EP1299638B1 - Soupape d'injection de carburant - Google Patents

Soupape d'injection de carburant Download PDF

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Publication number
EP1299638B1
EP1299638B1 EP01989419A EP01989419A EP1299638B1 EP 1299638 B1 EP1299638 B1 EP 1299638B1 EP 01989419 A EP01989419 A EP 01989419A EP 01989419 A EP01989419 A EP 01989419A EP 1299638 B1 EP1299638 B1 EP 1299638B1
Authority
EP
European Patent Office
Prior art keywords
swirl
fuel injection
injection valve
fuel
membrane
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
EP01989419A
Other languages
German (de)
English (en)
Other versions
EP1299638A1 (fr
Inventor
Fevzi Yildirim
Guenther Hohl
Michael Huebel
Norbert Keim
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 EP1299638A1 publication Critical patent/EP1299638A1/fr
Application granted granted Critical
Publication of EP1299638B1 publication Critical patent/EP1299638B1/fr
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
    • F02M51/061—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
    • F02M51/0664—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a cylindrically or partly cylindrically shaped armature, e.g. entering the winding; having a plate-shaped or undulated armature entering the winding
    • F02M51/0671—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a cylindrically or partly cylindrically shaped armature, e.g. entering the winding; having a plate-shaped or undulated armature entering the winding the armature having an elongated valve body attached thereto
    • 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
    • F02M61/162—Means to impart a whirling motion to fuel upstream or near discharging 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
    • 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
    • F02M61/18—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for
    • F02M61/1806—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for characterised by the arrangement of discharge orifices, e.g. orientation or size

Definitions

  • the invention is based on a fuel injector according to the genus of the main claim.
  • DE 197 36 682 A1 describes a fuel injector for injecting fuel directly into the combustion chamber a mixture-compressing, spark-ignited Internal combustion engine known, which at the downstream end the fuel injector a guide and Seating area of three disc-shaped Elements is formed.
  • a swirl element between a guide element and a valve seat element embedded.
  • the guide element serves to guide it protruding, axially movable valve needle, while a Valve closing section of the valve needle with a Valve seat surface of the valve seat element cooperates.
  • the Swirl element has an inner opening area multiple swirl channels that are not related to the outer circumference of the swirl element are connected. The whole Opening area extends completely over the axial Thickness of the swirl element.
  • a disadvantage of that from the above publication known fuel injector is in particular the fixed twist angle that is not the different operating conditions such as partial and Full load operation of an internal combustion engine can be adapted can. This also allows the cone opening angle of the injected mixture cloud not to the different Operating conditions are adjusted, which leads to inhomogeneities of combustion, increased fuel consumption and increased Exhaust emissions leads.
  • the fuel injector according to the invention with the has characteristic features of the main claim on the other hand the advantage that the swirl depends on Operating state of the internal combustion engine is adjustable, whereby a the operating state of the internal combustion engine adapted beam pattern can be generated. This allows the mixture formation and the combustion process are optimized become.
  • the beam opening angle is influenced advantageously about the pressure of that Fuel injector flowing through fuel, the a change in cross section of the swirl channels by a causes elastic membrane according to the operating state and thereby directly influencing the twist intensity allows.
  • the training of the Membrane as a disc-shaped membrane that between the Swirl disc and a guide disc is arranged.
  • This Embodiment is particularly light and inexpensive can be manufactured and for any shape of swirl disc applicable.
  • Another advantage is that the disc-shaped membrane is connected to the outside of the guide washer because leakage losses can thereby be avoided.
  • the membrane can advantageously also be elastic Be executed on any layer Side surface of the swirl channel can be arranged.
  • FIGS. 2 to 4 embodiments of a fuel injector 1 according to the invention closer should be described for a better understanding of the Invention first with reference to FIG. 1 the invention Fuel injector 1 in an overall view explained briefly with regard to its essential components become.
  • the fuel injector 1 is in the form of a Fuel injection valve for fuel injection systems of mixture-compressing, spark-ignited Running internal combustion engines.
  • the Fuel injection valve 1 is particularly suitable for not directly injecting fuel into one Shown combustion chamber of an internal combustion engine.
  • the fuel injection valve 1 comprises a nozzle body 2, in which the valve needle 3 is arranged.
  • the valve needle 3 is operatively connected to a valve closing body 4, the one arranged on a valve seat body 5 Valve seat surface 6 cooperates to form a sealing seat.
  • Fuel injector 1 is in the Embodiment around an inward opening Fuel injector 1, which has at least one Spray opening 7 has.
  • the nozzle body 2 is through a Seal 8 against the outer pole 9 of a magnetic circuit sealed.
  • a solenoid 10 is in a coil housing 11 encapsulated and wound on a bobbin 12, which bears against an inner pole 13 of the magnetic circuit.
  • the Inner pole 13 and outer pole 9 are through a gap 26 separated from each other and are based on one Connecting component 29 from.
  • the solenoid 10 is a Line 19 from via an electrical plug contact 17th supplyable electric current excited.
  • the plug contact 17 is surrounded by a plastic sheath 18, which on Inner pole 13 can be molded.
  • the valve needle 3 is in a valve needle guide 14 led, which is disc-shaped.
  • a paired shim 15 is used for stroke adjustment the other side of the shim 15 is a Anchor 20.
  • This stands over a first flange 21 non-positively in connection with the valve needle 3, which through a weld seam 22 with the first flange 21 connected is.
  • One is supported on the first flange 21 Return spring 23, which in the present design of the Fuel injector 1 through a sleeve 24 Bias is brought.
  • a second flange 31, which with the valve needle 3 over a weld 33 is connected serves as the lower one Armature stop.
  • a guide washer 35 is located on the inlet side of the sealing seat trained for a central alignment of the Valve needle 3 ensures and thus tilting the Valve needle 3 and subsequent inaccuracies in the counteracts the metered amount of fuel.
  • Swirl disk 34 is arranged between the Guide disc 35 and the valve seat body 5 , which has swirl channels 36.
  • a membrane 37 is provided, which preferably consists of a elastic material exists and which under the influence of system pressure prevailing in fuel injector 1 is deformable.
  • valve needle guide 14 in the armature 20 and in the Guide disc 35 run fuel channels 30a to 30c.
  • the fuel is supplied via a central fuel supply 16 supplied and filtered by a filter element 25.
  • the Fuel injector 1 is against by a seal 28 a fuel line, not shown sealed.
  • valve needle 3 If the coil current is switched off, the armature 20 falls sufficient degradation of the magnetic field by the pressure of the Return spring 23 from the inner pole 13, whereby the valve needle 3 is in operative connection with the flange 21 moved against the stroke direction. The valve needle 3 will thereby moving in the same direction, causing the Valve closing body 4 is placed on the valve seat 6 and the fuel injector 1 is closed.
  • Fig. 2 shows a schematic representation of a exemplary swirl disk 34, which the below membrane 37 according to the invention described is particularly simple and effectively supported.
  • the swirl disk 34 has in present exemplary embodiment four swirl channels 36, that tangent to a center of the swirl disk 34 are offset.
  • the offset of the swirl channels 36 and theirs radial length, their number and arrangement are included any.
  • the cross section of the swirl channels 36 is directed according to the fuel pressure and the requirements for the Swirl intensity and can be achieved by simple changes in the Width of the swirl channels 36 or the axial thickness of the Swirl disk 34 and through the membrane 37 according to the invention be adjusted.
  • Fig. 3 shows an excerpted sectional view Section of the swirl disk 34 shown in FIG. 2 of the fuel injector 1 according to the invention Area III in Fig. 2.
  • the one shown in FIG. 3, for example cuboid Swirl channel 36 has a cover plate similar to the end the membrane 37, which covers the swirl channel 36.
  • the Membrane 37 can be a disk-shaped membrane 37a between the swirl disk 34 and the guide disk 35 be arranged or in the form of an elastic layer 37b on one end of the swirl disk 34 facing the Guide disc 35 may be formed.
  • the arrow indicates the direction of flow of the fuel.
  • the arrangement of the Membrane 37 is not on the position between the Guide disk 35 and the swirl disk 34 limited, but can in principle be used on any of the radial ones Side surfaces 41 take place.
  • the disc-shaped formation and the arrangement between the swirl disk 34 and the Guide disc 35 is due to the particularly simple shape and Arrangement type as a preferred embodiment shown.
  • FIGS. 4A and 4B illustrate the operation of the disc-shaped membrane 37a or the elastic layer 37b.
  • the membrane 37a or the layer 37b is in the 4A and 4B each shown above.
  • Fig. 4A the operation of the disc-shaped Diaphragm 37a is shown schematically.
  • the swirl channel 36 is thereby in a side sectional view along the in Fig. 2 indicated line IV-IV shown.
  • the disc-shaped Membrane 37a is between the swirl disk 34 and the Guide disc 35 arranged and to avoid Leakage losses with the guide disc 35 on a radial outer edge 40 of the guide plate 35 glued or welded.
  • FIG. 4B shows the same view as FIG. 4A elastic layer 37b made membrane 37.
  • 4A is the elastic shown in FIG. 4B
  • Layer 37b is not a loose disc between the swirl disc 34 and the guide disc 35, but in the form one on the outlet end 38 of the Guide disc 35 formed elastic layer 37b, in its entire extent with the guide disc 35 connected, executed.
  • the invention is not shown on the Embodiments limited and especially in Fuel injectors 1 with piezoelectric or magnetostrictive actuators 10 and in any form of Swirl disks 34 with swirl channels 36 of any shape applicable.

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)

Claims (8)

  1. Injecteur de carburant (1), en particulier pour l'injection directe de carburant dans la chambre de combustion d'un moteur à combustion interne à allumage commandé et à compression de mélange, comprenant un actionneur (10), un aiguille de soupape (3) pouvant être actionné par l'actionneur (10) pour l'actionnement d'un corps de fermeture de soupape (4), qui conjointement avec une surface de siège de soupape (6) forme un siège hermétique, et un disque tourbillonnaire (34), qui dispose d'au moins un canal tourbillonnaire (36),
    caractérisé en ce qu'
    une membrane élastique (37) est disposée au niveau du disque tourbillonnaire (34), de telle sorte qu'une section transversale de régulation du au moins un canal tourbillonnaire (36) peut être modifiée en fonction d'une pression de carburant régnant dans l'injecteur de carburant (1) au cours du fonctionnement.
  2. Injecteur de carburant selon la revendication 1,
    caractérisé en ce que
    la membrane (37) forme au moins une surface latérale (41) du au moins un canal tourbillonnaire (36).
  3. Injecteur de carburant selon la revendication 1 ou 2,
    caractérisé en ce que
    la membrane élastique (37) est configurée sous la forme d'une membrane en forme de disque (37a).
  4. Injecteur de carburant selon la revendication 3,
    caractérisé en ce que
    la membrane en forme de disque (37a) est disposée entre le disque tourbillonnaire (34) et un disque de guidage (35) disposé du côté de l'entrée du disque tourbillonnaire (34).
  5. Injecteur de carburant selon la revendication 4,
    caractérisé en ce que
    la membrane en forme de disque (37a) est reliée au disque de guidage (35) au niveau d'au moins un bord extérieur radial (40).
  6. Injecteur de carburant selon la revendication 4 ou 5,
    caractérisé en ce qu'
    une section transversale du au moins un canal tourbillonnaire (36) diminue à mesure que la pression de carburant augmente, par le biais de la membrane en forme de disque (37a).
  7. Injecteur d'injection de carburant selon la revendication 1 ou 2,
    caractérisé en ce que
    la membrane (37) est configurée sous la forme d'une pellicule élastique (37b).
  8. Injecteur de carburant selon la revendication 7,
    caractérisé en ce qu'
    une coupe transversale du au moins un canal tourbillonnaire (36) augmente à mesure que la pression de carburant augmente, par le biais de la pellicule élastique (37a).
EP01989419A 2000-12-19 2001-12-15 Soupape d'injection de carburant Expired - Lifetime EP1299638B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10063259 2000-12-19
DE10063259A DE10063259A1 (de) 2000-12-19 2000-12-19 Brennstoffeinspritzventil
PCT/DE2001/004751 WO2002050427A1 (fr) 2000-12-19 2001-12-15 Soupape d'injection de carburant

Publications (2)

Publication Number Publication Date
EP1299638A1 EP1299638A1 (fr) 2003-04-09
EP1299638B1 true EP1299638B1 (fr) 2004-05-26

Family

ID=7667764

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01989419A Expired - Lifetime EP1299638B1 (fr) 2000-12-19 2001-12-15 Soupape d'injection de carburant

Country Status (5)

Country Link
US (1) US20050072864A1 (fr)
EP (1) EP1299638B1 (fr)
JP (1) JP2004516409A (fr)
DE (2) DE10063259A1 (fr)
WO (1) WO2002050427A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5880872B2 (ja) * 2013-01-14 2016-03-09 株式会社デンソー 燃料噴射弁及び燃料噴射装置

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4756508A (en) * 1985-02-21 1988-07-12 Ford Motor Company Silicon valve
US4647013A (en) * 1985-02-21 1987-03-03 Ford Motor Company Silicon valve
DE19736682A1 (de) * 1997-08-22 1999-02-25 Bosch Gmbh Robert Brennstoffeinspritzventil
US5996912A (en) * 1997-12-23 1999-12-07 Siemens Automotive Corporation Flat needle for pressurized swirl fuel injector
US6145496A (en) * 1998-04-07 2000-11-14 Siemens Automotive Corporation Fuel injector with porous element for atomizing fuel under air pressure
JP2000055226A (ja) * 1998-08-03 2000-02-22 Zexel Corp 流体噴射弁
US6296199B1 (en) * 1998-08-27 2001-10-02 Robert Bosch Gmbh Fuel injection valve
US6168098B1 (en) * 1999-06-09 2001-01-02 Siemens Automotive Corporation Fuel injector with tubular lower needle guide
DE10034445A1 (de) * 2000-07-15 2002-01-24 Bosch Gmbh Robert Brennstoffeinspritzventil

Also Published As

Publication number Publication date
EP1299638A1 (fr) 2003-04-09
DE10063259A1 (de) 2002-07-11
DE50102422D1 (de) 2004-07-01
US20050072864A1 (en) 2005-04-07
WO2002050427A1 (fr) 2002-06-27
JP2004516409A (ja) 2004-06-03

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