EP1001863B1 - Verfahren zur herstellung eines ventilsitzkörpers für ein brennstoffeinspritzventil und brennstoffeinspritzventil - Google Patents

Verfahren zur herstellung eines ventilsitzkörpers für ein brennstoffeinspritzventil und brennstoffeinspritzventil Download PDF

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Publication number
EP1001863B1
EP1001863B1 EP98959704A EP98959704A EP1001863B1 EP 1001863 B1 EP1001863 B1 EP 1001863B1 EP 98959704 A EP98959704 A EP 98959704A EP 98959704 A EP98959704 A EP 98959704A EP 1001863 B1 EP1001863 B1 EP 1001863B1
Authority
EP
European Patent Office
Prior art keywords
valve
region
seat
guide
valve seat
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
EP98959704A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1001863A1 (de
Inventor
Hubert Stier
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 EP1001863A1 publication Critical patent/EP1001863A1/de
Application granted granted Critical
Publication of EP1001863B1 publication Critical patent/EP1001863B1/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
    • F02M61/168—Assembling; Disassembling; Manufacturing; Adjusting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B15/00—Machines or devices designed for grinding seat surfaces; Accessories therefor
    • B24B15/02—Machines or devices designed for grinding seat surfaces; Accessories therefor in valve housings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B33/00—Honing machines or devices; Accessories therefor
    • B24B33/02—Honing machines or devices; Accessories therefor designed for working internal surfaces of revolution, e.g. of cylindrical or conical shapes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B37/00—Lapping machines or devices; Accessories
    • B24B37/02—Lapping machines or devices; Accessories designed for working surfaces of revolution
    • 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
    • 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
    • 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
    • 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
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49229—Prime mover or fluid pump making
    • Y10T29/49298—Poppet or I.C. engine valve or valve seat making
    • Y10T29/49306—Valve seat making
    • 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
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49405—Valve or choke making
    • Y10T29/49409—Valve seat forming
    • 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
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49405—Valve or choke making
    • Y10T29/49426—Valve or choke making including metal shaping and diverse operation

Definitions

  • the invention is based on a method of manufacture a valve seat body with a valve seat for a Fuel injection valve according to the preamble of claim 1 or from a fuel injector according to the preamble of claim 9. Such a procedure and one Valves are known from US 5 285 969 A.
  • Fuel injector known to the one Valve seat body and one of them upstream has disc-shaped guide body.
  • the guide body has an at least partially dome-shaped curved inner guide opening for a spherical Valve member.
  • the valve seat body and the guide body are separated from each other at their exact inner openings to be machined. This is also done with various processing tools in different setups.
  • the inventive method for producing a Valve seat body with a valve seat for a Fuel injector with the features of claim 1 has the advantage that in a simple manner Wise with little material, time and tools extremely precise both guide sections and a Valve seat area finely machined in a valve seat body become. It is particularly advantageous that only one only processing tool, namely a very precise one shaped so-called master ball, for fine machining of the different areas needed, which is also in ideally takes place at the same time.
  • the Guide sections from the outset in the axial direction and in Circumferential direction narrow and thus small area, so that they are optimally machined with the master ball can be. So be advantageous Concentricity achieved, as in known Cone / ball sealing seat arrangements with a comparatively small size Effort cannot be achieved.
  • the fuel injector according to the invention with the Features of claim 9 has the advantage that a valve seat body with a valve seat area and a management area is particularly simple and inexpensive can be finished, and this with an extremely high Quality in terms of concentricity and tightness.
  • guide sections in the Guide area from the outset in the axial direction and in Circumferential direction narrow and thus small area, so that this optimally with a master ball as Machining tool can be edited.
  • FIG. 1 shows it Fuel injector with a specially shaped, valve seat body produced according to the invention in section
  • Figure 2 shows the valve seat body with a so-called Master ball
  • Figure 3 is a plan view of the Valve seat body with one inside and with the Valve seat interacting spherical Valve closing body
  • Figure 4 is a plan view of only the Valve seat body with identification not to scale the points of contact of the valve closing body in Valve seat body.
  • FIG. 1 is an embodiment Electromagnetically actuated valve in the form of a Injector for fuel injection systems from mixture-compression-ignition internal combustion engines partially shown.
  • the valve has a tubular one Valve seat support 1, in the concentric to one Longitudinal valve axis 2, a longitudinal bore 3 is formed.
  • a longitudinal bore 3 is formed in the longitudinal bore 3 in the longitudinal bore 3 in the longitudinal bore 3 in the longitudinal bore 3 in the longitudinal bore 3 axially movable valve needle 6 arranged.
  • the valve is actuated electromagnetically in known way.
  • Die Valve needle 6 is made of armature 12, a spherical one Valve closing body 13 and one of these two items connecting connecting part 14 formed, the Connecting part 14 has a tubular shape.
  • the Return spring 8 is supported with its lower end on the upper end face of the connecting part 14.
  • the anchor 12 is with the valve closing body 13 facing away from the end of Connecting part 14 connected by a weld 15 and aligned with the core 11.
  • Valve closing body 13 with the end facing away from the armature 12 the connecting part 14 e.g. with a weld 16 tight connected.
  • the magnetic coil 10 surrounds the core 11, which end of the magnet coil 10 not enclosing one fuel inlet connector, the the Supply of the medium to be measured by means of the valve, here Fuel, serves, represents.
  • valve seat carrier 1 With the lower end of the core 11 and with the Valve seat carrier 1 is concentric with the valve longitudinal axis 2 tightly a tubular, metallic intermediate part 19 connected for example by welding.
  • Valve longitudinal axis 2 In the downstream end of the core 11 facing away from the core Valve seat support 1 is concentric with Valve longitudinal axis 2 extending longitudinal bore 3 cylindrical valve seat body 25 tight by welding assembled.
  • the valve seat body shaped according to the invention 25 faces the core 11 a fixed Valve seat area 26.
  • the solenoid 10 is of at least one, for example trained as a bracket, as a ferromagnetic element serving guide element 30 in the circumferential direction at least partially surrounded, the one end of the core 11th and with its other end on the valve seat support 1 is applied and with these e.g. by welding, soldering or one Adhesive connection is connected.
  • valve seat body 25 To guide the valve closing body 13 during the A guide area 31 serves for axial movement Through opening 32 of the valve seat body 25.
  • the Valve seat area 26 also represents an area of the Through opening 32 represents, for example, in downstream direction directly to the guide area 31 connects.
  • the valve closing body 13 Lower end face 33 facing away is the valve seat body 25 with e.g. Pot-shaped spray plate 34 concentrically and firmly connected.
  • the connection of Valve seat body 25 and spray orifice plate 34 takes place for example by a circumferential and dense, e.g. weld seam 45 formed by a laser this type of assembly is an unwanted risk Deformation of the spray disk 34 in the area of it at least one, for example four by eroding or Stamped molded spray openings 46 avoided.
  • the attachment of the Spray plate 34 on the valve seat body 25 take place before the fine machining of the valve seat body 25 is carried out will be described in more detail below.
  • the insertion depth of the valve seat body 25 and Spray plate 34 existing valve seat part in the Longitudinal bore 3 determines i.a. the adjustment of the stroke of the Valve needle 6, since the one end position of the valve needle 6 at non-excited solenoid 10 by the system of Valve closing body 13 fixed to the valve seat area 26 is.
  • the other end position of the valve needle 6 is at excited solenoid 10 for example by the system an upper end face 22 of the armature 12 on a lower one End face 35 of the core 11 set. The way between these two end positions of the valve needle 6 represents the stroke represents.
  • the spherical valve closing body 13 interacts with the surface tapering in the direction of the flow of the valve seat area 26 of the valve seat body 25 together.
  • the immediate valve seat can also be replaced by a opposite the frustoconical surface slightly raised and narrow ring seating area 26 ' be formed.
  • the ring seat area 26 ' projects in one in such cases about 50 to 100 ⁇ m over the valve seat area 26 out.
  • the guide area 31 has several Flow passages 27 on which a flow of the medium in Direction to valve seat 26, 26 'of valve seat body 25 enable.
  • valve seat body 25 is a single component shown together with a so-called master ball 130, those in the application of the invention Manufacturing process for fine machining as Machining tool is used.
  • Master ball 130 is, for example, on a rod-shaped, attached rotating tool holder body 129, which in comparable form e.g. known from DE-OS 196 02 068 is.
  • the passage opening 32 in the valve seat body 25 has several differently designed sections or Areas that connect axially to each other. The essential areas of the through opening 32 are a e.g.
  • Inflow area 47 a central opening area 48
  • the guide area 31 the Valve seat area 26 or ring seat area 26 'and a Exit area 49. While areas 47, 48, 26 and 26 'and 49 revolving uniformly over their circumference are formed, the guide area 31 is by a its scope alternating sequence of web-like Guide sections 51 and channel-like flow passages 27 marked.
  • This contour of the previously described inner through opening 32 and the otherwise largely cylindrical outer contour are in a known manner corresponding primary shaping and massive shaping (e.g. Cold forming, cold pressing; optionally hardening).
  • the very precisely manufactured and very hard Master ball 130 with an ideal spherical shape has one slightly larger diameter than the one with the later Valve seat 26, 26 'interacting valve closing body 13.
  • finishing the valve seat body 25 with the Master ball 130 is honing (ball honing) or Fine grinding or lapping, using fine-grain honing oils, Lapping or grinding pastes are used with which minimal material removal at the desired locations in the Valve seat body 25 can be achieved.
  • this Machining technology becomes the desired minimal curvature generated on the guide portions 51 that have a radius have, which corresponds to the radius of the master ball 130.
  • the guide sections 51 of very much in the axial direction and in the circumferential direction short and narrow, so that it fits perfectly with the master ball 130 can be edited.
  • the guide sections 51 ideally lie in viewed in the axial direction in the region of the spherical equator 52, 52 'of the master ball 130 or later arranged there Valve closing body 13, the guide portions 51 for example, seen minimally in the downstream direction in front of the spherical equator 52, 52 'following the opening area 48 kick off.
  • the ball equator 52 'of the valve closing body 13 is indicated in Figure 1.
  • the guide sections 51 extend in the axial direction of the valve seat area 26, 26 'turned so far that they are only a maximum of 150 ⁇ m the spherical equator 52 'of the valve closing body 13 at the Valve seat area 26, 26 'of valve closing body 13 protrude.
  • FIGS. 3 and 4 as top views of the valve seat body 25 to illustrate, it makes sense to have five guide sections 51 and five flow passages 27 in the guide area 31 to be provided alternately over the scope.
  • three Guide sections 51 should be present in any case.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • General Engineering & Computer Science (AREA)
  • Electromagnetism (AREA)
  • Geometry (AREA)
  • Manufacturing & Machinery (AREA)
  • Fuel-Injection Apparatus (AREA)
  • Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
EP98959704A 1997-12-20 1998-10-02 Verfahren zur herstellung eines ventilsitzkörpers für ein brennstoffeinspritzventil und brennstoffeinspritzventil Expired - Lifetime EP1001863B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19757117A DE19757117A1 (de) 1997-12-20 1997-12-20 Verfahren zur Herstellung eines Ventilsitzkörpers für ein Brennstoffeinspritzventil und Brennstoffeinspritzventil
DE19757117 1997-12-20
PCT/DE1998/002928 WO1999032259A1 (de) 1997-12-20 1998-10-02 Verfahren zur herstellung eines ventilsitzkörpers für ein brennstoffeinspritzventil und brennstoffeinspritzventil

Publications (2)

Publication Number Publication Date
EP1001863A1 EP1001863A1 (de) 2000-05-24
EP1001863B1 true EP1001863B1 (de) 2002-05-15

Family

ID=7852906

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98959704A Expired - Lifetime EP1001863B1 (de) 1997-12-20 1998-10-02 Verfahren zur herstellung eines ventilsitzkörpers für ein brennstoffeinspritzventil und brennstoffeinspritzventil

Country Status (8)

Country Link
US (1) US6189816B1 (ko)
EP (1) EP1001863B1 (ko)
JP (1) JP2001513165A (ko)
KR (1) KR20000071199A (ko)
BR (1) BR9807436A (ko)
DE (2) DE19757117A1 (ko)
ES (1) ES2177104T3 (ko)
WO (1) WO1999032259A1 (ko)

Families Citing this family (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6920690B1 (en) * 1999-04-27 2005-07-26 Siemens Vdo Automotive Corp. Method of manufacturing a fuel injector seat
KR100431766B1 (ko) * 1999-04-27 2004-05-17 지멘스 비디오 오토모티브 코포레이션 전이영역을 구비한 연료 인젝터
DE19928916B4 (de) * 1999-06-24 2017-12-14 Robert Bosch Gmbh Brennstoffeinspritzventil
US6450042B1 (en) * 2000-03-02 2002-09-17 Micro Motion, Inc. Apparatus for and a method of fabricating a coriolis flowmeter formed primarily of plastic
US6676044B2 (en) * 2000-04-07 2004-01-13 Siemens Automotive Corporation Modular fuel injector and method of assembling the modular fuel injector
US6360440B1 (en) * 2000-09-13 2002-03-26 Delphi Technologies, Inc. Method for locating injector ball valve guide
DE10256703B3 (de) * 2002-12-04 2004-04-01 Siemens Ag Verfahren zur Herstellung von Kraftstoffhochdruckspeichern
DE10260302A1 (de) * 2002-12-20 2004-07-15 Siemens Ag Verfahren zum Bearbeiten einer Kante eines hochdruckfesten Bauteils , insbesondere zum hydro-erosiven Verrunden einer Kante sowie und Vorrichtung hierzu
EP1493534A1 (de) 2003-07-01 2005-01-05 Maschinenfabrik Gehring GmbH & Co. KG Verfahren zur Herstellung von Ventilsitzen und Ventil mit einem im wesentlichen kegelförmigen Ventilsitz
DE10346075B4 (de) * 2003-10-04 2014-05-08 Robert Bosch Gmbh Verfahren zur Herstellung eines Kraftstoffeinspritzventils und nach diesem Verfahren hergestelltes Kraftstoffeinspritzventil
US7334746B2 (en) * 2004-03-08 2008-02-26 Continental Automotive Systems Us, Inc. Seat-lower guide combination
US7669789B2 (en) * 2007-08-29 2010-03-02 Visteon Global Technologies, Inc. Low pressure fuel injector nozzle
US20090057446A1 (en) * 2007-08-29 2009-03-05 Visteon Global Technologies, Inc. Low pressure fuel injector nozzle
US20090090794A1 (en) * 2007-10-04 2009-04-09 Visteon Global Technologies, Inc. Low pressure fuel injector
US20090200403A1 (en) * 2008-02-08 2009-08-13 David Ling-Shun Hung Fuel injector
JP6059915B2 (ja) * 2012-08-27 2017-01-11 日立オートモティブシステムズ株式会社 燃料噴射弁
DE102012224403A1 (de) 2012-12-27 2014-07-03 Robert Bosch Gmbh Druckregelventil für ein Kraftstoffeinspritzsystem
JP2014152695A (ja) * 2013-02-08 2014-08-25 Hitachi Automotive Systems Ltd 燃料噴射弁
DE102019107836A1 (de) 2018-06-12 2019-12-12 Marco Systemanalyse Und Entwicklung Gmbh Jet-Ventil
US11828380B2 (en) * 2021-07-23 2023-11-28 Fisher Controls International Llc Valve bodies and methods of manufacturing the same
WO2023109957A1 (zh) * 2021-12-18 2023-06-22 浙江盾安人工环境股份有限公司 截止阀

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3191277A (en) * 1961-05-17 1965-06-29 Clarence O Glasgow Valve seat
US5285969A (en) * 1989-11-25 1994-02-15 Robert Bosch Gmbh Electromagnetically operated fuel injection valve
DE4037952A1 (de) 1990-11-29 1992-06-04 Bosch Gmbh Robert Verfahren zur montage eines filters an einem ventil und ventil
US5285968A (en) 1992-09-10 1994-02-15 Mcsheehy William H Water distribution yoke for tree cultivation
DE4418228A1 (de) * 1994-03-24 1995-09-28 Nagel Peter Einspritzventil für die Kraftstoff-Einspritzung von Otto-Einspritzmotoren und Dieselmotoren
JP3431378B2 (ja) * 1995-06-22 2003-07-28 株式会社日立製作所 弁のシール面の仕上加工方法および弁のシール面の仕上加工装置および弁装置
DE19527626A1 (de) * 1995-07-28 1997-01-30 Bosch Gmbh Robert Brennstoffeinspritzventil
DE19537382A1 (de) 1995-10-07 1997-04-10 Bosch Gmbh Robert Elektromagnetisch betätigbares Ventil, insbesondere Brennstoffeinspritzventil
DE19602068C2 (de) * 1996-01-20 1998-07-02 Bosch Gmbh Robert Verfahren und Vorrichtung zur Herstellung von rotationssymmetrischen Ventilsitzflächen mit hoher Oberflächengüte an Ventilen, insbesondere Brennstoffeinspritzventilen für Brennkraftmaschinen

Also Published As

Publication number Publication date
WO1999032259A1 (de) 1999-07-01
KR20000071199A (ko) 2000-11-25
ES2177104T3 (es) 2002-12-01
BR9807436A (pt) 2000-04-18
JP2001513165A (ja) 2001-08-28
EP1001863A1 (de) 2000-05-24
DE19757117A1 (de) 1999-06-24
US6189816B1 (en) 2001-02-20
DE59804149D1 (de) 2002-06-20

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