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EP1373715B1 - Soupape d'injection de carburant pour moteurs a combustion interne - Google Patents

Soupape d'injection de carburant pour moteurs a combustion interne Download PDF

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Publication number
EP1373715B1
EP1373715B1 EP02727266A EP02727266A EP1373715B1 EP 1373715 B1 EP1373715 B1 EP 1373715B1 EP 02727266 A EP02727266 A EP 02727266A EP 02727266 A EP02727266 A EP 02727266A EP 1373715 B1 EP1373715 B1 EP 1373715B1
Authority
EP
European Patent Office
Prior art keywords
valve
valve member
sealing surface
fuel
valve seat
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.)
Expired - Lifetime
Application number
EP02727266A
Other languages
German (de)
English (en)
Other versions
EP1373715A1 (fr
Inventor
Christoph Buehler
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 EP1373715A1 publication Critical patent/EP1373715A1/fr
Application granted granted Critical
Publication of EP1373715B1 publication Critical patent/EP1373715B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • F02M61/18—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for
    • F02M61/1873—Valve seats or member ends having circumferential grooves or ridges, e.g. toroidal
    • 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
    • F02M61/047—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 the valves being formed by deformable nozzle parts, e.g. flexible plates or discs with fuel discharge orifices
    • 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
    • F02M2200/30—Fuel-injection apparatus having mechanical parts, the movement of which is damped

Definitions

  • the invention is based on a fuel injection valve for Internal combustion engines, as for example from the published patent application DE 196 18 650 A1 is known.
  • Fuel injection valve has a valve body, in a bore is formed.
  • a piston-shaped valve member disposed longitudinally displaceable, the has a valve sealing surface at its combustion chamber end, the one with the combustion chamber end of the bore trained valve seat cooperates.
  • the valve member is surrounded by a pressure chamber formed in the valve body, whereby this pressure space can be filled with fuel under high pressure is and extends to the valve seat.
  • In the valve seat at least one injection opening is formed, the bore and thus the pressure chamber with the combustion chamber the internal combustion engine connects.
  • valve member By a longitudinal movement of the valve member raises the valve member with the valve sealing surface from the valve seat, so that the pressure chamber with the injection openings is connected.
  • valve seat formed substantially conically, wherein the tip of the the conical surface forming cone to the combustion chamber trimmed is.
  • the valve sealing surface of the valve member is corresponding also conical, wherein the valve sealing surface two conical surfaces with different angles of inclination has, so that at the transition of these two conical surfaces a sealing edge is formed. In the closed position of the valve member, so if the valve sealing surface on the valve seat is applied, this sealing edge is pressed into the valve seat, so that a secure seal of the pressure chamber opposite the injection openings is possible.
  • the valve member is by a device with a Closing force applied, the valve member to the valve seat presses. Due to the hydraulic pressure in the pressure chamber the valve member experiences an acting in the axial direction Force, which is directed against this closing force. exceeds the pressure in the pressure chamber has an opening pressure, so will the hydraulic force on the valve member is greater than that Closing force and the valve member moves out of the Closed position away from the valve seat.
  • the size of this opening pressure depends among other things on which diameter has the sealing edge on the valve seat.
  • a change of the Opening pressure goes with a change in the injection characteristic the injection valve, so that at least one approximately constant opening pressure indispensable for an optimal injection is.
  • valve member having a substantially conical valve sealing surface having, with it with a correspondingly shaped valve seat interacts.
  • the valve sealing surface are two annular grooves formed, and on the remaining between the annular grooves section the valve sealing surface is the sealing edge, with the the valve member rests on the valve seat in the closed position.
  • the sealing edge with time hammered into the valve seat and the hydraulic effective seal diameter changes.
  • the fuel injection valve according to the invention with the characterizing Features of claim 1 has in contrast the advantage that the opening pressure of the fuel injection valve does not change during operation.
  • the valve member an end portion in which two annular grooves are formed are.
  • the first annular groove in a radial plane arranged the longitudinal axis of the valve member and the second annular groove axially arranged to the valve seat to move and parallel to the first annular groove.
  • the valve sealing surface can optimally adapt to the valve seat, so that even in the Time just before the injection, where by the rising Pressure in the pressure chamber of the valve body somewhat elastic widened, an optimal investment of the valve sealing surface takes place at the valve seat.
  • the first annular groove is always with the pressure chamber hydraulically connected. Due to the hydraulic pressure in the first annular groove is widened this slightly elastic, so that the remaining between the two annular grooves ring web the valve member at the beginning of the opening stroke against the valve seat is pressed. This ensures that the hydraulically effective sealing line diameter always corresponds to the edge at the transition of the first ring groove is formed to the valve sealing surface. This applies independently angle tolerances in new condition or wear over the lifetime.
  • the edges, at the transition of the annular grooves to the valve sealing surface are formed, rounded or bevelled. This results in a reduction of the notch effect by pressing these edges into the valve seat.
  • the result is a better high pressure stability and allows the spring-trained annular web of the valve sealing surface in the opening or closing movement a rolling Movement on the valve seat.
  • FIG 1 is a longitudinal section through an inventive Fuel injection valve shown.
  • a valve body 1 which is part of a fuel injection system for Internal combustion engine forms, has a bore 3, in the a piston-shaped valve member 5 arranged longitudinally displaceable is that has a longitudinal axis 6.
  • the Valve member 5 In installation position of the Fuel injection valve in the internal combustion engine is the closed end of the bore 3 facing the combustion chamber.
  • the Valve member 5 is in a brennraumabgewandten section in the bore 3 sealingly and tapers the combustion chamber to form a pressure shoulder 9.
  • the valve member 5 At his the combustion chamber end is the valve member 5 in an im essential conical end portion 22 about, with a also conical at the combustion chamber end of the bore.
  • 3 trained valve seat 18 cooperates.
  • a pressure chamber 7 is formed, which acts as a valve member 5 surrounding annular channel continues to the valve seat 18.
  • the pressure chamber 7 With a not in the drawing shown high-pressure fuel source connected so that he can be filled with fuel under high pressure.
  • a guide portion 10 is formed through which the valve member 5 out in a guide portion 14 of the bore 3 becomes.
  • the guide section 10 To the fuel flow from the pressure chamber 7 to the valve seat 18, at the guide section 10 are several, For example, four recesses 12 are arranged, evenly arranged distributed over the circumference of the valve member 5 are and that enable the fuel flow.
  • valve seat 18 At least one injection opening 20 is formed, the bore 3 with the combustion chamber of the internal combustion engine combines.
  • the at least one injection port 20 is released or closed, so that fuel from the pressure chamber 7 through the injection port 20 controlled by the valve member 5 in can reach the combustion chamber of the internal combustion engine.
  • the control of the injection operation of the fuel injection valve is done by hydraulic forces.
  • An injection cycle looks like this:
  • the valve member 5 is by a device not shown in the drawing acted upon by a closing force, the valve member. 5 with the end portion 22 presses on the valve seat 18. hereby the pressure chamber 7 is closed with respect to the injection openings, and there is no fuel through the injection ports 20 in the combustion chamber of the internal combustion engine.
  • By introducing fuel under high pressure through the Inlet channel 4 in the pressure chamber 7 results in a hydraulic Force in the longitudinal direction of the valve member 5 by applying the pressure shoulder 9 and at least partial areas of the end region 22.
  • Exceed these hydraulic forces the closing force on the valve member the valve member moves 5 away from the valve seat 18 and the end portion 22 lifts from the valve seat 18.
  • FIG 2 is an enlargement of Figure 1 in one with II designated section shown.
  • the essentially conical End surface 22 of the valve member 5 has a first Ring groove 30 and a second annular groove 32, wherein the second Ring groove arranged axially offset from the first annular groove 30 is, but with both annular grooves 30,32 parallel to each other are.
  • the annular grooves 30, 32 are each at least approximately in a radial plane with respect to the longitudinal axis 6 of the valve member 5 arranged.
  • valve sealing surface 26 is at an intermediate the ring grooves 30,32 remaining ring land 27 is formed.
  • the first conical surface 24, the valve sealing surface 26 and the second cone surface 28 are all at least approximately the same cone angle, but is the first Conical surface 24 and the second conical surface 28 slightly set back, so that in the closed position of the valve member 5, the is when the pressure chamber 7 against the injection openings 20th is closed, only the valve sealing surface 26 on the valve seat 18 comes to the plant. This position is shown in FIG. By the recessed first conical surface 24 remains the first annular groove 30 always with the pressure chamber 7 hydraulically connected because between the first cone surface 24 and the Valve seat 18 always a gap remains.
  • FIG 3 is an enlargement of Figure 2 in III designated area shown.
  • the valve member 5 is located Here in a slightly open state, so that the Valve sealing surface 26 is not applied to the valve seat 18.
  • hydraulically Part of the end portion 22 of the valve member 5 corresponds to the first cone surface 24 to the first edge 35, which at the transition the first annular groove 30 is formed to the valve sealing surface 26 is and that forms the sealing line.
  • the hydraulic, in axial forces acting on the walls of the first Ring groove 30 cancel each other.
  • valve sealing surface 26 something is deformed away from the combustion chamber, causing the Sealing surface 26 always optimally applied to the valve seat 18.
  • the Deformation of the valve sealing surface 26 may go so far that the second conical surface 28 in the closed state of the Fuel injection valve on the valve seat 18 comes to rest and thereby limits the deformation of the valve sealing surface 26.
  • the second cone surface 28 covers the injection opening 20, so will be between the individual injections the one connected to the combustion chamber and fuel filled space of the injector minimized, which is favorable affects the pollutant emission of the internal combustion engine.
  • the annular ridge 27 with the valve sealing surface formed thereon 26 has a height D in the direction of the longitudinal axis 6, which must be such that allows elastic deformations be without the valve sealing surface 26 their stability loses.
  • the height D is therefore preferably 0.3 mm to 0.5 mm, the axial height of the annular grooves 30, 32 about 0.2 mm up to 0.4 mm.
  • valve sealing surface 26th limiting edges so the combustion chamber facing away from the first Edge 35 and the combustion chamber facing the second edge 37, rounded or beveled formed. hereby can the valve sealing surface 26 during the opening movement roll the valve member 5 on the valve seat 18 and the notch stresses, when pressing the edges 35,37 in the valve seat 18 arise, are thereby minimized.

Landscapes

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

Claims (4)

  1. Injecteur de carburant pour des moteurs à combustion interne comportant
    un corps d'injecteur (1) muni d'un organe d'obturation de soupape (5) en forme de piston logé en coulissement longitudinal dans un perçage (3), l'organe d'obturation (5) étant entouré sur au moins une partie de sa longueur par une chambre de pression (7) recevant du carburant, et
    un siège de soupape (18) réalisé à l'extrémité du perçage (3) du côté de la chambre de combustion, contre lequel l'organe de soupape (5) vient en appui par une surface d'étanchéité de soupape (26) en position de fermeture, pour séparer la chambre de pression (7) d'au moins un orifice d'éjection prévu en aval de la surface d'étanchéité de soupape (18), avec
    dans la zone d'extrémité de l'organe de soupape (5), du côté de la chambre de combustion, une première rainure annulaire (30) et en parallèle à celle-ci une seconde rainure annulaire (32), tournée axialement du côté du siège de soupape (18), la surface d'étanchéité de soupape (26) étant prévue sur une entretoise annulaire (27) qui subsiste entre les deux rainures annulaires (30, 32),
    caractérisé en ce que
    l'entretoise annulaire (27) de l'organe de soupape (5) qui subsiste entre les deux rainures annulaires (30 ; 32) a un bord extérieur élastique dans la direction de déplacement de l'organe de soupape (5).
  2. Injecteur de carburant selon la revendication 1,
    caractérisé en ce que
    la surface d'étanchéité de soupape (26) est au moins approximativement de forme conique.
  3. Injecteur de carburant selon la revendication 1,
    caractérisé en ce que
    la première rainure annulaire (30) est reliée hydrauliquement en permanence à la chambre de pression (7).
  4. Injecteur de carburant selon la revendication 1,
    caractérisé en ce que
    les arêtes (35 ; 37) réalisées à la jonction des rainures annulaires (30 ; 32) et de la surface d'étanchéité de soupape (26) sont arrondies ou en biais.
EP02727266A 2001-03-28 2002-03-26 Soupape d'injection de carburant pour moteurs a combustion interne Expired - Lifetime EP1373715B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10115216 2001-03-28
DE10115216A DE10115216A1 (de) 2001-03-28 2001-03-28 Kraftstoffeinspritzventil für Brennkraftmaschinen
PCT/DE2002/001091 WO2002077445A1 (fr) 2001-03-28 2002-03-26 Soupape d'injection de carburant pour moteurs a combustion interne

Publications (2)

Publication Number Publication Date
EP1373715A1 EP1373715A1 (fr) 2004-01-02
EP1373715B1 true EP1373715B1 (fr) 2005-01-05

Family

ID=7679340

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02727266A Expired - Lifetime EP1373715B1 (fr) 2001-03-28 2002-03-26 Soupape d'injection de carburant pour moteurs a combustion interne

Country Status (5)

Country Link
US (1) US6923388B2 (fr)
EP (1) EP1373715B1 (fr)
JP (1) JP2004518890A (fr)
DE (2) DE10115216A1 (fr)
WO (1) WO2002077445A1 (fr)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10245573A1 (de) * 2002-09-27 2004-04-08 Robert Bosch Gmbh Kraftstoffeinspritzventil für Brennkraftmaschinen
DE10259169A1 (de) * 2002-12-18 2004-07-01 Robert Bosch Gmbh Kraftstoffeinspritzventil für Brennkraftmaschine
RU2240439C1 (ru) * 2003-04-04 2004-11-20 Московский автомобильно-дорожный институт (Государственный технический университет) Форсунка многотопливного дизеля
DE10322826A1 (de) * 2003-05-19 2004-12-09 Robert Bosch Gmbh Kraftstoffeinspritzventil für Brennkraftmaschinen
DE602004018259D1 (de) * 2004-01-28 2009-01-22 Continental Automotive Italy S Einspritzventil mit verformbarer Nadel
EP1559905A1 (fr) * 2004-01-29 2005-08-03 Siemens VDO Automotive S.p.A. Injecteur de fluide avec une aiguille de soupape deformable
DE102004021340A1 (de) * 2004-04-30 2005-11-24 Siemens Ag Düsenbaugruppe und Ventil
EP2063872B2 (fr) * 2006-08-30 2019-12-04 Jagotec AG Formulations posologiques à libération contrôlée administrées par voie orale comprenant un noyau et une ou plusieurs couches barrières
DE102009042155A1 (de) * 2009-09-21 2011-04-07 Continental Automotive Gmbh Kraftstoff-Einspritzventil für eine Brennkraftmaschine
WO2012085901A2 (fr) * 2011-05-09 2012-06-28 Lietuvietis Vilis I Canal d'égalisation de pression à trous recouverts par aiguille
DE102016203028A1 (de) * 2016-02-26 2017-08-31 Bayerische Motoren Werke Aktiengesellschaft Kraftstoffinjektor
CN107143452B (zh) * 2017-07-17 2024-03-08 辽阳新风科技有限公司 一种油嘴偶件、喷油器及汽车
US11746734B2 (en) * 2018-08-23 2023-09-05 Progress Rail Services Corporation Electronic unit injector shuttle valve
DE102019210551A1 (de) * 2019-07-17 2021-01-21 Robert Bosch Gmbh Kraftstoffinjektor
CN112282999B (zh) * 2020-10-30 2021-10-22 安徽江淮汽车集团股份有限公司 一种能够降低落座声的喷油器结构

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1952816A (en) 1931-04-04 1934-03-27 Bendix Res Corp Fuel injector
DE2543805C2 (de) * 1975-10-01 1986-05-07 Robert Bosch Gmbh, 7000 Stuttgart Elektromagnetisch betätigbares Einspritzventil
EP0296628B1 (fr) * 1987-06-26 1993-02-24 Hitachi, Ltd. Soupape d'injection de combustible à commande électromagnétique
DE19618650B4 (de) 1996-05-09 2006-04-27 Robert Bosch Gmbh Verfahren zur Herstellung eines Kraftstoffeinspritzventils für Brennkraftmaschinen
DE19844638A1 (de) 1998-09-29 2000-03-30 Siemens Ag Kraftstoffeinspritzventil für eine Brennkraftmaschine
DE19931891A1 (de) * 1999-07-08 2001-01-18 Siemens Ag Kraftstoffeinspritzventil für eine Brennkraftmaschine
DE19944638A1 (de) 1999-09-17 2001-03-22 Hettich Paul Gmbh & Co Befestigungsanordnung

Also Published As

Publication number Publication date
DE50201953D1 (de) 2005-02-10
WO2002077445A1 (fr) 2002-10-03
EP1373715A1 (fr) 2004-01-02
DE10115216A1 (de) 2002-10-10
US20030173428A1 (en) 2003-09-18
US6923388B2 (en) 2005-08-02
JP2004518890A (ja) 2004-06-24

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