EP2466110A1 - Fluid fitting arrangement and fluid system - Google Patents

Fluid fitting arrangement and fluid system Download PDF

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Publication number
EP2466110A1
EP2466110A1 EP10195077A EP10195077A EP2466110A1 EP 2466110 A1 EP2466110 A1 EP 2466110A1 EP 10195077 A EP10195077 A EP 10195077A EP 10195077 A EP10195077 A EP 10195077A EP 2466110 A1 EP2466110 A1 EP 2466110A1
Authority
EP
European Patent Office
Prior art keywords
fluid
threaded sleeve
coupling
fluid system
tube element
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
EP10195077A
Other languages
German (de)
French (fr)
Other versions
EP2466110B1 (en
Inventor
Roberto Ricci
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.)
Aumovio Germany GmbH
Original Assignee
Continental Automotive Technologies 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 Continental Automotive Technologies GmbH filed Critical Continental Automotive Technologies GmbH
Priority to EP20100195077 priority Critical patent/EP2466110B1/en
Publication of EP2466110A1 publication Critical patent/EP2466110A1/en
Application granted granted Critical
Publication of EP2466110B1 publication Critical patent/EP2466110B1/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
    • 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
    • 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
    • F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
    • F02M59/44—Details, components parts, or accessories not provided for in, or of interest apart from, the apparatus of groups F02M59/02 - F02M59/42; Pumps having transducers, e.g. to measure displacement of pump rack or piston
    • F02M59/445—Selection of particular materials
    • 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

Definitions

  • the invention relates to a fluid fitting arrangement. Furthermore, the invention relates to a fluid system comprising such fluid fitting arrangement.
  • fittings are known that are welded, for example, on high-pressure fuel pumps. These fittings conventionally provide a hydraulic as well as a mechanical connection in one single element. Particularly with regard to the outlet connections of the high-pressure fuel pumps, these conventional fittings are subjected to fatigue stresses due to pressure pulsations of the fluid.
  • the fluid fitting arrangement comprises a first part of a fluid system.
  • the fluid fitting arrangement further comprises a coupling arrangement.
  • the coupling arrangement comprises a tube element for hydraulically coupling the first part of the fluid system with a second part of the fluid system.
  • the tube element is hydraulically coupled with the first part of the fluid system. Furthermore, the tube element is hydraulically coupleable with the second part of the fluid system.
  • the coupling arrangement further comprises a threaded sleeve for mechanically coupling the first part of the fluid system with the second part of the fluid system.
  • the threaded sleeve is mechanically coupled with the first part of the fluid system.
  • the threaded sleeve is further mechanically coupleable with the second part of the fluid system.
  • the coupling arrangement comprises two elements for providing the hydraulic and the mechanical coupling to the first part of the fluid system. Therefore, the threaded sleeve that provides the mechanical coupling is not subject to direct pressure pulsations since the fluid under pressure is guided only in the tube element during operation. Therefore, the coupling between the threaded sleeve and the first part of the fluid system, for example a high-pressure pump, is reliable and durable. Particularly, a tension force in direction away from the first part is only affected to the threaded sleeve. The tension force is not affected to the tube element. The tension force is for example affected due to the pressure pulsation of the fluid during operation.
  • the tube element and the threaded sleeve are provided as separate parts.
  • the threaded sleeve surrounds the tube element coaxially and the threaded sleeve is radially disposed at a distance from the tube element according to further embodiments.
  • the coupling of the coupling arrangement with the first part of the fluid system is particularly reliable, since the tube element primarily serves for the hydraulic coupling and the threaded sleeve primarily serves for the mechanical coupling. On the other hand, that means that the tube element primarily serves not for a mechanical coupling of the first part with the second part and the threaded sleeve primarily serves not for a hydraulic coupling of the first part with the second part.
  • the first part of the fluid fitting arrangement is a pump for the delivery of the fluid, for example a high-pressure pump for the delivery of fuel in a vehicle.
  • the coupling arrangement provides a reliable fluid supply to the high-pressure pump.
  • the coupling arrangement provides a reliable fluid supply on the outlet of the pump.
  • the fluid system comprises such a fluid fitting arrangement.
  • the fluid system further comprises the second part that is coupled to the coupling arrangement.
  • a coupling between the first and the second part of the fluid system is provided in which the hydraulic coupling and the mechanical coupling are separate from each other. Therefore, the coupling is reliable.
  • a tension force by the second part in direction away from the first part is only affected to the threaded sleeve.
  • the tension force is not affected to the tube element.
  • the tension force is for example affected due to the pressure pulsation of the fluid during operation.
  • the figure schematically shows a fluid fitting arrangement according to an embodiment.
  • the fluid fitting arrangement 100 comprises a first part 101 of a fluid system.
  • the first part 101 is part of a high-pressure pump for the delivery of the fluid.
  • the first part 101 is a housing of the pump.
  • the fluid fitting arrangement 100 further comprises a coupling arrangement 110.
  • the coupling arrangement 110 is coupled with the first part 101, for example with the housing of the pump 101.
  • the coupling arrangement comprises a tube element 111 and a threaded sleeve 112.
  • the threaded sleeve 112 comprises a hollow cylindrical form such that the threaded sleeve 112 surrounds the tube element 111 radially.
  • the threaded sleeve 112 surrounds the tube element 111 such that a distance 113 is disposed between the tube element 111 and the threaded sleeve 112 along the longitudinal extension of the threaded sleeve 112 and the tube element 111.
  • the threaded sleeve 112 comprises a thread 114 which provides a mechanical coupling interface for a second part 120 of the fluid system.
  • the tube element 111 and the threaded sleeve 112 of the coupling arrangement 110 are provided as separate parts.
  • the tube element 101 is hydraulically coupled with the pump 101. Further, the tube element 111 is coupled with the pump 101 via a welded connection 103. A first end of the tube element 111 is coupled with the pump 101 and the opposite end region of the tube element is hydraulically coupleable.
  • the tube element 111 provides a hydraulic interface to the pump 101 for a hydraulically coupling with the second part of the fluid system.
  • the threaded sleeve 112 of the coupling arrangement 110 is mechanically coupled to the pump 101 via a second welded connection 104.
  • a first end of the threaded sleeve 112 is coupled with the pump 101 and the opposite end region of the threaded sleeve is mechanically coupleable.
  • the threaded sleeve 112 provides a mechanical interface to the pump 101 for a coupling with the second part of the fluid system.
  • Each of the threaded sleeve 112 and the tube element 111 is coupled to the pump 101 by the respective welded connection 103, 104.
  • the welded connections 103 and 104 are separate as well.
  • the threaded sleeve 110 When the coupling arrangement 110 is coupled with the second part 120 of the fluid system during operation, the threaded sleeve 110 provides the mechanical coupling between the pump 101 and the second part 120.
  • the hydraulic coupling to the second part 120 is provided by the tube element 111.
  • the fluid is guided from the pump 101 via the tube element 111 to a tube 121 of the second part 120.
  • the threaded sleeve 111 is free of fluid and does not guide any fluid but secures the second part 120 to the pump 101, for example via a coupling nut 122 that is connected with the thread 114 of the threaded sleeve 112.
  • the nut 122 mechanically couples the second part 120 to the pump 101 via the threaded sleeve 111.
  • the threaded sleeve 121 is mechanically coupled to the pipe 121 that is hydraulically coupled to the tube element 111.
  • the mechanical coupling is particularly independent from the hydraulic coupling.
  • the welded connection 103 that couples the tube element 111 with the pump 101 primarily needs to resist the pressure of the fluid during operation.
  • the welding 104 primarily needs to resist the mechanical connection of the second part 120.
  • the welding 104 does primarily not need to resist the hydraulic pressure of the fluid guided through the coupling arrangement. Therefore, each of the welded connections 103 and 104 is particularly reliable.
  • the tube element 101 provides a hermetically sealed fluid connection from the pump 101 via the outlet valve 102 to the tube 121. Since the hermetic fluid connection is provided by the tube element 111, the welded connection 104 of the threaded sleeve 112 must not be a hermetic welding.
  • the coupling arrangement is part of an outlet valve 102 of the pump 101.
  • the outlet valve 102 is arranged in a cavity of the housing of the pump 101 and provides an outlet of the delivered fluid under high pressure.
  • the coupling between the tube element 111 and the housing of the pump 101 is provided by a threaded connection between the tube element and the pump.
  • the coupling is provided by press fitting or by clamping.
  • the tube element is an integrated part of the housing of the pump 101.
  • the coupling between the threaded sleeve 112 and the housing of the pump 101 is provided by a threaded connection between the threaded sleeve and the pump.
  • the coupling is provided by press fitting or by clamping.
  • the threaded sleeve 112 is an integrated part of the housing of the pump 101.

Landscapes

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

Abstract

A fluid fitting arrangement (100) comprises a first part (101) of a fluid system and a coupling arrangement (110). The coupling arrangement comprises a tube element (111) for hydraulically coupling the first part (101) of the fluid system with a second part (120) of the fluid system, the tube element (111) being hydraulically coupled with the first part (101) of the fluid system and being hydraulically coupleable with the second part (120) of the fluid system. The coupling arrangement further comprises a threaded sleeve (112) for mechanically coupling the first part (101) of the fluid system with the second part (120) of the fluid system, the threaded sleeve (112) being mechanically coupled with the first part (101) of the fluid system and being mechanically coupleable with the second part (120) of the fluid system.

Description

  • The invention relates to a fluid fitting arrangement. Furthermore, the invention relates to a fluid system comprising such fluid fitting arrangement.
  • With respect to fuel systems in vehicles, fittings are known that are welded, for example, on high-pressure fuel pumps. These fittings conventionally provide a hydraulic as well as a mechanical connection in one single element. Particularly with regard to the outlet connections of the high-pressure fuel pumps, these conventional fittings are subjected to fatigue stresses due to pressure pulsations of the fluid.
  • It is desirable to create a fluid fitting arrangement which is reliable. Furthermore, it is desirable to create a fluid system which works reliably.
  • According to one embodiment of the invention, the fluid fitting arrangement comprises a first part of a fluid system. The fluid fitting arrangement further comprises a coupling arrangement.
  • The coupling arrangement comprises a tube element for hydraulically coupling the first part of the fluid system with a second part of the fluid system. The tube element is hydraulically coupled with the first part of the fluid system. Furthermore, the tube element is hydraulically coupleable with the second part of the fluid system.
  • The coupling arrangement further comprises a threaded sleeve for mechanically coupling the first part of the fluid system with the second part of the fluid system. The threaded sleeve is mechanically coupled with the first part of the fluid system. The threaded sleeve is further mechanically coupleable with the second part of the fluid system.
  • The coupling arrangement comprises two elements for providing the hydraulic and the mechanical coupling to the first part of the fluid system. Therefore, the threaded sleeve that provides the mechanical coupling is not subject to direct pressure pulsations since the fluid under pressure is guided only in the tube element during operation. Therefore, the coupling between the threaded sleeve and the first part of the fluid system, for example a high-pressure pump, is reliable and durable. Particularly, a tension force in direction away from the first part is only affected to the threaded sleeve. The tension force is not affected to the tube element. The tension force is for example affected due to the pressure pulsation of the fluid during operation.
  • According to a further aspect, the tube element and the threaded sleeve are provided as separate parts. The threaded sleeve surrounds the tube element coaxially and the threaded sleeve is radially disposed at a distance from the tube element according to further embodiments.
  • Due to the separation of the tube element and the threaded sleeve the coupling of the coupling arrangement with the first part of the fluid system is particularly reliable, since the tube element primarily serves for the hydraulic coupling and the threaded sleeve primarily serves for the mechanical coupling. On the other hand, that means that the tube element primarily serves not for a mechanical coupling of the first part with the second part and the threaded sleeve primarily serves not for a hydraulic coupling of the first part with the second part.
  • According to further embodiments, the first part of the fluid fitting arrangement is a pump for the delivery of the fluid, for example a high-pressure pump for the delivery of fuel in a vehicle. The coupling arrangement provides a reliable fluid supply to the high-pressure pump. In particular, the coupling arrangement provides a reliable fluid supply on the outlet of the pump.
  • According to an embodiment, the fluid system comprises such a fluid fitting arrangement. The fluid system further comprises the second part that is coupled to the coupling arrangement.
  • That way, a coupling between the first and the second part of the fluid system is provided in which the hydraulic coupling and the mechanical coupling are separate from each other. Therefore, the coupling is reliable. Particularly, a tension force by the second part in direction away from the first part is only affected to the threaded sleeve. The tension force is not affected to the tube element. The tension force is for example affected due to the pressure pulsation of the fluid during operation.
  • Reference will now be made in detail to the preferred embodiments, examples of which are illustrated in the accompanying drawing.
  • The figure schematically shows a fluid fitting arrangement according to an embodiment.
  • The figure schematically shows a fluid fitting arrangement 100. The fluid fitting arrangement 100 comprises a first part 101 of a fluid system. In the exemplary embodiment, the first part 101 is part of a high-pressure pump for the delivery of the fluid. For example, the first part 101 is a housing of the pump.
  • The fluid fitting arrangement 100 further comprises a coupling arrangement 110. The coupling arrangement 110 is coupled with the first part 101, for example with the housing of the pump 101.
  • The coupling arrangement comprises a tube element 111 and a threaded sleeve 112. The threaded sleeve 112 comprises a hollow cylindrical form such that the threaded sleeve 112 surrounds the tube element 111 radially. The threaded sleeve 112 surrounds the tube element 111 such that a distance 113 is disposed between the tube element 111 and the threaded sleeve 112 along the longitudinal extension of the threaded sleeve 112 and the tube element 111. Furthermore, the threaded sleeve 112 comprises a thread 114 which provides a mechanical coupling interface for a second part 120 of the fluid system.
  • The tube element 111 and the threaded sleeve 112 of the coupling arrangement 110 are provided as separate parts. The tube element 101 is hydraulically coupled with the pump 101. Further, the tube element 111 is coupled with the pump 101 via a welded connection 103. A first end of the tube element 111 is coupled with the pump 101 and the opposite end region of the tube element is hydraulically coupleable. The tube element 111 provides a hydraulic interface to the pump 101 for a hydraulically coupling with the second part of the fluid system.
  • The threaded sleeve 112 of the coupling arrangement 110 is mechanically coupled to the pump 101 via a second welded connection 104. A first end of the threaded sleeve 112 is coupled with the pump 101 and the opposite end region of the threaded sleeve is mechanically coupleable. The threaded sleeve 112 provides a mechanical interface to the pump 101 for a coupling with the second part of the fluid system.
  • Each of the threaded sleeve 112 and the tube element 111 is coupled to the pump 101 by the respective welded connection 103, 104. The welded connections 103 and 104 are separate as well.
  • When the coupling arrangement 110 is coupled with the second part 120 of the fluid system during operation, the threaded sleeve 110 provides the mechanical coupling between the pump 101 and the second part 120. The hydraulic coupling to the second part 120 is provided by the tube element 111. During operation, the fluid is guided from the pump 101 via the tube element 111 to a tube 121 of the second part 120. During operation, the threaded sleeve 111 is free of fluid and does not guide any fluid but secures the second part 120 to the pump 101, for example via a coupling nut 122 that is connected with the thread 114 of the threaded sleeve 112. The nut 122 mechanically couples the second part 120 to the pump 101 via the threaded sleeve 111. The threaded sleeve 121 is mechanically coupled to the pipe 121 that is hydraulically coupled to the tube element 111.
  • Since the mechanical and the hydraulic couplings are divided into two separate couplings, the mechanical coupling is particularly independent from the hydraulic coupling. The welded connection 103 that couples the tube element 111 with the pump 101 primarily needs to resist the pressure of the fluid during operation. The welding 104 primarily needs to resist the mechanical connection of the second part 120. The welding 104 does primarily not need to resist the hydraulic pressure of the fluid guided through the coupling arrangement. Therefore, each of the welded connections 103 and 104 is particularly reliable. Furthermore, the tube element 101 provides a hermetically sealed fluid connection from the pump 101 via the outlet valve 102 to the tube 121. Since the hermetic fluid connection is provided by the tube element 111, the welded connection 104 of the threaded sleeve 112 must not be a hermetic welding.
  • In a preferred embodiment, the coupling arrangement is part of an outlet valve 102 of the pump 101. The outlet valve 102 is arranged in a cavity of the housing of the pump 101 and provides an outlet of the delivered fluid under high pressure.
  • According to further embodiments, the coupling between the tube element 111 and the housing of the pump 101 is provided by a threaded connection between the tube element and the pump. According to further embodiments, the coupling is provided by press fitting or by clamping. According to yet another embodiment, the tube element is an integrated part of the housing of the pump 101.
  • According to further embodiments, the coupling between the threaded sleeve 112 and the housing of the pump 101 is provided by a threaded connection between the threaded sleeve and the pump. According to further embodiments, the coupling is provided by press fitting or by clamping. According to yet another embodiment, the threaded sleeve 112 is an integrated part of the housing of the pump 101.

Claims (12)

  1. Fluid fitting arrangement (100), comprising
    - a first part (101) of a fluid system and
    - a coupling arrangement (110), the coupling arrangement comprising:
    - a tube element (111) for hydraulically coupling the first part (101) of the fluid system with a second part (120) of the fluid system, the tube element being hydraulically coupled with the first part (101) of the fluid system and being hydraulically coupleable with the second part (120) of the fluid system, and
    - a threaded sleeve (112) for mechanically coupling the first part (101) of the fluid system with the second part (120) of the fluid system, the threaded sleeve being mechanically coupled with the first part of the fluid system and being mechanically coupleable with the second part (120) of the fluid system.
  2. Fluid fitting arrangement according to claim 1, wherein the tube element (111) and the threaded sleeve (112) are provided as separate parts.
  3. Fluid fitting arrangement according to claim 1 or 2, wherein the threaded sleeve (112) surrounds the tube element (111) coaxially.
  4. Fluid fitting arrangement according to one of claims 1 to 3, wherein the threaded sleeve (112) is radially disposed at a distance (113) from the tube element (111).
  5. Fluid fitting arrangement according to one of claims 1 to 4, wherein the threaded sleeve (111) comprises an elongated hollow cylindrical form.
  6. Fluid fitting arrangement according to one of claims 1 to 5, wherein the threaded sleeve (112) comprises a thread (114) for mechanically coupling the threaded sleeve (112) with the second part (120) of the fluid system.
  7. Fluid fitting arrangement according to one of claims 1 to 6, wherein the threaded sleeve (112) is free of fluid.
  8. Fluid fitting arrangement according to one of claims 1 to 7, comprising a welded connection (103) to couple the tube element (111) with the first part (101).
  9. Fluid fitting arrangement according to one of claims 1 to 8, comprising a welded connection (104) to couple the threaded sleeve (112) with the first part (101).
  10. Fluid fitting arrangement according to one of claims 1 to 9, wherein the first part (101) is a pump for the delivery of the fluid.
  11. Fluid fitting arrangement according to claim 10, wherein the coupling arrangement (110) is part of an outlet valve (102) of the pump (101).
  12. Fluid system, comprising:
    - a fluid fitting arrangement according to one of claims 1 to 11, and
    - the second part (120), the second part (120) being coupled to the coupling arrangement (110).
EP20100195077 2010-12-15 2010-12-15 Fluid fitting arrangement and fluid system Not-in-force EP2466110B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP20100195077 EP2466110B1 (en) 2010-12-15 2010-12-15 Fluid fitting arrangement and fluid system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP20100195077 EP2466110B1 (en) 2010-12-15 2010-12-15 Fluid fitting arrangement and fluid system

Publications (2)

Publication Number Publication Date
EP2466110A1 true EP2466110A1 (en) 2012-06-20
EP2466110B1 EP2466110B1 (en) 2015-02-25

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Application Number Title Priority Date Filing Date
EP20100195077 Not-in-force EP2466110B1 (en) 2010-12-15 2010-12-15 Fluid fitting arrangement and fluid system

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EP (1) EP2466110B1 (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE882157C (en) * 1950-06-18 1953-07-06 Rudolf Dipl-Ing Schenk Venting device on fuel injection pumps
DE19936535A1 (en) * 1999-08-03 2001-02-15 Bosch Gmbh Robert High pressure fuel accumulator
DE10257953A1 (en) * 2002-12-12 2004-07-01 Robert Bosch Gmbh Injector for common rail system in internal combustion engine, has L- shaped connector body at top with profile connection faces, and welded in place
FR2872252A1 (en) * 2004-06-25 2005-12-30 Senior Automotive Blois Sas So CONNECTING DEVICE

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE882157C (en) * 1950-06-18 1953-07-06 Rudolf Dipl-Ing Schenk Venting device on fuel injection pumps
DE19936535A1 (en) * 1999-08-03 2001-02-15 Bosch Gmbh Robert High pressure fuel accumulator
DE10257953A1 (en) * 2002-12-12 2004-07-01 Robert Bosch Gmbh Injector for common rail system in internal combustion engine, has L- shaped connector body at top with profile connection faces, and welded in place
FR2872252A1 (en) * 2004-06-25 2005-12-30 Senior Automotive Blois Sas So CONNECTING DEVICE

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Publication number Publication date
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