EP0675283B1 - Einspritzventil - Google Patents
Einspritzventil Download PDFInfo
- Publication number
- EP0675283B1 EP0675283B1 EP95103810A EP95103810A EP0675283B1 EP 0675283 B1 EP0675283 B1 EP 0675283B1 EP 95103810 A EP95103810 A EP 95103810A EP 95103810 A EP95103810 A EP 95103810A EP 0675283 B1 EP0675283 B1 EP 0675283B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- valve
- perforated
- punching
- injection valve
- 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
Links
- 238000002347 injection Methods 0.000 title claims description 21
- 239000007924 injection Substances 0.000 title claims description 21
- 239000007921 spray Substances 0.000 claims description 20
- 238000004080 punching Methods 0.000 claims description 18
- 239000000446 fuel Substances 0.000 claims description 5
- 238000002485 combustion reaction Methods 0.000 claims description 3
- 239000000463 material Substances 0.000 description 12
- 238000000034 method Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000002829 reductive effect Effects 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000007373 indentation Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000000284 resting effect Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000005482 strain hardening Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
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
- F02M51/0682—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a cylindrically or partly cylindrically shaped armature, e.g. entering the winding; having a plate-shaped or undulated armature entering the winding the armature having an elongated valve body attached thereto the body being hollow and its interior communicating with the fuel flow
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
- F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
- F02M61/166—Selection of particular materials
-
- 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
- F02M61/18—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for
- F02M61/1853—Orifice plates
-
- 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
- Y10T29/49428—Gas and water specific plumbing component making
- Y10T29/49432—Nozzle making
Definitions
- the invention is based on an injection valve according to the Genus of the main claim. From DE-OS 40 26 721 already known an injection valve that is downstream of it Valve seat surface has a perforated disc.
- the perforated disc has several spray holes through which a medium such as Can leak fuel.
- the spray holes are through Eroding introduced in the perforated disc.
- perforated disks on injection valves that have injection holes made by punching.
- Such an injection valve according to WO-A-9400686 forms the preamble of claim 1.
- The, for example, cup-shaped perforated disks represent a thin sheet and, depending on the material, have a tensile strength of 400 to 600 N / mm 2 .
- the punching of the spray holes in the perforated disk has the result that a punching indentation forms on a first surface on which the punch hits the perforated disk, while on a second surface on which the punch emerges from the perforated disk again on A raised area in the form of a ridge arises.
- This disadvantageous ridge cannot be kept constant in many punching processes, so that relatively large flow and jet angle scattering can occur. In large series production, however, these variations should be kept as low as possible. Grinding the punch burrs would represent an additional process that further increases manufacturing costs.
- Embodiments of the invention are in the drawing shown in simplified form and in the following Description explained in more detail.
- 1 shows it partially illustrated injection valve
- Figure 2 a Perforated disk
- Figure 3 is a partially shown perforated disk low hardness with a spray hole according to the state of the Technique
- Figure 4 is a perforated disc of greater hardness with a Spray hole
- Figure 5 with a perforated disk of greater hardness a spray hole that is opposite to the later one Flow direction is punched.
- a valve is shown in FIG. 1 as an exemplary embodiment the shape of an injector for Fuel injection systems from mixture compressors spark-ignited internal combustion engines partially shown.
- the injector has a tubular valve seat support 1, in which a valve axis 2 concentric Longitudinal opening 3 is formed.
- a valve axis 2 concentric Longitudinal opening 3 is formed in the longitudinal opening 3 .
- tubular valve needle 5 arranged on the its downstream end 6 with a z.
- the injection valve is actuated in a known manner Way, for example electromagnetic.
- a return spring (not shown) or An indicated closing serves to close the injection valve electromagnetic circuit with a magnetic coil 10, one Anchor 11 and a core 12.
- the anchor 11 is with the End of valve needle 5 facing away from valve closing body 7 through z. B. connected a weld using a laser and aligned with the core 12.
- Valve seat body 16 To guide the valve closing body 7 during the A guide opening 15 serves for axial movement Valve seat body 16.
- the core 11 opposite end of the valve seat support 1 is in the concentric to the longitudinal axis 2 of the valve Longitudinal opening 3 of the cylindrical valve seat body 16 through Welding tightly assembled.
- Valve closing body 7 facing away from the lower end face 17 the valve seat body 16 with a bottom part 20 of a z.
- valve seat body 16 and perforated disk 21 takes place, for example, by a circumferential and dense, first weld seam 22 formed by a laser.
- first weld seam 22 formed by a laser.
- Perforated disk 21 On the bottom part 20 of the pot-shaped, for example Perforated disk 21 closes a circumferential holding edge 26 on.
- the holding edge 26 exerts a radial spring action on the Wall of the longitudinal opening 3.
- the holding edge 26 of the Perforated disk 21 is with the wall of the longitudinal opening 3rd for example by a circumferential and dense second Weld 30 connected.
- the insertion depth of the valve seat body 16 and pot-shaped perforated disk 21 existing valve seat part in the longitudinal opening 3 determines the default stroke Valve needle 5, since the one end position of the valve needle 5 at non-excited solenoid 10 by the system of Valve closing body 7 on a valve seat surface 29 of the Valve seat body 16 is fixed.
- the other end position the valve needle 5 is when the solenoid 10 is excited for example by the anchor 11 resting against the core 12 fixed.
- the path between these two end positions Valve needle 5 thus represents the stroke.
- the spherical valve closing body 7 acts with the in Direction of flow tapering in the shape of a truncated cone Valve seat surface 29 of the valve seat body 16 together, the in the axial direction between the guide opening 15 and the lower end face 17 of the valve seat body 16 is formed is.
- valve seat support 1 On the circumference of the valve seat support 1 is on his downstream, the solenoid 10 facing end one Protective cap 40 arranged and by means of, for example Snap connection connected to the valve seat support 1.
- a Sealing ring 41 serves to seal between the circumference of the Injector and one, not shown Valve holder, for example the intake line of the Internal combustion engine.
- FIG. 2 shows the perforated disk 21 with its central one Area 24 arranged spray holes 25.
- Die for example, four spray holes 25 are located e.g. B. symmetrical about the valve longitudinal axis 2 in the form of corner points of a square and thus each have the equal distance from each other and to the valve longitudinal axis 2.
- Das Bottom part 20 of the perforated disc 21 has the upper end face 44, which corresponds to a second flat surface, and one opposite lower end face 19, that of a first corresponds to a flat surface.
- the spray holes 25 are Injector according to the invention in the opposite Direction introduced.
- the punching direction is indicated by a Arrow 45 is displayed.
- the stamps of the punching tool So first hit the first surface 19 of the bottom part 20 of the perforated disc 21, which in the later installation position Perforated disk 21 on the injection valve downstream of the second Surface 44 lies, and penetrate the material of the Perforated disc 21 to the second surface 44, where it from the Leak material.
- the punching direction thus runs opposite to the medium flow direction ( Figure 2).
- FIG. 3 shows a spray hole 25 in a perforated disk 21, as is the case with punching which has been customary to date.
- the known perforated disks have a tensile strength of 400 to 600 N / mm 2 .
- the relatively low hardness resulting from these values is the reason why a punch feed 50, that is to say a cross-sectional enlargement of the injection hole 25, occurs on the first surface 19 due to the entry of the punch, while a burr 51 on the second surface 44 extends over the Surface 44 protrudes, arises.
- the consequences of these phenomena at the spray hole 25, which are not shown to scale, are comparatively large flow and jet angle scatterings.
- FIG. 4 shows a spray hole 25 in the perforated disk 21, which is made of a material of greater hardness than the material of the perforated disk 21 according to FIG. 3.
- the perforated disk 21 now has a tensile strength of> 800 N / mm 2 , which corresponds approximately to a Vickers hardness of> 300 HV1.
- the usual perforated disks 21 can be brought to a greater material hardness, for example, by work hardening.
- the greater material hardness means that there is little or no negligible punching or burring. Due to the greater brittleness of the material, there is no burr formation, but there is a punch breakout 52 at the injection hole 25, and the material breaks out on the exit surface of the punch, that is to say on the second surface 44.
- This punch cutout 52 slightly enlarges the cross section of the spray hole 25 only in the vicinity of the second surface 44. The scatter of the flow rates can be reduced as a result; the beam angle scattering is retained by the punch cutout 52 on the
- FIG. 5 shows a perforated disk 21 with a spray hole 25, which was punched in the opposite direction to the later medium flow direction, namely from the first surface 19 to the second surface 44, as indicated by the arrow 45 for the punching direction.
- the material properties are the same as for the perforated disk 21 shown in FIG. 4, the tensile strength of the material is therefore also> 800 N / mm 2 .
- the punch cutout 52 created by the punching lies on the second surface 44 of the perforated disk 21, but in the installed state in the injection valve faces the valve closing body 7.
- the transition from the spraying hole 25 to the first surface 19 is therefore relatively sharp-edged and therefore has almost no deformations which cause negative effects when spraying.
- the beam angle scatter advantageously remains very low due to this arrangement.
- the variation in the flow rate can be reduced even further by varying the punch diameter of the punching tool.
- the configuration of the perforated disk 21 according to the invention is possible with every shape of the perforated disc, also with Perforated disks that do not have a holding edge 26.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Fuel-Injection Apparatus (AREA)
- Powder Metallurgy (AREA)
Description
Claims (2)
- Einspritzventil, insbesondere Brennstoffeinspritzventil für Brennstoffeinspritzanlagen von Brennkraftmaschinen, mit einer Lochscheibe (21), die eine erste Fläche (19) und eine zweite Fläche (25) aufweist und wenigstens ein Abspritzloch (44) besitzt, das durch Stanzen gefertigt ist, wobei die Stanzrichtung von der ersten Fläche ausgehend zur zweiten Fläche hin ist, dadurch gekennzeichnet, daß die Lochscheibe (21) eine Zugfestigkeit von > 800 N/mm2 hat und die Lochscheibe (21) so in das Einspritzventil eingebaut ist, daß die erste Fläche (19) stromabwärts der zweiten Fläche (44) liegt.
- Einspritzventil nach Anspruch 1, dadurch gekennzeichnet, daß die Zugfestigkeit der Lochscheibe (21) von > 800 N/mm2 zusätzlich einer Vickershärte von > 300 HV1 entspricht.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4411554A DE4411554A1 (de) | 1994-04-02 | 1994-04-02 | Einspritzventil |
DE4411554 | 1994-04-02 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0675283A1 EP0675283A1 (de) | 1995-10-04 |
EP0675283B1 true EP0675283B1 (de) | 1998-06-03 |
Family
ID=6514553
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP95103810A Expired - Lifetime EP0675283B1 (de) | 1994-04-02 | 1995-03-16 | Einspritzventil |
Country Status (5)
Country | Link |
---|---|
US (1) | US5626295A (de) |
EP (1) | EP0675283B1 (de) |
JP (1) | JPH07279798A (de) |
DE (2) | DE4411554A1 (de) |
ES (1) | ES2117317T3 (de) |
Families Citing this family (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5984208A (en) * | 1997-11-03 | 1999-11-16 | Caterpillar Inc. | Fuel injector having a press-in valve seat |
US6247656B1 (en) | 2000-04-26 | 2001-06-19 | Resources Conservation, Inc. | Shower head |
JP2002054533A (ja) * | 2000-08-16 | 2002-02-20 | Unisia Jecs Corp | 燃料噴射弁及び該燃料噴射弁に用いるノズルプレートの製造方法 |
DE10042956A1 (de) * | 2000-08-31 | 2002-03-21 | Siemens Ag | Düsenkörper mit Schutzkappe |
DE10246403B4 (de) * | 2001-10-05 | 2008-11-27 | Denso Corp., Kariya-shi | Verfahren zum Herstellen einer Düsenlochplatte für eine Einspritzdüse und Einspritzdüse mit einer solchen Düsenlochplatte |
US6817545B2 (en) | 2002-01-09 | 2004-11-16 | Visteon Global Technologies, Inc. | Fuel injector nozzle assembly |
US6789406B2 (en) | 2002-03-15 | 2004-09-14 | Siemens Vdo Automotive Corporation | Methods of forming angled orifices in an orifice plate |
US6945478B2 (en) | 2002-03-15 | 2005-09-20 | Siemens Vdo Automotive Corporation | Fuel injector having an orifice plate with offset coining angled orifices |
US7490784B2 (en) * | 2002-06-10 | 2009-02-17 | Siemens Aktiengesellschaft | Injector for injecting fuel |
US20040163254A1 (en) * | 2002-12-27 | 2004-08-26 | Masanori Miyagawa | Method for manufacturing injection hole member |
US20060107526A1 (en) * | 2004-11-22 | 2006-05-25 | Von Bacho Paul S Iii | Process for inserting flow passages in a work piece |
CN107842453B (zh) * | 2016-09-20 | 2022-04-12 | 罗伯特·博世有限公司 | 用于进气口燃料喷射器的燃料喷射模块 |
US10370177B2 (en) | 2016-11-22 | 2019-08-06 | Summit Packaging Systems, Inc. | Dual component insert with uniform discharge orifice for fine mist spray |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57131567A (en) * | 1981-01-16 | 1982-08-14 | Ricoh Co Ltd | Nozzle for ink jet printer |
DE3567062D1 (en) * | 1985-10-22 | 1989-02-02 | Voest Alpine Automotive | Method of manufacturing an injection nozzle housing |
US4699323A (en) * | 1986-04-24 | 1987-10-13 | General Motors Corporation | Dual spray cone electromagnetic fuel injector |
US4923169A (en) * | 1987-12-23 | 1990-05-08 | Siemens-Bendix Automotive Electronics L.P. | Multi-stream thin edge orifice disks for valves |
US4934653A (en) * | 1987-12-23 | 1990-06-19 | Siemens-Bendix Automotive Electronics L.P. | Multi-stream thin edge orifice disks for valves |
GB8817774D0 (en) * | 1988-07-26 | 1988-09-01 | Lucas Ind Plc | Fuel injectors for i c engines |
US5052624A (en) * | 1988-03-11 | 1991-10-01 | Possis Corporation | Ultra high pressure water cleaning tool |
DE4026721A1 (de) * | 1990-08-24 | 1992-02-27 | Bosch Gmbh Robert | Einspritzventil und verfahren zur herstellung eines einspritzventils |
DE4221185A1 (de) * | 1992-06-27 | 1994-01-05 | Bosch Gmbh Robert | Spritzlochscheibe für ein Ventil und Verfahren zur Herstellung |
US5350119A (en) * | 1993-06-01 | 1994-09-27 | Siemens Automotive L.P. | Clad metal orifice disk for fuel injectors |
-
1994
- 1994-04-02 DE DE4411554A patent/DE4411554A1/de not_active Withdrawn
-
1995
- 1995-03-16 EP EP95103810A patent/EP0675283B1/de not_active Expired - Lifetime
- 1995-03-16 ES ES95103810T patent/ES2117317T3/es not_active Expired - Lifetime
- 1995-03-16 DE DE59502382T patent/DE59502382D1/de not_active Expired - Fee Related
- 1995-04-03 JP JP7077963A patent/JPH07279798A/ja not_active Abandoned
- 1995-04-03 US US08/415,272 patent/US5626295A/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
DE4411554A1 (de) | 1995-10-05 |
JPH07279798A (ja) | 1995-10-27 |
ES2117317T3 (es) | 1998-08-01 |
DE59502382D1 (de) | 1998-07-09 |
US5626295A (en) | 1997-05-06 |
EP0675283A1 (de) | 1995-10-04 |
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