EP4118316A1 - Composant pour un système d'injection et système d'injection pour des moteurs à combustion interne à allumage commandé à compression du mélange et procédé de fabrication d'un tel composant - Google Patents

Composant pour un système d'injection et système d'injection pour des moteurs à combustion interne à allumage commandé à compression du mélange et procédé de fabrication d'un tel composant

Info

Publication number
EP4118316A1
EP4118316A1 EP21701316.8A EP21701316A EP4118316A1 EP 4118316 A1 EP4118316 A1 EP 4118316A1 EP 21701316 A EP21701316 A EP 21701316A EP 4118316 A1 EP4118316 A1 EP 4118316A1
Authority
EP
European Patent Office
Prior art keywords
base body
deburring
connection
component
injection system
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
Application number
EP21701316.8A
Other languages
German (de)
English (en)
Inventor
Florian GRENZ
Frank Schneider
Goekhan Guengoer
Ralf Weber
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 EP4118316A1 publication Critical patent/EP4118316A1/fr
Pending 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
    • 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
    • F02M2200/8069—Fuel injection apparatus manufacture, repair or assembly involving removal of material from the fuel apparatus, e.g. by punching, hydro-erosion or mechanical operation
    • 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
    • F02M2200/90—Selection of particular materials
    • F02M2200/9053—Metals

Definitions

  • the invention relates to a component, in particular a fuel line or a fuel distributor, for an injection system which is used for mixture-compressing, externally ignited internal combustion engines.
  • the invention relates to the field of injection systems for motor vehicles in which fuel is injected directly into the combustion chambers of an internal combustion engine.
  • a method for producing a fuel distributor is known from DE 102016 115550 A1, in which a distributor pipe is produced from a forged blank.
  • Austenitic steels with the material numbers 1.4301, 1.4306, 1.4307 and 1.4404 can be used here. It has been recognized here that forged blanks have inherent stresses from the forging process due to their production and that the corrosion resistance is reduced by the chromium carbides that are formed.
  • the chromium carbides produced by slow cooling are dissolved again by means of a controlled heat treatment between 850 ° C. and 1100 ° C. for more than 60 seconds. The mechanical properties and corrosion resistance are thereby improved. Since the heat treatment also improves the machining properties for drilling, milling and thread cutting, the heat treatment is preferably carried out on the unmachined forging blank.
  • 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 8 as well as the method according to the invention according to claim 9 have the advantage that an improved design and functionality are made possible.
  • the measures listed in the subclaims allow advantageous developments of the component specified in claim 1, the injection system specified in claim 8 and the method specified in claim 9.
  • the injection system according to the invention is used for mixture-compressing, externally ignited internal combustion engines.
  • the injection system according to the invention is used to inject gasoline and / or ethanol and / or comparable fuels and / or to inject a mixture with gasoline and / or ethanol and / or comparable fuels.
  • a mixture can, for example, be a mixture with water.
  • the component according to the invention is used for such injection systems.
  • At least the base body of the component is made from a material that is preferably a stainless steel, in particular an austenitic stainless steel.
  • the material can be based on an austenitic stainless steel with the material number 1.4301 or 1.4307 or on a stainless steel comparable to this.
  • a hydraulic connection provided on the base body can be designed as a high pressure inlet, high pressure outlet or other high pressure connection.
  • the base body is then preferably formed as a forged blank together with the high pressure inlet and the at least one high pressure outlet and optionally one or more other high pressure connections during manufacture and further processed.
  • a pipe for the soldering trail is machined and deburred before the add-on components are soldered on.
  • the forged design enables a design for higher pressures in particular.
  • An essential difference to a high pressure rail for compression ignition internal combustion engines consists in the choice of material and the processing, in particular in the forging of a stainless steel.
  • electrochemical deburring ECM deburring
  • a separate system and a subsequent cleaning process are required, which account for a not inconsiderable part of the manufacturing costs.
  • the proposed mechanical deburring can easily follow a machining process and, in particular, can be carried out in the same machining center. This applies in particular to a retraction deburring proposed according to the advantageous development of claim 2, since one or more retraction deburrers are in can advantageously be integrated into the machining process.
  • the production can be simplified and the unit cost can be reduced.
  • the mechanical deburring enables reliable process control.
  • ECM deburring for example, when an electrode is energized by a contact between the electrode and a burr to be removed, a short circuit could occur if the burr to be removed is too large, whereby the process would come to a standstill without material removal. This problem arises in particular with the proposed austenitic stainless steels, since these are comparatively difficult to machine.
  • FIG. 1 shows an injection system for a mixture-compressing, externally ignited internal combustion engine with a component designed as a fuel distributor in a schematic sectional illustration according to an exemplary embodiment of the invention
  • FIG. 2 shows the section of the component designated by II in FIG. 1 according to the exemplary embodiment in a detailed, schematic illustration
  • FIG. 3 shows the detail of the component, designated III in FIG. 1, corresponding to the exemplary embodiment in a detailed, schematic illustration in a section perpendicular to a longitudinal axis of the component and
  • FIG. 3 shows the detail of the component, designated III in FIG. 1, corresponding to the exemplary embodiment in a detailed, schematic illustration in a section perpendicular to a longitudinal axis of the component and
  • FIG. 3 shows the detail of the component, designated III in FIG. 1, corresponding to the exemplary embodiment in a detailed, schematic illustration in a section perpendicular to a longitudinal axis of the component
  • FIG. 4 shows a schematic representation of a mechanical deburring of an intersection area to explain a possible embodiment of the invention.
  • the fuel distributor 2 of the fuel injection system 1 is a component 3 designed according to the invention.
  • a high-pressure pump 4 is provided.
  • the high-pressure pump 4 is connected to the fuel distributor 2 via a fuel line 5 designed as a high-pressure line 5.
  • a fuel or a mixture with fuel is supplied as a fluid during operation.
  • the high-pressure line 5 can also be designed as a component 3 'according to the invention in a corresponding manner.
  • the fuel distributor 2 serves to store and distribute the fluid to injection valves 7 to 10 designed as fuel injection valves 7 to 10 and reduces pressure fluctuations and pulsations.
  • the fuel distributor 2 can also serve to dampen pressure pulsations that can occur when the fuel injectors 7 to 10 are switched.
  • high pressures p can occur in an interior space 11 of the component 3, at least at times.
  • the high-pressure line 5 has hydraulic connections 12, 12 'designed as high-pressure inlet 12 and high-pressure outlet 12', which can optionally be interchanged, as well as a base body 13.
  • the fuel distributor 2 has a tubular base body 14 which is formed by forging in one or more stages.
  • a hydraulic connection 15 designed as a high pressure inlet 15 and a plurality of hydraulic connections 16 to 19 designed as high pressure outlets 16 to 19 or cups 16 to 19 are provided on the tubular base body 14.
  • a hydraulic connection 20 designed as a pressure sensor connection 20 is provided on the tubular base body 14.
  • the tubular base body 14, the high pressure inlet 15, the high pressure outlets 16 to 19 and the pressure sensor connection 20 are formed from a forged individual part 14 ′. The high pressure inlet 15, the high pressure outlets 16 to 19 and the pressure sensor connection 20 are thus forged onto the base body 14.
  • the fuel line 5 is connected at its high pressure inlet 12 to the high pressure pump 4 and at its high pressure outlet 12 ′ to the high pressure inlet 15 of the fuel distributor 2.
  • the fuel injectors 7 to 10 are each connected to the high pressure outlets 16 to 19 of the fuel distributor 2.
  • a pressure sensor 21 is provided which is connected to the pressure sensor connection 20.
  • the tubular base body 14 is closed by a screw plug 23.
  • an axial high pressure inlet can be provided at one end 24 instead of the lateral and / or radial high pressure inlet 15.
  • the tubular base body 14 or the forged individual part 14 ' is machined by at least one machining process.
  • a bore 25 is also formed in the tubular base body 14 after forging in order to form the interior space 11.
  • the fluid supplied at the high pressure inlet 15 can be distributed to the fuel injection valves 7 to 10 connected to the high pressure outlets 16 to 19 via the interior 11.
  • bores 26 to 31 are made in the forged individual part 14 'by machining.
  • the holes 27 to 30 are used for the high pressure outlets 16 to 19.
  • the hole 26 is used for the high pressure inlet 15.
  • the hole 31 is used for the pressure sensor connection 20 get cut.
  • bores 32 to 37 can be provided at the high pressure inlet 15, the high pressure outlets 16 to 19 and the pressure sensor connection 20, which form connection spaces 32 to 37.
  • the bore 25 is oriented axially with respect to a longitudinal axis 38.
  • the bores 26 to 37 are oriented radially or radially eccentrically with respect to the longitudinal axis 38.
  • an orientation of the bores 26, 31, 32, 37 of the connections 15, 20 or the bores 27 to 30, 33 to 36 can be preferred of the connections 16 to 19 above or below the longitudinal axis and / or from the longitudinal axis 38 pointing away from or pointing towards a motor.
  • Connection channels 26 to 31 that are intersected with the interior space 11 are formed by the bores 26 to 31. These connection channels 26 to 31 connect the bores 32 to 37 with the interior space 11. Here, the bores 26 to 31 are intersected with the bore 25 which forms the interior space 11. This results in intersection areas 40 to 45 on which burrs remain after the machining. The intersection areas 40 to 45 are deburred by mechanical deburring.
  • connections 15, 20 is described by way of example with reference to connection 15 with reference to FIG. 2.
  • One possible configuration of the connections 16 to 19 is described by way of example with reference to the connection 16 with reference to FIG. 3.
  • One possible configuration for mechanical deburring is described with reference to FIG. 4. This results in a possible configuration of a component 3 which is configured in accordance with an exemplary embodiment of the invention.
  • another component 3 'of the injection system 1 can also be implemented, for example the high-pressure line 5, with the connections 12, 12' being designed and mechanically deburred in a corresponding manner.
  • FIG. 2 shows the section of component 3, designated II in FIG. 1, corresponding to the exemplary embodiment in a detailed, schematic illustration.
  • a conical and / or step-shaped transition 46 is provided for bores 26, 32.
  • the bores 26, 32 can be arranged coaxially in this case.
  • a suitable thread can also be implemented on the connection 15 in order to connect the high-pressure line 5, for example.
  • intersection region 40 can be carried out from the bore 32, as is also explained with reference to FIG. 4. As a result, a bevel 40 ′ can be formed on the intersection area 40.
  • FIG. 3 shows the section of component 3 designated III in FIG. 1 according to the exemplary embodiment in a detailed, schematic representation in a section perpendicular to longitudinal axis 38 33 is arranged eccentrically to the bore 27.
  • the bore 27 can be oriented radially to the longitudinal axis 38.
  • the bore 33 is then oriented radially eccentrically with respect to the longitudinal axis 38.
  • the deburring of the intersection area 41 can take place from the bore 33, as is illustrated with reference to FIG. 4.
  • a bevel 4 can be formed on the intersection area 41.
  • connection 15 can thus be designed in the form of a valve cup 15.
  • FIG. 4 shows a schematic illustration of mechanical deburring of an intersection region 40 by means of a return deburring tool 50 to explain a possible embodiment of the invention.
  • the bores 25, 26 are intersected with one another in the intersection region 40.
  • the return deburring tool 50 can be fed in via the bore 32 (FIG. 2) along an axis 51.
  • the retraction deburring tool 50 has at least one cutting edge 52. During the feeding process, the cutting edge 52 is fully or partially folded into a jacket surface 53 of the return deburring tool 50.
  • the cutting edge 52 can be folded out by means of a rotation 54 and / or by applying a cooling lubricant, which can be supplied via the return deburring tool 50.
  • the rotation 54 results in a mechanical deburring of the intersection area 40 by means of the cutting edge 52.
  • the rotation 54 and / or the supplied liquid cooling lubricant causes the cutting edge 52 to move against the intersection area 40 applied.
  • the bevel 40 ' can be formed in this case.
  • the return deburring tool 50 can then be removed, the cutting edge 52 fully or partially folding back into the lateral surface 53.
  • the cutting edge 52 can also be held, for example, by a spring in order to facilitate the introduction and removal of the return deburring tool 50.
  • the timing of the machining for the design of the bores 25 to 37 can be implemented in a suitable manner.
  • the mechanical deburring of the intersection areas 40 to 45 can be integrated into this processing or connected to it in a suitable manner.
  • the bore 25 for the configuration of the interior 11 can first be drilled.
  • the bores 32 to 37 for the connection geometries of the connections 15 to 20 can then be drilled and the bores 26 to 31 serving as connection channels 26 to 31 to the interior 11 can be drilled.
  • the intersection areas 40 to 45 can then be mechanically deburred. Mechanical deburring can thus follow the machining process.
  • connection geometries are machined, in particular all bores 32 to 37 are drilled, then all bores 26 to 31 serving as connection channels 26 to 31 or as connection bores 26 to 31 are drilled and finally all intersection areas 40 to 45 mechanically deburred.
  • a possible modification of this process is that a different sequence is implemented for drilling and deburring, which integrates the deburring into the machining process.
  • a processing sequence can relate to one of the connections 15 to 20 in each case. This means, for example at the connection 15, that the bore 32 drilled, then drilled the bore 26 and then the mechanical deburring of the intersection area 40 takes place. These steps can be carried out one after the other for each of the connections 15 to 20 in a corresponding manner.
  • mechanical deburring does not necessarily take place after the machining process has been completed.
  • mechanical deburring can thus also be integrated into the machining process.
  • an inner wall 60 extending from the bore 25 over the intersection area 40 and through the bore 26 is configured with a material condition subject to compressive residual stress.
  • This inner wall 60 can also extend into the transition 46 (FIG. 2) or the hole bottom 47 (FIG. 3) and at least partially over the holes 32 to 37.
  • the configuration of the inner wall 60 with the material condition subject to compressive residual stress results in an improved cyclic strength.

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)
  • Forging (AREA)

Abstract

L'invention concerne un composant (3 ; 3') pour un système d'injection (1) pour des moteurs à combustion interne à allumage commandé à compression du mélange, ledit composant étant destiné à doser un fluide se trouvant sous haute pression, en particulier une conduite à haute pression (5) ou un distributeur de fluide (2) , ledit composant comportant un corps de base (14 ; 13) sur lequel se situe au moins un raccord hydraulique (15 - 20), au moins le corps de base (14 ; 13) conjointement avec le raccord (15 - 20) étant réalisé par forgeage en une ou en plusieurs étapes, un espace intérieur (11) étant ménagé sur le corps de base (14 ; 13) par un usinage par enlèvement de copeaux après le forgeage, et un conduit de raccordement (26 - 31), coupé par l'espace intérieur (11) dans une zone d'intersection (40 - 45), étant réalisé sur le raccord (15 - 20) par un usinage par enlèvement de copeaux après le forgeage. Selon l'invention, la zone d'intersection (40 - 45) est ébavurée par ébavurage mécanique. L'invention concerne en outre un système d'injection (1) et un procédé de fabrication d'un tel composant (3 ; 3').
EP21701316.8A 2020-03-12 2021-01-21 Composant pour un système d'injection et système d'injection pour des moteurs à combustion interne à allumage commandé à compression du mélange et procédé de fabrication d'un tel composant Pending EP4118316A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102020203174.6A DE102020203174A1 (de) 2020-03-12 2020-03-12 Komponente für eine Einspritzanlage und Einspritzanlage für gemischverdichtende, fremdgezündete Brennkraftmaschinen sowie Verfahren zur Herstellung solch einer Komponente
PCT/EP2021/051310 WO2021180390A1 (fr) 2020-03-12 2021-01-21 Composant pour un système d'injection et système d'injection pour des moteurs à combustion interne à allumage commandé à compression du mélange et procédé de fabrication d'un tel composant

Publications (1)

Publication Number Publication Date
EP4118316A1 true EP4118316A1 (fr) 2023-01-18

Family

ID=74205873

Family Applications (1)

Application Number Title Priority Date Filing Date
EP21701316.8A Pending EP4118316A1 (fr) 2020-03-12 2021-01-21 Composant pour un système d'injection et système d'injection pour des moteurs à combustion interne à allumage commandé à compression du mélange et procédé de fabrication d'un tel composant

Country Status (8)

Country Link
US (1) US11828255B2 (fr)
EP (1) EP4118316A1 (fr)
JP (1) JP2023516816A (fr)
KR (1) KR20220148280A (fr)
CN (1) CN115280010A (fr)
DE (1) DE102020203174A1 (fr)
MX (1) MX2022011271A (fr)
WO (1) WO2021180390A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102020203174A1 (de) * 2020-03-12 2021-09-16 Robert Bosch Gesellschaft mit beschränkter Haftung Komponente für eine Einspritzanlage und Einspritzanlage für gemischverdichtende, fremdgezündete Brennkraftmaschinen sowie Verfahren zur Herstellung solch einer Komponente

Family Cites Families (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9207000U1 (fr) 1992-05-23 1993-06-24 Heule, Heinrich, Au, Ch
DE10001507A1 (de) * 2000-01-15 2001-07-19 Bosch Gmbh Robert Verfahren zur Einbringung einer Durchgangsöffnung in einen Kraftstoffhochdruckspeicher und Vorrichtung zur Durchführung des Verfahrens
DE10239379B4 (de) * 2002-08-25 2005-02-03 Umformtechnik Bäuerle GmbH Verfahren zur Bearbeitung eines Werkstücks für einen Kraftstoffhochdruckspeicher und Werkstück zur Anwendung des Verfahrens
DE10305078A1 (de) * 2003-02-07 2004-04-22 Robert Bosch Gmbh Kraftstoffhochdruckspeicher
DE102005048078A1 (de) 2005-10-07 2007-04-12 Daimlerchrysler Ag Verfahren zum elektrochemischen Bearbeiten eines Werkstücks
JP5029621B2 (ja) 2009-01-07 2012-09-19 株式会社デンソー 管状部材の製造方法
EP3196457A4 (fr) 2014-09-17 2018-05-02 Hitachi Automotive Systems, Ltd. Rampe de carburant
JP6656998B2 (ja) 2016-04-07 2020-03-04 株式会社オティックス フューエルデリバリパイプの製造方法
DE102016211228A1 (de) 2016-06-23 2017-12-28 Robert Bosch Gmbh Hochdruck-Kraftstoffpumpe mit einem Gehäuse und Verfahren zum Bearbeiten von Kanälen eines Gehäuses einer Hochdruck-Kraftstoffpumpe
DE102016115550B4 (de) 2016-08-22 2018-05-30 Benteler Automobiltechnik Gmbh Verfahren zur Herstellung eines Kraftstoffverteilers
JP6969128B2 (ja) 2017-03-23 2021-11-24 株式会社デンソー 配管部品の製造方法、および配管部品の製造装置
DE102017111736A1 (de) 2017-05-30 2018-12-06 Adalbert Mattes Entgratungswerkzeug für Radialbohrungen und hierfür passender Schneidkörper
DE102020203174A1 (de) * 2020-03-12 2021-09-16 Robert Bosch Gesellschaft mit beschränkter Haftung Komponente für eine Einspritzanlage und Einspritzanlage für gemischverdichtende, fremdgezündete Brennkraftmaschinen sowie Verfahren zur Herstellung solch einer Komponente
DE102020203650A1 (de) * 2020-03-20 2021-09-23 Robert Bosch Gesellschaft mit beschränkter Haftung Komponente für eine Einspritzanlage und Einspritzanlage für gemischverdichtende, fremdgezündete Brennkraftmaschinen
DE102020207472A1 (de) * 2020-06-17 2021-12-23 Robert Bosch Gesellschaft mit beschränkter Haftung Komponente für eine Einspritzanlage und Einspritzanlage für gemischverdichtende, fremdgezündete Brennkraftmaschinen
DE102020208768A1 (de) * 2020-07-14 2022-01-20 Robert Bosch Gesellschaft mit beschränkter Haftung Brennstoffverteilerleiste für eine Einspritzanlage und Einspritzanlage für gemischverdichtende, fremdgezündete Brennkraftmaschinen
DE102020208759A1 (de) * 2020-07-14 2022-01-20 Robert Bosch Gesellschaft mit beschränkter Haftung Komponente für eine Einspritzanlage und Einspritzanlage für gemischverdichtende, fremdgezündete Brennkraftmaschinen sowie Verfahren zur Herstellung solch einer Komponente
DE102020213168A1 (de) * 2020-10-19 2022-04-21 Robert Bosch Gesellschaft mit beschränkter Haftung Fluidverteiler für eine Einspritzanlage und Einspritzanlage für gemischverdichtende, fremdgezündete Brennkraftmaschinen

Also Published As

Publication number Publication date
JP2023516816A (ja) 2023-04-20
WO2021180390A1 (fr) 2021-09-16
KR20220148280A (ko) 2022-11-04
US11828255B2 (en) 2023-11-28
MX2022011271A (es) 2022-10-03
CN115280010A (zh) 2022-11-01
US20230099915A1 (en) 2023-03-30
DE102020203174A1 (de) 2021-09-16

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