EP1760306A1 - Corps de boîte - Google Patents

Corps de boîte Download PDF

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Publication number
EP1760306A1
EP1760306A1 EP20050019334 EP05019334A EP1760306A1 EP 1760306 A1 EP1760306 A1 EP 1760306A1 EP 20050019334 EP20050019334 EP 20050019334 EP 05019334 A EP05019334 A EP 05019334A EP 1760306 A1 EP1760306 A1 EP 1760306A1
Authority
EP
European Patent Office
Prior art keywords
housing body
cavity
actuator
fluid
invar alloy
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Withdrawn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
EP20050019334
Other languages
German (de)
English (en)
Inventor
Maximilian Dr. Kronberger
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.)
Continental Automotive GmbH
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 EP20050019334 priority Critical patent/EP1760306A1/fr
Priority to US11/470,028 priority patent/US20070079675A1/en
Priority to CNA2006101516978A priority patent/CN1928349A/zh
Publication of EP1760306A1 publication Critical patent/EP1760306A1/fr
Withdrawn legal-status Critical Current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
    • F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
    • F02M63/0012—Valves
    • F02M63/0014—Valves characterised by the valve actuating means
    • F02M63/0015—Valves characterised by the valve actuating means electrical, e.g. using solenoid
    • F02M63/0026—Valves characterised by the valve actuating means electrical, e.g. using solenoid using piezoelectric or magnetostrictive actuators
    • 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
    • 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
    • F02M61/166—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
    • 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
    • F02M61/168—Assembling; Disassembling; Manufacturing; Adjusting
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/80—Fuel injection apparatus manufacture, repair or assembly
    • F02M2200/8069—Fuel injection apparatus manufacture, repair or assembly involving removal of material from the fuel apparatus, e.g. by punching, hydro-erosion or mechanical operation
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/04—Processes
    • Y10T83/0405—With preparatory or simultaneous ancillary treatment of work
    • Y10T83/0443—By fluid application

Definitions

  • the invention relates to a housing body made of an Invar alloy, an actuator for an injection valve with a housing body and an injection valve.
  • Invar alloys are a group of alloys and compounds that have the property of having very small positive or sometimes negative thermal expansion coefficients in certain temperature ranges. The name results from the invariance of the strain with respect to a temperature change. Invar has high mechanical strength and can be welded. A commonly used Invar alloy is a FeNi alloy with a nickel content of 36% nickel. By alloying with 5% cobalt, the thermal expansion coefficient can be further reduced. In addition, many other alloys are known in which an Invar effect occurs.
  • Housing body made of an Invar alloy z. B. housing body for an actuator of an injection valve of an internal combustion engine, have the advantage that only takes a small change in temperature of the housing body with a change in temperature. Components which are located inside the housing body, and which themselves are subject to no or only a slight change in length, thus usually have no or only low mechanical stresses relative to the housing body. Since housing bodies are generally intended to combine more and more functions, it is the goal that housing bodies made of Invar alloys in addition to those from the low temperature-dependent Length change resulting functions take on more tasks.
  • the object of the invention is to provide a housing body made of an Invar alloy, an actuator for an injection valve with a housing body and an injection valve, which allow a reliable and precise function, each with a small number of components.
  • the invention is characterized by a housing body made of an Invar alloy, with a recess for receiving a component of a different Invar alloy material having an approximately the same thermal expansion coefficient as the Invar alloy, and a Cavity, which is produced by a cutting process, and the intended use of a fluid can be acted upon by high pressure.
  • the material data of the Invar alloy used for the housing body can be at certain geometrical boundary conditions, for example, depending on a distance between the recess for receiving the component and the cavity and an opening width of the cavity, each determine a maximum pressure with which the cavity durably reliable can be applied.
  • the cavity of the housing body which consists of such an Invar alloy, operated under the same geometric boundary conditions for pressures above the calculated maximum pressure permanently can be. Under high pressure is understood here as the pressure which is above the calculated maximum pressure as described.
  • the reason for increased pressure resistance of the cavity is that in the formation of the cavity by a cutting process wall regions of the housing body, which adjoin the cavity, are plastically deformed, whereby pressure compressive stresses are built up in these wall regions of the housing body. If a fluid with a pressure of significantly more than the calculated maximum pressure acts on the cavity, then the internal compressive stresses in the wall regions of the housing body counteract the pressure forces of the fluid. Thus, the cavity can be pressurized with pressures that can be significantly above the calculated maximum pressure.
  • both the component and the cavity with high pressure resistance can be arranged in a single housing body.
  • multifunctional housing bodies can be lighter in weight because it avoids having to use additional components, for example components for connecting a plurality of housing body parts.
  • the Invar alloy in a temperature range of 25 ° C-100 ° C has a mean thermal expansion coefficient of a maximum of 2 * 10 -6 / K.
  • Invar alloys with such a small thermal expansion coefficient are, for example FeNi alloys with a nickel content of about 36%, which are readily available and therefore often used in the corresponding technical applications.
  • the cavity has a wall and the fluid acts on the cavity at least once for a predetermined period of time at a pressure such that the flow limit of the Invar alloy is exceeded in the region of the wall.
  • a pressure such that the flow limit of the Invar alloy is exceeded in the region of the wall.
  • the strength of the cavity is further increased.
  • wall regions of the cavity are plastically deformed, and after elimination of the pressure action, internal compressive stresses are present in the sections of the housing body adjoining the wall regions of the cavity, which are larger than the compressive residual stresses which are produced solely by the production of the cavity by means of the machining Be built up process.
  • a fluid acts at least once for a predetermined period of time on the cavity at a pressure of at least 2500 bar. At this pressure, exceeding the yield point of Invar alloys can be achieved.
  • the cutting method is drilling, milling, grinding or honing. These methods are particularly easy to apply for the production of the cavity in the housing body.
  • the cavity has a circular cylindrical cross section. This is a particularly easy to manufacture cavity in the form of a cylinder bore.
  • the invention is characterized by an actuator for an injection valve, with a housing body, wherein the cavity for supplying a fluid with a high pressure circuit of a fluid is hydraulically coupled.
  • the housing body of an Invar alloy in which the cavity is arranged with high pressure resistance, further pressure-tightness between the actuator and the actuator adjacent components of the injection valve can be achieved.
  • the Invar alloy for the one-piece housing body is a relatively good plastically deformable material, which is a good match allows the housing body to the actuator adjacent components of the injector.
  • the component is an actuator.
  • the actuator is a piezoelectric actuator.
  • the invention is characterized by an injection valve with a nozzle assembly and an actuator, wherein the nozzle assembly and the actuator are coupled together.
  • the Invar alloy housing body in which the high pressure strength cavity is also disposed, the electric power required for a desired stroke of a nozzle needle of the nozzle assembly can be reduced for the actuator.
  • additional components made of materials with different stiffness and different coefficients of thermal expansion, they would not be able to be so well integrated in the power flow from the actuator to the nozzle needle.
  • the actuator therefore a deformation work for the additional components would have to be done, by which a higher cost of electrical energy would be required for the actuator.
  • Figure 1 shows a cross section through a housing body
  • FIG. 2 shows a longitudinal section through an injection valve with an actuator.
  • FIG. 1 shows a schematic view of a detail of a housing body 18.
  • the housing body 18 is made of an Invar alloy.
  • the housing body 18 has a recess 19 in which a component 16 is arranged.
  • a cavity 24 is arranged at a distance d from the recess 19, a cavity 24 is arranged.
  • the recess 19 is shown here with an octagonal cross-section, but may also assume other arbitrary cross-sectional shapes.
  • the cavity 24 is shown here with a circular cross-section with a diameter D, but may also assume other cross-sectional shapes.
  • FIG. 2 shows an injection valve 10 with an actuator 12 and a nozzle assembly 14.
  • the actuator 12 and the nozzle assembly 14 are coupled together by means of a nozzle retaining nut 17.
  • the actuator 12 which is designed as an actuator component 16 is arranged.
  • the actuator may in particular be designed as a piezo actuator with a stack of piezoelectric elements and change its axial extent depending on an applied electrical voltage.
  • the electrical voltage is applied to the actuator via a connection socket 22.
  • the actuator is coupled to a transmitter unit 26 which is disposed between the actuator 12 and the nozzle assembly 14.
  • the injection valve 10 further comprises a fluid port 20, via which the injection valve 10 is coupled in the mounted state with a high-pressure circuit, not shown, of a fluid.
  • the nozzle assembly 14 comprises a nozzle body 27 with a nozzle body recess 34.
  • a nozzle needle 28 is arranged in the nozzle body recess 34.
  • the nozzle needle 28 is partially guided in the nozzle body recess 34. It is further biased by a nozzle spring 36 so that it prevents fluid flow through an injector 32 arranged in a nozzle tip 30 when no further forces act on the nozzle needle 28.
  • the recess 19 and the cavity 24 is arranged with a wall 25.
  • fluid can flow from the high-pressure circuit via the fluid connection 20 to the nozzle assembly 14.
  • the fluid pressures are 2000 bar and more. Such high pressures place high demands on the material of the housing body 18 as well as on the design of the cavity 24.
  • the housing body 18 consists of an Invar alloy with a nickel content of about 36%.
  • Invar Invar alloy with a nickel content of about 36%.
  • the cavity 24 is introduced by drilling with a circular cylindrical cross-section with the diameter D.
  • the distance d between the recess 19 of the housing body and the cavity 24 in the minimum case only about 1.85 mm.
  • the diameter D of the circular cylindrical cavity 24 is about 2 mm.
  • the material data of the Invar alloy used for the housing body 18 allow the housing body 18 to be permanently pressurized up to a maximum of 2000 bar.
  • the housing body 18 with such an invar alloy under these geometrical boundary conditions can also be operated reliably for pressures of far more than 2000 bar.
  • the housing body 18 of an Invar alloy in which the cavity 24 is arranged, a better pressure tightness between the actuator 12 and the transmitter unit 26 can be achieved. This is due to the fact that in the otherwise usual use of components made of materials with different stiffness and different coefficients of thermal expansion mechanical stresses between the components can occur, resulting in poorer adaptability of the entire actuator 12 can lead to the transmitter unit 26.
  • the Invar alloy for the one-piece housing body 18 is a relatively good plastically deformable material, which allows a good adaptation of the housing body 18 to the transmitter unit 26.
  • the electrical energy required for a desired stroke of the nozzle needle 28 can be reduced for the actuator.
  • additional components made of materials with different stiffness and different coefficients of thermal expansion, they would generally not be able to be so well integrated into the power flow from the actuator 12 to the transmitter unit 26. The actuator would therefore have to perform a deformation work for the additional components, which would require a higher amount of electrical energy for the actuator.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Fuel-Injection Apparatus (AREA)
EP20050019334 2005-09-06 2005-09-06 Corps de boîte Withdrawn EP1760306A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP20050019334 EP1760306A1 (fr) 2005-09-06 2005-09-06 Corps de boîte
US11/470,028 US20070079675A1 (en) 2005-09-06 2006-09-05 Housing body
CNA2006101516978A CN1928349A (zh) 2005-09-06 2006-09-06 壳体

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP20050019334 EP1760306A1 (fr) 2005-09-06 2005-09-06 Corps de boîte

Publications (1)

Publication Number Publication Date
EP1760306A1 true EP1760306A1 (fr) 2007-03-07

Family

ID=35695658

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20050019334 Withdrawn EP1760306A1 (fr) 2005-09-06 2005-09-06 Corps de boîte

Country Status (3)

Country Link
US (1) US20070079675A1 (fr)
EP (1) EP1760306A1 (fr)
CN (1) CN1928349A (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008040625A1 (fr) * 2006-09-29 2008-04-10 Continental Automotive Gmbh Procédé et dispositif pour produire des empilements céramiques à section transversale polygonale
EP2330288A1 (fr) * 2009-11-23 2011-06-08 Robert Bosch GmbH Soupape d'injection de combustible

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8109143B2 (en) * 2008-12-16 2012-02-07 Schlumberger Technology Corporation Packaging for downhole pressure transducers
US11105304B2 (en) * 2018-12-04 2021-08-31 Caterpillar Inc. Fuel injector having residually stressed solenoid housing for improved pressure capapility

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19540155A1 (de) * 1995-10-27 1997-04-30 Huber Motorenbau Inst Servoventil für eine Einspritzdüse
DE10149915A1 (de) * 2001-10-10 2003-04-24 Bosch Gmbh Robert Brennstoffeinspritzventil
DE10149914A1 (de) * 2001-10-10 2003-04-24 Bosch Gmbh Robert Brennstoffeinspritzventil
EP1318292A2 (fr) * 2001-12-10 2003-06-11 Dana Corporation Procédé de fabrication d'une rampe à combustible
DE10260856A1 (de) * 2002-12-23 2004-07-01 Robert Bosch Gmbh Verfahren zur Steigerung einer Dauerfestigkeit eines mit wenigstens einem Hohlraum ausgebildeten metallischen Bauteiles unter zyklischer Innendruckbelastung

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6313568B1 (en) * 1999-12-01 2001-11-06 Cummins Inc. Piezoelectric actuator and valve assembly with thermal expansion compensation
ITBO20040466A1 (it) * 2004-07-23 2004-10-23 Magneti Marelli Holding Spa Iniettore di carburante con attuazione elettromagnetica
ATE352714T1 (de) * 2005-06-17 2007-02-15 Magneti Marelli Powertrain Spa Brennstoffeinspritzventil

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19540155A1 (de) * 1995-10-27 1997-04-30 Huber Motorenbau Inst Servoventil für eine Einspritzdüse
DE10149915A1 (de) * 2001-10-10 2003-04-24 Bosch Gmbh Robert Brennstoffeinspritzventil
DE10149914A1 (de) * 2001-10-10 2003-04-24 Bosch Gmbh Robert Brennstoffeinspritzventil
EP1318292A2 (fr) * 2001-12-10 2003-06-11 Dana Corporation Procédé de fabrication d'une rampe à combustible
DE10260856A1 (de) * 2002-12-23 2004-07-01 Robert Bosch Gmbh Verfahren zur Steigerung einer Dauerfestigkeit eines mit wenigstens einem Hohlraum ausgebildeten metallischen Bauteiles unter zyklischer Innendruckbelastung

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008040625A1 (fr) * 2006-09-29 2008-04-10 Continental Automotive Gmbh Procédé et dispositif pour produire des empilements céramiques à section transversale polygonale
EP2330288A1 (fr) * 2009-11-23 2011-06-08 Robert Bosch GmbH Soupape d'injection de combustible

Also Published As

Publication number Publication date
CN1928349A (zh) 2007-03-14
US20070079675A1 (en) 2007-04-12

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