EP1404965A1 - Soupape de commande de liquides - Google Patents

Soupape de commande de liquides

Info

Publication number
EP1404965A1
EP1404965A1 EP02740340A EP02740340A EP1404965A1 EP 1404965 A1 EP1404965 A1 EP 1404965A1 EP 02740340 A EP02740340 A EP 02740340A EP 02740340 A EP02740340 A EP 02740340A EP 1404965 A1 EP1404965 A1 EP 1404965A1
Authority
EP
European Patent Office
Prior art keywords
valve
stop
valve member
stroke
needle
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Withdrawn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
EP02740340A
Other languages
German (de)
English (en)
Inventor
Juergen Stein
Michael Huebel
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 EP1404965A1 publication Critical patent/EP1404965A1/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Withdrawn legal-status Critical Current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
    • 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
    • F02M61/161—Means for adjusting injection-valve lift
    • 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
    • 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
    • F02M2200/304—Fuel-injection apparatus having mechanical parts, the movement of which is damped using hydraulic 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
    • F02M61/04—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
    • F02M61/08—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 opening in direction of fuel flow
    • 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 present invention relates to a valve for dosing or controlling liquid flows or liquids, and in particular to a fuel injection valve for a storage injection system.
  • Valves for controlling liquids are known in different configurations.
  • DE-43 32 124 AI shows a fuel injection valve which has an adjustable stroke limiter for a valve needle.
  • the stroke limitation comprises a limit stop, which is guided displaceably in a guide bore of the fuel injection valve, and an actuator.
  • the actuator is arranged on the stroke limitation in such a way that the position of the stroke limitation is determined by actuation of the actuator.
  • a stroke of the valve needles can thus be changed within a range of approx. 0.1 mm.
  • an adjustable stroke limitation which consists of a ring arranged around the valve needle, in which a through slot is formed.
  • An actuator is arranged in this through-slot, which lengthens when actuated, so that the stroke limitation jams in a guide hole at a specific position.
  • a limit stop can be provided, which enables a stroke adjustment in a very large area.
  • the stroke limits adjustable by piezo actuators can be adjusted individually when the valve is in operation, but their construction is relatively complicated. Furthermore, outward opening valves (A valves), i.e. Valves whose valve member moves out of the valve housing when actuated are known, but which have no stroke stops. In operation, however, can
  • the valve according to the invention for dosing or controlling liquid flows or liquids with the features of claim 1 has the advantage over the fact that the stroke of a valve member is limited to a maximum in the case of an outwardly opening valve.
  • an outwardly opening valve is provided which, for. B. has a piezo actuator for actuating the valve member.
  • the valve member is actuated directly, ie directly mechanically, by the piezo actuator, so that the valve member is controlled by stroke.
  • a stop is provided according to the invention in order to limit the stroke of the valve member.
  • the valve according to the invention is also suitable for engines in which, for reasons of space, the injection valve cannot be installed in the center of the cylinder head. Furthermore, the injection pattern in penetration and jet shape can be adapted to different combustion chambers or different engines by different arrangements of the stop.
  • the stop is preferably designed as a mechanical stop.
  • the mechanical stop particularly preferably consists of an adjusting ring and a clamping piece for fixing the position of the adjusting ring.
  • the valve member In order to have a defined contact point on the valve member, the valve member preferably has a shoulder on which the adjusting ring rests.
  • the adjusting ring and the clamping piece are formed in one piece in order to reduce the number of parts.
  • the adjusting ring preferably has a protrusion in order to determine the maximum stroke of the valve member.
  • the valve member is particularly preferably designed as a valve needle. In order to prevent the valve needle from tipping, it is preferably guided twice in the valve body.
  • the valve member is formed in two parts from a valve needle and a pressure pin.
  • the pressure pin is directly connected to the piezo actuator for actuating the valve member.
  • the clamping piece of the stop is preferably welded to the valve member.
  • the stop device is designed as a hydraulic stop.
  • a different maximum stroke of the valve member can be set in a simple manner, for example, by different fluid filling of the hydraulic stop space. This enables a particularly simple adaptation of the valve to different combustion chambers or engines.
  • the valve according to the invention is particularly preferably used as a fuel injection valve in a storage injection system.
  • a valve in which a stroke limitation stop is provided, which can be particularly easily adapted to different combustion chambers or different engines.
  • the stop is not designed to be adjustable, but the stop is adapted to the different conditions during assembly.
  • the valve according to the invention can thus be constructed in a particularly compact manner and can be arranged in a wide variety of positions in an engine compartment.
  • Figure 1 is a schematic sectional view of a
  • FIG. 2 shows an enlargement of the area of the valve shown in FIG. 1, in which the stop is arranged
  • Figure 3 is a schematic partial sectional view of a
  • Figure 4 is a schematic partial sectional view of a
  • Figure 5 is a schematic partial sectional view of a
  • FIG. 1 and 2 show a fuel injection valve 1 according to a first exemplary embodiment of the present invention.
  • the valve 1 comprises a piezo actuator (not shown) and a valve needle 3.
  • the valve needle 3 is connected directly to a foot 2 of the piezo actuator via a pressure pin 4, so that a so-called stroke control is formed in the valve 1 which the piezo actuator actuates the valve member 3 directly mechanically.
  • the foot of the piezo actuator is applied to the pressure pin 4 by means of a spring element 12, so that there is a positive fit.
  • the valve needle 3 is arranged in a valve body 16 which is connected to a valve holder 17. As shown in FIG. 1, the valve 1 is an outward opening valve in which the valve needle 3 is moved outward from the valve body 16 when actuated. The valve needle 3 closes a valve seat 5 in the non-actuated state. To prevent the valve needle 3 from tilting, a first valve guide 6 and a second valve guide 7 are provided.
  • the first valve guide 6 consists of a plurality of web-like projections which slide on the valve body 16 and have a passage between them.
  • a spring clamping piece 15 is fastened to the pressure pin 4 and serves as a spring seat for a return spring 14.
  • the return spring 14 is supported at its other end on the valve body 16. Fuel is through an inlet channel 18 to an annular gap 19 arranged around the valve needle 3.
  • a stop 8 which, as shown in particular in FIG. 2, comprises an adjusting ring 9 and a clamping piece 10.
  • the clamping piece 10 is firmly connected to the pressure pin 4 via a weld seam 11.
  • the adjusting ring 9 rests on a shoulder 13 of the valve needle 3 and has an annular projection 21, which engages at the transition region between the valve needle 3 and the pressure pin 4 in a recess 22 formed on the pressure pin.
  • a protrusion 23 with a length h 2 is formed on the adjusting ring 9. The adjusting ring 9 thus engages around the end of the valve needle 3 opposite the valve seat 15.
  • the maximum lifting height hi is also shown in FIG.
  • the maximum stroke hi of the valve is determined by the distance between the end face 16a on the valve body 16 and the adjusting ring 9.
  • the valve 1 according to the invention is assembled in such a way that the valve needle 3 is first inserted into the valve body 16 from the front. The distance between the actuator-side end 16a of the valve body 16 and the shoulder 13 of the valve needle 3 is then measured. Depending on this distance between the shoulder 13 and the valve body 16, a suitable adjusting ring 9 with a corresponding overhang h 2 is selected so that a desired maximum stroke hi of the valve is achieved. The adjusting ring 9 is pushed onto the valve needle 3 from behind until it rests on the shoulder 13 of the valve needle 3. Then the clamping piece 10 from behind pushed on and connected to the pressure pin 4 by welding.
  • the return spring 14 and the spring clamp 15 are pushed onto the needle and the return spring 14 is biased via the spring clamp 15 to a desired biasing force.
  • the spring clamp 15 is connected to the pressure pin 4, for example by welding.
  • the valve holder 17 is then pushed onto the valve body 16 and these are connected to one another, for example by welding.
  • the welding point between the valve body 16 and the valve holder 17 is arranged as far as possible at a point which is as far away from the needle guide 7 as possible. This can prevent a negative impact due to any welding distortion that may occur.
  • the piezo actuator If an injection is to take place, the piezo actuator is activated, whereby it expands against the spring force of the spring 12 in the direction of a central axis x-x of the valve. This stroke of the piezo actuator is transmitted to the valve needle 3 via the actuator foot and the pressure pin 4. The pressure pin 4 and the valve needle 3 are firmly connected to one another. As a result, the valve needle 3 lifts off its valve seat 5, so that fuel is injected. The maximum stroke hi of the valve needle 3 is determined by the mechanical stop 8, which is firmly attached to the pressure pin 4.
  • the stop 8 prevents the opening on the valve seat 5 which has been opened by the valve needle 3 changed.
  • the injection quantity is kept constant during operation and the jet angle and penetration are not influenced, which is particularly necessary in the case of jet-guided combustion processes.
  • the piezo actuator When the injection is to be ended, the piezo actuator is activated again so that it shortens. The return spring 14 then presses the valve needle 3 back into its starting position via the spring clamping piece 15 and the pressure pin 4 and closes the valve seat 5. The injection is thus ended.
  • FIG. 3 shows a valve according to a second exemplary embodiment of the present invention.
  • the same or functionally the same parts are denoted by the same reference numerals as in the first embodiment.
  • the stop 8 is formed in one piece in the second exemplary embodiment. That is, instead of the adjusting ring 9 and the clamping piece 10 in the first embodiment, only an annular stop 8 is present.
  • the second exemplary embodiment corresponds to the first exemplary embodiment, so that reference can be made to the description given there.
  • FIG. 4 shows a valve 1 according to a third exemplary embodiment of the present invention.
  • the same or functionally the same parts are the same Reference numerals as in the first and second embodiments.
  • FIG. 5 shows a fourth exemplary embodiment according to the present invention. Identical or functionally identical parts are again identified by the same reference symbols as in the previous exemplary embodiments.
  • the fourth exemplary embodiment essentially corresponds to the third exemplary embodiment, in which no shoulder is provided on the valve needle 3.
  • the connection between the valve body 16 and the valve holder 17 is shown in more detail. As shown in FIG. 5, the valve body 16 and the valve holder 17 are connected to one another via a weld seam 20. It should be noted that a connection by means of a thread could also be provided between the valve body 16 and the valve holder 17.
  • the present invention relates to a valve 1 for controlling liquids with a piezo actuator for actuating a valve member 3, 4, which is Valve member 3, 4 moved out of a valve body 16 upon actuation.
  • a stroke control is formed between the piezo actuator and the valve member 3, 4.
  • the valve also includes a stop device 8 in order to limit the stroke hi of the valve member 3, 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)

Abstract

L'invention concerne une soupape (1) destinée à la commande de liquides au moyen d'un actionneur piézo-électrique destiné à actionner un élément de soupape (3, 4), ledit élément de soupape (3, 4) se déplaçant hors d'un corps de soupape (16) lors d'un actionnement. Une commande de levée est conçue entre l'actionneur piézo-électrique et l'élément de soupape (3, 4). La soupape selon l'invention comporte également un système de butée (8) destiné à limiter la levée h1 De l'élément de soupape (3, 4).
EP02740340A 2001-05-12 2002-05-10 Soupape de commande de liquides Withdrawn EP1404965A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10123218A DE10123218A1 (de) 2001-05-12 2001-05-12 Ventil zum Steuern von Flüssigkeiten
DE10123218 2001-05-12
PCT/DE2002/001703 WO2002092996A1 (fr) 2001-05-12 2002-05-10 Soupape de commande de liquides

Publications (1)

Publication Number Publication Date
EP1404965A1 true EP1404965A1 (fr) 2004-04-07

Family

ID=7684603

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02740340A Withdrawn EP1404965A1 (fr) 2001-05-12 2002-05-10 Soupape de commande de liquides

Country Status (5)

Country Link
US (1) US20040046138A1 (fr)
EP (1) EP1404965A1 (fr)
JP (1) JP2004519612A (fr)
DE (1) DE10123218A1 (fr)
WO (1) WO2002092996A1 (fr)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10305178A1 (de) 2003-02-08 2004-08-19 Robert Bosch Gmbh Verfahren zum Betreiben eines Einspritzventils einer Brennkraftmaschine
DE60310362T2 (de) * 2003-02-20 2007-04-19 Siemens Vdo Automotive S.P.A., Fauglia Dosiervorrichtung und Verfahren zur Einstellung der Federvorspannung
DE10326792B4 (de) 2003-06-13 2005-11-03 Chocotech Gmbh Verfahren und Vorrichtung zur thermischen Behandlung von Süßwarenmasse
DE602004030419D1 (de) * 2004-02-27 2011-01-20 Continental Automotive Italy S P A Flüssigkeitsinjektor
DE102004044153A1 (de) 2004-09-13 2006-03-30 Siemens Ag Hubvorrichtung und Einspritzventil
DE102010042476A1 (de) * 2010-10-14 2012-04-19 Robert Bosch Gmbh Vorrichtung zum Einspritzen von Kraftstoff
DE102012204482A1 (de) 2012-03-21 2013-09-26 Robert Bosch Gmbh Brennstoffeinspritzventil
JP6139191B2 (ja) * 2013-03-14 2017-05-31 日立オートモティブシステムズ株式会社 電磁式燃料噴射弁
WO2018092472A1 (fr) * 2016-11-15 2018-05-24 日立オートモティブシステムズ株式会社 Soupape de réglage de débit

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3533085A1 (de) * 1985-09-17 1987-03-26 Bosch Gmbh Robert Zumessventil zur dosierung von fluessigkeiten oder gasen
DE4332124A1 (de) 1993-09-22 1995-03-23 Bosch Gmbh Robert Kraftstoffeinspritzdüse für Brennkraftmaschinen
US5772181A (en) * 1995-06-01 1998-06-30 Emerson Electric Co. Pivoting valve assembly
DE19640782A1 (de) * 1996-10-02 1998-04-09 Bosch Gmbh Robert Ventil und Verfahren zur Herstellung eines Ventiles
DE19726481A1 (de) * 1997-06-21 1998-12-24 Bosch Gmbh Robert Ventil zum Steuern von Flüssigkeiten
DE19753162A1 (de) * 1997-11-29 1999-06-02 Bosch Gmbh Robert Kraftstoffeinspritzventil für Brennkraftmaschinen
DE19839632A1 (de) * 1998-08-31 2000-03-02 Siemens Ag Kraftstoffeinspritzdüse mit Hubbegrenzung
DE19854508C1 (de) * 1998-11-25 2000-05-11 Siemens Ag Dosiervorrichtung
DE19958705C2 (de) * 1999-12-06 2003-03-13 Siemens Ag Ventil mit verbesserter Anschlaggeometrie
DE10039544A1 (de) * 2000-08-12 2002-04-04 Daimler Chrysler Ag Einspritzventil
DE10039543C2 (de) * 2000-08-12 2003-06-18 Conti Temic Microelectronic Einspritzventil

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO02092996A1 *

Also Published As

Publication number Publication date
DE10123218A1 (de) 2002-11-14
WO2002092996A1 (fr) 2002-11-21
US20040046138A1 (en) 2004-03-11
JP2004519612A (ja) 2004-07-02

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