EP1571328A2 - Soupape d'injection - Google Patents

Soupape d'injection Download PDF

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Publication number
EP1571328A2
EP1571328A2 EP05101340A EP05101340A EP1571328A2 EP 1571328 A2 EP1571328 A2 EP 1571328A2 EP 05101340 A EP05101340 A EP 05101340A EP 05101340 A EP05101340 A EP 05101340A EP 1571328 A2 EP1571328 A2 EP 1571328A2
Authority
EP
European Patent Office
Prior art keywords
nozzle needle
nozzle
gap
injection valve
injection
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Withdrawn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
EP05101340A
Other languages
German (de)
English (en)
Other versions
EP1571328A3 (fr
Inventor
Robert Kuchler
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.)
Siemens AG
Siemens Corp
Original Assignee
Siemens AG
Siemens Corp
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 Siemens AG, Siemens Corp filed Critical Siemens AG
Publication of EP1571328A2 publication Critical patent/EP1571328A2/fr
Publication of EP1571328A3 publication Critical patent/EP1571328A3/fr
Withdrawn legal-status Critical Current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
    • 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
    • F02M45/00—Fuel-injection apparatus characterised by having a cyclic delivery of specific time/pressure or time/quantity relationship
    • F02M45/02—Fuel-injection apparatus characterised by having a cyclic delivery of specific time/pressure or time/quantity relationship with each cyclic delivery being separated into two or more parts
    • F02M45/04—Fuel-injection apparatus characterised by having a cyclic delivery of specific time/pressure or time/quantity relationship with each cyclic delivery being separated into two or more parts with a small initial part, e.g. initial part for partial load and initial and main part for full load
    • F02M45/08—Injectors peculiar thereto
    • F02M45/086—Having more than one injection-valve controlling discharge orifices
    • 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
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/46—Valves, e.g. injectors, with concentric valve bodies
    • 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
    • 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
    • F02M2200/704—Linkage between actuator and actuated element, e.g. between piezoelectric actuator and needle valve or pump plunger hydraulic with actuator and actuated element moving in different directions, e.g. in opposite directions

Definitions

  • the invention relates to an injection valve with a body with a recess in which a Hubumsetzer is arranged with a piston acting on the actuator. Further the injection valve is associated with a nozzle needle, with hydraulically coupled to the piston via a transmission chamber is and is arranged to be in a closed position prevents fluid flow through a first injection nozzle and in an open position fluid flow through the first one Injector releases.
  • Piezo actuators are increasingly being used, due to their very fast response time on control signals very are well suited to precise the metering of fuel control and optionally during a working cycle lake a cylinder of the internal combustion engine several consecutive Allow partial injections.
  • the fluid pressure in an injection valve for diesel internal combustion engines For example, it can be up to 2000 bar.
  • a fuel injection valve is known with a device for transmitting a movement of a Actuator on an actuator.
  • the device has a first Piston element, which is firmly connected to the actuator, and a second piston member fixed to the actuator, So the nozzle needle is connected.
  • a hydraulic chamber educated.
  • a storage chamber via a Throttle gap hydraulically coupled to the hydraulic chamber.
  • the storage chamber are corrugated tubes for elastic pressure compensation assigned.
  • the object of the invention is to provide an injection valve create that is simple and reliable.
  • the invention is characterized by an injection valve with an actuator, with a body with a recess, in a Hubumsetzer is arranged with a piston, on the the actuator acts.
  • the injection valve also has a Nozzle needle connected to the piston via a transmission chamber is hydraulically coupled and arranged so that in a closed position fluid flow through a first injection nozzle stops and in an open position the fluid flow through a first injection nozzle releases.
  • the transmitter chamber is about at least one gap, on the one hand is limited by the piston, with a high pressure circuit of Fluids coupled.
  • a pressure equalizing gap is radially outward formed of the first gap.
  • the pressure equalizing gap is hydraulically coupled to the high pressure circuit of the fluid.
  • the invention is based on the recognition that by the high Pressure in the high pressure circuit, for example, up to 2000 bar can be carried out widening of the first gap can, which can result in a stroke of the actuator only to a lesser extent or in extreme cases no longer transferred to the nozzle needle.
  • the Pressure equalizing gap acts by the pressure in the gap caused force in the radial direction of a corresponding opposing force, which by the pressure in the Pressure equalization gap is caused, and thus prevents a gap widening, leading to a significant deterioration in efficiency during the transmission of the stroke of the actuator would lead to the nozzle needle.
  • the Pressure equalizing gap with an inlet to the first injection nozzle coupled. This has the advantage that through the Pressure equalization gap on the one hand a gap widening of the first On the other hand, gap is effectively prevented at the same time formed by him the inlet to the first injection nozzle is.
  • the piston is designed as a cup-shaped body.
  • a first The nozzle spring is supported on the one hand on the bottom of the pot pot-shaped body on the other hand is on a Face of the nozzle needle on. So the nozzle spring tightens the Nozzle needle in front of its closed position. This is the injection valve particularly compact design.
  • nozzle needle by an axial bore of her Pot bottom facing side at least along part of her penetrated axial extent and by means of the axial Bore is the first injector hydraulic with the high pressure circuit coupled.
  • the nozzle needle is designed as an outer nozzle needle, the a recess is penetrated in the axial direction, and Further, an inner nozzle needle in the recess of the outer Nozzle needle arranged in such a way that they are in one Closed position fluid flow through a second injection nozzle stops and in an open position the fluid flow through the second injector releases. This is easy a compact injection valve formed with register nozzles.
  • the inner nozzle needle has a driver over which they are with the end face of the outer nozzle needle is coupled. So is a simple control of both nozzle needles on the chain of effects Actuator and Hubumsetzer possible. Furthermore, such is one independent opening and closing of the outer nozzle needle possible.
  • the piston is designed as a cup-shaped body.
  • a second nozzle spring is supported on the one hand on the bottom of the pot of the cup-shaped body and on the other hand on one Spring pad of the inner nozzle needle and thus clamps the inner Nozzle needle in front of its closed position. That's it Injection valve designed to be particularly compact.
  • the arrangement of the first and / or second nozzle spring can also independent of the presence of a pressure equalization gap be realized.
  • the inner nozzle needle by an axial bore of hers the pot bottom side facing at least along one part penetrated their axial extent and by means of the axial Hole are the first and / or second injector hydraulic coupled to the high pressure circuit of the fluid. So can the guide of Hubumsetzers simple and reliable respectively.
  • An injection valve has an injector body 1, a nozzle body 2 and a nozzle retaining nut 4.
  • the nozzle body 2 is fastened to the injector housing 1 by means of the nozzle retaining nut 4.
  • the nozzle body 2 and the injector body 1 form so a body.
  • the injector body 1 has a first recess 6 in which a Actuator 8 is arranged.
  • the actuator is as a stroke actuator formed and is preferably a piezo actuator, comprising a stack of piezoelectric elements.
  • the Piezoactuator changes its axial extent depending on one Actuation with a control signal.
  • the actuator However, as another the expert for this Purpose known and designed as suitable known actuator be.
  • the actuator 8 acts via a transformer 10 to a Hubumsetzer a.
  • the Hubumsetzer includes a cup-shaped Body 12, which is arranged in a recess 14 of the nozzle body 2 is and is preferred in this led.
  • the cup-shaped Body 12 protrudes into this embodiment in the first recess 6 of the injector body. 1
  • An outer nozzle needle 16 is connected via a transmission chamber 18th hydraulically coupled to the cup-shaped body 12.
  • the transmitter chamber 18 is by a at the pot edge of the cup-shaped Body 12 formed frontal surface, through a paragraph on the recess 14 of the nozzle body and through limited a paragraph of the outer nozzle needle 16.
  • the outer nozzle needle 16 is in a region of the recess 14 of the nozzle body 2 out. It is also by means of a first nozzle spring 22 biased so that they fluid flow prevented by a first injection nozzle 24, if no further forces acting on the outer nozzle needle 16. For this purpose, the first nozzle spring 22 is biased accordingly.
  • the first nozzle spring 22 is arranged in a high pressure chamber 28, through the pot bottom of the cup-shaped body 12, a portion of its cylindrical pot wall and a End face 30 of the outer nozzle needle 16 is limited.
  • the high pressure chamber 28 is connected to a high pressure circuit of the fluid coupled. It is in a built-in state of the injector coupled with the high pressure circuit.
  • the first nozzle spring 22 is supported on the one hand on the bottom of the pot of the cup-shaped body 12 and on the other hand on the end face 30 of the outer nozzle needle 16. she is pretensioned accordingly and thus exerts on the outer nozzle needle 16 is a force acting in the closing direction.
  • a first gap 26 is between the outer nozzle needle 16 and the pot-shaped body 12 is formed.
  • the gap of the first gap 26 is chosen to be fast short-term Movements of the actuator substantially free of stroke loss can be implemented.
  • the gap of the first Gap 26 chosen sufficiently large to allow thermal and wear-related changes in length in the actuator and compensate him assigned to the transformer 10, the over the operating time of the injector can occur, and while by fluid from the high pressure chamber 28 via the first Gap 26 flows into the transformer chamber 18.
  • a second gap 32 between the cup-shaped Body 12 and the nozzle body 2 is formed.
  • the second gap 32 is as well as the first gap 26 and in particular with regard to on the interaction of the first and second gap 26,32 designed so that its gap dimensioned so small is that fast and short-term positioning movements of the Actuator 8 largely free of Hubhold on the outside Nozzle needle 16 are transferred.
  • the gap is of the second gap 32 selected so that thermal and wear-related changes in length of the actuator 8 and the transformer 10 are compensated.
  • the second gap 32, the transmitter chamber 18 is also coupled to a high-pressure circuit, with which the injection valve can be coupled.
  • a pressure equalizing gap 34 formed and hydraulically with the high circle of the fluid in the installed state of the injector coupled in, for example, an internal combustion engine.
  • the pressure equalizing gap 34 is radially outside the second gap 32 arranged.
  • the outer nozzle needle 16 is complete in the axial direction penetrated by a recess 35 into which an inner nozzle needle 36 is introduced.
  • the inner nozzle needle 36 is by means of a second nozzle spring 38 in a closing direction biased, that is, in their closed position, in which they prevents the fluid flow through a second injection nozzle 40. In its open position, it gives the fluid flow through the second injection nozzle 40 free.
  • the outer nozzle needle 16 Upon actuation of the actuator is continued with axial extent of the actuator 8 first, the outer nozzle needle 16 from its closed position to its open position in which it moves the fluid flow through the first injection nozzle 24 releases. With increasing stroke of the actuator 8 becomes a game between a driver 42, the inner one Nozzle needle 36 is assigned, and an end face 30 of the used up the outer nozzle needle 16, until finally the outer Nozzle needle 16, the inner nozzle needle 36 via the driver 42 entrains and from its closed position to its open position emotional.
  • the inner nozzle needle 36 has a longitudinal bore 44 introduced, of which the inner nozzle needle 36 of her the pot bottom of the pot-shaped body 12 side facing at least along part of its axial extent is penetrated, and in particular in the part of their axial Extension in which they are guided in the outer nozzle needle 16 is.
  • the longitudinal bore 44 opens into a radial bore 46, which is directed radially outward.
  • the fluid, in particular the fuel so can from the high pressure chamber 28 through the longitudinal bore 44 continues through the radial bore 46 and then in the space between the inner nozzle needle 36 and the outer nozzle needle 16 toward the second injection nozzle 40 flow.
  • a further radial bore 48 downstream of the radial bore 46 in the outer nozzle needle 16 is formed, via which then the fluid further through a gap between the outer nozzle needle 16 and the nozzle body 2 toward the first injection nozzle 24 can flow. This allows the fuel to do so be performed favorably that the Hubumsetzer reliable in guided the nozzle body.
  • FIG 2 In a second embodiment of the injection valve (FIG 2) is in contrast to the first embodiment instead of the inner and outer nozzle needle 36, 16 only the outer Nozzle needle 16 present, which then not with the penetrating Recess 35 is provided in the in the first Embodiment of the injection valve, the inner nozzle needle 36th brought in. But you can at least along a section their axial extent of a longitudinal bore 52nd be penetrated, which has a radial bore 54 with a Gap between the outer nozzle needle 16 and the nozzle body 2 is hydraulically coupled and so the gap hydraulically coupled to the high pressure chamber 28.
  • the fuel supply to the first and / or second injection nozzle 24, 40 also by means of a dotted shown further bore 50 in the nozzle body 2, which preferably branches off from the pressure equalizing gap 34.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)
EP05101340A 2004-03-02 2005-02-22 Soupape d'injection Withdrawn EP1571328A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200410010183 DE102004010183A1 (de) 2004-03-02 2004-03-02 Einspritzventil
DE102004010183 2004-03-02

Publications (2)

Publication Number Publication Date
EP1571328A2 true EP1571328A2 (fr) 2005-09-07
EP1571328A3 EP1571328A3 (fr) 2006-06-14

Family

ID=34745349

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05101340A Withdrawn EP1571328A3 (fr) 2004-03-02 2005-02-22 Soupape d'injection

Country Status (2)

Country Link
EP (1) EP1571328A3 (fr)
DE (1) DE102004010183A1 (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006056522A1 (fr) * 2004-11-26 2006-06-01 Robert Bosch Gmbh Injecteur de carburant
EP1837518A1 (fr) * 2006-03-20 2007-09-26 Delphi Technologies, Inc. Dispositif d'amortissement pour un injecteur de carburant
EP1898083A1 (fr) * 2006-09-01 2008-03-12 Robert Bosch Gmbh Injecteur pour une installation à injection de carburant
US7690587B2 (en) 2006-03-20 2010-04-06 Delphi Technologies, Inc. Damping arrangement for a fuel injector
US7699242B2 (en) 2007-03-05 2010-04-20 Denso Corporation Injector
DE102008000511B4 (de) * 2007-03-05 2010-08-26 DENSO CORPORATION, Kariya-shi Injektor
RU2480616C2 (ru) * 2007-06-21 2013-04-27 Роберт Бош Гмбх Управляющий клапан для топливной форсунки

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1111230A2 (fr) 1999-12-22 2001-06-27 Siemens Aktiengesellschaft Dispositif hydraulique pour transmettre le mouvement d'un actuateur

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB9914642D0 (en) * 1999-06-24 1999-08-25 Lucas Ind Plc Fuel injector
DE10133265A1 (de) * 2001-07-09 2003-01-23 Bosch Gmbh Robert Brennstoffeinspritzventil
DE10145620B4 (de) * 2001-09-15 2006-03-02 Robert Bosch Gmbh Ventil zum Steuern von Flüssigkeiten
DE10310788A1 (de) * 2003-03-12 2004-09-23 Robert Bosch Gmbh Brennstoffeinspritzventil und Verfahren zu dessen Montage
DE10326046A1 (de) * 2003-06-10 2004-12-30 Robert Bosch Gmbh Einspritzdüse für Brennkraftmaschinen
DE10336327B4 (de) * 2003-08-07 2016-03-17 Robert Bosch Gmbh Injektor für Kraftstoff-Einspritzsysteme von Brennkraftmaschinen, insbesondere von direkteinspritzenden Dieselmotoren
DE112004001488D2 (de) * 2003-09-10 2006-07-27 Siemens Ag Einspritzventil für die Einspritzung von Kraftstoff in eine Verbrennungskraftmaschine
DE102004005456A1 (de) * 2004-02-04 2005-08-25 Robert Bosch Gmbh Kraftstoffinjektor mit direktgesteuertem Einspritzventilglied

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1111230A2 (fr) 1999-12-22 2001-06-27 Siemens Aktiengesellschaft Dispositif hydraulique pour transmettre le mouvement d'un actuateur

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006056522A1 (fr) * 2004-11-26 2006-06-01 Robert Bosch Gmbh Injecteur de carburant
EP1837518A1 (fr) * 2006-03-20 2007-09-26 Delphi Technologies, Inc. Dispositif d'amortissement pour un injecteur de carburant
JP2007255418A (ja) * 2006-03-20 2007-10-04 Delphi Technologies Inc 燃料インジェクタのための減衰構成
US7690587B2 (en) 2006-03-20 2010-04-06 Delphi Technologies, Inc. Damping arrangement for a fuel injector
EP1898083A1 (fr) * 2006-09-01 2008-03-12 Robert Bosch Gmbh Injecteur pour une installation à injection de carburant
US7699242B2 (en) 2007-03-05 2010-04-20 Denso Corporation Injector
DE102008000511B4 (de) * 2007-03-05 2010-08-26 DENSO CORPORATION, Kariya-shi Injektor
DE102008000301B4 (de) * 2007-03-05 2011-02-03 DENSO CORPORATION, Kariya-shi Injektor
US7931211B2 (en) 2007-03-05 2011-04-26 Denso Corporation Injector
RU2480616C2 (ru) * 2007-06-21 2013-04-27 Роберт Бош Гмбх Управляющий клапан для топливной форсунки

Also Published As

Publication number Publication date
EP1571328A3 (fr) 2006-06-14
DE102004010183A1 (de) 2005-09-29

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