EP1491758A1 - Verbindungsanordnung - Google Patents

Verbindungsanordnung Download PDF

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Publication number
EP1491758A1
EP1491758A1 EP20030014324 EP03014324A EP1491758A1 EP 1491758 A1 EP1491758 A1 EP 1491758A1 EP 20030014324 EP20030014324 EP 20030014324 EP 03014324 A EP03014324 A EP 03014324A EP 1491758 A1 EP1491758 A1 EP 1491758A1
Authority
EP
European Patent Office
Prior art keywords
component
connecting element
mushroom
head
shaped connecting
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.)
Withdrawn
Application number
EP20030014324
Other languages
English (en)
French (fr)
Inventor
Roberto Ricci
Domenico Viggiani
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.)
Siemens AG
Original Assignee
Siemens AG
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 Siemens AG filed Critical Siemens AG
Priority to EP20030014324 priority Critical patent/EP1491758A1/de
Publication of EP1491758A1 publication Critical patent/EP1491758A1/de
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
    • F02M55/02—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
    • F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
    • F02M55/004—Joints; Sealings
    • F02M55/005—Joints; Sealings for high pressure conduits, e.g. connected to pump outlet or to injector inlet

Definitions

  • the invention relates to a component that is suitable for connecting to a further component, and a connecting arrangement with a first and second component.
  • a component of this kind or a connecting arrangement of this kind is particularly suitable for use in a fuel supply device of an internal combustion engine.
  • an injection valve for an internal combustion engine is known and the arrangement of the injection valve in a fuel feed device of an internal combustion engine.
  • the injection valve has a connecting element that is fitted into a tubular recess of a connection of a fuel rail.
  • the connecting element of the injection valve also has a tubular recess.
  • the injection valve has a sealing ring that is arranged radially around the connecting element.
  • a thread, a mating thread, a ring and a taper are provided that interact with each other in such a way that when the thread is screwed onto the mating thread the ring tensions the taper radially in the direction of the connecting element of the injection valve and thus fixes the connecting valve.
  • the object of the invention is to create a component that on the one hand is simple and on the other hand guarantees a reliable seal at high pressure in the component when connected to another component. It is furthermore the task of the invention to create a connecting arrangement with a first and second component, that on the one hand is simple and on the other hand guarantees a reliable seal between the first and second component with high pressure in the components.
  • the invention is distinguished by a component that is suitable for connecting to another component, with the other component having a tapered recess at whose narrow end a tubular recess of the other component connects.
  • the component has a mushroom-head-shaped connecting element with a further tubular recess.
  • the mushroom-head-shaped connecting element can be pressed against the other component in the area of the tapered recess.
  • the connecting element is provided with a sealing material the hardness of which is less than that of the material of the other component of which the other component consists at least in the area of contact with the connecting element.
  • the sealing material is pressed onto the mushroom-head-shaped connecting element.
  • the sealing material can be simply matched to the mushroom-head shape of the connecting element and durably connected to the connecting element in a simple manner.
  • This advantageous embodiment of the invention in particular enables a ring to be used as the sealing material, said ring being matched to the mushroom-head shape of the connecting element by the press tool and being connected to it. Such rings are cheap and freely available.
  • the sealing material consists of aluminum or copper.
  • the aluminum or copper materials have properties that make them particularly suitable for sealing.
  • the component has a thread that is suitable for screwing into a mating thread that is formed in the other component.
  • the component can be very simply assembled to the other component, with only a slight torque having to be applied when screwing up the thread, and a reliable assembly is thus enabled.
  • a fuel feed device is assigned to an internal combustion engine ( Figure 1).
  • the fuel feed device is designed for use in internal combustion engines with direct metering of the fuel to the cylinders of the internal combustion engine at high pressure, for example 200 bar. It includes a fuel tank 20, that is connected via a first fuel line to a low-pressure pump 21. At the output end, the low-pressure pump 21 is connected to an inlet 23, of a high-pressure pump 24. Furthermore, at the outlet of the low-pressure pump 21, a mechanical regulator 22 is provided, the output of which is actively connected via a further fuel line to the fuel tank 20.
  • the inlet 23 is connected to the high-pressure pump 24 that at its output end pumps fuel to the fuel accumulator 25.
  • the high-pressure pump 24 is usually driven by the crankshaft or camshaft of the internal combustion engine and thus at a constant speed of the crankshaft delivers a constant fuel volume to the fuel accumulator 25.
  • Injection valves 29 are actively connected to the fuel accumulator 25. The fuel is thus fed to the injection valves 29 via the fuel accumulator 25.
  • the injection valves 29 have a sealed connection to the fuel accumulator 25.
  • Figure 2 shows a first component 2 and a second component 9.
  • the first component 2 can, for example, be an injection valve 29.
  • the second component 9 can for example, be part of the fuel accumulator 25.
  • the first component 2 has a mushroom-head-shaped connecting element 3 with a tubular recess 4 that is suitable for the passage of fluid, particularly fuel.
  • the mushroom-head-shaped connecting element 3 is provided with a sealing material 6.
  • the first component 2 has a thread 7 that is suitable for screwing onto a mating thread 12 of the second component 9.
  • the second component 9 also has a tapered recess 10, at whose narrowed end a tubular recess 11 of the second component 9 connects.
  • the tubular recess 11 is advantageously designed so that it forms a connection to a fuel volume in the fuel accumulator 25.
  • Figure 2 shows a connection arrangement of the first component 2 and second component 9.
  • the thread 7 is engaged with the mating thread 12, by which means the mushroom-head-shaped connecting element 3 is pressed against part of the tapered recess 10.
  • the sealing material 6 is located at least in this contact area.
  • the mushroom-head-shaped connecting element 3 is, for example, hemispherical or in the form of a half ellipse. In this way a particularly high surface pressure in the area of the contact of the mushroom-head-shaped connecting element 3 with the second component 9 in the area of the tapered recess 10 is guaranteed, with at the same time only light torque being necessary to screw the thread 7 onto the mating thread. This means that the first component 2 is not overstressed.
  • the sealing material 6 is matched to the mushroom-head shape of the connecting element and has a hardness that is less than the hardness of the second component 9, i.e. of the material of the second component 9 that is present in the area of the tapered recess 10.
  • the material of the second component 9 is preferably steel.
  • the sealing material is preferably copper or aluminum, whose hardness is less than the hardness of the steel of the second component 9.
  • the hardness of a material is normally determined using a Brinell or Mohs hardness test.
  • the sealing material 6 is plastically deformed by the high surface pressure in the area of contact with the tapered recess 10 of the second component 9 and thus in conjunction with the mushroom-head shape of the connecting element ensures an extremely reliable seal at high pressure in the component, i.e. at a high pressure of the fluid flowing through the tubular recess 11 of the second component and then on through the tubular recess 4 of the first component.
  • the sealing material is applied to the mushroom-head-shaped connecting element 3 by pressing.
  • the advantage of this is that a simple, cheaply available standard component, such as a ring, can be used as the sealing material and this can then be adapted to the shape of the mushroom-head-shaped connecting element, and also be permanently connected to it, by means of the press tool and of the mushroom-head-shaped connecting element.
  • the sealing material 6 can also be applied in a different manner, for example by welding, which however has been shown to be more expensive.
  • the sealing material 6 can also consist of a metal other than aluminum or copper provided this metal or material has the properties necessary to form the seal.
  • the thread 7 and mating thread 12 represent a particularly simple means of applying the necessary surface pressure in the area of the seal.
  • the first component 2 can, however, also be pressed against the second component with the aid of external forces and then fixed in this position, for example by crimping.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)
EP20030014324 2003-06-25 2003-06-25 Verbindungsanordnung Withdrawn EP1491758A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP20030014324 EP1491758A1 (de) 2003-06-25 2003-06-25 Verbindungsanordnung

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP20030014324 EP1491758A1 (de) 2003-06-25 2003-06-25 Verbindungsanordnung

Publications (1)

Publication Number Publication Date
EP1491758A1 true EP1491758A1 (de) 2004-12-29

Family

ID=33395871

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20030014324 Withdrawn EP1491758A1 (de) 2003-06-25 2003-06-25 Verbindungsanordnung

Country Status (1)

Country Link
EP (1) EP1491758A1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007005865A1 (de) * 2006-11-30 2008-06-05 Elringklinger Ag Abdichtvorrichtung für einen Kraftstoffleitungsanschluss
DE102007012666A1 (de) * 2007-03-16 2008-09-18 Bayerische Motoren Werke Aktiengesellschaft Hochdruckverschraubung

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4143625A (en) * 1976-11-26 1979-03-13 Robert Bosch Gmbh Injection valve for internal combustion engines
US5169182A (en) * 1990-05-22 1992-12-08 Usui Kokusai Sangyo Kaisha Ltd. Branch connection in a high pressure fuel rail with gasket
US5172939A (en) * 1989-10-14 1992-12-22 Usui Kokusai Sangyo Kaisha Ltd. Connection structure for branch pipe in high-pressure fuel rail

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4143625A (en) * 1976-11-26 1979-03-13 Robert Bosch Gmbh Injection valve for internal combustion engines
US5172939A (en) * 1989-10-14 1992-12-22 Usui Kokusai Sangyo Kaisha Ltd. Connection structure for branch pipe in high-pressure fuel rail
US5169182A (en) * 1990-05-22 1992-12-08 Usui Kokusai Sangyo Kaisha Ltd. Branch connection in a high pressure fuel rail with gasket

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007005865A1 (de) * 2006-11-30 2008-06-05 Elringklinger Ag Abdichtvorrichtung für einen Kraftstoffleitungsanschluss
DE102007012666A1 (de) * 2007-03-16 2008-09-18 Bayerische Motoren Werke Aktiengesellschaft Hochdruckverschraubung

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