EP1402175A1 - Soupape d'injection de carburant - Google Patents

Soupape d'injection de carburant

Info

Publication number
EP1402175A1
EP1402175A1 EP02729859A EP02729859A EP1402175A1 EP 1402175 A1 EP1402175 A1 EP 1402175A1 EP 02729859 A EP02729859 A EP 02729859A EP 02729859 A EP02729859 A EP 02729859A EP 1402175 A1 EP1402175 A1 EP 1402175A1
Authority
EP
European Patent Office
Prior art keywords
fuel injection
swirl
injection valve
valve seat
receiving part
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
EP02729859A
Other languages
German (de)
English (en)
Other versions
EP1402175B1 (fr
Inventor
Günter DANTES
Detlef Nowak
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 EP1402175A1 publication Critical patent/EP1402175A1/fr
Application granted granted Critical
Publication of EP1402175B1 publication Critical patent/EP1402175B1/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
    • 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
    • F02M61/1853—Orifice plates
    • F02M61/186—Multi-layered orifice plates
    • 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 relates to a fuel injector according to the preamble of claim 1.
  • Fuel injection valves provide swirl-generating elements with which a swirl component is impressed on the fuel to be sprayed, by means of which the fuel is better atomized and breaks down into smaller droplets. It is already known to arrange the swirl-generating means upstream, that is, in front of the valve seat and, on the other hand, downstream, that is, behind the valve seat.
  • Swirl-generating means which are arranged downstream of the valve seat, are usually designed in such a way that fuel is introduced into the radially outer ends of swirl channels, which fuel is then guided radially inward to a swirl chamber, into which it enters with a tangential component. The swirling fuel then emerges from the swirl chamber.
  • a fuel injector is already known from DE-OS 198 15 775, in which a swirl disk is provided downstream of the valve seat which has such a flow pattern. The fuel is disorderly fed to the swirl disk to inlet areas of the swirl channels; there is no specific flow guidance to the swirl channels.
  • the fuel injector according to the invention with the characterizing features of claim 1 has the advantage that a very high atomization quality of a fuel to be sprayed off is achieved with it. As a consequence, such an injection valve of an internal combustion engine can the exhaust gas emission of the internal combustion engine is reduced and a reduction in fuel consumption can also be achieved.
  • the swirl channels of the swirl element are advantageously flowed by fuel very precisely and reliably.
  • a receiving part according to the number of swirl channels of the swirl element following downstream, exactly the same number of supply channels are provided, which are directed towards the inlet ends of the swirl channels, so that the fuel supply to the swirl channels is flow-oriented.
  • the fuel injection valve according to the invention it is very easy to spray fuel at an angle at an angle ⁇ to the valve longitudinal axis, which may be necessary under certain installation conditions.
  • the swirl element is installed at an angle, which is why the feed channels in the receiving part can have different lengths.
  • the swirl element can be produced inexpensively in a particularly simple manner.
  • a particular advantage is that the swirl elements can be produced in a reproducible manner at extremely high precision in very large numbers (high batch capacity). It is particularly advantageous to produce the swirl element using so-called multilayer electroplating. Due to their metallic design, such swirl elements are very shatterproof and easy to assemble. The use of multilayer electroplating allows an extremely high degree of design flexibility, since the contours of the opening areas (swirl channels, outlet opening) can be freely selected in the swirl element. drawing
  • FIG. 1 shows a partially illustrated fuel injector in section
  • FIG. 2 shows a plan view of the swirl element used in the fuel injector according to FIG. 1.
  • FIG. 1 of FIG. 1 is an exemplary embodiment of a valve in the form of an injection valve for
  • the injection valve has a tubular valve seat support 1, in which a longitudinal opening 3 is formed concentrically with a valve longitudinal axis 2.
  • a valve needle 5 is arranged in the longitudinal opening 3 and has a valve closing section 7 at its downstream end.
  • the injection valve is actuated in a known manner, for example electromagnetically.
  • a schematically indicated electromagnetic circuit with a magnet coil 10, an armature 11 and a core 12 is used for the axial movement of the valve needle 5 and thus for opening against the spring force of a return spring (not shown) or closing the injection valve.
  • the armature 11 is connected to the valve closing section 7 opposite end of the valve needle 5 by z.
  • B. a weld formed by a laser connected and aligned to the core 12.
  • a ⁇ other excitable actuator such as a piezoelectric stack, can be used in a comparable fuel injector, or carried actuating the axially movable valve member by a hydraulic pressure or servo pressure.
  • a guide opening 13 of a guide element 14 serves to guide the valve needle 5 during the axial movement.
  • the guide element 14 has at least one flow opening 15 through which fuel can flow out of the longitudinal opening 3 in the direction of a valve seat. That e.g. disk-shaped guide element 14 is, for example, firmly connected to a valve seat body 16 by means of a circumferential weld seam.
  • the valve seat body 16 is e.g. tightly mounted on the end of the valve seat support 1 facing away from the core 12 by welding.
  • the position of the valve seat body 16 determines the size of the stroke of the valve needle 5, since the one end position of the valve needle 5 when the solenoid 10 is not energized is determined by the valve closing section 7 resting on a valve seat surface 22 of the valve seat body 16 that tapers conically downstream.
  • the other end position of the valve needle 5 is determined when the solenoid 10 is excited, for example by the armature 11 resting on the core 12.
  • the path between these two end positions of the valve needle 5 thus represents the stroke.
  • the valve closing section 7 interacts with the frustoconical valve seat surface 22 of the valve seat body 16 to form a sealing seat. Downstream of the valve seat surface 22, the valve seat body 16 has a central outlet opening 23.
  • valve seat body 16 there is, for example, a disk-shaped receiving part 25 downstream of the outlet opening 23 arranged, which serves to securely hold a smaller, for example likewise disk-shaped swirl element 26 and to supply fuel to this swirl element 26 in a targeted manner.
  • the receiving part 25 is in turn attached to the valve seat body 16 by welding, for example.
  • the receiving part 25 On its downstream end face 27, the receiving part 25 has a recess 32 for receiving the swirl element 26, the axial depth of the recess 32 corresponding at least approximately to the thickness of the swirl element 26, so that the swirl element 26 e.g. ends flush with the end face 27 of the receiving part 25.
  • the receiving part 25 according to the number of radially inward swirl channels 28 of the swirl element 26, exactly the same number of bore-like feed channels 33 are provided, which are directed towards outer inlet ends 34 of the swirl channels 28. All feed channels 33 of the receiving part 25 are supplied directly by fuel emerging from the outlet opening 23. Starting from this central start of the feed channels 33, the feed channels 33 run obliquely inclined with an axial and an outwardly directed radial component.
  • the feed channels 33 are in the receiving part 25 e.g. introduced by drilling, eroding or laser drilling.
  • the swirl element 26 is a disk-shaped component which is designed as a spray orifice disk and which is designed, for example, in two layers.
  • the swirl element 26 is formed over both layers with a circumferential edge which encloses an inner opening structure which is in the upper, the valve seat body 16 facing position comprises the swirl channels 28 with their inlet ends 34 and an inner swirl chamber 30, while the opening structure in the lower layer is formed by an outlet opening 29 following the swirl chamber 30.
  • FIG. 2 shows a plan view of the swirl element 26 used in the fuel injection valve according to FIG. 1.
  • the swirl element 26 has, for example, four swirl channels 28, the inlet ends 34 of which are supplied with fuel from four supply channels 33, exactly one 'supply channel ending at a swirl channel 28.
  • the swirl channels 28 run radially inwards from the inlet ends 34 in order to open tangentially into the swirl chamber 30 located in the region of the valve longitudinal axis 2. From there, the swirling fuel leaves the swirl element 26 via the outlet opening 29.
  • the fuel injection valve it is also possible to spray fuel at an angle at an angle ⁇ to the longitudinal axis of the valve, which may be necessary under certain installation conditions.
  • the swirl element 26 is installed obliquely in the receiving part 25, which is why the feed channels 33 in the receiving part 25 then have different lengths, depending on the distance from the inlet ends 34 of the swirl channels 28 to the outlet opening 23.
  • the swirl element 26 is built up, for example, in several metallic layers, for example by galvanic deposition (multilayer electroplating). Because of the deep lithographic, galvanotechnical production, there are special features in the contouring, some of which are summarized here in short form: layers with a constant thickness over the pane surface, - the deep lithographic structuring largely vertical incisions in the layers that form the respective ' flowed through cavities (manufacturing-related deviations of approx. 3 ° compared to optimally vertical walls can occur),
  • the flow against the swirl channels 28 of the swirl element 26 according to the invention is * completely independent of the manner in which the swirl element 26 is produced. This can also be formed in metal, plastic or other materials using other conventional production methods.

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)

Abstract

L'invention concerne une soupape d'injection de carburant pour installations d'injection de carburant de moteurs à combustion interne, comprenant, entre autres, un actionneur (10, 11, 12) et un élément de soupape mobile (5, 7) coopérant avec un siège de soupape (22) fixe pour ouvrir et fermer la soupape, ce siège de soupape étant formé sur un corps de siège de soupape (16). En aval du siège de soupape (22) se trouve un élément à tourbillons (26) en forme de disque, qui comporte au moins une d'entrée (34) et au moins un orifice de sortie (29), ainsi qu'au moins un canal à tourbillons (28) en amont de l'orifice de sortie (29). L'élément à tourbillons (26) est logé dans un élément de réception (25) en forme de disque. A chaque extrémité d'entrée (34) d'un canal à tourbillons (28) est orienté précisément un canal d'admission (33) façonné dans l'élément de réception (25). Cette soupape d'injection de carburant est particulièrement adaptée en tant que soupape à haute pression pour l'injection directe de carburant dans une chambre à combustion de moteur à allumage commandé et à compression de mélange.
EP02729859A 2001-04-12 2002-04-09 Soupape d'injection de carburant Expired - Lifetime EP1402175B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10118276 2001-04-12
DE10118276A DE10118276A1 (de) 2001-04-12 2001-04-12 Brennstoffeinspritzventil
PCT/DE2002/001288 WO2002084111A1 (fr) 2001-04-12 2002-04-09 Soupape d'injection de carburant

Publications (2)

Publication Number Publication Date
EP1402175A1 true EP1402175A1 (fr) 2004-03-31
EP1402175B1 EP1402175B1 (fr) 2008-03-05

Family

ID=7681353

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02729859A Expired - Lifetime EP1402175B1 (fr) 2001-04-12 2002-04-09 Soupape d'injection de carburant

Country Status (7)

Country Link
US (1) US20040011895A1 (fr)
EP (1) EP1402175B1 (fr)
JP (1) JP2004518908A (fr)
CN (1) CN1461383A (fr)
CZ (1) CZ20023956A3 (fr)
DE (2) DE10118276A1 (fr)
WO (1) WO2002084111A1 (fr)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009243322A (ja) * 2008-03-31 2009-10-22 Hitachi Ltd 燃料噴射弁及びガイド部材の加工方法
CN102410121A (zh) * 2011-09-08 2012-04-11 何林霏 S型雾化喷嘴
JP5875442B2 (ja) * 2012-03-30 2016-03-02 日立オートモティブシステムズ株式会社 燃料噴射弁
JP5887291B2 (ja) * 2013-03-08 2016-03-16 日立オートモティブシステムズ株式会社 燃料噴射弁
JP6433162B2 (ja) * 2014-02-12 2018-12-05 株式会社エンプラス 燃料噴射装置用ノズルプレート
JP6524788B2 (ja) * 2015-05-11 2019-06-05 株式会社Ihi 燃料噴射装置およびエンジン
US10344725B2 (en) * 2017-06-14 2019-07-09 Continental Powertrain, USA, LLC. Fluid injector spray disc having offset channel architecture, and methods for constructing and utilizing same
EP3728826A1 (fr) * 2017-12-21 2020-10-28 3M Innovative Properties Company Buse d'injecteur de fluide avec chambre de turbulence
BR112021016790A2 (pt) * 2019-02-25 2021-11-16 Cummins Inc Bico de sede de redemoinho
CN113279845B (zh) * 2021-05-23 2022-02-11 南岳电控（衡阳）工业技术股份有限公司 一种双级旋流尿素喷射器

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1843821A (en) * 1929-09-30 1932-02-02 Joslyn Diesel Engine Company L Fuel atomizing nozzle
DE827139C (de) * 1948-02-16 1952-01-07 Lucas Ltd Joseph Einspritzduese fuer Brennkraftmaschinen
JPS5854264B2 (ja) * 1979-02-23 1983-12-03 トヨタ自動車株式会社 定圧型燃料噴射弁
DE3013007C2 (de) * 1980-04-03 1994-01-05 Bosch Gmbh Robert Einspritzventil für Kraftstoffeinspritzanlagen von Brennkraftmaschinen
JPS60222557A (ja) * 1984-04-20 1985-11-07 Hitachi Ltd 電磁式燃料噴射弁
DE3943005A1 (de) * 1988-12-28 1990-07-05 Hitachi Ltd Elektromagnetische einspritzventilvorrichtung
US5570841A (en) * 1994-10-07 1996-11-05 Siemens Automotive Corporation Multiple disk swirl atomizer for fuel injector
DE19607266A1 (de) 1995-03-29 1996-10-02 Bosch Gmbh Robert Lochscheibe, insbesondere für Einspritzventile und Verfahren zur Herstellung einer Lochscheibe
ES2178702T3 (es) * 1995-03-29 2003-01-01 Bosch Gmbh Robert Disco perforado, en especial para valvula de inyeccion.
DE19815775A1 (de) 1998-04-08 1999-10-14 Bosch Gmbh Robert Drallscheibe und Brennstoffeinspritzventil mit Drallscheibe
DE19815800A1 (de) * 1998-04-08 1999-10-14 Bosch Gmbh Robert Brennstoffeinspritzventil

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO02084111A1 *

Also Published As

Publication number Publication date
EP1402175B1 (fr) 2008-03-05
DE50211838D1 (de) 2008-04-17
JP2004518908A (ja) 2004-06-24
WO2002084111A1 (fr) 2002-10-24
DE10118276A1 (de) 2002-10-17
CN1461383A (zh) 2003-12-10
US20040011895A1 (en) 2004-01-22
CZ20023956A3 (en) 2004-07-14

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