WO1999061787A1 - Brennstoffeinspritzventil - Google Patents
Brennstoffeinspritzventil Download PDFInfo
- Publication number
- WO1999061787A1 WO1999061787A1 PCT/DE1999/000300 DE9900300W WO9961787A1 WO 1999061787 A1 WO1999061787 A1 WO 1999061787A1 DE 9900300 W DE9900300 W DE 9900300W WO 9961787 A1 WO9961787 A1 WO 9961787A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- perforated
- fuel injection
- valve seat
- perforated disc
- carrier
- Prior art date
Links
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
- F02M61/18—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for
-
- 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
-
- 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
- F02M61/162—Means to impart a whirling motion to fuel upstream or near discharging orifices
Definitions
- the invention relates to a fuel injector according to the preamble of the main claim.
- Fuel injector known to the one
- valve seat body with a valve seat surface and a perforated disc carrier attached to the valve seat body.
- the perforated disc carrier is used to hold a multi-layer perforated disc, manufactured using multilayer electroplating, firmly and securely on the valve seat body by clamping.
- the perforated disc carrier is flat and disk-shaped, has an overall pot-shaped structure and a constant thickness over its entire extent.
- the perforated disk carrier is fastened to the valve seat body with the aid of an annular circumferential weld seam. When the perforated disk carrier is welded on, however, the clamping force of the perforated disk carrier with which the perforated disk is pressed against the valve seat body decreases.
- Perforated disc carriers support discs, support rings or
- Retaining nuts for perforated disks of injection valves or nozzles are e.g. also already known from GB-PS 201,556, DE-OS 41 23 692, DE-OS 44 46 241 or DE-OS 195 27 626, but no measures have been taken to improve the clamping effect by varying the spring stiffness.
- the fuel injector according to the invention with the characterizing features of claim 1 has the advantage that a particularly high quality of the attachment point of the perforated disc carrier to the valve seat body is achieved, which in turn has the result that a very good holding effect of the perforated disc carrier on the perforated disc is achieved, which also is hardly or not at all affected by the fastening of the perforated disc carrier.
- the perforated disk carrier is provided in an edge region surrounding a through opening, which is used directly for holding (clamping) the perforated disk, with moldings which reduce the spring rigidity of the perforated disk carrier. Taking tolerances into account when determining the limiting diameter for the specially shaped edge area, it is ensured that the fastening point (weld seam) is always attached outside the edge area of the perforated disc carrier.
- the spring stiffness of the perforated disc carrier is thinned out or slits deliberately reduced, so that when the perforated disc carrier is pressed onto the valve seat body before welding, it is mainly this less rigid edge area that bends.
- the preload is thus reduced compared to known designs.
- the perforated disk carrier already lies largely without an air gap on the lower end face of the valve seat body in the area of the weld seam to be set, which reduces the thermal relaxation in the weld seam area. Because of this, the clamping effect of the perforated disk carrier on the perforated disk remains very well preserved even after welding.
- the formations in the edge region of the through opening are formed by thinning out or introducing slots.
- the perforated disc carrier is thinned out in such a way that an annular step is formed by embossing either from the upper or from the lower end face.
- perforated disks which are produced by galvanic metal deposition and are made in one piece, the individual functional levels or layers being built up on one another in directly successive deposition process steps.
- Metal perforation is in one piece of the perforated disc; no time-consuming and costly process steps for connecting individual nozzle plates are therefore necessary. It is particularly advantageous to design the perforated disks in the form of so-called S-type disks (S-shaped flow course within the disk) in order to be able to produce extraordinary strange jet shapes. It is optimal for an S-type disc if there is an offset between the inlet openings and the outlet openings.
- S-type disk if there is an offset between the inlet openings and the outlet openings.
- the unusual beam shapes that can be created allow an exact optimal adaptation to given geometries, e.g. B. to different intake manifold cross sections of internal combustion engines. This results in the advantages of a shape-adapted utilization of the available cross-section for the homogeneously distributed, exhaust-reducing mixture introduction and the avoidance of emissions-harmful wall film deposits on the intake manifold wall.
- FIG. 1 shows a partially illustrated injection valve with a first fastening according to the invention of a perforated disk with a perforated disk carrier
- FIG. 2 shows a second example of such a fastening at the valve end
- FIG. 3 shows a top view of the edge region of the perforated disk designed with an anti-rotation device in FIG. 2
- FIG. 4 third example of fastening a perforated disk with a perforated disk carrier at the valve end
- FIG. 5 shows a fourth example of such a fastening at the valve end
- FIG. 6 shows a detail from FIG. 5 with a one obtained by caulking
- FIG. 7 a further perforated disk carrier in section and FIG. 8 the perforated disk carrier according to FIG. 7 in a plan view.
- the injection valve has a tubular valve seat support 1, in which a longitudinal opening 3 is formed concentrically with a valve longitudinal axis 2.
- a longitudinal opening 3 is formed concentrically with a valve longitudinal axis 2.
- a longitudinal opening 3 is formed concentrically with a valve longitudinal axis 2.
- tubular valve needle 5 arranged at its downstream end 6 with a z.
- spherical valve closing body 7 on the circumference of which, for example, five flats 8 are provided for the fuel to flow past, is firmly connected.
- the injection valve is actuated in a known manner, for example electromagnetically.
- a schematically indicated electromagnetic circuit with a solenoid 10, an armature 11 and a core 12 is used for the axial movement of the valve needle 5 and thus for opening against the spring force of a return spring (not shown) or closing the injection valve.
- the armature 11 is connected to the valve closing body 7 opposite end of the valve needle 5 by z.
- a guide opening 15 of a valve seat body 16 is used, which is tightly mounted by welding in the downstream end of the valve seat carrier 1, which is remote from the core 12, in the longitudinal opening 3, which runs concentrically to the longitudinal axis 2 of the valve.
- the valve seat body 16 On its lower end face 17 facing away from the valve closing body 7, the valve seat body 16 is provided with a z. B. cup-shaped and serving as a retaining ring perforated disc carrier 21 concentrically and firmly connected, which thus lies at least with an outer ring region 22 directly on the valve seat body 16.
- the perforated disk carrier 21 has a shape similar to that of well-known cup-shaped spray perforated disks, a central region of the perforated disk carrier 21 being provided with a through opening 20 without a metering function.
- Spray plate is formed, is arranged upstream of the through opening 20 such that it completely covers the through opening 20.
- the perforated disc carrier 21 is designed with an inner base part 24 and an outer holding edge 26.
- the holding edge 26 extends in the axial direction facing away from the valve seat body 16 and is conically bent outwards up to its end.
- the bottom part 24 is from the outer ring area
- valve seat body 16 and the perforated disk carrier 21 are connected, for example, by a circumferential and sealed first weld seam 25 formed by a laser. This type of assembly increases the risk of undesired deformation of the
- Perforated disk carrier 21 avoided in its central region with the through opening 20 and the perforated disk 23 arranged upstream there.
- the perforated disk carrier 21 is further connected in the region of the holding edge 26 to the wall of the longitudinal opening 3 in the valve seat carrier 1, for example by a circumferential and tight second weld seam 30.
- the perforated disk 23 which can be clamped in the area of the passage opening 20 within the circular weld seam 25 between the perforated disk carrier 21 and the valve seat body 16 is, for example, staged.
- An upper perforated disk area 33 which has a smaller diameter than a base area 32, protrudes into a cylindrical outlet opening 31 of the valve seat body 16 following a valve seat surface 29.
- a press fit can also be provided in the area of the perforated disk area 33 / outlet opening 31.
- the radially protruding beyond the perforated disk area 33 and thus clampable base area 32 of the perforated disk 23 rests on the lower end face 17 of the valve seat body 16, so that at this point the bottom part 24 of the perforated disk carrier 21 lies at a short distance from the end face 17.
- a functional level should have a largely constant opening contour over its axial extent.
- the perforated disc carrier 21 is thinned out in the edge region 35 of its central through opening 20, which is to mean that the perforated disc carrier 21 in the edge region 35 of the through opening 20 has at least partially a smaller thickness than over its further extent (ring region 22, holding edge 26).
- the perforated disk carrier 21 is thinned out in its area lying within the weld seam 25 towards the through opening 20 to the extent that the edge area 35 is only approximately half as thick as the rest of the perforated disk carrier 21.
- a step 38 is provided on the lower end face 36 of the perforated disk carrier 21 facing away from the end face 17 of the valve seat body 16 in order to form the thinner edge region 35.
- the thinned or weaker edge region 35 serves directly the clamping of the perforated disk 23.
- the contour of the edge region 35 is achieved, for example, by embossing.
- the weld seam 25 is always applied in the thicker region of the perforated disc carrier 21.
- the spring stiffness of the perforated disk carrier 21 is specifically reduced by the thinning out, so that when the perforated disk carrier 21 is pressed onto the valve seat body 16, this thinned edge area 35 mainly bends before welding.
- the pretension is thus reduced with a constant thickness compared to known constructions.
- Perforated disk carriers 21 in the area of the weld seam 25 to be set already largely without an air gap at the lower end face 17 of the valve seat body 16, which reduces the thermal relaxation in the weld seam area 25. Because of this, the clamping effect remains on the
- the insertion depth of the valve seat part consisting of valve seat body 16, cup-shaped perforated disk carrier 21 and perforated disk 23 into the longitudinal opening 3 determines the size of the stroke of the valve needle 5, since the one end position of the valve needle 5 when the solenoid coil 10 is not excited due to the valve closing body 7 resting on the valve seat surface 29 of the valve seat body 16 is fixed.
- the other end position of the valve needle 5 is determined when the solenoid 10 is excited, for example by the armature 11 resting on the core 12.
- the path between these two end positions of the valve needle 5 thus represents the stroke.
- the spherical valve closing body 7 acts with the conical frustum in the direction of flow Valve seat surface 29 of the valve seat body 16 together, which is formed in the axial direction between the guide opening 15 and the lower outlet opening 31 of the valve seat body 16.
- Fastening the perforated disk 23 to the valve seat body 16 has the advantage that temperature-related deformations are avoided, which could possibly occur in processes such as welding or soldering with a direct attachment of the perforated disk 23.
- the perforated disks 23 shown in FIGS. 1 to 6 are built up in several metallic functional levels by means of galvanic deposition (multilayer electroplating). Because of the deep lithographic, galvanotechnical
- FIG. 2 shows a second exemplary embodiment of a perforated disk 23 clamped with a perforated disk carrier 21.
- the perforated disk 23 is again a flat, circular one
- Component executed that has several, for example three, axially successive functional levels or galvanically deposited layers. While the two lower functional levels or layers built up first form a perforated disk area 33 with the same outside diameter, the upper and last built-up functional level of the perforated disk 23 is designed with a larger outside diameter, so that an externally projecting clamping area 34 is formed. At least one inlet opening is provided in the upper functional level, while in the lower
- the edge region 35 of the perforated disc carrier 21 towards the through opening 20 is again thinned out in order to achieve the advantages already described due to the reduced spring stiffness.
- the edge region 35 is thinned out from the upper end face 37 of the perforated disk carrier 21, that is to say it is provided with a step 38 which is achieved, for example, by embossing.
- the gap in the edge area 35 formed due to the thinning in the case of the perforated disk carrier 21 lying against the valve seat body 16 has, for example, exactly an axial extent which corresponds to the axial thickness of the upper layer of the perforated disk 23 or its clamping area 34.
- the edge area 35 thus engages under the radially projecting clamping area 34 of the perforated disk 23.
- the perforated disk 23, which is clamped to the exact dimension, also extends with its lower perforated disk area 33 exactly through the through opening 20 of the perforated disk carrier 21.
- the perforated disk 23 is already pre-assembled in the perforated disk carrier 21.
- the perforated disk 23 can already be fixed exactly in the perforated disk carrier 21 by pressing, caulking, flanging or gluing.
- FIG. 3 shows a top view of the edge region 35 of the perforated disk 23 in FIG. 2, which is designed with an anti-rotation device.
- a simple anti-rotation device can optionally be provided , which is ensured, for example, by attaching corresponding flats 39, 39 'to the clamping area 34 of the perforated disk 23 and to the perforated disk carrier 21.
- FIG. 4 shows a mixed form of the exemplary embodiments already explained.
- the perforated disk 23 used in the example according to FIG. 4 largely corresponds to that of FIG. 1;
- the perforated disk carrier 21 largely corresponds to that of FIG. 2.
- the perforated disk region 33 consisting of the upper functional levels or layers of the perforated disk 23, protrudes through the through opening 20 of the perforated disk carrier 21, similar to the second exemplary embodiment.
- the lower basic area which is designed with a larger outer diameter than the perforated disk region 33 32 of the perforated disk 23 engages under the edge region 35 of the perforated disk carrier 21. Since the perforated disk 23 is not clamped with the edge region 35 of the perforated disk carrier 21, the perforated disk 23 must be secured by pressing in, caulking, flanging or gluing or possibly even by soldering or Welding done on the perforated disc carrier 21.
- FIG. 5 shows an installation variant in which the perforated disk 23 shown in FIG. 1 is used.
- the perforated disk 23 projects into the outlet opening 31 of the valve seat body 16 with exact dimensions.
- the perforated disk carrier 21 is designed in the version of FIG. 2, that is to say with a thinning (step 38) provided in the edge area 35 from the upper end face 37.
- FIG. 6 shows a detail from FIG. 5 with a perforated disk 23 which has been secured by caulking.
- an anti-twist device to ensure a safe and defined installation position of the perforated disk 23. This can be produced very simply by caulking the edge region 35 of the perforated disc carrier 21 at one point, for example, with a stem-shaped tool 40. Material is shifted to a small extent in such a way that slipping or twisting of the perforated disk 23 is excluded.
- the anti-rotation device can also be achieved in that, for example, a laser point is set in the region of the caulking shown in FIG. 6, by means of which the perforated disk 23 is fixed in the outer base area 32 on the perforated disk carrier 21.
- FIGS. 7 and 8 Another embodiment of a perforated disc carrier 21 is shown in FIGS. 7 and 8.
- the edge region 35 of the perforated disc carrier 21 is not achieved here by thinning out, but rather by introducing a plurality of radially running slots 42.
- the slots 42 are arranged largely in a star shape and are in direct connection with the through opening 20.
- All versions of the perforated disc carrier 21 can be manufactured by punching, embossing and forming.
- the thinning of the edge area 35 is e.g. achieved by embossing, the central through opening 20 after the
- Embossing is punched out.
- the through opening 20 can first be punched, and while the punch is in the through opening 20, the embossing stamp for embossing the edge region 35 can be added.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE59908299T DE59908299D1 (de) | 1998-05-22 | 1999-02-05 | Brennstoffeinspritzventil |
JP2000551149A JP2002516956A (ja) | 1998-05-22 | 1999-02-05 | 燃料噴射弁 |
EP99910101A EP1009931B1 (de) | 1998-05-22 | 1999-02-05 | Brennstoffeinspritzventil |
KR19997012264A KR20010014189A (ko) | 1998-05-22 | 1999-02-05 | 연료분사밸브 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19822896.1 | 1998-05-22 | ||
DE19822896A DE19822896A1 (de) | 1998-05-22 | 1998-05-22 | Brennstoffeinspritzventil |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1999061787A1 true WO1999061787A1 (de) | 1999-12-02 |
Family
ID=7868581
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DE1999/000300 WO1999061787A1 (de) | 1998-05-22 | 1999-02-05 | Brennstoffeinspritzventil |
Country Status (6)
Country | Link |
---|---|
US (1) | US20020060257A1 (de) |
EP (1) | EP1009931B1 (de) |
JP (1) | JP2002516956A (de) |
KR (1) | KR20010014189A (de) |
DE (2) | DE19822896A1 (de) |
WO (1) | WO1999061787A1 (de) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10142974B4 (de) * | 2001-09-01 | 2010-04-29 | Robert Bosch Gmbh | Brennstoffeinspritzventil |
DE10240880B4 (de) * | 2002-09-04 | 2016-12-01 | Robert Bosch Gmbh | Aktorverbindung an Kraftstoffinjektoren von Verbrennungskraftmaschinen |
DE10314672B4 (de) * | 2003-04-01 | 2016-12-22 | Robert Bosch Gmbh | Verfahren zur Herstellung einer Lochscheibe |
JP6744312B2 (ja) * | 2015-08-07 | 2020-08-19 | 株式会社エンプラス | 燃料噴射装置用ノズルプレートの取付構造 |
DE102016222908A1 (de) * | 2016-11-21 | 2018-05-24 | Robert Bosch Gmbh | Injektor mit dreiteiligem Ventilsitz |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB201556A (en) | 1922-07-25 | 1924-03-06 | Atlas Diesel Ab | Improvements in or relating to fuel atomizers for internal combustion engines |
DE4123692A1 (de) | 1991-07-17 | 1993-01-21 | Bosch Gmbh Robert | Brennstoffeinspritzventil |
DE4446241A1 (de) | 1994-12-23 | 1996-06-27 | Bosch Gmbh Robert | Brennstoffeinspritzventil |
DE19527626A1 (de) | 1995-07-28 | 1997-01-30 | Bosch Gmbh Robert | Brennstoffeinspritzventil |
DE19639506A1 (de) | 1996-09-26 | 1998-04-02 | Bosch Gmbh Robert | Lochscheibe und Ventil mit einer Lochscheibe |
-
1998
- 1998-05-22 DE DE19822896A patent/DE19822896A1/de not_active Withdrawn
-
1999
- 1999-02-05 KR KR19997012264A patent/KR20010014189A/ko not_active Application Discontinuation
- 1999-02-05 EP EP99910101A patent/EP1009931B1/de not_active Expired - Lifetime
- 1999-02-05 JP JP2000551149A patent/JP2002516956A/ja not_active Withdrawn
- 1999-02-05 DE DE59908299T patent/DE59908299D1/de not_active Expired - Lifetime
- 1999-02-05 WO PCT/DE1999/000300 patent/WO1999061787A1/de not_active Application Discontinuation
- 1999-02-05 US US09/463,365 patent/US20020060257A1/en not_active Abandoned
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB201556A (en) | 1922-07-25 | 1924-03-06 | Atlas Diesel Ab | Improvements in or relating to fuel atomizers for internal combustion engines |
DE4123692A1 (de) | 1991-07-17 | 1993-01-21 | Bosch Gmbh Robert | Brennstoffeinspritzventil |
DE4446241A1 (de) | 1994-12-23 | 1996-06-27 | Bosch Gmbh Robert | Brennstoffeinspritzventil |
DE19527626A1 (de) | 1995-07-28 | 1997-01-30 | Bosch Gmbh Robert | Brennstoffeinspritzventil |
DE19639506A1 (de) | 1996-09-26 | 1998-04-02 | Bosch Gmbh Robert | Lochscheibe und Ventil mit einer Lochscheibe |
Also Published As
Publication number | Publication date |
---|---|
EP1009931A1 (de) | 2000-06-21 |
US20020060257A1 (en) | 2002-05-23 |
DE19822896A1 (de) | 1999-11-25 |
KR20010014189A (ko) | 2001-02-26 |
DE59908299D1 (de) | 2004-02-19 |
EP1009931B1 (de) | 2004-01-14 |
JP2002516956A (ja) | 2002-06-11 |
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