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EP1179675A2 - Electrovanne pour commande d'un injecteur de moteurs à combustion interne et électro-aimant pour celle-ci - Google Patents

Electrovanne pour commande d'un injecteur de moteurs à combustion interne et électro-aimant pour celle-ci Download PDF

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Publication number
EP1179675A2
EP1179675A2 EP01116612A EP01116612A EP1179675A2 EP 1179675 A2 EP1179675 A2 EP 1179675A2 EP 01116612 A EP01116612 A EP 01116612A EP 01116612 A EP01116612 A EP 01116612A EP 1179675 A2 EP1179675 A2 EP 1179675A2
Authority
EP
European Patent Office
Prior art keywords
magnetic core
solenoid valve
electromagnet
sleeve part
armature
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Withdrawn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
EP01116612A
Other languages
German (de)
English (en)
Other versions
EP1179675A3 (fr
Inventor
Rainer Haeberer
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.)
Robert Bosch GmbH
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 EP1179675A2 publication Critical patent/EP1179675A2/fr
Publication of EP1179675A3 publication Critical patent/EP1179675A3/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Withdrawn legal-status Critical Current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
    • F02M63/0017—Valves characterised by the valve actuating means electrical, e.g. using solenoid using electromagnetic operating means
    • F02M63/0019—Valves characterised by the valve actuating means electrical, e.g. using solenoid using electromagnetic operating means characterised by the arrangement of electromagnets or fixed armatures
    • 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
    • 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
    • F02M63/0017—Valves characterised by the valve actuating means electrical, e.g. using solenoid using electromagnetic operating means
    • F02M63/0021—Valves characterised by the valve actuating means electrical, e.g. using solenoid using electromagnetic operating means characterised by the arrangement of mobile armatures
    • F02M63/0022—Valves characterised by the valve actuating means electrical, e.g. using solenoid using electromagnetic operating means characterised by the arrangement of mobile armatures the armature and the valve being allowed to move relatively to each other
    • 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
    • F02M63/007—Details not provided for in, or of interest apart from, the apparatus of the groups F02M63/0014 - F02M63/0059
    • F02M63/0075—Stop members in valves, e.g. plates or disks limiting the movement of armature, valve or spring
    • 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
    • F02M2200/02—Fuel-injection apparatus having means for reducing wear
    • 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
    • F02M2200/90—Selection of particular materials
    • F02M2200/9015—Elastomeric or plastic 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
    • F02M2200/90—Selection of particular materials
    • F02M2200/9092—Sintered 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
    • F02M2547/00—Special features for fuel-injection valves actuated by fluid pressure
    • F02M2547/003—Valve inserts containing control chamber and valve piston

Definitions

  • the invention relates to a solenoid valve for controlling a Injection valve for internal combustion engines and an electromagnet for such a solenoid valve.
  • EP 0 665 374 A1 describes a fuel injection valve for internal combustion engines with an axially movable valve member for opening and closing an injection opening Injection valve known, the movement of the valve member controlled via the fuel pressure in a control pressure chamber is controlled by a solenoid valve becomes.
  • the solenoid valve has one arranged in a housing part Electromagnets with coil and magnetic core, one axially movable armature and a moving with the armature and acted upon by a closing spring in the closing direction Control valve member on that with a valve seat of the solenoid valve interacts and the fuel outflow from the control pressure chamber controls.
  • a fuel injector is also called an injector.
  • the electromagnet includes a magnetic core made of a mixture of plastic and metal powder with an axial passage opening for the outflow of the fuel. Due to the choice of materials occur in the magnetic core only low eddy currents. However, the disadvantage is that mechanical loads and high temperatures affect the inner Impair the structure and stability of the magnetic core. in the Over time, migration in the magnetic core leads to one Changing the distance between the armature and magnetic core, whereby the amount of fuel flowing out of the control pressure chamber changed and the operation of the solenoid valve disadvantageous being affected.
  • a solenoid valve with an electromagnet is also advantageous according to independent claim 8 of the application.
  • the core is stabilized in the axial direction by the support frame and achieved that the distance between the Anchor and the magnetic core did not enlarge over time.
  • the from the clamping of the magnetic core in the housing of the solenoid valve and resulting from the anchor stop The supporting structure is advantageous added, which relieves the relatively soft magnetic core becomes.
  • the support frame advantageously comprises an outer sleeve part, which on an extending in the axial direction Shell surface of the magnetic core is arranged.
  • the sleeve part can be made, for example, as a bent stamped part from sheet metal become.
  • the composite part from the outer sleeve part and the magnetic core can be easily glued, Clamping, by spraying or other suitable Way.
  • the outer sleeve part To hold the sleeve part firmly on the magnetic core enable, it is advantageous to use the outer sleeve part To provide recesses in which of the lateral surface of protruding projections of the magnetic core. hereby can be avoided that shear forces detach the external Part of the sleeve from the magnetic core. Through the recesses can also suppress eddy currents in the scaffolding become.
  • the composite part can advantageously with sections of the outer Sleeve part that is a bit far from the first side and / or second side of the magnetic core protrude between the mutually facing projections of the housing of the solenoid valve be clamped.
  • outer sleeve part additionally comprises an inner sleeve part, which is arranged in the through opening of the magnetic core and additionally stabilizes the magnetic core in the axial direction.
  • a portion located on the first side of the magnetic core the scaffolding can advantageously be a defined one Stop surface for one interacting with the electromagnet Form anchor. This section can be done either the lower section of the outer or inner sleeve part be formed.
  • the portion of the scaffolding forming the stop surface protrudes a bit from the first side of the magnetic core, so that the anchor has a defined minimum distance of cannot fall below the first side of the magnetic core.
  • the portion of the stop surface forming Support frame is flush with the first side of the magnetic core is arranged. This can be done, for example, by surface grinding of the composite part can be achieved.
  • the spacer can be in the anchor can be integrated because it is simple can be manufactured very precisely.
  • the anchor with a protrusion protruding from an anchor plate be provided for contact with the stop surface, so that the anchor plate a defined minimum distance from the cannot fall below the first side of the magnetic core.
  • the scaffold is advantageously made of a non-magnetic Made of material. To ensure sufficient stability of the To ensure support structure, it is advantageous that Support frame made of steel.
  • a funnel-shaped bend on the second side of the magnetic core facing end portion of the inner sleeve part prevents the inner sleeve part from coming out of the Composite part when the anchor hits the inner sleeve part.
  • Fig. 1 shows the upper part of a known in the prior art Fuel injector 1, which is for use is determined in a fuel injection system with a High-pressure fuel storage is equipped by a High pressure feed pump continuously with high pressure fuel is supplied.
  • the fuel injection valve shown in FIG. 1 1 has a valve housing 4 with a longitudinal bore 5 on, in which a piston-shaped as a push rod Part 6 is arranged with one end on a in a valve member, not shown, arranged valve member acts. That also not shown as a valve needle trained valve member is arranged in a pressure chamber, the via a pressure bore 8 with high pressure Fuel is supplied. With an opening stroke movement of the Part 6 is the valve needle by constantly on the pressure shoulder attacking high fuel pressure in the pressure chamber the closing force of a spring raised. Through one then the injection takes place connected to the pressure chamber of the fuel in the combustion chamber of the internal combustion engine. By lowering the part 6, the valve needle is in Closing direction pressed into the valve seat of the injection valve and the injection process ends.
  • the part 6 is at its the Valve needle opposite end in a cylinder bore 11 out, which is introduced into a valve piece 12 which is inserted into the valve housing 4.
  • a control pressure chamber 14 which via an inlet channel 16 is connected to a high-pressure fuel connection 3.
  • the Inlet channel 16 is essentially of three parts. A bore leading radially through the wall of the valve piece 12, the inner walls of an inlet throttle over part of their length Train 15, is with the valve piece on the circumference surrounding annulus 20 constantly connected, which Annulus in turn is inserted into the inlet channel
  • Fuel filter 42 in constant communication with the High-pressure fuel connection 3 in the valve housing 4 screw-in connector 9 stands.
  • the annulus 20 is sealed to the longitudinal bore 5 via a sealing ring 39.
  • the control pressure chamber 14 Via the inlet channel 16, the control pressure chamber 14 is in the High-pressure fuel accumulator prevailing high fuel pressure exposed.
  • the outlet channel 17 emerges from the valve piece 12 in the region of a conically countersunk part 21 of the outer end face of the valve piece 12.
  • the valve piece 12 is fixed in a flange region 22 Screw member 23 clamped to the valve housing 4.
  • a valve seat 24 is formed in the conical part 21, with which a control valve member 25 of the injection valve controlling solenoid valve 30 cooperates.
  • the control valve member 25 is in shape with a two-part anchor an anchor bolt 27 and an anchor plate 28 coupled, which armature with an electromagnet of the solenoid valve 30 works together.
  • the electromagnet comprises a magnetic core 29 with an axial through opening 54 and one in one Recess 74 of the magnetic core arranged coil 53, the electrical connections 52 through the magnetic core and a closure part 51 are led to the outside.
  • the solenoid valve 30 further includes a housing part housing the electromagnet 50 that with the valve housing 4 via screwable connection means 7 is connected.
  • the housing part 50 is in the essentially cylindrical and with the closure part 51 closable, in which a fuel low pressure connection 10 is arranged.
  • the magnetic core 29 is between mutually facing projections of the housing part 50 and the Locking part 51 held clamped, the through opening 54 with the fuel low pressure connection 10 is aligned so that a low pressure chamber formed in the solenoid valve 19 via the passage opening 54 with the fuel low pressure connection 10 is connected.
  • An anchor plate 28 is under the influence of its inertial mass against the biasing force a return spring 35 dynamically displaceable the anchor bolt 27 and is supported by this return spring at rest against a stop ring 26 on the anchor bolt pressed.
  • the return spring 35 is supported on the housing via a flange 32 of a slider guiding the anchor bolt 34 from that with this flange between valve piece 12 and screw part 23 is firmly clamped in the valve housing.
  • the Anchor bolt 27 and with it the armature disk 28 and with the control valve member 25 connected to the anchor bolt are permanent through a support that is fixed to the housing in the through opening 54 of the magnetic core 29 arranged closing spring 31 in Closing direction applied, so that the control valve member 25 is normally in the closed position on the valve seat 24.
  • the magnetic core 29 is used in the known solenoid valves made of a plastic-metal powder mixture manufactured. Such cores are relatively soft and tend to change shape at high temperatures migration of the core material result. The one from the Clamping the core resulting in the housing 50.51 mechanical forces intensify this effect. Moreover some injectors are designed so that the armature immediately abuts the magnetic core 29, whereby the magnetic core is heavily loaded in the axial direction. All of this leads to an adverse change in that from the control pressure chamber running fuel and thus also to a change of the injection behavior.
  • Fig. 2 shows a first embodiment of an inventive Magnetic valve.
  • the housing 50.51 of the solenoid valve 30 is only partially shown in FIG. 2.
  • the in 2 can be used instead of the electromagnet shown in FIG. 1 introduced into the housing of the solenoid valve become.
  • the electromagnet comprises one Coil 53 and a composite part made of a magnetic core 29 and a metallic support structure 60.
  • the magnetic core 29 has an essentially hollow cylindrical shape with a axial through opening 54, which a first side 68 with one of these opposite side 69 connects and a lateral surface extending in the axial direction, on which the scaffold is arranged.
  • the scaffolding 60 is manufactured as a cylindrical sleeve part and with recesses 63 provided.
  • Eddy currents become through the recesses 63 prevented in the outer metal sleeve.
  • 29 it is possible, for example, in a spraying process the plastic-metal powder mixture for the magnetic core to be injected into the sleeve part 60.
  • the protruding projections 64 fill in the recesses 63 of the support structure 60, see above that an integrated composite part made of a magnetic core and support frame arises.
  • the coil 53 of the electromagnet can in one the through hole 54 surrounding annular recess 74 of the magnetic core 29 may be arranged.
  • the electrical Connections of the coil are not shown in Fig. 2, can but like the known electromagnets through the magnetic core be led outside.
  • the armature 28 of the solenoid valve is shown only schematically in Fig. 2. He can like the anchor shown in Fig. 1 in several parts or in one piece be formed and has an anchor plate on the interacts with the electromagnet.
  • Sections 66 and 65 from the first side 68 and the second Page 69 of the magnetic core 29 there are annular ones Sections 66 and 65 from the first side 68 and the second Page 69 of the magnetic core 29. That from scaffolding 60 and Magnetic core 29 existing composite part is between each other facing projections 55, 56 of the housing part 50 and Closure part 51 clamped.
  • the protrusions come here 55.56 on the sections 65.66 to the plant, whereby achieved is that the axial clamping forces for fixing the magnetic core are essentially transferred to the scaffolding 60 and the relatively soft magnetic core 29 is relieved.
  • the section protruding from the first side 68 65 of the outer sleeve part 60 simultaneously as a stop surface serve for the magnet armature 28.
  • this Section 65 from the first side 68 of the magnetic core 29 a minimum distance between armature and magnetic core is advantageous defined so that on washers for settings the distance can be dispensed with.
  • Fig. 3 is a second embodiment of the invention Solenoid valve shown in which the scaffold an outer sleeve part 60 and additionally an inner sleeve part 61 which, like the outer sleeve part, is cylindrical is trained. While the outer sleeve part 60 is applied to the outer surface of the magnetic core, is the inner sleeve part 61 on the inner wall of the through opening 54 of the magnetic core arranged. Both sleeve parts are made of metal and extend continuously in the axial direction from the first side 68 to the second Page 69 of the magnetic core 29 and stabilize the core in this direction.
  • the composite part made of magnetic core and sleeve parts can for example by gluing, bracing, spraying or baked lacquer coating.
  • the armature in the solenoid valve shown in Fig. 3 differs from the flat anchor shown in FIG. 2. He has an annular anchor plate 28 of which a circular one Projection 76 to the first side 68 of the magnetic core projects. An axial guide pin protruding from the projection 77 engages to guide the axially movable armature the inner sleeve part 61. The one attracted by the electromagnet Anchor comes with the projection 76 on the flush the first side 68 provided end portion 75 of the inner Sleeve part 61 to the system. By the stop of the projection 76 on the stop 75 is advantageously achieved that the composite part transmits shock from the inner sleeve part recorded and transferred to the plate member 70.
  • the distance d between the anchor plate 28 and the first side of the Magnetic core 29 defined by the height of the projection 76, which are formed on the anchor with great accuracy can be.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Electromagnetism (AREA)
  • Fluid Mechanics (AREA)
  • Magnetically Actuated Valves (AREA)
  • Fuel-Injection Apparatus (AREA)
  • Electromagnets (AREA)
EP01116612A 2000-08-10 2001-07-12 Electrovanne pour commande d'un injecteur de moteurs à combustion interne et électro-aimant pour celle-ci Withdrawn EP1179675A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10039039 2000-08-10
DE10039039A DE10039039A1 (de) 2000-08-10 2000-08-10 Magnetventil zur Steuerung eines Einspritzventils für Brennkraftmaschinen und Elektromagnet dafür

Publications (2)

Publication Number Publication Date
EP1179675A2 true EP1179675A2 (fr) 2002-02-13
EP1179675A3 EP1179675A3 (fr) 2004-02-04

Family

ID=7651967

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01116612A Withdrawn EP1179675A3 (fr) 2000-08-10 2001-07-12 Electrovanne pour commande d'un injecteur de moteurs à combustion interne et électro-aimant pour celle-ci

Country Status (3)

Country Link
EP (1) EP1179675A3 (fr)
JP (1) JP2002161825A (fr)
DE (1) DE10039039A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104916385A (zh) * 2015-06-23 2015-09-16 哈尔滨工程大学 轴向冷却径向线圈式高速电磁铁
CN104916386A (zh) * 2015-06-23 2015-09-16 哈尔滨工程大学 轴向冷却径向线圈式并联磁路电磁铁

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10210317A1 (de) * 2002-03-08 2003-09-25 Bosch Gmbh Robert Hochdruckelement für Einspritzanlagen mit verringerter Leckage
DE102006021736A1 (de) * 2006-05-10 2007-11-15 Robert Bosch Gmbh Kraftstoffinjektor mit druckausgeglichenem Steuerventil
DE102011088463A1 (de) 2011-06-29 2013-01-03 Robert Bosch Gmbh Bauteil für einen Magnetaktor sowie Verfahren zu dessen Herstellung

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5288025A (en) * 1992-12-18 1994-02-22 Chrysler Corporation Fuel injector with a hydraulically cushioned valve
IT1261156B (it) * 1993-12-30 1996-05-09 Elasis Sistema Ricerca Fiat Elettromagnete di comando di una valvola di dosaggio per un iniettore di combustibile
JPH0849624A (ja) * 1994-06-01 1996-02-20 Zexel Corp 電磁式燃料噴射弁の燃料侵入防止装置
IT1310757B1 (it) * 1999-11-30 2002-02-22 Fiat Ricerche Valvola di dosaggio a comando elettromagnetico per un iniettore dicombustibile

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104916385A (zh) * 2015-06-23 2015-09-16 哈尔滨工程大学 轴向冷却径向线圈式高速电磁铁
CN104916386A (zh) * 2015-06-23 2015-09-16 哈尔滨工程大学 轴向冷却径向线圈式并联磁路电磁铁

Also Published As

Publication number Publication date
JP2002161825A (ja) 2002-06-07
EP1179675A3 (fr) 2004-02-04
DE10039039A1 (de) 2002-02-21

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