EP1200729A1 - Procede de reglage de la levee de la soupape d'injection - Google Patents

Procede de reglage de la levee de la soupape d'injection

Info

Publication number
EP1200729A1
EP1200729A1 EP00958155A EP00958155A EP1200729A1 EP 1200729 A1 EP1200729 A1 EP 1200729A1 EP 00958155 A EP00958155 A EP 00958155A EP 00958155 A EP00958155 A EP 00958155A EP 1200729 A1 EP1200729 A1 EP 1200729A1
Authority
EP
European Patent Office
Prior art keywords
valve
elevation
deformation
valve seat
tool
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.)
Granted
Application number
EP00958155A
Other languages
German (de)
English (en)
Other versions
EP1200729B1 (fr
Inventor
Ferdinand Reiter
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 EP1200729A1 publication Critical patent/EP1200729A1/fr
Application granted granted Critical
Publication of EP1200729B1 publication Critical patent/EP1200729B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • F02M51/00—Fuel-injection apparatus characterised by being operated electrically
    • F02M51/06—Injectors peculiar thereto with means directly operating the valve needle
    • F02M51/061—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means
    • F02M51/0625—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures
    • F02M51/0664—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a cylindrically or partly cylindrically shaped armature, e.g. entering the winding; having a plate-shaped or undulated armature entering the winding
    • F02M51/0671—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a cylindrically or partly cylindrically shaped armature, e.g. entering the winding; having a plate-shaped or undulated armature entering the winding the armature having an elongated valve body attached thereto
    • 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
    • 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

Definitions

  • the invention is based on a method for adjusting the valve lift of an injection valve according to the preamble of claim 1.
  • a method for producing a valve is already known (EP 0 497 931 B1), in which a valve seat part consisting of a valve seat body and a perforated body is deformed between two weld seams in order to adjust the valve needle stroke, which leads to damage to the weld seams and to deformations on the valve seat body can lead.
  • Constriction is introduced.
  • the deformation is basically carried out on the basis of a tubular or sleeve-shaped cylindrical component.
  • the valve seat support is thus deformed immediately to adjust the valve lift.
  • the inventive method for adjusting the valve lift of an injection valve with the characterizing features of claim 1 has the advantage that the stroke of the valve needle can be adjusted in a simple manner, without the risk of undesirable force acting on the valve seat element.
  • valve lift can be set very sensitively and in a defined manner.
  • the method according to the invention allows reliable adjustment with even tighter tolerances.
  • the elevation can be introduced as a bead, in particular by rolling.
  • the deformation tools causing the deformation of the elevation advantageously act on the elevation in the radial direction. If an axial force is applied to the elevation using a deformation tool, the deformation tool must be designed in such a way that the direction of deformation of the elevation is nevertheless radial.
  • FIG. 2 shows a first example of a deformation tool
  • FIG. 3 shows a second example of a deformation tool
  • FIG. 4 shows a third example of a deformation tool
  • FIG. 5 shows a fourth example of a deformation tool.
  • FIG. 1 The electromagnetically actuated valve partially shown in FIG. 1 in the form of a
  • Fuel injection valve for fuel injection systems of mixture-compressing, spark-ignited internal combustion engines is particularly suitable for the direct injection of fuel into a not shown
  • the fuel injector has a tubular core 2 surrounded by a magnetic coil 1 as a so-called inner pole.
  • a coil body 3 receives a winding of the magnetic coil 1 and, in conjunction with the core 2, enables a particularly compact structure of the injection valve in the
  • piezo actuators or magnetostrictive actuators are also suitable as excitable actuating elements.
  • a tubular metallic intermediate part 12 is connected, for example by welding, concentrically to a longitudinal valve axis 10 and partially surrounds the core end 9 axially. Downstream of the bobbin 3 and the intermediate part 12 extends a largely tubular, but for the application of Method according to the invention for adjusting the valve lift of preformed valve seat support 16 which is, for example, firmly connected to the intermediate part 12.
  • a longitudinal opening 18 extends in the valve seat support 16 serving as a connecting part and representing a thin-walled sleeve.
  • a rod-shaped valve needle 19 is arranged, which has a valve closing section 21 at its downstream end.
  • the injection valve is actuated in a known manner, e.g. electromagnetically.
  • the electromagnetic circuit with the magnet coil 1, the core 2 and an armature 26 is used for the axial movement of the valve needle 19 and thus for opening against the spring force of a return spring 25 or closing the injection valve.
  • the armature 26 is with the end facing away from the valve closing section 21
  • Valve needle 19 connected by a weld and aligned with the core 2.
  • a guide and seat unit is tightly mounted in the longitudinal opening 18 by welding.
  • This guiding and seating unit comprises three disc-shaped elements that lie directly against one another with their end faces.
  • a guide element 27, a swirl element 28 and a valve seat element 29 follow one another in the downstream direction. While the guide element 27 and the swirl element 28 are arranged entirely within the longitudinal opening 18, the valve seat element 29 with a stepped outer contour only partially projects into the longitudinal opening 18.
  • the valve seat element 29 is firmly and tightly connected to the valve seat carrier 16 on its downstream end face.
  • the guide element 27, the swirl element 28 and the valve seat element 29 are also fixed to one another connected, wherein a weld seam on the outer circumference of the three elements 27, 28 and 29 offers.
  • a guide opening of the intermediate part 12 and a guide opening in the guide element 27 serve to guide the valve needle 19 during the axial movement along the longitudinal valve axis 10.
  • conical tapering valve closing section 21 interacts with a valve seat surface 32 of valve seat element 29 tapering in the direction of the truncated cone.
  • At least one outlet opening 33 extends through the valve seat element 29.
  • the outlet opening 33 is inclined at an angle to the longitudinal valve axis 10, which extends in a convexly curved spray region of the
  • Valve seat element 29 ends.
  • the fuel flowing through the outlet opening 33 is subject to swirl because an atomization-improving swirl component is impressed on it in front of the valve seat surface 32 in the swirl element 28, in which, for example, several tangential swirl channels are provided.
  • One end position of the valve needle 19 is determined when the solenoid coil 1 is not energized by the valve closing section 21 resting against the valve seat surface 32, while the other end position of the valve needle 19 when the solenoid coil 1 is energized results from the armature 26 resting on the core end 9 of the core 2.
  • the distance between the two end positions represents the valve lift, which is adjustable according to the invention.
  • the magnet coil 1 is surrounded by a cup-shaped valve housing 35, which serves as a so-called outer pole. With its lower end facing the valve seat element 29, the valve housing 35 is firmly attached to the valve seat carrier 16, for example by means of a weld seam.
  • valve seat support 16 encloses the axially movable valve part consisting of armature 26 and valve needle 19 with the valve closing section 21 and partially the guide and seat unit.
  • the valve seat support 16 is elongated, the valve seat support 16 can even make up half or more of the total axial extension length of the injection valve. With this design of the valve seat support 16, the
  • the injection point of the injection valve can be set far in advance, which can be desirable in certain internal combustion engines because of their idiosyncratic shape and limited installation space.
  • the injection point can be optimally set at a desired location in the combustion chamber.
  • such a design means that the fuel injection valve with its downstream end and thus with its metering and
  • Spray area clearly extends into the intake pipe.
  • targeted spraying onto one or more inlet valves largely avoids wetting the wall of the intake pipe and, as a result, reduces the exhaust gas emission of the internal combustion engine.
  • valve seat carrier 16 Through the use of the relatively cheap sleeve for the valve seat carrier 16, it is possible to turn on the usual in injection valves rotating parts, which are more voluminous and because of their larger outer diameter
  • a sealing element 41 arranged in a groove 40 made on the outer circumference of the valve seat support 16 serves for Sealing between the circumference of the injection valve and a valve holder, not shown, in the cylinder head or on an intake line of the internal combustion engine.
  • the sealing element 41 is made, for example, of a plastic such as PTFE.
  • the valve seat support 16 is characterized in that at least one radially outward elevation or curvature is provided in the form of a bead 43 which, for example, completely rotates in the circumferential direction.
  • a plurality of radial beads 43 can also be formed over the axial length of the valve seat carrier 16.
  • a plurality of circumferentially distributed, deepened formations in the form of beads 44 which increase the rigidity, can also be provided in another area of extension of the valve seat carrier 16. These beads 44 have a certain longitudinal extent.
  • the bead 43 is introduced, for example, by rolling. Before the actual process of dividing the valve lift, there is a preformed component that has at least one outward radial elevation in the form of a bead 43.
  • the circumference of the valve seat support 16 is plastically deformed, specifically in the region of the bead 43.
  • the bead 43 is deformed with a radial force acting on the bead 43 ,
  • the valve seat support 16 can be changed very delicately and in a defined manner in its axial length, in particular enlarged, whereby a very exact adjustment of the valve stroke is possible.
  • the static amount of fuel delivered during the static opening of the valve is first measured in a known manner as the actual amount. This actual quantity is compared with a predetermined nominal quantity of the fuel to be sprayed off in a computer and a nominal stroke of the valve needle 19 is determined therefrom.
  • the actual actual stroke of the valve needle 19 is measured by means of a position measuring device and compared in a computer with the predetermined desired stroke. On the basis of the difference between the actual stroke and the desired stroke of the valve needle 19 determined by the computer, a control signal is generated which is used to actuate a deformation tool 48. The deformation tool 48 is subsequently actuated for the plastic deformation of the valve seat carrier 16 until the actual stroke (actual stroke) of the valve needle 19 corresponds to the desired stroke.
  • FIGS. 2 to 5 show several possibilities for the deformation of the valve seat carrier 16 according to the invention in the region of the bead 43 for adjusting the valve lift.
  • FIG. 2 shows a deformation tool 48 which consists of two half-shells 49. Both half-shells 49 have an inner curved area with which they can grip around the bulge 43 of the valve seat support 16 over a large part of the circumference. A radial force is applied to the valve seat support 16 with the half-shells 49 in accordance with the directions of the arrows, so that its axial length changes.
  • a comparable deformation tool 48 is shown in FIG. 3, in which, however, instead of two half-shells 49, four tool segments 50 act on the valve seat support 16 in the region of the bead 43.
  • the arrows again illustrate the direction of the force.
  • the four tool segments 50 each encompass approximately A of the circumference of the bead 43.
  • Figure 4 is intended to illustrate two deformation options.
  • the valve is fixed in its position in a manner not shown, and the deformation tool 48 with at least one roller 51 is moved in the direction of the radial arrow onto the valve seat support 16 and circles the valve seat support 16 for deforming the bead 43 in accordance with the arrow in the circumferential direction
  • the rolling tool 48, 51 can also be fixed, and the valve is moved towards the rolling tool 48, 51 and set in a rotational movement. It is also possible that both the valve with its valve seat support 16 and the rolling tool 48, 51 are moved towards one another and both are set in rotation.
  • FIG. 5 A further possibility of deformation is shown in FIG. 5.
  • the force acting on the bead 43 is carried out by the deformation tool 48 in the axial direction.
  • Deformation tool 48 consists of at least two tool segments 52, each of which has a conical inner surface 53 which, when using the deformation tool 48, is directed toward the valve seat carrier 16.
  • the taper of the tool segments 52 runs in such a way that the bead 43 is reduced in its radial height when the tool segments 52 are moved axially.
  • the bead 43 can also be deformed by magnetic shaping. For this purpose, a locally limited strong magnetic field is generated in the region of the bead 43. Since the valve seat carrier 16 is ferritic, for example, the deformation of the bead 43 and thus the valve lift can be set in a targeted manner via the strength of the magnetic field.
  • the accuracy of the setting of the valve lift can be influenced by the geometry of the bead 43 (such as, for example, the flank angle and the radius) or by the sheet thickness of the valve seat carrier 16.

Landscapes

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

Abstract

L'invention concerne un procédé de réglage de la levée d'une soupape d'injection, notamment d'une soupape d'injection de carburant de moteurs à combustion interne à compression de mélange et allumage à étincelles. La soupape a une entrée de carburant, un dispositif de commande excitable (1, 2, 26, 35) qui permet de déplacer un pointeau (19) doté d'un obturateur (21), un siège fixe (32) conçu sur un élément siège (29) et avec lequel l'obturateur (21) coopère pour ouvrir et fermer la soupape, et enfin une sortie de carburant (33). La soupape comprend également un support de siège (16) pourvu d'un orifice longitudinal (18) interne permettant de recevoir le pointeau (19). Le pointeau (19) exécute une course entre une position fermeture de soupape et une position ouverture de soupape. Le support de siège (16) est préformé avec au moins une protubérance (43) en saillie radiale vers l'extérieur. Pour modifier la course du pointeau (19), la protubérance (43) est déformée plastiquement dans le sens radial par rapport à l'orifice longitudinal (18).
EP00958155A 1999-07-14 2000-07-14 Procede de reglage de la levee de la soupape d'injection Expired - Lifetime EP1200729B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19932762A DE19932762A1 (de) 1999-07-14 1999-07-14 Verfahren zur Einstellung des Ventilhubs eines Einspritzventils
DE19932762 1999-07-14
PCT/DE2000/002337 WO2001004487A1 (fr) 1999-07-14 2000-07-14 Procede de reglage de la levee de la soupape d'injection

Publications (2)

Publication Number Publication Date
EP1200729A1 true EP1200729A1 (fr) 2002-05-02
EP1200729B1 EP1200729B1 (fr) 2004-10-06

Family

ID=7914649

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00958155A Expired - Lifetime EP1200729B1 (fr) 1999-07-14 2000-07-14 Procede de reglage de la levee de la soupape d'injection

Country Status (7)

Country Link
US (1) US6786432B1 (fr)
EP (1) EP1200729B1 (fr)
JP (1) JP2003504551A (fr)
KR (1) KR20020027487A (fr)
BR (1) BR0013158A (fr)
DE (2) DE19932762A1 (fr)
WO (1) WO2001004487A1 (fr)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1445477B1 (fr) * 2003-01-24 2006-04-05 Siemens VDO Automotive S.p.A. Dispositif de dosage avec calibreur du débit et procédé pour ajuster le débit du dispositif de dosage
US8870742B2 (en) 2006-04-06 2014-10-28 Ethicon Endo-Surgery, Inc. GUI for an implantable restriction device and a data logger
JP4491474B2 (ja) * 2007-05-31 2010-06-30 日立オートモティブシステムズ株式会社 燃料噴射弁及びそのストローク調整方法
DE102007031981B4 (de) 2007-07-10 2023-01-12 Robert Bosch Gmbh Magnetventil
US8024861B2 (en) * 2008-05-16 2011-09-27 Delphi Technologies, Inc. External stroke/flow setting method for fuel injectors
DE102008002487A1 (de) * 2008-06-18 2009-12-24 Robert Bosch Gmbh Verfahren zur Hubeinstellung eines Ventils
CN101592107B (zh) * 2009-04-24 2011-06-15 靳北彪 发动机用壳体形变燃油喷射器
CN101555852B (zh) * 2009-04-30 2011-07-20 靳北彪 发动机用直控式壳体形变流体喷射器
ITBO20090787A1 (it) * 2009-12-09 2011-06-10 Magneti Marelli Spa Metodo di calibrazione della corsa di un equipaggio mobile di un iniettore elettromagnetico di carburante
JP5537493B2 (ja) * 2011-05-13 2014-07-02 日立オートモティブシステムズ株式会社 燃料噴射弁のストローク調整方法及び燃料噴射弁

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DE2633820A1 (de) * 1976-07-28 1978-02-02 Kloeckner Humboldt Deutz Ag Abgeschirmte hochdruckleitung
US4528959A (en) * 1984-01-23 1985-07-16 Deere & Company Seal for an internal combustion engine
DE4026721A1 (de) 1990-08-24 1992-02-27 Bosch Gmbh Robert Einspritzventil und verfahren zur herstellung eines einspritzventils
US5365906A (en) * 1993-12-20 1994-11-22 Chrysler Corporation Fluid flow check valve for fuel system
DE19640782A1 (de) 1996-10-02 1998-04-09 Bosch Gmbh Robert Ventil und Verfahren zur Herstellung eines Ventiles
DE19723953A1 (de) 1997-06-06 1998-12-10 Bosch Gmbh Robert Brennstoffeinspritzventil
DE19744739A1 (de) * 1997-10-10 1999-04-15 Bosch Gmbh Robert Brennstoffeinspritzventil
JP3922413B2 (ja) 1998-05-12 2007-05-30 株式会社デンソー 燃料噴射弁及びその組立方法
DE19962968A1 (de) * 1999-12-24 2001-06-28 Bosch Gmbh Robert Ausgleichselement

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Title
See references of WO0104487A1 *

Also Published As

Publication number Publication date
US6786432B1 (en) 2004-09-07
JP2003504551A (ja) 2003-02-04
KR20020027487A (ko) 2002-04-13
EP1200729B1 (fr) 2004-10-06
WO2001004487A1 (fr) 2001-01-18
DE19932762A1 (de) 2001-01-18
BR0013158A (pt) 2002-04-09
DE50008142D1 (de) 2004-11-11

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