EP0054108B1 - Elektromagnetisch betätigbares Ventil, insbesondere Kraftstoffeinspritzventil für Kraftstoffeinspritzanlagen - Google Patents

Elektromagnetisch betätigbares Ventil, insbesondere Kraftstoffeinspritzventil für Kraftstoffeinspritzanlagen Download PDF

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Publication number
EP0054108B1
EP0054108B1 EP81107254A EP81107254A EP0054108B1 EP 0054108 B1 EP0054108 B1 EP 0054108B1 EP 81107254 A EP81107254 A EP 81107254A EP 81107254 A EP81107254 A EP 81107254A EP 0054108 B1 EP0054108 B1 EP 0054108B1
Authority
EP
European Patent Office
Prior art keywords
valve
core
valve according
guide
flat 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.)
Expired
Application number
EP81107254A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0054108A3 (en
EP0054108A2 (de
Inventor
Rudolf Krauss
Udo Hafner
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.)
OFFERTA DI LICENZA AL PUBBLICO
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 EP0054108A2 publication Critical patent/EP0054108A2/de
Publication of EP0054108A3 publication Critical patent/EP0054108A3/de
Application granted granted Critical
Publication of EP0054108B1 publication Critical patent/EP0054108B1/de
Expired 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
    • F02M51/00—Fuel-injection apparatus characterised by being operated electrically
    • F02M51/06—Injectors peculiar thereto with means directly operating the valve needle
    • F02M51/061—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means
    • F02M51/0625—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures
    • F02M51/0635—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a plate-shaped or undulated armature not entering the winding
    • F02M51/0642—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a plate-shaped or undulated armature not entering the winding the armature having a valve attached thereto
    • F02M51/0646—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a plate-shaped or undulated armature not entering the winding the armature having a valve attached thereto the valve being a short body, e.g. sphere or cube
    • F02M51/065—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a plate-shaped or undulated armature not entering the winding the armature having a valve attached thereto the valve being a short body, e.g. sphere or cube the valve being spherical or partly spherical
    • 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
    • F02M51/06—Injectors peculiar thereto with means directly operating the valve needle
    • F02M51/08—Injectors peculiar thereto with means directly operating the valve needle specially for low-pressure fuel-injection
    • 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
    • F02M2200/50—Arrangements of springs for valves used in fuel injectors or fuel injection pumps
    • F02M2200/505—Adjusting spring tension by sliding spring seats
    • 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
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S239/00—Fluid sprinkling, spraying, and diffusing
    • Y10S239/90—Electromagnetically actuated fuel injector having ball and seat type valve

Definitions

  • the invention relates to an electromagnetically actuated valve according to the preamble of the main claim.
  • An electromagnetically actuated valve is already known in which the armature is firmly connected to a guide membrane which is clamped on the outer circumference of the housing.
  • an additional operation is required to connect the anchor and the guide membrane, and the connection of the armature and the guide membrane in the guide membrane leads to stresses which lead to an inclination of the anchor relative to the core, which increases the risk there is that the anchor is not tightened in parallel.
  • the known design of the magnetic part for generating the desired magnetic forces requires a relatively large amount of space, which is contrary to a desired reduction in the size of the valve (cf. GB-A-2 058 466 Robert Bosch GmbH, not previously published).
  • valve according to the invention with the characterizing features of the main claim has the advantage over a low-friction and plane-parallel guidance of the flat armature with a small-sized design of the magnetic part and the avoidance of an additional operation and the inclined guidance of the armature due to stresses in the guide membrane.
  • the core is particularly advantageous to design the core as a shell core, the inner and outer core of which interact with one working area of the flat anchor.
  • valve part with a spherical section which interacts with the valve seat.
  • valve housing without cutting, e.g. to manufacture by deep drawing, rolling, etc. and to provide inlet openings and outlet openings offset against each other in the radial direction in its housing wall, via which unassigned fuel can flow out under heat absorption after flowing around the magnetic part.
  • FIG. 1 shows a first exemplary embodiment of an electromagnetically actuated fuel injection valve
  • FIG. 2 shows a second exemplary embodiment of an electromagnetically actuated fuel injection valve.
  • the fuel injection valve for a fuel injection system shown in FIGS. 1 and 2 is used, for example, to inject fuel, in particular with low pressure into the intake manifold of mixture-compressing, spark-ignited internal combustion engines.
  • 1 denotes a valve housing, which is formed by non-cutting shaping, for. B. deep drawing, rolling and the like is made and has a pot-shaped shape with a bottom 2, from which a tubular guide socket 3 is formed, which has a guide bore 4, which also penetrates the bottom 2 and opens into the interior 5 of the valve housing 1.
  • a shell core 7 made of ferromagnetic material is inserted, which has a smaller diameter than the interior 5 and bears with a collar 8 on an inner shoulder 9 of the valve housing 1.
  • a spacer ring 10 engages, which is adjoined by a guide membrane 11 and a nozzle carrier 12, a flanged edge 13 partially encompassing the end face of the nozzle carrier 12 and exerting an axial clamping force thereon, which fixes the position the shell core 7, the spacer ring 10, the guide membrane 11 and the nozzle carrier 12 guaranteed.
  • the shell core 7 e.g. a commercially available shell core (T 26 from Siemens) is used, which has an annular outer core 15 and an annular inner core 17 connected to it via a yoke 16.
  • a magnetic coil 18 is at least partially enclosed by an insulating carrier body 19 which is inserted with the magnetic coil 18 into the annular space of the shell core 7 formed between the outer core 15 and the inner core 17 and in a form-fitting manner, e.g. is connected to the yoke 16 by rivets 20 or a releasable snap connection.
  • the power supply to the magnetic coil 18 is advantageously carried out via contact pins 22, only one of which is shown, which is located in an insulation insert 23, e.g. Glass, are bordered, the insulation insert 23 may be surrounded by a mounting ring 24 which is inserted sealingly in a through hole 25 of the valve housing base 2 and for example soldered. With the contact pins 22, plug connections can be connected either in a manner not shown but known, or electrical cables.
  • a contact tab 26 is provided between the magnetic coil 18 and the contact pins 22 for length compensation in the case of thermal expansion.
  • a flat anchor 29 is arranged between the end face 28 of the shell core 7 facing away from the yoke 16 and the guide membrane 11.
  • a movable valve part 30 is connected to the flat anchor, for. B. soldered or welded.
  • the valve part 30 penetrates a central guide opening 31 in the guide membrane 11 and cooperates with a fixed valve seat 32 which is formed in a valve seat body 33.
  • the valve seat body 33 is inserted into the nozzle holder 12.
  • the valve part 30 and the flat armature 29 are guided through the central guide opening 31 of the guide membrane 11 in the radial direction on the one hand to the valve seat 32 and on the other hand to the end face 28 of the shell core 7.
  • the guide membrane 11 is not rigidly connected to the valve part 30 or to the flat anchor 29.
  • the flat anchor 29 can be designed as a stamped or pressed part and, for example, have an annular guide ring 34 facing the guide membrane 11, which on the one hand has the rigidity of the flat anchor 29 improved, secondly separates a first working area 36 of the flat armature, which is assigned to the end face of the outer core 15, from a second working area 37, which is assigned to the end face of the inner core 17, and thirdly forms a guide edge 35 which bears against the guide membrane 11, whereby the flat anchor 29 is guided parallel to the end face 28 of the shell core 7.
  • the valve part 30 has a spherical section 38 which interacts with the valve seat 32, for example, is flattened as a spherical zone.
  • the guiding membrane 11 is clamped between the spacer ring 10 and the nozzle carrier 12 in a plane which, when the valve part 30 rests against the valve seat 32, passes through the center M or as close as possible to the center M of the spherical section 38.
  • the guide diaphragm 11 bends under tension under tension against the guide edge 35 of the flat armature 29.
  • the valve part 30 is acted upon in the closing direction of the valve by a compression spring 39 which, on the other hand, projects into an inner bore 40 of the shell core 7 and is supported on a slide member 41.
  • the force of the compression spring 39 on the flat armature 29 and the valve part 30 can be influenced by axially displacing the slide member 41.
  • the slide member 41 is pressed into the guide bore 4 of the base 2 and guide connector 3 and has a section with notches 43 in the region of the guide connector, for example flat annular grooves, threads, knurls or the like, in order to better fix the slide member axially 41 to ensure that the guide socket 3 is pressed inward in the area of the notches 43, so that material of the guide socket 3 penetrates into the notches 43 of the slide member 41.
  • the end of the slide member 41 facing away from the flat anchor 29 is designed such that it ends within the guide stub 3 and has a pin 44 with a smaller diameter than the guide bore 4. A suitable tool can act on the pin 44 for displacing the slide member 41.
  • the slide member 41 has a longitudinal bore 45 which is open toward the flat armature 29 and, on the other hand, opens outside the shell core 7 in transverse bores 46 to the circumference of the slide member 41 in the interior 5 of the valve housing 1.
  • the valve part 30 has a cylindrical section 48 connected to the flat armature 29, to which the spherical section 38 of the valve part adjoins. Open toward the flat armature 29, the valve part 30 is provided with a concentric blind hole 49 which leads as far as possible into the spherical section 38.
  • the compression spring 39 which is in contact with the slide member 41, passes through an opening 50 of the flat armature and, on the other hand, is supported in the valve part 30 at the base 51 of the blind hole 49, so that when the magnet part 7, 18, 29 is not excited, the valve part 30 counteracts the spring force of the guide membrane 11 is held sealingly on the valve seat 32.
  • Cross bores 52 extend from the circumference of the valve part 30 to the blind bore 49.
  • a collecting space 54 is formed downstream of the valve seat 32, the volume of which should be as small as possible and which is delimited by the valve seat body 33, the spherical section 38 and a swirl body 55 arranged downstream of the valve seat body 33.
  • a flange 56 of the nozzle carrier 12 engages around a surface of the swirl body 55 facing away from the valve seat body 33, as a result of which the valve seat body 33 and the swirl body 55 are fixed in their position.
  • the swirl body 55 has a projection 57 protruding into the collecting space 54, the end face of which is flattened facing the valve part 30 and from whose lateral, for example conical circumferential wall 58 branch off to the swirl channels 59 which open towards the collecting chamber 54 and which, in a known manner, incline at an angle to the valve axis can be and open into a swirl chamber 60.
  • the swirl channels 59 can open tangentially into the swirl chamber 60 and are used for metering the fuel.
  • the fuel film formed on the wall of the swirl chamber 60 tears off at the sharp end of the swirl chamber 60, which opens into the intake manifold, and thus enters conically into the air flow of the intake manifold, which ensures that the fuel is well conditioned, particularly at low fuel pressures.
  • the fuel injection valve mounted in a holding body 62 can be fixed in its position, for example, by a claw or a cover 63 and has a first annular groove 64 in the valve housing 1 and offset in the axial direction and sealed off from the first annular groove 64, and a second annular groove 65 seals it.
  • a fuel inflow line 66 is formed, which opens into the first annular groove 64.
  • a fuel return flow line 67 is formed in the holding body 62, which is connected to the second annular groove 65.
  • Radial inflow openings 68 in the wall of the cylindrical, tubular part of the valve housing 1 connect the first annular groove 64 to a flow channel 69 which is formed between the outer core 15 and the inner wall of the valve housing 1.
  • the part of the interior lying above the shell core 7 space 5 communicates with the second annular groove 65 via radial outlet openings 70 formed in the cylindrical, tubular part of the valve housing and is separated from the flow channel 69 by a sealing body 71.
  • the guide membrane 11 has flow openings 73, as 29 flow openings 74 can also be formed in the flat armature.
  • the fuel flowing into the flow channel 69 via the inflow openings 68 can flow via openings 75 in the collar 8 and the throughflow openings 73 in the guide membrane 11 to the valve seat 32, from where it reaches the collecting space 54 when the valve part 30 is lifted off the valve seat 32 and there via the Swirl channels 59 is metered.
  • the unmeasured part of the fuel can flow via the transverse bores 52 into the blind bore 49 of the valve part 30 and from there via the inner bore 40 or the longitudinal bore 45 of the slide member 41 and the transverse bores 46 into the part of the interior 5 above the shell core 7 with the receptacle of the heat generated on the magnetic part and flow from there via the drain openings 70 and the second annular groove 65 into the fuel return line 67.
  • the parts that remain the same and function the same as in FIG. 1 are identified by the same reference numerals.
  • the flat armature 29 with the valve part 30 has the same design and is guided through a guide membrane 11 in the same way as in the exemplary embodiment according to FIG. 1. This area of the fuel injection valve was therefore not shown again in section.
  • the slide member 41 has on its side facing the flat armature a portion 78 projecting partially into the shell core 7, which has a smaller diameter than the inner bore 40 of the shell core and between and the inner bore 40 of the Shell core 7, an annular channel 79 is formed, via which the unassigned fuel can flow from the magnetic part into the part of the interior 5 above the shell core 7 while absorbing heat.
  • the compression spring 39 is supported on the section 78 of the slide member 41 with its end facing away from the flat anchor.
  • the sealing of the contact pin 22 in the through hole 25 of the housing base 2 can be done by a sealing ring 80.
  • the contact pins 22 and the guide stub 3 can be enclosed by a cap 81 made of insulating and elastic material such as rubber or plastic, which has latching elements 82 which snap into place on the guide stub 3 and from which the contact pins 22 protrude.

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)
  • Magnetically Actuated Valves (AREA)
  • Fuel-Injection Apparatus (AREA)
EP81107254A 1980-12-12 1981-09-15 Elektromagnetisch betätigbares Ventil, insbesondere Kraftstoffeinspritzventil für Kraftstoffeinspritzanlagen Expired EP0054108B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3046889 1980-12-12
DE19803046889 DE3046889A1 (de) 1980-12-12 1980-12-12 Elektromagnetisch betaetigbares ventil, insbesondere kraftstoffeinspritzventil fuer kraftstoffeinspritzanlagen

Publications (3)

Publication Number Publication Date
EP0054108A2 EP0054108A2 (de) 1982-06-23
EP0054108A3 EP0054108A3 (en) 1983-10-05
EP0054108B1 true EP0054108B1 (de) 1986-01-29

Family

ID=6119024

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81107254A Expired EP0054108B1 (de) 1980-12-12 1981-09-15 Elektromagnetisch betätigbares Ventil, insbesondere Kraftstoffeinspritzventil für Kraftstoffeinspritzanlagen

Country Status (6)

Country Link
US (1) US4416423A (enrdf_load_stackoverflow)
EP (1) EP0054108B1 (enrdf_load_stackoverflow)
JP (2) JPS57124174A (enrdf_load_stackoverflow)
AU (1) AU547198B2 (enrdf_load_stackoverflow)
BR (1) BR8108053A (enrdf_load_stackoverflow)
DE (2) DE3046889A1 (enrdf_load_stackoverflow)

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3116954C2 (de) * 1981-04-29 1993-10-21 Bosch Gmbh Robert Kraftstoffeinspritzventil für Brennkraftmaschinen
DE3118898A1 (de) * 1981-05-13 1982-12-02 Robert Bosch Gmbh, 7000 Stuttgart Elektromagnetisch betaetigbares ventil, insbesondere kraftstoffeinspritzventil fuer kraftstoffeinspritzanlagen
DE3120160A1 (de) * 1981-05-21 1982-12-09 Robert Bosch Gmbh, 7000 Stuttgart Elektromagnetisch betaetigbares ventil, insbesondere kraftstoffeinspritzventil fuer kraftstoffeinspritzan lagen
DE3121572A1 (de) * 1981-05-30 1982-12-16 Robert Bosch Gmbh, 7000 Stuttgart "einspritzventil"
DE3143848A1 (de) * 1981-11-05 1983-05-11 Robert Bosch Gmbh, 7000 Stuttgart Elektromagnetisch betaetigbares ventil, insbesondere kraftstoffeinspritzventil
DE3207918A1 (de) * 1982-03-05 1983-09-15 Robert Bosch Gmbh, 7000 Stuttgart Elektromagnetisch betaetigbares ventil
DE3229716C2 (de) * 1982-08-10 1995-01-26 Bosch Gmbh Robert Kraftstoffeinspritzvorrichtung
DE3230844A1 (de) * 1982-08-19 1984-02-23 Robert Bosch Gmbh, 7000 Stuttgart Elektromagnetisch betaetigbares ventil
JPS59203866A (ja) * 1983-05-04 1984-11-19 Nippon Denso Co Ltd 電磁式燃料噴射弁
JPS611860A (ja) * 1984-06-15 1986-01-07 Automob Antipollut & Saf Res Center 電磁式燃料噴射弁の組立方法
DE3502410A1 (de) * 1985-01-25 1986-07-31 Robert Bosch Gmbh, 7000 Stuttgart Elektromagnetisch betaetigbares kraftstoffeinspritzventil
US4951878A (en) * 1987-11-16 1990-08-28 Casey Gary L Pico fuel injector valve
IT1219397B (it) * 1988-06-23 1990-05-11 Weber Srl Valvola per la dosatura e la polverizzazione di carburante ad azionamento elettromagnetico provvista di doppia serie di fori laterali di ingresso del carburante
JPH08210217A (ja) * 1995-02-03 1996-08-20 Zexel Corp 電磁式燃料噴射弁
US5791531A (en) * 1996-04-12 1998-08-11 Nordson Corporation High speed fluid dispenser having electromechanical valve
US6938840B1 (en) 1998-08-27 2005-09-06 Robert Bosch Gmbh Fuel injection valve
US6776353B2 (en) 2001-12-17 2004-08-17 Siemens Vdo Automotive Corporation Fuel injector valve seat assembly with radially outward leading fuel flow passages feeding multi-hole orifice disk
JP2007064364A (ja) * 2005-08-31 2007-03-15 Denso Corp 電磁弁
US12098778B2 (en) * 2019-08-29 2024-09-24 Eagle Industry Co., Ltd. Solenoid valve

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2130666A (en) * 1932-01-28 1938-09-20 Carter Carburetor Corp Fuel supply device for internal combustion engines
US3001757A (en) * 1958-04-09 1961-09-26 Chrysler Corp Magnetic fuel injection nozzle
DE1601395A1 (de) * 1968-01-30 1970-10-29 Bosch Gmbh Robert Elektromagnetisch betaetigtes Einspritzventil
GB1231631A (enrdf_load_stackoverflow) * 1968-04-02 1971-05-12
DE2035248C3 (de) * 1970-07-16 1978-11-09 Messerschmitt-Boelkow-Blohm Gmbh, 8000 Muenchen Elektrofluidische Schaltvorrichtung mit einer frei beweglichen Folie in einer Kammer
JPS474460U (enrdf_load_stackoverflow) * 1971-02-04 1972-09-11
DE2246574A1 (de) * 1972-09-22 1974-03-28 Bosch Gmbh Robert Membranmagnetventil
DE2246476A1 (de) * 1972-09-22 1974-04-04 Bosch Gmbh Robert Druckregler fuer stroemende medien
DE2501283A1 (de) * 1975-01-15 1976-07-22 Bosch Gmbh Robert Einspritzventil
US4196751A (en) * 1976-01-15 1980-04-08 Johnson Controls, Inc. Electric to fluid signal valve unit
DE2739085A1 (de) * 1977-08-30 1979-03-08 Technologieforschung Gmbh Magnetventil
DE2936425A1 (de) * 1979-09-08 1981-04-02 Robert Bosch Gmbh, 7000 Stuttgart Elektromagnetisch betaetigbares kraftsoffeinspritzventil
DE2936853A1 (de) * 1979-09-12 1981-04-02 Robert Bosch Gmbh, 7000 Stuttgart Elektromagnetisch betaetigbares ventil
US4310123A (en) * 1980-07-21 1982-01-12 General Motors Corporation Electromagnetic fuel injector with adjustable armature spring

Also Published As

Publication number Publication date
EP0054108A3 (en) 1983-10-05
AU7686781A (en) 1982-06-17
DE3173633D1 (en) 1986-03-13
JPS57124174A (en) 1982-08-02
JPH0226113B2 (enrdf_load_stackoverflow) 1990-06-07
DE3046889A1 (de) 1982-07-15
AU547198B2 (en) 1985-10-10
EP0054108A2 (de) 1982-06-23
BR8108053A (pt) 1982-09-21
US4416423A (en) 1983-11-22
DE3046889C2 (enrdf_load_stackoverflow) 1988-06-01
JPH02256980A (ja) 1990-10-17

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