EP2705242A1 - Fuel distributor - Google Patents

Fuel distributor

Info

Publication number
EP2705242A1
EP2705242A1 EP12709851.5A EP12709851A EP2705242A1 EP 2705242 A1 EP2705242 A1 EP 2705242A1 EP 12709851 A EP12709851 A EP 12709851A EP 2705242 A1 EP2705242 A1 EP 2705242A1
Authority
EP
European Patent Office
Prior art keywords
passage opening
fuel
fuel distributor
longitudinal axis
distributor according
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
EP12709851.5A
Other languages
German (de)
French (fr)
Other versions
EP2705242B1 (en
Inventor
Henning Kreschel
Egon Stratmann
Markus Feigl
Holger UHRIG
Nikolaus Hautmann
Dietmar Uhlenbrock
Martin GOEHNER
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 EP2705242A1 publication Critical patent/EP2705242A1/en
Application granted granted Critical
Publication of EP2705242B1 publication Critical patent/EP2705242B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • F02M69/00—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel
    • F02M69/46—Details, component parts or accessories not provided for in, or of interest apart from, the apparatus covered by groups F02M69/02 - F02M69/44
    • F02M69/462—Arrangement of fuel conduits, e.g. with valves for maintaining pressure in the pipes after the engine being shut-down
    • F02M69/465—Arrangement of fuel conduits, e.g. with valves for maintaining pressure in the pipes after the engine being shut-down of fuel 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
    • 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
    • F02M2200/8046—Fuel injection apparatus manufacture, repair or assembly the manufacture involving injection moulding, e.g. of plastic or metal
    • 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
    • F02M2200/9015—Elastomeric or plastic materials

Definitions

  • the invention relates to a fuel distributor, in particular for
  • the invention relates to the field of as
  • Fuel rail is used, which is designed for high pressure applications made of steel or aluminum. As a result, a compressive strength for pressures of, for example, 20 MPa (200 bar) can be achieved. However, this massive design of the suitable for high pressure applications Rails is associated with high production costs.
  • Fuel rail manifolds may also be used for low pressure applications at 0.3 MPa (3 bar) to 0.5 MPa (5 bar) for such applications.
  • thin-walled steel tubes can serve to produce the fuel distributor.
  • the scope of such fuel rail for low pressure applications is limited to the low pressure range mentioned. Disclosure of the invention
  • the fuel distributor according to the invention with the features of claim 1 has the advantage that a compressive strength of the fuel distributor is improved. Specifically, a suitable for a medium pressure fuel distributor with comparatively low
  • the tubular base body is formed as an injection molded part, wherein an injection direction is parallel to the longitudinal axis of the tubular base body. Due to the eccentric arrangement of the through hole, the stress level under load can be reduced overall. By the injection direction along the longitudinal axis results in the injection direction behind the passage opening a Bindenaht. Due to the eccentric arrangement of this Bindenaht is positioned obliquely. Since the strength is thereby improved, the tubular base body with respect to a desired load capacity, in particular a pressure level, made of plastic with a reduced
  • Wall thickness can be produced. As a result, the cycle time, which depends essentially on the cooling time during injection molding, can be reduced.
  • a non-concave embodiment here comprises a somewhat rectilinear configuration and a convex configuration.
  • the arrangement of the weld line at the non-concave portion of the edge of the passage opening, the weld line is in the range of lower mechanical stresses.
  • the weld line is arranged away from occurring stress peaks in the region of concave curves of the edge of the passage opening. Since the local material strength is reduced in the region of the weld line, but at the same time the stress distribution in the tubular body is influenced so that the stresses are reduced to the weld line, the strength of the tubular
  • Through hole is designed as a slot-shaped passage opening and that the slot-shaped passage opening is aligned in a circumferential direction with respect to the longitudinal axis.
  • the slot-shaped passage opening allows the arrangement of the weld line in the region of the straight edge section, so that the weld line is removed from the stress peaks in the region of the curves of the slot-shaped passage opening.
  • an edge of the passage opening in the region of the weld line is convex toward the weld line. As a result, the stresses occurring in the region of the weld line in the plastic can also be reduced. It is also advantageous that an opening width of the passage opening in the
  • Circumferential direction with respect to the longitudinal axis is greater than an opening width of
  • an oval configuration can be realized in which, in the region of the weakest curvature of the oval passage opening, the weld line adjoins the passage opening.
  • Passage opening is at least partially. Since the non-concave surface is provided only in the region of the passage opening, the configuration of the non-concave surface can be realized by only a slight thickening of the wall of the tubular base body. This demolding technology can thus be easily realized, with the cycle time, in particular cooling time, only slightly extended during injection molding. Although the tension can also be reduced and laid outside the weld line due to a large area, the wall thickness increases more strongly, which adversely affects the cycle time and thus increases the production costs.
  • Fuel chamber is located on both sides within the opening width of the passage opening in the circumferential direction.
  • the strength can be increased locally, especially in the weakened by the Bindenaht local area of the tubular body formed of plastic.
  • the maximum voltage itself as well as the volume in which the high voltage is applied, reduced.
  • the component load capacity increases.
  • the non-concave surface is designed on the inner wall as at least approximately flat surface. Due to the planar configuration of the non-concave surface, a certain increase in the material thickness or wall thickness can be achieved, which, however, is insignificant in terms of cooling and thus extends the cycle time, in particular the cooling time, during injection molding only insignificantly.
  • the component load capacity can be improved without the
  • Fig. 1 shows a fuel distributor in a schematic sectional view of
  • Fig. 2 shows a fuel distributor in a schematic sectional view of
  • Fig. 1 shows a fuel distributor 1 in a partial, schematic
  • the fuel distributor 1 has a tubular base body 3. Specifically, the tubular base body 3 may be configured substantially hollow cylindrical. However, other embodiments are possible. For example, those with an oval cross-section. Other elements of the fuel distributor 1 are not shown for simplicity of illustration. Such elements may include, but are not limited to, cups used for
  • the fuel distributor 1 can be designed in the form of a fuel distributor strip 1.
  • the fuel distributor 1 is particularly suitable for fuel injection systems of mixture-compressing, spark-ignited internal combustion engines.
  • the fuel distributor 1 is suitable for a medium-pressure system. The medium pressure for such a
  • Medium pressure system can be in the range of 3 MPa to 10 MPa or 30 bar to 100 bar.
  • the mean pressure may be in the range of 5 MPa to 7 MPa or 50 bar to 70 bar.
  • the fuel distributor 1 according to the invention is also suitable for other applications.
  • the tubular base body 3 has an inner wall 4, which is designed substantially cylinder jacket-shaped.
  • the inner wall 4 of the tubular body 3 limits a fuel space 5 of the fuel distributor. 1
  • the fuel chamber 5 is designed here as an elongated fuel chamber 5. In operation, fuel is carried over a suitable connection of the fuel distributor 1 preferably under a medium pressure fuel in the space 5. The stress of the tubular
  • Body 3 is greater than a stress in low pressure applications. However, the stress is also lower than in high pressure applications requiring compression strength of, for example, 20 MPa (200 bar) in spark-ignited spark-ignited internal combustion engines.
  • the tubular base body 3 is made of a plastic, which is preferably designed as an injection molded part.
  • An injection direction 6 (FIG. 2) is selected here at least approximately parallel to the longitudinal axis 2 of the tubular main body 3.
  • Through holes 7, 8 illustrate this case possible embodiments for a plurality of through holes, which are configured, for example along the axis 2 one behind the other on the tubular base body 3, to allow a connection with a corresponding number of cups of the fuel distributor 1.
  • through-holes can also serve for other purposes.
  • the passage openings 7, 8 have centrally through the passage opening 7, 8 extending axes 20, 21. However, the axes 20, 21 do not point to the longitudinal axis 2, since the passage openings 7, 8 eccentric to the center through the elongated
  • the axes 20, 21 are in each case oriented eccentrically to the longitudinal axis 2.
  • tubular body 3 in the region of the passage openings 7, 8 and thus improved overall.
  • the inner wall 4 is relative to a circumferential direction 22 of the longitudinal axis of the second
  • the circumferential direction 22 here refers to the longitudinal axis 2.
  • the inner wall 4 in the region of the passage openings 20, 21 at least partially not concave.
  • Such non-concave surfaces 23, 24 are provided at the passage openings 7, 8. By the non-concave surfaces 23, 24, the load capacity in the region of the through holes 7, 8 is further improved.
  • the non-concave surface 23 is here as flat surface 23 configured. The flat surface 23 extends along a
  • a wall thickness 28 in the region of the passage opening 7 is somewhat increased, this increase in terms of the cycle time, in particular cooling time, during injection molding but only slightly.
  • the strength in the region of the through opening 7 thus improves.
  • the improved local strength in this case relates in particular to a weld line, which is also described with reference to FIG. 2.
  • the non-concave surface 24 at the passage opening 8 is configured as a convex surface 24.
  • the convex surface 24 extends in the longitudinal direction 25 on both sides via the passage opening 8.
  • an extent 29 of the convex surface 24 is smaller than an opening width 30 of the
  • the occurring in the region of the passage opening 8 enlargement of the wall thickness 28 is optimized in terms of volume. Specifically, in relation to the occurring increase in volume in the region of the passage opening 8, the wall thickness 28 at a weld line can be set comparatively large, without this adversely affecting the cycle time, in particular cooling time, during injection molding.
  • Fig. 2 shows a fuel distributor 1 in a partial, schematic
  • passage openings 9 to 15 corresponding to possible embodiments of the invention are shown.
  • the passage openings 9 to 15 corresponding to the passage openings 7, 8 are preferably also or additionally eccentric to the center through the elongated
  • Fuel chamber 5 extending longitudinal axis 2 on the inner wall 4 of the tubular body 3 in the fuel space 5 out.
  • the passage opening 9 is configured at least approximately circular.
  • an opening width 31 of the passage opening 9 in the circumferential direction 22 with respect to the longitudinal axis 2 is the same size as an opening width 32 of the passage opening 9 in the longitudinal direction 25 along the longitudinal axis 2.
  • Through openings 10 to 15 each have a weld line 34 to 39th At the weld line 33, the stability of the tubular base body 3 is impaired.
  • the passage opening 10 is designed in accordance with the passage opening 9 with a circular cross-section. However, the passage opening 10 is smaller than the
  • Passage opening 9 carried out so that the stability in the region of the weld line 34 is less affected than in the region of the weld line 33 at the through hole 9.
  • the passage opening 10 is in this case carried out with respect to the allowable pressure as small as possible.
  • the passage opening 1 1 is configured at least approximately oval. As a result, an opening width 40 of the passage opening 1 1 in the circumferential direction 22 with respect to the longitudinal axis 2 is greater than an opening width 41 of the passage opening 1 1 in the
  • the passage opening 12 is designed as a slot-shaped passage opening 12.
  • the slot-shaped passage opening 12 is aligned in the circumferential direction 22 with respect to the longitudinal axis 2.
  • an edge 43 of the passage opening 12 has a straight section 44 in the region of the weld line 36.
  • the resulting in the region of the weld line 36 voltages compared to the situation at the
  • Bindenaht 37 acting stress in the tubular body 3 compared to the situation described with reference to the passage opening 12 can be further reduced.
  • the described with reference to the through holes 12 and 13 embodiments of the edge 43, 46 represent examples of through holes 12, 13, in the area of their Bindenaht 36, 37 are formed to the weld line 36, 37 out not concave.
  • the straight portion 44 and the convex portion 45 are examples of non-concave
  • Passage opening 14 designed maximally eccentric, with a bulge 47 is provided on the tubular body 3. As a result, the passage opening 14 can even be arranged eccentrically outside of the cylinder jacket-shaped remaining part of the inner wall 4.
  • an extension 50 (FIG. 2) of the non-concave surface in the longitudinal direction 25 of the oblong fuel space 5 is preferably larger than the one
  • the extension 50 projects beyond the opening width 32 at least on the side of the weld line 33 and preferably on both sides.
  • Through holes 7 to 15 can be combined with each other in a meaningful way.
  • the smallest possible cross section is always predetermined, as described with reference to the through opening 10.
  • an eccentric configuration is always predetermined, as described with reference to the passage openings 7, 8, 14, 15.
  • a non-concave surface 23, 24 is provided at the passage opening, as described with reference to the passage openings 7, 8, 9.
  • an opening width 41 in the longitudinal direction 25 is preferably smaller than an opening width 40 in the circumferential direction 22, as described with reference to the through holes 11 to 13.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)

Abstract

A fuel distributor (1) which serves in particular for fuel injection systems of mixture-compressing, applied-ignition internal combustion engines comprises a tubular main body (3). Here, an inner wall (4) of the tubular main body (3) delimits an elongate fuel chamber (5). The tubular main body (3) is formed from a plastic. On the tubular main body (3) there is provided at least one passage opening (7 to 15) which, at the inner wall (4) of the tubular main body (3), issues into the fuel chamber (5) eccentrically with respect to a longitudinal axis (2) running centrally through the elongate fuel chamber (5). In this way, the strength of the fuel distributor (1) can be improved.

Description

Beschreibung  description
Titel title
Brenn Stoffverteiler Stand der Technik  Brenn substance distributor state of the art
Die Erfindung betrifft einen Brennstoffverteiler, der insbesondere für The invention relates to a fuel distributor, in particular for
Brennstoffeinspritzanlagen von gemischverdichtenden, fremdgezündeten Fuel injection systems of mixture-compressing, spark-ignited
Brennkraftmaschinen dient. Speziell betrifft die Erfindung das Gebiet der als Internal combustion engine is used. Specifically, the invention relates to the field of as
Mitteldrucksysteme ausgestalteten Brennstoffeinspritzanlagen. Medium pressure systems designed fuel injection systems.
Bei Brennstoffeinspritzanlagen von Kraftfahrzeugen ist es denkbar, dass eine In fuel injection systems of motor vehicles, it is conceivable that a
Brennstoffverteilerleiste zum Einsatz kommt, die für Hochdruckanwendungen aus Stahl oder Aluminium ausgebildet ist. Hierdurch kann eine Druckfestigkeit für Drücke von beispielsweise 20 MPa (200 bar) erreicht werden. Diese massive Ausgestaltung des für Hochdruckanwendungen geeigneten Rails ist allerdings mit hohen Herstellungskosten verbunden. Fuel rail is used, which is designed for high pressure applications made of steel or aluminum. As a result, a compressive strength for pressures of, for example, 20 MPa (200 bar) can be achieved. However, this massive design of the suitable for high pressure applications Rails is associated with high production costs.
Ferner können Brennstoffverteilerleisten für Niederdruckanwendungen bei 0,3 MPa (3 bar) bis 0,5 MPa (5 bar) für diesbezüglich Anwendungen zum Einsatz kommen. Hierbei können beispielsweise dünnwandige Stahlrohre zur Herstellung der Brennstoffverteilerleiste dienen. Der Anwendungsbereich solcher Brennstoffverteilerleisten für Niederdruckanwendungen ist allerdings auf den genannten Niederdruckbereich begrenzt. Offenbarung der Erfindung Fuel rail manifolds may also be used for low pressure applications at 0.3 MPa (3 bar) to 0.5 MPa (5 bar) for such applications. Here, for example, thin-walled steel tubes can serve to produce the fuel distributor. However, the scope of such fuel rail for low pressure applications is limited to the low pressure range mentioned. Disclosure of the invention
Der erfindungsgemäße Brennstoffverteiler mit den Merkmalen des Anspruchs 1 hat den Vorteil, dass eine Druckfestigkeit des Brennstoffverteilers verbessert ist. Speziell kann ein für einen Mitteldruck geeigneter Brennstoffverteiler mit vergleichsweise niedrigen The fuel distributor according to the invention with the features of claim 1 has the advantage that a compressive strength of the fuel distributor is improved. Specifically, a suitable for a medium pressure fuel distributor with comparatively low
Herstellungskosten geschaffen werden. Production costs are created.
Durch die in den Unteransprüchen aufgeführten Maßnahmen sind vorteilhafte The measures listed in the dependent claims are advantageous
Weiterbildungen des im Anspruch 1 angegebenen Brennstoffverteilers möglich. In vorteilhafter Weise ist der rohrförmige Grundkörper als Spritzgussteil ausgebildet, wobei eine Spritzrichtung parallel zu der Längsachse des rohrförmigen Grundkörpers ist. Durch die exzentrische Anordnung der Durchgangsbohrung kann das Spannungsniveau bei Belastung insgesamt reduziert werden. Durch die Spritzrichtung entlang der Längsachse ergibt sich in Spritzrichtung gesehen hinter der Durchgangsöffnung eine Bindenaht. Durch die exzentrische Anordnung ist diese Bindenaht schräg aufgestellt. Da die Festigkeit hierdurch verbessert wird, kann der rohrförmige Grundkörper in Bezug auf eine gewünschte Belastbarkeit, insbesondere ein Druckniveau, aus Kunststoff mit einer reduzierten Further developments of the fuel distributor specified in claim 1 possible. Advantageously, the tubular base body is formed as an injection molded part, wherein an injection direction is parallel to the longitudinal axis of the tubular base body. Due to the eccentric arrangement of the through hole, the stress level under load can be reduced overall. By the injection direction along the longitudinal axis results in the injection direction behind the passage opening a Bindenaht. Due to the eccentric arrangement of this Bindenaht is positioned obliquely. Since the strength is thereby improved, the tubular base body with respect to a desired load capacity, in particular a pressure level, made of plastic with a reduced
Wanddicke hergestellt werden. Hierdurch kann die Zykluszeit, die wesentlich von der Kühlzeit beim Spritzgießen abhängt, reduziert werden. Wall thickness can be produced. As a result, the cycle time, which depends essentially on the cooling time during injection molding, can be reduced.
Vorteilhaft ist es, dass ein Rand der Durchgangsöffnung im Bereich der Bindenaht zu der Bindenaht hin nicht konkav ausgestaltet ist. Eine nicht konkave Ausgestaltung umfasst hierbei eine gewissermaßen geradlinige Ausgestaltung und eine konvexe Ausgestaltung. Durch die Anordnung der Bindenaht an dem nicht konkaven Abschnitt des Randes der Durchgangsöffnung befindet sich die Bindenaht im Bereich geringerer mechanischer Spannungen. Speziell ist die Bindenaht hierbei von auftretenden Spannungsspitzen im Bereich von konkaven Rundungen des Randes der Durchgangsöffnung entfernt angeordnet. Da die lokale Materialfestigkeit im Bereich der Bindenaht reduziert ist, zugleich aber die Spannungsverteilung im rohrförmigen Grundkörper so beeinflusst wird, dass die Spannungen an der Bindenaht reduziert sind, kann die Festigkeit des rohrförmigen It is advantageous that an edge of the passage opening in the region of the weld line to the weld line is not configured concave. A non-concave embodiment here comprises a somewhat rectilinear configuration and a convex configuration. The arrangement of the weld line at the non-concave portion of the edge of the passage opening, the weld line is in the range of lower mechanical stresses. Specifically, the weld line is arranged away from occurring stress peaks in the region of concave curves of the edge of the passage opening. Since the local material strength is reduced in the region of the weld line, but at the same time the stress distribution in the tubular body is influenced so that the stresses are reduced to the weld line, the strength of the tubular
Grundkörpers insgesamt verbessert werden. Vorteilhaft ist es hierbei ferner, dass ein Rand der Durchgangsöffnung im Bereich der Bindenaht einen geraden Abschnitt aufweist. Speziell ist es vorteilhaft, dass die Total body to be improved. It is also advantageous here for an edge of the passage opening to have a straight section in the region of the weld line. Specifically, it is advantageous that the
Durchgangsöffnung als langlochförmige Durchgangsöffnung ausgestaltet ist und dass die langlochförmige Durchgangsöffnung in einer Umfangsrichtung bezüglich der Längsachse ausgerichtet ist. Die langlochförmige Durchgangsöffnung ermöglicht in Bezug auf eine kreisförmige Durchgangsöffnung mit gleichem Strömungsquerschnitt die Anordnung der Bindenaht im Bereich des geraden Randabschnitts, so dass die Bindenaht von den Spannungsspitzen im Bereich der Rundungen der langlochförmigen Durchgangsöffnung entfernt ist. Vorteilhaft ist es allerdings auch, dass ein Rand der Durchgangsöffnung im Bereich der Bindenaht zu der Bindenaht hin konvex ausgestaltet ist. Hierdurch können die im Bereich der Bindenaht auftretenden Spannungen im Kunststoff ebenfalls verringert werden. Vorteilhaft ist es ferner, dass eine Öffnungsweite der Durchgangsöffnung in der Through hole is designed as a slot-shaped passage opening and that the slot-shaped passage opening is aligned in a circumferential direction with respect to the longitudinal axis. With respect to a circular passage opening with the same flow cross-section, the slot-shaped passage opening allows the arrangement of the weld line in the region of the straight edge section, so that the weld line is removed from the stress peaks in the region of the curves of the slot-shaped passage opening. However, it is also advantageous that an edge of the passage opening in the region of the weld line is convex toward the weld line. As a result, the stresses occurring in the region of the weld line in the plastic can also be reduced. It is also advantageous that an opening width of the passage opening in the
Umfangsrichtung bezüglich der Längsachse größer ist als eine Öffnungsweite der Circumferential direction with respect to the longitudinal axis is greater than an opening width of
Durchgangsöffnung in einer Längsrichtung entlang der Längsachse. Insbesondere kann eine ovale Ausgestaltung realisiert werden, bei der im Bereich der schwächsten Krümmung der ovalen Durchgangsöffnung die Bindenaht an die Durchgangsöffnung angrenzt. Through opening in a longitudinal direction along the longitudinal axis. In particular, an oval configuration can be realized in which, in the region of the weakest curvature of the oval passage opening, the weld line adjoins the passage opening.
Hierdurch ergibt sich ebenfalls eine reduzierte lokale mechanische Spannung an der Bindenaht, so dass die Festigkeit insgesamt verbessert ist. This also results in a reduced local mechanical stress on the weld line, so that the strength is improved overall.
Außerdem ist es vorteilhaft, dass an der Innenwand des rohrförmigen Grundkörpers im Bereich der Durchgangsöffnung eine nicht konkave Fläche ausgestaltet ist, in der dieMoreover, it is advantageous that on the inner wall of the tubular base body in the region of the passage opening a non-concave surface is configured, in which the
Durchgangsöffnung zumindest teilweise liegt. Da die nicht konkave Fläche nur im Bereich der Durchgangsöffnung vorgesehen ist, kann die Ausgestaltung der nicht konkaven Fläche durch eine nur geringe Aufdickung der Wand des rohrförmigen Grundkörpers realisiert werden. Dies kann entformungstechnisch somit einfach realisiert werden, wobei sich die Zykluszeit, insbesondere Kühlzeit, beim Spritzgießen nur geringfügig verlängert. Durch eine große Fläche kann die Spannung zwar ebenfalls reduziert und außerhalb der Bindenaht verlegt werden, die Wanddicke steigt hierbei aber stärker an, was sich ungünstig auf die Zykluszeit auswirkt und somit die Herstellungskosten erhöht. Vorteilhaft ist es daher auch, dass eine Ausdehnung der nicht konkaven Fläche in einer Längsrichtung entlang der Längsachse des länglichen Brennstoffraums die Öffnungsweite der Durchgangsöffnung in der Längsrichtung zumindest einseitig überragt und dass eine Ausdehnung der nicht konkaven Fläche in der Umfangsrichtung bezüglich der Längsachse des länglichen Passage opening is at least partially. Since the non-concave surface is provided only in the region of the passage opening, the configuration of the non-concave surface can be realized by only a slight thickening of the wall of the tubular base body. This demolding technology can thus be easily realized, with the cycle time, in particular cooling time, only slightly extended during injection molding. Although the tension can also be reduced and laid outside the weld line due to a large area, the wall thickness increases more strongly, which adversely affects the cycle time and thus increases the production costs. It is therefore also advantageous that an expansion of the non-concave surface in a longitudinal direction along the longitudinal axis of the elongate fuel chamber projects beyond the opening width of the passage opening in the longitudinal direction at least on one side and that an extension of the non-concave surface in the circumferential direction with respect to the longitudinal axis of the elongated
Brennstoffraums beidseitig innerhalb der Öffnungsweite der Durchgangsöffnung in der Umfangsrichtung liegt. Hierdurch kann gerade in dem durch die Bindenaht geschwächten lokalen Bereich des aus Kunststoff gebildeten rohrförmigen Grundkörpers die Festigkeit lokal erhöht werden. Außerdem wird durch diese Maßnahme das Spannungsmaximum selbst sowie auch das Volumen, in dem die hohe Spannung anliegt, reduziert. Somit steigt die Bauteilbelastbarkeit. Vorteilhaft ist es besonders, dass die nicht konkave Fläche an der Innenwand als zumindest näherungsweise ebene Fläche ausgestaltet ist. Durch die ebene Ausgestaltung der nicht konkaven Fläche kann eine gewisse Vergrößerung der Materialstärke beziehungsweise Wanddicke erreicht werden, die allerdings in Bezug auf das Auskühlen unwesentlich ist und somit die Zykluszeit, insbesondere die Kühlzeit, beim Spritzgießen nur unwesentlich verlängert. Somit kann die Bauteilbelastbarkeit verbessert werden, ohne die Fuel chamber is located on both sides within the opening width of the passage opening in the circumferential direction. As a result, the strength can be increased locally, especially in the weakened by the Bindenaht local area of the tubular body formed of plastic. In addition, by this measure, the maximum voltage itself as well as the volume in which the high voltage is applied, reduced. Thus, the component load capacity increases. It is particularly advantageous that the non-concave surface is designed on the inner wall as at least approximately flat surface. Due to the planar configuration of the non-concave surface, a certain increase in the material thickness or wall thickness can be achieved, which, however, is insignificant in terms of cooling and thus extends the cycle time, in particular the cooling time, during injection molding only insignificantly. Thus, the component load capacity can be improved without the
Herstellungskosten zu erhöhen. Dies ist insbesondere bei einer kleinen ebenen Fläche der Fall, die kleiner als die Austrittsfläche der Durchgangsöffnung ist. Kurze Beschreibung der Zeichnungen Increase production costs. This is particularly the case with a small flat surface, which is smaller than the exit surface of the through hole. Brief description of the drawings
Bevorzugte Ausführungsbeispiele der Erfindung sind in der nachfolgenden Beschreibung unter Bezugnahme auf die beigefügten Zeichnungen, in denen sich entsprechende Elemente mit übereinstimmenden Bezugzeichen versehen sind, näher erläutert. Es zeigt: Preferred embodiments of the invention are explained in more detail in the following description with reference to the accompanying drawings, in which corresponding elements are provided with corresponding reference numerals. It shows:
Fig. 1 einen Brennstoffverteiler in einer schematischen Schnittdarstellung zur Fig. 1 shows a fuel distributor in a schematic sectional view of
Veranschaulichung möglicher Ausgestaltungen der Erfindung, wobei die Schnittebene senkrecht zu einer Längsachse des Brennstoffverteilers liegt, und Illustrating possible embodiments of the invention, wherein the sectional plane is perpendicular to a longitudinal axis of the fuel distributor, and
Fig. 2 einen Brennstoffverteiler in einer schematischen Schnittdarstellung zur Fig. 2 shows a fuel distributor in a schematic sectional view of
Veranschaulichung möglicher Ausgestaltungen der Erfindung, wobei die Längsachse des Brennstoffverteilers in der Schnittebene liegt. Ausführungsformen der Erfindung Illustrating possible embodiments of the invention, wherein the longitudinal axis of the fuel distributor is in the sectional plane. Embodiments of the invention
Fig. 1 zeigt einen Brennstoffverteiler 1 in einer auszugsweisen, schematischen Fig. 1 shows a fuel distributor 1 in a partial, schematic
Schnittdarstellung zur Erläuterung möglicher Ausgestaltungen der Erfindung, wobei eine Schnittebene senkrecht zu einer Längsachse 2 (Fig. 2) orientiert ist. Der Brennstoffverteiler 1 weist einen rohrförmigen Grundkörper 3 auf. Speziell kann der rohrförmige Grundkörper 3 im Wesentlichen hohlzylinderförmig ausgestaltet sein. Es sind allerdings auch andere Ausgestaltungen möglich. Beispielsweise solche mit einem ovalen Querschnitt. Weitere Elemente des Brennstoffverteilers 1 sind zur Vereinfachung der Darstellung nicht gezeigt. Bei solchen Elementen kann es sich unter anderem um Tassen handeln, die zum Sectional view for explaining possible embodiments of the invention, wherein a sectional plane perpendicular to a longitudinal axis 2 (Fig. 2) is oriented. The fuel distributor 1 has a tubular base body 3. Specifically, the tubular base body 3 may be configured substantially hollow cylindrical. However, other embodiments are possible. For example, those with an oval cross-section. Other elements of the fuel distributor 1 are not shown for simplicity of illustration. Such elements may include, but are not limited to, cups used for
Verbinden des Brennstoffverteilers 1 mit Brennstoffeinspritzventilen dienen. Connecting the fuel distributor 1 serve with fuel injection valves.
Der Brennstoffverteiler 1 kann in Form einer Brennstoffverteilerleiste 1 ausgestaltet sein. Der Brennstoffverteiler 1 eignet sich besonders für Brennstoffeinspritzanlagen von gemischverdichtenden, fremdgezündeten Brennkraftmaschinen. Speziell eignet sich der Brennstoffverteiler 1 hierbei für ein Mitteldrucksystem. Der Mitteldruck für solch ein The fuel distributor 1 can be designed in the form of a fuel distributor strip 1. The fuel distributor 1 is particularly suitable for fuel injection systems of mixture-compressing, spark-ignited internal combustion engines. In particular, the fuel distributor 1 is suitable for a medium-pressure system. The medium pressure for such a
Mitteldrucksystem kann hierbei im Bereich von 3 MPa bis 10 MPa beziehungsweise 30 bar bis 100 bar liegen. Insbesondere kann der Mitteldruck im Bereich von 5 MPa bis 7 MPa beziehungsweise 50 bar bis 70 bar liegen. Der erfindungsgemäße Brennstoffverteiler 1 eignet sich allerdings auch für andere Anwendungsfälle.  Medium pressure system can be in the range of 3 MPa to 10 MPa or 30 bar to 100 bar. In particular, the mean pressure may be in the range of 5 MPa to 7 MPa or 50 bar to 70 bar. However, the fuel distributor 1 according to the invention is also suitable for other applications.
Der rohrförmige Grundkörper 3 weist eine Innenwand 4 auf, die im Wesentlichen zylindermantelförmig ausgestaltet ist. Die Innenwand 4 des rohrförmigen Grundkörpers 3 begrenzt einen Brennstoff räum 5 des Brennstoffverteilers 1 . Der Brennstoffraum 5 ist hierbei als länglicher Brennstoffraum 5 ausgestaltet. Im Betrieb wird über einen geeigneten Anschluss des Brennstoffverteilers 1 vorzugsweise unter einem Mitteldruck stehender Brennstoff in den Brennstoff räum 5 geführt. Die Beanspruchung des rohrförmigen The tubular base body 3 has an inner wall 4, which is designed substantially cylinder jacket-shaped. The inner wall 4 of the tubular body 3 limits a fuel space 5 of the fuel distributor. 1 The fuel chamber 5 is designed here as an elongated fuel chamber 5. In operation, fuel is carried over a suitable connection of the fuel distributor 1 preferably under a medium pressure fuel in the space 5. The stress of the tubular
Grundkörpers 3 ist hierbei größer als eine Beanspruchung bei Niederdruckanwendungen. Allerdings ist die Beanspruchung auch niedriger als bei Hochdruckanwendungen, die bei gemischverdichtenden, fremdgezündeten Brennkraftmaschinen eine Druckfestigkeit von beispielsweise 20 MPa (200 bar) erfordern. Body 3 is greater than a stress in low pressure applications. However, the stress is also lower than in high pressure applications requiring compression strength of, for example, 20 MPa (200 bar) in spark-ignited spark-ignited internal combustion engines.
Um die Belastbarkeit des Brennstoffverteilers 1 in Bezug auf Niederdruckanwendungen zu verbessern und zugleich in Bezug auf Hochdruckanwendungen die Herstellungskosten zu verringern, ist der rohrförmige Grundkörper 3 aus einem Kunststoff ausgestaltet, der vorzugsweise als Spritzgussteil ausgebildet ist. Eine Spritzrichtung 6 (Fig. 2) ist hierbei zumindest näherungsweise parallel zu der Längsachse 2 des rohrförmigen Grundkörpers 3 gewählt. Außerdem ist aus Stabilitätsgründen eine exzentrische Ausgestaltung von In order to improve the load capacity of the fuel distributor 1 with respect to low-pressure applications and at the same time to reduce the production costs in relation to high-pressure applications, the tubular base body 3 is made of a plastic, which is preferably designed as an injection molded part. An injection direction 6 (FIG. 2) is selected here at least approximately parallel to the longitudinal axis 2 of the tubular main body 3. In addition, for reasons of stability, an eccentric embodiment of
Durchgangsöffnungen 7, 8 an dem rohrförmigen Grundkörper 3 vorgesehen. Die Through holes 7, 8 provided on the tubular body 3. The
Durchgangsöffnungen 7, 8 veranschaulichen hierbei mögliche Ausgestaltungen für mehrere Durchgangsöffnungen, die beispielsweise entlang der Achse 2 hintereinanderliegend an dem rohrförmigen Grundkörper 3 ausgestaltet sind, um eine Verbindung mit einer entsprechenden Anzahl an Tassen des Brennstoffverteilers 1 zu ermöglichen. Solche Durchgangsöffnungen können allerdings auch für andere Zwecke dienen.  Through holes 7, 8 illustrate this case possible embodiments for a plurality of through holes, which are configured, for example along the axis 2 one behind the other on the tubular base body 3, to allow a connection with a corresponding number of cups of the fuel distributor 1. However, such through-holes can also serve for other purposes.
Die Durchgangsöffnungen 7, 8 weisen mittig durch die Durchgangsöffnung 7, 8 verlaufende Achsen 20, 21 auf. Die Durchgangsöffnungen 7, 8 münden an der Innenwand 4 in den Brennstoffraum 5. Allerdings zeigen die Achsen 20, 21 hierbei nicht auf die Längsachse 2, da die Durchgangsöffnungen 7, 8 exzentrisch zu der mittig durch den länglichen The passage openings 7, 8 have centrally through the passage opening 7, 8 extending axes 20, 21. However, the axes 20, 21 do not point to the longitudinal axis 2, since the passage openings 7, 8 eccentric to the center through the elongated
Brennstoffraum 5 verlaufenden Längsachse 2 an der Innenwand 4 des rohrförmigen Grundkörpers 3 in den Brennstoffraum 5 münden. Die Achsen 20, 21 sind hierbei jeweils exzentrisch zu der Längsachse 2 orientiert. Hierdurch wird die Belastbarkeit des  Fuel chamber 5 extending longitudinal axis 2 on the inner wall 4 of the tubular body 3 open into the fuel chamber 5. The axes 20, 21 are in each case oriented eccentrically to the longitudinal axis 2. As a result, the capacity of the
rohrförmigen Grundkörpers 3 im Bereich der Durchgangsöffnungen 7, 8 und somit insgesamt verbessert. tubular body 3 in the region of the passage openings 7, 8 and thus improved overall.
Die Innenwand 4 ist bezüglich einer Umfangsrichtung 22 von der Längsachse 2 The inner wall 4 is relative to a circumferential direction 22 of the longitudinal axis of the second
beziehungsweise dem Brennstoff räum 5 aus betrachtet weitgehend konkav ausgestaltet. Die Umfangsrichtung 22 bezieht sich hierbei auf die Längsachse 2. Allerdings ist die Innenwand 4 im Bereich der Durchgangsöffnungen 20, 21 zumindest teilweise nicht konkav ausgestaltet. Solche nicht konkaven Flächen 23, 24 sind an den Durchgangsöffnungen 7, 8 vorgesehen. Durch die nicht konkaven Flächen 23, 24 wird die Belastbarkeit im Bereich der Durchgangsöffnungen 7, 8 weiter verbessert. Die nicht konkave Fläche 23 ist hierbei als ebene Fläche 23 ausgestaltet. Die ebene Fläche 23 erstreckt sich entlang einer or considered the fuel space 5 from largely concave. The circumferential direction 22 here refers to the longitudinal axis 2. However, the inner wall 4 in the region of the passage openings 20, 21 at least partially not concave. Such non-concave surfaces 23, 24 are provided at the passage openings 7, 8. By the non-concave surfaces 23, 24, the load capacity in the region of the through holes 7, 8 is further improved. The non-concave surface 23 is here as flat surface 23 configured. The flat surface 23 extends along a
Längsrichtung 25, die in diesem Ausführungsbeispiel gleich der Spritzrichtung 6 ist, beidseitig über die Durchgangsöffnung 7. Eine Ausdehnung 26 der ebenen Fläche 23 in der Umfangsrichtung 22 bezüglich der Längsachse 2 des länglichen Brennstoffraums 5 liegt allerdings beidseitig innerhalb einer Öffnungsweite 27 der Durchgangsöffnung 7 in der Umfangsrichtung 22. Somit wird eine Wanddicke 28 im Bereich der Durchgangsöffnung 7 zwar etwas vergrößert, diese Vergrößerung ist in Bezug auf die Zykluszeit, insbesondere Kühlzeit, beim Spritzgießen aber nur unwesentlich. Somit verbessert sich die Festigkeit im Bereich der Durchgangsöffnung 7. Die verbesserte lokale Festigkeit betrifft hierbei speziell eine Bindenaht, die auch anhand der Fig. 2 beschrieben ist. A dimension 26 of the flat surface 23 in the circumferential direction 22 with respect to the longitudinal axis 2 of the elongated fuel chamber 5, however, is located on both sides within an opening width 27 of the through hole 7 in the longitudinal direction 25, which is equal to the injection direction 6 in this embodiment Circumferential direction 22. Thus, although a wall thickness 28 in the region of the passage opening 7 is somewhat increased, this increase in terms of the cycle time, in particular cooling time, during injection molding but only slightly. The strength in the region of the through opening 7 thus improves. The improved local strength in this case relates in particular to a weld line, which is also described with reference to FIG. 2.
Die nicht konkave Fläche 24 an der Durchgangsöffnung 8 ist als konvexe Fläche 24 ausgestaltet. Hierbei erstreckt sich die konvexe Fläche 24 in der Längsrichtung 25 beidseitig über die Durchgangsöffnung 8. In der Umfangsrichtung 22 ist eine Ausdehnung 29 der konvexen Fläche 24 allerdings kleiner als eine Öffnungsweite 30 der The non-concave surface 24 at the passage opening 8 is configured as a convex surface 24. In this case, the convex surface 24 extends in the longitudinal direction 25 on both sides via the passage opening 8. In the circumferential direction 22, however, an extent 29 of the convex surface 24 is smaller than an opening width 30 of the
Durchgangsöffnung 8. Hierdurch ist die im Bereich der Durchgangsöffnung 8 auftretende Vergrößerung der Wanddicke 28 volumenmäßig optimiert. Speziell kann in Bezug auf die auftretende Volumenvergrößerung im Bereich der Durchgangsöffnung 8 die Wanddicke 28 an einer Bindenaht vergleichsweise groß vorgegeben werden, ohne dass sich dies ungünstig auf die Zykluszeit, insbesondere Kühlzeit, beim Spritzgießen auswirkt.  Through opening 8. As a result, the occurring in the region of the passage opening 8 enlargement of the wall thickness 28 is optimized in terms of volume. Specifically, in relation to the occurring increase in volume in the region of the passage opening 8, the wall thickness 28 at a weld line can be set comparatively large, without this adversely affecting the cycle time, in particular cooling time, during injection molding.
Fig. 2 zeigt einen Brennstoffverteiler 1 in einer auszugsweisen, schematischen Fig. 2 shows a fuel distributor 1 in a partial, schematic
Schnittdarstellung, wobei eine Längsachse 2 des Brennstoffverteilers 1 in der Schnittebene liegt. Hierbei sind exemplarisch Durchgangsöffnungen 9 bis 15 entsprechend möglichen Ausgestaltungen der Erfindung dargestellt. Wie anhand der Fig. 1 beschrieben, sind die Durchgangsöffnungen 9 bis 15 entsprechend den Durchgangsöffnungen 7, 8 vorzugsweise auch beziehungsweise zusätzlich exzentrisch zu der mittig durch den länglichen Sectional view, wherein a longitudinal axis 2 of the fuel distributor 1 lies in the sectional plane. By way of example, passage openings 9 to 15 corresponding to possible embodiments of the invention are shown. As described with reference to FIG. 1, the passage openings 9 to 15 corresponding to the passage openings 7, 8 are preferably also or additionally eccentric to the center through the elongated
Brennstoffraum 5 verlaufenden Längsachse 2 an der Innenwand 4 des rohrförmigen Grundkörpers 3 in den Brennstoff räum 5 geführt. Fuel chamber 5 extending longitudinal axis 2 on the inner wall 4 of the tubular body 3 in the fuel space 5 out.
Die Durchgangsöffnung 9 ist zumindest näherungsweise kreisförmig ausgestaltet. The passage opening 9 is configured at least approximately circular.
Hierdurch ist eine Öffnungsweite 31 der Durchgangsöffnung 9 in der Umfangsrichtung 22 bezüglich der Längsachse 2 gleich groß wie eine Öffnungsweite 32 der Durchgangsöffnung 9 in der Längsrichtung 25 entlang der Längsachse 2. Beim Spritzgießen des rohrförmigen Grundkörpers 3 entsteht hinter der als Querbogen 9 ausgestalteten Durchgangsöffnung 9 eine Bindenaht 33. In entsprechender Weise entsteht auch hinter den In this way, an opening width 31 of the passage opening 9 in the circumferential direction 22 with respect to the longitudinal axis 2 is the same size as an opening width 32 of the passage opening 9 in the longitudinal direction 25 along the longitudinal axis 2. When injection molding the tubular base body 3 is formed behind the passage 9 designed as a transverse bow 9 a Bindenaht 33. In the same way arises behind the
Durchgangsöffnungen 10 bis 15 jeweils eine Bindenaht 34 bis 39. An der Bindenaht 33 ist die Stabilität des rohrförmigen Grundkörpers 3 beeinträchtigt. Die Durchgangsöffnung 10 ist entsprechend der Durchgangsöffnung 9 mit einem kreisförmigen Querschnitt ausgeführt. Allerdings ist die Durchgangsöffnung 10 kleiner als die Through openings 10 to 15 each have a weld line 34 to 39th At the weld line 33, the stability of the tubular base body 3 is impaired. The passage opening 10 is designed in accordance with the passage opening 9 with a circular cross-section. However, the passage opening 10 is smaller than the
Durchgangsöffnung 9 ausgeführt, so dass die Stabilität im Bereich der Bindenaht 34 weniger beeinträchtigt wird als im Bereich der Bindenaht 33 an der Durchgangsbohrung 9. Die Durchgangsöffnung 10 ist hierbei in Bezug auf den zulässigen Druck so klein wie möglich ausgeführt. Passage opening 9 carried out so that the stability in the region of the weld line 34 is less affected than in the region of the weld line 33 at the through hole 9. The passage opening 10 is in this case carried out with respect to the allowable pressure as small as possible.
Die Durchgangsöffnung 1 1 ist zumindest näherungsweise oval ausgestaltet. Hierdurch ist eine Öffnungsweite 40 der Durchgangsöffnung 1 1 in der Umfangsrichtung 22 bezüglich der Längsachse 2 größer als eine Öffnungsweite 41 der Durchgangsöffnung 1 1 in der The passage opening 1 1 is configured at least approximately oval. As a result, an opening width 40 of the passage opening 1 1 in the circumferential direction 22 with respect to the longitudinal axis 2 is greater than an opening width 41 of the passage opening 1 1 in the
Längsrichtung 25 entlang der Längsachse 2. Im Bereich der Bindenaht 35 weist ein Rand 42 der Durchgangsöffnung 1 1 hierbei seine minimale Krümmung auf. Denn die ovale Durchgangsöffnung 1 1 ist mit ihrer größeren Öffnungsweite 40 in der Umfangsrichtung 22 ausgerichtet. Hierdurch werden die im Bereich der Bindenaht 35 auftretenden Longitudinal direction 25 along the longitudinal axis 2. In the region of the weld line 35, an edge 42 of the through hole 1 1 in this case has its minimum curvature. Because the oval passage opening 1 1 is aligned with its larger opening width 40 in the circumferential direction 22. As a result, the occurring in the region of the weld line 35
mechanischen Spannungen im rohrförmigen Grundkörper 3 reduziert, so dass die reduced mechanical stresses in the tubular body 3, so that the
Festigkeit beziehungsweise Belastbarkeit des Brennstoffverteilers 1 verbessert ist. Strength or load capacity of the fuel distributor 1 is improved.
Die Durchgangsöffnung 12 ist als langlochförmige Durchgangsöffnung 12 ausgestaltet. Hierbei ist die langlochförmige Durchgangsöffnung 12 in der Umfangsrichtung 22 bezüglich der Längsachse 2 ausgerichtet. Ein Rand 43 der Durchgangsöffnung 12 weist hierdurch im Bereich der Bindenaht 36 einen geraden Abschnitt 44 auf. Hierdurch werden die im Bereich der Bindenaht 36 entstehenden Spannungen im Vergleich zu der Situation an der The passage opening 12 is designed as a slot-shaped passage opening 12. Here, the slot-shaped passage opening 12 is aligned in the circumferential direction 22 with respect to the longitudinal axis 2. As a result, an edge 43 of the passage opening 12 has a straight section 44 in the region of the weld line 36. As a result, the resulting in the region of the weld line 36 voltages compared to the situation at the
Durchgangsöffnung 1 1 noch weiter reduziert. Through hole 1 1 further reduced.
Die anhand der Durchgangsöffnung 1 1 beschriebene Situation, bei der die Öffnungsweite 40 in der Umfangsrichtung 22 größer ist als die Öffnungsweite 41 in der Längsrichtung 25, ist in entsprechender Weise auch bei den Durchgangsöffnungen 12 bis 15 verwirklicht. An der Durchgangsöffnung 13 ist im Unterschied zu der Ausgestaltung der The situation described with reference to the passage opening 1 1, in which the opening width 40 in the circumferential direction 22 is greater than the opening width 41 in the longitudinal direction 25, is realized in a corresponding manner also in the passage openings 12 to 15. At the passage opening 13 is in contrast to the embodiment of
Durchgangsöffnung 12 im Bereich der Bindenaht 37 ein konvexer Abschnitt 45 des Randes 46 ausgestaltet. Hierdurch kann bei gleichem Öffnungsquerschnitt die lokal an der  Through hole 12 in the region of the weld line 37, a convex portion 45 of the rim 46 configured. As a result, with the same opening cross-section locally at the
Bindenaht 37 wirkende mechanische Spannung in dem rohrförmigen Grundkörper 3 im Vergleich zu der anhand der Durchgangsöffnung 12 beschriebenen Situation noch weiter verringert werden. Bindenaht 37 acting stress in the tubular body 3 compared to the situation described with reference to the passage opening 12 can be further reduced.
Die anhand der Durchgangsöffnungen 12 und 13 beschriebenen Ausgestaltungen des Randes 43, 46 stellen Beispiele für Durchgangsöffnungen 12, 13 dar, die im Bereich ihrer Bindenaht 36, 37 zu der Bindenaht 36, 37 hin nicht konkav ausgestaltet sind. Der gerade Abschnitt 44 und der konvexe Abschnitt 45 sind hierbei Beispiele für nicht konkave The described with reference to the through holes 12 and 13 embodiments of the edge 43, 46 represent examples of through holes 12, 13, in the area of their Bindenaht 36, 37 are formed to the weld line 36, 37 out not concave. The straight portion 44 and the convex portion 45 are examples of non-concave
Abschnitte 44, 45. Somit können Spannungsspitzen seitlich im rohrförmigen Grundkörper 3 versetzt werden und von der Bindenaht 36, 37 entfernt werden. Speziell bei der konvexen Ausgestaltung der Durchgangsöffnung 13 zu der Bindenaht 37 hin kann der Anrisspunkt der Bindenaht 37 in einen völlig spannungsfreien Bereich verlegt werden. Die Durchgangsöffnungen 14, 15 sind exzentrisch ausgestaltet. Hierbei ist die Sections 44, 45. Thus, stress peaks can be offset laterally in the tubular base body 3 and removed from the weld line 36, 37. Specifically, in the convex configuration of the through hole 13 to the Bindenaht 37 towards the Anrisspunkt the Bindenaht 37 can be laid in a completely stress-free area. The passage openings 14, 15 are designed eccentrically. Here is the
Durchgangsöffnung 14 maximal exzentrisch ausgestaltet, wobei eine Ausbuchtung 47 an dem rohrförmigen Grundkörper 3 vorgesehen ist. Hierdurch kann die Durchgangsöffnung 14 sogar außerhalb des zylindermantelförmigen übrigen Teils der Innenwand 4 hinaus exzentrisch angeordnet werden.  Passage opening 14 designed maximally eccentric, with a bulge 47 is provided on the tubular body 3. As a result, the passage opening 14 can even be arranged eccentrically outside of the cylinder jacket-shaped remaining part of the inner wall 4.
Bei der anhand der Fig. 1 beschriebenen Ausgestaltung der Innenwand 4 mittels nicht konkaver Flächen 23, 24 ist eine Ausdehnung 50 (Fig. 2) der nicht konkaven Fläche in der Längsrichtung 25 des länglichen Brennstoffraums 5 vorzugsweise größer als die In the embodiment of the inner wall 4 described with reference to FIG. 1 by means of non-concave surfaces 23, 24, an extension 50 (FIG. 2) of the non-concave surface in the longitudinal direction 25 of the oblong fuel space 5 is preferably larger than the one
Öffnungsweite 32 der Durchgangsöffnung 9 in der Längsrichtung 25, wie es anhand der Durchgangsöffnung 9 in der Fig. 2 veranschaulicht ist. Hierbei überragt die Ausdehnung 50 die Öffnungsweite 32 zumindest auf der Seite der Bindenaht 33 und vorzugsweise beidseitig. Opening width 32 of the passage opening 9 in the longitudinal direction 25, as illustrated by the passage opening 9 in FIG. 2. In this case, the extension 50 projects beyond the opening width 32 at least on the side of the weld line 33 and preferably on both sides.
Die anhand der Fig. 1 und 2 beschriebenen möglichen Ausgestaltungen der The described with reference to FIGS. 1 and 2 possible embodiments of
Durchgangsöffnungen 7 bis 15 können auf sinnvolle Weise miteinander kombiniert werden. Vorzugsweise ist bei einer Durchgangsöffnung stets ein möglichst kleiner Querschnitt vorgegeben, wie es anhand der Durchgangsöffnung 10 beschrieben ist. Ferner ist stets eine exzentrische Ausgestaltung vorgegeben, wie es anhand der Durchgangsöffnungen 7, 8, 14, 15 beschrieben ist. Through holes 7 to 15 can be combined with each other in a meaningful way. Preferably, in the case of a through opening, the smallest possible cross section is always predetermined, as described with reference to the through opening 10. Furthermore, an eccentric configuration is always predetermined, as described with reference to the passage openings 7, 8, 14, 15.
Vorzugsweise ist auch eine nicht konkave Fläche 23, 24 an der Durchgangsöffnung vorgesehen, wie es anhand der Durchgangsöffnungen 7, 8, 9 beschrieben ist. Preferably, a non-concave surface 23, 24 is provided at the passage opening, as described with reference to the passage openings 7, 8, 9.
Außerdem ist eine Öffnungsweite 41 in der Längsrichtung 25 vorzugsweise kleiner als eine Öffnungsweite 40 in der Umfangsrichtung 22, wie es anhand der Durchgangsöffnungen 1 1 bis 13 beschrieben ist. In addition, an opening width 41 in the longitudinal direction 25 is preferably smaller than an opening width 40 in the circumferential direction 22, as described with reference to the through holes 11 to 13.
Die Erfindung ist nicht auf die beschriebenen Ausführungsbeispiele beschränkt. The invention is not limited to the described embodiments.

Claims

Ansprüche claims
1 . Brennstoffverteiler (1 ), insbesondere für Brennstoffeinspritzanlagen von 1 . Fuel distributor (1), in particular for fuel injection systems of
gemischverdichtenden, fremdgezündeten Brennkraftmaschinen, mit einem rohrförmigen Grundkörper (3), wobei eine Innenwand (4) des rohrförmigen Grundkörpers (3) einen länglichen Brennstoff räum (5) begrenzt, wobei der rohrförmige Grundkörper (3) aus einem Kunststoff gebildet ist und wobei an dem rohrförmigen Grundkörper (3) zumindest eine Durchgangsöffnung (7 - 15) vorgesehen ist, die exzentrisch zu einer mittig durch den länglichen Brennstoff räum (5) verlaufenden Längsachse (2) an der Innenwand (4) des rohrförmigen Grundkörpers (3) in den Brennstoffraum (5) mündet. mixture-compressing, spark-ignited internal combustion engine, with a tubular base body (3), wherein an inner wall (4) of the tubular base body (3) an elongated fuel cavities (5) limited, wherein the tubular base body (3) is formed of a plastic and wherein on the at least one passage opening (7-15) is provided, which is eccentric to a longitudinal axis (2) extending centrally through the elongated fuel (5) on the inner wall (4) of the tubular base body (3) into the fuel space (FIG. 5) opens.
2. Brennstoffverteiler nach Anspruch 1 , 2. Fuel distributor according to claim 1,
dadurch gekennzeichnet, characterized,
dass der rohrförmige Grundkörper (3) zumindest im Wesentlichen als Spritzgussteil (3) ausgebildet ist, wobei eine Spritzrichtung (6) zumindest näherungsweise parallel zu der Längsachse (2) ist. the tubular base body (3) is formed at least substantially as an injection molded part (3), wherein an injection direction (6) is at least approximately parallel to the longitudinal axis (2).
3. Brennstoffverteiler nach Anspruch 2, 3. Fuel distributor according to claim 2,
dadurch gekennzeichnet, characterized,
dass ein Rand (42, 43) der Durchgangsöffnung (1 1 , 12) im Bereich einer Bindenaht (36, 37) zu der Bindenaht (36, 37) hin nicht konkav ausgestaltet ist. in that an edge (42, 43) of the passage opening (11, 12) in the region of a weld line (36, 37) to the weld line (36, 37) is not concave.
4. Brennstoffverteiler nach Anspruch 2 oder 3, 4. Fuel distributor according to claim 2 or 3,
dadurch gekennzeichnet, characterized,
dass ein Rand (43) der Durchgangsöffnung (12) im Bereich der Bindenaht (36) einen zumindest näherungsweise geraden Abschnitt (44) aufweist. an edge (43) of the passage opening (12) has an at least approximately straight section (44) in the region of the weld line (36).
5. Brennstoffverteiler nach Anspruch 4, 5. fuel distributor according to claim 4,
dadurch gekennzeichnet, characterized,
dass die Durchgangsöffnung (12) als langlochförmige Durchgangsöffnung (12) ausgestaltet ist und dass die langlochförmige Durchgangsöffnung (12) in einer Umfangsrichtung (22) bezüglich der Längsachse (2) ausgerichtet ist. in that the passage opening (12) is designed as an elongated hole-shaped passage opening (12) and in that the slot-shaped passage opening (12) is aligned in a circumferential direction (22) with respect to the longitudinal axis (2).
6. Brennstoffverteiler nach Anspruch 3, dadurch gekennzeichnet, 6. fuel distributor according to claim 3, characterized,
dass ein Rand (43) der Durchgangsöffnung (13) im Bereich der Bindenaht (37) zu der Bindenaht (37) hin konvex ausgestaltet ist. in that an edge (43) of the passage opening (13) in the region of the weld line (37) to the weld line (37) is convex.
7. Brennstoffverteiler nach einem der Ansprüche 1 bis 6, 7. Fuel distributor according to one of claims 1 to 6,
dadurch gekennzeichnet, characterized,
dass eine Öffnungsweite (40) der Durchgangsöffnung (1 1 ) in einer Umfangsrichtung (22) bezüglich der Längsachse (2) größer ist als eine Öffnungsweite (41 ) der an opening width (40) of the passage opening (11) in a circumferential direction (22) is greater than an opening width (41) of the longitudinal axis (2)
Durchgangsöffnung (1 1 ) in einer Längsrichtung (25) entlang der Längsachse (2). Through opening (1 1) in a longitudinal direction (25) along the longitudinal axis (2).
8. Brennstoffverteiler nach einem der Ansprüche 1 bis 7, 8. Fuel distributor according to one of claims 1 to 7,
dadurch gekennzeichnet, characterized,
dass an der Innenwand (4) des rohrförmigen Grundkörpers (3) im Bereich der that on the inner wall (4) of the tubular base body (3) in the region of
Durchgangsöffnung (7, 8) eine nicht konkave Fläche (23, 24) ausgestaltet ist, in der die Durchgangsöffnung (7, 8) zumindest teilweise liegt. Through hole (7, 8) a non-concave surface (23, 24) is configured, in which the passage opening (7, 8) is at least partially.
9. Brennstoffverteiler nach Anspruch 8, 9. fuel distributor according to claim 8,
dadurch gekennzeichnet, characterized,
dass eine Ausdehnung (50) der nicht konkaven Fläche (23, 24) in einer Längsrichtung (25) entlang der Längsachse (2) des länglichen Brennstoffraums (5) eine Öffnungsweite (32) der Durchgangsöffnung (9) in der Längsrichtung (25) zumindest einseitig überragt. an extension (50) of the non-concave surface (23, 24) in a longitudinal direction (25) along the longitudinal axis (2) of the oblong fuel space (5) has an opening width (32) of the passage opening (9) in the longitudinal direction (25) at least surmounted on one side.
10. Brennstoffverteiler nach Anspruch 8 oder 9, 10. Fuel distributor according to claim 8 or 9,
dadurch gekennzeichnet, characterized,
dass eine Ausdehnung (26, 29) der nicht konkaven Fläche (23, 24) in einer that an extension (26, 29) of the non-concave surface (23, 24) in one
Umfangsrichtung (22) bezüglich der Längsachse (2) des länglichen Brennstoffraums (5) beidseitig innerhalb einer Öffnungsweite (27, 30) der Durchgangsöffnung (7, 8) in der Umfangsrichtung (22) liegt.  Circumferential direction (22) with respect to the longitudinal axis (2) of the elongated fuel chamber (5) on both sides within an opening width (27, 30) of the through hole (7, 8) in the circumferential direction (22).
1 1. Brennstoffverteiler nach einem der Ansprüche 8 bis 10, 1 1. Fuel distributor according to one of claims 8 to 10,
dadurch gekennzeichnet, characterized,
dass die nicht konkave Fläche (23) an der Innenwand (4) als zumindest näherungsweise ebene Fläche (23) ausgestaltet ist. in that the non-concave surface (23) on the inner wall (4) is designed as an at least approximately flat surface (23).
EP12709851.5A 2011-05-02 2012-03-15 Fuel distributor Not-in-force EP2705242B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE201110075054 DE102011075054A1 (en) 2011-05-02 2011-05-02 fuel distributor
PCT/EP2012/054529 WO2012150075A1 (en) 2011-05-02 2012-03-15 Fuel distributor

Publications (2)

Publication Number Publication Date
EP2705242A1 true EP2705242A1 (en) 2014-03-12
EP2705242B1 EP2705242B1 (en) 2016-03-09

Family

ID=45872943

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12709851.5A Not-in-force EP2705242B1 (en) 2011-05-02 2012-03-15 Fuel distributor

Country Status (6)

Country Link
EP (1) EP2705242B1 (en)
CN (1) CN103502625B (en)
DE (1) DE102011075054A1 (en)
PL (1) PL2705242T3 (en)
RU (1) RU2603713C2 (en)
WO (1) WO2012150075A1 (en)

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Publication number Priority date Publication date Assignee Title
FR3043750B1 (en) * 2015-11-17 2018-06-08 Akwel PRESSURIZED FLUID CONDUIT, METHOD OF MANUFACTURING THE SAME, AND TRANSPORT METHOD USING SUCH CONDUIT

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Also Published As

Publication number Publication date
DE102011075054A1 (en) 2012-11-08
WO2012150075A1 (en) 2012-11-08
CN103502625A (en) 2014-01-08
RU2603713C2 (en) 2016-11-27
RU2013153136A (en) 2015-06-10
CN103502625B (en) 2017-06-09
PL2705242T3 (en) 2016-09-30
EP2705242B1 (en) 2016-03-09

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