EP1309791A1 - Soupape d'injection de carburant - Google Patents

Soupape d'injection de carburant

Info

Publication number
EP1309791A1
EP1309791A1 EP01960142A EP01960142A EP1309791A1 EP 1309791 A1 EP1309791 A1 EP 1309791A1 EP 01960142 A EP01960142 A EP 01960142A EP 01960142 A EP01960142 A EP 01960142A EP 1309791 A1 EP1309791 A1 EP 1309791A1
Authority
EP
European Patent Office
Prior art keywords
fuel injection
armature
injection valve
valve according
extension
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.)
Granted
Application number
EP01960142A
Other languages
German (de)
English (en)
Other versions
EP1309791B1 (fr
Inventor
Thomas Sebastian
Matthias Boee
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 EP1309791A1 publication Critical patent/EP1309791A1/fr
Application granted granted Critical
Publication of EP1309791B1 publication Critical patent/EP1309791B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • F02M51/00—Fuel-injection apparatus characterised by being operated electrically
    • F02M51/06—Injectors peculiar thereto with means directly operating the valve needle
    • F02M51/061—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means
    • F02M51/0625—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures
    • F02M51/0635—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a plate-shaped or undulated armature not entering the winding
    • F02M51/066—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a plate-shaped or undulated armature not entering the winding the armature and the valve being allowed to move relatively to each other or not being attached to each other
    • 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
    • F02M51/061—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means
    • F02M51/0625—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures
    • F02M51/0635—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a plate-shaped or undulated armature not entering the winding
    • F02M51/0642—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a plate-shaped or undulated armature not entering the winding the armature having a valve attached thereto
    • F02M51/0653—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a plate-shaped or undulated armature not entering the winding the armature having a valve attached thereto the valve being an elongated body, e.g. a needle valve
    • 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
    • F02M51/061—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means
    • F02M51/0625—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures
    • F02M51/0635—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a plate-shaped or undulated armature not entering the winding
    • F02M51/0642—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a plate-shaped or undulated armature not entering the winding the armature having a valve attached thereto
    • F02M51/0653—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a plate-shaped or undulated armature not entering the winding the armature having a valve attached thereto the valve being an elongated body, e.g. a needle valve
    • F02M51/0657—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a plate-shaped or undulated armature not entering the winding the armature having a valve attached thereto the valve being an elongated body, e.g. a needle valve the body being hollow and its interior communicating with the fuel flow

Definitions

  • the invention relates to a fuel injector according to the preamble of the main claim.
  • an electromagnetically actuated fuel injection valve in which an armature interacts with an electrically excitable solenoid for electromagnetic actuation and the stroke of the armature is transmitted to a valve closing body via a valve needle.
  • the valve closing body interacts with a valve seat surface to form a sealing seat.
  • Several fuel channels are provided in the anchor.
  • the armature is reset using a return spring.
  • Magnet coil interacts.
  • the stroke of the armature is transmitted to a valve closing body via a valve needle.
  • a disadvantage of the fuel injection valves known from the abovementioned publications is, in particular, the lack of free flow space for the fuel, which is caused by the arrangement of the valve needle in a recess of the armature is conditioned. This results in large pressure differences between the upper and lower side of the armature, especially during the movement of the armature, since pressure equalization is impeded.
  • the diameter of holes drilled in the armature to allow the fuel to pass through is limited due to the necessary armature pole area and the limited space available.
  • Fuel injector and the resulting viscosity differences causes scatter in the switching times of the fuel injector, which in addition to the extended switching times lead to the metering of unevenly large amounts of fuel.
  • the fuel injector according to the invention with the characterizing features of the main claim has the advantage that the fuel can flow freely through the armature through a large armature bore and the openings which are provided in a cup-shaped extension of the armature.
  • the armature bore has the same diameter as an inner longitudinal opening of the inner pole of the magnet coil.
  • the pressure difference between the top and bottom of the anchor can thus be reduced to an arbitrarily small value.
  • the larger anchor hole can also reduce the effective anchor area and thus reduce the remaining pressure force acting on the anchor. This leads to shorter valve opening times and a reduction in the variation in switching times due to fluctuations in the pressure difference.
  • the pot-shaped extension of the armature can be formed in one piece with it or consist of two separate components.
  • the extension preferably has at least two openings, which accommodates a uniform flow through the extension. However, several or only one opening are also possible. The openings are accordingly separated from one another by an equal number of circular segments of the hollow cylindrical extension.
  • the components corresponding to the implementation of this principle are all arranged downstream of the armature, as a result of which the flow through the armature is not impeded.
  • FIG. 1A shows a schematic section through a first exemplary embodiment of a fuel injector according to the invention
  • FIG. 1B shows a section along the line IB-IB in Fig. 1,
  • Fig. 2 shows a schematic section through a second
  • Fig. 3 shows a schematic section through a third
  • Fig. 1 shows in a section . highly schematic sectional illustration of a longitudinal section through a first exemplary embodiment of a fuel injector 1 according to the invention.
  • the fuel injector 1 has a solenoid 2, which interacts with an armature 3.
  • the magnet coil 2 interacts with an inner pole 4 and an outer pole 5.
  • the outer pole 5 continues on the downstream side in a valve housing 6.
  • the armature 3 has an extension 7 which is of hollow cylindrical design and is arranged on a downstream side 34 of the armature 3.
  • the extension 7 has a base part 24 which closes off the extension 7 on the outflow side.
  • a return spring 9- is arranged in a 'inner recess 8, which is formed in the armature 3 and the extension 7, a return spring 9- is arranged.
  • the return spring 9 is preloaded by an adjusting sleeve 10 inserted into the inner pole 4 in a recess 11 of the inner pole 4.
  • a valve needle 13 is supported on an downstream end 12 of the extension 7.
  • the valve needle 13 is preferably welded to the bottom part 24 of the extension 7.
  • the valve needle 13 has at a downstream end 37 a valve closing body 14 which cooperates with a valve seat surface 16 formed on a valve seat body 15 to form a sealing seat.
  • the fuel injector 1 shown in FIG. 1A is an inwardly opening fuel injector 1.
  • a spray opening 17 is formed in the valve seat body 15.
  • the fuel ' is supplied via a central fuel supply 18, flows through the recess 11 of internal pole 4, and by the recess 8 of the extension 7, and exits through openings 20, which are characterized in more detail in Fig. 1B, from' the extension 7 from.
  • the fuel then flows through the valve housing 6 to the sealing seat.
  • the valve closing body 14 In the idle state of the fuel injection valve 1, the valve closing body 14 is held in sealing contact with the valve seat surface 16 by the pretensioning of the return spring 9. The fuel injector 1 is thus closed. If an excitation current is supplied to the magnet coil 2, the armature 3 is pulled in the direction of the inner pole 4 against the force of the return spring 9 after the magnetic field has built up sufficiently. After passing through an armature stroke predetermined by the size of a working gap 19, the armature 3 strikes an armature stop 22 formed on the inner pole 4 with an armature face 21 that is soaped against inflow. Fuel flows from the central fuel supply 18 through the recesses 11 and 8 and the openings 20 in the direction of the sealing seat.
  • Fig. '1B shows output point in a schematic sectional representation a section through the extension 7 taken along the line IB-IB in Fig. 1A.
  • the extension 7 is hollow cylindrical in its basic form and exists. of several segments 23, preferably at least two, between which there is a corresponding number of openings 20 in the circumferential direction.
  • the one shell part of the extension? forming segments 23 are preferably formed in one piece with the bottom part 24 of the extension 7.
  • the return spring 9 is supported on the bottom part 24.
  • the valve needle 13 is supported on the side of the base part 24 opposite the return spring 9, as described in more detail with reference to FIG. 1A.
  • the fuel which flows in centrally, flows out of the extension 7 through the recess 8 of the extension 7 and through the openings 20.
  • the size of the recess 8 and the openings 20 between the segments 23 ensures that the fuel can flow through the fuel injector 1 without being significantly stowed on the armature 3.
  • the fuel injection valve 1 according to the invention can be operated particularly advantageously if the so-called pre-stroke principle is used.
  • the armature 3 is initially accelerated and undergoes a partial stroke during which the valve needle 13 is not yet taken along. Only after a first armature stop has been reached is the valve needle taken along by suitable devices against the force of a second return spring.
  • the fuel injector 1 is additionally constructed so that the additional components which enable the partial stroke are arranged downstream of the armature 3 in the outflow direction, the magnetic circuit remains unaffected by the partial stroke.
  • the diameter of the inner pole 4 can be be chosen smaller, whereby the effective magnetic pole area and thus the acting magnetic force are increased.
  • FIGS. 2 and 3 Two exemplary embodiments of the fuel injection valve 1 according to the invention in connection with the pre-stroke principle are described in more detail with reference to FIGS. 2 and 3. Corresponding components are provided in FIGS. 2 and 3 with the same reference numerals as in FIG. 1A.
  • FIG. 2 shows a comparison with FIG. 1A somewhat enlarged partial sectional view of a 'second
  • Embodiment of the fuel injector 1 according to the invention Embodiment of the fuel injector 1 according to the invention.
  • the extension 7 of the armature 3 has a recess 25 in the base part 24, which is penetrated by the valve needle 13.
  • the valve needle 13 At its inlet end 36, the valve needle 13 has a flange 26 which has a projecting collar 27.
  • the valve needle 13 is preferably welded to the flange 26, but can also be made in one piece with this.
  • the first return spring 9 is supported on the collar 27 of the flange 26.
  • a second return spring 28 is clamped between the collar 27 and the base part 24.
  • the spring constant of the second return spring 28 is considerably smaller than the spring constant of the first return spring 9 in order to enable the armature 3 to move without the valve needle 13.
  • the first return spring 9 presses the valve needle 13 over the collar 27 of the flange 26 onto the sealing seat.
  • the armature 3 lies on an armature support 29 which is annular in the valve housing 6. If the solenoid 2, not shown in FIG. 2, is energized, the armature 3 moves in the direction of the inner pole 4. At this time, the armature 3 only has to move against the force of the second return spring 28, since the spring constant of the second Return spring 28 is so small, the armature 3 .that in its movement is not significantly inhibited 'is, however, the valve needle 13 remains in the rest ,.
  • the armature strikes 3 with its Zulaufseifigen armature face 21 on the armature stop 22 on the inner pole. 4
  • the fuel injector 1 remains in the open position. If the coil current is switched off, the armature 3 falls from the inner pole 4 due to the force of the first return spring 9 together with the flange 26 and the valve needle 13 which is non-positively connected to the flange 26. The closing movement takes place in one go over the entire stroke, as a result of which the fuel injection valve 1 can be closed quickly.
  • FIG. 3 shows an excerpted, schematic sectional illustration of a third exemplary embodiment of the fuel injector 1 according to the invention in connection with the pre-stroke principle.
  • valve needle 13 in the present exemplary embodiment is designed as a hollow cylinder and thereby takes over the function of the rudimentary extension 7.
  • the valve needle 13 has transverse outflow openings 31.
  • the extension 7 of the armature 3 is designed without a bottom part 24 in the present exemplary embodiment, but is instead ' welded to a sleeve 32 which is penetrated by the valve needle 13.
  • the valve needle 13 has a collar 33 at its inlet-soapy end, which is pressed against the outflow-side armature end face 34 by the second return spring 28, which is clamped between the sleeve 32 and the collar 33.
  • the first return spring 9 is guided in the recess 8 of the armature 3 and is supported on the inlet end 36 of the valve needle 13.
  • the sum of the cross-sectional areas of the transverse outflow openings 31 of the valve needle 13 should be greater than or at least equal to the cross-sectional area of the recess 8 of the armature 3.
  • the armature 3 As in the exemplary embodiment in FIG. 2, first runs through a preliminary stroke which corresponds to a height of the preliminary stroke gap 30 between the sleeve 32 and the collar 33 of the valve needle 13. As soon as the sleeve 32 strikes the collar 33, the armature 3 takes the valve needle 13 against the force of the first return spring 9. After passing through the forward stroke or closing the working gap 19 between the armature end face 21, which is ready for intake and the armature stop 22 of the inner pole 4, the armature 3 strikes the inner pole 4. As long as the solenoid coil 2 is energized, the fuel injector 1 remains in the open position.
  • the armature 3 drops from the inner pole 4 after the magnetic field is sufficiently reduced by the force of the first return spring 9 and the fuel injector 1 is closed.
  • An inner recess 35 of the valve needle 13 is slightly smaller in diameter than the recess 11 of the inner pole 4 or the recess 8 of the armature 3. As a result, a slight back pressure can form on the collar 33, which supports the functioning of the fuel injection valve 1 by making a small contribution to the closing force.
  • the invention is. not limited to the illustrated embodiments and z. B. also applicable for outward opening fuel injection valves 1.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)

Abstract

L'invention concerne une soupape d'injection de carburant (1), notamment pour systèmes d'injection de carburant de moteurs à combustion interne. Cette soupape d'injection comprend une bobine d'excitation (2), un induit (3) sollicité en position de fermeture par un ressort de rappel (9) et un pointeau de soupape (13) communiquant par liaison de force avec l'induit (3) pour actionner un corps de fermeture de soupape (14) qui forme un siège d'étanchéité conjointement avec une surface de siège de soupape (16). L'invention est caractérisée en ce que l'induit (3) comporte un prolongement (7) axial formant une cuvette et doté d'au moins une ouverture (20).
EP01960142A 2000-08-10 2001-08-03 Soupape d'injection de carburant Expired - Lifetime EP1309791B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10039077 2000-08-10
DE10039077A DE10039077A1 (de) 2000-08-10 2000-08-10 Brennstoffeinspritzventil
PCT/DE2001/002961 WO2002012712A1 (fr) 2000-08-10 2001-08-03 Soupape d'injection de carburant

Publications (2)

Publication Number Publication Date
EP1309791A1 true EP1309791A1 (fr) 2003-05-14
EP1309791B1 EP1309791B1 (fr) 2006-06-14

Family

ID=7651995

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01960142A Expired - Lifetime EP1309791B1 (fr) 2000-08-10 2001-08-03 Soupape d'injection de carburant

Country Status (5)

Country Link
US (1) US6857584B2 (fr)
EP (1) EP1309791B1 (fr)
JP (1) JP4838482B2 (fr)
DE (2) DE10039077A1 (fr)
WO (1) WO2002012712A1 (fr)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004024533A1 (de) 2004-05-18 2005-12-15 Robert Bosch Gmbh Brennstoffeinspritzventil
ITBO20050295A1 (it) * 2005-04-29 2006-10-30 Magneti Marelli Powertrain Spa Inietore di carburante con attuatore elettromagnetico
US7779854B2 (en) * 2007-01-12 2010-08-24 Caterpillar Inc Valve member to armature coupling system and fuel injector using same
US8561598B2 (en) * 2008-01-07 2013-10-22 Mcalister Technologies, Llc Method and system of thermochemical regeneration to provide oxygenated fuel, for example, with fuel-cooled fuel injectors
US8387599B2 (en) 2008-01-07 2013-03-05 Mcalister Technologies, Llc Methods and systems for reducing the formation of oxides of nitrogen during combustion in engines
EP2166220B1 (fr) * 2008-09-19 2012-02-29 Continental Automotive GmbH Soupape d'injection
JP4935882B2 (ja) * 2009-03-05 2012-05-23 株式会社デンソー 燃料噴射弁
EP2333297B1 (fr) * 2009-12-11 2013-03-20 Continental Automotive GmbH Ensemble de soupape pour soupape d'injection et soupape d'injection
EP2365205B1 (fr) 2010-03-03 2013-05-15 Continental Automotive GmbH Soupape d'injection
DE102010043097A1 (de) * 2010-10-29 2012-05-03 Robert Bosch Gmbh Druckregelventil
DE102012210424A1 (de) 2012-06-20 2013-12-24 Robert Bosch Gmbh Einspritzventil
US9115325B2 (en) 2012-11-12 2015-08-25 Mcalister Technologies, Llc Systems and methods for utilizing alcohol fuels
JP6264966B2 (ja) * 2014-03-14 2018-01-24 株式会社デンソー 燃料噴射装置
JP5905046B2 (ja) * 2014-04-23 2016-04-20 日立オートモティブシステムズ株式会社 電磁吸入弁を備えた高圧燃料供給ポンプ
WO2017033645A1 (fr) * 2015-08-25 2017-03-02 日立オートモティブシステムズ株式会社 Électrovanne
EP3153700A1 (fr) * 2015-10-08 2017-04-12 Continental Automotive GmbH Ensemble de soupape pour soupape d'injection, une telle soupape et procédé pour assembler ladite soupape

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Publication number Priority date Publication date Assignee Title
DE3408012A1 (de) 1984-03-05 1985-09-05 Gerhard Dipl.-Ing. Warren Mich. Mesenich Elektromagnetisches einspritzventil
JPS6315373A (ja) * 1986-07-05 1988-01-22 Kan Oteru 楽譜五線検出方式
US4946107A (en) * 1988-11-29 1990-08-07 Pacer Industries, Inc. Electromagnetic fuel injection valve
DE4003228A1 (de) * 1990-02-03 1991-08-22 Bosch Gmbh Robert Elektromagnetisch betaetigbares ventil
DE4125155C1 (fr) * 1991-07-30 1993-02-04 Robert Bosch Gmbh, 7000 Stuttgart, De
US5397055A (en) * 1991-11-01 1995-03-14 Paul; Marius A. Fuel injector system
US5544816A (en) * 1994-08-18 1996-08-13 Siemens Automotive L.P. Housing for coil of solenoid-operated fuel injector
US5570842A (en) * 1994-12-02 1996-11-05 Siemens Automotive Corporation Low mass, through flow armature
DE19503821A1 (de) 1995-02-06 1996-08-08 Bosch Gmbh Robert Elektromagnetisch betätigbares Ventil
US5625946A (en) * 1995-05-19 1997-05-06 Siemens Automotive Corporation Armature guide for an electromechanical fuel injector and method of assembly
DE19626576A1 (de) 1996-07-02 1998-01-08 Bosch Gmbh Robert Brennstoffeinspritzventil
JPH10122083A (ja) * 1996-10-15 1998-05-12 Zexel Corp 燃料噴射弁
DE19712589C1 (de) 1997-03-26 1998-06-04 Bosch Gmbh Robert Brennstoffeinspritzventil und Verfahren zur Herstellung einer Ventilnadel eines Brennstoffeinspritzventils
DE19816315A1 (de) * 1998-04-11 1999-10-14 Bosch Gmbh Robert Brennstoffeinspritzventil

Non-Patent Citations (1)

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Title
See references of WO0212712A1 *

Also Published As

Publication number Publication date
JP4838482B2 (ja) 2011-12-14
WO2002012712A1 (fr) 2002-02-14
US20030102386A1 (en) 2003-06-05
DE50110166D1 (de) 2006-07-27
EP1309791B1 (fr) 2006-06-14
DE10039077A1 (de) 2002-02-21
JP2004506130A (ja) 2004-02-26
US6857584B2 (en) 2005-02-22

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