EP2960486A1 - Procédé de réduction de la tension sur une découpe de deux canaux débouchant l'un dans l'autre - Google Patents

Procédé de réduction de la tension sur une découpe de deux canaux débouchant l'un dans l'autre Download PDF

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Publication number
EP2960486A1
EP2960486A1 EP15170032.5A EP15170032A EP2960486A1 EP 2960486 A1 EP2960486 A1 EP 2960486A1 EP 15170032 A EP15170032 A EP 15170032A EP 2960486 A1 EP2960486 A1 EP 2960486A1
Authority
EP
European Patent Office
Prior art keywords
channel
channels
pocket
junction
reducing
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
EP15170032.5A
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German (de)
English (en)
Other versions
EP2960486B1 (fr
Inventor
Gerhard Girlinger
Marcela Haberlova
Horst Rosenkranz
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
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Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP2960486A1 publication Critical patent/EP2960486A1/fr
Application granted granted Critical
Publication of EP2960486B1 publication Critical patent/EP2960486B1/fr
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Anticipated expiration legal-status Critical

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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
    • F02M55/008—Arrangement of fuel passages inside of injectors
    • 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 invention relates to a method for reducing the stress on an intersection of two channels merging into one another in a body made of a metallic material, wherein a high-pressure medium is guided in the channels, and a first channel opens into a second channel. Furthermore, the invention relates to a device which causes a reduction in the voltage at an intersection of two merging channels.
  • annular recess is recessed, the Alternatively, it may be formed in the form of two opposite kidney-shaped depressions.
  • the circular or kidney-shaped depressions have in common that they are difficult to manufacture and at least partially can only be produced by a very expensive etching process.
  • the invention is based on the object of specifying a method for reducing the voltage of an intersection of two channels which merge into one another, which, with simple manufacturability, effectively reduces the stresses or shifts them into system-uncritical regions. Furthermore, a corresponding device is provided, with which the voltage is reduced at an intersection.
  • a pocket is arranged on both sides of an opening of the second channel in the first channel.
  • These two pockets can be made much easier compared to an annular recess or two kidney-shaped depressions and thereby ensure a reliable reduction or displacement of stresses in non-systemic areas outside the intersection.
  • the pockets can be arranged in a basically axial orientation parallel or inclined to the first channel on both sides of the junction of the second channel.
  • the respective pocket is mechanically incorporated into the body. Mechanical incorporation is precise, accurate and reproducible.
  • the respective pocket is incorporated into the body by means of a ball drill.
  • a ball drill in a first processing form of the ball drill inclined or parallel to the first channel directly adjacent to the junction or in the region of Junction formed second channel intersection to the first channel in the body aligned and introduced from a mouth end of the first channel into an area below the intersection in the body.
  • a second machining shape provides to drive a tool having an angular drive in the first channel up to the level of the junction of the second channel and then move the ball drill radially to the intersection, so as to manufacture the two pockets.
  • the production of the two bags is preferably carried out sequentially and the pockets can be produced by means of a program-controlled machine tool.
  • the pockets can also be etched into the body, which is preferably done by an electrochemical etching process. It should be noted that the pockets of the invention are much easier than the known from the prior art kidney-shaped depressions are etched into the body.
  • the first channel is a longitudinal bore, which is embedded in the body.
  • the second channel is an inlet bore, which can preferably open tangentially but also at an angle of 0 ° (normal to the longitudinal bore) in the axially bored in the body longitudinal bore.
  • a corresponding device which is designed to reduce the voltage at an intersection, is formed by (axial) pockets arranged on both sides of the junction of the second channel in the first channel.
  • a corresponding body, in which the channels are embedded can basically be any high-pressure medium of leading bodies.
  • the body is preferably part of an injector of an injection system, in particular of a fuel injection system.
  • the fuel injection system is preferably designed as a common-rail injection system, wherein the injector is taken from a high-pressure accumulator and there under a pressure of up to 3000bar standing fuel and injected into an associated combustion chamber of an internal combustion engine.
  • the inventive method for increasing the life of the injector is particularly advantageous applicable.
  • the shaping according to the invention of the intersection achieves a radial expansion of the longitudinal bore forming a valve space, which results in the local stress values in the intersecting area being reduced or displaced and distributed over a larger "area", as a result of which the stress state in a desired way is changed.
  • the reduction of the voltage values results from the fact that the pockets generate an increased pressure area in the radial direction.
  • the resulting force counteracts the change in curvature of the intersection caused by the circumferential stresses of the axial longitudinal bore. This ensures that the maximum stress is no longer in the range of the intersection lines, but migrates into the smooth area of the inlet bore.
  • FIG. 1 shows in a schematic side view of an injector 1, which is part of an injection system designed as a fuel injection system.
  • the fuel injection system is designed in particular as a common rail injection system for injecting a fuel, in particular diesel fuel, into assigned combustion chambers of an internal combustion engine.
  • a fuel pressure of up to 3000 bar.
  • the injector 1 has a base body 2, which is screwed by means of a clamping nut 3 with a nozzle body 4 receiving a nozzle needle.
  • the nozzle body 4 protrudes at least with a nozzle body support 5 in a combustion chamber of the internal combustion engine and the nozzle body tip has spray openings 6, controlled by the controlled liquid medium in the form of fuel in an associated combustion chamber can be injected.
  • the fuel is introduced via a high-pressure port 7 into a high-pressure bore 8 embedded in the main body 2.
  • the high-pressure bore 8 communicates with a second channel 9, which opens into a first channel 10 in a body 11 of the injector 1 made of a metallic material.
  • the body 11 is a body part of the injector 1 and may be the main body 2 or a body part disposed between the main body 2 and the nozzle body 4. In this context, it is also possible that the clamping nut 3 is screwed above the body 11 with the base body 2.
  • the first channel is in the illustrated embodiment, a substantially cylindrically shaped valve chamber, with the associated valve, the opening and closing of the injector 1 is set, and thus the amount of fuel discharged through the spray openings 6 is determined.
  • the junction 12 of the second channel 9 in the first channel 10 forms an intersection, wherein in the region on both sides of the junction 12 pockets 13a, 13b are arranged.
  • the second channel 9 opens in the illustrated embodiment tangentially at an angle W3 (for example, about 10 °) in the first channel 10 a.
  • the first pocket 13a is at an angle W1 (for example, about 20 °) to a Coordinate system arranged while the bag 13b at an angle W2 (for example, 110 °) is arranged to the first pocket 13a.
  • the pocket 13a is aligned with the junction 12 so that the channel wall 14a projects up to the first channel 1, while the channel wall 14b of the second channel 9 on the opposite side at an obtuse angle even before the connection to the first channel 1 in the bag 13b passes.
  • FIG. 3 shown longitudinal section through the body 11 shows the first channel 10 and the tangential opening into the first channel 10 second channel 9.
  • pockets 13a, 13b in the body 11th are incorporated, which are incorporated by means of a round drill parallel or at least approximately parallel to the first channel 10 in the body 11.
  • the pockets 13a, 13b are incorporated in the embodiment to below the junction 12 in the body 11, but can also be performed only up to the area of the actual junction 12.
  • the pockets 13a, 13b by means of a tool having an angle drive only in the region of the height of the junction 12 in the body 11 as spherical segment-shaped pockets 13a, 13b, which is shown by dashed lines in the region of the pocket 13bb.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)
EP15170032.5A 2014-06-25 2015-06-01 Procédé de réduction de la tension sur une découpe de deux canaux débouchant l'un dans l'autre Active EP2960486B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102014212194.9A DE102014212194A1 (de) 2014-06-25 2014-06-25 Verfahren zur Reduzierung der Spannung an einer Verschneidung zweier ineinander einmündenden Kanäle

Publications (2)

Publication Number Publication Date
EP2960486A1 true EP2960486A1 (fr) 2015-12-30
EP2960486B1 EP2960486B1 (fr) 2019-05-08

Family

ID=53396228

Family Applications (1)

Application Number Title Priority Date Filing Date
EP15170032.5A Active EP2960486B1 (fr) 2014-06-25 2015-06-01 Procédé de réduction de la tension sur une découpe de deux canaux débouchant l'un dans l'autre

Country Status (2)

Country Link
EP (1) EP2960486B1 (fr)
DE (1) DE102014212194A1 (fr)

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0717227A2 (fr) 1994-12-16 1996-06-19 Perkins Limited Procédé pour réduire les contraintes à la jonction d'un système de canaux d'écoulement de fluide sous haute pression et jonction ainsi réalisée
EP1304476A2 (fr) * 2001-10-20 2003-04-23 Robert Bosch Gmbh Injecteur résistant aux pressions élevées
WO2003036075A1 (fr) * 2001-10-20 2003-05-01 Robert Bosch Gmbh Accumulateur haute pression, en particulier accumulateur haute pression pour carburant
DE102007018471A1 (de) * 2007-04-19 2008-10-23 Robert Bosch Gmbh Verschneidungsbereich zwischen einer Hochdruckkammer und einem Hochdruckkanal
DE102009004680A1 (de) * 2009-01-12 2010-07-15 L'orange Gmbh Einspritzdüse mit einem Düsenkörper
EP2299102A1 (fr) * 2009-09-07 2011-03-23 OMT Officine Meccaniche Torino S.p.A. Accumulateur de combustible haute pression pour systèmes d'injection à rampe commune
DE102010022909A1 (de) * 2010-06-07 2011-12-08 Continental Automotive Gmbh Kraftstoffinjektor mit Kanalanordnung
DE102011101770A1 (de) * 2011-05-17 2012-08-02 L'orange Gmbh Anordnung mit einem Festkörper sowie einer darin gebildeten Verschneidung zweier Hochdruck-Fluidkanäle
DE102011079075A1 (de) * 2011-07-13 2013-01-17 Hirschvogel Umformtechnik Gmbh Innendruckbelastetes Bauteil

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0717227A2 (fr) 1994-12-16 1996-06-19 Perkins Limited Procédé pour réduire les contraintes à la jonction d'un système de canaux d'écoulement de fluide sous haute pression et jonction ainsi réalisée
EP1304476A2 (fr) * 2001-10-20 2003-04-23 Robert Bosch Gmbh Injecteur résistant aux pressions élevées
WO2003036075A1 (fr) * 2001-10-20 2003-05-01 Robert Bosch Gmbh Accumulateur haute pression, en particulier accumulateur haute pression pour carburant
DE102007018471A1 (de) * 2007-04-19 2008-10-23 Robert Bosch Gmbh Verschneidungsbereich zwischen einer Hochdruckkammer und einem Hochdruckkanal
DE102009004680A1 (de) * 2009-01-12 2010-07-15 L'orange Gmbh Einspritzdüse mit einem Düsenkörper
EP2299102A1 (fr) * 2009-09-07 2011-03-23 OMT Officine Meccaniche Torino S.p.A. Accumulateur de combustible haute pression pour systèmes d'injection à rampe commune
DE102010022909A1 (de) * 2010-06-07 2011-12-08 Continental Automotive Gmbh Kraftstoffinjektor mit Kanalanordnung
DE102011101770A1 (de) * 2011-05-17 2012-08-02 L'orange Gmbh Anordnung mit einem Festkörper sowie einer darin gebildeten Verschneidung zweier Hochdruck-Fluidkanäle
DE102011079075A1 (de) * 2011-07-13 2013-01-17 Hirschvogel Umformtechnik Gmbh Innendruckbelastetes Bauteil

Also Published As

Publication number Publication date
EP2960486B1 (fr) 2019-05-08
DE102014212194A1 (de) 2015-12-31

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