EP0955128A2 - Dispositif d'étanchéité, en particulier pour injecteurs de moteur à combustion interne et procédé d'un tel siège d'étanchéité - Google Patents

Dispositif d'étanchéité, en particulier pour injecteurs de moteur à combustion interne et procédé d'un tel siège d'étanchéité Download PDF

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Publication number
EP0955128A2
EP0955128A2 EP98109828A EP98109828A EP0955128A2 EP 0955128 A2 EP0955128 A2 EP 0955128A2 EP 98109828 A EP98109828 A EP 98109828A EP 98109828 A EP98109828 A EP 98109828A EP 0955128 A2 EP0955128 A2 EP 0955128A2
Authority
EP
European Patent Office
Prior art keywords
seat
valve
grindstone
valve seat
conical
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.)
Granted
Application number
EP98109828A
Other languages
German (de)
English (en)
Other versions
EP0955128A3 (fr
EP0955128B1 (fr
Inventor
Manfred G. Becker
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.)
Ernst Thielenhaus GmbH and Co KG
Original Assignee
Ernst Thielenhaus GmbH and Co KG
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 Ernst Thielenhaus GmbH and Co KG filed Critical Ernst Thielenhaus GmbH and Co KG
Publication of EP0955128A2 publication Critical patent/EP0955128A2/fr
Publication of EP0955128A3 publication Critical patent/EP0955128A3/fr
Application granted granted Critical
Publication of EP0955128B1 publication Critical patent/EP0955128B1/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
    • 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
    • B24B11/00—Machines or devices designed for grinding spherical surfaces or parts of spherical surfaces on work; Accessories therefor
    • 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
    • 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
    • Y10T137/00—Fluid handling
    • Y10T137/0318—Processes
    • 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
    • Y10T137/00—Fluid handling
    • Y10T137/7722—Line condition change responsive valves
    • Y10T137/7837—Direct response valves [i.e., check valve type]
    • Y10T137/7904—Reciprocating valves
    • Y10T137/7908—Weight biased
    • Y10T137/7909—Valve body is the weight
    • Y10T137/791—Ball valves
    • 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
    • Y10T29/4935—Heat exchanger or boiler making
    • Y10T29/49373—Tube joint and tube plate structure
    • Y10T29/49375—Tube joint and tube plate structure including conduit expansion or inflation
    • 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

Definitions

  • the invention relates to a sealing arrangement, in particular for fuel injection valves in internal combustion engines, consisting of a valve ball and a valve body which has a conical valve seat for the valve ball, the conical valve seat having a surface machined by grinding.
  • the conical valve seat of a ball valve which is used as a fuel injector in small dimensions, is machined by grinding with a conical grinding tool, with a line contact between the grinding tool and the conical surface to be machined.
  • shape deviations from the circular shape are unavoidable.
  • the shape deviation from the circular shape is more than 1 ⁇ m, based on the diameter. Shape deviations of more than 1 ⁇ m lead to annoying leak rates when the valve is closed.
  • the invention is based on the object of specifying a sealing arrangement which can be used in particular for fuel injection valves and consists of a valve ball and a conical valve seat, which is characterized by the tightest possible seating of the valve ball on the valve seat of the valve body and for metallic and ceramic material combinations of the valve ball and the valve body is suitable.
  • the object is achieved according to the invention in that the valve seat has an annularly encircling and circularly circularly shaped seat surface for the sealing seat of the valve ball, which is worked into the conical surface by fine grinding (finish machining), the radius of which forms the seat surface Circular arc is greater than the radius of the valve ball and the trough-shaped recess of the seat surface in the longitudinal section is dimensioned such that the shape deviations of the conically ground valve seat, measured in cross section, are eliminated from the circular shape at least in the apex region of the circular arc-shaped seat surface.
  • the shape deviation from the circular shape can be less than 0.1 ⁇ m (Micrometer) can be reduced.
  • the result is a tight fit between the metallic / ceramic metal ball and the metallic / ceramic seat, which is characterized by a very low leakage rate.
  • the width of the seat surface is preferably 200 to 500 ⁇ m.
  • the seat should have a surface roughness of less than 0.1 ⁇ m Ra.
  • the trough-shaped depression, measured in the apex of the arc-shaped seat surface, to the jacket plane of the valve seat is in the range from 2 to 10 ⁇ m.
  • the grindstone is inserted into a plastic shaft, which as flexible use with a radial clearance of 100 to 300 ⁇ m in the tool holder and is firmly clamped in the tool holder with a rear connecting pin with a press fit.
  • the invention teaches that the insert is held in an actuating piston which is movable in the tool holder and which executes feed and return movements relative to the workpiece holder by pressurization with a hydraulic fluid. Furthermore, through a central bore of the tool holder, the insert and the grindstone, cooling liquid can be supplied to the contact surface between the grindstone and the workpiece.
  • valve seat 3 for the valve ball 1.
  • the conical valve seat 3 has a surface machined by grinding with a surface roughness of 0.3 to 0.5 ⁇ m Ra.
  • grinding which is carried out with a conical grinding wheel, deviations from the circular shape are unavoidable in relation to the cross-sectional plane. They are based on the fact that only one line contact occurs between the grinding tool and the surface of the workpiece to be machined during grinding.
  • the shape deviations from the circular shape are in a seal arrangement with a valve body, the valve seat of which is 2 to 3 mm in diameter, shape deviations of up to 5 ⁇ m.
  • valve seat has a seat surface 4 for the sealing seat of the valve ball 1, which is machined into the conical surface by means of fine grinding (finish processing) and has an annular circumference and a circular arc in longitudinal section.
  • the radius of the circular arc forming the seat surface 4 is larger than the radius of the valve ball 1.
  • the trough-shaped depression of the seat surface in the longitudinal section of the valve body is further dimensioned such that the cross-sectional shape deviations of the conically ground valve seat are eliminated from the circular shape at least in the apex area of the circular arc-shaped seat surface.
  • the conical valve seat 3 has an average diameter of a few millimeters.
  • the width of the seat surface 4 measured in the lateral plane of the conical valve seat 3 is substantially smaller than the width of the conical valve seat and is 200 to 500 ⁇ m.
  • the surface roughness of the seat is low, whereby a finish of 0.1 ⁇ m Ra can be easily achieved by finishing.
  • the trough-shaped depression to the lateral plane of the valve seat measured in the apex of the arc-shaped seat surface 4 is in the range from 2 to 10 ⁇ m.
  • the average diameter of the valve seat measured at the contact surface with the valve ball, is 2.7 mm.
  • the valve ball has a diameter of 3.9 mm.
  • a circular arc-shaped seat is incorporated in the longitudinal section of the valve body, the radius of the circular arc being 2.9 mm and larger than the radius of the valve ball.
  • the width of the seat is 300 ⁇ m.
  • the trough-shaped depression is 5 ⁇ m (Fig. 2).
  • the sealing seat of the arrangement according to the invention has a leak rate of 0.03 cm 3 at a pressure difference of 2.5 bar.
  • FIG. 3 The method for producing the sealing arrangement according to the invention is shown schematically in FIG. 3.
  • a valve body 2 is clamped with a conically ground valve seat 3 for the valve ball in a workpiece holder 5 which can be driven in rotation.
  • a cylindrical grindstone 6 for fine grinding (finish machining) is inserted with an insert 7, which allows radial compensatory movements of the grindstone 6, into a tool holder 8, which is oriented at an angle of inclination ⁇ of 1 to 10 ° to the axis of rotation 9 of the workpiece holder 5 .
  • the conical valve seat 3 and the grindstone 6 are brought into contact by a feed movement of the tool holder 8 and / or workpiece holder 5, the grindstone 6 resting on the entire circumference of the conical valve seat 3 with an end machining edge.
  • the tool holder 8 and the workpiece holder 5 are then driven to rotate in opposite directions, with the grinding stone 6 being used to work into the conical valve seat 3 by means of the grinding stone 6, an annular circumferential seat 4 that is circular in the longitudinal section of the valve body, as shown in FIG.
  • the construction of the device results in particular from Fig. 4.
  • the grindstone 6 is inserted in a plastic shaft, which is guided as a flexible insert 7 with a radial play of 100 to 300 microns in the tool holder 8 and with a rear connecting pin 10 with a press fit in Tool holder 8 is clamped firmly.
  • the plastic shaft 7 is held in an actuating piston 11 which is movable in the tool holder 8 and which, by pressurizing it with a hydraulic fluid, makes feed and reset movements relative to Workpiece holder 5 executes.
  • Central bores 12 of the tool holder, the insert and the grindstone for the supply of coolant to the contact surface between the grindstone and the workpiece can also be seen

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • General Engineering & Computer Science (AREA)
  • Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
  • Fuel-Injection Apparatus (AREA)
EP98109828A 1998-05-06 1998-05-29 Dispositif d'étanchéité, en particulier pour injecteurs de moteur à combustion interne et procédé d'un tel siège d'étanchéité Expired - Lifetime EP0955128B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US73550 1998-05-06
US09/073,550 US6098958A (en) 1998-05-06 1998-05-06 Valve assembly, especially for a fuel-injection valve and method of making same

Publications (3)

Publication Number Publication Date
EP0955128A2 true EP0955128A2 (fr) 1999-11-10
EP0955128A3 EP0955128A3 (fr) 2001-04-11
EP0955128B1 EP0955128B1 (fr) 2002-07-17

Family

ID=22114371

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98109828A Expired - Lifetime EP0955128B1 (fr) 1998-05-06 1998-05-29 Dispositif d'étanchéité, en particulier pour injecteurs de moteur à combustion interne et procédé d'un tel siège d'étanchéité

Country Status (3)

Country Link
US (2) US6098958A (fr)
EP (1) EP0955128B1 (fr)
DE (1) DE59804798D1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1166962A1 (fr) * 2000-06-20 2002-01-02 Ernst Thielenhaus GmbH & Co. KG Procédé pour l'usinage final de siège de soupape sphérique pour une soupape d' injection d' un moteur à combustion interne

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000257575A (ja) * 1999-03-05 2000-09-19 Sanden Corp 圧縮機
US6920690B1 (en) * 1999-04-27 2005-07-26 Siemens Vdo Automotive Corp. Method of manufacturing a fuel injector seat
EP1493534A1 (fr) * 2003-07-01 2005-01-05 Maschinenfabrik Gehring GmbH & Co. KG Procédé de fabrication de sièges de soupape et soupape avec une surface de siège conique
WO2008083509A1 (fr) * 2007-01-10 2008-07-17 Fritz Gyger Ag Microsoupape
JP5155686B2 (ja) * 2008-02-17 2013-03-06 サンデン株式会社 往復動圧縮機の弁板と吸入弁及び／又は吐出弁との当接部の貼付き防止のための弁板の加工方法及び往復動圧縮機
US9079281B2 (en) * 2012-03-29 2015-07-14 North American Fuel Systems Remanufacturing, LLC Common rail valve seat refurbishing
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
DE102012223552A1 (de) * 2012-12-18 2014-06-18 Robert Bosch Gmbh Ventil zum Zumessen von Fluid
CN107143449A (zh) * 2017-07-03 2017-09-08 东莞市盈森汽车电喷科技有限公司 喷油器衔铁快速响应结构
DK180400B1 (en) * 2018-10-02 2021-03-30 Hans Jensen Lubricators As Deformation of a valve seat for improving a lubricator pump unit and lubrication system of a large slow-running two-stroke engine
DK181249B1 (en) * 2018-10-02 2023-05-31 Hans Jensen Lubricators As Modification of a valve seat for improving a lubricator pump unit and lubrication system of a large slow-running two-stroke engine, and an improved lubricator pump unit
CN114472710B (zh) * 2021-12-27 2023-09-26 中国航发长春控制科技有限公司 一种冲压工具及一种铜合金尖边密封加工方法

Family Cites Families (12)

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US1265365A (en) * 1916-11-21 1918-05-07 Cornelius Parish Auxiliary air-admission valve for internal-combustion engines.
US3012382A (en) * 1960-06-06 1961-12-12 Charles D Keck Grinding device
US3241822A (en) * 1965-03-08 1966-03-22 Acf Ind Inc Carburetor and fuel nozzle therefor
DE2033051A1 (de) * 1970-07-03 1972-01-05 Bosch Gmbh Robert Elektrisch gesteuerte Kraftstoffeinspritzeinrichtung
US3955648A (en) * 1973-06-05 1976-05-11 Walker Jr Frank J Removable type lubricating fitting
DE2410805A1 (de) * 1974-03-07 1975-09-11 Zahnradfabrik Friedrichshafen Verfahren zum innenrund- und planschleifen
DE2936425A1 (de) * 1979-09-08 1981-04-02 Robert Bosch Gmbh, 7000 Stuttgart Elektromagnetisch betaetigbares kraftsoffeinspritzventil
US4467566A (en) * 1982-01-29 1984-08-28 Sunnen Products Company Valve seat grinding device and tool for using same
JPS6095277A (ja) * 1983-10-27 1985-05-28 Fuji Koki Seisakusho:Kk 弁座切溝加工方法
JPS60118462A (ja) * 1983-11-30 1985-06-25 Keihin Seiki Mfg Co Ltd 燃料噴射弁における弁座形成体の加工方法
DE19545333A1 (de) * 1995-12-05 1997-06-12 Bosch Gmbh Robert Ventilschließkörper und Verfahren und Vorrichtung zur Herstellung von Dichtsitzen an Ventilschließkörpern
US5954312A (en) * 1996-01-31 1999-09-21 Siemens Automotive Corporation Groove means in a fuel injector valve seat

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1166962A1 (fr) * 2000-06-20 2002-01-02 Ernst Thielenhaus GmbH & Co. KG Procédé pour l'usinage final de siège de soupape sphérique pour une soupape d' injection d' un moteur à combustion interne
DE10029322A1 (de) * 2000-06-20 2002-01-17 Thielenhaus Ernst Gmbh & Co Kg Verfahren zur Finishbearbeitung eines Ventilsitzes für Kugelventile, insbes. für Brennstoffeinspritzventile in Brennkraftmaschinen

Also Published As

Publication number Publication date
US6098958A (en) 2000-08-08
EP0955128A3 (fr) 2001-04-11
US6173494B1 (en) 2001-01-16
DE59804798D1 (de) 2002-08-22
EP0955128B1 (fr) 2002-07-17

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