EP1642022B1 - Soupape permettant de commander le passage de liquides - Google Patents

Soupape permettant de commander le passage de liquides Download PDF

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Publication number
EP1642022B1
EP1642022B1 EP04721817A EP04721817A EP1642022B1 EP 1642022 B1 EP1642022 B1 EP 1642022B1 EP 04721817 A EP04721817 A EP 04721817A EP 04721817 A EP04721817 A EP 04721817A EP 1642022 B1 EP1642022 B1 EP 1642022B1
Authority
EP
European Patent Office
Prior art keywords
valve
actuator
ring seal
region
diameter
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 - Fee Related
Application number
EP04721817A
Other languages
German (de)
English (en)
Other versions
EP1642022A1 (fr
Inventor
Dieter Kienzler
Dietmar Schmieder
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 EP1642022A1 publication Critical patent/EP1642022A1/fr
Application granted granted Critical
Publication of EP1642022B1 publication Critical patent/EP1642022B1/fr
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • F02M51/00—Fuel-injection apparatus characterised by being operated electrically
    • F02M51/06—Injectors peculiar thereto with means directly operating the valve needle
    • F02M51/0603—Injectors peculiar thereto with means directly operating the valve needle using piezoelectric or magnetostrictive operating means
    • 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
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B3/00—Engines characterised by air compression and subsequent fuel addition
    • F02B3/06—Engines characterised by air compression and subsequent fuel addition with compression ignition
    • 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
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/21—Fuel-injection apparatus with piezoelectric or magnetostrictive elements
    • F02M2200/215—Piezoelectric or magnetostrictive elements being able to tilt in its housing

Definitions

  • the invention is based on a valve for controlling fluids according to the type defined in more detail in the preamble of patent claim 1.
  • Such a valve is out of the DE 101 40 529 A1 known and used for example in a fuel injection valve, in particular in a common rail injector of a diesel engine of a motor vehicle.
  • A1 known valve comprises a piezoelectric actuator unit having an actuator base and an actuator head.
  • the actuator base is supported by a rounded, annular edge on a conical seat, which is formed on a valve housing.
  • the actuator head acts on a coupler module, the one with the actuator head connected, so-called actuating piston comprises, which is connected via a hydraulic coupler with a so-called actuating piston in operative connection.
  • the actuating piston acts on a valve closing member, which cooperates with a valve seat and by means of which a fluid flow is controllable.
  • an O-ring is mounted in an annular groove in the area of the actuator base.
  • the O-ring is arranged behind the rounded edge, as seen from the actuator head.
  • the assembly formed of the piezoelectric actuator unit and the coupler module forms a valve control unit of the fuel injection valve and serves to control a arranged in an injector module of the fuel injection valve nozzle needle, which cooperates with leading to a combustion chamber of the internal combustion engine injection openings.
  • the actuator foot is biased by a spring sleeve which surrounds the coupler module with a force of about 700 N.
  • a spring sleeve which surrounds the coupler module with a force of about 700 N.
  • the areas of the actuator foot defining the annular groove for the O-ring are arranged in the valve housing with a slight lateral play.
  • the low clearance leads disadvantageously to the fact that the possible rotation of the Aktorfußes is very low, which may not be sufficiently compensated, if necessary, the occurring tolerance-related twists and assembly-related displacements of the actuator head.
  • valve the ball surface of the actuator base is arranged from the actuator head behind the O-ring seal, has the advantage that by appropriate arrangement of the spherical surface compared to the known valve described in the introduction in the ball bearing or the rounded edge, a smaller friction radius can be achieved, which causes a lower resistance moment in the storage area. This leads to tolerance-related Twists and assembly-related displacements of the actuator head to a smaller bending moment, which is exerted on the piezoelectric actuator unit. The friction radius and the occurring bending stresses in the piezoelectric actuator unit can be reduced by up to 50 percent compared to the known valve.
  • the valve according to the invention for controlling fluids forms in particular a valve control unit of a fuel injection valve, in particular of a common rail injector of an internal combustion engine of a motor vehicle.
  • the O-ring seal is slid over an area of reduced diameter of the actuator base.
  • the O-ring seal which preferably has an inner diameter slightly smaller than the diameter of the reduced diameter portion of the actuator root, is thus easy and safe to install because of the risk of O-ring twisting, which disadvantageously results in leaks while the assembly is reduced.
  • FIG. 1 a longitudinal section through a valve according to the invention in a fragmentary view; and FIG. 2 an enlarged view of the in FIG. 1 dashed bordered area II.
  • valve control unit 1 of a fuel injection valve which serves as a common rail injector for the injection of preferably diesel fuel into a combustion chamber of a diesel engine of a motor vehicle, not shown here.
  • the fuel injection valve comprises, in addition to the valve control unit 1, a nozzle module, not shown in detail, in which an axially displaceable nozzle needle is arranged, which is in operative connection with so-called injection openings leading to the combustion chamber of the internal combustion engine.
  • the valve control unit 1 serves to actuate the nozzle needle.
  • the valve control unit 1 comprises a valve housing 2, in which an axially aligned fuel supply channel 3, which leads to the nozzle module, and a receiving space 4 for a piezoelectric actuator unit 5 and a hydraulic coupler module 6 are formed.
  • the piezoelectric actuator module 5 comprises a piezoelectric actuator 7, which is arranged between an actuator base 8 and an actuator head 9.
  • the piezoelectric actuator unit 5 is encapsulated, by means of a tubular sleeve 10 which is fixedly connected to the actuator base 8, and a 9 surrounding Wellbalgmembran 11, which is connected to the sleeve 10 and for receiving an axial bearing of the piezoelectric actuator 7 is designed.
  • the actuating piston is in turn connected to a valve closing member, which cooperates with a valve seat and when actuated a pressure change in a valve control chamber of the nozzle module, whereby the nozzle needle undergoes an axial displacement, so that the injection openings are opened or closed.
  • the coupler module 6 further comprises a spring sleeve 15, by means of which a bias voltage of the piezoelectric actuator module 5 takes place with a force of about 700 N.
  • the actuator foot 8 is designed in a stepped manner and includes a directly to the piezoelectric actuator 7 subsequent, first region 16, whose diameter corresponds approximately to that of the piezoelectric actuator 7 and which merges into a second region 17 of average diameter, which in turn is followed by a third region 18 of reduced diameter.
  • a third region 18 of reduced diameter In the area of reduced diameter, an O-ring seal 20 is pressed or pushed, which rests against the wall of the valve housing 2.
  • the third region 18 of reduced diameter of the actuator base 8 has a diameter D1, which is slightly larger than the inner diameter of the O-ring 20, so that the latter is securely seated on the third region 18 of reduced diameter of the actuator base 18.
  • the piezoelectric actuator 7 a trained as a ball bearing curved surface or spherical surface 21, which is supported on a conical seat 22 which is formed on the valve housing 2.
  • the spherical surface 21 is defined by a radius designated DR radius DR, wherein a tilting of the actuator base 8 via a pivot point X can take place.
  • a gap S is formed, which can be chosen so large that any occurring, tolerance-related rotations and / or assembly-related displacements of the actuator head 9 in the radial direction, in FIG. 1 exemplified by a double arrow marked Y, can be compensated.
  • This is also a small distance A, which is formed between the pivot point X and the transition between a cylindrical portion 23 of reduced diameter of the receiving space 4 and a conical portion 24 of the receiving space 4.

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)
  • Electrically Driven Valve-Operating Means (AREA)

Claims (3)

  1. Soupape de commande de liquides, comprenant une unité d'actionneur piézoélectrique (5), qui présente un pied d'actionnement (8) et une tête d'actionnement (9), qui agit sur un module d'accouplement (6) qui est connecté à un organe de fermeture de soupape qui coopère avec un siège de soupape, le pied d'actionnement (8) s'appuyant par le biais d'une surface sphérique (21) contre un siège sphérique (22) d'un boîtier de soupape (2) et portant à la périphérie un joint torique (20), caractérisée en ce que la surface sphérique (21) du pied d'actionnement (8) est disposée du côté du joint torique (20) opposé à la tête d'actionnement (9).
  2. Soupape selon la revendication 1, caractérisée en ce que le joint torique (20) est poussé sur une région (18) de diamètre réduit (D1) du pied d'actionnement (8).
  3. Soupape selon la revendication 2, caractérisée en ce que le joint torique (20) a un diamètre intérieur qui est légèrement plus petit que le diamètre (D1) de la région (18) de diamètre réduit (D1) du pied d'actionnement (8).
EP04721817A 2003-05-20 2004-03-19 Soupape permettant de commander le passage de liquides Expired - Fee Related EP1642022B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10322673A DE10322673A1 (de) 2003-05-20 2003-05-20 Ventil zum Steuern von Flüssigkeiten
PCT/DE2004/000568 WO2004104404A1 (fr) 2003-05-20 2004-03-19 Soupape permettant de commander le passage de liquides

Publications (2)

Publication Number Publication Date
EP1642022A1 EP1642022A1 (fr) 2006-04-05
EP1642022B1 true EP1642022B1 (fr) 2009-04-15

Family

ID=33441012

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04721817A Expired - Fee Related EP1642022B1 (fr) 2003-05-20 2004-03-19 Soupape permettant de commander le passage de liquides

Country Status (6)

Country Link
US (1) US8091859B2 (fr)
EP (1) EP1642022B1 (fr)
JP (1) JP4537401B2 (fr)
KR (1) KR20060015732A (fr)
DE (2) DE10322673A1 (fr)
WO (1) WO2004104404A1 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004044153A1 (de) * 2004-09-13 2006-03-30 Siemens Ag Hubvorrichtung und Einspritzventil
DE102006012845A1 (de) * 2006-03-21 2007-10-04 Daimlerchrysler Ag Injektor für Speichereinspritzsysteme
DE102007004380A1 (de) 2007-01-29 2008-07-31 Robert Bosch Gmbh Injektor mit piezoelektrischem Aktuator
DE102007006942A1 (de) 2007-02-13 2008-08-14 Robert Bosch Gmbh Injektor mit piezoelektrischem Aktuator
JP4770847B2 (ja) * 2008-02-27 2011-09-14 株式会社デンソー ダイヤフラム装置及びこれを備えた燃料噴射装置
US8608127B2 (en) * 2011-01-24 2013-12-17 Fluke Corporation Piezoelectric proportional control valve
DE102013012444A1 (de) * 2013-07-29 2015-01-29 Astrium Gmbh Ventilanordnung zum Schalten und/oder Regeln eines Medienstroms eines Raumfahrttriebwerks und Raumfahrttriebwerk

Family Cites Families (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0370863A (ja) * 1989-08-09 1991-03-26 Japan Electron Control Syst Co Ltd フューエルインジェクタ
US5094430A (en) * 1991-03-04 1992-03-10 Stec, Inc. Control valve
DE19531652A1 (de) * 1995-08-29 1997-05-07 Bosch Gmbh Robert Kraftstoffeinspritzventil für Brennkraftmaschinen
DE19746143A1 (de) * 1997-10-18 1999-04-22 Bosch Gmbh Robert Ventil zum Steuern von Flüssigkeiten
DE19839125C1 (de) * 1998-08-27 2000-04-20 Siemens Ag Vorrichtung und Verfahren zur Dosierung von Fluid
US6575138B2 (en) * 1999-10-15 2003-06-10 Westport Research Inc. Directly actuated injection valve
US6520423B1 (en) * 2000-03-21 2003-02-18 Delphi Technologies, Inc. Hydraulic intensifier assembly for a piezoelectric actuated fuel injector
US6499467B1 (en) * 2000-03-31 2002-12-31 Cummins Inc. Closed nozzle fuel injector with improved controllabilty
US6568602B1 (en) * 2000-05-23 2003-05-27 Caterpillar Inc Variable check stop for micrometering in a fuel injector
US6363913B1 (en) * 2000-06-09 2002-04-02 Caterpillar Inc. Solid state lift for micrometering in a fuel injector
EP1325224B1 (fr) * 2000-10-11 2006-05-03 Siemens VDO Automotive Corporation Soupape sensible a la pression pour compensateur d'actionneur transistorise
US6354271B1 (en) * 2000-12-11 2002-03-12 Caterpillar Inc. Hydraulically-actuated fuel injector with enhanced peak injection pressure and stepped top intensifier
US6394070B1 (en) * 2000-12-19 2002-05-28 Caterpillar Inc. Dual valve member and fuel injector using same
US6499471B2 (en) * 2001-06-01 2002-12-31 Siemens Automotive Corporation Hydraulic compensator for a piezoelectrical fuel injector
DE10140529A1 (de) 2001-08-17 2003-03-06 Bosch Gmbh Robert Piezoelektrisches Aktormodul
US6749129B2 (en) * 2002-07-31 2004-06-15 Caterpillar Inc Directly controlled fuel injector with sealing against fluid mixing

Also Published As

Publication number Publication date
US8091859B2 (en) 2012-01-10
KR20060015732A (ko) 2006-02-20
DE10322673A1 (de) 2004-12-09
WO2004104404A1 (fr) 2004-12-02
US20060278837A1 (en) 2006-12-14
JP4537401B2 (ja) 2010-09-01
EP1642022A1 (fr) 2006-04-05
JP2006529013A (ja) 2006-12-28
DE502004009360D1 (de) 2009-05-28

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