EP1960657A1 - Guide a deformation optimisee de l'induit de soupapes magnetiques - Google Patents

Guide a deformation optimisee de l'induit de soupapes magnetiques

Info

Publication number
EP1960657A1
EP1960657A1 EP06807272A EP06807272A EP1960657A1 EP 1960657 A1 EP1960657 A1 EP 1960657A1 EP 06807272 A EP06807272 A EP 06807272A EP 06807272 A EP06807272 A EP 06807272A EP 1960657 A1 EP1960657 A1 EP 1960657A1
Authority
EP
European Patent Office
Prior art keywords
guide
armature
anchor
fuel injector
valve
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Withdrawn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
EP06807272A
Other languages
German (de)
English (en)
Inventor
Andreas Rettich
Stefan Haug
Markus Rueckle
Stephan Amelang
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 EP1960657A1 publication Critical patent/EP1960657A1/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Withdrawn legal-status Critical Current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
    • F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
    • F02M63/0012—Valves
    • F02M63/007—Details not provided for in, or of interest apart from, the apparatus of the groups F02M63/0014 - F02M63/0059
    • F02M63/0071—Details not provided for in, or of interest apart from, the apparatus of the groups F02M63/0014 - F02M63/0059 characterised by guiding or centering means in valves including the absence of any guiding means, e.g. "flying arrangements"
    • 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
    • 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
    • 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
    • F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
    • F02M63/0012—Valves
    • F02M63/0014—Valves characterised by the valve actuating means
    • F02M63/0015—Valves characterised by the valve actuating means electrical, e.g. using solenoid
    • 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
    • F02M2200/16—Sealing of fuel injection apparatus not otherwise provided for
    • 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
    • F02M2547/003—Valve inserts containing control chamber and valve piston

Definitions

  • DE 196 50 865 A1 describes a solenoid valve for controlling the fuel pressure in a control chamber of an injection valve, for example a common rail injection system.
  • a stroke movement of a valve piston, with which an injection opening of the injection valve is opened or closed, is controlled via the fuel pressure in the control chamber.
  • the solenoid valve comprises an electromagnet, a movable armature and a valve member which is moved with the armature and acted upon in the closing direction by a valve closing spring and which cooperates with the valve seat of the solenoid valve and thus controls the fuel outflow from the control chamber.
  • the armature vibration and / or bouncing of the valve member that occurs during operation has a disadvantageous effect.
  • the anchor plate hitting the valve seat takes an undefined position.
  • the solenoid valve opens differently and thus the start of injection and the injection quantity are scattered.
  • the armature of the solenoid valve is designed as a two-part armature assembly so as to reduce the moving mass of the armature and valve member unit and thus the kinetic energy causing the bouncing.
  • the two-part armature comprises an armature bolt and an armature plate which is displaceably received on the armature bolt against the force of a return spring in the closing direction of the valve member under the action of its inertial mass and which is secured to the armature bolt by means of a locking washer and a locking sleeve surrounding it.
  • the locking sleeve and locking washer are enclosed by the magnetic core, which results in an increased space requirement and which leads to a larger diameter in the magnetic core. Because of the larger diameter in the magnetic core, the magnetic flux is limited.
  • the exact setting of the maximum path length, which is available to the anchor plate on the anchor bolt as a sliding path, has proven to be problematic.
  • the maximum path length referred to as the stroke which is made up of the anchor stroke and the overstroke, is generally measured with a standard disc. A classified shim is then inserted to set the desired stroke. The magnet group is then screwed to the injector body and then the stroke is measured in the screwed or clamped state. At most, tolerances in the micrometer range can be tolerated for the application in order to ensure reproduced injector behavior. To ensure that the narrow tolerance limits are actually adhered to, it is often necessary to dismantle the complete magnet group. The process may have to be repeated several times until acceptable tolerances are achieved, but this leads to high costs in production.
  • the armature assembly comprises an armature bolt, an armature plate and a valve tensioning screw, designed as a fitting screw, with an armature bolt guide section.
  • a pre-assembly that takes place outside the injector body allows a common setting of the tolerance of armature stroke and overstroke by means of a conical or cylindrical dowel pin that connects the armature plate with the armature bolt. It turns out to be disadvantageous that the number of elements to be assembled increases.
  • the object of the solution proposed according to the invention is to reduce the deformation of an armature guide when it is fixed within the injector body of a fuel injector.
  • a radial constriction of the component constituting the armature guide increases the friction between the armature bolt of an armature assembly formed in one or more parts in such a way that the lifting movement of the armature bolt is impermissibly impeded.
  • the solution proposed according to the invention enables the radial constriction of the component representing the anchor guide to be reduced, so that the lubricating film formed between the anchor bolt and the inside of the component representing the anchor guide is also retained and material contact between the material of the anchor bolt and the Material of the component representing the anchor guide can be avoided.
  • Figure 3 shows the anchor guide in an enlarged view.
  • FIG. 1 shows a section through a solenoid valve of a fuel injector with an armature assembly which is constructed in several parts and has an armature bolt and an armature plate accommodated thereon.
  • the fuel injector shown in Figure 1 comprises an injector body 2, in which an injection valve member 3 is movably guided. The injection valve member 3 is acted upon on one end face by the pressure prevailing in a control chamber 4.
  • the control chamber 4 is filled via an inlet throttle 5.
  • a closing element 8 serves to relieve the pressure in the control chamber 4 and closes a relief channel 6 with the outlet throttle 7 accommodated therein.
  • the closing element 8, which is spherical in FIG. 1, is accommodated in a closing element guide body 9.
  • the closing element guide body 9 is received on an anchor bolt 11 of a multi-part anchor 10.
  • the anchor bolt 11 is enclosed by an anchor guide 13.
  • An anchor plate 15 is also received on the anchor bolt 11.
  • the anchor plate 15 is enclosed by an anchor spring 18 which acts on the anchor plate 15 on its underside and also surrounds the anchor guide 13.
  • the magnetic core of the electromagnet 16 has a bore C with a first diameter, into which the upper end of the armature bolt 11 projects.
  • the armature assembly 10 which comprises the armature bolt 11 and the armature plate 15 guided thereon, is preloaded by means of a valve spring 20.
  • the armature guide 13 is adjusted via the valve clamping screw 21 to an adjusting disk 22, which in turn is supported on a valve piece 23.
  • FIG. 2 shows the deformation of the armature guide of the shim as well as the end face of the valve piece in an exaggerated representation. It can be seen from the illustration in FIG. 2 that when the valve clamping screw 21 is tightened with a predetermined torque, it deforms a disk-shaped fixing area 28 at the lower end of the armature guide 13 in such a way that a deformation 25 occurs. Due to the deformation 25, a radial constriction 24 is established between the outer surface of the anchor bolt 11 and the inside of the anchor guide 13.
  • the adjusting washer 22, on which the fixing area 28 of the armature guide 13 is supported assumes a deformed state 26.
  • the upper end face of the valve piece 23 is also shown as exaggerated in FIG Applying a predefined tightening torque to the valve clamping screw 21 as shown in FIG. 2, deformed.
  • only one half of the armature guide 13 is shown, just as in FIG. 2 only one half of the valve clamping screw 21 and one half of the valve piece 23 are shown.
  • Figure 3 shows an anchor guide in an enlarged view.
  • the anchor guide 13 has a first end face 30 on which the anchor plate 15 is supported as shown in FIG. 1.
  • the anchor guide 13 further comprises the fixing area 28 shown in FIG. 2 in its deformed state, which is set by the valve clamping screw 21 on the adjusting disk 22, which is preferably a classified adjusting ring.
  • the fixing area 28 of the anchor guide 13 according to FIG. 3 comprised an upper side 34 and a lower side 35.
  • a circumferential recess 33 is made in the lower side 35, which e.g. can be groove-shaped and serves as relief.
  • On the inner circumferential surface of the anchor guide 23 there is a guide surface 37 for the anchor bolt 11.
  • the guide surface 37 for the anchor bolt 11 are made with a high surface quality.
  • a lubricating film is formed between the anchor bolt 11 (not shown in FIG. 3) and the guide surface 34, which reduces the friction between the anchor bolt 11 and the guide surface 37 of the anchor guide 13 when the electromagnet 16 shown in FIG. 1 is actuated.
  • the fixing region 28 deforms due to the clamping force.
  • the disc-shaped fixing area 28 can, however, be compressed due to the circumferential recess 33, formed in the underside 35 of the fixing region 28, so that the circumferential recess 33 does not hinder the elastic deformation of the fixing region 28 when it is acted upon by the torque of the valve clamping screw 21, but rather that displaced material during clamping.
  • the circumferential recess 33 on the underside 35 of the fixing area 28 favors a flow of the material of the anchor guide 13, so that material is displaced by compression can take place on the underside 35 of the fixing area 28 and the upsetting during the tightening of the fixing area 28 by tightening the valve clamping screw 21 does not lead to the radial constriction 24 shown in FIG.
  • the between the anchor bolt 11 and the guide surface 37 of the anchor guide tion 13 forming lubricant film are preserved, which is represented in fuel injectors, for example, by the fuel.
  • the lubricant is therefore diesel oil. Accordingly, a material displacement occurring on the underside 35 of the fixing area 28 when the valve clamping screw 21 is tightened is intercepted by the circumferential recess 33. As a result, the guide surface 37 facing the anchor bolt 11 on the inside of the component which represents the anchor guide 13 is not or only insignificantly deformed. The material used for the material of the anchor bolt 11 and the anchor guide 13 surrounding it is predominantly lOOCr ⁇ .
  • the valve clamping screw 21, which acts on the fixing area 28 of the armature guide 13 with a defined tightening torque, lies on the upper side 34 of the protruding surface in the fixing area 28 in FIG. 3. With the anchor guide 13 shown in FIG.
  • a radial constriction of 0.0212 ⁇ m can be achieved with a valve clamping screw force of approximately 18 kN.
  • a circumferential recess 33 a plurality of circumferential recesses 33 running concentrically to one another can also be made on the underside 35 of the fixing region 28 of the anchor guide 13.
  • the anchor guide 13 shown in FIG. 3 has a recess 33 on the underside 35 of the fixing region 28, which serves as a relief groove.
  • the circumferential recess 33 can also be introduced on the top side 34 of the fixing region 28, but this is not shown in the drawing.

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)
  • Manufacturing & Machinery (AREA)
  • Fuel-Injection Apparatus (AREA)

Abstract

L'invention concerne un injecteur (1) de carburant doté d'une soupape magnétique (17) qui actionne un module d'induit (10) réalisé en une ou plusieurs pièces et par l'intermédiaire duquel un élément de fermeture (8) est actionné pour délester une chambre pilote (4) de sa pression. Le module d'induit (10) est guidé dans un guide d'induit (13) qui est fixé dans le corps d'injecteur (2) au moyen d'une vis (21) de serrage de soupape. Dans sa zone de fixation (28) dans le corps d'injecteur (2), le guide d'induit (13) présente au moins une découpe périphérique (33).
EP06807272A 2005-12-07 2006-10-16 Guide a deformation optimisee de l'induit de soupapes magnetiques Withdrawn EP1960657A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102005058302A DE102005058302A1 (de) 2005-12-07 2005-12-07 Verformungsoptimierte Ankerführung für Magnetventile
PCT/EP2006/067411 WO2007065752A1 (fr) 2005-12-07 2006-10-16 Guide a deformation optimisee de l'induit de soupapes magnetiques

Publications (1)

Publication Number Publication Date
EP1960657A1 true EP1960657A1 (fr) 2008-08-27

Family

ID=37500005

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06807272A Withdrawn EP1960657A1 (fr) 2005-12-07 2006-10-16 Guide a deformation optimisee de l'induit de soupapes magnetiques

Country Status (5)

Country Link
US (1) US20080290196A1 (fr)
EP (1) EP1960657A1 (fr)
CN (1) CN101321945A (fr)
DE (1) DE102005058302A1 (fr)
WO (1) WO2007065752A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010049035A1 (de) * 2010-10-21 2012-04-26 Kendrion Binder Magnete Gmbh Hochdruckregelventil
DE102010043092A1 (de) * 2010-10-29 2012-05-03 Robert Bosch Gmbh Druckregelventil
DE102011078953A1 (de) * 2011-04-07 2012-10-11 Robert Bosch Gmbh Kraftstoffinjektor
CN104989572B (zh) * 2015-07-20 2018-05-22 无锡威孚高科技集团股份有限公司 用于柴油机的分体式电控单体泵
US11248575B1 (en) * 2020-09-18 2022-02-15 Caterpillar Inc. Fuel injector with internal leak passage to injector drain

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT220661Z2 (it) * 1990-10-31 1993-10-08 Elasis Sistema Ricerca Fita Nel Mezzogiorno Soc.Consortile P.A. Perfezionamenti al sistema di tenuta ad alta pressione della valvola pilota di un iniettore elettromagnetico per sistemi di iniezione del combustibile di motori a combustione interna
IT227711Y1 (it) * 1992-12-29 1997-12-15 Elasis Sistema Ricerca Fiat Valvola di dosaggio a comando elettromagnetico per un iniettore di combustibile
IT1276503B1 (it) * 1995-07-14 1997-10-31 Elasis Sistema Ricerca Fiat Perfezionamenti ad una valvola di dosaggio a comando elettromagnetico, per un iniettore di combustibile.
DE19650865A1 (de) * 1996-12-07 1998-06-10 Bosch Gmbh Robert Magnetventil
IT1289794B1 (it) * 1996-12-23 1998-10-16 Elasis Sistema Ricerca Fiat Perfezionamenti ad una valvola di dosaggio a comando elettromagnetico per un iniettore di combustibile.
DE19708104A1 (de) * 1997-02-28 1998-09-03 Bosch Gmbh Robert Magnetventil
DE19820341C2 (de) * 1998-05-07 2000-04-06 Daimler Chrysler Ag Betätigungsvorrichtung für eine Hochdruck-Einspritzdüse für flüssige Einspritzmedien
IT1310757B1 (it) * 1999-11-30 2002-02-22 Fiat Ricerche Valvola di dosaggio a comando elettromagnetico per un iniettore dicombustibile
DE10123171A1 (de) * 2001-05-12 2002-11-14 Bosch Gmbh Robert Magnetventil zur Steuerung eines Einspritzventils einer Brennkraftmaschine
DE10232718A1 (de) * 2002-07-18 2004-02-05 Robert Bosch Gmbh Ankerbaugruppe für Kraftstoffinjektoren
DE102004013239B4 (de) * 2004-03-18 2015-10-01 Robert Bosch Gmbh Magnetventil mit einstellbarem Ankerhub und Verfahren zur Einstellung desselben

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2007065752A1 *

Also Published As

Publication number Publication date
DE102005058302A1 (de) 2007-06-14
US20080290196A1 (en) 2008-11-27
CN101321945A (zh) 2008-12-10
WO2007065752A1 (fr) 2007-06-14

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