EP1472451B1 - Brennstoffeinspritzventil - Google Patents

Brennstoffeinspritzventil Download PDF

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Publication number
EP1472451B1
EP1472451B1 EP02792621A EP02792621A EP1472451B1 EP 1472451 B1 EP1472451 B1 EP 1472451B1 EP 02792621 A EP02792621 A EP 02792621A EP 02792621 A EP02792621 A EP 02792621A EP 1472451 B1 EP1472451 B1 EP 1472451B1
Authority
EP
European Patent Office
Prior art keywords
fuel injection
injection valve
lid
valve according
pot
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 - Lifetime
Application number
EP02792621A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1472451A1 (de
Inventor
Ferdinand Reiter
Martin Maier
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 EP1472451A1 publication Critical patent/EP1472451A1/de
Application granted granted Critical
Publication of EP1472451B1 publication Critical patent/EP1472451B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • F02M61/167—Means for compensating clearance or thermal expansion
    • 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
    • F02M2200/90—Selection of particular materials
    • F02M2200/9084—Rheological fluids
    • 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

Definitions

  • the invention relates to a fuel injection valve according to the preamble of claim 1.
  • a path transformer for a piezoelectric actuator in which the actuator transmits a lifting force to a master cylinder, which is closed by a cylinder carrier.
  • a slave piston In this master cylinder, a slave piston is guided, which also closes the master cylinder and thereby forms the hydraulic chamber.
  • a spring In the hydraulic chamber, a spring is arranged, which presses apart the master cylinder and the slave piston.
  • the slave piston mechanically transfers a lifting movement to, for example, a valve needle.
  • electrorheological fluid in a fuel injection valve which has a valve connected to the valve needle of the fuel injection valve damping element for modeling the injection curve or the injected fuel quantity, which upon excitation or deenergization of the electromagnet, a flow of electrorheological fluid in a damping chamber via a capacitive component causes.
  • the viscosity of the electrorheological fluid can be changed by means of the capacitive component such that the movement of the damping element takes place in such a way that the fuel sprayed off via the spray opening assumes a desired beam shape or in the desired manner in time is hosed.
  • the use of the rheological fluid for a compensation element for piezoelectric or magnetostrictive actuators is not described there.
  • the fuel injector according to the invention with the features of the independent claim 1 has the advantage that a closed, filled with a rheological fluid compensation element downstream of the piezoelectric or magnetostrictive actuator is arranged, which compensates on the one hand, the slow thermal expansion of the different components of a fuel injection valve and on the other hand fast switching movements of the actuator transmits as opening pulse on the valve needle.
  • the compensation element is formed from a pot and a lid, wherein the pot is rigid and the lid is flexible.
  • the lid is provided with beads which improve the elastic deformability of the lid.
  • a further advantage is that the pot of the compensating element is easy to produce by deep drawing.
  • the lid can be hermetically connected to the pot after filling, so that the filled compensating element can be mounted in a simple manner as a total component in the fuel injection valve.
  • FIG. 1 illustrated embodiment of a fuel injection valve 1 according to the invention is carried out in the form of a fuel injection valve 1 for fuel injection systems of mixture-compression, spark-ignited internal combustion engines.
  • the fuel injection valve 1 is suitable in particular for the direct injection of fuel into a combustion chamber, not shown, of an internal combustion engine.
  • the fuel injection valve 1 comprises an actuator 2, which is constructed, for example, of piezoelectric layers 3.
  • the actuator 2 is encapsulated in a housing 4, on which the actuator 2 is supported on the front side.
  • an actuating element 5 is arranged, which is stamp-shaped and rests against a compensating element 6.
  • a detailed description of the compensating element 6 and its operation are the description to Fig. 2 refer to.
  • a valve needle 7 Downstream of the compensating element 6, a valve needle 7 is arranged, with which a support disk 8 is non-positively connected. Between the support plate 8 and a housing shoulder 9, a return spring 10 is arranged, which acts on the valve needle 7 so that a connected to the valve needle 7 valve closing body 11 is held in sealing engagement with a valve seat surface 12, which at one in the embodiment with the housing 4 of the Fuel injection valve 1 integrated valve seat body 17 is formed.
  • the fuel injection valve 1 is energized via an electrical line, not shown, expand the piezoelectric layers 3 of the actuator 2, whereby the actuator body 5, the compensation element 6 and the valve needle 7 are moved against the force of the return spring 10 in the outflow direction.
  • the standing with the valve needle 7 in operative connection valve closing body 11 lifts off from the valve seat surface 12, whereby fuel is injected into the combustion chamber of the internal combustion engine, not shown.
  • the piezoelectric layers 3 contract, whereby the return spring 10 moves the valve needle 7 by pressure on the support disk 8 against the outflow direction.
  • the valve closing body 11 sets on the valve seat surface 12, whereby the fuel injection valve 1 is closed.
  • Fig. 2 shows in an enlarged, schematic view the in Fig. 1 with II designated cutout in the area of the compensation element. 6
  • the compensation element 6 has the task of compensating for slow changes in length due to thermal influences, in particular of the actuator 2, so that the valve closing body 11 does not lift off the valve seat surface 12 due to the slow thermal expansion of the actuator 2. Rapid changes in length of the actuator 2 by energizing to switch the fuel injection valve 1, however, are to be transferred to the valve needle 7.
  • the stamp-shaped actuating element 5 is supported on the inlet side, while the valve needle 7 bears against the cover 14.
  • the Pot 13 is filled with a rheological fluid 15 before closing, before the lid 14 is put on and the pot 13 is hermetically sealed.
  • the thickness of the material of the pot 13 is preferably selected so that the pot 13 is rigid, while the material of the lid 14 is thinner and thus more flexible chosen.
  • beads 16 may be provided which are, for example, annularly mounted on the lid 14. Due to the flexibility of the lid 14, it is possible that this is reversibly elastically deformed when heat different components of the fuel injection valve 1 by the thermal load during operation of the internal combustion engine and thereby undergo a change in length.
  • the entrapped rheological fluid 15 behaves at a slow strain rate like a liquid, i. H. the lid 14 is pressed by the counteracting forces of the expanding actuator 2 and the return spring 10 in the pot 13, so that the fuel injection valve 1 remains closed despite the thermal change in length.
  • the rheological fluid 15 behaves at high operating speed, ie in the energization of the actuator 2 for opening the fuel injection valve 1, such as a solid, so that the compensation element 6 reacts stiffly and transmits the stroke of the actuator 2 to the valve needle 7.
  • the compensating element 6 has the particular advantage that the compensation element 6 is simple and inexpensive to produce.
  • the compensating element 6 also has the advantage over a hydraulic coupler, that the functional scope of the piezoelectric actuator 2 is not limited. While in a hydraulic coupler, the coupling medium escapes between the pistons in two rapidly successive pulses and the time for the return flow is too short, the compensating element 6 with the rheological fluid 15 on react as quickly as desired successive opening pulses.
  • the invention is not limited to the illustrated embodiment and z. B. also suitable for magnetostrictive actuators 2 and for any other construction of fuel fine injection valves 1, which fall within the scope of the present invention, as defined in the appended claims.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)
EP02792621A 2002-01-30 2002-11-29 Brennstoffeinspritzventil Expired - Lifetime EP1472451B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10203659 2002-01-30
DE10203659A DE10203659A1 (de) 2002-01-30 2002-01-30 Brennstoffeinspritzventil
PCT/DE2002/004386 WO2003064846A1 (de) 2002-01-30 2002-11-29 Brennstoffeinspritzventil

Publications (2)

Publication Number Publication Date
EP1472451A1 EP1472451A1 (de) 2004-11-03
EP1472451B1 true EP1472451B1 (de) 2008-03-26

Family

ID=7713422

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02792621A Expired - Lifetime EP1472451B1 (de) 2002-01-30 2002-11-29 Brennstoffeinspritzventil

Country Status (6)

Country Link
US (1) US6932278B2 (https=)
EP (1) EP1472451B1 (https=)
JP (1) JP4456872B2 (https=)
KR (1) KR100942670B1 (https=)
DE (2) DE10203659A1 (https=)
WO (1) WO2003064846A1 (https=)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE50305852D1 (de) * 2002-04-04 2007-01-11 Siemens Ag Einspritzventil
DE10342772A1 (de) * 2003-09-16 2005-04-21 Bosch Gmbh Robert Brennstoffeinspritzventil
DE10342771A1 (de) * 2003-09-16 2005-04-21 Bosch Gmbh Robert Brennstoffeinspritzventil
DE10343086A1 (de) * 2003-09-17 2005-05-19 Robert Bosch Gmbh Brenntoffeinspritzventil
DE102004026171B4 (de) * 2004-05-28 2010-05-20 Continental Automotive Gmbh Einspritzventil
DE102006012917B4 (de) * 2006-03-13 2009-03-19 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Element zur Übertragung von Kräften
DE102006019404A1 (de) * 2006-04-24 2007-10-25 Siemens Ag Druckregler für gasförmige Medien
EP2141347A1 (en) * 2008-07-03 2010-01-06 Continental Automotive GmbH Thermal compensation arrangement
DE102010019670B4 (de) 2010-05-07 2016-01-28 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Betätigungseinheit mit einem Aktor
US20130068200A1 (en) * 2011-09-15 2013-03-21 Paul Reynolds Injector Valve with Miniscule Actuator Displacement
DE102011084512A1 (de) * 2011-10-14 2013-04-18 Robert Bosch Gmbh Hydraulischer Koppler
DE102012202909A1 (de) 2012-02-27 2013-08-29 Robert Bosch Gmbh Ventil zum Zumessen von Fluid
WO2019171593A1 (ja) * 2018-03-09 2019-09-12 株式会社フジキン バルブ装置

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4700678A (en) * 1986-09-08 1987-10-20 Elliott George D Fuel injector
US5063898A (en) * 1986-09-08 1991-11-12 Elliott George D Pulsed hydraulically-actuated fuel injector ignitor system
US4955340A (en) * 1986-09-08 1990-09-11 Elliott George D Electronic controller for compression-actuated fuel injector system
US5103779A (en) * 1989-04-18 1992-04-14 Hare Sr Nicholas S Electro-rheological valve control mechanism
US5019119A (en) * 1989-04-18 1991-05-28 Hare Sr Nicholas S Electro-rheological fuel injector
EP0477400B1 (de) 1990-09-25 2000-04-26 Siemens Aktiengesellschaft Anordnung für einen in Hubrichtung wirkenden adaptiven, mechanischen Toleranzausgleich für den Wegtransformator eines piezoelektrischen Aktors
DE19714292C2 (de) * 1997-04-07 2000-10-26 Siemens Ag Vorrichtung zur Übertragung einer Auslenkung eines Aktors
DE19732232A1 (de) * 1997-07-26 1999-01-28 Eaton Controls Gmbh Lenkstockschalter
DE19735232A1 (de) 1997-08-14 1999-02-18 Bosch Gmbh Robert Verfahren zur Dämpfung eines Brennstoffeinspritzventiles und Brennstoffeinspritzventil
DE19919313B4 (de) * 1999-04-28 2013-12-12 Robert Bosch Gmbh Brennstoffeinspritzventil
DE19942816A1 (de) 1999-09-08 2001-03-22 Daimler Chrysler Ag Einspritzventil
DE19954864A1 (de) * 1999-11-15 2001-05-23 Bosch Gmbh Robert Steuerventil sowie mit einem solchen Steuerventil versehenes Kraftstoff-Einspritzventil
DE19958704C2 (de) 1999-12-06 2002-10-02 Siemens Ag Vorrichtung zum Übertragen einer Aktorbewegung und Fluiddosierer mit einer solchen Vorrichtung
US6991187B2 (en) 2000-11-13 2006-01-31 Siemens Automotive Corporation Magneto-hydraulic compensator for a fuel injector

Also Published As

Publication number Publication date
DE50211993D1 (de) 2008-05-08
KR100942670B1 (ko) 2010-02-17
DE10203659A1 (de) 2003-07-31
US20040159722A1 (en) 2004-08-19
WO2003064846A1 (de) 2003-08-07
JP4456872B2 (ja) 2010-04-28
EP1472451A1 (de) 2004-11-03
JP2005516155A (ja) 2005-06-02
US6932278B2 (en) 2005-08-23
KR20040077904A (ko) 2004-09-07

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