EP4038269A1 - Component for an injection system, in particular fuel distributor strip, injection system and method for producing such a component - Google Patents
Component for an injection system, in particular fuel distributor strip, injection system and method for producing such a componentInfo
- Publication number
- EP4038269A1 EP4038269A1 EP20785936.4A EP20785936A EP4038269A1 EP 4038269 A1 EP4038269 A1 EP 4038269A1 EP 20785936 A EP20785936 A EP 20785936A EP 4038269 A1 EP4038269 A1 EP 4038269A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- forging
- base body
- component
- injection system
- fastening element
- 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.)
- Pending
Links
- 238000002347 injection Methods 0.000 title claims abstract description 32
- 239000007924 injection Substances 0.000 title claims abstract description 32
- 239000000446 fuel Substances 0.000 title claims abstract description 25
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 7
- 238000005242 forging Methods 0.000 claims abstract description 91
- 239000000463 material Substances 0.000 claims description 41
- 238000000034 method Methods 0.000 claims description 12
- 238000004080 punching Methods 0.000 claims description 6
- 238000011161 development Methods 0.000 description 5
- 230000018109 developmental process Effects 0.000 description 5
- 239000012530 fluid Substances 0.000 description 5
- 238000009826 distribution Methods 0.000 description 4
- 238000002485 combustion reaction Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 235000021190 leftovers Nutrition 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000004069 differentiation Effects 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
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
- F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
- F02M55/02—Conduits between injection pumps and injectors, e.g. conduits between pump and common-rail or conduits between common-rail and injectors
- F02M55/025—Common rails
-
- 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
Definitions
- Components for an injection system in particular the fuel rail,
- the invention relates to a component, in particular a fuel rail, for a fuel injection system, a method for producing a base body for such a component, and an injection system.
- the invention relates to the field of fuel injection systems, which are preferably used for mixture-compressing, spark-ignited internal combustion engines, the fuel rail being arranged, for example, in an engine compartment of a motor vehicle and used for direct injection of fuel into combustion chambers of the internal combustion engine.
- JP 2018-158372 A it is known to produce a base body for a distributor bar by forging.
- the material is forged eccentrically, so that several connection elements that are drilled after forging and two fastening elements that are also drilled after forging are formed by forging on the forged base body.
- the fastening elements formed by forging on the base body and then drilled are of high strength, so that the entire distribution strip can be reliably mounted and fastened with suitable attachments, for example on a cylinder head in an engine compartment.
- JP 2018-158372 A has the disadvantage that the amount of material to be processed by forging increases by an additional amount of material for the fastening elements.
- This known implementation of the fastening elements is expensive, especially if the base body is to be made from high-quality steel.
- the component according to the invention with the features of claim 1 and the injection system according to the invention with the features of claim 7 have the advantage that an improved design and functionality are made possible.
- a fastening option can be implemented with optimized effort.
- corresponding advantages and improved production can be achieved.
- the proposed injection system can in particular be designed as a fuel injection system which is used to inject a fuel or a mixture with at least one fuel.
- an injection system can serve not only for liquid fluids, but also, if necessary, enable gaseous fluids, in particular combustible gases, to be injected.
- the fastening element can be formed at least partially by a remnant of a forged burr.
- a forging burr remainder is created by a special design and combination of forging and a subsequent only partial removal of a forging burr created during forging. Since the forged burr is only partially removed here, a residue remains at at least one point, which is then used to form the fastening element. It is conceivable here that the fastening element is partially predetermined by the forging and only partially formed by such a remnant of a forged burr. However, such a fastening element is preferably formed at least essentially by the remainder of the forging ridge remaining there, as indicated in claim 2.
- the injection system is designed, for example, as a fuel injection system for motor vehicles, then there is usually the need to fasten the injection system in the engine compartment, in particular on a cylinder head, with high loads occurring.
- high-strength fastening elements are usually provided on the injection system, via which the fastening to, for example, the Cylinder head takes place.
- assembly points are also referred to here as assembly points.
- the assembly points in the case of a fuel distribution rail must therefore withstand high loads, so that they have to be forged, for example.
- the proposed fastening elements are suitable for lower loads, so that they do not have to be formed by forging.
- the material for producing a component via the forging process can be cut to length from a round material, for example. The amount of material then results with a certain tolerance.
- the cut material is placed in a press, which can consist of a lower half of the die and an upper half of the die.
- the die halves provide a contour for the forging process, which defines the forged shape of the base body. Even at the lower end of the tolerance, it must be possible to fill the contour to 100% during forging. Since the contour for the base body varies locally and can, for example, provide eccentricities or a local additional material requirement, there is usually a locally varying amount of material that is displaced between the die halves into a gap serving to accommodate displaced material.
- the forging contour can be achieved reliably in one or more forging stages. So that the forging contour is reliably achieved, there is inevitably a forging burr.
- a major influencing factor on the respective size of the forging burr is the amount of material that varies within the tolerance range due to the cutting to length. Another important influencing variable is the extent of local fluctuations in the amount of material on the base body, which are caused, for example, by eccentricities.
- An essential aspect of the proposed solution is therefore to produce assembly points only for high loads, such as attachment to a cylinder head, by forging.
- fastening elements are implemented in the manner proposed.
- the forging burr which is formed anyway as a result of the process is used in an advantageous manner in order to implement one or more fastening elements.
- Suitable add-on parts such as a plug, a cable or a cable duct, can then be attached to such fastening elements.
- the further development according to claim 3 has the advantage that the through opening can be punched out with an existing tool, which can be done together with the rest of the separated forging burr.
- FIG. 1 shows material with a forging ridge after forging during the manufacture of a component for an injection system designed as a fuel injection system in a schematic illustration corresponding to a first exemplary embodiment of the invention
- FIG. 2 shows the component which, after further processing, in particular stamping, is produced from the material shown in FIG. 1, in a schematic representation corresponding to the first exemplary embodiment of the invention
- FIG. 3 shows a lower die for producing the forged material shown in FIG. 1 for the component according to the first embodiment of the invention
- FIG. 4 shows the lower die shown in FIG. 3 together with an upper die to illustrate the forging of the material shown in FIG. 1 in accordance with the first exemplary embodiment of the invention
- 5 shows a deburring tool for further processing of the material shown in FIG. 1 in accordance with the first exemplary embodiment of the invention in a partial, schematic illustration
- FIG. 6 shows an excerpt of the material shown in FIG. 1 to explain a preferred local arrangement of fastening elements on a base body of the component for an optimized lowering position
- FIG. 7 shows the component shown in FIG. 2 in an excerpt view corresponding to a second exemplary embodiment of the invention.
- a component 1 can be designed as a fuel distribution rail 1 and serve for a fuel injection system in which a fluid is distributed to preferably several fuel injection valves.
- Component 1 is preferably designed in such a way that there is a very high load-bearing capacity in relation to a pressure of the fluid that is stored within component 1 and distributed, for example, to fuel injectors.
- the component 1 is realized as a forged component 1, so that high loads in relation to the pressure of the fluid are possible. Therefore, a component 1 is considered here, the base body 2 of which is forged.
- FIG. 1 shows a material 3 from which the component 1 is produced in a schematic representation corresponding to a first exemplary embodiment.
- the base body 2 is forged here. Furthermore, not only the base body 2, but also a forging burr 4 from the material 3 on the base body 2 is produced during forging. Strictly speaking, FIG. 1 does not yet show the finished component 1, but the material 3 which is processed by forging and here is formed in the base body 2 and the forging line 4.
- the desired shape of the base body 2 can be predetermined in a complex manner.
- the base body 2 has a tubular part 5, which is also provided with a longitudinal bore 8 along a longitudinal axis 9 in order to form an interior 7 (FIG. 2).
- the base body 2 has eccentricities 10, 11, from which high-strength fastening elements (assembly points) 12, 13 (Fig. 2) are formed.
- there is a locally increased material requirement for example, when viewed along the longitudinal axis 9.
- eccentricities 18, 19 are formed on the base body 2, from which, for example, cups 20, 21 for connecting the fuel injection valves can be formed.
- such eccentricities 10, 11, 18, 19 are to be regarded as largely predetermined in terms of their number, their material requirements and their arrangement.
- areas 14, 15 on the forging ridge 4 in which the forging ridge 4 is comparatively pronounced.
- the area 15 is chosen to illustrate how a fastening element 25 (FIG. 2) can be formed in the proposed manner by a remnant forging 26, which in the illustration in FIG. 1 is still part of the entire forging 4.
- FIG. 2 shows the component 1, which is produced from the material 3 shown in FIG. 1 after further processing, in particular stamping, in a schematic illustration corresponding to the first exemplary embodiment.
- the forging burr 4 that is no longer required is separated by punching, although the forging burr remainder 26 is left on the base body 2.
- a through-opening 27 is formed on the remnant of forging 26. This can be done, for example, after punching in a further processing step, for example by drilling. However, it is also conceivable that the punching of the through opening 27 takes place in the same processing step as the removal of the forging burr 4 that is not required.
- bores 28, 29 are formed at the eccentricities 10, 11 in order to realize the assembly points 12, 13. Since the assembly points 12, 13 are integrally formed on the forged base body 2, they can withstand high loads. The assembly points 12, 13 are therefore particularly suitable for fastening the component 1, which can include the base body 2 and further elements, to a cylinder head. Compared to the assembly points 12, 13, the fastening element 25 can only be subjected to low loads.
- the fastening element 25 can generally be dimensioned in such a way that at least one attachment part of the component 1, in particular a plug and / or a cable and / or a cable duct, can be fastened to it.
- two or more such fastening elements 25 can also be implemented in suitable areas, for example also in the area 14, on the base body 2 by forging leftovers corresponding to the forging leftovers 26.
- the forging burr 4 is created anyway during forging as a result of the process.
- the fastening element 25 for example, no additional material is required with regard to the material 3 to be formed during forging.
- the fastening element 25 can then only be subjected to a comparatively low load, but can be implemented without additional material requirements.
- the strength of the fastening element 25 can be predetermined within certain limits by the dimensioning of the remnant forging frame 26.
- the eccentricities 10, 11, 18, 19 result in areas 30A to 30D on the base body 2 with a locally increased material requirement during forging.
- the area 15 is arranged outside of these areas 30A to 30D on the base body 2, so that the forging flash 4 there has sufficiently large dimensions to realize the forging flash residue 26 in the desired dimensions.
- FIG. 3 shows a lower die 35 for producing the forged material 3 shown in FIG. 1 for the component 1 according to the first exemplary embodiment.
- FIG. 4 shows the lower die 35 shown in FIG. 3 together with an upper die 36 to illustrate a forging tool 37 which is used for forging the material 3 shown in FIG. 1 in accordance with the first exemplary embodiment.
- a half-mold 38A for the base body 2 is essentially formed in the lower die 35.
- the other half-mold 38B is formed in the upper die 36.
- the forging tool 37 is shown in a simplified manner.
- a plurality of half-molds can also be formed in each of the dies 35, 36, the material 3 to be forged being turned over in the forging tool 37 in accordance with the forging stages.
- Stepped areas 39A are formed in the dies 35, 36, as a result of which a gap 40 remains during forging.
- the gap 40 enables the excess material to be displaced during forging, as a result of which the forging flash 4 is formed.
- a gap height 41 here specifies a (mean) thickness 42 of the forging burr 4 that is produced.
- FIG. 5 shows a deburring tool 50 for further processing of the material 3 shown in FIG. 1 corresponding to the first exemplary embodiment in a partial, schematic illustration.
- the deburring tool has a cutting line 51 which is adapted with respect to the forging debris 26, as a result of which, with the exception of the forging debris 26, which remains on the base body 2, the remaining forging 4 that is not required is removed.
- FIG. 6 shows a partial illustration of the material 3 shown in FIG. 1 to explain a preferred local arrangement of at least one fastening element 25 on the base body 2 of the component 1 for an optimized lowering position.
- the position of the remnant of forged burrs 26 is selected in an area 15 with a large burr formation.
- a profile 52 of the material 2 including the formed forging flash 4 in a plane perpendicular to the longitudinal axis 9 is illustrated by a broken line 52.
- the forging burr remainder 26 with the thickness 42 of the forging burr 4 can be realized by the selection. This applies to the entire radial extent of the remnant forging 26.
- FIG. 7 shows the component 1 shown in FIG. 2 in an excerpt view corresponding to a second exemplary embodiment.
- the gap 40 illustrated in FIG. 4 can also be formed with different gap heights 41 along the workpiece geometry of the base body 2, depending on the workpiece contour of the desired base body 2.
- the filling behavior of the cavity of the forging tool 37 predetermined by the half-molds 38A, 38B can be controlled. This can lead to the fact that in the area 15 in which the remnant forging 26 is placed, an average thickness of the remainder of the forging 26 is greater or smaller than an average thickness 42 of the forging 4 formed during forging.
- the base body 2 can be processed in further steps.
- cutouts can be provided on the eccentricities 18, 19 in order to design the cups 20, 21.
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
TR2019/14989A TR201914989A2 (en) | 2019-10-02 | 2019-10-02 | Component for an injection system, particularly a fuel rail, injection system, and method for manufacturing such a component. |
PCT/EP2020/077170 WO2021063911A1 (en) | 2019-10-02 | 2020-09-29 | Component for an injection system, in particular fuel distributor strip, injection system and method for producing such a component |
Publications (1)
Publication Number | Publication Date |
---|---|
EP4038269A1 true EP4038269A1 (en) | 2022-08-10 |
Family
ID=72744746
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP20785936.4A Pending EP4038269A1 (en) | 2019-10-02 | 2020-09-29 | Component for an injection system, in particular fuel distributor strip, injection system and method for producing such a component |
Country Status (7)
Country | Link |
---|---|
US (1) | US11821398B2 (en) |
EP (1) | EP4038269A1 (en) |
JP (1) | JP2022550605A (en) |
CN (1) | CN114729616A (en) |
MX (1) | MX2022003862A (en) |
TR (1) | TR201914989A2 (en) |
WO (1) | WO2021063911A1 (en) |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
IT214868Z2 (en) | 1988-09-30 | 1990-07-04 | Weber Srl | SEMI-FINISHED TO CREATE A FUEL SUPPLY MANIFOLD FOR AN INTERNAL COMBUSTION ENGINE POWER SUPPLY |
JP2002011540A (en) * | 2000-06-28 | 2002-01-15 | Kobe Steel Ltd | Method and tool for manufacturing forged aluminum alloy parts for automobile |
US7603985B2 (en) * | 2007-01-25 | 2009-10-20 | Denso Corporation | Common rail |
KR101027791B1 (en) * | 2009-08-11 | 2011-04-07 | 주식회사 케피코 | structure for mounting for GDI fuel-rail |
JP5912410B2 (en) * | 2011-10-26 | 2016-04-27 | トヨタ自動車株式会社 | Fuel delivery pipe fastening structure |
DE102015120962B4 (en) * | 2015-12-02 | 2020-09-24 | Benteler Automobiltechnik Gmbh | Fuel rail and method of making a fuel rail |
DE202015106569U1 (en) | 2015-12-02 | 2016-01-07 | Benteler Automobiltechnik Gmbh | Fuel distributor |
JP6969128B2 (en) | 2017-03-23 | 2021-11-24 | 株式会社デンソー | Piping parts manufacturing method and piping parts manufacturing equipment |
US11274642B1 (en) * | 2021-08-31 | 2022-03-15 | Denso International America, Inc. | Fuel rail assembly |
-
2019
- 2019-10-02 TR TR2019/14989A patent/TR201914989A2/en unknown
-
2020
- 2020-09-29 MX MX2022003862A patent/MX2022003862A/en unknown
- 2020-09-29 EP EP20785936.4A patent/EP4038269A1/en active Pending
- 2020-09-29 JP JP2022520750A patent/JP2022550605A/en active Pending
- 2020-09-29 CN CN202080069677.4A patent/CN114729616A/en active Pending
- 2020-09-29 WO PCT/EP2020/077170 patent/WO2021063911A1/en unknown
- 2020-09-29 US US17/641,236 patent/US11821398B2/en active Active
Also Published As
Publication number | Publication date |
---|---|
CN114729616A (en) | 2022-07-08 |
US20220325685A1 (en) | 2022-10-13 |
TR201914989A2 (en) | 2021-04-21 |
MX2022003862A (en) | 2022-07-12 |
WO2021063911A1 (en) | 2021-04-08 |
US11821398B2 (en) | 2023-11-21 |
JP2022550605A (en) | 2022-12-02 |
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