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EP1346143B1 - Soupape d'injection de carburant destinee a des moteurs a combustion interne - Google Patents

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

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Publication number
EP1346143B1
EP1346143B1 EP01270695A EP01270695A EP1346143B1 EP 1346143 B1 EP1346143 B1 EP 1346143B1 EP 01270695 A EP01270695 A EP 01270695A EP 01270695 A EP01270695 A EP 01270695A EP 1346143 B1 EP1346143 B1 EP 1346143B1
Authority
EP
European Patent Office
Prior art keywords
valve member
bore
throttle
annular collar
fuel injection
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
EP01270695A
Other languages
German (de)
English (en)
Other versions
EP1346143A1 (fr
Inventor
Detlev Potz
Friedrich Moser
Thomas Kuegler
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 EP1346143A1 publication Critical patent/EP1346143A1/fr
Application granted granted Critical
Publication of EP1346143B1 publication Critical patent/EP1346143B1/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
    • F02M61/168—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
    • 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

Definitions

  • the invention relates to a fuel injection valve for Internal combustion engines, preferably self-igniting internal combustion engines, as known from DE 198 57 244 A1 is.
  • a valve body has a bore in which a piston-shaped valve member against a closing force is arranged to be longitudinally displaceable.
  • the valve member comes on its combustion chamber end into a valve sealing surface, which cooperates with a valve seat and so the opening controls at least one injection opening.
  • the valve member is in the bore in a combustion chamber facing away from the combustion chamber Sealing section and in a combustion chamber facing guide section guided in the hole.
  • the guide section is divided into a ring collar facing away from the combustion chamber an annular groove formed on the side of the valve member Recesses is separated, so that fuel through this Recesses between the wall of the bore and the valve member can flow past.
  • the ring collar points to his end facing the combustion chamber on a control edge, which with a cooperates on the wall of the bore formed sealing edge.
  • the bore is a throttle bore trained so that fuel throttled from the pressure chamber to the recesses and thus to a second pressure chamber, the between the valve member and the wall of the bore between the guide section and the valve sealing surface is, can flow.
  • the closed state of the Fuel injection valve is the valve sealing surface of the Valve member on the valve seat and the control edge on the collar is located facing the sealing edge, see that only through the throttle bore a connection from the first to the second pressure chamber. If an injection is to take place, so fuel is under high pressure in the first Pressure chamber initiated and flows from there through the throttle bore also in the second pressure room.
  • valve sealing surface lifts from the valve seat and fuel is through the injection opening into the combustion chamber of the internal combustion engine injected.
  • the control edge on the valve element faces the combustion chamber is too little fuel through the throttle bore from the first to the second pressure chamber reach. If in the course of the opening stroke movement of the valve member the control edge passes the sealing edge, so the first pressure chamber via the ring groove and the recesses on Guide section of the valve member with the second pressure chamber connected and fuel can be almost unthrottled from first flow into the second pressure chamber.
  • the throttle duct is designed as a throttle bore, which is at least approximately parallel to the longitudinal axis of the Valve member runs in the collar.
  • a throttle bore can be advantageously by laser drilling produce what it is a non-contact process so that the throttle bore easily after completion of the whole Valve member can be introduced. It can also be provided that a plurality of such throttle bores distributed over the circumference of the ring collar is to ensure a steady flow of fuel from the first to ensure in the second pressure chamber.
  • the throttle bores are preferably arranged so that a of the recesses in the guide section of the valve member in the combustion chamber extension of the throttle bore, so that there is free access to the combustion chamber Front of the collar by one from the combustion chamber side Laser beam coming end of the valve member is given.
  • the fuel injector is the throttle connection by at least one bevel on the side Ring collar trained. These cuts can be extensive be carried out, which is easy to manufacture and a very precise setting of the cross-section of the throttle connection makes possible.
  • FIG. 1 is a fuel injection valve according to the invention shown in longitudinal section.
  • a valve body 1 In a valve body 1 is a bore 3 is formed, the end facing away from the combustion chamber of the valve body 1 is open and at the combustion chamber end passes into a substantially conical valve seat 13.
  • a piston-shaped Valve member 5 arranged longitudinally.
  • the valve member 5 is with a sealing portion 105 in one bore seal section 103 facing away from the combustion chamber Bore 3 sealingly guided and also with a guide section 205 in a combustion chamber-side bore guide section 203.
  • valve member 5 Goes to its combustion chamber end the valve member 5 in a valve sealing surface 15, which in is essentially conical and with the valve seat 13 cooperates so that the injection openings 17 in the system the valve sealing surface 15 is closed on the valve seat 13 and with the valve sealing surface lifted off the valve seat 13 15 are released.
  • a first Pressure chamber 9 is formed, the one in the valve body 1 extending inlet channel 7 with one in the drawing High-pressure fuel source, not shown, connectable is.
  • valve sealing surface 15 and valve seat 13 via the injection openings 17 is connectable to the combustion chamber.
  • Figure 2 shows an enlarged view of Figure 1 in Area of the bore guide section 203.
  • Figure 3 shows the corresponding cross section along the line III-III of Figure 1 and Figure 2.
  • the guide section 205 is in the bore guide section 203 led and has three areal Grindings 28 on, so that fuel on the guide section 205 past in the axial direction of the valve member 5 can flow.
  • Ahead of the combustion chamber adjoins the guide section 205 an annular groove 26 on and in turn a collar 22.
  • the collar 22 is in a radial plane
  • the valve member 5 is arranged and has a combustion chamber facing End face 37 and an end face facing away from the combustion chamber 36 on.
  • the bore guide section 203 is here in relation to the bore 3 Diameter slightly reduced, so that at the transition of the first Pressure chamber 9 to the bore guide section 203 an annular shoulder 30 is formed, which is delimited by a sealing edge 32 that is at the beginning of the bore guide section 203 is formed.
  • the collar 22 has a diameter which is only slightly smaller than the diameter of the Bore guide section 203 so that when closed Fuel injector has virtually no fuel from the first pressure chamber 9 past the collar 22 through the annular groove 26 and the recesses 28 flow into the second pressure chamber 19 can.
  • three throttle channels are arranged, which are designed as throttle bores 40 and which End face 36 of the collar 22 facing away from the combustion chamber with the Connect the end face 37 of the collar 22 facing the combustion chamber. It can also be provided, more or less to be arranged as three throttle channels.
  • the throttle bores 40 are arranged so that they are at least essentially run parallel to the longitudinal axis 6 of the valve member 5 and that in their extension on the combustion chamber side a bevel 28 is arranged.
  • valve member 5 is not by one in the drawing Applied device with a closing force, the valve member 5 with the valve sealing surface 15 presses against the valve seat 13. Since the valve member 5 from section leading to the combustion chamber in the sealing section 103 tapered towards, is a pressure shoulder 11 on the valve member 5 formed, which is arranged in the first pressure chamber 9. at a corresponding fuel pressure in the pressure chamber 9 results a hydraulic force on the pressure shoulder 11, the a component acting in the longitudinal direction of the valve member 5 has, which is opposite to the closing force. To this The valve member 5 can be pressure-controlled by the Pressure in the first pressure chamber 9 in the longitudinal direction against the Moving closing force and thus the injection openings 17 open and open heading.
  • the fuel injector works like follows: At the beginning of the injection, fuel becomes too high Pressure through the inlet channel 7 into the first pressure chamber 9 directed. From there, the fuel flows through the throttle bores 40 in the second pressure chamber 19, so that there too the fuel pressure increases. Reaches the fuel pressure in the first pressure chamber 9 a certain level, so by the hydraulic force on the pressure shoulder 11 opposes a force the closing force exerted on the valve member 5, the this moves away from the valve seat 13 in the axial direction. As a result, the valve sealing surface 15 lifts off the valve seat 13 and opens the injection openings 17.
  • FIG 4 shows a further embodiment of the invention Fuel injection valve and Figure 5 a Cross section through the fuel injector shown in Figure 4 along the line V-V.
  • the throttle channel between the first pressure chamber 9 and the second pressure chamber 19 is here through two throttle recesses 42 on the collar 22 trained as parallel grindings parallel to Longitudinal axis 6 of the valve member 5 are executed. It can also be provided that more than two throttle recesses 42 are formed on the collar 22. These are preferred evenly distributed over the circumference of the collar 22 arranged to provide a steady fuel flow to enable the second pressure chamber 19.
  • the Ring shoulder 30 bevelled, so that it with the Longitudinal axis 6 of the valve member 5 encloses an angle.

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)

Claims (6)

  1. Injecteur de carburant pour moteurs à combustion interne, comprenant un corps de soupape (1) qui loge dans un alésage (3) un organe de soupape (5) en forme de piston coulissent longitudinalement, lequel organe de soupape (5) commande au moins un orifice d'injection (17) disposé à l'extrémité côté chambre de combustion de l'alésage (3) en étant guidé dans l'alésage (3) par un segment étanche (105) opposé à la chambre de combustion, et un collet annulaire (22) disposé sur l'organe de soupape (5) à l'opposé de la chambre de combustion par rapport au segment étanche (105) et présentant une surface frontale (37) en regard de la chambre de combustion et une surface frontale (36) opposée à la chambre de combustion, ce collet annulaire (22) séparant l'espace entre l'organe de soupape (5) et l'alésage (3) en une première chambre de pression (9) opposée à la chambre de combustion et pouvant être remplie de carburant et une deuxième chambre de pression (19) en regard de la chambre de combustion, et comprenant un segment de guidage d'alésage (203) de l'alésage (3) dans lequel plonge le collet annulaire (22) en position de fermeture de l'organe de soupape (5) en séparant ainsi les deux chambres de pression (9, 19) jusqu'à une section transversale d'étranglement, et dont le collet annulaire (22) ressort lors du mouvement de levage d'ouverture de l'organe de soupape (5) en reliant ainsi l'une à l'autre les chambres de pression (9, 19),
    caractérisé en ce que
    la section transversale d'étranglement est au moins un canal d'étranglement (40, 42) formé dans le collet annulaire (22), qui relie l'une à l'autre les deux surfaces frontales (36, 37) du collet annulaire (22).
  2. Injecteur de carburant selon la revendication 1,
    caractérisé en ce que
    l'au moins un canal d'étranglement (40) s'étend à l'intérieur de l'organe de soupape (5).
  3. Injecteur de carburant selon la revendication 2,
    caractérisé en ce que
    l'au moins un canal d'étranglement présente la forme d'un alésage d'étranglement (40) s'étendant du moins approximativement en parallèle de l'axe longitudinal (6) de l'organe de soupape (5).
  4. Injecteur de carburant selon la revendication 3,
    caractérisé en ce qu'
    une multitude d'alésages d'étranglement (40) est répartie de préférence de manière régulière sur la circonférence du collet annulaire (22).
  5. Injecteur de carburant selon la revendication 1,
    caractérisé en ce que
    le canal d'étranglement est formé par au moins un évidement d'étranglement (42) plan formé au niveau du collet annulaire (22), qui s'étend du moins approximativement en parallèle de l'axe longitudinal (6) de l'organe de soupape (5).
  6. Injecteur de carburant selon l'une quelconque des revendications précédentes,
    caractérisé en ce que
    l'organe de soupape (5) présente un segment de guidage (205) par laquelle l'organe de soupape (5) est guidé dans le segment de guidage d'alésage (203) et qui est disposé en regard de la chambre de combustion par rapport au collet annulaire (22), le segment de guidage (205) présentant au moins une entaille (28) latérale située dans le prolongement de l'au moins un canal d'étranglement (40).
EP01270695A 2000-12-16 2001-11-28 Soupape d'injection de carburant destinee a des moteurs a combustion interne Expired - Lifetime EP1346143B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10062959A DE10062959A1 (de) 2000-12-16 2000-12-16 Kraftstoffeinspritzventil für Brennkraftmaschinen
DE10062959 2000-12-16
PCT/EP2001/013921 WO2002048536A1 (fr) 2000-12-16 2001-11-28 Soupape d'injection de carburant destinee a des moteurs a combustion interne

Publications (2)

Publication Number Publication Date
EP1346143A1 EP1346143A1 (fr) 2003-09-24
EP1346143B1 true EP1346143B1 (fr) 2004-06-16

Family

ID=7667562

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01270695A Expired - Lifetime EP1346143B1 (fr) 2000-12-16 2001-11-28 Soupape d'injection de carburant destinee a des moteurs a combustion interne

Country Status (6)

Country Link
US (1) US6886760B2 (fr)
EP (1) EP1346143B1 (fr)
JP (1) JP2004515706A (fr)
DE (2) DE10062959A1 (fr)
PL (1) PL355635A1 (fr)
WO (1) WO2002048536A1 (fr)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10346212A1 (de) * 2003-10-06 2005-04-21 Bosch Gmbh Robert Kraftstoffeinspritzventil für Brennkraftmaschinen
DE102004025729A1 (de) * 2004-05-26 2005-12-15 Robert Bosch Gmbh Kraftstoffeinspritzventil für eine Brennkraftmaschine
US7472844B2 (en) * 2005-12-21 2009-01-06 Caterpillar Inc. Fuel injector nozzle with tip alignment apparatus
JP4296519B2 (ja) * 2006-12-19 2009-07-15 株式会社日立製作所 燃料噴射弁
JP2009138614A (ja) * 2007-12-05 2009-06-25 Mitsubishi Heavy Ind Ltd 蓄圧式燃料噴射装置の燃料噴射弁
EP2083165A1 (fr) * 2008-01-22 2009-07-29 Delphi Technologies, Inc. Buse à injection
ATE551521T1 (de) * 2008-04-18 2012-04-15 Magneti Marelli Spa Kraftstoffeinspritzdüse mit direkter verschlussbetätigung für verbrennungsmotoren
EP2216542A1 (fr) * 2009-02-06 2010-08-11 Continental Automotive GmbH Ensemble de soupape pour soupape d'injection et soupape d'injection
DE102009046452A1 (de) * 2009-11-06 2011-05-12 Robert Bosch Gmbh Einspritzdüse für einen lecklosen Kraftstoffinjektor
EP2568157A1 (fr) * 2011-09-08 2013-03-13 Delphi Technologies Holding S.à.r.l. Buse à injection
CN104061101A (zh) * 2014-07-14 2014-09-24 北京亚新科天纬油泵油嘴股份有限公司 一种燃料供给系统喷油器及其中的喷油嘴
GB2559598B (en) * 2017-02-10 2020-04-08 Delphi Tech Ip Ltd Fuel injector nozzle assembly

Family Cites Families (5)

* 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
US5899385A (en) * 1995-07-21 1999-05-04 Robert Bosch Gmbh Fuel injection valve for internal combustion engines
US5860597A (en) * 1997-03-24 1999-01-19 Cummins Engine Company, Inc. Injection rate shaping nozzle assembly for a fuel injector
DE19857244A1 (de) * 1998-12-11 2000-06-15 Bosch Gmbh Robert Kraftstoffeinspritzventil für Brennkraftmaschinen
DE19951964A1 (de) * 1999-10-28 2001-05-03 Bosch Gmbh Robert Kraftstoffeinspritzventil für Brennkraftmaschinen

Also Published As

Publication number Publication date
JP2004515706A (ja) 2004-05-27
DE10062959A1 (de) 2002-06-20
DE50102645D1 (de) 2004-07-22
PL355635A1 (en) 2004-05-04
US20040031863A1 (en) 2004-02-19
US6886760B2 (en) 2005-05-03
EP1346143A1 (fr) 2003-09-24
WO2002048536A1 (fr) 2002-06-20

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