EP0525377B1 - Ventil - Google Patents

Ventil Download PDF

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Publication number
EP0525377B1
EP0525377B1 EP92110524A EP92110524A EP0525377B1 EP 0525377 B1 EP0525377 B1 EP 0525377B1 EP 92110524 A EP92110524 A EP 92110524A EP 92110524 A EP92110524 A EP 92110524A EP 0525377 B1 EP0525377 B1 EP 0525377B1
Authority
EP
European Patent Office
Prior art keywords
spring
valve
return spring
chamber opening
area
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
EP92110524A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0525377A1 (de
Inventor
Ferdinand Dipl.-Ing. Reiter
Martin Dr. Dipl.-Ing. Maier
Alwin Stegmaier
Kenneth Tanski
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 EP0525377A1 publication Critical patent/EP0525377A1/de
Application granted granted Critical
Publication of EP0525377B1 publication Critical patent/EP0525377B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • 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
    • 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
    • F02M51/0614—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of electromagnets or fixed armature
    • 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
    • F02M51/0664—Injectors 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
    • F02M51/0671—Injectors 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
    • F02M51/0682—Injectors 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
    • F02M61/168—Assembling; Disassembling; Manufacturing; Adjusting
    • 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
    • F02M61/165—Filtering elements specially adapted in fuel inlets to injector

Definitions

  • the invention relates to a valve according to the preamble of the main claim.
  • a valve is already known, in which an adjusting sleeve is pressed into a spring chamber opening, on which a return spring acting on the valve closing part is supported and the pressing depth of which in the spring chamber opening determines the spring force of the return spring.
  • the adjusting sleeve is pressed in, there is a risk of chip formation on the adjusting sleeve and on the wall of the spring chamber opening, so that the valve can be contaminated and damaged by the metal chips.
  • the valve according to the invention with the characterizing features of the main claim has the advantage that the adjusting sleeve, which serves to support and adjust the spring force of the return spring, can be dispensed with. In this way, the risk of chip formation when pressing in the adjusting sleeve is prevented. In addition, the manufacturing costs of the valve can be significantly reduced.
  • the return spring By pressing in the return spring, the return spring is prevented from rotating about its longitudinal axis during operation of the valve, and wear on the spring end of the return spring facing the valve closing part and on the end face adjacent to this spring end, e.g. a valve needle minimized.
  • the return spring is designed as a helical spring made of a spring steel wire, so that the return spring can be produced very easily and inexpensively and can be installed in the spring chamber opening.
  • the self-locking of the return spring which is designed as a helical spring and is pressed into the spring chamber opening, effectively prevents displacement of the return spring, so that a constant spring force of the return spring is ensured during operation of the valve. If the spring steel wire has a round cross-section, chip formation is particularly effectively avoided when the return spring is pressed into the spring chamber opening.
  • the return spring has at one end facing away from the valve needle an end of the spring steel wire pointing inwards in the radial direction.
  • Such a return spring can be mounted under axial pressure by turning in the direction of the turn in the spring chamber opening, the outer diameter of the return spring constricting and thus facilitating assembly without the risk of chip formation due to a contact with the wall of the spring chamber opening and with respect to it in Circumferential direction moving wire end.
  • FIG. 1 shows a valve according to a first exemplary embodiment according to the invention
  • FIG. 2 shows a return spring according to the first exemplary embodiment
  • FIG. 3 shows a view of the return spring of the first exemplary embodiment in the direction of the arrow X in FIG. 2
  • FIG. 4 shows a return spring according to a second exemplary embodiment according to the invention
  • FIG 5 shows a view of the return spring according to the second exemplary embodiment in the direction of the arrow Y in FIG. 4
  • FIG. 6 shows a return spring according to a third exemplary embodiment according to the invention.
  • FIG. 1 shows, for example, an electromagnetically actuated fuel injection valve for fuel injection systems of mixture-compressing spark-ignition internal combustion engines.
  • the fuel injector has a tubular inner pole 3, which is surrounded by a magnet coil 1 and serves as a fuel inlet connection.
  • the magnet coil 1 has a coil body 5 stepped in the radial direction with a winding 7 stepped in the radial direction and, in conjunction with the inner pole 3 having a constant outer diameter, enables one particularly compact design of the fuel injector.
  • a tubular intermediate part 13 is connected to a lower pole end 9 of the inner pole 3 concentrically with a valve longitudinal axis 11, for example by welding, and in this case partially surrounds the pole end 9 axially with an upper cylinder section 15.
  • the stepped coil former 5 partially overlaps the inner pole 3 and, with a step 17 of larger diameter, the upper cylinder section 15 of the intermediate part 13.
  • the intermediate part 13 is provided at its end facing away from the inner pole 3 with a lower cylinder section 19 which engages over a tubular nozzle holder 21 and is connected to it, for example by welding.
  • a cylindrical valve seat body 25 is tightly mounted by welding in a through opening 23 running concentrically to the valve longitudinal axis 11.
  • the valve seat body 25 has a fixed valve seat 27 facing the magnet coil 1, downstream of which, for example, two spray openings 29 are formed in the valve seat body 25. Downstream of the spray openings 29, for example, a treatment bore 31 is formed in the valve seat body 25 which widens in the shape of a truncated cone in the direction of flow.
  • the fixed valve seat 27 acts with a e.g. spherical valve closing part 33 together, which serves to open and close the valve.
  • the valve closing part 33 is connected with its end facing away from the fixed valve seat 27 to a tubular valve needle 35, for example by welding.
  • the valve needle 35 is provided with a tubular armature 37 e.g. connected by welding.
  • the armature 37 is guided on its circumference, for example, by a guide collar 39 of the intermediate part 13.
  • a return spring 43 which extends, for example, in the region of the pole end 9, is pressed into a continuous, stepped spring chamber opening 41 of the tubular inner pole 3, which runs concentrically to the valve longitudinal axis 11 and serves to supply the fuel in the direction of the valve seat 27.
  • the return spring 43 is designed, for example, as a helical spring made of, for example, a wire having a circular cross section. The circular cross section of the wire prevents chip formation when the return spring 43 is pressed in on the return spring and on the wall of the spring chamber opening 41.
  • the return spring 43 can be formed, for example, from a brass wire, from a spring steel wire or from any other wire.
  • the restoring spring 43 rests with a tension acting in the radial direction on the wall of the spring chamber opening 41. Due to the self-locking of the holding turns 45 of the pressed-in, designed as a helical return spring 43 this is held in the spring chamber opening 41 without the risk of displacement of the return spring 43 in the spring chamber opening 41 in the direction of the valve longitudinal axis 11.
  • the return spring 43 rests with its spring end face 46 facing the fixed valve seat 27 against an end face 47 of the valve needle 35 facing away from the valve closing part 33 and endeavors to move the valve closing part 33 in the direction of the fixed valve seat 27.
  • the press-in depth of the return spring 43 into the spring chamber opening 41 of the inner pole 3 determines the spring force of the return spring 43 and thus also influences the dynamic fuel quantity emitted during the opening and closing stroke of the valve.
  • the return spring 43 By pressing the return spring 43 into the spring chamber opening 41 of the inner pole 3, the return spring 43 is prevented from rotating about its longitudinal axis during operation of the valve and thus the wear and chip formation on the end face 47 of the valve needle 35 and on the spring end face resting on the end face 47 46 of the return spring 43 minimized.
  • a fuel filter 49 is arranged in the stepped spring chamber opening 41 of the inner pole 3 upstream of the return spring 43 in the direction facing away from the pole end 9.
  • the magnetic coil 1 is at least a guiding element 51, for example designed as a bracket and serving as a ferromagnetic element, which at least partially surrounds the magnetic coil 1 in the circumferential direction and rests with its one end on the inner pole 3 and with its other end on the nozzle holder 21 and with these, for example by welding or Soldering is connected.
  • a part of the fuel injector is enclosed by a plastic sheath 53, which extends from the inner pole 3 in the axial direction over the magnet coil 1 and the at least one guide element 51 and to which an electrical connector 55 is also molded.
  • the return spring 43 according to the first exemplary embodiment shown in FIG. 1 is shown in FIGS. 2 and 3, FIG. 3 showing a view of the return spring in the direction of the arrow X in FIG. 2.
  • the return spring 43 has at its end 59 facing away from the spring end face 46, for example, three holding windings 45 which have a larger outer diameter than the diameter of the spring chamber opening 41 of the inner pole 3 and form a cylindrical clamping region 57.
  • Active spring windings 61 are connected to the holding windings 45 facing the spring end face 46 of the return spring 43. If the return spring 43, as shown in FIG. 1, is mounted in a valve, its active spring windings 61 exert a spring force on the valve closing part 33 in the direction of the valve seat 27.
  • the spring windings 61 have a smaller outer diameter than the diameter of the spring chamber opening 41 of the inner pole 3 and form a cylindrical active spring region 62.
  • the wire section has a wire end 63 at the two ends of the return spring 43, which is bent in the circumferential direction and partially ground off at least on the spring side 46, so that there is a flat spring end face 46.
  • FIGS. 4 and 5 A return spring according to a second exemplary embodiment according to the invention is shown in FIGS. 4 and 5, FIG. 5 showing a view of the return spring 43 in the direction of the arrow Y in FIG.
  • the return spring 43 formed from a wire section has at its end 59 e.g. three holding turns 45, which have a larger outer diameter than the diameter of the spring chamber opening 41 and together form a cylindrical clamping region 57.
  • Active spring windings 61 which have a smaller outer diameter than the diameter of the spring chamber opening 41 and form an active cylindrical spring region 62, adjoin the holding windings 45 facing the spring end face 46.
  • the return spring 43 according to the second exemplary embodiment has a different winding direction and, at its end 59 facing away from the spring end face 46, a wire end 63 pointing inwards in the radial direction.
  • This inward-pointing wire end 63 enables the return spring 43 into the spring chamber opening 41 by rotating in the direction of the winding about its own axis, a force being applied in the direction facing the valve needle 35.
  • the outer diameter of the holding turns 45 constricts and thus facilitates the assembly of the return spring 43 in the spring chamber opening 41 of the inner pole 3.
  • the inward-pointing wire end 63 increases the risk of chip formation due to a contact with the wall of the spring chamber opening 41 and with the Assembly in the circumferential direction against the wall moving wire end prevented.
  • FIG. 6 shows a return spring 43 according to a third exemplary embodiment according to the invention.
  • the return spring 43 which has the form of a helical spring formed from a wire, for example five holding turns 45 which have a larger outer diameter than the diameter of the spring chamber opening 41 of the inner pole 3 and which together form a cylindrical clamping region 57 with which the return spring 43 is held by pressing in the spring chamber opening 41 of a valve.
  • the return spring 43 facing the spring end 46 has a plurality of active spring windings 61, which form a cylindrical active spring region 62, the outer diameter of which is smaller than the diameter of the spring chamber opening 41.
  • a conical transition region 65 provided with transition turns 67.
  • the return spring 43 is mounted in a valve, for example shown in FIG. 1, the active spring windings 61, together with the transition windings 67, exert a spring force directed in the direction of the valve seat 27 on the valve needle 35 and thus on the valve closing part 33.
  • the return spring 43 pressed into the spring chamber opening 41 of the valve makes it possible to dispense with the adjusting sleeve and thus to reduce the manufacturing costs of the valve. In addition, the risk of chip formation during the press-in process is avoided.

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)
  • Manufacturing & Machinery (AREA)
  • Fuel-Injection Apparatus (AREA)
  • Magnetically Actuated Valves (AREA)
EP92110524A 1991-07-30 1992-06-23 Ventil Expired - Lifetime EP0525377B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4125155 1991-07-30
DE4125155A DE4125155C1 (enrdf_load_stackoverflow) 1991-07-30 1991-07-30

Publications (2)

Publication Number Publication Date
EP0525377A1 EP0525377A1 (de) 1993-02-03
EP0525377B1 true EP0525377B1 (de) 1995-09-13

Family

ID=6437284

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92110524A Expired - Lifetime EP0525377B1 (de) 1991-07-30 1992-06-23 Ventil

Country Status (4)

Country Link
US (1) US5217204A (enrdf_load_stackoverflow)
EP (1) EP0525377B1 (enrdf_load_stackoverflow)
JP (1) JP3162492B2 (enrdf_load_stackoverflow)
DE (2) DE4125155C1 (enrdf_load_stackoverflow)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4230641A1 (de) * 1992-09-12 1994-03-17 Bosch Gmbh Robert Kraftstoff-Einspritzdüse mit Additiveinspritzung für Dieselmotoren
US5494223A (en) * 1994-08-18 1996-02-27 Siemens Automotive L.P. Fuel injector having improved parallelism of impacting armature surface to impacted stop surface
US5465910A (en) * 1994-08-18 1995-11-14 Siemens Automotive Corporation Overmolded cover for fuel injector power group and method
US5462231A (en) * 1994-08-18 1995-10-31 Siemens Automotive L.P. Coil for small diameter welded fuel injector
JP2000018125A (ja) * 1998-07-01 2000-01-18 Mitsubishi Electric Corp 筒内噴射用燃料噴射弁
DE19927898A1 (de) 1999-06-18 2000-12-21 Bosch Gmbh Robert Brennstoffeinspritzventil
DE10039077A1 (de) * 2000-08-10 2002-02-21 Bosch Gmbh Robert Brennstoffeinspritzventil
DE10048597A1 (de) * 2000-09-30 2002-04-11 Bosch Gmbh Robert Kraftstoffeinspritzventil für Brennkraftmaschinen
JP3799599B2 (ja) * 2001-02-26 2006-07-19 株式会社デンソー 溶接装置および溶接方法
US6928986B2 (en) * 2003-12-29 2005-08-16 Siemens Diesel Systems Technology Vdo Fuel injector with piezoelectric actuator and method of use
DE102004025079A1 (de) * 2004-05-21 2005-12-08 Robert Bosch Gmbh Brennstoffeinspritzventil
DE102004054241A1 (de) * 2004-11-10 2006-05-11 Robert Bosch Gmbh Brennstoffeinspritzventil
JP4619266B2 (ja) 2005-10-31 2011-01-26 トヨタ紡織株式会社 自動車用高張力鋼板のプレス加工用の潤滑油
DE102009000185A1 (de) * 2009-01-13 2010-07-15 Robert Bosch Gmbh Vorrichtung zur Einspritzung von Kraftstoff
JP2010121636A (ja) * 2010-03-12 2010-06-03 Mitsubishi Electric Corp 燃料噴射装置
US11591994B2 (en) * 2017-11-22 2023-02-28 Hitachi Astemo, Ltd. Fuel injection device

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DE86323C (enrdf_load_stackoverflow) *
GB258483A (en) * 1926-02-26 1926-09-23 Edwin Barnes Improvements in or relating to coiled springs
US1775999A (en) * 1929-09-18 1930-09-16 Haseloff Otto Self-adjustable valve
US2289310A (en) * 1940-11-22 1942-07-07 Ass Of American Railroads Paint gun
DE831629C (de) * 1948-10-02 1952-02-14 Concordia Maschinen U Elek Zit Ventil
US3001546A (en) * 1958-10-06 1961-09-26 Clifford A Salisbury Check valve
AT245873B (de) * 1960-07-21 1966-03-25 Math & Metrik Inc Dämpfungsvorrichtung
DE1263396B (de) * 1966-04-20 1968-03-14 Philips Patentverwaltung Magnetventil fuer eine Brennstoffeinspritzanlage fuer Brennkraftmaschinen
US3647177A (en) * 1969-06-04 1972-03-07 Gregor L Lang Alternating current solenoids
US3731880A (en) * 1971-10-08 1973-05-08 Gen Motors Corp Ball valve electromagnetic fuel injector
US3800825A (en) * 1972-03-23 1974-04-02 Bio Res Labor Ltd Liquid dispensing valve
FR2384166A1 (fr) * 1977-03-16 1978-10-13 Schmitthelm Fa Ernst Ressort de vehicule a moteur utilisable en tant que ressort de commande de deplacement et en tant que ressort de soupape
FR2410183A1 (fr) * 1977-11-23 1979-06-22 Normandie Atel Metallurg Meca Ressort pour assemblage de tubes
DE3825135A1 (de) * 1988-07-23 1990-01-25 Bosch Gmbh Robert Elektromagnetisch betaetigbares ventil
DE3831196A1 (de) * 1988-09-14 1990-03-22 Bosch Gmbh Robert Elektromagnetisch betaetigbares ventil
DE3843862A1 (de) * 1988-12-24 1990-06-28 Bosch Gmbh Robert Elektromagnetisch betaetigbares ventil
JPH0320131A (ja) * 1989-06-16 1991-01-29 Nhk Spring Co Ltd ばね装置
DE4003227C1 (en) * 1990-02-03 1991-01-03 Robert Bosch Gmbh, 7000 Stuttgart, De EM fuel injection valve for IC engine - has two overlapping parts welded together as narrowed section of one part
US5104091A (en) * 1991-05-14 1992-04-14 United Technologies Corporation Spring assisted ball valve

Also Published As

Publication number Publication date
DE4125155C1 (enrdf_load_stackoverflow) 1993-02-04
DE59203652D1 (de) 1995-10-19
JP3162492B2 (ja) 2001-04-25
US5217204A (en) 1993-06-08
JPH05196164A (ja) 1993-08-06
EP0525377A1 (de) 1993-02-03

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