EP4193055A1 - Injektor zum einspritzen eines fluids sowie herstellungsverfahren für einen derartigen injektor - Google Patents
Injektor zum einspritzen eines fluids sowie herstellungsverfahren für einen derartigen injektorInfo
- Publication number
- EP4193055A1 EP4193055A1 EP21745817.3A EP21745817A EP4193055A1 EP 4193055 A1 EP4193055 A1 EP 4193055A1 EP 21745817 A EP21745817 A EP 21745817A EP 4193055 A1 EP4193055 A1 EP 4193055A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- spray hole
- spray
- hole component
- area
- injector
- 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
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
-
- 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
- F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
- F02M2200/80—Fuel injection apparatus manufacture, repair or assembly
- F02M2200/8053—Fuel injection apparatus manufacture, repair or assembly involving mechanical deformation of the apparatus or parts thereof
-
- 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
- F02M2200/80—Fuel injection apparatus manufacture, repair or assembly
- F02M2200/8069—Fuel injection apparatus manufacture, repair or assembly involving removal of material from the fuel apparatus, e.g. by punching, hydro-erosion or mechanical operation
Definitions
- the present invention relates to an injector for injecting a fluid, in particular a so-called vortex injector, and a method for producing such an injector.
- the injector according to the invention is preferably a fuel injector, in particular a gasoline injector, or a water injector or a urea injector.
- Injectors are known in the art in different configurations.
- DE 102006 057279 A1 shows an injector with a spray hole plate which is electroformed.
- injectors with a plurality of spray holes are used for the best possible atomization of the fluid to be injected.
- this can result in a complex geometry of the injector.
- the different geometric parameters influence a flow rate and an angle of the spray generated in the injection chamber, in particular the combustion chamber of an internal combustion engine, to a large extent.
- the best possible atomization of the injected fluid should be made possible for combustion that is as complete as possible and to comply with emission regulations.
- the injector according to the invention for injecting a fluid with the features of claim 1 has the advantage that certainly a very fine atomization of the fluid to be injected, in particular gasoline or water, is possible. This is particularly preferably possible in a low-pressure range of less than 100 ⁇ 10 5 Pa. According to the invention, very good atomization of the fluid to be injected is made possible without increasing the injection pressure.
- the injector according to the invention can be manufactured very simply and inexpensively. Furthermore, a target angle of a substantially conical spray in the injection chamber can be made possible in a simple and reliable manner. According to the invention, this is achieved in that the injector has a closing element which opens and closes a fluid passage on a valve seat. Furthermore, a spray hole component with a plurality of spray holes is provided.
- the spray hole component is, for example, a spray hole plate or a pot-shaped component, a plurality of, in particular cylindrical, spray holes, for example four or six spray holes, being provided in each case.
- eddy chambers are formed around the spray holes on an inner side of the spray hole component that is directed towards the closing element.
- the turbulence chambers on the inside of the spray hole component can impart a predetermined swirl to the exiting spray.
- a material reduction region for reducing the thickness of the spray hole component is formed on each spray hole on an outside of the spray hole component that faces away from the closing element. As a result, a length, in particular a cylindrical length, of the spray hole can be set precisely.
- the spray hole is preferably completely cylindrical. Since the spray hole length is set on the outside of the spray hole component, the inside of the spray hole component, which has the swirl chambers and possibly also channels or the like, can be adjusted in one step, e.g. B. by means of a forming process. The spray hole length can then only be adjusted on the outside of the spray hole component. An inner geometry of the spray hole component is not influenced by the setting of the spray hole length.
- the material reduction area is preferably formed partially or completely around the spray hole.
- a material reduction area that completely surrounds the spray hole can be produced very easily.
- improved atomization can also be achieved by providing the material reduction area only partially around the spray hole, for example in a peripheral area of 50% or more of the total circumference, in order to achieve significant improvements in the atomization of the spray.
- the material reduction area on the outside of the spray hole component is preferably provided as a forming area, which is provided by a forming process.
- the forming process is particularly preferably pressure forming, in particular embossing or indenting the area on the outside of the spray hole component around an outlet area of the spray hole.
- the material reduction area is provided as a machined area.
- the material reduction area can be provided by a machining process, for example milling or grinding or the like. More preferably, the material reduction area is an eroding area or an etching area.
- the spray hole component is preferably a spray hole plate or a pot-shaped spray hole component.
- the valve seat of the injector is preferably also arranged on the spray hole component.
- the swirl chambers on the inside of the spray hole component are also produced by a forming process, in particular embossing or pressure forming.
- the injection hole component also preferably has channels which lead to the individual swirl chambers on the injection holes. The channels are preferably formed in a straight line.
- the injector is preferably a gasoline injector or a water injector or a urea injector.
- the present invention also relates to a method for producing a spray hole component of an injector for introducing a fluid with the features of claim 5.
- the method according to the invention can be carried out very simply and inexpensively, so that the production costs for such a spray hole component can be kept very low.
- the method comprises the steps of producing a multiplicity of, in particular cylindrical, spray holes in the spray hole component with a swirl chamber formed on an inner side of the spray hole component.
- an outside of the spray hole component is then machined on the outside at an exit area of the spray holes in such a way that a length of the spray holes is adjusted by reducing the material.
- a final length of the spray holes is made solely by machining on the outside of the spray hole component.
- no machining is required on the inside of the spray hole component, on which the swirl chambers and possibly supplying channels or the like are formed. This avoids the risk of damage to the sometimes complex geometry on the inside of the spray hole component, since according to the invention only the length of the spray hole is machined on the outside.
- the adjustment of the length of the spray holes is preferably carried out in a single process step.
- the spray holes at the outlet area on the outside of the spray hole component are machined only on a partial circumference of the outlet area or alternatively on the entire circumference of the outlet area.
- the machining of the outside of the spray hole component is preferably carried out by a forming process.
- This has the advantage that the length of the spray holes can be adjusted in one step using only one forming step.
- the forming process is preferably pressure forming, in particular embossing or indenting or the like.
- the forming can be carried out as cold forming.
- the outside of the injection component is processed by a machining process to adjust the length of the injection holes.
- the machining process can be, for example, milling or grinding or the like.
- a widening area is formed at the outlet area of the spray hole, in particular a conically widening area, as a result of which the length of the spray holes is adjusted.
- the spray hole component is particularly preferably produced in a first step by deep-drawing to produce a turbulence path, in particular supply channels, as well as forming a basic internal geometry of the spray hole component, and in a second subsequent step the turbulence chambers.
- the injection holes are then introduced, for example by a machining process such as drilling or by means of a laser.
- the outside of the spray hole component is then machined in order to produce the material reduction areas at the outlet areas of the spray hole.
- the outside of the spray hole component can also be produced by an eroding process or an etching process to reduce the material.
- the spray hole component produced by the method according to the invention has no negative effects on a flow rate through the spray holes, since no changes are made to the spray holes themselves, in particular the diameter, or to the inner geometry of the spray hole component.
- an existing tool for forming the inner geometry of the spray hole component does not have to be changed.
- Figure 1 shows a schematic sectional view of an injector with a spray hole component according to a first preferred embodiment of the invention
- Figure 2 is a schematic representation of an inside of the injector with a spray hole component
- Figure 3 is a schematic representation of an outside of the
- Figure 4 is a schematic partial sectional view of the spray hole component of
- FIG. 5 shows a schematic external view of a spray hole component according to a second exemplary embodiment of the invention.
- FIG. 6 shows a schematic partial sectional view of the spray hole component from FIG.
- the injector 1 of this embodiment is a fuel injector.
- the injector 1 includes a magnetic actuator 20 and a closing element 2 in the form of a closing needle.
- a ball 21 is provided at the free end of the closing needle, which opens and closes a fluid passage on a valve seat 5 in a known manner.
- valve seat 5 is formed on a component connected to an injection hole component 3 .
- the spray hole component 3 has a multiplicity of cylindrical spray holes 4 . In this exemplary embodiment, exactly four spray holes 4. Furthermore, the spray hole component 3 is designed as a disk. As can be seen from FIG. 1, the spray hole component 3 is connected to a valve housing 21 .
- Figure 2 shows a view of an inner side 6 of the spray hole component 3.
- the spray holes 4 each swirl chambers 40 are formed, which the impose a twist on the fluid to be injected, so that when the fluid to be injected exits, the spray cone generated spreads out with a twist or eddy-like in the injection chamber.
- each channel 41 leads to a vortex chamber 40 which, as can be seen from FIG. 2, is slightly bent at a predetermined angle in the circumferential direction of the injector.
- the injection holes 4 are formed.
- FIG. 3 shows an outside 7 of the spray hole component according to the first exemplary embodiment of the invention.
- the channels and turbulence chambers produced by embossing are stamped from the inside in negative form.
- a material reduction area 8 is formed at an exit area of each spray hole 4 .
- the material reduction area 8 can be seen in detail from the sectional view of FIG.
- a normal thickness of the spray hole component is identified by the reference number 9.
- the spray hole component 3 has a reduced thickness, which is reduced by the material reduction 11.
- the spray hole 4 is arranged in this area. In this way, a cylindrical length 10 of the spray hole 4, which is cylindrical, can be adjusted.
- a predetermined cylindrical length of the injection hole 4 is thus produced exclusively by machining the injection hole on the outside 7 .
- the material reduction area 8 can be, for example, a deformed area that was produced exclusively by a deforming process such as embossing or indenting or the like, or alternatively it can be a region produced by means of a machining process or an eroding process or an etching process. All material reduction areas 8 on the spray holes 4 are preferably produced simultaneously in one step. As can be seen from FIG. 4, the reduction in material 11 in this exemplary embodiment is approximately 20% of the thickness 9 of the spray hole component.
- the spray hole component 3 can thus be produced by the method according to the invention in such a way that in a first step the inside 6 of the spray hole component 3 and the cylindrical spray holes 4 are produced and in a final step the outside 7 is machined in order to form a cylindrical Set the length 10 of the spray hole 4 in one step.
- the inner side 6 can be produced, for example, first by deep-drawing the spray hole component 3 to produce a basic inner geometry 43 and a subsequent forming step, for example by embossing on the inner side 6 to produce the swirl chambers 14 and the channels 41 .
- the spray holes 4 can then be placed in the center of the turbulence chambers 40 and, in a final, individual step, the outside 7 of the spray hole component 3 can be machined in order to produce the exact length 10 of the spray holes by reducing the material on the outside 7 .
- the method according to the invention can be carried out very simply and inexpensively.
- the spray hole component 3 produced in this way enables excellent atomization of the fluid to be injected by precisely maintaining the length 10 of the spray hole 4 without a flow rate through the spray holes 4 being adversely affected as a result.
- a cone angle of the fluid to be injected in the injection chamber for example a combustion chamber of an internal combustion engine with a direct injecting injector, can also be exactly maintained.
- FIGS. 5 and 6 show a spray hole component 3 according to a second embodiment of the invention. Identical or functionally identical parts are denoted by the same reference numerals as in the first exemplary embodiment.
- the spray hole component 3 of the second exemplary embodiment has a different material reduction area 8 .
- the material reduction area 8 is formed by a conically widening area 42 at the outlet area of the spray hole 4 .
- the conically widening Area 42 does not have to be formed completely around the outer area of the spray hole 4, but it is sufficient to achieve the goals according to the invention if the conical area 42 is only partially made around the spray hole at the outlet area.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Fuel-Injection Apparatus (AREA)
- Lift Valve (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102020209855.7A DE102020209855A1 (de) | 2020-08-05 | 2020-08-05 | Injektor zum Einspritzen eines Fluids sowie Herstellungsverfahren für einen derartigen Injektor |
| PCT/EP2021/070082 WO2022028863A1 (de) | 2020-08-05 | 2021-07-19 | Injektor zum einspritzen eines fluids sowie herstellungsverfahren für einen derartigen injektor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP4193055A1 true EP4193055A1 (de) | 2023-06-14 |
| EP4193055B1 EP4193055B1 (de) | 2025-09-24 |
Family
ID=77042978
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP21745817.3A Active EP4193055B1 (de) | 2020-08-05 | 2021-07-19 | Injektor zum einspritzen eines fluids sowie herstellungsverfahren für einen derartigen injektor |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP4193055B1 (de) |
| JP (1) | JP7560650B2 (de) |
| DE (1) | DE102020209855A1 (de) |
| WO (1) | WO2022028863A1 (de) |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1175559B1 (de) * | 1999-04-27 | 2006-04-12 | Siemens VDO Automotive Corporation | Brennstoffeinspritzventilsitz mit einer scharfen kante |
| JP3780472B2 (ja) * | 2000-01-27 | 2006-05-31 | 愛三工業株式会社 | 燃料噴射弁 |
| US6405945B1 (en) | 2000-09-06 | 2002-06-18 | Visteon Global Tech., Inc. | Nozzle for a fuel injector |
| US7086615B2 (en) | 2004-05-19 | 2006-08-08 | Siemens Vdo Automotive Corporation | Fuel injector including an orifice disc and a method of forming an oblique spiral fuel flow |
| DE102006057279A1 (de) | 2006-12-05 | 2008-06-12 | Robert Bosch Gmbh | Brennstoffeinspritzventil und Verfahren zur Herstellung eines Ventilsitzes für ein Brennstoffeinspritzventil |
| JP5336451B2 (ja) | 2010-09-30 | 2013-11-06 | 日立オートモティブシステムズ株式会社 | 燃料噴射弁 |
| JP5875443B2 (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 |
| DE102012211191A1 (de) | 2012-06-28 | 2014-01-02 | Robert Bosch Gmbh | Ventil zum Zumessen von Fluid |
| JP6460858B2 (ja) | 2015-03-17 | 2019-01-30 | 株式会社エンプラス | 燃料噴射装置用ノズルプレート |
| CN110185566A (zh) | 2019-06-20 | 2019-08-30 | 江苏巴腾科技有限公司 | 一种旋流式喷孔板及喷嘴 |
-
2020
- 2020-08-05 DE DE102020209855.7A patent/DE102020209855A1/de active Pending
-
2021
- 2021-07-19 JP JP2023506294A patent/JP7560650B2/ja active Active
- 2021-07-19 WO PCT/EP2021/070082 patent/WO2022028863A1/de not_active Ceased
- 2021-07-19 EP EP21745817.3A patent/EP4193055B1/de active Active
Also Published As
| Publication number | Publication date |
|---|---|
| JP7560650B2 (ja) | 2024-10-02 |
| JP2023537313A (ja) | 2023-08-31 |
| DE102020209855A1 (de) | 2022-02-10 |
| EP4193055B1 (de) | 2025-09-24 |
| WO2022028863A1 (de) | 2022-02-10 |
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