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EP1327066A2 - Soupape d'injection de carburant - Google Patents

Soupape d'injection de carburant

Info

Publication number
EP1327066A2
EP1327066A2 EP01986742A EP01986742A EP1327066A2 EP 1327066 A2 EP1327066 A2 EP 1327066A2 EP 01986742 A EP01986742 A EP 01986742A EP 01986742 A EP01986742 A EP 01986742A EP 1327066 A2 EP1327066 A2 EP 1327066A2
Authority
EP
European Patent Office
Prior art keywords
threaded rod
fuel injection
valve seat
injection valve
fuel
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
EP01986742A
Other languages
German (de)
English (en)
Other versions
EP1327066B1 (fr
Inventor
Hubert Stier
Joerg Heyse
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 EP1327066A2 publication Critical patent/EP1327066A2/fr
Application granted granted Critical
Publication of EP1327066B1 publication Critical patent/EP1327066B1/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
    • F02M61/1806—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
    • F02M61/1846—Dimensional characteristics of 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
    • F02M51/061—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
    • F02M61/04—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
    • F02M61/10—Other injectors with elongated valve bodies, i.e. of needle-valve type
    • F02M61/12—Other injectors with elongated valve bodies, i.e. of needle-valve type characterised by the provision of guiding or centring means for 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
    • 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
    • F02M61/168—Assembling; Disassembling; Manufacturing; Adjusting
    • 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

Definitions

  • the invention relates to a fuel injector according to the preamble of the main claim.
  • Fuel injection valves that have a swirl-generating element downstream of a sealing seat are e.g. known from DE 31 21 572 AI.
  • a cylindrical component is pressed into a bore which is arranged coaxially to the central axis of the fuel injection valve and which leads from a sealing seat to the spray opening and which has grooves in the cylinder jacket surface which connect the two cylinder faces to one another.
  • the grooves are arranged in a spiral and apply a swirl to the fuel flow when the fuel injector is open.
  • the grooves can be used to implement various spray patterns of the fuel jet. be adjusted in terms of their cross-section and their slope.
  • the metering of the injected fuel is also set via the grooves, which are supplemented by the valve seat body to form closed swirl channels.
  • Another fuel injector is known from US 4,520,962. Downstream of a ball valve is a rod, in 'the surface of which grooves are provided. These grooves are also arranged spirally to generate a swirl and are supplemented by the valve seat body to form closed swirl channels. Downstream there is a conically shaped spray opening.
  • a disadvantage of the fuel injectors mentioned is the complex production of the cylindrical swirl insert.
  • the introduction of individual swirl grooves is costly and time-consuming. Machining technologies are mostly used. which require reworking due to the formation of burrs when inserting the grooves.
  • the fuel injector according to the invention has the advantage that an inexpensive component can be used to generate a swirl flow through the formation of swirl channels through the threads of a threaded rod.
  • the swirl insert can be cut to length from long threaded rods with the required number of threads.
  • Threaded rods are usually manufactured without cutting using roll forming. A complex post-processing of the swirl insert is not necessary.
  • the central axis of the bore for receiving the swirl insert against the central axis of the fuel injector can include a non-zero angle. Due to the inclination of the entire swirl-generating unit with respect to the central axis of the fuel injection valve, there is no need to deflect the swirled fuel flow with the associated flow losses.
  • a swirl chamber arranged downstream of the swirl insert can influence the uniformity of the swirl in the fuel flow and thus a change in the spray pattern can be achieved. At the same time, the reduction in the flow cross-section causes the spray opening . an increase in swirl.
  • the swirl insert is formed a cavity upstream 'sung by the Zumes be sprayed the fuel takes place.
  • Figure 1 is a schematic partial section through a first embodiment of a fuel injector according to the invention.
  • Fig. 2 is a schematic partial section in section II of FIG. 1 through the first embodiment of a fuel injector according to the invention
  • the fuel injector 1 is in the form of a fuel injector 1 for fuel injection systems of mixture-compressing, spark-ignited
  • the fuel injection valve 1 is' in particular for the direct injection of fuel into an undepicted combustion chamber of an internal combustion engine.
  • the fuel injector 1 consists of . a nozzle body 2, in which a valve needle 3 is arranged.
  • the valve needle 3 is operatively connected to a valve closing body 4, which cooperates with a valve seat surface 6 arranged on a valve seat body 5 to form a sealing seat.
  • In the fuel injector 1 J in the exemplary embodiment is an electromagnetically actuated fuel injection valve 1 which has a spray opening 7.
  • the nozzle body 2 is sealed by 'a seal 8 from external pole 9 of a magnetic coil 10 degrees.
  • the magnet coil 10 is encapsulated in a coil housing 11 and wound on a coil carrier 12, which bears against an inner pole 13 of the magnet coil 10.
  • the inner pole 13 and the outer pole 9 are separated from one another by a gap 26 and are supported on a connecting component 29.
  • the magnet coil 10 is excited via a line 19 by an electrical current that can be supplied via an electrical plug contact 17.
  • the plug contact 17 is surrounded by a plastic sheath 18, which can be molded onto the inner pole 13.
  • valve needle 3 is guided in a valve needle guide 14, which is disc-shaped.
  • a paired adjusting disk 15 is used for stroke adjustment.
  • An armature 20 is located on the other side of the adjusting disk 15. This armature is non-positively connected to the valve needle 3 i via a flange 21. Connection which is connected to the flange 21, for example via a weld seam 22.
  • a restoring spring 23 is supported on the flange 21, which in the present design of the fuel injector 1 is preloaded by a sleeve 24.
  • Fuel channels 30a, 30b run in the valve needle guide 14 and in the armature 20.
  • the fuel is supplied via a central fuel supply 16 and filtered by a filter element 25.
  • the fuel is guided through fuel channels 30c, which run between the valve closing body 4 and the valve seat body 5 along flats 32 on the valve closing body 4, to the sealing seat.
  • the fuel injector 1 is sealed by a seal 28 against a distribution line, not shown.
  • the armature 20 is released by the return spring 23 via the flange 21 on the valve needle 3. acted against its stroke direction so that the valve closing body 4 is held in sealing contact with the valve seat surface 6 and the valve closing body 4 is in its stroke downward stroke-limiting end position.
  • the magnet coil 10 When the magnet coil 10 is excited, it builds up a magnetic field which moves the armature 20 in the stroke direction against the spring force of the return spring 23.
  • the armature 20 takes the flange 21, which is welded to the valve needle 3, and thus also the valve needle 3 in the lifting direction.
  • a fuel injection valve 1 according to the invention is shown in FIG. 2. Downstream of the sealing seat, a bore 35 is made in the valve seat body 5, into which a threaded rod 36 is pressed, downstream of which a conical taper 37 connects to the bore 35, which opens into the spray opening 7.
  • the central axis 38 of the bore 35 made in the valve seat body 5 is preferably inclined at an angle different from zero with respect to the central axis 39 of the fuel injection valve 1.
  • the diameter of the Bore 35 corresponds to the outside diameter of the threaded rod 36 to be pressed in.
  • the threads of the threaded rod 36 are closed through the bore 35 of the valve seat body 5 to swirl channels 33. At least one complete thread, preferably at least two complete threads, runs in the bore 35.
  • the use of threaded rods 36 of different pitches enables the twist generation to be changed with the same outer diameter of the threaded rod 36 and thus increases the proportion of components to be manufactured identically in the production of the fuel injection valve 1
  • the threaded rod 36 is pressed into the valve seat body 5 from the upstream side until its downstream end face 40b is in contact with the conical taper 37.
  • the conical taper 37 forms, upstream from the downstream end face 40b of the threaded rod 36, a swirl chamber 34 and opens downstream into the spray opening 7.
  • the swirl chamber 34 is connected by the swirl channels 33 to a cavity formed upstream of the threaded rod 36.
  • FIG 3 shows a second exemplary embodiment of a fuel injection valve 1 according to the invention.
  • the threaded rod 36 is pressed into the valve seat body 5 from the downstream side.
  • the spray opening 7 is arranged in a spray orifice plate 42, which e.g. is fixed by welding on the downstream side of the valve seat body 5.
  • the valve seat body 5 has, downstream of the sealing seat, an overflow bore 43, the diameter of which is smaller than the core diameter of the threaded rod 36 to be pressed in, and the central axis thereof preferably with the Center axis 38 of a downstream one
  • Hole 35 is identical and different from zero
  • the diameter of the bore 35 corresponds to the outer diameter of the threaded rod 36 to be pressed in.
  • the downstream end of the bore 35 emerges on the downstream side
  • Valve seat body 5 has a preferably flat surface 44 in the region of bore 35, the surface normal of which is identical to the central axis of bore 35.
  • the spray orifice plate 42 is on the valve seat body 5 e.g. attached by welding.
  • the upstream side 41 of the spray orifice plate 42 which is in contact with the surface 44 of the valve seat body 5 has a shape corresponding to the valve seat body 5.
  • the spray opening 7 is introduced in the spray orifice plate 42 in such a way that the central axis of the spray opening 7 is identical to the central axis 38 of the bore 35 in order to achieve a symmetrical spray pattern.
  • the diameter of the spray opening 7 is smaller than the diameter of the bore 35 and preferably also smaller than the core diameter of the threaded rod 36. be manufactured as a stamped part.
  • the pressed-in threaded rod 36 is shorter than the bore 35. Between the upstream end face 40a of the threaded rod 36 and the upstream end of the bore 35, a cavity 45 is formed, the height of which is determined by the distance between the upstream end face 40a of the threaded rod and the upstream end of the bore 35 is determined.
  • the swirl chamber 34 Downstream of the threaded rod -36, the swirl chamber 34 is arranged, which is formed between the downstream end face 40b of the threaded rod 36 and the upstream side 41 of the spray plate 42.
  • the swirl formed in the fuel flow is evened out in the swirl chamber 34 before the fuel flows through the spray opening 7 and is sprayed into the combustion chamber (not shown) of an internal combustion engine.
  • the center axes of the bores 35, 43 or the spray spray opening 7 can differ from one another with regard to their position and angle.
  • the preparation of the swirl of the fuel flow can be realized by using threaded rods 36, the threads of which differ with regard to the ratio of core and outer diameter and / or the pitch.
  • the influence of different lengths of the threaded rods 36 and the associated different number of twist-forming threads can also be used.

Landscapes

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

Abstract

La présente invention concerne une soupape d"injection de carburant (1) destinée à des systèmes d"injection de carburant de moteurs thermiques, comprenant un corps de fermeture de soupape (4) qui est relié à une tige de soupape (3) de manière à interagir avec celle-ci, et qui interagit avec une surface de siège de soupape (6) d"un corps de siège de soupape (5) pour former un siège étanche. L"invention fait également intervenir un élément générateur de turbulences qui est disposé en aval du siège étanche à l"intérieur du corps de siège de soupape (5) et dont l"axe médian (38) forme de préférence avec l"axe médian (39) de la soupape d"injection de carburant (1), un angle non nul, une tige filetée (36) étant insérée dans le corps de siège de soupape (5) en tant qu"élément générateur de turbulences.
EP01986742A 2000-10-10 2001-10-10 Soupape d'injection de carburant Expired - Lifetime EP1327066B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10050055 2000-10-10
DE10050055A DE10050055A1 (de) 2000-10-10 2000-10-10 Brennstoffeinspritzventil
PCT/DE2001/003846 WO2002031343A2 (fr) 2000-10-10 2001-10-10 Soupape d"injection de carburant

Publications (2)

Publication Number Publication Date
EP1327066A2 true EP1327066A2 (fr) 2003-07-16
EP1327066B1 EP1327066B1 (fr) 2006-06-28

Family

ID=7659217

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01986742A Expired - Lifetime EP1327066B1 (fr) 2000-10-10 2001-10-10 Soupape d'injection de carburant

Country Status (6)

Country Link
US (1) US6851629B2 (fr)
EP (1) EP1327066B1 (fr)
JP (1) JP2004511699A (fr)
DE (2) DE10050055A1 (fr)
RU (1) RU2002117416A (fr)
WO (1) WO2002031343A2 (fr)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4528701B2 (ja) * 2005-09-13 2010-08-18 日立オートモティブシステムズ株式会社 噴射弁及びオリフィスの加工方法
US8225602B2 (en) * 2009-06-11 2012-07-24 Stanadyne Corporation Integrated pump and injector for exhaust after treatment
US20100314470A1 (en) * 2009-06-11 2010-12-16 Stanadyne Corporation Injector having swirl structure downstream of valve seat
CN102913310A (zh) * 2011-08-05 2013-02-06 广西玉柴机器股份有限公司 一种提高氮氧化物转化率的scr后处理喷嘴
JP5811979B2 (ja) * 2012-09-24 2015-11-11 株式会社デンソー 燃料噴射弁
CN109550607B (zh) * 2019-01-30 2024-07-23 钱滋勒贸易(上海)有限公司 一种低压喷嘴
US12037967B2 (en) * 2020-08-19 2024-07-16 Cummins Inc. Fuel injector having nozzle spray holes with grooves
CN115523313B (zh) * 2022-09-06 2023-08-25 泗洪智工精密机械有限公司 一种电控喷油器的燃油控制阀

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Publication number Priority date Publication date Assignee Title
GB137134A (en) * 1919-01-29 1920-01-08 Tom Latham Improvements in spray valves for diesel engines
US2981483A (en) * 1960-02-26 1961-04-25 Nord Aviation Injector having a high flow rate ratio
FR1358593A (fr) * 1963-03-07 1964-04-17 Tecalemit Injecteur perfectionné pour l'alimentation des moteurs à combustion interne
US4186883A (en) * 1978-05-08 1980-02-05 Essex Group, Inc. Electromagnetic fuel injection valve with swirl means
JPS57126554A (en) * 1981-01-30 1982-08-06 Hitachi Ltd Electro magnetic fuel jet valve
DE3121572A1 (de) * 1981-05-30 1982-12-16 Robert Bosch Gmbh, 7000 Stuttgart "einspritzventil"
US4487369A (en) * 1982-01-11 1984-12-11 Essex Group, Inc. Electromagnetic fuel injector with improved discharge structure
JPS5915668A (ja) * 1982-07-19 1984-01-26 Hitachi Ltd 電磁気燃料噴射弁
SU1359463A1 (ru) * 1986-05-20 1987-12-15 Запорожский индустриальный институт Карбюратор дл двигател внутреннего сгорани
DE4200709A1 (de) * 1992-01-14 1993-07-15 Bosch Gmbh Robert Kraftstoffeinspritzduese fuer brennkraftmaschinen
US5484108A (en) * 1994-03-31 1996-01-16 Siemens Automotive L.P. Fuel injector having novel multiple orifice disk members
JPH11267955A (ja) * 1998-11-02 1999-10-05 Denso Corp 流体噴射弁のニードルの研削方法
US6330981B1 (en) * 1999-03-01 2001-12-18 Siemens Automotive Corporation Fuel injector with turbulence generator for fuel orifice

Non-Patent Citations (1)

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Title
See references of WO0231343A2 *

Also Published As

Publication number Publication date
WO2002031343A3 (fr) 2002-07-18
US20030111562A1 (en) 2003-06-19
EP1327066B1 (fr) 2006-06-28
WO2002031343A2 (fr) 2002-04-18
JP2004511699A (ja) 2004-04-15
US6851629B2 (en) 2005-02-08
DE10050055A1 (de) 2002-04-18
DE50110357D1 (de) 2006-08-10
RU2002117416A (ru) 2004-04-10

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