EP2147208A1 - Area of intersection between a high-pressure chamber and a high-pressure duct - Google Patents

Area of intersection between a high-pressure chamber and a high-pressure duct

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Publication number
EP2147208A1
EP2147208A1 EP08735899A EP08735899A EP2147208A1 EP 2147208 A1 EP2147208 A1 EP 2147208A1 EP 08735899 A EP08735899 A EP 08735899A EP 08735899 A EP08735899 A EP 08735899A EP 2147208 A1 EP2147208 A1 EP 2147208A1
Authority
EP
European Patent Office
Prior art keywords
region
pressure
intersection
pressure chamber
section
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
EP08735899A
Other languages
German (de)
French (fr)
Other versions
EP2147208B1 (en
Inventor
Dominikus Hofmann
Nadja Eisenmenger
Hans-Christoph Magel
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 EP2147208A1 publication Critical patent/EP2147208A1/en
Application granted granted Critical
Publication of EP2147208B1 publication Critical patent/EP2147208B1/en
Not-in-force legal-status Critical Current
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
    • 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
    • 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
    • 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
    • F02M61/162—Means to impart a whirling motion to fuel upstream or near discharging orifices

Definitions

  • the invention relates to an intersection region between a high-pressure chamber and a high-pressure channel.
  • the object of the invention is to increase the high pressure resistance in the area of intersection between a high pressure chamber and a high pressure passage.
  • intersection region comprises at least one planar region or an area which is significantly less curved than the remaining intersection region.
  • the flat area can also be made only approximately flat.
  • the high pressure chamber and the high pressure channel are also called functional rooms.
  • the planar or approximately flat region creates a cutting geometry in which tensile stresses of the functional spaces occurring under pressure are not directly superimposed and added together as in the case of conventional intersecting geometries.
  • the plane region in the intersection region ensures that compressive stresses or significantly reduced tensile stresses occur locally in the intersection geometry according to the invention under pressure in an inner wall of the high-pressure chamber in the region of the intersection, which then overlap with the tensile stresses in an inner wall of the high-pressure channel. Since, in the case of the inventive intersection geometry, a tensile stress superimposed with a reduced tensile stress or, in the best case, with a compressive stress, the sum is lower and thus the maximum occurring stress is significantly reduced.
  • a preferred embodiment of the Verscheit- range is characterized in that the high-pressure channel has a smaller diameter than the high-pressure chamber.
  • the high-pressure chamber is preferably a chamber in an injector housing of a fuel injector which is filled with high-pressure fuel via a high-pressure inlet.
  • a further preferred exemplary embodiment of the intersecting region is characterized in that a cylinder jacket surface of the high-pressure chamber in the intersection region has the flat region or the region which is significantly weaker. bends as the rest of the intersection area.
  • the cross-section of the high-pressure chamber is preferably changed by removing material in such a way that a flat or approximately flat region is formed.
  • Another preferred exemplary embodiment of the intersecting region is characterized in that the high-pressure channel opens into the high-pressure chamber in the planar region.
  • the outlet of the high-pressure channel is placed according to an essential aspect of the invention in or on the flat or approximately flat region.
  • intersecting region are characterized in that the transition region between the planar region and the high-pressure chamber or the high-pressure channel is rounded. As a result, undesired voltages can be further reduced.
  • a further preferred exemplary embodiment of the intersecting region is characterized in that the planar region extends parallel to the longitudinal axis of the high-pressure chamber.
  • the planar region extends over part of the length of the high-pressure chamber and then merges into a cylinder jacket surface.
  • the flat region can also extend over the entire length of the high-pressure chamber.
  • a further preferred exemplary embodiment of the intersecting region is characterized in that the high-pressure chamber, viewed in cross-section, - A -
  • the tet has two circular arcs, which merge at one end in the flat area.
  • the circular arcs are preferably semicircles, which are connected at their ends opposite the flat surface by a further flat or approximately flat region.
  • a further preferred exemplary embodiment of the intersecting region is characterized in that the high-pressure chamber, seen in cross-section, has two elliptical arcs which merge into the planar region at one end.
  • the planar region is arranged parallel to the major axis of the ellipse to which the two elliptical arcs belong.
  • a further preferred exemplary embodiment of the intersecting region is characterized in that the high-pressure chamber has, viewed in cross-section, two further planar regions, which are arranged perpendicular to the planar region from which they originate and merge into the cylinder jacket surface.
  • the three flat areas form a U-shaped cross-section with a base and two legs.
  • the high-pressure channel opens into the base.
  • the two legs go into the cylinder surface, which is reduced in the intersection of a semi-circular cross-section.
  • FIG. 1 shows a conventional component with a cross section in the quarter section
  • Figure 2 shows a component with an inventive
  • Figure 3 shows a component according to another embodiment with two opposite planar areas in cross section
  • Figure 4 shows a component according to another embodiment in cross section with an obliquely extending high-pressure bore
  • FIG. 5 shows a component according to a further exemplary embodiment in cross section with three identical regions.
  • FIGS. 1 to 5 a component of a solenoid valve device is shown in section.
  • the component is a part of an injector housing of a fuel injector which serves to inject high-pressure fuel into a combustion chamber of an internal combustion engine.
  • the 1 shows a conventional injector housing 1 with a high-pressure bore 2, which can also be used as a high-pressure bore 2. is called pressure chamber, shown in cross-section or in quarter section.
  • the high-pressure bore 2 has an inner diameter of 8.52 mm in the illustrated high-pressure bore section 3.
  • the injector housing 1 has an outer diameter of 28.5 mm.
  • the high-pressure bore section 3 has the shape of a circular cylinder jacket surface whose longitudinal axis runs perpendicular to the plane of the drawing.
  • a high-pressure bore 6 extending transversely to the cylinder jacket surface, which is also referred to as a high-pressure passage, opens into the high-pressure bore section 3.
  • the high-pressure bore 6 has a diameter of 1.3 mm.
  • the transition region between see the high-pressure bore 6 and the high-pressure bore section 3, which is also referred to as intersection region 5, is rounded with a radius R of 0.3 mm.
  • various chambers In hydraulic systems, various chambers must be pressurized and relieved again.
  • the connections between a smaller bore, for example a high-pressure inlet into a pressure chamber, for example the interior of a fuel injector, are subjected to the highest pressures.
  • the high-pressure chamber is usually a bore.
  • the high pressure supply line is also a bore. The point of intersection between the high-pressure chamber and the bore is usually the most heavily loaded.
  • the cross-section of the high-pressure bore section which is in itself cylindrical, is locally changed so that at least one approximately flat surface is formed in the intersection region.
  • the flat surface is preferably formed by removal of material, but may also be formed by adding material.
  • the bore exit of the high pressure inlet bore is applied to this approximately flat surface.
  • FIG. 2 shows an injector housing 11 according to the invention with a high-pressure bore 12, which is also referred to as a high-pressure chamber.
  • the injector housing 11 has an outer diameter of 28.5 mm. That is, the injector case 11 has the same outer diameter as the injector case 1 shown in FIG. 1.
  • the high-pressure bore 12 includes a high-pressure bore portion 13 having an inner diameter of 12 mm. The inner diameter of the high-pressure bore 13 is therefore slightly larger than in the injector housing 1 shown in FIG.
  • a transverse high-pressure bore 16 which is also referred to as a high-pressure channel, opens into the high-pressure bore section 13.
  • the high-pressure bore 16 has the same diameter as in the injector housing 1 shown in FIG. 1, namely 1.3 mm.
  • a dashed circular arc 18 in the high-pressure bore portion 13 a circular cylinder jacket surface is indicated.
  • a planar region 19 is formed in the intersection region, in which the high-pressure bore 16 into the high-pressure bore section 13 empties.
  • the transition region between the flat region 19 and the high-pressure bore section 13 is rounded, with a radius of 3 mm.
  • the transition region between the flat region 19 and the high pressure bore 16 is also rounded, with a radius of 0.3 mm.
  • the flat region 19 extends perpendicular to the plane of the drawing and parallel to the longitudinal axis of the high-pressure bore 12.
  • the distance between the flat region 19 and the longitudinal axis of the high-pressure bore 12 is 8, 52 mm in the embodiment illustrated in FIG.
  • the high-pressure bore 22 comprises a high-pressure bore section 23 whose cross-section is changed according to the invention in a cutting region 25 in which a high-pressure bore 26, which is also referred to as a high-pressure passage, opens into the high-pressure bore section 23.
  • Dimensioning arrows 28 and 29 denote the intersection geometry according to the invention. By further dimension arrows 31, 32 is designated the original cylindrical geometry. By further dimensioning arrows 34, 35 two opposite planar areas are designated. In one of the planar regions, the high-pressure bore 26 opens into the high-pressure bore section 23. The second planar region is arranged exactly opposite the mouth region of the high-pressure bore 26.
  • FIG. 4 shows a similar injector housing 21 as in FIG. 3 in cross-section.
  • a high-pressure bore 36 which is also referred to as a supply bore or high-pressure passage, is fed obliquely, which leads to smaller stresses on the inner wall of the inlet bore.
  • the high-pressure bore 36 may be additionally or alternatively supplied with an elevation angle which deviates from 90 degrees.
  • FIG. 5 shows an injector housing 41 with a high-pressure bore or high-pressure chamber 42 in cross-section.
  • the high-pressure bore 42 comprises a high-pressure bore section 43, which essentially has the shape of a circular cylinder jacket.
  • a Verschneidungs Society 45 opens a transverse high-pressure bore 46, which is also referred to as a high-pressure channel, in the high-pressure bore portion 43.
  • the original nikzylin- derummantelförmige shape of the high-pressure bore portion 43 is changed so that three flat areas 61, 62 and 63 are created.
  • the two planar regions 61 and 62 extend parallel to the high-pressure bore 46 and pass tangentially into the high-pressure bore section 43.
  • the planar region 63 extends between two dimensioning arrows 64 and 65 perpendicular to the high-pressure bore 46, which opens into the high-pressure bore section 43 within the planar region 63.
  • the three planar regions 61 to 63 form a substantially U-shaped cross section in the intersecting region 45.
  • the flat portion 63 is the base of the U-shaped cross section.
  • the two planar portions 61 and 62 form the legs of the U-shaped cross section, wherein the Ü- transition areas between the flat portions 61, 62 and the flat portion 63 are rounded ,

Landscapes

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

Abstract

The invention relates to an area of intersection between a high-pressure chamber (12, 13) and a high-pressure duct (16). The area of intersection according to the invention is characterized by at least one planar area (19) or an area that has substantially less curvature than the remaining area of intersection.

Description

Beschreibungdescription
Verschneidungsbereich zwischen einer Hochdruckkam- mer und einem HochdruckkanalIntersection area between a high pressure chamber and a high pressure channel
Die Erfindung betrifft einen Verschneidungsbereich zwischen einer Hochdruckkammer und einem Hochdruckkanal .The invention relates to an intersection region between a high-pressure chamber and a high-pressure channel.
Stand der TechnikState of the art
Zu Erhöhung der Festigkeit im Verschneidungsbereich ist es möglich, den Verschneidungsbereich zu verrunden .To increase the strength in the intersection area, it is possible to round off the intersection area.
Offenbarung der ErfindungDisclosure of the invention
Aufgabe der Erfindung ist es, die Hochdruckfestigkeit im Verschneidungsbereich zwischen einer Hochdruckkammer und einem Hochdruckkanal zu erhöhen.The object of the invention is to increase the high pressure resistance in the area of intersection between a high pressure chamber and a high pressure passage.
Die Aufgabe ist bei einem Verschneidungsbereich zwischen einer Hochdruckkammer und einem Hochdruckkanal, dadurch gelöst, dass der Verschneidungsbereich mindestens einen ebenen Bereich oder einen Bereich umfasst, der deutlich schwächer gekrümmt als der übrige Verschneidungsbereich ist. Der ebene Bereich kann auch nur annähernd eben ausgeführt sein. Die Hochdruckkammer und der Hochdruckkanal werden auch als Funktionsräume bezeichnet. Durch den ebenen oder annähern ebenen Bereich wird eine Verschneidungsgeometrie geschaffen, bei der sich unter Druckbeaufschlagung auftretende Zugspannungen der Funktionsräume nicht wie bei herkömmlichen Ver- schneidungsgeometrien direkt überlagern und addieren. Durch den ebenen Bereich im Verschneidungsbe- reich wird erreicht, dass bei der erfindungsgemäßen Verschneidungsgeometrie unter Druck in einer Innen- wand der Hochdruckkammer im Bereich der Verschneidung lokal Druckspannungen beziehungsweise deutlich reduzierte Zugspannungen auftreten, die sich dann mit den Zugspannungen in einer Innenwand des Hochdruckkanals überlagern. Da sich bei der erfindungs- gemäßen Verschneidungsgeometrie eine Zugspannung mit einer reduzierten Zugspannung oder im besten Fall mit einer Druckspannung überlagert, ist die Summe geringer und damit die maximal auftretende Spannung deutlich reduziert.The object is achieved in a region of intersection between a high-pressure chamber and a high-pressure channel, in that the intersection region comprises at least one planar region or an area which is significantly less curved than the remaining intersection region. The flat area can also be made only approximately flat. The high pressure chamber and the high pressure channel are also called functional rooms. The planar or approximately flat region creates a cutting geometry in which tensile stresses of the functional spaces occurring under pressure are not directly superimposed and added together as in the case of conventional intersecting geometries. The plane region in the intersection region ensures that compressive stresses or significantly reduced tensile stresses occur locally in the intersection geometry according to the invention under pressure in an inner wall of the high-pressure chamber in the region of the intersection, which then overlap with the tensile stresses in an inner wall of the high-pressure channel. Since, in the case of the inventive intersection geometry, a tensile stress superimposed with a reduced tensile stress or, in the best case, with a compressive stress, the sum is lower and thus the maximum occurring stress is significantly reduced.
Ein bevorzugtes Ausführungsbeispiel des Verschnei- dungsbereichs ist dadurch gekennzeichnet, dass der Hochdruckkanal einen kleineren Durchmesser als die Hochdruckkammer aufweist. Bei der Hochdruckkammer handelt es sich vorzugsweise um eine Kammer in einem Injektorgehäuse eines Kraftstoffinjektors, die über einen Hochdruckzulauf mit unter hohem Druck stehenden Kraftstoff befüllt wird.A preferred embodiment of the Verscheit- range is characterized in that the high-pressure channel has a smaller diameter than the high-pressure chamber. The high-pressure chamber is preferably a chamber in an injector housing of a fuel injector which is filled with high-pressure fuel via a high-pressure inlet.
Ein weiteres bevorzugtes Ausführungsbeispiel des Verschneidungsbereichs ist dadurch gekennzeichnet, dass eine Zylindermantelfläche der Hochdruckkammer im Verschneidungsbereich den ebenen Bereich oder den Bereich aufweist, der deutlich schwächer ge- krümmt als der übrige Verschneidungsbereich ist. Gemäß einem wesentlichen Aspekt der Erfindung wird der Querschnitt der Hochdruckkammer vorzugsweise durch Entnahme von Material so verändert, dass ein ebener oder annähernd ebener Bereich entsteht.A further preferred exemplary embodiment of the intersecting region is characterized in that a cylinder jacket surface of the high-pressure chamber in the intersection region has the flat region or the region which is significantly weaker. bends as the rest of the intersection area. According to one essential aspect of the invention, the cross-section of the high-pressure chamber is preferably changed by removing material in such a way that a flat or approximately flat region is formed.
Ein weiteres bevorzugtes Ausführungsbeispiel des Verschneidungsbereichs ist dadurch gekennzeichnet, dass der Hochdruckkanal in dem ebenen Bereich in die Hochdruckkammer mündet. Der Austritt des Hochdruckkanals wird gemäß einem wesentlichen Aspekt der Erfindung in beziehungsweise an den ebenen oder annähernd ebenen Bereich gelegt.Another preferred exemplary embodiment of the intersecting region is characterized in that the high-pressure channel opens into the high-pressure chamber in the planar region. The outlet of the high-pressure channel is placed according to an essential aspect of the invention in or on the flat or approximately flat region.
Weitere bevorzugte Ausführungsbeispiele des Verschneidungsbereichs sind dadurch gekennzeichnet, dass der Übergangsbereich zwischen dem ebenen Bereich und der Hochdruckkammer beziehungsweise dem Hochdruckkanal verrundet ist. Dadurch können uner- wünschte Spannungen weiter reduziert werden.Further preferred embodiments of the intersecting region are characterized in that the transition region between the planar region and the high-pressure chamber or the high-pressure channel is rounded. As a result, undesired voltages can be further reduced.
Ein weiteres bevorzugtes Ausführungsbeispiel des Verschneidungsbereichs ist dadurch gekennzeichnet, dass sich der ebene Bereich parallel zur Längsachse der Hochdruckkammer erstreckt. Vorzugsweise erstreckt sich der ebene Bereich über einen Teil der Länge der Hochdruckkammer und geht dann in eine Zylindermantelfläche über. Der ebene Bereich kann sich aber auch über die gesamte Länge der Hoch- druckkammer erstrecken.A further preferred exemplary embodiment of the intersecting region is characterized in that the planar region extends parallel to the longitudinal axis of the high-pressure chamber. Preferably, the planar region extends over part of the length of the high-pressure chamber and then merges into a cylinder jacket surface. However, the flat region can also extend over the entire length of the high-pressure chamber.
Ein weiteres bevorzugtes Ausführungsbeispiel des Verschneidungsbereichs ist dadurch gekennzeichnet, dass die Hochdruckkammer, im Querschnitt betrach- - A -A further preferred exemplary embodiment of the intersecting region is characterized in that the high-pressure chamber, viewed in cross-section, - A -
tet, zwei Kreisbögen aufweist, die an einem Ende in den ebenen Bereich übergehen. Bei den Kreisbögen handelt es sich vorzugsweise um Halbkreise, die an ihren der ebenen Fläche gegenüberliegenden Enden durch einen weiteren ebenen oder annähernd ebenen Bereich verbunden sind.tet, has two circular arcs, which merge at one end in the flat area. The circular arcs are preferably semicircles, which are connected at their ends opposite the flat surface by a further flat or approximately flat region.
Ein weiteres bevorzugtes Ausführungsbeispiel des Verschneidungsbereichs ist dadurch gekennzeichnet, dass die Hochdruckkammer, im Querschnitt betrachtet, zwei Ellipsenbögen aufweist, die an einem Ende in den ebenen Bereich übergehen. Vorzugsweise ist der ebene Bereich parallel zu der Hauptachse der Ellipse angeordnet, zu der die zwei Ellipsenbögen gehören.A further preferred exemplary embodiment of the intersecting region is characterized in that the high-pressure chamber, seen in cross-section, has two elliptical arcs which merge into the planar region at one end. Preferably, the planar region is arranged parallel to the major axis of the ellipse to which the two elliptical arcs belong.
Ein weiteres bevorzugtes Ausführungsbeispiel des Verschneidungsbereichs ist dadurch gekennzeichnet, dass die Hochdruckkammer, im Querschnitt betrach- tet, zwei weitere ebene Bereiche aufweist, die senkrecht zu dem ebenen Bereich angeordnet sind, von dem sie ausgehen und in die Zylindermantelfläche übergehen. Die drei ebenen Bereiche bilden einen U-förmigen Querschnitt mit einer Basis und zwei Schenkeln. In die Basis mündet der Hochdruckkanal. Die beiden Schenkel gehen in die Zylindermantelfläche über, die in dem Verschneidungsbereich auf einen halbkreisförmigen Querschnitt reduziert ist.A further preferred exemplary embodiment of the intersecting region is characterized in that the high-pressure chamber has, viewed in cross-section, two further planar regions, which are arranged perpendicular to the planar region from which they originate and merge into the cylinder jacket surface. The three flat areas form a U-shaped cross-section with a base and two legs. The high-pressure channel opens into the base. The two legs go into the cylinder surface, which is reduced in the intersection of a semi-circular cross-section.
Weitere Vorteile, Merkmale und Einzelheiten der Erfindung ergeben sich aus der nachfolgenden Beschreibung, in der unter Bezugnahme auf die Zeichnung verschiedene Ausführungsbeispiele im Einzelnen beschrieben sind. Kurze Beschreibung der ZeichnungFurther advantages, features and details of the invention will become apparent from the following description in which, with reference to the drawings, various embodiments are described in detail. Short description of the drawing
Es zeigen:Show it:
Figur 1 ein herkömmliches Bauteil mit einem Ver- schneidungsbereich im Viertelschnitt;FIG. 1 shows a conventional component with a cross section in the quarter section;
Figur 2 ein Bauteil mit einem erfindungsgemäßenFigure 2 shows a component with an inventive
Verschneidungsbereich im Viertelschnitt;Intersection area in quarter section;
Figur 3 ein Bauteil gemäß einem weiteren Ausführungsbeispiel mit zwei gegenüberliegenden ebenen Bereichen im Querschnitt;Figure 3 shows a component according to another embodiment with two opposite planar areas in cross section;
Figur 4 ein Bauteil gemäß einem weiteren Ausführungsbeispiel im Querschnitt mit einer schräg verlaufenden Hochdruckbohrung undFigure 4 shows a component according to another embodiment in cross section with an obliquely extending high-pressure bore and
Figur 5 ein Bauteil gemäß einem weiteren Ausfüh- rungsbeispiel im Querschnitt mit drei e- benen Bereichen.FIG. 5 shows a component according to a further exemplary embodiment in cross section with three identical regions.
Beschreibung der AusführungsbeispieleDescription of the embodiments
In den Figuren 1 bis 5 ist jeweils ein Bauteil einer Magnetventileinrichtung im Schnitt dargestellt. Bei dem Bauteil handelt es sich um einen Teil eines Injektorgehäuses eines Kraftstoffinj ektors, der dazu dient, mit Hochdruck beaufschlagten Kraftstoff in einen Brennraum einer Brennkraftmaschine einzuspritzen .In FIGS. 1 to 5, a component of a solenoid valve device is shown in section. The component is a part of an injector housing of a fuel injector which serves to inject high-pressure fuel into a combustion chamber of an internal combustion engine.
In Figur 1 ist ein herkömmliches Injektorgehäuse 1 mit einer Hochdruckbohrung 2, die auch als Hoch- druckkammer bezeichnet wird, im Querschnitt beziehungsweise im Viertelschnitt dargestellt. Die Hochdruckbohrung 2 hat in dem dargestellten Hochdruckbohrungsabschnitt 3 einen Innendurchmesser von 8,52 mm. Das Injektorgehäuse 1 weist einen Außendurchmesser von 28,5 mm auf. Der Hochdruckbohrungsabschnitt 3 hat die Gestalt einer Kreiszylindermantelfläche, deren Längsachse senkrecht zur Zeichenebene verläuft. In einem Verschneidungsbereich 5 mündet eine quer zu der Zylindermantelfläche verlaufende Hochdruckbohrung 6, die auch als Hochdruckkanal bezeichnet wird, in den Hochdruckbohrungsabschnitt 3. Die Hochdruckbohrung 6 hat einen Durchmesser von 1,3 mm. Der Übergangsbereich zwi- sehen der Hochdruckbohrung 6 und dem Hochdruckbohrungsabschnitt 3, der auch als Verschneidungsbereich 5 bezeichnet wird, ist mit einem Radius R von 0,3 mm verrundet.1 shows a conventional injector housing 1 with a high-pressure bore 2, which can also be used as a high-pressure bore 2. is called pressure chamber, shown in cross-section or in quarter section. The high-pressure bore 2 has an inner diameter of 8.52 mm in the illustrated high-pressure bore section 3. The injector housing 1 has an outer diameter of 28.5 mm. The high-pressure bore section 3 has the shape of a circular cylinder jacket surface whose longitudinal axis runs perpendicular to the plane of the drawing. In a region of intersection 5, a high-pressure bore 6 extending transversely to the cylinder jacket surface, which is also referred to as a high-pressure passage, opens into the high-pressure bore section 3. The high-pressure bore 6 has a diameter of 1.3 mm. The transition region between see the high-pressure bore 6 and the high-pressure bore section 3, which is also referred to as intersection region 5, is rounded with a radius R of 0.3 mm.
In hydraulischen Systemen müssen diverse Kammern mit Druck beaufschlagt und wieder entlastet werden. Die Verbindungen zwischen einer kleineren Bohrung, zum Beispiel einem Hochdruckzulauf in eine Druckkammer, zum Beispiel das Innere eines Kraftstoffin- jektors, wird höchsten Drücken ausgesetzt. Der Hochdruckraum ist in der Regel eine Bohrung. Die Hochdruckzulaufleitung ist ebenfalls eine Bohrung. Die Verschneidungsstelle zwischen Hochdruckraum und Bohrung ist gewöhnlich am Stärksten belastet.In hydraulic systems, various chambers must be pressurized and relieved again. The connections between a smaller bore, for example a high-pressure inlet into a pressure chamber, for example the interior of a fuel injector, are subjected to the highest pressures. The high-pressure chamber is usually a bore. The high pressure supply line is also a bore. The point of intersection between the high-pressure chamber and the bore is usually the most heavily loaded.
Bei den heute üblichen Drücken in Kraftstoffinjek- toren wird, wie in Figur 1 dargestellt ist, über Verrunden des Verschneidungsbereichs 5 versucht, die Bauteilspannungen in einen zulässigen Bereich abzusenken. Außerdem wird versucht, über verschiedene Winkel zwischen den Bohrungen zueinander die Bauteilspannungen zu reduzieren. Bei den meisten Verschneidungsgeometrien treten unter Druck im Ver- schneidungsbereich an der Innenwand der Hochdruckbohrung beziehungsweise des Hochdruckbohrungsabschnitts beziehungsweise der Hochdruckkammer Zugspannungen auf. Im Verschneidungsbereich überlagern und addieren sich diese Zugspannungen lokal und es kommt zu Spannungsspitzen. Über verschiedene Eintrittswinkel zwischen Zulaufbohrung beziehungsweise Hochdruckkanal und Hochdruckkammer wird erreicht, dass die Austrittsstelle der kleinen Bohrung nicht rund sondern elliptisch wird. Da die tangentialen Zugspannungen so günstiger umgelenkt werden, kann die Kerbwirkung reduziert werden.As is shown in FIG. 1, with the pressures in fuel injectors customary today, it is attempted by rounding off the intersection region 5 that the component stresses are within a permissible range lower. In addition, an attempt is made to reduce the component voltages by means of different angles between the bores. In most intersection geometries, tensile stresses occur under pressure in the intersection region on the inner wall of the high-pressure bore or of the high-pressure bore section or of the high-pressure chamber. In the intersection area, these tensile stresses overlap and add up locally, leading to voltage peaks. Through different inlet angles between inlet bore or high-pressure channel and high-pressure chamber it is achieved that the exit point of the small bore does not become round but elliptical. Since the tangential tensile stresses are redirected so favorably, the notch effect can be reduced.
Gemäß der vorliegenden Erfindung wird der Querschnitt des an sich zylindrischen Hochdruckboh- rungsabschnitts lokal so verändert, dass im Verschneidungsbereich mindestens eine annähernd ebene Fläche entsteht. Die ebene Fläche wird vorzugsweise durch Wegnahme von Material gebildet, kann aber auch durch Hinzufügen von Material gebildet werden. Der Bohrungsaustritt der Hochdruckzulaufbohrung wird an diese annähernd ebene Fläche angelegt.According to the present invention, the cross-section of the high-pressure bore section, which is in itself cylindrical, is locally changed so that at least one approximately flat surface is formed in the intersection region. The flat surface is preferably formed by removal of material, but may also be formed by adding material. The bore exit of the high pressure inlet bore is applied to this approximately flat surface.
Wenn der Kraftstoffinjektor beziehungsweise der Hochdruckbohrungsabschnitt mit Druck beaufschlagt wird, dann möchte die Innengeometrie, wie jeder Behälter, unter Innendruck einen kreisförmigen Querschnitt einnehmen. Das führt zu einer Verwölbung der anfänglich ebenen Fläche nach außen, was an der Innenseite Druckspannungen generiert. Die Zulauf- bohrung mit ihrem kreisförmigen Querschnitt verursacht weiterhin auf ihrer Innenseite Zugspannungen. Diese überlagern sich an der Austrittsstelle jedoch nicht mehr mit den üblichen Zugspannungen der Hoch- druckkammer, sondern mit Druckspannungen oder geringen Zugspannungen im Bereich der Abflachung. Dadurch können unerwünschte Spannungsüberhöhungen vermieden werden.When the fuel injector or the high-pressure bore section is pressurized, then, like any container, the internal geometry would like to assume a circular cross-section under internal pressure. This leads to a warping of the initially flat surface to the outside, which generates compressive stresses on the inside. The feed Hole with its circular cross-section continues to cause tensile stresses on its inside. However, these no longer overlap at the exit point with the usual tensile stresses of the high-pressure chamber, but with compressive stresses or low tensile stresses in the region of the flattening. As a result, unwanted voltage increases can be avoided.
In Figur 2 ist ein erfindungsgemäßes Injektorgehäuse 11 mit einer Hochdruckbohrung 12, die auch als Hochdruckkammer bezeichnet wird, dargestellt. Das Injektorgehäuse 11 hat einen Außendurchmesser von 28,5 mm. Das heißt, das Injektorgehäuse 11 hat den gleichen Außendurchmesser wie das in Figur 1 dargestellte Injektorgehäuse 1. Die Hochdruckbohrung 12 umfasst einen Hochdruckbohrungsabschnitt 13 mit einem Innendurchmesser von 12 mm. Der Innendurchmesser der Hochdruckbohrung 13 ist also etwas größer als bei dem in Figur 1 dargestellten Injektorgehäuse 1.FIG. 2 shows an injector housing 11 according to the invention with a high-pressure bore 12, which is also referred to as a high-pressure chamber. The injector housing 11 has an outer diameter of 28.5 mm. That is, the injector case 11 has the same outer diameter as the injector case 1 shown in FIG. 1. The high-pressure bore 12 includes a high-pressure bore portion 13 having an inner diameter of 12 mm. The inner diameter of the high-pressure bore 13 is therefore slightly larger than in the injector housing 1 shown in FIG.
In einem Verschneidungsbereich mündet eine quer verlaufende Hochdruckbohrung 16, die auch als Hoch- druckkanal bezeichnet wird, in den Hochdruckbohrungsabschnitt 13. Die Hochdruckbohrung 16 hat den gleichen Durchmesser wie bei dem in Figur 1 dargestellten Injektorgehäuse 1, nämlich 1,3 mm. Durch einen gestrichelten Kreisbogen 18 ist in dem Hoch- druckbohrungsabschnitt 13 eine Kreiszylindermantelfläche angedeutet. Gemäß einem wesentlichen Aspekt der Erfindung ist im Verschneidungsbereich ein ebener Bereich 19 ausgebildet, in dem die Hochdruckbohrung 16 in den Hochdruckbohrungsabschnitt 13 mündet. Der Übergangsbereich zwischen dem ebenen Bereich 19 und dem Hochdruckbohrungsabschnitt 13 ist verrundet, und zwar mit einem Radius von 3 mm. Der Übergangsbereich zwischen dem ebenen Bereich 19 und der Hochdruckbohrung 16 ist ebenfalls verrundet, und zwar mit einem Radius von 0,3 mm. Der ebene Bereich 19 erstreckt sich senkrecht zur Zeichenebene und parallel zur Längsachse der Hochdruckbohrung 12. Der Abstand zwischen dem ebenen Bereich 19 und der Längsachse der Hochdruckbohrung 12 beträgt bei dem in Figur 2 dargestellten Ausführungsbeispiel 8, 52 mm.In a region of intersection, a transverse high-pressure bore 16, which is also referred to as a high-pressure channel, opens into the high-pressure bore section 13. The high-pressure bore 16 has the same diameter as in the injector housing 1 shown in FIG. 1, namely 1.3 mm. By a dashed circular arc 18 in the high-pressure bore portion 13, a circular cylinder jacket surface is indicated. According to one essential aspect of the invention, a planar region 19 is formed in the intersection region, in which the high-pressure bore 16 into the high-pressure bore section 13 empties. The transition region between the flat region 19 and the high-pressure bore section 13 is rounded, with a radius of 3 mm. The transition region between the flat region 19 and the high pressure bore 16 is also rounded, with a radius of 0.3 mm. The flat region 19 extends perpendicular to the plane of the drawing and parallel to the longitudinal axis of the high-pressure bore 12. The distance between the flat region 19 and the longitudinal axis of the high-pressure bore 12 is 8, 52 mm in the embodiment illustrated in FIG.
Durch die in Figur 2 dargestellte Verschneidungsge- ometrie können im Bereich der Bohrungsverschneidung Sicherheiten erreicht werden, die größer als zwei sind. Dadurch wird das Bauteil in diesem Bereich unkritisch. Erst etwas weiter weg vom Verschnei- dungsbereich und damit weg vom Bereich der Druck- Spannungen treten relevante Spannungen auf, die allerdings mit Sicherheiten um 1,5 oder größer ebenfalls im zulässigen Bereich liegen.By means of the intersecting geometry shown in FIG. 2, in the area of the bore intersection, it is possible to achieve collateral which is greater than two. This makes the component uncritical in this area. Only a little further away from the range of intersection and thus away from the area of the compressive stresses are relevant stresses which, however, are also within the permissible range with safety factors of 1.5 or more.
In Figur 3 ist ein Injektorgehäuse 21 mit einer Hochdruckbohrung 22, die auch als Hochdruckkammer bezeichnet wird, im Querschnitt dargestellt. Die Hochdruckbohrung 22 umfasst einen Hochdruckbohrungsabschnitt 23, dessen Querschnitt in einem Ver- schneidungsbereich 25, in dem eine Hochdruckbohrung 26, die auch als Hochdruckkanal bezeichnet wird, in den Hochdruckbohrungsabschnitt 23 mündet, erfindungsgemäß verändert ist. Durch Bemaßungspfeile 28 und 29 ist die erfindungsgemäße Verschneidungsgeo- metrie bezeichnet. Durch weitere Bemaßungspfeile 31, 32 ist die ursprüngliche zylindrische Geometrie bezeichnet. Durch weitere Bemaßungspfeile 34, 35 sind zwei gegenüberliegende ebene Bereiche bezeichnet. In einem der ebenen Bereiche mündet die Hoch- druckbohrung 26 in den Hochdruckbohrungsabschnitt 23. Der zweite ebene Bereich ist genau gegenüber dem Mündungsbereich der Hochdruckbohrung 26 angeordnet .In FIG. 3, an injector housing 21 with a high-pressure bore 22, which is also referred to as a high-pressure chamber, is shown in cross-section. The high-pressure bore 22 comprises a high-pressure bore section 23 whose cross-section is changed according to the invention in a cutting region 25 in which a high-pressure bore 26, which is also referred to as a high-pressure passage, opens into the high-pressure bore section 23. Dimensioning arrows 28 and 29 denote the intersection geometry according to the invention. By further dimension arrows 31, 32 is designated the original cylindrical geometry. By further dimensioning arrows 34, 35 two opposite planar areas are designated. In one of the planar regions, the high-pressure bore 26 opens into the high-pressure bore section 23. The second planar region is arranged exactly opposite the mouth region of the high-pressure bore 26.
In Figur 4 ist ein ähnliches Injektorgehäuse 21 wie in Figur 3 im Querschnitt dargestellt. Im Unterschied zu dem vorangegangenen Ausführungsbeispiel ist bei dem in Figur 4 dargestellten Ausführungsbeispiel eine Hochdruckbohrung 36, die auch als Zu- laufbohrung oder Hochdruckkanal bezeichnet wird, schräg zugeführt, was zu kleineren Spannungen an der Innenwand der Zulaufbohrung führt. Neben einem geänderten Seitenwinkel, wie es in Figur 4 dargestellt ist, kann die Hochdruckbohrung 36 zusätzlich oder alternativ mit einem Höhenwinkel zugeführt werden, der von 90 Grad abweicht.FIG. 4 shows a similar injector housing 21 as in FIG. 3 in cross-section. In contrast to the preceding exemplary embodiment, in the exemplary embodiment illustrated in FIG. 4, a high-pressure bore 36, which is also referred to as a supply bore or high-pressure passage, is fed obliquely, which leads to smaller stresses on the inner wall of the inlet bore. In addition to a changed side angle, as shown in Figure 4, the high-pressure bore 36 may be additionally or alternatively supplied with an elevation angle which deviates from 90 degrees.
In Figur 5 ist ein Injektorgehäuse 41 mit einer Hochdruckbohrung oder Hochdruckkammer 42 im Quer- schnitt dargestellt. Die Hochdruckbohrung 42 um- fasst einen Hochdruckbohrungsabschnitt 43, der im Wesentlichen die Gestalt eines Kreiszylindermantels aufweist. In einem Verschneidungsbereich 45 mündet eine quer verlaufende Hochdruckbohrung 46, die auch als Hochdruckkanal bezeichnet wird, in den Hochdruckbohrungsabschnitt 43. An zwei Materialwegnahmestellen 51, 52 ist die ursprüngliche kreiszylin- dermantelförmige Gestalt des Hochdruckbohrungsabschnitts 43 so verändert, dass drei ebene Bereiche 61, 62 und 63 geschaffen werden. Die beiden ebenen Bereiche 61 und 62 erstrecken sich parallel zu der Hochdruckbohrung 46 und gehen tangential in den Hochdruckbohrungsabschnitt 43 über.FIG. 5 shows an injector housing 41 with a high-pressure bore or high-pressure chamber 42 in cross-section. The high-pressure bore 42 comprises a high-pressure bore section 43, which essentially has the shape of a circular cylinder jacket. In a Verschneidungsbereich 45 opens a transverse high-pressure bore 46, which is also referred to as a high-pressure channel, in the high-pressure bore portion 43. At two material removal points 51, 52, the original kreiszylin- derummantelförmige shape of the high-pressure bore portion 43 is changed so that three flat areas 61, 62 and 63 are created. The two planar regions 61 and 62 extend parallel to the high-pressure bore 46 and pass tangentially into the high-pressure bore section 43.
Der ebene Bereich 63 erstreckt sich zwischen zwei Bemaßungspfeilen 64 und 65 senkrecht zu der Hochdruckbohrung 46, die innerhalb des ebenen Bereichs 63 in den Hochdruckbohrungsabschnitt 43 mündet. Die drei ebenen Bereiche 61 bis 63 bilden in dem Ver- schneidungsbereich 45 einen im Wesentlichen U- förmigen Querschnitt. Dabei stellt der ebene Bereich 63 die Basis des U-förmigen Querschnitts dar. Die beiden ebenen Bereiche 61 und 62 bilden die Schenkel des U-förmigen Querschnitts, wobei die Ü- bergangsbereiche zwischen den ebenen Bereichen 61, 62 und dem ebenen Bereich 63 verrundet sind. The planar region 63 extends between two dimensioning arrows 64 and 65 perpendicular to the high-pressure bore 46, which opens into the high-pressure bore section 43 within the planar region 63. The three planar regions 61 to 63 form a substantially U-shaped cross section in the intersecting region 45. In this case, the flat portion 63 is the base of the U-shaped cross section. The two planar portions 61 and 62 form the legs of the U-shaped cross section, wherein the Ü- transition areas between the flat portions 61, 62 and the flat portion 63 are rounded ,

Claims

Patentansprüche claims
1. Verschneidungsbereich zwischen einer Hochdruckkammer (2; 12, 13;22,23;42, 43) und einem Hochdruckkanal (6; 16;26; 36; 46) , dadurch gekennzeichnet, dass der Verschneidungsbereich (25; 45) mindestens einen ebenen Bereich (19; 34, 35; 63-65) oder einen Bereich umfasst, der deutlich schwächer gekrümmt als der übrige Verschneidungsbereich ist.1. intersection between a high pressure chamber (2; 12,13; 22,23; 42,43) and a high pressure passage (6; 16; 26; 36; 46), characterized in that the intersection region (25; 45) is at least one plane Range (19; 34, 35; 63-65) or a region which is significantly less curved than the rest of the intersection region.
2. Verschneidungsbereich nach Anspruch 1, dadurch gekennzeichnet, dass der Hochdruckkanal (16; 26; 36; 46) einen kleineren Durchmesser als die Hochdruckkammer (13; 23; 43) aufweist.2. Intersection region according to claim 1, characterized in that the high-pressure channel (16; 26; 36; 46) has a smaller diameter than the high-pressure chamber (13; 23; 43).
3. Verschneidungsbereich nach Anspruch 2, dadurch gekennzeichnet, dass eine Zylindermantelfläche der Hochdruckkammer (13; 23; 43) im Verschneidungsbereich den ebenen Bereich (19; 34, 35; 63-65) oder den Bereich aufweist, der deutlich schwächer als der üb- rige Verschneidungsbereich gekrümmt ist.3. Intersection region according to claim 2, characterized in that a cylinder jacket surface of the high-pressure chamber (13; 23; 43) in the intersecting region has the flat region (19; 34,35; 63-65) or the region which is significantly weaker than the conventional one. curved intersection region is curved.
4. Verschneidungsbereich nach Anspruch 3, dadurch gekennzeichnet, dass der Hochdruckkanal (16; 26; 36; 46) in dem ebenen Bereich (19; 34, 35; 63-65) in die Hochdruckkammer (13; 23; 43) mündet.4. Intersection region according to claim 3, characterized in that the high-pressure channel (16; 26; 36; 46) opens into the high-pressure chamber (13; 23; 43) in the flat region (19; 34,35; 63-65).
5. Verschneidungsbereich nach einem der Ansprüche 2 bis 4, dadurch gekennzeichnet, dass der Übergangs- bereich zwischen dem ebenen Bereich (19; 34, 35; 61- 62) und der Hochdruckkammer (13; 23; 43) verrundet ist .5. Intersection area according to one of claims 2 to 4, characterized in that the transition area between the flat area (19; 34, 35; 62) and the high pressure chamber (13; 23; 43) is rounded.
6. Verschneidungsbereich nach einem der Ansprüche 2 bis 5, dadurch gekennzeichnet, dass der Übergangs- bereich zwischen dem ebenen Bereich (19; 34, 35; 63) und dem Hochdruckkanal (16; 26; 36; 46) verrundet ist.6. intersection region according to one of claims 2 to 5, characterized in that the transition region between the flat region (19; 34, 35, 63) and the high-pressure channel (16; 26; 36; 46) is rounded.
7. Verschneidungsbereich nach einem der Ansprüche 2 bis 6, dadurch gekennzeichnet, dass sich der ebene7. intersection region according to one of claims 2 to 6, characterized in that the plane
Bereich (19; 34, 35, 63-65) parallel zur Längsachse der Hochdruckkammer (13; 23; 43) erstreckt.Area (19; 34, 35, 63-65) parallel to the longitudinal axis of the high-pressure chamber (13; 23, 43) extends.
8. Verschneidungsbereich nach einem der Ansprüche 2 bis 7, dadurch gekennzeichnet, dass die Hochdruckkammer (13), im Querschnitt betrachtet, zwei Kreisbögen aufweist, die an einem Ende in den ebenen Bereich (19) übergehen.8. intersection region according to one of claims 2 to 7, characterized in that the high pressure chamber (13), viewed in cross section, has two circular arcs, which merge at one end in the flat region (19).
9. Verschneidungsbereich nach einem der Ansprüche 2 bis 7, dadurch gekennzeichnet, dass die Hochdruckkammer (23) , im Querschnitt betrachtet, zwei El- lipsenbögen aufweist, die an einem Ende in den ebenen Bereich (34,35) übergehen.9. intersection region according to one of claims 2 to 7, characterized in that the high-pressure chamber (23), viewed in cross-section, has two elliptical elbows, which merge at one end in the planar region (34,35).
10. Verschneidungsbereich nach einem der Ansprüche 2 bis 7, dadurch gekennzeichnet, dass die Hochdruckkammer (43) , im Querschnitt betrachtet, zwei weitere ebene Bereiche (61,62) aufweist, die senk- recht zu dem ebenen Bereich (63) angeordnet sind, von dem sie ausgehen und in die Zylindermantelfläche übergeben. 10. intersection region according to one of claims 2 to 7, characterized in that the high pressure chamber (43), viewed in cross section, two further planar portions (61,62) which are arranged perpendicular to the planar region (63), from which they go out and handed over to the cylinder surface.
EP08735899A 2007-04-19 2008-04-07 Area of intersection between a high-pressure chamber and a high-pressure duct Not-in-force EP2147208B1 (en)

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Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2392816B1 (en) * 2010-06-03 2013-10-09 Delphi Technologies Holding S.à.r.l. Stress Relief in Pressurized Fluid Flow System
DE102013225387A1 (en) 2013-12-10 2015-06-11 Robert Bosch Gmbh Connecting portion between a high pressure passage and a high pressure chamber and fuel injection component with a connection portion
DE102014212194A1 (en) * 2014-06-25 2015-12-31 Robert Bosch Gmbh Method for reducing the voltage at an intersection of two merging channels
DE102019216166A1 (en) * 2019-10-21 2021-04-22 Robert Bosch Gmbh Internal pressure-loaded component, especially for fuel injection in an internal combustion engine

Family Cites Families (37)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63185987U (en) * 1987-05-23 1988-11-29
JPH0752373Y2 (en) * 1989-04-15 1995-11-29 臼井国際産業株式会社 Fuel delivery pipe
JPH0754616Y2 (en) * 1989-05-06 1995-12-18 臼井国際産業株式会社 Fuel delivery pipe
DE3919231C2 (en) * 1989-06-13 1997-03-06 Bosch Gmbh Robert Fuel injection device for internal combustion engines
DE19607521C1 (en) * 1996-02-28 1997-04-10 Juergen Dipl Ing Guido High-pressure fuel pipe, for diesel engine with common-rail system
CA2230742A1 (en) * 1997-03-03 1998-09-03 Usui Kokusai Sangyo Kaisha Limited Common rail and method of manufacturing the same.
CA2230744A1 (en) * 1997-03-03 1998-09-03 Usui Kokusai Sangyo Kaisha Limited Common rail and method of manufacturing the same
US6126208A (en) * 1997-03-03 2000-10-03 Usui Kokusai Sangyo Kaisha Limited Common rail and method of manufacturing the same
FR2765919B1 (en) * 1997-07-09 1999-10-01 Cideb FUEL DISTRIBUTION DEVICE FOR SUPPLYING THE CYLINDERS OF AN INTERNAL COMBUSTION ENGINE
US6263862B1 (en) * 1998-03-02 2001-07-24 Usui Kokusai Sangyo Kaisha Limited Common rail and method of manufacturing the same
FR2778950B1 (en) * 1998-05-19 2000-08-11 Cideb FUEL DISTRIBUTION DEVICE FOR INTERNAL COMBUSTION ENGINE
US6082333A (en) * 1999-01-06 2000-07-04 Siemens Automotive Corporation Rotation limiting connections between cross-over tubes and fuel rails for internal combustion engines
DE19927145A1 (en) * 1999-06-15 2000-12-28 Bosch Gmbh Robert High pressure connection for a fuel injection system for internal combustion engines
DE19933254A1 (en) * 1999-07-15 2001-01-25 Bosch Gmbh Robert Connection piece and housing, in particular high-pressure fuel accumulator, with prestressed welded connection piece for a fuel injection system for internal combustion engines
DE19948338A1 (en) * 1999-10-07 2001-04-12 Bosch Gmbh Robert Process for processing a high-pressure fuel accumulator, high-pressure fuel accumulator and connecting piece for using the method
DE19949962A1 (en) 1999-10-16 2001-04-26 Bosch Gmbh Robert Fuel high pressure storage for a common-rail fuel injection system of IC engine with hollow basic body which is equipped with several connection openings
DE19949963A1 (en) 1999-10-16 2001-04-26 Bosch Gmbh Robert Production of fuel high pressure storage for common-rail fuel injection system of IC engine, which is equipped with hollow basic body having several connection openings
DE10012961A1 (en) 2000-03-16 2001-09-20 Bosch Gmbh Robert High pressure part for fuel injection system; has intersecting bores, where at least one bore has flat part and part has internal pressure stresses in area of flat part
JP2001295723A (en) * 2000-04-13 2001-10-26 Denso Corp Pressure accumulation type fuel injection device
US6604510B2 (en) * 2000-10-04 2003-08-12 Siemens Automotive Corporation Fuel system including a fuel injector directly mounted to a fuel rail
DE10056405B4 (en) 2000-11-14 2005-06-16 Robert Bosch Gmbh High-pressure fuel accumulator for a fuel injection system for internal combustion engines
DE10140058A1 (en) 2001-08-16 2002-10-24 Bosch Gmbh Robert High pressure fuel storage-container has basic body with lengthwise and transverse hollow cavities, connecting support, and inner storage chamber
DE10143519A1 (en) * 2001-09-05 2003-03-27 Siemens Ag High pressure fuel reservoir, for e.g. common rail fuel injection system, has main body with lengthy recess and internal ridge penetrated by bores
DE10146743A1 (en) 2001-09-22 2003-04-17 Bosch Gmbh Robert Injection valve for an internal combustion engine
DE10152230A1 (en) * 2001-10-20 2003-04-30 Bosch Gmbh Robert High pressure resistant injector body
DE10154645A1 (en) * 2001-11-07 2003-06-12 Siemens Ag Method for producing a fuel storage line with a prestressed connector
US6789528B2 (en) * 2002-04-05 2004-09-14 Denso Corporation High pressure fuel supply device having plating layer and manufacturing method thereof
DE10234909A1 (en) * 2002-07-31 2004-02-19 Robert Bosch Gmbh Fuel injector for self-ignition internal combustion engine has inflow boring sector running through connection region of connector
JP2004092551A (en) 2002-09-02 2004-03-25 Usui Kokusai Sangyo Kaisha Ltd Diesel common rail for engine
JP4032383B2 (en) * 2002-09-25 2008-01-16 臼井国際産業株式会社 FUEL RAIL, FUEL RAIL MAIN TUBE AND METHOD FOR PRODUCING THE SAME
EP1413744B1 (en) 2002-10-23 2005-12-28 Wärtsilä Schweiz AG Pressure storage for a common-rail system
JP4498693B2 (en) * 2003-06-20 2010-07-07 臼井国際産業株式会社 High pressure fuel injection pipe
US7021291B2 (en) * 2003-12-24 2006-04-04 Cummins Inc. Juncture for a high pressure fuel system
JP2006233964A (en) * 2005-01-28 2006-09-07 Usui Kokusai Sangyo Kaisha Ltd Common rail for diesel engine
US7900603B2 (en) * 2005-08-04 2011-03-08 Nippon Steel Corporation Automobile-use high pressure fuel injection accumulator-distributor and method of production of the same
JP4484227B2 (en) * 2006-10-02 2010-06-16 ボッシュ株式会社 Common rail
US7699041B2 (en) * 2007-12-11 2010-04-20 Delphi Technologies, Inc. Fuel distribution tube for direct injection fuel rail assemblies

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2008128881A1 *

Also Published As

Publication number Publication date
US8245696B2 (en) 2012-08-21
US20100116251A1 (en) 2010-05-13
EP2147208B1 (en) 2012-02-22
WO2008128881A1 (en) 2008-10-30
DE102007018471A1 (en) 2008-10-23
ATE546637T1 (en) 2012-03-15

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