EP0516632B1 - Electromagnetically operated valve - Google Patents

Electromagnetically operated valve Download PDF

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Publication number
EP0516632B1
EP0516632B1 EP91902270A EP91902270A EP0516632B1 EP 0516632 B1 EP0516632 B1 EP 0516632B1 EP 91902270 A EP91902270 A EP 91902270A EP 91902270 A EP91902270 A EP 91902270A EP 0516632 B1 EP0516632 B1 EP 0516632B1
Authority
EP
European Patent Office
Prior art keywords
valve
housing shell
core
housing
circumference
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.)
Expired - Lifetime
Application number
EP91902270A
Other languages
German (de)
French (fr)
Other versions
EP0516632A1 (en
Inventor
Ferdinand Reiter
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
Family has litigation
Priority to DE4003229 priority Critical
Priority to DE19904003229 priority patent/DE4003229A1/en
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Priority to PCT/DE1991/000052 priority patent/WO1991011605A2/en
Publication of EP0516632A1 publication Critical patent/EP0516632A1/en
Application granted granted Critical
Publication of EP0516632B1 publication Critical patent/EP0516632B1/en
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=6399370&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0516632(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02MSUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M51/00Fuel-injection apparatus characterised by being operated electrically
    • F02M51/06Injectors peculiar thereto with means directly operating the valve needle
    • F02M51/061Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means
    • F02M51/0614Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of electromagnets or fixed armature
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02MSUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M51/00Fuel-injection apparatus characterised by being operated electrically
    • F02M51/06Injectors peculiar thereto with means directly operating the valve needle
    • F02M51/061Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means
    • F02M51/0625Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures
    • F02M51/0664Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a cylindrically or partly cylindrically shaped armature, e.g. entering the winding; having a plate-shaped or undulated armature entering the winding
    • F02M51/0671Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a cylindrically or partly cylindrically shaped armature, e.g. entering the winding; having a plate-shaped or undulated armature entering the winding the armature having an elongated valve body attached thereto
    • F02M51/0682Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a cylindrically or partly cylindrically shaped armature, e.g. entering the winding; having a plate-shaped or undulated armature entering the winding the armature having an elongated valve body attached thereto the body being hollow and its interior communicating with the fuel flow
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01FMAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F7/00Magnets
    • H01F7/06Electromagnets; Actuators including electromagnets
    • H01F7/08Electromagnets; Actuators including electromagnets with armatures

Abstract

In prior art electromagnetically operated valves with a core surrounded by a coil magnet and with an armature by means of which a valve-closure element operating in conjunction with a rigidly mounted valve seat is actuated, the periphery of the coil magnet is surrounded by at least one U-shaped conduction element which orients the magnetic-field lines. This gives rise to undesirable stray flux, however. The new valve is at least partly surrounded by a metal housing (3) which completes the magnetic circuit and is hermetically joined at the upper end (35) to the core (1) and at the lower end (36) to a connector piece (8) and projects at least in the longitudinal direction beyond the coil magnet (2). This valve design is particularly suitable for use as an injection valve in a fuel-injection system.

Description

    State of the art
  • The invention is based on an electromagnetically actuated valve according to the preamble of patent claim 1. Such an electromagnetically actuated valve is already known (DE-A-38 25 135), but in which the solenoid coil only partially covers at least one of its circumference Guide the magnetic field lines serving bow-shaped guide element is surrounded. In addition, plastic material of a plastic extrusion coating is located in a gap formed between the magnet coil and the guide element. The unfavorably designed magnetic field causes a high magnetic leakage flux and thus a high energy expenditure to open the valve. The central fuel supply in connection with the angled electrical connector prevents the contacting of several valves by means of a common connector strip and the series connection of several valves arranged one behind the other.
  • Advantages of the invention
  • The valve according to the invention with the characterizing features of claim 1 has the advantage of a compact valve with a compact magnetic circuit. A short way of the magnetic Field-forming closed field lines and the enveloping housing jacket reduce the magnetic leakage flux and thus increase the ratio between useful flow and leakage flow which is decisive for the energy to be used, so that less energy is required to open the valve. The housing jacket enables a compact and simple design of the valve and thus also an inexpensive assembly during manufacture. It is particularly advantageous if the metal housing jacket is tightly connected to the connecting part by welding, because at the same time the necessary seal is formed between the housing jacket and the connecting part.
  • The measures listed in the subclaims allow advantageous developments and improvements of the valve specified in claim 1.
  • It is advantageous if the housing jacket has an outwardly facing housing shoulder which, together with an end face of the plastic casing facing in the direction of the housing shoulder, forms the side faces of an annular groove, the groove base of which is formed by the circumference of the housing jacket. The housing shoulder prevents a sealing ring mounted on the circumference of the housing jacket from remaining in this receptacle when the valve is removed from a valve receptacle.
  • In order to prevent the sealing ring from slipping off the housing shell, it is also advantageous if an annular groove is provided on the circumference of the housing shell, the radially extending side surfaces of which face an end face of the plastic sheathing pointing in the direction of the armature and an end face of a pull ring drawn onto the housing shell and the bottom of the groove is formed by the circumference of the housing shell.
  • It is particularly advantageous if at least one radial transverse opening serving to feed the fuel is formed between an upper sealing ring on the housing jacket and a lower sealing ring on the connecting part, said radial opening being in communication with a valve space extending to the valve seat. The side fuel supply and the axially arranged electrical connector allow a series flushing of several valves arranged in series with the fuel, the full integration of several valves in receptacles of the intake manifold of the internal combustion engine and the common contacting by means of a common connector strip.
  • drawing
  • An embodiment of the invention is shown in simplified form in the drawing and explained in more detail in the following description.
  • Description of the embodiment
  • The electromagnetically actuated valve shown in the drawing, for example, in the form of an injection valve for fuel injection systems of internal combustion engines has a hollow core 1, which has a coil former 7 which is stepped in the radial direction and is provided with a winding which is stepped in the radial direction Magnetic coil 2 partially surrounds. Subsequent to a lower core end 4 of the core 1, a hollow intermediate part 6 is tightly connected thereto by welding, concentrically with a valve longitudinal axis 5. At its end facing away from the core 1, the intermediate part 6 is tightly welded to a tubular, cylindrical connecting part 8. The lining up of core 1, intermediate part 6 and connecting part 8 thus represents a rigid metal unit.
  • In the direction of the longitudinal axis 5 of the valve, a ball element 25, preferably having a hardened surface, is pressed into a core bore 17 of the core 1, the press-in depth of which determines the spring force of a return spring 26, which rests directly on the ball element 25. With its end facing away from the ball element 25, the return spring 26 is supported on an end face of a connecting tube 11, which is connected at its end facing the core 1 to an armature 12, which at the same time serves as a radial guide for the return spring 26, by welding. At the end of the connecting tube 11 facing away from the armature 12, a valve-closing body 10 designed as a ball is fastened by welding and cooperates with a fixed valve seat 15.
  • A valve seat body 14 having the fixed valve seat 15 is tightly connected to the connecting part 8 by welding. At least one spray orifice 18 is formed in the valve seat body 14 downstream of the conical valve seat 15.
  • At least partially the core 1, completely the magnetic coil 2 and part of the connecting part 8 are enclosed in the axial direction by a metal casing 3 closing the magnetic circuit, which is made of sheet metal by deep drawing or pressing and with an upper end 35 with a smaller diameter Encompasses core 1. The housing shell 3 is at its upper end 35 with the core 1 by welding at least in places and at its lower end End 36 tightly connected to the connecting part 8 by welding. In order to avoid air gaps, the housing jacket 3 is designed such that its upper end 35 fits tightly against the core 1 and with its lower end 36 against the connecting part 8. Starting from the upper end 35, the magnetic coil 2 extends radially outward around a bottom 37 of the housing shell 3 to the larger-diameter cylindrical shell part 38 with the lower end 36.
  • The connecting part 8 has in the illustrated embodiment between an upper sealing ring 39 on the casing part 38 of the housing shell 3 and a lower sealing ring 40 on the connecting part 8 at least one radial cross opening 20 serving the fuel inlet, which with the valve seat 15 reaching valve chamber 16 inside the Connection part 8 is connected. In the present exemplary embodiment, the transverse opening 20 is formed in the connecting part 8, but it can also run at the level of the jacket part 38.
  • By means of a groove 43 in the connecting part 8 and a shoulder 44 on the connecting part 8, a carrier ring 32 is held, which has a fuel filter 33, through which fuel can flow to the transverse opening 20.
  • The coil body 7 of the magnet coil 2 is produced by a plastic extrusion coating, by means of which the electrical connecting plugs 30 required for contacting the magnet coil 2 are also molded on, so that an independent plastic injection molding is formed. This plastic injection molded part is inserted into the housing shell 3 in such a way that it bears against the bottom 37 and the connecting plugs 30 protrude outward through through openings 45 in the bottom 37 approximately parallel to the longitudinal valve axis 5 in the direction of the upper end 35.
  • The core bore 17 is closed at its end facing away from the valve closing body 10 by a plastic plug 31, so that when a plastic jacket 22 is injected, which surrounds the end of the valve facing away from the valve seat body 14 at the bottom 37 and part of the connector plug 30, no liquid plastic into the Core hole 17 can reach. The plastic sheath 22 extends radially beyond the bottom 37. The core bore 17 is sealed off from the fuel located in the valve interior by means of the spherical element 25 pressed into the core bore 17.
  • An annular groove 47 is provided on the circumference of the casing part 38 of the housing casing 3, the radially extending side surfaces of which are directed through the end face 49 of the plastic casing 22 pointing in the direction of the armature and the end face of a pull ring 23 which is drawn onto the casing part 38 and which, for example, has an L-shaped cross-sectional shape has, and the groove bottom is formed by the circumference of the jacket part 38. The pull ring 23 ensures when removing the valve from a receptacle (not shown) in the intake manifold of an internal combustion engine that an upper sealing ring 39 mounted in the annular groove largely maintains its axial position on the circumference of the casing part 38 and does not remain in the intake manifold receptacle.
  • Another embodiment of the invention is that the casing part 38 has a dashed, outwardly facing housing shoulder 48 which, together with the end face of the plastic casing 22 pointing in the direction of the casing shoulder 48, forms the side faces of the annular groove 47, the groove base of which through the circumference of the casing part 38 is formed. This solution also results in that an upper sealing ring 39 mounted on the circumference of the jacket part 38 does not remain in this receptacle when the valve is removed from a receptacle of the intake manifold.
  • The lower sealing ring 40 is held on the connecting part 8 in a lower annular groove 50, which is delimited by two shoulders 51, 52 of the connecting part 8 which run radially outward from one another.
  • The armature 12 is guided in a slide opening 54 of the intermediate part 6, while the valve closing body 10 is slidably mounted in a guide opening 55 of the valve seat body 14.
  • The valve with the metal housing shell 3 closing the magnetic circuit enables not only a compact magnetic field that requires little energy to open the valve, but also a compact and simple construction. In connection with the axial connecting plugs 30 and the radial fuel feed, valves according to the invention allow a series flushing of several valves arranged one behind the other and their common electrical contacting by means of a common plug connector.

Claims (4)

  1. Electromagnetically operable valve, in particular an injection valve for fuel injection systems of internal combustion engines, having a core (1) surrounded by a solenoid (25), having an armature (12) by means of which a valve closing member (10) which interacts with a fixed valve seat (15) can be operated, having a tubular metal adapter (6) which is connected in a sealing manner with its one end to a core end (4) of the core (1) which faces the armature (12) and with its other end to a tubular connecting part (8), having a metal valve seating member (14) which has the fixed valve seat (15) and is fixed to the connecting part (8) at its end averted from the adapter (6), and having a plastic sheath (22) which surrounds the end of the valve averted from the valve seating member (14), the valve being enclosed at least partially by a metal housing shell (3) which closes the magnetic circuit, is connected at its upper end (35) to the core (1) and its lower end (36) to the connecting part (8), and overlaps the solenoid (2) at least in the axial direction, characterized in that the metal housing shell (3) is connected in a sealing manner to the connecting part (8) by welding.
  2. Valve according to Claim 1, characterized in that the housing shell (3) has a housing shoulder (48) which points outwards and together with an end face (49) of the plastic sheath (22) which points in the direction of the housing shoulder (48) forms the end faces of an annular groove (47) of which the groove bottom is formed by the circumference of the housing shell (3).
  3. Valve according to one of Claims 1 or 2, characterized in that there is provided on the circumference of the housing shell (3) an annular groove (47) whose radially extending end faces are formed by an end face (49), pointing in the direction of the armature (12), of the plastic sheath (22) and an end face of a draw ring (23) drawn up onto the housing shell (3), and whose groove bottom is formed by the circumference of the housing shell (3).
  4. Valve according to one of Claims 1 to 3, characterized in that there is constructed between an upper gasket ring (39) on the housing shell (3) and a lower gasket ring (40) on the connecting part (8) at least one radial transverse opening (20) which serves to feed fuel and which is connected to a valve chamber (16) reaching up to the valve seat (15).
EP91902270A 1990-02-03 1991-01-21 Electromagnetically operated valve Expired - Lifetime EP0516632B1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
DE4003229 1990-02-03
DE19904003229 DE4003229A1 (en) 1990-02-03 1990-02-03 Electromagnetically actuable valve
PCT/DE1991/000052 WO1991011605A2 (en) 1990-02-03 1991-01-21 Electromagnetically operated valve

Publications (2)

Publication Number Publication Date
EP0516632A1 EP0516632A1 (en) 1992-12-09
EP0516632B1 true EP0516632B1 (en) 1994-08-24

Family

ID=6399370

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91902270A Expired - Lifetime EP0516632B1 (en) 1990-02-03 1991-01-21 Electromagnetically operated valve

Country Status (9)

Country Link
US (1) US5330153A (en)
EP (1) EP0516632B1 (en)
JP (1) JP3262793B2 (en)
KR (1) KR100195822B1 (en)
BR (1) BR9105982A (en)
DE (1) DE4003229A1 (en)
ES (1) ES2061230T3 (en)
RU (1) RU2047034C1 (en)
WO (1) WO1991011605A2 (en)

Families Citing this family (28)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1250846B (en) * 1991-10-11 1995-04-21 Weber Srl metering valve and fuel pulverizing electromagnetically actuated having very reduced dimensions
DE4201401A1 (en) * 1992-01-21 1993-07-22 Bosch Gmbh Robert Displacement pump conveying fuel in motor vehicle - has drive motor installed into jar-shaped housing as complete prefabricated component of motor housing
DE4325842A1 (en) * 1993-07-31 1995-02-02 Bosch Gmbh Robert Fuel injection valve
ES2106667B1 (en) * 1994-01-15 1998-05-16 Fichtel & Sachs Ag Valve actuation installation, in particular for a vibration damper.
US6811779B2 (en) 1994-02-10 2004-11-02 Imclone Systems Incorporated Methods for reducing tumor growth with VEGF receptor antibody combined with radiation and chemotherapy
JPH08189439A (en) * 1994-12-28 1996-07-23 Zexel Corp Solenoid type fuel injection valve and its nozzle assembly fitting method
US5577663A (en) * 1995-05-19 1996-11-26 Siemens Automotive Corporation Bottom feed injector with top calibration feed
US5769328A (en) * 1995-12-26 1998-06-23 General Motors Corporation Fuel interconnect for fuel injector
JPH1047199A (en) * 1996-07-31 1998-02-17 Mitsubishi Electric Corp Fuel injection valve for cylinder injection of fuel
DE19631066A1 (en) * 1996-08-01 1998-02-05 Bosch Gmbh Robert Fuel injector
DE19712922B4 (en) * 1997-03-27 2005-08-11 Robert Bosch Gmbh Fuel injector
US6392516B1 (en) * 1998-12-04 2002-05-21 Tlx Technologies Latching solenoid with improved pull force
US6198369B1 (en) * 1998-12-04 2001-03-06 Tlx Technologies Proportional actuator for proportional control devices
DE19860631A1 (en) 1998-12-29 2000-07-06 Bosch Gmbh Robert Electromagnetically actuated valve and method for producing a magnetic jacket for a valve
US6489870B1 (en) 1999-11-22 2002-12-03 Tlx Technologies Solenoid with improved pull force
JP3799599B2 (en) * 2001-02-26 2006-07-19 株式会社デンソー Welding apparatus and welding method
US6601785B2 (en) 2001-06-01 2003-08-05 Siemens Automotive Corporation Self-locking spring stop for fuel injector calibration
US6981662B2 (en) * 2002-11-08 2006-01-03 Siemens Diesel Systems Technology Coupling device assembly
DE102004025969A1 (en) * 2004-05-18 2005-12-15 Hydraulik-Ring Gmbh Solenoid valve for cam shaft adjustment device, has magnetic part comprising housing connected with bush of valve part, and seal arranged in housing for sealing valve in mounting position, where housing has axial retaining components
DE102004058677A1 (en) * 2004-12-06 2006-06-14 Robert Bosch Gmbh Injector
EP2916054A2 (en) * 2007-03-28 2015-09-09 Fillon Technologies Dispensing valve
DE102010040898A1 (en) * 2010-09-16 2012-03-22 Robert Bosch Gmbh Fuel injector
DE102010040910A1 (en) * 2010-09-16 2012-03-22 Robert Bosch Gmbh Fuel injector
DE102010040916A1 (en) * 2010-09-16 2012-03-22 Robert Bosch Gmbh Fuel injector
DE102010040914A1 (en) * 2010-09-16 2012-03-22 Robert Bosch Gmbh Fuel injector
DE102012000676A1 (en) 2012-01-17 2013-07-18 Knf Flodos Ag displacement
CN105276265B (en) * 2015-05-22 2018-12-04 常州市诚利电子有限公司 A kind of coil of electronic expansion valve
GB2577072A (en) * 2018-09-12 2020-03-18 Delphi Automotive Systems Lux Power component heat sink arrangement

Family Cites Families (4)

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Publication number Priority date Publication date Assignee Title
US3598360A (en) * 1969-08-27 1971-08-10 Richdel Solenoid valve
DE3623554A1 (en) * 1986-07-12 1988-01-21 Pierburg Gmbh Electromagnetic, intermittent injection valve
DE3825135A1 (en) * 1988-07-23 1990-01-25 Bosch Gmbh Robert Electromagnetically actuable valve
DE3831196C2 (en) * 1988-09-14 1990-08-16 Robert Bosch Gmbh, 7000 Stuttgart, De

Also Published As

Publication number Publication date
KR100195822B1 (en) 1999-06-15
WO1991011605A3 (en) 1991-09-19
JP3262793B2 (en) 2002-03-04
US5330153A (en) 1994-07-19
EP0516632A1 (en) 1992-12-09
DE4003229A1 (en) 1991-08-08
JPH05504182A (en) 1993-07-01
WO1991011605A2 (en) 1991-08-08
RU2047034C1 (en) 1995-10-27
BR9105982A (en) 1992-11-10
ES2061230T3 (en) 1994-12-01

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