WO2005000524A1 - Verfahren zur herstellung von ventilsitzen und ventil - Google Patents
Verfahren zur herstellung von ventilsitzen und ventil Download PDFInfo
- Publication number
- WO2005000524A1 WO2005000524A1 PCT/EP2004/007062 EP2004007062W WO2005000524A1 WO 2005000524 A1 WO2005000524 A1 WO 2005000524A1 EP 2004007062 W EP2004007062 W EP 2004007062W WO 2005000524 A1 WO2005000524 A1 WO 2005000524A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- valve
- tool
- valve seat
- honing
- machining
- Prior art date
Links
Classifications
-
- 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
-
- 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 valve and a method for producing valve seats.
- a valve is generally formed by a valve seat, which surrounds a through bore, and a valve closure member, which in the "valve open” state releases the flow of a medium through the through bore and closes it in the "valve closed” state.
- valve seats are often manufactured with a conical sealing surface, against which the likewise conical valve needle, which forms the valve closure member, lies flat. Even with high machining accuracy, there is usually no high level of tightness at pressures above a few 100 bar.
- the processing which is carried out by grinding, requires that a grinding body carries out a rotational and a translational movement. This creates grooves with a certain slope and thus a labyrinth of communicating grooves, through which leakage occurs.
- a method for producing a sealing seat between a valve ball and a valve body with a conical valve seat is known from EP 0 955 128 B1.
- a valve body with a conically ground valve seat for the valve ball (valve closure member) is clamped in a workpiece holder that can be driven in rotation.
- a cylindrical grindstone is used for fine grinding with an insert that allows radial movement of the grindstone Tool holder used, which at an angle of 1 ° to 10 ° inclined to the axis of rotation in one
- DE 197 57 117 AI discloses a method for producing a valve seat body for a fuel injection valve, in which the valve seat area and guide sections are machined simultaneously by means of a machining tool in the form of a master ball.
- a line-shaped sealing surface of the seat from the ball is achieved in that a narrow bead is provided in the valve seat, which is approximately 0.1 mm above the surrounding surface.
- the invention has for its object to provide a valve with improved sealing properties and an improved method for producing such valve seats.
- the processing grooves should prevent the medium to be sealed from creeping and thereby prevent the Sealing effect can be improved.
- the multiplicity of concentric profile elevations of the valve seat surface provided according to the invention experience an elastic deformation when pressed against the valve closure member, since the roughness depth of the valve closure member is significantly lower than that of the valve seat surface.
- This elastic deformation results in narrow concentric valve seat surfaces, which significantly reduce leakage due to the medium creeping along the machining grooves of the valve seat, so that any leaks that may still occur remain within the tolerance range.
- the profile surveys mentioned are created by the method according to the invention.
- the tightness against a system pressure of up to over 2000 bar is the decisive functional parameter.
- the tightness is generally defined as the amount of leakage per unit of time under certain operating conditions such as pressure, temperature and density of the medium.
- the described and claimed method results in concentric machining grooves on the valve seat surface. They have the same direction as the ball's investment circle.
- the processing grooves as well as the profile elevations that occur between them during honing no longer have a slope perpendicular to the line-shaped contact surface of the ball or of the valve closure member on the valve seat surface. Leakage flows running in spiral grooves are therefore excluded.
- concentration of the profile elevations, a high roundness of the ball and the elastic deformability of the profile elevations of the valve seat are important.
- honing is carried out in several successive operations.
- This has the advantage that adapted machining conditions, such as different tools, can be used in each operation. It is particularly expedient here that the roughness profiles of the previous honing operation are removed with a tool with a finer cutting grain in each operation.
- the tool it is advantageous for the tool to be brought out of work periodically and for the cutting point to be flowed with cooling lubricant and for the adhered, removed material to be removed. This results in particularly effective cooling and lubrication in the area to be processed.
- Diamond split tools and / or abrasive brushes In order to be able to process the valve seat, which was initially brought into the conical basic shape in a suitable manner by honing, it is expedient to specify such a dimension through the preprocessing that, in the machining step of fine machining, an axial addition of the material at the valve seat of approx. 50 ⁇ m to 90 ⁇ m is removed.
- the decisive factor is the axial addition, which completely removes the preprocessing profile.
- the axis of the rotating spindle of the machine tool is not absolutely identical to the axis of the valve seat. It is therefore considered advantageous that the head of the tool is deflected in relation to the tool holder during honing.
- the deflection can take place by swiveling the tool around a hinge point of the tool holder or by elastic deformation of a tool shank.
- FIG. 1 shows a schematic diagram of a valve
- FIG. 2 shows a machined seat surface in an enlarged view
- Figure 3 is a schematic representation of a section through a valve seat and a ball as a valve closing member in the open position
- FIG. 4 shows an illustration according to FIG. 3 in the closed position
- FIG. 5 the side view of a tool with a conical working surface
- FIG. 6 shows a section through the tool according to FIG. 5,
- FIG. 7 shows an enlarged illustration of a section of the working surface on the tool according to FIG. 5,
- FIG. 8 shows the structure of a multi-layered grinding body soldered in a high vacuum
- Figures 9 (a), 9 (b), 9 (c) a ceramic or metallic bonded multilayer abrasive in a schematic representation in the sharp state before wear ( Figure 9 (a)), in the worn state ( Figure 9 (b)) and in by dressing again in a sharp state (FIG. 9 (c)),
- FIG. 10 shows a perspective view of a dressing process in which a worn multi-layer abrasive body is dressed using a dressing wheel
- FIG. 11 shows a view in the direction of the arrows XI-XI in FIG. 10
- FIG. 12 shows a tool with an elastic joint point in the tool shank
- FIG. 13 shows a schematic illustration of a tool for machining a flat sealing surface
- FIG. 14 shows a valve with a sealing surface machined according to FIG. 14.
- the valve 1 shows a basic illustration of a longitudinal section through a valve 1.
- the valve 1 consists of a housing 2 in which a valve chamber 3 is formed.
- the valve on he 3 is delimited on one side by a conical valve seat 4, the cone angle being 90 ° in the embodiment shown in FIG. 1.
- the through bore 25 is located in the middle of the valve seat 4.
- a valve closing member 5 which is a ball in the present case. The ball is held movably in the valve chamber 3 and can be lifted off the valve seat 4, whereby the valve 1 is opened.
- the illustration shown in Figure 1 shows the closed state of the valve.
- the longitudinal axis through the through bore 25 is designated by the reference symbol LA.
- FIG. 2 shows a detail of a section of a surface of the valve seat 4 machined by honing, a plurality of circular-arc-shaped grooves 6 and profile elevations 7 being visible, all of which are circular and concentric.
- the concentricity relates to the longitudinal axis LA of the valve 1.
- the grooves 6 and the profile elevations 7 arise during the fine machining by honing, whereby the fact that the profile elevations form between the grooves created by the machining is used.
- the roundness of the tapered valve seat after honing is 1.0 ⁇ m or less.
- valve seat 4 with grooves 6 and elevations 7 is shown as a longitudinal section.
- the ball serving as valve closing member 5 is at a distance from the valve seat 4, so that the valve is open.
- the valve seat 4 has a plurality of grooves 6 and profile elevations 7 that run concentrically to the longitudinal axis LA. They have a certain roughness depth, which is given, among other things, by the fact that the profile elevations 7 protrude differently.
- the roughness Rz of the machined surface of the valve seat 4 is, for example, 4-8 ⁇ m after honing.
- the roughness of the valve seat must be so large that an elastic deformation of the profile tips is possible, which, as explained in the following section, creates an improved seal with a pressed valve closing element and also compensates for roundness errors.
- the roughness R z of the ball, which forms the valve closing element 5 in FIGS. 3 and 4 must be significantly smaller than the roughness of the surface of the valve seat 4. It is, for example, approximately 1 ⁇ m R z .
- FIG. 4 shows an arrangement according to FIG. 3, but in the closed state of the valve, that is to say that the valve closing element 5 is pressed against the valve seat 4.
- the surface of the ball 5, which has a lower roughness depth than the valve seat 4 bears against a plurality of profile elevations 7, these being five profile elevations 7 in the exemplary embodiment shown.
- This system on several profile surveys 7 is possible that due to the design of the profile elevations 7, these have a certain elasticity and are therefore deformed in the region of their elasticity as a result of the force acting through the ball 5.
- a tool 8 for fine machining of the valve seat 4 is shown in FIG.
- the process step of fine machining is honing, which is explained in more detail below.
- the tool 8 comprises a tool head 9 and a tool holder 10, the latter being arranged on the end of a tool shaft 11 opposite the tool head 9.
- the tool head 9 has a conical jacket surface 15, the shape of the cone corresponding to that of the valve seat 4.
- the tool head 9 is equipped with cutting grain 12, diamond, cubic drilling nitrite, silicon carbide or aluminum oxide being used in a known manner as the cutting grain.
- the jacket glues of the conical work surfaces can be straight (as in FIG. 5), convex or concave. The convexly curved contours of the surface lines reduce the burr formation on the edges of the seat.
- the grain protrusion that is the height with which the cutting grains protrude beyond the binding material surrounding them, is dimensioned such that the profile depth of the grooves 6 produced on the valve seat is such that the profile elevations 7 formed between them are in contact with a valve closing member 5 deform elastically in such a way that the sealing described above takes place and the roundness error is also compensated.
- Figure 6 shows a longitudinal section through the tool 8, from which it can be seen that in the tool body Channel 13 for coolant and / or lubricant is located, which has several outlets 14 in the region of the conical surface 15.
- FIG. 7 shows an enlarged illustration of a section of the conical working surface 15 of the conical tool 8. It can be seen that a multiplicity of cutting cores 12 are embedded on the outside. Longitudinal slots 20 can also be seen, which are provided for supplying the processing point with cooling lubricant.
- the valve seat 4 is first pre-machined, for example hard and machined. Machining after hardening can also be omitted if there are slight delays in hardness.
- the fine machining is then carried out with the aid of the tool 8 shown in FIGS. 5 to 7.
- the kinematics of the method consists in the rotation of the tool with the working surface 15 of the tool resting against the conical surface which forms the valve seat 4 after machining.
- the tool 8 is axially tracked in accordance with the progressive removal. It is advantageous to bring the tool out of work periodically in order to flow with cooling lubricant to the processing point for cooling, winding and lubrication. This is possible by means of an actuating device of the tool, both force and away.
- the axial infeed force of the tool is controlled according to the process and thus the removal height is also monitored.
- the tool can also be applied by spring force.
- the fine machining is carried out in several operations as honing the cone seats. In each operation, the shape and roughness profiles are completely removed from the previous honing operation with a finer cutting grain. The last operation serves to create a functional surface profile, as described above. The previous operations serve to remove the shape error of the preprocessing. This gradually leads to finer surfaces.
- the concentric grooves 6 shown in FIGS. 2 to 4 and the profile elevations 7 located between the grooves are produced.
- deburring is carried out, for example using diamond splinter deburring tools and / or brushes containing abrasive grains.
- the delivery can be controlled, for example, by an electromechanical actuating device.
- the spindle unit moves in the axial advance into the axial vicinity of the future working position.
- the tool is thus just in front of the workpiece, the safety distance being traversed by the spindle at low speed.
- the axial contact force increases to the desired work value.
- This position is set to "0" and the tool is rotated so that the machining mode is started.
- the removal in the axial direction during a machining operation should take place in the specified cycle time.
- the control of the actuating device determines the removal as well as the time required or the processing speed. If the target removal is not achieved in the desired time, the force automatically increases when machining the next workpiece.
- valve seat surfaces with high tightness to be produced by the topography of the roughness profile and by the extremely small roundness deviations of the valve seat 4 which are achieved thereby.
- the wear mechanism of such a single-layer galvanic cutting surface is that cutting crystals protrude from a nickel matrix and are used for machining in the workpiece.
- the disadvantage of this, however, is that the cutting crystals become dull with increasing use.
- the infeed force must therefore always be increased in order to achieve the same penetration depth.
- the tool is finally worn out when the raised cutting crystals are largely worn out.
- the cutting crystals are arranged three-dimensionally in a binding matrix. These are usually sintered or high-vacuum solder (HVL) metallic bonds with diamond or cBN grit.
- HVL high-vacuum solder
- FIG. 8 shows the construction of such an HVL cutting body 30 from cutting crystals 21, mineral filler particles 22, solder connections 23 and a metallic binding phase 24, for example silver solder.
- FIG. 9 (a) shows the unused cutting body
- Figure 9 (b) shows the worn cutting body which has to be dressed.
- Figures 10 and 11 show such a dressing process.
- a dressing wheel 40 is provided, in the coating of which diamond crystals 41 are embedded.
- the dressing wheel 40 is rotated in the direction of the arrow 42 by a drive device (not shown).
- the cutting body 30 provided with a cutting surface 41 has an axis of rotation 46 with respect to the axis of rotation 47 of the dressing disk 40 which is inclined according to the desired cone angle of the tool.
- the cutting body 30 is rotated, as indicated by the arrow 48, in such a way that its tapered cutting surface 30 'is moved in the opposite direction to its contact with the dressing disk 40.
- Figure 9 (c) shows the trimmed and thus newly sharpened cutting body 30 (the original contour is shown in dashed lines).
- FIG. 12 shows a tool for machining tapered valve seats 55, in which - as a result of a production which is not completely possible - there is also a certain inclined position of the axis LA of the valve seat 55 with respect to the axis of rotation 60 by an angle ⁇ .
- the axis of rotation 60 is the axis about which the tool 51, which is clamped with its end 61 in a tool holder (not shown), is rotated by the latter.
- the tool 51 has a bending joint 50 in the form of a constriction, which allows the cutting body 52 to be adapted to the valve seat during the rotation.
- the angle o is normally in the range of a few minutes of angle. This can be compensated for by an elastic bend around such a predetermined bending point.
- FIG. 13 shows another exemplary embodiment, in which the tool 71 is provided with a flexible joint 70 which is attached to the lower end of the cutting body 72.
- the peculiarity of this exemplary embodiment is also that here the surface of the valve seat 75, which surrounds the channel 73, is flat.
- there are concentric grooves and in between profile elevations which are suitable for elastically deforming when a flat valve closing member 74 is in contact with a flat surface and for forming concentric, practically linear sealing surfaces.
- the flexible joint 70 is arranged as far down as possible, while in the tool with a conical cutting body, for example according to FIG. 12, since it is deflected by a horizontal normal force, it is arranged as far up as possible.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
- Lift Valve (AREA)
- Multiple-Way Valves (AREA)
- Taps Or Cocks (AREA)
Abstract
Description
Claims
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP04760180A EP1536917B1 (de) | 2003-07-01 | 2004-06-30 | Verfahren zur herstellung von ventilsitzen und ventil |
DE502004000155T DE502004000155D1 (de) | 2003-07-01 | 2004-06-30 | Verfahren zur herstellung von ventilsitzen und ventil |
DE202004021514U DE202004021514U1 (de) | 2003-07-01 | 2004-06-30 | Werkzeug zum Honschleifen von Ventilsitzen |
US10/563,095 US20110095222A1 (en) | 2003-07-01 | 2004-06-30 | Method for the production of valve seats, and valve |
BRPI0412136-8A BRPI0412136A (pt) | 2003-07-01 | 2004-06-30 | válvula com assento de válvula e processo para fabricação de assento de válvula |
AT04760180T ATE311271T1 (de) | 2003-07-01 | 2004-06-30 | Verfahren zur herstellung von ventilsitzen und ventil |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP03014909.0 | 2003-07-01 | ||
EP03014909A EP1493534A1 (de) | 2003-07-01 | 2003-07-01 | Verfahren zur Herstellung von Ventilsitzen und Ventil mit einem im wesentlichen kegelförmigen Ventilsitz |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2005000524A1 true WO2005000524A1 (de) | 2005-01-06 |
Family
ID=33427083
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2004/007062 WO2005000524A1 (de) | 2003-07-01 | 2004-06-30 | Verfahren zur herstellung von ventilsitzen und ventil |
Country Status (9)
Country | Link |
---|---|
US (1) | US20110095222A1 (de) |
EP (1) | EP1493534A1 (de) |
KR (1) | KR20060096185A (de) |
CN (1) | CN1816421A (de) |
AT (1) | ATE311271T1 (de) |
BR (1) | BRPI0412136A (de) |
DE (2) | DE502004000155D1 (de) |
ES (1) | ES2252730T3 (de) |
WO (1) | WO2005000524A1 (de) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20130068987A1 (en) * | 2010-05-25 | 2013-03-21 | Emerson Process Management (Tianjin) Valve Co., Ltd | Valve trim apparatus having a cavity to receive contaminates from a sealing surface |
US9726131B2 (en) * | 2007-01-29 | 2017-08-08 | Mitsubishi Electric Corporation | Fuel injection valve |
Families Citing this family (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102322379B (zh) * | 2007-01-29 | 2013-10-30 | 三菱电机株式会社 | 燃料喷射阀 |
JP5153898B2 (ja) * | 2010-04-28 | 2013-02-27 | セントラル硝子株式会社 | ハロゲンガス又はハロゲン化合物ガスの充填容器用バルブ |
CN203125128U (zh) * | 2012-11-14 | 2013-08-14 | 富鼎电子科技(嘉善)有限公司 | 毛刺去除装置 |
JP5831510B2 (ja) * | 2012-11-20 | 2015-12-09 | 株式会社デンソー | 燃料噴射弁および燃料噴射弁の取付方法 |
JP6000885B2 (ja) * | 2013-03-25 | 2016-10-05 | サンコール株式会社 | シール弁及びその製造方法 |
DE102016014181B4 (de) * | 2016-11-28 | 2022-08-18 | KAPP Werkzeugmaschinen GmbH | Verfahren zum Abrichten einer Schleifschnecke mittels einer Abrichtrolle und Abrichtrolle |
CN106334765B (zh) * | 2016-11-30 | 2018-06-08 | 芜湖全程智能科技有限公司 | Abs电磁阀阀座压球窝设备 |
US10480661B2 (en) * | 2017-09-06 | 2019-11-19 | Baker Hughes, A Ge Company, Llc | Leak rate reducing sealing device |
JP6963458B2 (ja) * | 2017-10-20 | 2021-11-10 | 株式会社ミクニ | バルブ装置 |
JP2020037989A (ja) * | 2018-09-06 | 2020-03-12 | 日立オートモティブシステムズ株式会社 | 弁機構およびこれを備えた燃料供給ポンプ |
FR3087685A1 (fr) * | 2018-10-31 | 2020-05-01 | Centre Technique Des Industries Mecaniques | Methode de fabrication d’un ensemble d’etancheite pour le controle du debit des ecoulements de fluide |
WO2020093091A1 (en) * | 2018-11-06 | 2020-05-14 | Ozone 1 Pty Ltd | Flow control device |
JP7132888B2 (ja) * | 2019-06-05 | 2022-09-07 | Ckd株式会社 | 流体制御機器の製造方法 |
CN110844108B (zh) * | 2019-11-22 | 2024-06-11 | 上海航翼高新技术发展研究院有限公司 | 一种飞机减压器组件氟塑料阀口的修复工具及修理方法 |
CN114643306B (zh) * | 2022-05-19 | 2022-08-02 | 成都成高阀门有限公司 | 一种阀门的阀座压制工装 |
CN114918818A (zh) * | 2022-05-31 | 2022-08-19 | 重庆川仪自动化股份有限公司 | 单向阀的宝石阀座密封槽的研磨抛光方法 |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
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DE19757117A1 (de) * | 1997-12-20 | 1999-06-24 | Bosch Gmbh Robert | Verfahren zur Herstellung eines Ventilsitzkörpers für ein Brennstoffeinspritzventil und Brennstoffeinspritzventil |
US5954312A (en) * | 1996-01-31 | 1999-09-21 | Siemens Automotive Corporation | Groove means in a fuel injector valve seat |
US20020040523A1 (en) * | 2000-06-20 | 2002-04-11 | Harald Goldau | Method of finishing a valve seat for ball valves, in particular for fuel injection valves in internal combustion engines |
EP0955128B1 (de) * | 1998-05-06 | 2002-07-17 | Ernst Thielenhaus GmbH & Co. KG | Dichtungsanordnung, insbesondere für Brennstoffeinspritzventile in Brennkraftmaschinen und Verfahren zur Herstellung eines Dichtsitzes |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
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US1560235A (en) * | 1925-01-05 | 1925-11-03 | Hinsch Albert Otto | Valve |
US5241794A (en) * | 1990-05-30 | 1993-09-07 | The Gleason Works | Grinding wheel for cutting blades |
DE4441623C2 (de) | 1993-12-15 | 1997-08-28 | Kopp Kadia Maschinenbau | Verfahren und Werkzeug zum Schleifen einer Fase am Anfang einer Bohrung |
US6105610A (en) * | 1998-02-13 | 2000-08-22 | Liquid Metronics Incorporated | Cartridge valve with triple sequential seal |
US6755720B1 (en) * | 1999-07-15 | 2004-06-29 | Noritake Co., Limited | Vitrified bond tool and method of manufacturing the same |
DE10046304C1 (de) | 2000-09-19 | 2002-06-06 | Bosch Gmbh Robert | Verfahren zum Herstellen eines Ventilsitzkörpers eines Brennstoffeinspritzventils |
-
2003
- 2003-07-01 EP EP03014909A patent/EP1493534A1/de not_active Withdrawn
-
2004
- 2004-06-30 CN CNA2004800190123A patent/CN1816421A/zh active Pending
- 2004-06-30 US US10/563,095 patent/US20110095222A1/en not_active Abandoned
- 2004-06-30 WO PCT/EP2004/007062 patent/WO2005000524A1/de not_active Application Discontinuation
- 2004-06-30 DE DE502004000155T patent/DE502004000155D1/de not_active Revoked
- 2004-06-30 ES ES04760180T patent/ES2252730T3/es not_active Expired - Lifetime
- 2004-06-30 BR BRPI0412136-8A patent/BRPI0412136A/pt not_active Application Discontinuation
- 2004-06-30 DE DE202004021514U patent/DE202004021514U1/de not_active Expired - Lifetime
- 2004-06-30 AT AT04760180T patent/ATE311271T1/de not_active IP Right Cessation
- 2004-06-30 KR KR1020057025522A patent/KR20060096185A/ko not_active Application Discontinuation
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5954312A (en) * | 1996-01-31 | 1999-09-21 | Siemens Automotive Corporation | Groove means in a fuel injector valve seat |
DE19757117A1 (de) * | 1997-12-20 | 1999-06-24 | Bosch Gmbh Robert | Verfahren zur Herstellung eines Ventilsitzkörpers für ein Brennstoffeinspritzventil und Brennstoffeinspritzventil |
EP0955128B1 (de) * | 1998-05-06 | 2002-07-17 | Ernst Thielenhaus GmbH & Co. KG | Dichtungsanordnung, insbesondere für Brennstoffeinspritzventile in Brennkraftmaschinen und Verfahren zur Herstellung eines Dichtsitzes |
US20020040523A1 (en) * | 2000-06-20 | 2002-04-11 | Harald Goldau | Method of finishing a valve seat for ball valves, in particular for fuel injection valves in internal combustion engines |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9726131B2 (en) * | 2007-01-29 | 2017-08-08 | Mitsubishi Electric Corporation | Fuel injection valve |
US20130068987A1 (en) * | 2010-05-25 | 2013-03-21 | Emerson Process Management (Tianjin) Valve Co., Ltd | Valve trim apparatus having a cavity to receive contaminates from a sealing surface |
US9115814B2 (en) * | 2010-05-25 | 2015-08-25 | Emerson Process Management (Tianjin) Valve Co., Ltd. | Valve trim apparatus having a cavity to receive contaminates from a sealing surface |
Also Published As
Publication number | Publication date |
---|---|
EP1493534A1 (de) | 2005-01-05 |
CN1816421A (zh) | 2006-08-09 |
ES2252730T3 (es) | 2006-05-16 |
DE502004000155D1 (de) | 2006-01-05 |
US20110095222A1 (en) | 2011-04-28 |
ATE311271T1 (de) | 2005-12-15 |
DE202004021514U1 (de) | 2008-07-31 |
BRPI0412136A (pt) | 2006-08-15 |
KR20060096185A (ko) | 2006-09-08 |
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