WO2006040246A1 - Brennstoffeinspritzventil - Google Patents
Brennstoffeinspritzventil Download PDFInfo
- Publication number
- WO2006040246A1 WO2006040246A1 PCT/EP2005/054698 EP2005054698W WO2006040246A1 WO 2006040246 A1 WO2006040246 A1 WO 2006040246A1 EP 2005054698 W EP2005054698 W EP 2005054698W WO 2006040246 A1 WO2006040246 A1 WO 2006040246A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- fuel injection
- injection valve
- valve according
- diameter
- valve seat
- 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
- F02M61/1853—Orifice plates
Definitions
- the invention relates to a fuel injection valve according to the preamble of the main claim.
- DE 4221 185 A1 already discloses a fuel injection valve which has a perforated disc with a plurality of outlet openings downstream of a fixed valve seat.
- the perforated disc is initially provided with at least one outlet opening by punching, which runs parallel to the valve longitudinal axis. Then, the perforated disc is plastically deformed in its central region, which has the outlet openings, by deep drawing, so that the outlet openings extend inclined relative to the longitudinal axis of the valve and engage in
- a fuel injection valve is already known in which a perforated disc with a plurality of outlet openings is provided downstream of the valve seat.
- an inlet opening with a larger diameter is formed between an outlet opening in the valve seat body and the perforated disk, which forms an annular inflow cavity for the outlet openings.
- the outlet openings of the perforated disc are in direct flow communication with the inflow opening and the annular inflow cavity and are thereby from the upper boundary of the inflow opening covered. In other words, there is a complete offset from the outlet port defining the inlet of the inflow port and the outlet ports.
- valve seat body should in no case limit or cover the inlet openings in the upper functional level of the perforated disc.
- the fuel injection valve according to the invention with the characterizing features of the main claim has the advantage that in a simple manner uniform atomization of the fuel is achieved, with a particularly high quality of preparation and Zerstäubungsgüte is achieved with very small fuel droplets.
- This is achieved in an advantageous manner in that downstream of a valve seat, a perforated disc is provided as atomizing disc with a specific geometry of the outlet openings.
- fuel sprays can be sprayed off with an atomization quality which is about 20 ⁇ m for the SMD, the so-called Sauter Mean Diameter of the fuel droplets, as an essential measure of the atomization quality.
- the horizontal velocity components of the flow entering the outlet openings are not obstructed by the wall of the respective outlet opening at the entrance level, so that the fuel jet, when leaving the outlet opening, has the full intensity of the horizontal components generated in the onflow cavity and therefore fanned with maximum atomization.
- an inflow opening with the annular Anströmhohlraum is provided, which is greater than an outlet opening downstream of the valve seat.
- the valve seat body already assumes the function of influencing the flow in the perforated disk.
- the formation of the inflow opening achieves an S-blow in the flow for atomization improvement of the fuel, since the valve-seat body with the upper boundary of the inflow opening covers the outlet openings of the perforated disk.
- the perforated disks can be produced in a reproducible manner in an extremely precise and cost-effective manner in very large numbers simultaneously.
- this production allows an extremely large design freedom, since the contours of the openings in the perforated disc can be selected freely.
- FIG. 1 shows a partially illustrated injection valve
- Figure 2 shows the detail II in Figure 1 with a Anströmhohlraum in the valve seat body and a plurality of outlet openings perforated disc in an enlarged view
- Figure 3 shows a first embodiment of an inventively shaped outlet opening
- Figure 4 shows a second embodiment an outlet opening formed according to the invention
- FIGS. 5A to 5C show three production steps for producing a perforated disk according to the invention in the region of an outlet opening.
- FIG. 1 is shown as an embodiment, a valve in the form of an injection valve for fuel injection systems of mixture-compression spark-ignition internal combustion engines partially.
- the injection valve has a tubular valve seat carrier 1, which only schematically indicates a part of a valve housing and in which a longitudinal opening 3 is formed concentrically to a valve longitudinal axis 2.
- a longitudinal opening 3 is formed concentrically to a valve longitudinal axis 2.
- Spherical valve closing body 7 on whose circumference, for example, five flats 8 are provided for flowing past the fuel, is firmly connected.
- the actuation of the injection valve takes place in a known manner, for example electromagnetically.
- a schematically indicated electromagnetic circuit with a solenoid 10, an armature 11 and a core 12.
- the armature 11 is connected to the valve closing body. 7 opposite end of the valve needle 5 by eg a trained by a laser weld and aligned with the core 12.
- valve seat body 16 In the downstream end of the valve seat carrier 1 is a valve seat body 16, e.g. tightly assembled by welding. On its lower end face 17 facing away from the valve closing body 7, the valve seat body 16 is stepped, with a depression 20 being provided in a middle region around the valve longitudinal axis 2, in which a flat, single-pored perforated disk 23 is introduced.
- the perforated disc 23 has a plurality of outlet openings 24, ideally up to four hundred outlet openings 24 due to the small opening widths.
- an inflow opening 19 Upstream of the recess 20 and thus of the outlet openings 24 of the perforated disc 23, an inflow opening 19 is provided in the valve seat body 16, via which the individual outlet openings 24 are flown.
- the inflow opening 19 has a
- Diameter which is greater than the opening width of an outlet opening 27 in the valve seat body 16, from which the fuel flows incoming into the inflow opening 19 and ultimately into the outlet openings 24.
- the inflow opening 19 is designed in the immediate inflow region of the outlet openings 24 with a special geometry.
- the annular region of the inflow opening 19 which is larger in diameter relative to the outlet opening 27 is shown enlarged in FIG. 2 and is referred to below as the inflow cavity 26.
- valve seat body 16 and perforated disc 23 are effected for example by a circumferential and dense, formed by a laser weld 25, which is placed outside of the inflow opening 19. After attachment of the perforated disc 23, this is sunk in the recess 20 opposite the end face 17th
- the insertion depth of the valve seat body 16 with the perforated disc 23 in the L Lucassöfmung 3 determines the size of the stroke of the valve needle 5, since the one end position of the valve needle 5 with non-energized solenoid 10 by the system of the valve closing body 7 at a downstream conically tapered valve seat surface 29 of the valve seat body 16 is set.
- the other end position of the valve needle 5 is fixed in the excited magnet coil 10, for example, by the system of the armature 11 to the core 12. The path between these two end positions of the valve needle 5 thus represents the hub.
- the outlet openings 24 of the perforated disc 23 are in direct flow communication with the inflow opening 19 and the annular inflow cavity 26 and are thereby covered by the upper boundary of the inflow opening 19. In other words, there is a complete offset of the outlet opening 27 and the outlet openings 24 defining the inlet of the inflow opening 19. Due to the radial offset of the outlet openings 24 with respect to the outlet opening 27 results in an S-shaped flow pattern of the medium, here the fuel.
- the perforated disc 23 is produced by means of galvanic metal deposition, wherein the production of the single-layer perforated disc 23 is particularly advantageous with the technique of the so-called lateral overgrowth, which is explained in more detail with reference to FIGS. 5A to 5C.
- FIG. 2 shows an enlarged section II in FIG. 1 for clarifying the geometry of the onflow cavity 26 between a boundary surface 30 of the valve seat body 16 and the perforated disk 23 and the geometry of the outlet openings 24 in the perforated disk 23
- Valve seat body 16 is configured, for example, such that the boundary surface 30, starting from the outlet opening 27, slopes away from the perforated disc 23 in a radially outwardly inclined manner.
- entry planes 31 of the outlet openings 24, which extend perpendicular to the valve longitudinal axis 2 have an ever smaller height of the onflow cavity 26 (decrease in the height of the oncoming cavity 26, for example from 100 ⁇ m to 30 ⁇ m) and the flow on the way to the radially outer outlet openings 24 is constantly accelerated.
- the up to four hundred outlet openings 24 are arranged, for example, on a plurality of concentric circular paths in the perforated disc 23.
- the distances between the individual outlet openings 24 are, for example, about 120 to 150 ⁇ m.
- the outlet openings 24 ideally have a trumpet-shaped contour, wherein an upstream inflow region 33 has a cylindrical cross-section.
- the inflow region 33 has a significantly larger diameter than an immediately following opening region of the actual trumpet-shaped outlet opening 24.
- FIGS. 3 and 4 illustrate two exemplary embodiments of outlet openings 24 formed according to the invention.
- the thickness Hl of the entire perforated disc 23 is about 50 to 100 microns.
- the inflow region 33 of the outlet opening 24 only has a height H2 of approximately 3 to 5 ⁇ m.
- the diameter D1 of the inflow region 33 of the outlet opening 24 is e.g. in the order of about 100 to 150 microns and is thus greater than the thickness Hl of the perforated disc 23. In this diameter-large inflow 33 follows so after about 3 to 5 microns axial length of the
- Outlet opening 24 sharp-edged downstream a significantly smaller diameter portion having a diameter D2 of only about 30 to 100 microns.
- D2 is thus the narrowest diameter of the entire outlet opening 24.
- the outlet opening 24 expands, for example, continuously curved, in particular in a trumpet shape with a constant radius R of the curvature of the wall in the downstream direction.
- a diameter D3 at the exit plane 34 of the outlet opening 24 is achieved, which largely corresponds to the diameter D1 of the inlet plane 31 and thus to the inflow region 33 and is therefore also approximately 100 to 150 ⁇ m.
- the exemplary embodiment shown in FIG. 4 differs from the outlet opening 24 illustrated in FIG.
- the trumpet-shaped opening region is subdivided into two sections, a first upstream section 35 having a substantially cylindrical contour, while the second downstream section 36 funnel-shaped contour possesses.
- the first cylindrical portion 35 has a length H3 of approximately 20 to 50 ⁇ m.
- the radii R of the curvatures of the walls of both embodiments of the outlet openings 24 are ideally constant and have their center exactly in the lower boundary angle of the inflow 33rd
- FIGS. 5A to 5C explain the production steps of the production of the perforated disk 23 according to the invention, in particular in the region of an outlet opening 24.
- a substrate body 37 On a substrate body 37, two photoresist layers 38, 39 are deposited on each other.
- the second lacquer layer 39 is applied only after the masking, exposure and patterning of the first lacquer layer 38.
- both resist layers 38, 39 are developed in one step, i. Unexposed areas of the paint layers 38, 39 are removed by wet-chemical means.
- the coater tower 40 has a significantly larger diameter than in the second lacquer layer 39, which, however, is applied at a significantly greater height.
- a next process step metal is electroplated onto the substrate body 37 around the paint towers 40 in a one-step process.
- the electroplating layer 41 initially grows up from the substrate body 37 on the first lacquer layer 38, and overgrows this first lacquer layer 38 on its surface until the electroplating layer 41 completely touches the circumference of the second lacquer layer 39.
- the electroplating is stopped at the moment in which a small galvanic layer thickness is present at the periphery of the second lacquer layer 39.
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 (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/664,858 US20090200402A1 (en) | 2004-10-09 | 2005-09-20 | Fuel injector |
EP05794491A EP1799996B1 (de) | 2004-10-09 | 2005-09-20 | Brennstoffeinspritzventil |
CN2005800341857A CN101035980B (zh) | 2004-10-09 | 2005-09-20 | 燃料喷射阀 |
JP2007535135A JP4646256B2 (ja) | 2004-10-09 | 2005-09-20 | 燃料噴射弁 |
DE502005009285T DE502005009285D1 (de) | 2004-10-09 | 2005-09-20 | Brennstoffeinspritzventil |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102004049280.8 | 2004-10-09 | ||
DE102004049280A DE102004049280A1 (de) | 2004-10-09 | 2004-10-09 | Brennstoffeinspritzventil |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2006040246A1 true WO2006040246A1 (de) | 2006-04-20 |
Family
ID=35429430
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2005/054698 WO2006040246A1 (de) | 2004-10-09 | 2005-09-20 | Brennstoffeinspritzventil |
Country Status (6)
Country | Link |
---|---|
US (1) | US20090200402A1 (de) |
EP (1) | EP1799996B1 (de) |
JP (1) | JP4646256B2 (de) |
CN (1) | CN101035980B (de) |
DE (2) | DE102004049280A1 (de) |
WO (1) | WO2006040246A1 (de) |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4623175B2 (ja) * | 2008-09-08 | 2011-02-02 | トヨタ自動車株式会社 | 内燃機関の燃料噴射弁 |
DE102008042116B4 (de) * | 2008-09-15 | 2019-12-24 | Robert Bosch Gmbh | Ventil, zum Zerstäuben von Fluid |
JPWO2010055927A1 (ja) * | 2008-11-14 | 2012-04-12 | 日立オートモティブシステムズ株式会社 | 燃料噴射装置 |
DE102010029298A1 (de) * | 2010-05-26 | 2011-12-01 | Robert Bosch Gmbh | Ventilanordnung zur Dosierung eines fluiden Mediums in einen Abgasstrang einer Brennkraftmaschine |
KR101337713B1 (ko) * | 2012-12-20 | 2013-12-06 | 주식회사 현대케피코 | 연료 미립화 밸브 시트 바디를 구비한 차량용 고압 직분식 인젝터 |
DE112013006953B4 (de) * | 2013-04-16 | 2023-07-06 | Mitsubishi Electric Corporation | Brennstoffeinspritzventil |
US10047713B2 (en) * | 2013-11-11 | 2018-08-14 | Enplas Corporation | Attachment structure of fuel injection device nozzle plate |
DE102013225948A1 (de) * | 2013-12-13 | 2015-06-18 | Continental Automotive Gmbh | Düsenkopf und Fluid-Einspritzventil |
DE102015210487A1 (de) | 2015-06-09 | 2016-12-15 | Robert Bosch Gmbh | Spritzlochbauteil einer Einspritzvorrichtung |
WO2019133585A1 (en) * | 2017-12-26 | 2019-07-04 | 3M Innovative Properties Company | Fuel injector nozzle structure with choked through-hole outlet opening |
US10724486B2 (en) * | 2018-03-21 | 2020-07-28 | Delphi Technologies Ip Limited | Fluid injector having a director plate |
EP4170154A1 (de) * | 2021-10-21 | 2023-04-26 | Heinz Hänggi Stanztechnik | Zerstäuberscheibe und verfahren zum herstellen einer zerstäuberscheibe |
Citations (6)
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DE19607288A1 (de) * | 1995-03-29 | 1996-10-02 | Bosch Gmbh Robert | Verfahren zur Herstellung einer Lochscheibe |
DE10300313A1 (de) * | 2002-01-09 | 2003-07-24 | Visteon Global Tech Inc | Einspritzdüsenbaugruppe |
DE10303859A1 (de) * | 2002-01-31 | 2003-08-14 | Visteon Global Tech Inc | Düsenbaugruppe zur Einspritzung und Verwirbelung von Kraftstoff |
DE10343597A1 (de) * | 2002-09-25 | 2004-04-15 | Siemens Vdo Automotive Corporation, Auburn Hills | Sprühmustersteuerung mit Winkelausrichtung in einem Kraftstoffeinspritzventil und Verfahren |
US20040173693A1 (en) * | 2000-06-20 | 2004-09-09 | Ngk Insulators, Ltd. | Liquid droplet ejection apparatus and liquid droplet ejecting method |
WO2005064149A1 (de) * | 2003-12-23 | 2005-07-14 | Robert Bosch Gmbh | Brennstoffeinspritzventil |
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US4907748A (en) * | 1988-08-12 | 1990-03-13 | Ford Motor Company | Fuel injector with silicon nozzle |
DE4104019C1 (de) * | 1991-02-09 | 1992-04-23 | Robert Bosch Gmbh, 7000 Stuttgart, De | |
DE4409848A1 (de) * | 1994-03-22 | 1995-10-19 | Siemens Ag | Vorrichtung zur Zumessung und Zerstäubung von Fluiden |
JP3560174B2 (ja) * | 1994-05-17 | 2004-09-02 | 株式会社デンソー | 流体噴射ノズル及びそれを用いた燃料噴射弁 |
US5685491A (en) * | 1995-01-11 | 1997-11-11 | Amtx, Inc. | Electroformed multilayer spray director and a process for the preparation thereof |
DE19703200A1 (de) * | 1997-01-30 | 1998-08-06 | Bosch Gmbh Robert | Brennstoffeinspritzventil |
DE19847460A1 (de) * | 1998-10-15 | 2000-04-20 | Bosch Gmbh Robert | Kraftstoffeinspritzdüse für selbstzündende Brennkraftmaschinen |
JP2000199468A (ja) * | 1998-12-28 | 2000-07-18 | Moritex Corp | 内燃機関の燃料噴射装置および燃料噴射方法 |
JP2001027169A (ja) * | 1999-07-15 | 2001-01-30 | Unisia Jecs Corp | 燃料噴射弁 |
DE19937961A1 (de) * | 1999-08-11 | 2001-02-15 | Bosch Gmbh Robert | Brennstoffeinspritzventil und Verfahren zur Herstellung von Austrittsöffnungen an Ventilen |
JP4097056B2 (ja) * | 2000-03-17 | 2008-06-04 | 株式会社デンソー | 燃料噴射弁 |
DE10118273A1 (de) * | 2001-04-12 | 2002-10-17 | Bosch Gmbh Robert | Brennstoffeinspritzventil |
JP3933545B2 (ja) * | 2002-08-27 | 2007-06-20 | 株式会社日本自動車部品総合研究所 | 燃料噴射ノズルおよびそれを用いた燃料噴射装置 |
JP4058377B2 (ja) * | 2003-05-09 | 2008-03-05 | 株式会社デンソー | 燃料噴射弁 |
US7191961B2 (en) * | 2002-11-29 | 2007-03-20 | Denso Corporation | Injection hole plate and fuel injection apparatus having the same |
US7438241B2 (en) * | 2004-11-05 | 2008-10-21 | Visteon Global Technologies, Inc. | Low pressure fuel injector nozzle |
-
2004
- 2004-10-09 DE DE102004049280A patent/DE102004049280A1/de not_active Withdrawn
-
2005
- 2005-09-20 WO PCT/EP2005/054698 patent/WO2006040246A1/de active Application Filing
- 2005-09-20 US US11/664,858 patent/US20090200402A1/en not_active Abandoned
- 2005-09-20 JP JP2007535135A patent/JP4646256B2/ja not_active Expired - Fee Related
- 2005-09-20 DE DE502005009285T patent/DE502005009285D1/de active Active
- 2005-09-20 EP EP05794491A patent/EP1799996B1/de active Active
- 2005-09-20 CN CN2005800341857A patent/CN101035980B/zh not_active Expired - Fee Related
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19607288A1 (de) * | 1995-03-29 | 1996-10-02 | Bosch Gmbh Robert | Verfahren zur Herstellung einer Lochscheibe |
US20040173693A1 (en) * | 2000-06-20 | 2004-09-09 | Ngk Insulators, Ltd. | Liquid droplet ejection apparatus and liquid droplet ejecting method |
DE10300313A1 (de) * | 2002-01-09 | 2003-07-24 | Visteon Global Tech Inc | Einspritzdüsenbaugruppe |
DE10303859A1 (de) * | 2002-01-31 | 2003-08-14 | Visteon Global Tech Inc | Düsenbaugruppe zur Einspritzung und Verwirbelung von Kraftstoff |
DE10343597A1 (de) * | 2002-09-25 | 2004-04-15 | Siemens Vdo Automotive Corporation, Auburn Hills | Sprühmustersteuerung mit Winkelausrichtung in einem Kraftstoffeinspritzventil und Verfahren |
WO2005064149A1 (de) * | 2003-12-23 | 2005-07-14 | Robert Bosch Gmbh | Brennstoffeinspritzventil |
Also Published As
Publication number | Publication date |
---|---|
DE502005009285D1 (de) | 2010-05-06 |
EP1799996B1 (de) | 2010-03-24 |
JP4646256B2 (ja) | 2011-03-09 |
DE102004049280A1 (de) | 2006-04-13 |
US20090200402A1 (en) | 2009-08-13 |
CN101035980A (zh) | 2007-09-12 |
CN101035980B (zh) | 2010-12-29 |
JP2008516136A (ja) | 2008-05-15 |
EP1799996A1 (de) | 2007-06-27 |
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