EP1125055A1 - Soupape pour la commande de liquides - Google Patents

Soupape pour la commande de liquides

Info

Publication number
EP1125055A1
EP1125055A1 EP00960338A EP00960338A EP1125055A1 EP 1125055 A1 EP1125055 A1 EP 1125055A1 EP 00960338 A EP00960338 A EP 00960338A EP 00960338 A EP00960338 A EP 00960338A EP 1125055 A1 EP1125055 A1 EP 1125055A1
Authority
EP
European Patent Office
Prior art keywords
valve
piezo actuator
piston
lever
hydraulic
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Withdrawn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
EP00960338A
Other languages
German (de)
English (en)
Inventor
Friedrich Boecking
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 EP1125055A1 publication Critical patent/EP1125055A1/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Withdrawn legal-status Critical Current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
    • F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
    • F02M59/20—Varying fuel delivery in quantity or timing
    • F02M59/36—Varying fuel delivery in quantity or timing by variably-timed valves controlling fuel passages to pumping elements or overflow passages
    • F02M59/366—Valves being actuated electrically
    • 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
    • F02M57/00—Fuel-injectors combined or associated with other devices
    • F02M57/02—Injectors structurally combined with fuel-injection pumps
    • 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
    • F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
    • F02M59/44—Details, components parts, or accessories not provided for in, or of interest apart from, the apparatus of groups F02M59/02 - F02M59/42; Pumps having transducers, e.g. to measure displacement of pump rack or piston
    • F02M59/46—Valves
    • F02M59/466—Electrically operated valves, e.g. using electromagnetic or piezoelectric operating means
    • F02M59/468—Electrically operated valves, e.g. using electromagnetic or piezoelectric operating means using piezoelectric 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
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/70—Linkage between actuator and actuated element, e.g. between piezoelectric actuator and needle valve or pump plunger
    • F02M2200/701—Linkage between actuator and actuated element, e.g. between piezoelectric actuator and needle valve or pump plunger mechanical
    • 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
    • F02M2200/70—Linkage between actuator and actuated element, e.g. between piezoelectric actuator and needle valve or pump plunger
    • F02M2200/703—Linkage between actuator and actuated element, e.g. between piezoelectric actuator and needle valve or pump plunger hydraulic

Definitions

  • the invention relates to a valve for controlling liquids according to the preamble of claim 1.
  • Such a valve is described in EP-0 477 400 AI.
  • an actuating piston of the valve member is slidably arranged in a part of the stepped bore with a small diameter in a stepped bore of the valve housing.
  • a larger piston movable by a piezo actuator is arranged in part of the stepped bore with a larger diameter.
  • a hydraulic pressure chamber filled with a pressure medium is formed between the two pistons, so that a hydraulic translation of a movement of the piezo actuator takes place.
  • split hydraulic translators have been used for some time. With these divided translators, two hydraulic translators are connected in series so that their gear ratios can be added up. As a result, the requirements for each individual hydraulic translator are to be classified lower, so that the specified transmission ratio, approximately 1: 8, is nevertheless maintained even with external influences. On the other hand, these split hydraulic translators have shown a sensitivity to vibration, which in turn leads to inaccuracy.
  • the valve according to the invention with the characterizing features of claim 1 has the advantage that the combination of hydraulic and mechanical translator solves the vibration problem in a simple form, since the hydraulic translator no longer has to be divided. At the same time, the hydraulic translator takes over the temperature compensation between the piezo actuator and the housing, so that the usual disadvantages of temperature changes are compensated for with purely mechanical translators.
  • the valve according to the invention for controlling liquids can thus achieve a uniform repeatability of the injections, so that exactly defined injection times and / or injection quantities of fuel can be guaranteed.
  • a mechanical translator is simple and inexpensive to produce, so that there are advantages with regard to a second hydraulic translator.
  • the mechanical translator does not have any problems with trashing hydraulic fluid, so that the maintenance effort in relation to a second hydraulic translator is considerably reduced.
  • the mechanical translator can have a lever which transmits the stroke of the piston element to the valve member. Levers are simple and inexpensive to manufacture and lead to a robust embodiment of the valve.
  • the lever is advantageously mounted on a support which divides the lever into two lever arms. This is a simple form
  • the piston element is preferably designed as a push rod.
  • Push rods are common components in the present field of art, which are simple and inexpensive to manufacture.
  • the transmission surface of the push rod and the assigned surface of the piezo actuator cause a transmission ratio from 2: 1.
  • This low transmission ratio of the hydraulic translator ensures a low sensitivity to vibrations of the hydraulic translator.
  • this gear ratio with the specified lever arm length ratio of 4: 1 adds up to a total gear ratio of 8: 1, so that the desired gear ratio is achieved without vibration problems.
  • a piston assigned to the piezo actuator can be arranged between the pressure chamber and the piezo actuator.
  • this piston transmits the linear expansion from that of the piezo actuator to the push rod and, on the other hand, means that the piezo actuator does not come into contact with the hydraulic fluid.
  • the transition area between the piezo actuator and the associated piston is sealed with a sealing element.
  • FIG. 1 shows a schematic sectional view of a fuel injection valve according to a first exemplary embodiment of the invention.
  • FIG. 2 shows a schematic sectional view of a fuel injection valve according to a second exemplary embodiment of the present invention. Description of the embodiments
  • the valve according to the invention is used in an injection system in which the injection pump and the injection nozzle form a unit (so-called pump-nozzle unit (PDE)).
  • PDE pump-nozzle unit
  • FIG. 1 An injection system is shown in FIG. 1.
  • the injection valve 1 consists of a pump unit 2 and a control unit 3.
  • the control unit 3 comprises a piezo actuator 5 arranged in a housing 4.
  • the piezo actuator 5 is connected to a hydraulic pressure chamber 7 via a piston 6.
  • the piezo actuator 5 is biased by a biasing spring 8 against the housing 4 and a sealing element 9 is arranged at the transition area between the piston 6 and the piezo actuator 5 such that the
  • Piezo actuator is not exposed to the fluid in the hydraulic pressure chamber 7.
  • a pressure rod 10 with an end region 11 connects to the pressure chamber 7 at a 90 ° angle to the piston 6.
  • the pressure rod 10 including the pressure chamber 7 and piston 6 form the hydraulic translator.
  • the transmission ratio results from the ratio of the transmission surfaces 12 of the pressure rod 10 and the transmission surface 13 of the piston 6.
  • the respective diameter d1 of the piston 6a and the diameter d2 of the pressure rod 10 can of course also be used ,
  • a gear ratio of 1: 2 from the piston 6 to the push rod 10 has been found to be particularly advantageous.
  • the longitudinal extension planes of the piston 6 as well as the push rod 10 do not have to be at right angles to one another, but can also be aligned with one another or assume other angular shapes, depending on the space requirements.
  • the lower end 14 in FIG. 1 of the push rod 10 is in contact with a spherical surface of a lever 15.
  • the lever 15 rests on a support 16 of the housing 4 and is divided into a short lever arm B and a long lever arm A by this bearing.
  • the lever 15 forms the mechanical translator and the two lever arms A, B determine the transmission ratio.
  • a transmission ratio of 4: 1 has emerged as particularly preferred.
  • the second end 17 of the lever 15 is biased by a spring 18 against a control valve 18 and is in the idle state of the piezo actuator 5 and the associated idle states of the piston 6, the push rod 10 and the lever 15 in the open position.
  • control valve 18 is connected in a conventional manner to a further piston 19 together with two springs 20 and 21 and a nozzle 22. Furthermore, a high-pressure bore 23 is also provided for the conduction of the pressure to the nozzle 22, which is built up in a control chamber 24 by a piston 25, which in turn is driven by a cam, not shown.
  • the embodiment of the valve according to the invention for controlling liquids with a piezo actuator 5 shown in FIG. 2 differs from that of FIG. 1 in that not the left end 17 of the lever 15 in FIG. 1, but the right end in FIG. 2 14 of the lever 15 is biased by the spring 18 in the rest position.
  • the springs 20 and 21 are arranged spatially separate from one another and the fuel line 23 does not run directly from the pressure chamber 24 to the nozzle, but instead extends to the nozzle following the control valve 18.
  • the present invention can of course also be used in valves of a different design with a hydraulic and mechanical translator.

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)
  • Fuel-Injection Apparatus (AREA)
  • Electrically Driven Valve-Operating Means (AREA)

Abstract

L'invention concerne une soupape pour la commande de liquides, qui comporte un actionneur piézo-électrique (5) et un intensificateur de pression hydraulique transmettant la course de l'actionneur piézo-électrique (5). L'intensificateur de pression hydraulique comprend une chambre de pression (7) et un élément piston (10) avec une surface d'intensification de pression (12). Il permet d'actionner un élément de soupape (18) relié à l'élément piston (10). Un intensificateur de pression mécanique est, en outre, monté entre l'intensificateur de pression hydraulique et l'élément de soupape (18).
EP00960338A 1999-08-20 2000-08-01 Soupape pour la commande de liquides Withdrawn EP1125055A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19939523 1999-08-20
DE19939523A DE19939523B4 (de) 1999-08-20 1999-08-20 Ventil zum Steuern von Flüssigkeiten
PCT/DE2000/002536 WO2001014732A1 (fr) 1999-08-20 2000-08-01 Soupape pour la commande de liquides

Publications (1)

Publication Number Publication Date
EP1125055A1 true EP1125055A1 (fr) 2001-08-22

Family

ID=7919031

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00960338A Withdrawn EP1125055A1 (fr) 1999-08-20 2000-08-01 Soupape pour la commande de liquides

Country Status (6)

Country Link
US (1) US6531712B1 (fr)
EP (1) EP1125055A1 (fr)
JP (1) JP2003507653A (fr)
KR (1) KR20010080230A (fr)
DE (1) DE19939523B4 (fr)
WO (1) WO2001014732A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103557196A (zh) * 2013-11-14 2014-02-05 山推楚天工程机械有限公司 一种用于混凝土臂架泵车的双泵双向合流阀组及应用

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4562835B2 (ja) * 1999-11-05 2010-10-13 株式会社半導体エネルギー研究所 半導体装置の作製方法
DE10023236A1 (de) * 2000-05-12 2001-11-22 Bosch Gmbh Robert Gestreckte Pumpen-Ventil-Düseneinheit mit hydraulisch-mechanischer Übersetzung
DE10044389A1 (de) * 2000-09-08 2002-04-04 Bosch Gmbh Robert Ventil zum Steuern von Flüssigkeiten
DE10104017C1 (de) * 2001-01-31 2002-06-13 Bosch Gmbh Robert Ventil zum Steuern von Flüssigkeiten
DE10201470A1 (de) * 2002-01-16 2003-08-07 Bosch Gmbh Robert Doppeltschaltendes Ventil für Kraftstoffeinspritzanlagen
DE10304240A1 (de) 2003-02-03 2004-10-28 Volkswagen Mechatronic Gmbh & Co. Kg Vorrichtung zum Übertragen einer Auslenkung eines Aktors
DE102006031567A1 (de) 2006-07-07 2008-01-10 Siemens Ag Einspritzsystem und Verfahren zum Herstellen eines Einspritzsystems
US8074625B2 (en) 2008-01-07 2011-12-13 Mcalister Technologies, Llc Fuel injector actuator assemblies and associated methods of use and manufacture
DE102010051742A1 (de) 2010-11-19 2012-05-24 Christoph Miethke Hebelventil mit Piezo-Aktor-Antrieb
US20140131466A1 (en) 2012-11-12 2014-05-15 Advanced Green Innovations, LLC Hydraulic displacement amplifiers for fuel injectors
US9309846B2 (en) 2012-11-12 2016-04-12 Mcalister Technologies, Llc Motion modifiers for fuel injection systems
US9803555B2 (en) * 2014-04-23 2017-10-31 General Electric Company Fuel delivery system with moveably attached fuel tube
GB201520124D0 (en) * 2015-11-16 2015-12-30 Delphi Internat Operations Luxembourg S À R L Fuel injector

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US4022166A (en) 1975-04-03 1977-05-10 Teledyne Industries, Inc. Piezoelectric fuel injector valve
US5129489A (en) * 1989-10-20 1992-07-14 Nippondenso Co., Ltd., 1-1 Hydraulically operated displacement transmission mechanism for shock absorber with variable damping force
US4971288A (en) * 1989-10-20 1990-11-20 General Signal Corporation Valve actuator with hydraulic damper
JPH03163280A (ja) * 1989-11-20 1991-07-15 Nippondenso Co Ltd 積層型圧電体装置
EP0477400B1 (fr) * 1990-09-25 2000-04-26 Siemens Aktiengesellschaft Dispositif compensateur de tolérance dans la direction de mouvement du transformateur de déplacement d'un dispositif d'actionnement piézoélectrique
US5417142A (en) * 1992-12-18 1995-05-23 Caterpillar Inc. Hydraulic amplifier
JP3740733B2 (ja) 1996-02-13 2006-02-01 いすゞ自動車株式会社 内燃機関の燃料噴射装置
DE19724637A1 (de) 1997-06-11 1998-12-17 Bosch Gmbh Robert Einspritzventil
US6607178B1 (en) * 1997-09-29 2003-08-19 Siemens Aktiengesellschaft Thrust device, fuel injection valve having such a device, and method for manufacturing a thrust transfer element
DE19857615C1 (de) * 1998-12-14 2000-07-13 Siemens Ag Hebelübersetzer

Non-Patent Citations (1)

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Title
See references of WO0114732A1 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103557196A (zh) * 2013-11-14 2014-02-05 山推楚天工程机械有限公司 一种用于混凝土臂架泵车的双泵双向合流阀组及应用
CN103557196B (zh) * 2013-11-14 2015-09-02 山推楚天工程机械有限公司 一种用于混凝土臂架泵车的双泵双向合流阀组及应用

Also Published As

Publication number Publication date
JP2003507653A (ja) 2003-02-25
DE19939523A1 (de) 2001-03-29
US6531712B1 (en) 2003-03-11
WO2001014732A1 (fr) 2001-03-01
KR20010080230A (ko) 2001-08-22
DE19939523B4 (de) 2004-02-26

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