WO2015154903A1 - Verfahren zur herstellung von einspritzöffnungen sowie kraftstoffinjektor mit derartigen einspritzöffnungen - Google Patents
Verfahren zur herstellung von einspritzöffnungen sowie kraftstoffinjektor mit derartigen einspritzöffnungen Download PDFInfo
- Publication number
- WO2015154903A1 WO2015154903A1 PCT/EP2015/053374 EP2015053374W WO2015154903A1 WO 2015154903 A1 WO2015154903 A1 WO 2015154903A1 EP 2015053374 W EP2015053374 W EP 2015053374W WO 2015154903 A1 WO2015154903 A1 WO 2015154903A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- precursor
- wall
- laser
- radius
- injection
- Prior art date
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
- F02M61/168—Assembling; Disassembling; Manufacturing; Adjusting
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/36—Removing material
- B23K26/38—Removing material by boring or cutting
- B23K26/382—Removing material by boring or cutting by boring
- B23K26/389—Removing material by boring or cutting by boring of fluid openings, e.g. nozzles, jets
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
- B23P15/16—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass plates with holes of very small diameter, e.g. for spinning or burner nozzles
-
- 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
-
- 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
- F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
- F02M2200/03—Fuel-injection apparatus having means for reducing or avoiding stress, e.g. the stress caused by mechanical force, by fluid pressure or by temperature variations
-
- 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 a process for the preparation of
- Injection openings of a fuel injector and a fuel injector with such injection openings are provided.
- Fuel injectors with injection openings are known from the prior art in different embodiments. Especially at
- injection ports often have a spray hole and a preliminary stage.
- a cross-section of a component is reduced, which leads in particular to a deflection of lines of force when the component is subjected to internal pressure (fuel pressure).
- the provision of precursors further reduces a wall thickness between adjacent injection openings or to an outer wall of the
- Fuel! njektors This can then lead to problems in mechanical strength. So far, the precursors of the injection openings for fuel injectors, for example, by a machining process, in particular drilling, produced. Alternatively, it would also be possible to produce the injection openings by means of a laser, but the laser has the disadvantage that only slight removal rates can be achieved in comparison to mechanical removal methods.
- the injection hole is produced in a second step, with some non-cutting methods such as
- Spark erosion and laser drilling are used. Between the precursor wall and the precursor floor results in an edge, which leads to a strong deflection of lines of equal stress in the component.
- the inventive method for producing injection openings of a fuel! njektors with the features of claim 1 has the advantage that injection openings with precursors can be produced, which higher loads, especially higher fuel pressures withstand, without requiring an increase in wall thicknesses or the like.
- the injection opening according to the invention comprises a preliminary stage and the actual injection hole, which, starting from the precursor, injects the fuel into a combustion chamber or the like.
- the method according to the invention comprises the steps of producing the precursor by means of a mechanical, chip-removing method, in particular milling or drilling, or by means of laser ablation. Furthermore, a radius is made at a transition of the precursor between a precursor wall and a precursor bottom by means of a laser. Furthermore, the injection hole is still placed in the precursor soil of the precursor.
- one, for example mechanically ablative one, for example mechanically ablative,
- the inventive method additionally or alternatively to the generation of a radius at a transition of the precursor comprises the introduction of grooves in the precursor wall and / or the precursor soil.
- the groove or grooves can thus be provided independently of the provision of a radius at the transition of the precursor and also serve to relieve the material, so that higher loads on the precursor by pressures or the like. Possible.
- the dependent claims show preferred developments of the invention.
- the injection hole is also produced by means of a laser.
- the radius in one machining step preferably both the radius in
- Transition region between precursor wall and precursor soil are made, as well as the injection hole itself. Further preferred is also the
- Precursor bottom machined with the laser to provide the best possible surface receive. In this case, only a small material thickness is removed from the precursor floor.
- grooves are introduced into the precursor wall and / or the precursor floor by means of the laser.
- the grooves also have a positive effect on the
- the grooves are preferably as completely circumferential grooves, preferably with an im
- a second, smaller precursor is introduced, which has a second radius at a transition region between wall and bottom of the second
- the second, smaller precursor is also preferably provided by means of the laser.
- the second radius is also produced at the transition between a wall region and a bottom region of the second precursor by means of a laser.
- the precursor is preferably used by means of
- the present invention relates to a fuel! Njektor with at least one injection port, which has a precursor and a spray hole.
- the precursor has a radius at a transition between a precursor wall and a precursor bottom in order to less deflect the voltage lines in the component having the injection opening.
- radius may preferably in the precursor wall and / or the
- Pre-floor a groove can be introduced. Furthermore, a combination of radius and groove at the precursor of the injection opening is possible.
- one or more grooves are provided in the precursor wall and / or in the precursor bottom, which are preferably formed completely circumferentially.
- the grooves are preferably generated by means of laser.
- a second precursor is provided between the precursor and the injection hole, which has a second radius at a transition region between the wall and the bottom of the second precursor.
- the fuel comprises! Njektor also a valve housing, in which the injection port is provided.
- the fuel includes! Njektor a spray perforated disk, in which at least one, preferably a plurality, injection openings are formed.
- Figure 1 is a schematic sectional view of a fuel injector
- Figure 2 is a schematic sectional view of an injection port of
- FIG. 2 during the manufacturing process
- Figure 3 is a schematic sectional view of the injection port of
- FIG. 2 in the finished state
- FIG. 4 shows a schematic sectional view of an injection opening according to a second exemplary embodiment of the invention
- Figure 5 is a schematic sectional view of an injection port according to a third embodiment of the invention.
- Figure 6 is a schematic sectional view of an injection port according to a fourth embodiment of the invention.
- FIG. 1 shows schematically a fuel injector 1, which in a
- Valve housing 6 has a plurality of injection openings 2.
- the fuel injector 1 comprises a valve needle 11 with a ball 12, which releases and closes the injection openings 2 at a valve seat.
- the valve needle 11 is connected via a driver element 13 with an armature 21 of a Magnetaktors 20.
- the magnetic actuator 20 further includes a coil 22, a pole core 23 and a
- a working gap 25 is provided between the armature 21 and the pole core 23 in the axial direction.
- the armature 21 is in a known manner by means of a return element 15 in the one shown in Figure 1
- Starting position which represents the closed position of the fuel injector, returned.
- the restoring force of the return element can be defined by means of an adjusting sleeve 16.
- Fuel is, as indicated by the arrow A in Figure 1, fed in the axial direction through the adjusting sleeve 16 and the hollow driver element 13 in a space 17 in the region of the valve needle 11. For this purpose, through openings 14 in
- FIG. 3 shows the finished state of the injection opening 2, which has a preliminary stage 3 and a spray hole 4.
- the precursor 3 has a
- Pre-stage wall 30 and a precursor bottom 31 are substantially cylindrical and the precursor bottom 31 is perpendicular to the axial direction X-X of the injection port 2.
- a transition region between the precursor wall and the precursor bottom 31 is by means of a radius R
- the radius R at the transition region between the precursor wall 30 and the precursor bottom 31 ensures that the lines 5 drawn in FIG. 3 do not bend too much, especially in the region of the transition. Areas of sharp deflections of the lines of equal tension usually result in zones of locally high mechanical stress in different planes. A spacious diversion leaves on a favorable
- FIG. 2 shows schematically the production of injection opening 2.
- Step is performed by means of a cutting tool, e.g. a drill or a milling cutter, the precursor 3 made to a depth T1.
- a cutting tool e.g. a drill or a milling cutter
- the use of the cutting tool can with a high
- Abtrag york be performed.
- the entire precursor can be generated with a laser.
- a remaining material which is identified by reference numeral 3 'in FIG. 2 is removed by means of a laser. This is done
- Transition region between the precursor wall 30 and the precursor bottom 31 by means of the laser R radius generated is generated.
- an arcuate transition between precursor wall 30 and precursor bottom 31 is provided, which would not be available if only by machining a cutting tool.
- the injection hole 4 is then generated by means of the laser.
- a functional value of the component with respect to an increase in the load capacity can be improved by higher pressures, without any appreciable cost increases being caused by the method according to the invention in the production of the injection opening 2.
- any radii R can be produced at the transition region between the precursor wall 30 and the precursor bottom 31 by means of the laser, this can inventive method are also performed for a variety of diameters of the precursor 3, which, for example, each to different
- Figures 4 and 5 show further preferred embodiments of the invention.
- an additional second precursor 7 is formed, which was also prepared by means of the laser due to their small depth.
- a second radius R2 is formed at the transition between the wall and the bottom of the second precursor 7. This is adapted according to the diameter of the second precursor 7 and slightly smaller than the radius R1 at the first precursor 3.
- a circumferential first groove 8 is also provided in the precursor bottom 31 and a second circumferential groove 9 in the Pre-stage wall 30 formed. These grooves 8, 9 cause a flow of force in the valve housing 6 and thus the lines 5 of the same
- the additional grooves 8, 9 can also be produced by means of the laser and are preferably produced during production of the injection hole 4.
- FIG. 5 shows a further alternative embodiment of the invention is shown, wherein in the precursor wall 30 no groove is provided, but in the precursor bottom 31, a first groove 8 and a second groove 10 are formed.
- the two grooves 8, 10 are in turn provided circumferentially, wherein a depth of the grooves is different.
- the first groove 8 is in this
- the two grooves 8, 10 cause such a deflection of the lines 5 equal tension that material, which is located between the two grooves 8, 10, does not have to be removed.
- FIG. 6 shows a further alternative embodiment of the invention, which does not provide a radius at the transition between wall and floor of the preliminary stage, but rather a corner. Instead of the radius is a circumferential first groove 8 in
- Pre-stage bottom 31 provided and a second circumferential groove 9 is in the
- Pre-stage wall 30 is provided.
- the grooves 8, 9 are provided relatively close to the corners without radius, so that lines of equal voltage to a long-range deflection around the corners or around the transition area between wall and floor are forced.
- the grooves 8, 9 are also preferably made by laser.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Manufacturing & Machinery (AREA)
- Plasma & Fusion (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201580018464.8A CN106164464A (zh) | 2014-04-08 | 2015-02-18 | 用于制造喷射开口以及带有这种喷射开口的燃料喷射器的方法 |
US15/302,253 US20170030315A1 (en) | 2014-04-08 | 2015-02-18 | Method for manufacturing injection openings and fuel injector having such injection openings |
KR1020167027873A KR20160140709A (ko) | 2014-04-08 | 2015-02-18 | 분사구의 제조 방법 및 이런 유형의 분사구를 구비한 연료 분사기 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102014206782.0A DE102014206782A1 (de) | 2014-04-08 | 2014-04-08 | Verfahren zur Herstellung von Einspritzöffnungen sowie Kraftstoffinjektor mit derartigen Einspritzöffnungen |
DE102014206782.0 | 2014-04-08 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2015154903A1 true WO2015154903A1 (de) | 2015-10-15 |
Family
ID=52596458
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2015/053374 WO2015154903A1 (de) | 2014-04-08 | 2015-02-18 | Verfahren zur herstellung von einspritzöffnungen sowie kraftstoffinjektor mit derartigen einspritzöffnungen |
Country Status (5)
Country | Link |
---|---|
US (1) | US20170030315A1 (de) |
KR (1) | KR20160140709A (de) |
CN (1) | CN106164464A (de) |
DE (1) | DE102014206782A1 (de) |
WO (1) | WO2015154903A1 (de) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108779702A (zh) * | 2015-10-08 | 2018-11-09 | 康明斯公司 | 预燃室组件 |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3934587A1 (de) * | 1989-10-17 | 1991-04-18 | Bosch Gmbh Robert | Verfahren zum herstellen von mittels laserstrahlung erzeugter, hochpraeziser durchgangsbohrungen in werkstuecken |
US20060097078A1 (en) * | 2004-11-05 | 2006-05-11 | Visteon Global Technologies, Inc. | Low pressure fuel injector nozzle |
US20060097087A1 (en) * | 2004-11-05 | 2006-05-11 | Visteon Global Technologies, Inc. | Low pressure fuel injector nozzle |
WO2011029941A1 (de) * | 2009-09-14 | 2011-03-17 | Continental Automotive Gmbh | Düsenbaugruppe für ein einspritzventil und einspritzventil |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7984550B2 (en) * | 2006-10-30 | 2011-07-26 | Caterpillar Inc. | Fuel injector remanufacturing method and remanufactured fuel injector |
-
2014
- 2014-04-08 DE DE102014206782.0A patent/DE102014206782A1/de active Pending
-
2015
- 2015-02-18 US US15/302,253 patent/US20170030315A1/en not_active Abandoned
- 2015-02-18 WO PCT/EP2015/053374 patent/WO2015154903A1/de active Application Filing
- 2015-02-18 CN CN201580018464.8A patent/CN106164464A/zh active Pending
- 2015-02-18 KR KR1020167027873A patent/KR20160140709A/ko unknown
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3934587A1 (de) * | 1989-10-17 | 1991-04-18 | Bosch Gmbh Robert | Verfahren zum herstellen von mittels laserstrahlung erzeugter, hochpraeziser durchgangsbohrungen in werkstuecken |
US20060097078A1 (en) * | 2004-11-05 | 2006-05-11 | Visteon Global Technologies, Inc. | Low pressure fuel injector nozzle |
US20060097087A1 (en) * | 2004-11-05 | 2006-05-11 | Visteon Global Technologies, Inc. | Low pressure fuel injector nozzle |
WO2011029941A1 (de) * | 2009-09-14 | 2011-03-17 | Continental Automotive Gmbh | Düsenbaugruppe für ein einspritzventil und einspritzventil |
Also Published As
Publication number | Publication date |
---|---|
KR20160140709A (ko) | 2016-12-07 |
CN106164464A (zh) | 2016-11-23 |
US20170030315A1 (en) | 2017-02-02 |
DE102014206782A1 (de) | 2015-10-08 |
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