WO2009103593A1 - Injecteur à collage magnétique - Google Patents

Injecteur à collage magnétique Download PDF

Info

Publication number
WO2009103593A1
WO2009103593A1 PCT/EP2009/050845 EP2009050845W WO2009103593A1 WO 2009103593 A1 WO2009103593 A1 WO 2009103593A1 EP 2009050845 W EP2009050845 W EP 2009050845W WO 2009103593 A1 WO2009103593 A1 WO 2009103593A1
Authority
WO
WIPO (PCT)
Prior art keywords
magnet
housing
magnet assembly
adhesive
magnetic
Prior art date
Application number
PCT/EP2009/050845
Other languages
German (de)
English (en)
Inventor
Dieter Roehr
Florian Dirscherl
Thomas Sommer
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 WO2009103593A1 publication Critical patent/WO2009103593A1/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • 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
    • 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
    • F02M47/00—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure
    • F02M47/02—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure of accumulator-injector type, i.e. having fuel pressure of accumulator tending to open, and fuel pressure in other chamber tending to close, injection valves and having means for periodically releasing that closing pressure
    • F02M47/027—Electrically actuated valves draining the chamber to release the closing pressure
    • 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
    • F02M51/00—Fuel-injection apparatus characterised by being operated electrically
    • F02M51/005—Arrangement of electrical wires and connections, e.g. wire harness, sockets, plugs; Arrangement of electronic control circuits in or on fuel injection apparatus
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F7/00—Magnets
    • H01F7/06—Electromagnets; Actuators including electromagnets
    • H01F7/08—Electromagnets; Actuators including electromagnets with armatures
    • H01F7/128—Encapsulating, encasing or sealing
    • 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
    • F02M2200/8038—Fuel injection apparatus manufacture, repair or assembly the assembly involving use of adhesives, glue or the like

Definitions

  • DE 196 50 865 A1 relates to a solenoid valve for controlling the fuel pressure in a control chamber of an injection valve member, such as a common-rail injection system, for the supply of self-igniting internal combustion engines with fuel.
  • a lifting movement of a valve body is controlled with an injection port of the injection valve is opened or closed.
  • the solenoid valve comprises an electromagnet, a movable armature and a valve member moved with the armature and acted upon by a valve closing spring in the closing direction and cooperating with the valve seat of the valve member to control the fuel output from the control chamber.
  • WO 03/038844 A1 relates to a reduced-mass magnet coil carrier. It is proposed a magnet assembly comprising a magnetic coil which is surrounded by a magnet pot. The magnetic coil is electrically conductively connected to contact lugs. A gap between the outside of the magnetic coil and the inside of the magnet pot is formed such that a flowable material is castable in this.
  • the Magnetic coil is surrounded by a thin-walled bobbin on which tubular contact guide elements are formed.
  • the thin-walled coil carrier is made of a mixed with material fillers, temperature-resistant plastic material.
  • DE 197 14 812 A1 relates to a magnetic coil.
  • the magnetic coil is formed by a winding wire which is wound on a winding support.
  • a solenoid coil is used, inter alia, in solenoid valves that are used in fuel pumps of internal combustion engines for controlling the flow rate and the delivery process.
  • the solenoid valves are at least partially flowed around by high-pressure fuel.
  • Solenoid valves with extremely short switching times are required in particular for high-pressure accumulator injection systems (common rail) or pump-nozzle units. The short switching times cause the magnet coil to heat up during operation and therefore to ensure heat dissipation at the magnetic coil, since the thermal load during operation is unfavorable.
  • metal joining partners for example comprising the housing of the solenoid valve and the magnet assembly, magnetic core and magnetic coil
  • adhesive are to be joined by means of adhesive.
  • Such solutions have hitherto been known only from applications without fuel contact, such as from the electric motor production. If media-resistant alternative products are used as adhesives instead of UV-curing adhesives, use in injection valves carrying media such as, for example, fuel is possible.
  • the magnet assembly, magnetic core and magnet coil can be integrated into a one-piece housing.
  • the combination of form-fitting, pressing by crimping, which required a two-part housing concept, can be omitted, and the associated process steps.
  • the savings potential of the solution proposed according to the invention of bonding results by reducing the number of parts and a greater freedom in the selection of materials and minimization of the required process steps.
  • FIG. 1 shows the structure of a previously used magnetic assembly with a two-part housing for actuating a fuel injector
  • Figure 2 is a sectional view of the erf ⁇ ndungshiel proposed solution with cohesively bonded magnet when used on a one-piece housing and
  • Figure 3 is a perspective view of the one-piece housing.
  • FIG. 1 shows a magnet assembly 10 comprising a housing 12.
  • the housing 12 comprises a magnet sleeve 16 and an encapsulation 18.
  • the magnet assembly 10 is constructed symmetrically to an axis 14, apart from the encapsulation 18.
  • an annular groove 20 in which a locking ring 22 of the encapsulation 18 engages.
  • a magnetic core 28 is further accommodated, in which a magnetic coil 26 is located.
  • the magnetic coil 26 is energized viamaschine istspins 32.
  • the contacting pins 32 are guided through passages of a housing part 38, which comprises a discharge nozzle, and can be sealed for example via O-rings or the like in the passages of the housing part 38.
  • FIG. 2 shows a section through the magnet assembly proposed in accordance with the invention, which is fastened in a materially cohesive manner in a one-part housing.
  • the magnet assembly 10 comprises the magnet sleeve 16, which is closed by the encapsulation 18.
  • the encapsulation 18 is provided with a latching ring 22 in an annular groove 20 on the outer circumferential surface of the magnet sleeve 16 positively received.
  • Magnetic core 28, in which magnet coil 26 is embedded, is located in magnet sleeve 16 of magnet assembly 10 as shown in FIG.
  • the magnet coil 26 comprises a multiplicity of winding wires 30, which can be supplied with current via electrical contact elements, which can be designed, for example, as contacting pins 32.
  • the electrical contact elements 32 extend through feedthroughs 34 in the magnet sleeve 16.
  • the feedthroughs 34 are formed in a reduced diameter 60, compare perspective reproduction in FIG.
  • the seal between the electrical contacting elements 32 in the leadthrough 34 of the magnetic sleeve 16 is brought about by a cohesive connection 50.
  • the cohesive connection 50 is represented by a viscous adhesive, for example, which, after being introduced into the gap between the electrical contact elements 32 and the boundary wall of the bushings 34, is cured by a suitable curing process.
  • a viscous adhesive for example
  • media-resistant alternative products that can come into contact with a medium such as, for example, fuel, in particular diesel fuel, can also be used.
  • An adapted process control in the sealing ensures that the gap, including any discontinuities present, such as grooves or dents and the like, is filled free of pores.
  • thermosetting epoxy adhesives can be used.
  • melting adhesives can be used between the electrical contacting elements 32 and the boundary wall of the bushing 34 to simplify the process sequences with a suitable geometric design of the sealing geometry.
  • adhesives which are present in film form, can be used. These are processed by supplying heat and applying a contact pressure.
  • the adhesive from which the cohesive connection 50 between the electrical contacting elements 32 and the boundary wall of the passage 34 is made depends on the properties of the medium, be it water, oil or fuel or the like, as well as the sealing geometry. In this case, play the possible joining direction, the Spaltrynger component tolerances and the like and the requirement of the manufacturing process in terms of timing a prominent role.
  • the sealing effect and the insulating effect of the adhesive on the cohesive connection 50 is based on the adhesive bonding on the cohesive connection of the joining partners, ie the material of the electrical contacts 32 and the material of the Begren- As an alternative to the design of the electrical contact elements as a relatively rigid Kunststofftechnikspins also labile films or cables and the like, which have a reduced dimensional stability in comparison to Mais réellespins used.
  • the adhesive composition on the joining partners necessary.
  • a relaxation of the sealing element, ie the integral connection 50, when using an adhesive is eliminated.
  • the adhesive used in the context of the cohesive connection 50 adapts to the surface of the partner to be joined.
  • this represents a manufacturing advantage and on the other hand this increases the high-pressure resistance of the fuel injector proposed according to the invention since remaining wall thicknesses between the cross-drilled bores within the injector body can be made thicker, resulting in an improvement in the high-pressure strength of the injector body of the fuel injector.
  • Connection 60 to changed pressure conditions. This makes it possible to create the cohesive one Compound 50, which is represented by the adhesive, to use both in the low pressure region and in the high pressure region of a fuel injector.
  • the passage 34 can be adapted to the available clearances and not the injector design can be restricted due to the requirement of the passage 34.
  • the solution proposed according to the invention makes it possible to achieve a reduction in the number of parts, a simplified design of the bushing 34 with regard to its geometry, in particular with regard to a reduced diameter 60, and the surface quality. Furthermore, when using the proposed solution according to the invention, a minimization of the process steps necessary for the assembly can be achieved, which has a favorable effect on the production costs.
  • FIG. 2 furthermore shows that the electrical contact elements 32 designed as contacting pins in this embodiment contact plug tabs 34 of tabs 62.
  • the contact elements formed as electrical contact elements 32 extend substantially parallel to the injector 14.
  • electrical contact elements 32 and formlabile electrical contact elements 32 such as cables or wires, which have a lower stiffness, for contacting the magnetic coil 26, which is embedded within the magnetic core 28, are used.
  • FIG. 2 furthermore shows that the encapsulation 18 is fastened in a form-fitting manner by means of the latching ring 22 in the annular groove 20 of the magnet sleeve 16.
  • FIG. 2 shows that the outside circumference of the magnet core 28, in which the magnet coil 26 is embedded with its multiplicity of winding wires 30, abuts on a contact surface 68 on the inside of the magnet sleeve 16 of the magnet assembly 10.
  • FIGS. 2 and 3 furthermore show that the magnetic core 28 in which the magnetic coil 26 contacted by the contacting pins 32 is located in the insertion direction 78 -in the present case from the underside-in FIG the one-piece housing performing magnetic sleeve 16 is inserted.
  • the magnetic core 28 is formed in a reduced diameter 60.
  • the chosen solution makes it possible to dispense with two-part housing, as shown in FIG. Due to the one-piece design of the housing representing magnetic sleeve 16 form-fitting and pressing, ie the production of a flanging 24 - as in Figure 1 - which makes a two-part design housing concept required omitted.

Abstract

L’invention concerne un module magnétique (10) d’une électrovanne, notamment pour actionner un injecteur de carburant, pourvu d’un boîtier (12, 16) ainsi que d’un noyau magnétique (28) et d’un solénoïde (26) mis en contact par des éléments de contact électriques (32). Le boîtier (16) est conçu d’un seul tenant. Au moins le noyau magnétique (28) y est fixé par liaison de matériaux (76).
PCT/EP2009/050845 2008-02-22 2009-01-26 Injecteur à collage magnétique WO2009103593A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200810010561 DE102008010561A1 (de) 2008-02-22 2008-02-22 Einspritzventil mit Magnetverklebung
DE102008010561.9 2008-02-22

Publications (1)

Publication Number Publication Date
WO2009103593A1 true WO2009103593A1 (fr) 2009-08-27

Family

ID=40592049

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2009/050845 WO2009103593A1 (fr) 2008-02-22 2009-01-26 Injecteur à collage magnétique

Country Status (2)

Country Link
DE (1) DE102008010561A1 (fr)
WO (1) WO2009103593A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2538066A1 (fr) * 2011-06-20 2012-12-26 Delphi Technologies Holding S.à.r.l. Ensemble pour soupape à commande électrique
WO2014102025A1 (fr) * 2012-12-27 2014-07-03 Robert Bosch Gmbh Électrovanne dotée d'un élément d'étanchéité emmanché en force
CN107670181A (zh) * 2017-11-06 2018-02-09 中国科学院近代物理研究所 一种用于Gantry磁体的倾斜螺线管

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013224770A1 (de) 2013-12-03 2015-06-03 Robert Bosch Gmbh Kraftstoffinjektor

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040021016A1 (en) * 2001-07-31 2004-02-05 Wiemken Norval J. Desensitizing armature air gap to component distortion in a fuel injector
WO2007023125A1 (fr) * 2005-08-22 2007-03-01 Robert Bosch Gmbh Procede pour produire un boitier rigide
WO2007128948A1 (fr) * 2006-05-03 2007-11-15 Delphi Technologies, Inc. Procede pour envelopper un actionneur
DE102007012184A1 (de) * 2006-08-02 2008-02-07 Continental Teves Ag & Co. Ohg Elektromagnet
WO2008104424A1 (fr) * 2007-03-01 2008-09-04 Robert Bosch Gmbh Tête magnétique pour électrovanne

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19650865A1 (de) 1996-12-07 1998-06-10 Bosch Gmbh Robert Magnetventil
DE19714812A1 (de) 1997-04-10 1998-10-15 Bosch Gmbh Robert Magnetspule
DE10151955A1 (de) 2001-10-22 2003-05-08 Bosch Gmbh Robert Massereduzierter Magnetspulenträger

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040021016A1 (en) * 2001-07-31 2004-02-05 Wiemken Norval J. Desensitizing armature air gap to component distortion in a fuel injector
WO2007023125A1 (fr) * 2005-08-22 2007-03-01 Robert Bosch Gmbh Procede pour produire un boitier rigide
WO2007128948A1 (fr) * 2006-05-03 2007-11-15 Delphi Technologies, Inc. Procede pour envelopper un actionneur
DE102007012184A1 (de) * 2006-08-02 2008-02-07 Continental Teves Ag & Co. Ohg Elektromagnet
WO2008104424A1 (fr) * 2007-03-01 2008-09-04 Robert Bosch Gmbh Tête magnétique pour électrovanne

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2538066A1 (fr) * 2011-06-20 2012-12-26 Delphi Technologies Holding S.à.r.l. Ensemble pour soupape à commande électrique
WO2012175384A1 (fr) * 2011-06-20 2012-12-27 Delphi Technologies Holding S.A.R.L. Ensemble pour clapet à actionnement électrique
WO2014102025A1 (fr) * 2012-12-27 2014-07-03 Robert Bosch Gmbh Électrovanne dotée d'un élément d'étanchéité emmanché en force
CN107670181A (zh) * 2017-11-06 2018-02-09 中国科学院近代物理研究所 一种用于Gantry磁体的倾斜螺线管
CN107670181B (zh) * 2017-11-06 2019-08-27 中国科学院近代物理研究所 一种用于Gantry磁体的倾斜螺线管

Also Published As

Publication number Publication date
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