WO2004083625A1 - Electro-aimant pour electrovanne - Google Patents

Electro-aimant pour electrovanne Download PDF

Info

Publication number
WO2004083625A1
WO2004083625A1 PCT/DE2003/003577 DE0303577W WO2004083625A1 WO 2004083625 A1 WO2004083625 A1 WO 2004083625A1 DE 0303577 W DE0303577 W DE 0303577W WO 2004083625 A1 WO2004083625 A1 WO 2004083625A1
Authority
WO
WIPO (PCT)
Prior art keywords
coil
electromagnet
coil winding
magnet
pump
Prior art date
Application number
PCT/DE2003/003577
Other languages
German (de)
English (en)
Inventor
Wilfried Ihl
Peter Sprafke
Uwe Schmidt
Hubert Greif
Timo Haegele
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
Priority to JP2004569460A priority Critical patent/JP4511950B2/ja
Priority to EP03782089A priority patent/EP1606510B1/fr
Priority to DE50312487T priority patent/DE50312487D1/de
Publication of WO2004083625A1 publication Critical patent/WO2004083625A1/fr

Links

Classifications

    • 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
    • H01F7/16—Rectilinearly-movable armatures
    • H01F7/1638—Armatures not entering the winding
    • 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
    • F02M57/00—Fuel-injectors combined or associated with other devices
    • F02M57/02—Injectors structurally combined with fuel-injection pumps
    • F02M57/022—Injectors structurally combined with fuel-injection pumps characterised by the pump drive
    • F02M57/023—Injectors structurally combined with fuel-injection pumps characterised by the pump drive mechanical
    • 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
    • F02M61/20—Closing valves mechanically, e.g. arrangements of springs or weights or permanent magnets; Damping of valve lift
    • F02M61/205—Means specially adapted for varying the spring tension or assisting the spring force to close the injection-valve, e.g. with damping of valve lift
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F5/00—Coils
    • H01F5/04—Arrangements of electric connections to coils, e.g. leads
    • 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
    • H01F2007/062—Details of terminals or connectors for electromagnets
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/28—Coils; Windings; Conductive connections
    • H01F27/32—Insulating of coils, windings, or parts thereof
    • H01F27/327—Encapsulating or impregnating
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F5/00—Coils
    • H01F5/06—Insulation of windings
    • 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

Definitions

  • the invention relates to an electromagnet, in particular for a solenoid valve, according to the preamble of claim 1.
  • Such an electromagnet is known from the literature, for example Diesel engine management, Vieweg publishing house, 2nd edition 1998, page 246, picture 14.
  • This electromagnet has a magnet coil with a hollow cylindrical coil winding and a coil carrier connected to it.
  • the coil carrier is also hollow cylindrical and has in its
  • Outer jacket has a U-shaped recess, viewed in cross section, in which the coil winding is received.
  • the coil carrier is thus arranged both in the radial direction and in the axial direction between the magnet coil and the magnet armature of the electromagnet, so that there is a relatively large distance between the magnet armature and the magnet coil. This leads to relatively large leakage losses and consequently to a slow build-up of force in the magnetic circuit of the electromagnet. The dynamics of the electromagnet are therefore not optimal.
  • this design of the coil carrier requires a relatively large amount of space, so that the electromagnet is large overall.
  • the known electromagnet with the solenoid coil is part of a solenoid valve of a fuel injection device of an internal combustion engine, through which the fuel injection is controlled.
  • the solenoid valve has to switch very quickly, which however, as stated above, is made more difficult by the formation of the coil carrier.
  • the most compact possible design of the solenoid valve is sought, which is also made more difficult by the design of the coil carrier.
  • the electromagnet according to the invention with the features according to claim 1 has the advantage that a small distance between the magnet coil and the magnet armature can be achieved by the disc-shaped design of the coil carrier, whereby the dynamics of the electromagnet is improved and its size is reduced.
  • the embodiment according to claim 2 enables a simple connection of the coil winding to the coil carrier.
  • the design according to claims 3 and 4 enables easy contacting of the coil winding.
  • FIG. 1 shows a detail of a fuel injection device for an internal combustion engine with a solenoid valve
  • FIG. 2 shows an electromagnet of the solenoid valve in an enlarged view
  • FIG. 3 shows a coil winding and a coil carrier of the electromagnet according to FIG. 2.
  • Fuel injection device for an internal combustion engine for example, a motor vehicle shown.
  • the internal combustion engine is preferably a self-igniting internal combustion engine and has one or more cylinders.
  • the fuel injection device can be designed, for example, as a pump-nozzle unit, which in each case has a high-pressure fuel pump 10 and a fuel injection valve 12 for each cylinder of the internal combustion engine, which have a common one
  • At least one solenoid valve 56, 60 for controlling the fuel injection is arranged on the pump-nozzle unit.
  • the fuel injection device can also be designed as a pump-line-nozzle unit, in which a high-pressure fuel pump and a fuel injection valve are also provided for each cylinder of the internal combustion engine, but are arranged separately from one another and are connected to one another via a hydraulic line. At the high pressure fuel pump or at
  • the fuel injection valve of the pump-line-nozzle unit has a solenoid valve for controlling the fuel injection.
  • the fuel injection device can also be designed as a common rail system, in which a
  • High-pressure fuel pump Fuel is pumped into a memory that is attached to the cylinders of the
  • the fuel injection device can also be designed as a fuel injection pump, through which fuel is conveyed under high pressure and to which fuel injection valves arranged on the cylinders of the internal combustion engine are connected, whereby at the
  • Fuel injection pump to control the solenoid valve High pressure generation and thus the fuel injection is arranged.
  • the high-pressure fuel pump 10 has a pump piston 20 which is tightly guided in a cylinder bore 18 of a pump body 16 and delimits a pump working space 22 in the cylinder bore 18.
  • the pump piston 20 is by a cam 24 of a camshaft
  • Internal combustion engine is driven at least indirectly, for example via a rocker arm, against the force of a return spring 26 in one stroke movement.
  • fuel is supplied to the pump working chamber 22 from a fuel reservoir 28, for example by means of a feed pump 29.
  • the fuel injection valve 12 has a valve body 30 which is connected to the pump body 16 and which can be constructed in several parts and in which an injection valve member 34 is guided in a bore 32 in a longitudinally displaceable manner.
  • An intermediate body 36 is arranged between the valve body 30 and the pump body 16.
  • Valve body 30 has at least one, preferably a plurality of injection openings 38 on its end region facing the combustion chamber of the cylinder of the internal combustion engine.
  • the injection valve member 34 has, for example, an approximately conical sealing surface 40 on its end region facing the combustion chamber, which cooperates with a valve seat 41 formed in the valve body 30 in its end region facing the combustion chamber, from or after which the injection openings 32 lead away.
  • annular space 42 between the injection valve member 34 and the bore 32 towards the valve seat 41, which in its End region facing away from valve seat 41 passes through a radial widening of bore 32 into a pressure space 44 surrounding injection valve member 34.
  • the injection valve member 34 has a pressure shoulder 46 directed towards the valve seat 41 at the level of the pressure chamber 44 due to a change in cross section.
  • a prestressed closing spring 48 engages, by means of which the injection valve member 34 is pressed toward the valve seat 41.
  • the closing spring 48 is in a spring chamber 49 in
  • Valve body 30 or arranged in the intermediate body 36, which connects to the bore 50.
  • a spring 50 with a smaller diameter adjoins the spring chamber 49 at its end facing away from the pressure chamber 44.
  • a control piston 51 is tightly guided in the bore 50 and delimits a control pressure chamber 52 in the bore 50.
  • the control piston 51 is supported on the injection valve member 34 and, depending on the pressure prevailing in the control pressure chamber 52, generates a force supporting the closing spring 48 in the closing direction on the injection valve member 34.
  • a channel leads from the pump working chamber 22 through the pump body 16, the intermediate body 36 and the valve body 30 54 into the pressure chamber 44 of the fuel injection valve 12. From the channel 54, a connection 55 leads to the feed pump 29 and to the fuel tank 28.
  • the connection 55 is controlled by a first solenoid valve 56, which is designed as a 2/2-way valve.
  • the solenoid valve 56 is controlled by an electronic control device 57 and is explained in more detail below.
  • a further channel 58 leads from the channel 54 into the control pressure chamber 52 and the control pressure chamber 52 has a connection 59 with a relief area, for example a return to the fuel reservoir 28.
  • the connection 59 of the control pressure chamber 52 to the relief area is controlled by a second solenoid valve 60, which is also by the control device 57 is controlled.
  • the pressure build-up in the pump work chamber 22 of the high-pressure fuel pump 10 is controlled by the first solenoid valve 56 and the pressure in the control pressure chamber 52 and thereby the opening of the fuel injection valve 12 is controlled by the second solenoid valve 60.
  • the second solenoid valve 60 and the control pressure chamber 52 can also be omitted, the opening of the fuel injection valve 12 being determined only by the closing spring 48. If the pressure prevailing in the pressure space 44 via the pressure shoulder 46 a greater force on the
  • Injection valve member 34 generates as the closing spring 48 and the pressure prevailing in the control pressure chamber 52, the injection valve member 34 moves in the opening direction 35 and releases the injection openings 38.
  • the solenoid valve has an electromagnet 62 with a magnet coil 64 and a magnet armature 66.
  • a valve member 68 is connected to the magnet armature 66, through which the connection to be controlled can be opened and closed.
  • the magnet coil 64 has a hollow cylindrical coil winding 70 which is connected to a coil carrier 72 arranged next to the latter in the axial direction.
  • the coil carrier 72 is arranged on the side of the coil winding 70 facing away from the magnet armature 66.
  • the coil carrier 72 is designed in the form of a flat disk and is preferably made of plastic, in particular of thermoplastic.
  • the coil winding 70 is connected to the end face of the coil carrier 72 facing this.
  • Coil winding 70 with the coil carrier 72 can be done by a positive connection, for example a toothing, or by gluing.
  • a particularly advantageous connection of the coil winding 70 to the coil carrier 72 is possible if the coil winding 70 consists of baked enamel wire, which melts when heated. After making the coil winding 70 is heated by generating a high current flow through it, so that the baked enamel wire melts, the coil winding 70 being simultaneously pressed in the axial direction with the coil carrier 72.
  • the plastic of the coil carrier 72 also melts and connects to the molten baked enamel of the coil winding 70 and after the subsequent cooling, the connection between the coil winding 70 and the coil carrier 72 is established.
  • the axial compression of the coil winding 70 also compresses it and it can be shaped in such a way that it has the required dimensions in length, diameter and thickness.
  • two tubular projections 74 are formed, into each of which one end 71 of the wire of the coil winding 70 is guided.
  • the lugs 74 are arranged approximately diametrically opposite one another.
  • a contact pin 76 is inserted into each of the lugs 74, for example pressed in, which is electrically connected to the respective end 71 of the coil winding 70, for example welded or soldered.
  • the magnet coil 64 is inserted into a magnet pot 78 and is fixed in it by pouring in a liquid casting compound 79, for example a thin liquid epoxy resin, which subsequently hardens.
  • the contact pins 76 protrude from the potting compound and the magnet pot 78.
  • the magnet armature 66 When the magnet coil 64 is not energized, the magnet armature 66 is held in a starting position by a spring. When the armature 66 moves, the valve member 68 is also moved between a position in which it opens the respective connection and a position in which it closes the respective connection.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Power Engineering (AREA)
  • Fluid Mechanics (AREA)
  • Fuel-Injection Apparatus (AREA)
  • Magnetically Actuated Valves (AREA)

Abstract

L'invention concerne un électro-aimant qui présente une bobine d'excitation (64) et un noyau magnétique (66). La bobine d'excitation (64) présente un support de bobine (72) et un enroulement (70) sous forme de cylindre creux, relié audit support de bobine. Le support de bobine (72) se présente sous forme de disque disposé dans le sens axial à proximité de l'enroulement (70).
PCT/DE2003/003577 2003-03-17 2003-10-28 Electro-aimant pour electrovanne WO2004083625A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP2004569460A JP4511950B2 (ja) 2003-03-17 2003-10-28 殊に電磁弁のための電磁石
EP03782089A EP1606510B1 (fr) 2003-03-17 2003-10-28 Electro-aimant pour electrovanne
DE50312487T DE50312487D1 (de) 2003-03-17 2003-10-28 Elektromagnet für ein magnetventil

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2003111523 DE10311523A1 (de) 2003-03-17 2003-03-17 Elektromagnet, insbesondere für ein Magnetventil
DE10311523.4 2003-03-17

Publications (1)

Publication Number Publication Date
WO2004083625A1 true WO2004083625A1 (fr) 2004-09-30

Family

ID=32920830

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE2003/003577 WO2004083625A1 (fr) 2003-03-17 2003-10-28 Electro-aimant pour electrovanne

Country Status (4)

Country Link
EP (1) EP1606510B1 (fr)
JP (1) JP4511950B2 (fr)
DE (2) DE10311523A1 (fr)
WO (1) WO2004083625A1 (fr)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH677153A5 (en) * 1989-02-13 1991-04-15 Landis & Gyr Betriebs Ag Power supply for electricity meter components
DE19749810A1 (de) * 1996-11-20 1998-05-28 Harman Int Ind Verfahren zur Herstellung von Spulen
EP1120563A2 (fr) * 2000-01-27 2001-08-01 Delphi Technologies, Inc. Injecteur de carburant
DE10051433A1 (de) * 2000-10-17 2002-05-02 Conti Temic Microelectronic Ventilspule für ein Ventilsteuergerät
US20020056820A1 (en) * 2000-05-30 2002-05-16 Urban Altenrenger Valve control device
EP1217272A1 (fr) * 2000-12-19 2002-06-26 Fluid Automation Systems S.A. Electrovanne
DE10202324A1 (de) * 2002-01-23 2003-07-31 Bosch Gmbh Robert Magnetventil und Verfahren zu seiner Herstellung

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6117704U (ja) * 1984-07-05 1986-02-01 愛三工業株式会社 電磁石
DE59103179D1 (de) * 1991-01-15 1994-11-10 Teves Gmbh Alfred Elektrohydraulische druckregelvorrichtung.
JPH0854080A (ja) * 1994-08-09 1996-02-27 Nisshinbo Ind Inc 電子制御装置一体型圧力制御装置
DE4431044A1 (de) * 1994-09-01 1996-03-07 Bosch Gmbh Robert Gasverteilereinrichtung für Brennstoffeinspritzanlagen

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH677153A5 (en) * 1989-02-13 1991-04-15 Landis & Gyr Betriebs Ag Power supply for electricity meter components
DE19749810A1 (de) * 1996-11-20 1998-05-28 Harman Int Ind Verfahren zur Herstellung von Spulen
EP1120563A2 (fr) * 2000-01-27 2001-08-01 Delphi Technologies, Inc. Injecteur de carburant
US20020056820A1 (en) * 2000-05-30 2002-05-16 Urban Altenrenger Valve control device
DE10051433A1 (de) * 2000-10-17 2002-05-02 Conti Temic Microelectronic Ventilspule für ein Ventilsteuergerät
EP1217272A1 (fr) * 2000-12-19 2002-06-26 Fluid Automation Systems S.A. Electrovanne
DE10202324A1 (de) * 2002-01-23 2003-07-31 Bosch Gmbh Robert Magnetventil und Verfahren zu seiner Herstellung

Also Published As

Publication number Publication date
EP1606510B1 (fr) 2010-03-03
DE50312487D1 (de) 2010-04-15
JP4511950B2 (ja) 2010-07-28
DE10311523A1 (de) 2004-09-30
EP1606510A1 (fr) 2005-12-21
JP2006514207A (ja) 2006-04-27

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