert Kraftstoffeinspritzventil für Brennkraftmaschinen
US6354520B1 (en) * 1998-05-07 2002-03-12 Siemens Aktiengesellschaft Fuel injection valve for internal combustion engines

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5785024A (en) * 1996-08-22 1998-07-28 Mitsubishi Jidosha Kogyo Kabushiki Kaisha Cylinder head device for internal combustion engine
DE19729788A1 (de) * 1997-07-11 1999-01-14 Bosch Gmbh Robert Radialkolbenpumpe zur Kraftstoffhochdruckversorgung
EP0957262A2 (fr) * 1998-05-13 1999-11-17 LUCAS INDUSTRIES public limited company Injecteur de combustible
DE19827628A1 (de) * 1998-06-20 1999-12-23 Daimler Chrysler Ag Kraftstoffeinspritzventil für Brennkraftmaschinen
DE10103250A1 (de) * 2000-01-26 2001-08-09 Usui Kokusai Sangyo Kk Gemeinsame Leitung für Dieselmotor

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1741923A1 (fr) * 2005-07-08 2007-01-10 C.R.F. Societa Consortile per Azioni Système de connexion pour une rampe tubulaire pour fluides à haute pression et système pour réduire a taille d'une rampe
US7305969B2 (en) 2005-07-08 2007-12-11 C.R.F. Societa Consortile Per Azioni Connection system for a tubular rail for high-pressure fluid and a system for reducing the size of the rail
WO2007071481A1 (fr) * 2005-12-19 2007-06-28 Robert Bosch Gmbh Connexion haute pression et procede pour creer une connexion haute pression
DE102015202877A1 (de) 2015-02-18 2016-08-18 Robert Bosch Gmbh Kraftstoffhochdrucksystem für Brennkraftmaschinen
WO2016131512A1 (fr) * 2015-02-18 2016-08-25 Robert Bosch Gmbh Système à haute pression de carburant pour moteurs à combustion interne
EP3098434A1 (fr) * 2015-05-29 2016-11-30 Robert Bosch Gmbh Systeme d'injection de carburant

Also Published As

Publication number Publication date
US6575142B2 (en) 2003-06-10
JP2002357171A (ja) 2002-12-13
US20020139869A1 (en) 2002-10-03
DE10115214A1 (de) 2002-10-10
EP1245826A3 (fr) 2004-02-04

Similar Documents

Publication Publication Date Title
DE19600403C2 (de) Befestigungsanordnung für ein elektromagnetisches Brennstoff-Einspritzventil
EP1567765B1 (fr) Soupape d'injection
WO2007068518A1 (fr) Injecteur de carburant dote d'un organe de soupape d'injection a actionnement direct
EP1245826A2 (fr) Joint d'étanchéité pour un système de carburant haute-pression d'un moteur à combustion interne
DE102008031271B4 (de) Düsenbaugruppe für ein Einspritzventil
EP0976924A2 (fr) Servovalve pour un injecteur et injecteur
EP2816219B1 (fr) Soupape de contrôle pour un injecteur de carburant
WO2006084843A1 (fr) Procede de fabrication d'un corps de buse et corps de buse
EP1373714B1 (fr) Soupape d'injection
DE102008035087B4 (de) Einspritzventil
DE10102233A1 (de) Kraftstoffhochdrucksystem für Brennkraftmaschinen
EP1404965A1 (fr) Soupape de commande de liquides
DE10209116A1 (de) Verfahren zur Herstellung eines Kraftstoffeinspritzventils
DE102017205731A1 (de) Kraftstoffhochdruckpumpe
DE102015220012B4 (de) Verfahren zur Herstellung eines zweiteiligen Düsenkörpers und zweiteiliger Düsenkörper
EP1148234B1 (fr) Injecteur de carburant avec surfaces d'étanchéité optimisées
WO2004005704A1 (fr) Procede de fabrication d'un module dote d'un insert mobile pour une soupape d'injection et soupape d'injection associee
DE102019218949A1 (de) Komponente für eine Einspritzanlage, insbesondere Brennstoffverteilerleiste, und Einspritzanlage mit solch einer Komponente
DE10318989A1 (de) Kraftstoffeinspritzventil für Brennkraftmaschinen
WO2006048371A1 (fr) Dispositif d'injection de carburant pour moteur a combustion interne
DE10353683A1 (de) Kraftstoffeinspritzventil für Brennkraftmaschinen
EP1709321A1 (fr) Soupape d'injection de carburant pour moteurs a combustion interne
DE102010062077A1 (de) Ventileinrichtung mit einem wenigstens abschnittsweise zylindrischen Bewegungselement
WO2000039447A1 (fr) Etranglement pour systemes d'injection diesel
WO2016131512A1 (fr) Système à haute pression de carburant pour moteurs à combustion interne

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR

AX Request for extension of the european patent

Free format text: AL;LT;LV;MK;RO;SI

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR

AX Request for extension of the european patent

Extension state: AL LT LV MK RO SI

17P Request for examination filed

Effective date: 20040804

AKX Designation fees paid

Designated state(s): DE FR GB

17Q First examination report despatched

Effective date: 20050103

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20050515