WO2006048371A1 - Dispositif d'injection de carburant pour moteur a combustion interne - Google Patents

Dispositif d'injection de carburant pour moteur a combustion interne Download PDF

Info

Publication number
WO2006048371A1
WO2006048371A1 PCT/EP2005/055260 EP2005055260W WO2006048371A1 WO 2006048371 A1 WO2006048371 A1 WO 2006048371A1 EP 2005055260 W EP2005055260 W EP 2005055260W WO 2006048371 A1 WO2006048371 A1 WO 2006048371A1
Authority
WO
WIPO (PCT)
Prior art keywords
fuel
injection device
fuel injection
central region
sealing disc
Prior art date
Application number
PCT/EP2005/055260
Other languages
German (de)
English (en)
Inventor
Juergen Hanneke
Andreas Wengert
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 WO2006048371A1 publication Critical patent/WO2006048371A1/fr

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
    • F02M47/00—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure
    • F02M47/02—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure of accumulator-injector type, i.e. having fuel pressure of accumulator tending to open, and fuel pressure in other chamber tending to close, injection valves and having means for periodically releasing that closing pressure
    • F02M47/027—Electrically actuated valves draining the chamber to release the closing pressure
    • 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

Definitions

  • the invention relates to a fuel injection device for an internal combustion engine according to the preamble of claim 1.
  • Such a fuel injection device is known from DE 100 38 996 A.
  • This fuel injection device has a fuel injector with an injector body, with which a connecting piece for a high-pressure fuel line is connected. Through the connecting piece and the injector flows under high pressure fuel. Between the connection piece and the injector body is a
  • Sealing disc arranged, which has in its central region an opening for the passage of the fuel and which is clamped with its edge region between the connecting piece and the injector body.
  • Fuel flow is impeded.
  • it can lead to material separation, for example in the form of chips in the strong deformation of the gasket, which then in the Get fuel injector and affect its function or damage it.
  • the fuel injection device with the features according to claim 1 has the advantage that the sealing disc is less strongly deformed radially, since this has a greater rigidity, so that there is no material separations.
  • a radial deformation takes place substantially in the edge region of the sealing disc, while in the central region a deformation in the axial direction is made possible, so that the size of the openings in the central region of the sealing disc is not reduced and the fuel flow is not hindered.
  • the embodiment according to claim 2 allows a branching of the fuel flow in at least one of the components, wherein it is ensured that the fuel flow through both flow channels through the sealing disc is not hindered.
  • FIG. 1 shows a
  • FIG. 2 shows an enlarged view of a designated in Figure 1 with II section of a fuel injector
  • FIG. 3 shows a gasket of the fuel injector in a cross section along line III-III in Figure 2 and Figure 4 shows the detail II of the injector according to a second embodiment.
  • FIG. 1 shows a fuel injection device for an internal combustion engine of a motor vehicle.
  • the internal combustion engine is preferably a self-igniting internal combustion engine and has a plurality of cylinders.
  • the fuel injection device has a feed pump 10, is conveyed by the fuel from a reservoir 12 to a high-pressure pump 14.
  • fuel is conveyed under high pressure in a high-pressure accumulator 16.
  • injectors 20 are connected via high pressure lines.
  • Each injector 20 has a control valve 22, by means of which a likewise a part of the injector 20 forming fuel injection valve 24 can be opened to a fuel injection or can be closed to complete a fuel injection.
  • the control valves 22 of the injectors 20 are connected to an electronic control device 26 and are driven by them depending on operating parameters of the internal combustion engine.
  • the injector 20 has a multipart injector body 28 in which the fuel injection valve 24 is arranged at its end region facing the combustion chamber of the cylinder.
  • the fuel injection valve 24 has at least one injection valve member 30, which is guided displaceably in a bore 32.
  • the injection valve member 30 at least one, preferably a plurality of distributed over the circumference of the injector 20 arranged injection openings 34 controlled at the projecting into the combustion chamber end of the injector body 28.
  • the injection valve member 30 has at its end region facing the combustion chamber, for example, an approximately conical sealing surface 36, which with a in
  • Injector body 28 cooperates in its combustion chamber facing the end region formed approximately conical valve seat 38, from or after which discharge the injection openings 34.
  • an annular space 40 is present between the injection valve member 30 and the bore 32 toward the valve seat 38, which merges in its end region remote from the valve seat 38 by a radial widening of the bore 32 into a pressure chamber 42 surrounding the injection valve member 30.
  • the injection valve member 30 has at the level of the pressure chamber 42 by a cross-sectional reduction to its sealing surface 36 toward a pressure shoulder 44.
  • a prestressed closing spring 46 At the end remote from the combustion chamber of the injection valve member 30 engages a prestressed closing spring 46, through which the injection valve member 30 is pressed with its sealing surface 36 to the valve seat 38.
  • a control chamber 48 is formed in the injector body 28, which is delimited by the injection valve member 30 or a control piston 50 connected thereto, a force being generated in the closing direction on the injection valve member 30 by the pressure prevailing in the control chamber 48.
  • the high pressure line 18 is connected to the injector body 28 and within the injector body 28 leads an inlet bore 52 to the pressure chamber 42.
  • the control chamber 48 is also connected via a connecting bore 53 to the high pressure line 18 and also has a controlled by the control valve 22 connection 54 with a discharge area which is, for example, a return to the reservoir 12.
  • connection 54 of the control chamber 48 with the Relief area is closed, so prevails in the control chamber 48 high pressure as in the pressure chamber 42, so that the injection valve member 30 remains in its closed position and no fuel injection takes place.
  • the control valve 22 may include an electromagnetic actuator or a piezoelectric actuator.
  • the injector 20 is shown partially enlarged in accordance with a first exemplary embodiment, wherein in particular the connection of the fuel line 18 can be seen.
  • a hollow cylindrical projection 60 is provided, which is provided with an internal thread.
  • a connecting piece 62 is screwed for the high pressure line 18, wherein in the connecting piece 62, a flow channel 63 extends.
  • the inlet bore 52 to the pressure chamber 42 and the connecting bore 53 to the control chamber 48 open separately from each other at the base 61 of the projection 60 of the injector body 28 and thus form separate flow channels.
  • the sealing disc 64 is shown in Figures 2 and 3 according to a first embodiment.
  • the sealing disk 64 has a closed edge region 66, which surrounds a central region 68, in which a plurality of openings 70 are introduced.
  • the voltage applied to the edge region 66 of the sealing washer 64 end face of the connecting piece 62 is formed at least substantially flat.
  • the base 61 of the projection 60 is at least in formed essentially flat, the mouths of the inlet bore 52 and the connecting hole 53 may be, for example, flared conically.
  • the thickness D of the edge region 66 of the sealing disk 64 is greater than the thickness d of the central region 68.
  • the edge region 66 of the sealing disk 64 is raised in relation to its central region 68.
  • the central region 68 of the sealing disk 64 is arranged at an axial distance from the base 61 of the projection 60 of the injector body 28.
  • the transition between the edge region 66 and the central region 68 of the sealing disc 64 may be formed, for example, as shown in Figure 2 at least approximately conical or rounded, for example.
  • the number of openings 70, their arrangement, their cross-sections and the sum of the cross-sections of the openings 70 are determined such that a predetermined volume flow of fuel can flow through them, as is required for the function of the fuel injector. Through the openings 70 and a targeted throttling of the fuel flow can be achieved.
  • the openings 70 may be introduced as bores in the central region 68 of the sealing disc 64 and thus have a round cross-section. Alternatively, the openings 70 may also have a non-circular cross-section and be introduced into the central area 68, for example by punching or otherwise.
  • the sealing disc 64 consists of a material with respect to the material of the injector body 28 and the connecting piece 62, which are preferably made of steel, lower hardness, such as soft iron, copper or brass.
  • the connecting piece 62 When screwing the connecting piece 62 into the projection 60 of the injector body 28 of the edge portion 66 of the sealing washer 64 is elastically and / or plastically deformed, so that the required seal between the injector body 28 and the connecting piece 62nd is reached.
  • the central region 68 of the sealing disk 64 is by the distance from the base 61 of the projection 60, a deformation in the direction of the longitudinal axis 65 of the
  • Connecting piece 62 allows, so that while the openings 70 are not deformed, the required
  • the injector 20 is shown in fragmentary accordance with a second embodiment, in which the basic structure is the same as in the first embodiment, but the sealing disc 164 and the injector body 28 are modified.
  • the sealing disk 164 has the edge region 166 and the central region 168 with the openings 170, wherein the sealing disk 164 has an at least approximately constant thickness, so that the two end faces are at least substantially planar.
  • a recess 172 opposite the central region 168 of the sealing disk 164 is introduced, in which the inlet bore 52 and the connecting bore 53 in the injector body 28 open.
  • an axial distance between the base 161 of the projection 160 and the central portion 68 of the sealing washer 64 is provided, which allows deformation of the central portion 168 of the sealing disc 164 in the direction of the longitudinal axis 65 of the connecting piece 62, so that thereby the openings 170 are not deformed, the required fürströmquerroughe the openings 170 are maintained and the fuel flow is not hindered.
  • leading fuel line 18 may also be on the injector body 28 a
  • Relief fuel line 90 to be connected, by the fuel with the control valve open 22 from the control chamber 48 controlled fuel at least indirectly in the Reservoir 12 is derived.
  • 28 electrical lines 92 are connected to the injector body for contacting the electrical actuator of the control valve 22nd
  • sealing disk 64, 164 described above for use with an injector 20 can also be used with other components of a fuel injection device which are connected to one another with the interposition of the sealing disk.

Landscapes

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

Abstract

La présente invention concerne un dispositif d'injection de carburant présentant au moins deux pièces (28,62) grâce auxquelles du carburant haute pression traverse respectivement au moins un canal de circulation (52,53;63), et qui sont reliées entre elles avec intercalage d'un disque d'étanchéité (64). Le disque d'étanchéité (64) présente dans sa partie centrale (68) au moins une ouverture (70) destinée à être traversée par le carburant, et est enserré au niveau de sa partie marginale (66) qui entoure sa partie centrale (68), entre les deux pièces (28,62). Le disque d'étanchéité (64) présente dans sa partie centrale (68) plusieurs ouvertures (70), et au moins sur un côté du disque d'étanchéité (64), sa partie centrale (68) est séparée axialement du côté (61) de la pièce adjacente (28,62).
PCT/EP2005/055260 2004-11-04 2005-10-14 Dispositif d'injection de carburant pour moteur a combustion interne WO2006048371A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200410053275 DE102004053275A1 (de) 2004-11-04 2004-11-04 Kraftstoffeinspritzeinrichtung für eine Brennkraftmaschine
DE102004053275.3 2004-11-04

Publications (1)

Publication Number Publication Date
WO2006048371A1 true WO2006048371A1 (fr) 2006-05-11

Family

ID=35500886

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2005/055260 WO2006048371A1 (fr) 2004-11-04 2005-10-14 Dispositif d'injection de carburant pour moteur a combustion interne

Country Status (2)

Country Link
DE (1) DE102004053275A1 (fr)
WO (1) WO2006048371A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT511716B1 (de) * 2011-12-09 2013-02-15 Bosch Gmbh Robert Verbindung von hochdruckmedium führenden komponenten einer einspritzvorrichtung für brennkraftmaschinen

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0372712A1 (fr) * 1988-12-02 1990-06-13 Lucas Industries Public Limited Company Soupape électromagnétique
DE10038996A1 (de) 2000-08-10 2002-02-21 Bosch Gmbh Robert Kraftstoffeinspritzventil
US20040021012A1 (en) * 2001-02-06 2004-02-05 Gunter Lewentz Seal between elements of a fuel-injection nozzle for an internal combustion engine
DE10250728A1 (de) * 2002-10-31 2004-05-19 Robert Bosch Gmbh Filtereinrichtung für ein Ventil zum Steuern von Flüssigkeiten

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0372712A1 (fr) * 1988-12-02 1990-06-13 Lucas Industries Public Limited Company Soupape électromagnétique
DE10038996A1 (de) 2000-08-10 2002-02-21 Bosch Gmbh Robert Kraftstoffeinspritzventil
US20040021012A1 (en) * 2001-02-06 2004-02-05 Gunter Lewentz Seal between elements of a fuel-injection nozzle for an internal combustion engine
DE10250728A1 (de) * 2002-10-31 2004-05-19 Robert Bosch Gmbh Filtereinrichtung für ein Ventil zum Steuern von Flüssigkeiten

Also Published As

Publication number Publication date
DE102004053275A1 (de) 2006-05-11

Similar Documents

Publication Publication Date Title
EP2235354B1 (fr) Injecteur de carburant dont l'élément soupape de commande présente une zone d'appui
WO2007068518A1 (fr) Injecteur de carburant dote d'un organe de soupape d'injection a actionnement direct
EP0976924B1 (fr) Injecteur avec une servovalve
DE10211439A1 (de) Kraftstoffeinspritzeinrichtung für eine Brennkraftmaschine
EP1245826A2 (fr) Joint d'étanchéité pour un système de carburant haute-pression d'un moteur à combustion interne
WO2010009932A1 (fr) Injecteur de combustible
WO2009153087A1 (fr) Injecteur de carburant
EP1373714B1 (fr) Soupape d'injection
EP1797314B1 (fr) Injecteur pour injecter du carburant sur un moteur a combustion interne
EP1574701A1 (fr) Injecteur de common rail
WO2001011219A1 (fr) Injecteur a rampe commune
WO2005108773A1 (fr) Soupape d'injection de carburant destinee a des moteurs a combustion interne
EP1402174A1 (fr) Dispositif d'injection de carburant pour moteur a combustion interne
WO2001031191A2 (fr) Soupape d'injection de carburant pour moteurs a combustion interne
WO2006048371A1 (fr) Dispositif d'injection de carburant pour moteur a combustion interne
EP1671028A1 (fr) Soupape pour commander une liaison dans un systeme de liquide haute pression, notamment un dispositif d'injection de carburant pour un moteur a combustion interne
DE10307873A1 (de) Sackloch- und Sitzloch-Einspritzdüse für eine Brennkraftmaschine mit einem Übergangskegel zwischen Sackloch und Düsennadelsitz
EP1759115A1 (fr) Pompe a haute pression pour un dispositif d'injection de carburant d'un moteur a combustion interne
DE10050599B4 (de) Einspritzventil mit einem Pumpkolben
WO2017097498A1 (fr) Soupape d'admission à commande électromagnétique et pompe haute pression munie d'une soupape d'admission
DE102004046886A1 (de) Kraftstoffeinspritzventil für eine Brennkraftmaschine
DE102020213356A1 (de) Brennstoffeinspritzventil
WO2022083936A1 (fr) Vanne d'injection de carburant
EP1284360A2 (fr) Dispositif d'injection de carburant pour moteur à combustion interne
WO2005031154A1 (fr) Element pour dispositif d'injection de carburant de moteur a combustion interne et dispositif d'injection de carburant

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): AE AG AL AM AT AU AZ BA BB BG BR BW BY BZ CA CH CN CO CR CU CZ DK DM DZ EC EE EG ES FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KM KP KR KZ LC LK LR LS LT LU LV LY MA MD MG MK MN MW MX MZ NA NG NI NO NZ OM PG PH PL PT RO RU SC SD SE SG SK SL SM SY TJ TM TN TR TT TZ UA UG US UZ VC VN YU ZA ZM ZW

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): BW GH GM KE LS MW MZ NA SD SL SZ TZ UG ZM ZW AM AZ BY KG KZ MD RU TJ TM AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LT LU LV MC NL PL PT RO SE SI SK TR BF BJ CF CG CI CM GA GN GQ GW ML MR NE SN TD TG

121 Ep: the epo has been informed by wipo that ep was designated in this application
122 Ep: pct application non-entry in european phase

Ref document number: 05791988

Country of ref document: EP

Kind code of ref document: A1