EP1828593A1 - Soupape d'injection de carburant pour moteur a combustion interne - Google Patents

Soupape d'injection de carburant pour moteur a combustion interne

Info

Publication number
EP1828593A1
EP1828593A1 EP05808003A EP05808003A EP1828593A1 EP 1828593 A1 EP1828593 A1 EP 1828593A1 EP 05808003 A EP05808003 A EP 05808003A EP 05808003 A EP05808003 A EP 05808003A EP 1828593 A1 EP1828593 A1 EP 1828593A1
Authority
EP
European Patent Office
Prior art keywords
valve
throttle
fuel injection
guide sleeve
valve member
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Withdrawn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
EP05808003A
Other languages
German (de)
English (en)
Inventor
Rudolf Heinz
Patrick Mattes
Wolfgang Stoecklein
Holger Rapp
Marcus Schilling
Violaine Chassagnoux
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 EP1828593A1 publication Critical patent/EP1828593A1/fr
Withdrawn legal-status Critical Current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
    • F02M45/00—Fuel-injection apparatus characterised by having a cyclic delivery of specific time/pressure or time/quantity relationship
    • F02M45/12—Fuel-injection apparatus characterised by having a cyclic delivery of specific time/pressure or time/quantity relationship providing a continuous cyclic delivery with variable 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
    • F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/04—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00 having valves, e.g. having a plurality of valves in series
    • F02M61/042—The valves being provided with fuel passages
    • 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
    • F02M61/04—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00 having valves, e.g. having a plurality of valves in series
    • F02M61/10—Other injectors with elongated valve bodies, i.e. of needle-valve type
    • F02M61/12—Other injectors with elongated valve bodies, i.e. of needle-valve type characterised by the provision of guiding or centring means for valve bodies
    • 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
    • F02M2200/28—Details of throttles in fuel-injection apparatus
    • 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
    • F02M2547/00—Special features for fuel-injection valves actuated by fluid pressure
    • F02M2547/001—Control chambers formed by movable sleeves

Definitions

  • the invention is based on a fuel injection valve according to the preamble of patent claim 1.
  • Such a fuel injection valve has become known, for example, from US 4,987,887.
  • a guide throttling of the fuel in the Injection made including in particular two throttle connections can be used with different throttle resistance, which are arranged in parallel.
  • the first throttle connection permanently connects an annular gap with an annular space opening onto the valve seat surface, the second throttle connection is switched on from a predetermined opening stroke.
  • the fuel injection valve according to the invention for internal combustion engines with the characterizing feature of claim 1 has the opposite advantage that the guide throttling can be done in a particularly simple manner by forming the guide portion as a guide sleeve.
  • the second throttle connection is completely or almost completely closed.
  • the pressure at the valve seat surface is lowered relative to the rail pressure prevailing in front of the first throttle connection, and the hydraulically effective area at which the rail pressure acts to form a hydraulic opening force on the valve member is reduced.
  • the latter causes a lowering of the opening speed of the valve member below the predetermined opening stroke. If the predetermined opening stroke is exceeded, the second throttle connection is switched on and the rail pressure now prevails to the valve seat surface.
  • the hydraulically effective surface as well as the pressure at the
  • Injection openings are now formed as in known common rail nozzles. In addition, if necessary, can be dispensed with a conventional guidance of the valve member.
  • the first throttle connection with greater throttle resistance may be formed by an annular gap between the guide sleeve and valve member, a mecanicnanschliff the valve member or a throttle bore in the guide sleeve or the valve member.
  • the second throttle connection can by anotherinstitunanschliff of Valve member or a throttle bore in the valve member or the guide sleeve are produced.
  • Embodiments of the fuel injection valve according to the invention are shown in the non-scale drawing and are explained in more detail in the following description. It shows:
  • Fig. 1 is a schematic representation of a first
  • Fig. 2 shows a detail of the combustion chamber end of the
  • Fig. 3 shows a detail of the combustion chamber side end of a second
  • Fig. 4 shows a detail of the combustion chamber side end of a third
  • Fig. 5 shows a detail of the combustion chamber side end of a fourth
  • Embodiment of the fuel injection valve according to the invention with a throttle bore in the guide sleeve Embodiment of the fuel injection valve according to the invention with a throttle bore in the guide sleeve
  • Fig. 6 shows a detail of the combustion chamber end of a fifth embodiment of the fuel injection valve according to the invention with two throttle bores in the guide sleeve, and
  • Fig. 7 in a first partial image (a) the throttle resistance and in a second partial image (b) the injection quantity of the fuel injection valve according to the invention in dependence on the opening stroke.
  • Fig. 1 shows a fuel injection valve 1 for internal combustion engines, which is designed as a nozzle module, as it u. a. used in CR injectors with piezo actuator.
  • the fuel injection valve 1 has a valve body 2, in which a bore 3 is provided.
  • a valve member 4 is axially slidably mounted in the bore 3 and is guided by means of a guide sleeve serving as a guide portion 5 in the interior of the bore 3.
  • Fig. 2 shows the combustion chamber end of the fuel injection valve 1 in detail.
  • the valve member 4 has at its combustion chamber end a valve sealing surface 6, with which it rests in the closed state of the fuel injection valve 1 on a valve seat surface 7 of the valve body 2 to prevent fuel flow to the valve seat surface 7 provided downstream injection openings 8.
  • the injection openings 8 open into the combustion chamber of the internal combustion engine to be supplied.
  • the guide sleeve 5 is axially between one a not shown high-pressure fuel line connected annular gap 9 and an opening to the valve seat surface 7 annular space 10 is provided.
  • the guide sleeve 5 has in the direction of the combustion chamber end of the valve body 2 towards a conical surface portion 11 which in a tapered
  • a spring 23 is provided, which presses in the axial direction against a radially extending control edge 15 of the guide sleeve 5 and the control sleeve 5 fixed immovably.
  • valve member 4 closes with the inner wall of the guide sleeve 5 hydraulically tight.
  • valve member 4 Serving as a throttle connection, not pictorially illustrated first, longmonynanschliff the valve member 4 connects the annular gap 9 permanently with the annulus 10.
  • Throttle connection connects the annular gap 9 and the annular space 10 from a predetermined opening stroke h of the valve member 4, which in the present case is about 0.1 mm. Upon reaching the opening stroke h, the valve member 4 is tightened so far that the secondmonynanschliff 14 with one end on the control edge 15 of
  • Guide sleeve 5 protrudes into the annular gap 9 and allows the supply of fuel into the injection openings 8 with a smaller throttle resistance.
  • Fig. 3 shows a detail of a second embodiment of the fuel injection valve 1, in which between the valve member 4 and the
  • annular gap 16 is formed, which connects the first annular gap 9 with the annular space 10 permanently as the first throttle connection.
  • the annular space 10 opens to the valve seat surface 7 and is between the valve member 4 and the guide sleeve 5 by a Reduction of the diameter of the valve member 4 is formed.
  • a throttle bore 17 is drilled in the valve member 4 and connects the axial portion of the valve member 4 of larger diameter, on which the annular gap 16 is formed, with the portion of the valve member of smaller diameter, on which the annular space 10 is formed.
  • the throttle bore 17 connects from the opening stroke h the annular gap 9 with the annular space 10, so that the supply of fuel into the injection openings 8 is made possible with a smaller throttle resistance.
  • FIG. 4 shows a detail of a third embodiment of the fuel injection valve 1, in which, in contrast to FIG. 3, the larger-diameter portion of the valve member 4 terminates hydraulically tightly with the guide sleeve 5.
  • the throttle bore 17 of the valve member 4 connects the annular gap 9 with the on
  • Valve member 4 formed administratnanschliff 14, which is formed as shown in FIG. 1 and is in communication with the annular space 10. From reaching the opening stroke h, the control edge 15 releases the surface grinding 14, so that it is connected directly to the annular gap 9.
  • Fig. 5 shows a detail of a fourth embodiment of the fuel injection valve 1, in which a throttle bore 13 is drilled in the guide sleeve 5 as a second throttle connection.
  • the throttle bore 13 connects the inner surface of the guide sleeve 5 permanently with the control edge 15 of the guide sleeve 5.
  • the valve member 4 of the fuel injection valve 1 of Fig. 5 is constructed analogously to the valve member 4 of Fig. 3, but has no throttle bore.
  • an annular gap 16 between the guide sleeve 5 and a portion of the valve member 4 is formed with a larger diameter, in which the
  • Throttle bore 13 opens when the fuel injection valve 1 is closed. From the opening stroke h, the throttle bore 13 no longer opens into the annular gap 16, but into the annular gap 10, which between the portion of the valve member 4 with a smaller diameter and the Guide sleeve 5 is formed.
  • FIG. 6 shows a further embodiment of the fuel injection valve 1 with a guide sleeve 5, which is extended in the axial direction in comparison with the guide sleeves shown in FIGS
  • the guide sleeve 5 has two cylindrical sections with different inner diameters, of which the larger facing away from the combustion chamber, the smaller facing the combustion chamber end of the guide sleeve 5 is formed.
  • the two sections of the guide sleeve 5 adjoin one another at a control edge 15, which is formed in the radial direction between the cylindrical sections.
  • the valve member 4 has three sections with different diameters, which faces away from the combustion chamber end to the
  • the sections with the largest and the mean diameter of the valve member 4 are formed such that they each close with a closed fuel injection valve 1 hydraulically sealed with the inner diameters of the guide sleeve 5.
  • Valve member 5 with the smallest diameter forms the annulus 10 with the combustion chamber side portion of the guide sleeve. Between the section with the average diameter of the valve member 4 and the portion of the guide sleeve 5, which faces away from the combustion chamber, an annular space 26 is formed.
  • the guide sleeve 5 has at a combustion chamber end two first, extending in the radial direction first throttle bores 25, which act as a first throttle connections.
  • the first throttle bores 25 extend between the outer wall and the inner wall of the
  • the annular gap 9 is connected via the first throttle bores 25 with the annular space 10.
  • throttle bores 24 in the Guide sleeve 5 are in the axial direction further away from the combustion chamber than the first throttle bores 25 are mounted and serve as second throttle connections.
  • the second orifices 24 connect the annular gap 9 to the annular space 26.
  • the annular space 26 is hydraulically sealed until the nozzle stroke h against the annulus 10 is reached, because the portion of the middle diameter valve member 4 is hydraulically sealed to the combustion chamber side portion of the guide sleeve 5 concludes.
  • the control edge 15 Upon reaching the nozzle stroke h, the control edge 15 releases the portion of the valve member 4 with a smaller diameter, so that the annular space 26 is in communication with the annular space 10. About the second throttle bores 24 with low throttle effect (almost zero) the injection ports 8 fuel is supplied.
  • the annular gap 16 or the throttle bore 17 in the valve member 4 may be alternatively formed by a radial throttle bore in the guide sleeve 5, as shown in Fig. 6.
  • Fig. 7a shows a throttle resistance D of the fuel injection valve 1 in response to the opening stroke H.
  • the opening stroke h is the first throttle connection with a constant, large throttle effect alone in use.
  • From the opening stroke h additionally acts the second throttle connection and reduces the throttle resistance D to a smaller, also constant value. The smaller value can be very small, it is even possible to lower it to zero.
  • Fig. 7b shown by a first injection curve 18.
  • a second injection curve 19 shows the injection quantity when using a single throttle connection whose throttle resistance is between two throttle resistors of Fig. 7a.
  • the first throttle connection with higher throttle resistance acts as a single throttle connection. Due to the lowered pressure in the annular space 10, the hydraulic opening force is reduced to the valve member and thus its opening speed in this lower stroke range.
  • Throttle with lower throttle resistance the injection behavior and leads to a larger injection quantity in the actual combustion than when using a single throttle connection.
  • the injection pattern can therefore be adjusted much more accurately for optimal combustion using two throttle joints with different throttle resistance than when using a single throttle connection.
  • the guide sleeve is particularly suitable for the provision of throttle connections and also leads to a reduction of the hydraulic surface.

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

L'invention concerne une soupape d'injection de carburant (1) pour moteurs à combustion interne comportant un obturateur (4) qui peut être déplacé axialement dans un orifice (3) du corps de soupape (2). Cette soupape comprend : une surface d'étanchéité de soupape qui est située au niveau de l'extrémité côté chambre de combustion, et qui coopère avec une surface de siège de soupape du corps de soupape (2) ; au moins une ouverture d'injection qui est ménagée en aval de la surface de siège de soupape, et qui s'ouvre dans la chambre de combustion du moteur à combustion interne à alimenter ; une section de guidage du corps de soupape (2) qui guide l'obturateur (4), et qui est disposée axialement entre une fente annulaire adjacente à une conduite de carburant haute pression et un espace annulaire qui mène à la surface de siège de soupape ; un premier raccord papillon qui relie de manière durable la fente annulaire et l'espace annulaire, et ; un deuxième raccord papillon qui relie la fente annulaire et l'espace annulaire à partir d'une levée d'ouverture (h) prédéterminée de l'obturateur (4), et qui présente une résistance d'étranglement inférieure à celle du premier raccord papillon. Selon l'invention, la section de guidage est formée par une douille de guidage (5) qui est fixée de manière stationnaire sur l'extrémité côté chambre de combustion du corps de soupape (2) dans ledit orifice (3).
EP05808003A 2004-12-16 2005-11-15 Soupape d'injection de carburant pour moteur a combustion interne Withdrawn EP1828593A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004060552A DE102004060552A1 (de) 2004-12-16 2004-12-16 Kraftstoffeinspritzventil für eine Brennkraftmaschine
PCT/EP2005/055989 WO2006063912A1 (fr) 2004-12-16 2005-11-15 Soupape d'injection de carburant pour moteur a combustion interne

Publications (1)

Publication Number Publication Date
EP1828593A1 true EP1828593A1 (fr) 2007-09-05

Family

ID=35636651

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05808003A Withdrawn EP1828593A1 (fr) 2004-12-16 2005-11-15 Soupape d'injection de carburant pour moteur a combustion interne

Country Status (6)

Country Link
US (1) US20080296411A1 (fr)
EP (1) EP1828593A1 (fr)
JP (1) JP2008523318A (fr)
CN (1) CN101080568A (fr)
DE (1) DE102004060552A1 (fr)
WO (1) WO2006063912A1 (fr)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005030868A1 (de) * 2005-07-01 2007-01-11 Robert Bosch Gmbh Kraftstoffeinspritzventile bei Kraftmaschinen
DE102007034034A1 (de) * 2007-07-20 2009-01-22 Robert Bosch Gmbh Injektor
DE102008012356A1 (de) 2008-03-03 2009-09-10 Robert Bosch Gmbh Kraftstoffeinspritzvorrichtung
ATE551521T1 (de) * 2008-04-18 2012-04-15 Magneti Marelli Spa Kraftstoffeinspritzdüse mit direkter verschlussbetätigung für verbrennungsmotoren
DE102008001330A1 (de) * 2008-04-23 2009-10-29 Robert Bosch Gmbh Kraftstoffeinspritzventil für Brennkraftmaschinen
DE102008061400A1 (de) * 2008-12-10 2010-06-17 Man Diesel Se Kraftstoff-Einspritzventil für eine Brennkraftmaschine
CN102305162A (zh) * 2011-08-19 2012-01-04 中国兵器工业集团第七○研究所 柴油机的喷油嘴偶件
DE102011082666A1 (de) 2011-09-14 2013-03-14 Robert Bosch Gmbh Kraftstoffinjektor, insbesondere für ein Common-Rail-Einspritzsystem
CN102330627A (zh) * 2011-10-16 2012-01-25 中国兵器工业集团第七0研究所 一种用于水平双对置柴油机的共轨喷油器喷油嘴
DE102012203607A1 (de) * 2012-03-07 2013-09-12 Robert Bosch Gmbh Ventil zum Zumessen eines Fluids
EP2799706A1 (fr) * 2013-05-01 2014-11-05 Delphi International Operations Luxembourg S.à r.l. Buse à injection
DE102013213460A1 (de) 2013-07-09 2015-01-15 Robert Bosch Gmbh Kraftstoffeinspritzventil für Brennkraftmaschinen
GB201408422D0 (en) * 2014-05-13 2014-06-25 Delphi Int Operations Lux Srl Fuel injector
JP6668079B2 (ja) * 2016-01-12 2020-03-18 日立オートモティブシステムズ株式会社 燃料噴射装置
DE102016208055A1 (de) 2016-05-11 2017-11-16 Robert Bosch Gmbh Kraftstoffeinspritzventil für Brennkraftmaschinen

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4987887A (en) 1990-03-28 1991-01-29 Stanadyne Automotive Corp. Fuel injector method and apparatus
JP3136829B2 (ja) * 1993-05-06 2001-02-19 株式会社デンソー 燃料噴射弁
DE19755057A1 (de) * 1997-12-11 1999-06-17 Bosch Gmbh Robert Kraftstoffeinspritzdüse für selbstzündende Brennkraftmaschinen
DE19857244A1 (de) * 1998-12-11 2000-06-15 Bosch Gmbh Robert Kraftstoffeinspritzventil für Brennkraftmaschinen
DE10061571B4 (de) * 2000-12-11 2007-03-22 Robert Bosch Gmbh Brennstoffeinspritzventil
DE10312586A1 (de) * 2003-03-21 2004-09-30 Robert Bosch Gmbh Kraftstoffeinspritzventil für Brennkraftmaschinen

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2006063912A1 *

Also Published As

Publication number Publication date
JP2008523318A (ja) 2008-07-03
CN101080568A (zh) 2007-11-28
US20080296411A1 (en) 2008-12-04
WO2006063912A1 (fr) 2006-06-22
DE102004060552A1 (de) 2006-06-22

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