EP0685643B1 - Pointeau pour une soupape à commande électromagnétique - Google Patents

Pointeau pour une soupape à commande électromagnétique Download PDF

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Publication number
EP0685643B1
EP0685643B1 EP95105247A EP95105247A EP0685643B1 EP 0685643 B1 EP0685643 B1 EP 0685643B1 EP 95105247 A EP95105247 A EP 95105247A EP 95105247 A EP95105247 A EP 95105247A EP 0685643 B1 EP0685643 B1 EP 0685643B1
Authority
EP
European Patent Office
Prior art keywords
valve
needle
section
armature
closing member
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
EP95105247A
Other languages
German (de)
English (en)
Other versions
EP0685643A2 (fr
EP0685643A3 (fr
Inventor
Bernhard Dipl.-Ing. Just
Ferdinand Dipl.-Ing. Reiter (Ba)
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 EP0685643A2 publication Critical patent/EP0685643A2/fr
Publication of EP0685643A3 publication Critical patent/EP0685643A3/fr
Application granted granted Critical
Publication of EP0685643B1 publication Critical patent/EP0685643B1/fr
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
    • F02M61/168—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
    • 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
    • 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
    • F02M2200/80—Fuel injection apparatus manufacture, repair or assembly
    • F02M2200/8046—Fuel injection apparatus manufacture, repair or assembly the manufacture involving injection moulding, e.g. of plastic or metal
    • 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 is based on a valve needle for electromagnetically actuated valve according to the genus of Main claim.
  • a Valve needle for an electromagnetically actuated valve known from an anchor section, a Valve closing member section and one with the armature section tubular connecting the valve closing member portion Valve sleeve section exists.
  • the individual sections represent separately manufactured individual parts that can only be connected with each other using joining processes.
  • valve needle for a Electromagnetically actuated valve known from a Anchor section, a valve closing member section and one the armature section with the valve closing member section connecting valve sleeve section.
  • the Anchor section is at one end of the valve sleeve section by means of a first welded joint and the Valve closing section with the other end of the Valve sleeve section by means of a second Welded joint connected.
  • To manufacture the valve needle So two welding operations are required a relatively complex and expensive manufacture of Guide the valve needle.
  • valve needles for electromagnetically actuated Valves are known in which a valve needle stem by application a joining process is firmly connected to an anchor.
  • the Valve needles are all constructed in such a way that an annular Anchor with an internal through hole on an upper end of the Valve needle shaft is pressed. In at least one area the valve needle stem lies through grooves, bores or others Formations spaced from the anchor, so that at least one Flow channel is formed by the armature.
  • DE 42 30 376 C discloses a Valve needle for an electromagnetically actuated valve from a one-piece, from an anchor section and one Valve sleeve section existing tubular Actuating part by injection molding and subsequent Sintering using the metal injection molding (MIM) process to manufacture. Then the actuator is by means of a welded joint with a Valve closure member section connected.
  • MIM metal injection molding
  • the anchor section and Valve sleeve section is a continuous inner Longitudinal opening provided in the fuel towards Valve closing section can flow, which is then close to the Valve closing member section through transverse openings from the Valve sleeve section emerges.
  • valve needle according to the invention with the In contrast, features of claim 1 have the advantage that they are particularly simple and inexpensive and Way is producible.
  • At least two axially Flow channels inside the anchor section provide for an unimpeded flow of fuel towards the Valve seat.
  • the one emerging from the flow channels Fuel can be on the outer periphery of the valve needle section flow along without diversions.
  • valve needle arises if it with the anchor section, the Valve needle section and the valve closing member section as a molded part according to the metal injection molding process is made.
  • FIG. 1 shows it Fuel injection valve with an inventive 2 shows a top view of the valve needle, 3 shows a section along the line III-III in FIG and FIG. 4 shows a section along the line IV-IV in FIG 2nd
  • the solenoid 1 with a bobbin 3 is z. B. with a Plastic extrusion 5 provided, at the same time a electrical connector 6 is molded.
  • a tubular, metal intermediate part 12 for example by welding connected and partially overlaps the core end 10 axially.
  • the intermediate part 12 is at its core 2 facing away End provided with a lower cylinder section 18, the overlaps a tubular nozzle carrier 19 and with this for example, is tightly connected by welding.
  • a cylindrical valve seat body 21 tightly assembled by welding.
  • the valve seat body 21 has a fixed valve seat 22 facing the magnet coil 1 on, downstream of which in the valve seat body 21 z.
  • B. two Spray openings 23 are formed. Downstream of the Spray openings 23, the valve seat body 21 has itself widening in the shape of a truncated cone in the direction of flow Conditioning hole 24.
  • stepped flow bore 25 of the core 2 is for Setting the spring force of a return spring 26 a tubular adjusting bush 27 pressed.
  • the press-in depth the adjusting bush 27 into the flow bore 25 of the core 2 determines the spring force of the return spring 26 and influences thus also the dynamic, during the opening and the Closing stroke of the valve delivered amount of fuel.
  • the actuating part 32 is part of a valve needle 34 and consists itself of a core 2 facing and with the Core 2 and the magnetic coil 1 interacting Anchor section 36 and a valve seat body 21 facing, massively trained Valve needle section 38. Together with an am downstream end of valve needle portion 38 arranged, e.g. spherical valve closing member section 46, the actuating part 32 forms the valve needle 34 spherical valve closing member section 46 is present for example by means of one obtained by laser welding Welded connection 48 with the actuating part 32 and tightly connected.
  • valve needle section 38 of the actuator 32 at its downstream end facing away from the holding heel 30 an end face, e.g. conical or spherical dome-shaped formed contact surface 49.
  • the valve needle section 38 and valve closure member portion 46 typically have a smaller diameter than the anchor portion 36.
  • the for example spherical valve closure member section 46 has z. B. four circular flats 50 on the flow of fuel towards the Lighten the valve seat 22 of the valve seat body 21. Based of Figures 2 to 4, the actuating part 32 is below explained in more detail.
  • the magnet coil 1 is of at least one, for example trained as a bracket, as a ferromagnetic element serving guiding element 40 at least partially surround the with one end on core 2 and the other End rests on the nozzle holder 19 and z. B. is connected by welding or soldering. Part of the Valve is enclosed by a plastic casing 41, starting from the core 2 in the axial direction over the Solenoid 1 with connector 6 and the at least one Guide element 40 extends.
  • the already known and also as metal injection molding (MIM) designated process includes the production of molded parts from a metal powder with a binder, e.g. B. one Plastic binders, for example on conventional ones Plastic injection molding machines and the subsequent removal of the binder and sintering the remaining Metal powder structure.
  • MIM metal injection molding
  • the composition of the metal powder can easily be optimal magnetic Properties of the anchor section 36 and Valve needle section 38 existing actuator 32 or of the valve closing member section 46 can be matched.
  • FIG. 1 illustrated embodiment An actuating part 32 according to that in FIG. 1 illustrated embodiment is also in the Figures 2 to 4 shown.
  • Figure 2 shows one Top view of the actuator 32 or Anchor section 36 from an upstream core 2 facing end face 53.
  • This top view is good to recognize that the axially opposite the end face 53rd deeper and a smaller diameter than that End face 53 having retaining heel 30 for supporting the Return spring 26 by, for example, three or four axially, thus extending in the direction of the valve longitudinal axis 11
  • Axialnuten 55 is interrupted.
  • the return spring 26 is located consequently only on the ring between the axial grooves 55 remaining areas of the holding heel 30.
  • the Axial grooves 55 extend over the entire remaining one Length of the anchor portion 36 and serve the from the Flow bore 25 of the core 2 coming fuel to flow freely to the valve seat 22.
  • FIG. 3 and 4 are representations of sections along of lines III-III and IV-IV in FIG. 2, with FIG. 3 shows a section through the massive material from Holding paragraph 30 starting in the axial direction of the Anchor section 36 runs, and Figure 4 shows a section illustrated by two axial grooves 55 in the armature section 36.
  • a central inner pocket hole-like recess 57 extends for example with the same diameter like the massive valve needle section 38 from the holding shoulder 30 starting in the anchor section 36 downstream to one of the Contact surface 49 opposite end face 56 of the Valve needle section 38 and stands with the axial grooves 55 directly in connection.
  • the valve needle section 38 protrudes partially into the anchor portion 36, i.e. H.
  • the upstream end face facing the holding shoulder 30 56 of the valve needle section 38 lies further upstream as one on the outer contour of the actuating part 32 resulting paragraph 58 of anchor portion 36 to Valve needle section 38 at which the axial grooves 55 end.
  • the Axial grooves 55 in their lower section, namely exactly from the end face 56 of the Valve needle section 38 no longer represents grooves, but through the complete material enclosure is in alignment subsequent axial flow channels 60.
  • the fuel emerges from the flow channels 60 in the region of the shoulder 58 at least partially as a wall film of the valve needle section 38 because the inner boundary of each flow channel 60 is given by the valve needle portion 38.
  • the injection point 62 at the Injection molding of the actuator 32 may be provided so that he at the downstream end of the actuator 32 in one Well 61 lies.
  • the Valve closing member section 46 Before attaching the Valve closing member section 46 must then namely not be removed, reducing costs is guaranteed. Rather, after welding the spherical valve closure member portion 46 on the Contact surface 49 of the actuating part 32, the recess 61 hermetically sealed with the injection point 62, so that this area has no negative effects.
  • the MIM method is even easier to use if instead of the already known tubular actuation parts Actuating parts 32 according to the invention with a solid Valve needle section 38 are made. The bringing in of transverse openings in the area of the valve needle section 38 is completely eliminated.
  • Valve needle 34 with anchor section 36, valve needle section 38 and valve closing member portion 46 as a molded part the metal injection molding process. In order to there is no welding of the valve closing element section 46 on the valve needle section 38.

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)

Claims (6)

  1. Aiguille (34) pour une soupape à commande électromagnétique, notamment un injecteur pour des installations d'injection de carburant de moteurs à combustion interne, comprenant un noyau (2), un enroulement électromagnétique (1) et un siège de soupape (22), fixe, avec lequel coopère une aiguille d'injecteur (34) formée d'un segment d'induit (36), d'un segment d'aiguille (38) et d'un segment à organe d'obturation (46), le segment d'aiguille (38) reliant le segment d'induit (36) au segment à organe d'obturation (46), tandis qu'à l'intérieur du segment d'induit (36) est prévue une cavité intérieure centrale (57) d'où partent au moins deux canaux d'écoulement (60) dirigés axialement, le segment d'aiguille (38) étant réalisé sous la forme d'une pièce massive constituant la limite intérieure d'au moins deux canaux d'écoulement (60),
    caractérisé en ce qu'
    au moins le segment d'induit (36) avec le segment d'aiguille (38) de l'aiguille (34), sont réalisés en une seule partie, et la cavité intérieure (57) du segment d'induit (36) présente à sa périphérie extérieure au moins deux rainures axiales (55) alignées sur les canaux d'écoulement (60) réalisés dans la limite radiale du segment d'aiguille (38).
  2. Aiguille selon la revendication 1,
    caractérisée en ce qu'
    au moins le segment d'induit (36) avec le segment d'aiguille (38) de l'aiguille d'injecteur (34), sont réalisés en une seule pièce par une injection suivie d'un frittage selon le procédé de moulage par injection de métal.
  3. Aiguille selon la revendication 1,
    caractérisée en ce que
    le segment d'induit (36), le segment d'aiguille (38) et le segment à organe d'obturation (46) de l'aiguille (34) sont réalisés sous la forme d'une pièce unique par le procédé de moulage par injection de métal.
  4. Aiguille selon l'une quelconque des revendications 1 ou 2,
    caractérisée en ce que le segment à organe d'obturation (46) est relié par une soudure (48) à l'extrémité du segment d'aiguille (38) non tournée vers le segment d'induit (36).
  5. Aiguille selon la revendication 1,
    caractérisée en ce qu' une surface frontale amont (56) du segment d'aiguille (38) se trouve dans la zone d'extension axiale du segment d'induit (36) qui constitue la limite de la cavité (56) du segment d'induit (36), limite tournée vers le segment à organe d'obturation (46).
  6. Aiguille selon la revendication 2,
    caractérisée en ce que
    l'extrémité aval du segment d'aiguille (38) comporte une cavité (61) dans laquelle se trouve le point d'injection (62) ayant servi à injecter le segment d'induit (36) et le segment d'aiguille (38).
EP95105247A 1994-05-05 1995-04-07 Pointeau pour une soupape à commande électromagnétique Expired - Lifetime EP0685643B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4415850A DE4415850A1 (de) 1994-05-05 1994-05-05 Ventilnadel für ein elektromagnetisch betätigbares Ventil
DE4415850 1994-05-05

Publications (3)

Publication Number Publication Date
EP0685643A2 EP0685643A2 (fr) 1995-12-06
EP0685643A3 EP0685643A3 (fr) 1997-05-02
EP0685643B1 true EP0685643B1 (fr) 2001-09-12

Family

ID=6517355

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95105247A Expired - Lifetime EP0685643B1 (fr) 1994-05-05 1995-04-07 Pointeau pour une soupape à commande électromagnétique

Country Status (5)

Country Link
US (1) US5632467A (fr)
EP (1) EP0685643B1 (fr)
JP (1) JPH07301357A (fr)
DE (2) DE4415850A1 (fr)
ES (1) ES2164115T3 (fr)

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DE4420176A1 (de) * 1994-06-09 1995-12-14 Bosch Gmbh Robert Ventilnadel für ein elektromagnetisch betätigbares Ventil
JPH10196488A (ja) * 1997-01-08 1998-07-28 Aisan Ind Co Ltd 電磁式燃料噴射弁
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JP3933739B2 (ja) * 1997-01-30 2007-06-20 三菱電機株式会社 燃料噴射弁
JP3518966B2 (ja) * 1997-01-30 2004-04-12 三菱電機株式会社 筒内噴射用燃料噴射弁
DE19739150A1 (de) * 1997-09-06 1999-03-11 Bosch Gmbh Robert Brennstoffeinspritzventil
US6328231B1 (en) * 1998-05-27 2001-12-11 Siemens Automotive Corporation Compressed natural gas injector having improved low noise valve needle
US6508418B1 (en) 1998-05-27 2003-01-21 Siemens Automotive Corporation Contaminant tolerant compressed natural gas injector and method of directing gaseous fuel therethrough
US6489870B1 (en) 1999-11-22 2002-12-03 Tlx Technologies Solenoid with improved pull force
US6392516B1 (en) * 1998-12-04 2002-05-21 Tlx Technologies Latching solenoid with improved pull force
US6089467A (en) * 1999-05-26 2000-07-18 Siemens Automotive Corporation Compressed natural gas injector with gaseous damping for armature needle assembly during opening
US6431474B2 (en) 1999-05-26 2002-08-13 Siemens Automotive Corporation Compressed natural gas fuel injector having magnetic pole face flux director
US6422488B1 (en) 1999-08-10 2002-07-23 Siemens Automotive Corporation Compressed natural gas injector having gaseous dampening for armature needle assembly during closing
US6405947B2 (en) 1999-08-10 2002-06-18 Siemens Automotive Corporation Gaseous fuel injector having low restriction seat for valve needle
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JP3734702B2 (ja) * 2000-10-17 2006-01-11 株式会社日立製作所 電磁式燃料噴射弁
US6631857B2 (en) * 2000-12-22 2003-10-14 Caterpillar Inc Partially plastic fuel injector component and method of making the same
US6719005B1 (en) 2002-04-03 2004-04-13 Hydro-Gear, Limited Partnership Combination check valve and pressure release valve
US6964280B1 (en) 2002-04-03 2005-11-15 Hydro-Gear Limited Partnership Valve assembly for use in a hydraulic component
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US6761182B1 (en) * 2002-04-03 2004-07-13 Hydro-Gear Limited Partnership Method for configuration of a valve
US7066199B1 (en) 2002-04-03 2006-06-27 Hydro-Gear Limited Partnership Valve assembly
US6691512B1 (en) 2002-04-03 2004-02-17 Hydro-Gear Limited Partnership Hydraulic transmission with combination check valve and pressure release valve
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DE10261610A1 (de) * 2002-12-27 2004-07-08 Robert Bosch Gmbh Ventil zum Steuern eines Fluids
US7028708B1 (en) 2003-05-09 2006-04-18 Hydro-Gear Limited Partnership Combined check valve and pressure relief valve
US7316114B1 (en) 2003-09-18 2008-01-08 Hydro-Gear Limited Partnership Valve for a hydraulic drive apparatus
US6935454B1 (en) 2003-09-18 2005-08-30 Hydro-Gear Limited Partnership Valve for a hydraulic drive apparatus
DE102004058803A1 (de) 2004-12-07 2006-06-08 Robert Bosch Gmbh Einspritzventil
US7296594B1 (en) 2005-03-22 2007-11-20 Hydro-Gear Limited Partnership Combination check valve and neutral valve assembly for use in a hydraulic component
US20070069172A1 (en) * 2005-04-26 2007-03-29 Parker-Hannifin Corporation Magnetic repulsion actuator and method
US7178787B2 (en) * 2005-05-05 2007-02-20 Trw Automotive U.S. Llc Valve assembly
US7451780B1 (en) 2005-05-16 2008-11-18 Hydro-Gear Limited Partnership Multifunction valve for use in a hydraulic component
DE102005023369B4 (de) * 2005-05-20 2017-07-13 Continental Automotive Gmbh Einspritzventil und Düsennadel für das Einspritzventil
US7673847B2 (en) * 2005-09-21 2010-03-09 Aisan Kogyo Kabushiki Kaisha Fluid control valve for supplying gas to a fuel cell in a vehicle
DE102005052255B4 (de) 2005-11-02 2020-12-17 Robert Bosch Gmbh Brennstoffeinspritzventil
DE102006020689A1 (de) * 2006-05-04 2007-11-08 Robert Bosch Gmbh Magnetventil mit stoffschlüssiger Ankerverbindung
CN101506511B (zh) * 2006-09-25 2011-10-26 株式会社日立制作所 燃料喷射阀
US8230839B2 (en) * 2006-09-25 2012-07-31 Hitachi, Ltd. Fuel injection valve
CN102094736B (zh) * 2006-09-25 2012-09-05 株式会社日立制作所 燃料喷射阀
DE102007062182A1 (de) 2007-12-21 2009-06-25 Robert Bosch Gmbh Einspritzventil zum Abspritzen eines Fluids
DE102008010976A1 (de) * 2008-02-25 2009-08-27 Robert Bosch Gmbh Verfahren zum Richten eines langgestreckten Bauteils
US20100155510A1 (en) * 2008-12-22 2010-06-24 Bamber Daniel W Nozzle trumpet
DE102009055133A1 (de) 2009-12-22 2011-06-30 Robert Bosch GmbH, 70469 Polkern für Magnetventile hergestellt mittels Mehrstoff-MIM
DE102011080693A1 (de) * 2011-08-09 2013-02-14 Robert Bosch Gmbh Magnetanker
JP5862941B2 (ja) * 2011-11-08 2016-02-16 株式会社デンソー 燃料噴射弁
DE102012223552A1 (de) 2012-12-18 2014-06-18 Robert Bosch Gmbh Ventil zum Zumessen von Fluid
JP6139191B2 (ja) * 2013-03-14 2017-05-31 日立オートモティブシステムズ株式会社 電磁式燃料噴射弁
JP6187563B2 (ja) * 2015-09-28 2017-08-30 株式会社デンソー 燃料噴射弁
DE102018200357A1 (de) * 2018-01-11 2019-07-11 Robert Bosch Gmbh Ventil zum Zumessen eines Fluids, insbesondere Brennstoffeinspritzventil

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DE4230376C1 (fr) * 1992-09-11 1993-04-22 Robert Bosch Gmbh, 7000 Stuttgart, De

Also Published As

Publication number Publication date
JPH07301357A (ja) 1995-11-14
DE59509585D1 (de) 2001-10-18
US5632467A (en) 1997-05-27
ES2164115T3 (es) 2002-02-16
DE4415850A1 (de) 1995-11-09
EP0685643A2 (fr) 1995-12-06
EP0685643A3 (fr) 1997-05-02

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