EP1332283A1 - Einspritznadel mit elastischer nadelspitze - Google Patents
Einspritznadel mit elastischer nadelspitzeInfo
- Publication number
- EP1332283A1 EP1332283A1 EP01992835A EP01992835A EP1332283A1 EP 1332283 A1 EP1332283 A1 EP 1332283A1 EP 01992835 A EP01992835 A EP 01992835A EP 01992835 A EP01992835 A EP 01992835A EP 1332283 A1 EP1332283 A1 EP 1332283A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- needle
- injection
- needle tip
- connecting piece
- injection needle
- 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
Links
- 238000002347 injection Methods 0.000 title claims abstract description 60
- 239000007924 injection Substances 0.000 title claims abstract description 60
- 238000007789 sealing Methods 0.000 claims abstract description 39
- 238000013016 damping Methods 0.000 claims abstract description 9
- 239000000463 material Substances 0.000 description 6
- 239000000446 fuel Substances 0.000 description 5
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
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
- F02M61/1873—Valve seats or member ends having circumferential grooves or ridges, e.g. toroidal
-
- 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
- F02M61/04—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00 having valves, e.g. having a plurality of valves in series
- F02M61/047—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00 having valves, e.g. having a plurality of valves in series the valves being formed by deformable nozzle parts, e.g. flexible plates or discs with fuel discharge orifices
-
- 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
- F02M61/04—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00 having valves, e.g. having a plurality of valves in series
- F02M61/10—Other injectors with elongated valve bodies, i.e. of needle-valve type
-
- 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
- F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
- F02M2200/30—Fuel-injection apparatus having mechanical parts, the movement of which is damped
-
- 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
- F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
- F02M2200/30—Fuel-injection apparatus having mechanical parts, the movement of which is damped
- F02M2200/306—Fuel-injection apparatus having mechanical parts, the movement of which is damped using mechanical means
Definitions
- the invention relates to an injection needle according to the preamble of claim 1 and an injection valve with such an injection needle.
- Injection needles have a wide variety of shapes, in particular in the area of the needle tip, with which the fuel flow is influenced. Furthermore, a sealing surface is formed on the needle tip, which is assigned to a sealing seat of a nozzle body.
- the sealing seat is at
- the object of the invention is to provide a simply constructed injection needle with which wear of the sealing seat is reduced.
- An essential advantage of the invention is that the needle tip is connected to the needle shaft via an elastic element.
- the elastic element dampens the impulse with which the injection needle hits the sealing seat with the needle tip, so that less stress is placed on the sealing seat.
- Further advantageous developments of the invention are specified in the dependent claims.
- a preferred embodiment of the elastic element consists in forming a center-symmetrically arranged connecting piece between the needle shaft and the needle tip.
- the needle tip, the connector and the needle shaft are integrally formed. In this way, a particularly simple embodiment of the invention is provided.
- the connecting piece is preferably designed in such a way that an annular circumferential groove is made in the injection needle, which defines the connecting piece.
- a preferred embodiment of the invention consists in forming the connecting piece with a diameter of 0.5 to 1.5 mm.
- the groove being at a distance from a sealing edge of the needle tip which is in the range from 0 to 1 mm.
- the groove has a U-shaped cross section.
- a U-shaped groove is easy to make so that the injection needle can be manufactured inexpensively.
- Fig. 2 shows a needle tip with a needle shaft
- Fig. 3 shows another embodiment of the injection needle.
- FIG. 1 shows an injection valve 1 which has a nozzle body 2.
- An injection needle 10 is movably guided in the nozzle body 2.
- the injection needle 10 has a needle tip 11 with a sealing surface 6.
- the sealing surface 6 lies in the closed state of the injection valve 1 with a sealing edge 22 on a sealing seat 5, which is formed above the injection holes 4 on the inner wall of the nozzle body 2.
- An injection space 3 is formed between the injection needle 10 and the nozzle body 2 and is connected to an inlet bore 8.
- the injection chamber 3 is supplied with fuel via the inlet bore 8.
- the inlet bore 8 is connected to a fuel reservoir, which holds fuel at a predetermined pressure.
- the actuator 7 is operatively connected to the injection needle 10 and determines the position of the injection needle 10 as a function of the control via the connections 9. If an injection is to take place, the actuator 7 is actuated in a corresponding manner and the injection needle 10 is lifted from the sealing seat 5 by the actuator 7. This creates a hydraulic connection between the injection chamber 3 and the injection holes 4. As a result, fuel is dispensed via the injection holes 4.
- the actuation of the actuator 7 is interrupted and the actuator 7 moves the injection needle 10 again with the sealing surface 6 onto the sealing seat 5, so that the hydraulic connection between the injection space 3 and the injection holes 4 is interrupted.
- the injection needle 10 is subdivided into a needle shaft 12 and a needle tip 11, the needle tip 11 being connected to the needle shaft 12 via a connecting piece 13.
- the needle tip 11 has a conical sealing surface 6, which is rotationally symmetrical to an axis of symmetry 14.
- a conical sealing seat 5 is assigned to the sealing surface 6, which is also rotationally symmetrical to the axis of symmetry 14 on the inner wall of the nozzle body 2.
- a difference angle A is formed between the sealing surface 6 and the sealing seat 5, so that a secure seal between the sealing seat 5 and the sealing surface 6 is ensured.
- the sealing surface 6 lies above the injection holes 4 with the sealing edge 22 on the sealing seat 5 in a circumferential ring surface.
- the needle shaft 12 merges from a first cylindrical section 15 into a second, conical section 16.
- the second section 16 is followed by a third section 17, which is also cylindrical, but has a smaller cross section than the first section 15.
- the third section 17 tapers again via a circumferential, annular groove 18 in a fourth section 19, which represents the connecting piece 13.
- the cross section then widens starting from the fourth section 19 in a fifth section 20.
- the fifth section 20 represents the upper part of the needle tip 11.
- the needle tip 11 tapers in the conical shape of the sealing surface 6 to an end surface 21, which closes the needle tip 11.
- the fifth section 20 and the third section 17 preferably have the same cross section.
- the groove 18 preferably has a U-shape in cross section. However, other shapes of grooves 18 are also possible.
- the connecting piece 13 is preferably arranged centrally symmetrically to the axis of symmetry 14 and preferably has a diameter D of 0.5 to 1.8 mm.
- a preferred size for the diameter of the connecting piece 13 is in the range from 1.1 to 1.3 mm.
- the width B of the groove 18 seen parallel to the axis of symmetry 14 preferably has a value of 0.1 to 1 mm. loading Particularly good properties were achieved with a groove width of 0.25 to 0.35 mm.
- the groove 18 has a lower edge 23 on which the needle tip 11 tapers to the connecting piece 13.
- the distance between the sealing edge 22 and the lower edge 23 is of particular importance since the distance essentially determines the elastic properties of the connection of the needle tip to the injection needle and thus the damping properties of the injection needle. Good damping properties are achieved with a distance Z of the lower edge 23 from the sealing edge 22 which is in the range from 0.1 to 1 mm.
- the lower edge 23 preferably runs after a rounding perpendicular to the longitudinal axis of the injection needle.
- An essential function of the groove 18 is to reduce the cross section of the connecting piece 13.
- the maximum yield stress which is exerted by the needle tip 11 on the nozzle body 2 can be reduced by up to 50%.
- Preferred values for a combination of the diameter D and the distance Z are for the diameter D from 1 to 1.3 mm and the distance Z from 0.1 to 1 mm.
- the injection needle 10 of FIG. 2 is formed in one piece from the needle shaft 12, the connecting piece 13 and the needle tip 11.
- the injection needle 10 is turned off Working steel S 652 or made of material 100 chrome 6.
- the invention is not limited to the one-piece embodiment, but the needle shaft 12, the connecting piece 13 and the needle tip 11 can also be made of different materials, the connecting piece 13 with the needle shaft 12 and the needle tip 11 via suitable connecting surfaces or connecting means connected is .
- the connecting piece 13 can be screwed into the needle shaft 12 and the needle tip 11 or welded to the needle shaft 12 and the needle tip 11.
- the connecting piece 13 is preferably produced from a material which has more damping properties than the material of the needle shaft 12 and / or the material of the needle tip 11.
- FIG. 3 shows a further embodiment of the injection needle, in which the lower edge 23 is guided up to a diameter D of the connecting piece 13.
- the lower edge 23 merges into a radius of curvature R which is in the range from 0.15 to 0.4 mm.
- a tangential truncated conical surface 24 adjoins the radius of curvature, which has an angle of 40 ° to 75 ° to the central axis of the injection needle.
- the diameter of the injection needle continues to increase up to the diameter of the needle shaft 12.
- the values for the distance Z and the diameter D are adjusted by a specialist together with the elastic properties of the material from which the injection needle is made.
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10054183 | 2000-11-02 | ||
DE10054183A DE10054183A1 (de) | 2000-11-02 | 2000-11-02 | Einspritznadel mit elastischer Nadelspitze |
PCT/DE2001/004102 WO2002036961A1 (de) | 2000-11-02 | 2001-10-30 | Einspritznadel mit elastischer nadelspitze |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1332283A1 true EP1332283A1 (de) | 2003-08-06 |
EP1332283B1 EP1332283B1 (de) | 2006-06-07 |
Family
ID=7661811
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP01992835A Expired - Lifetime EP1332283B1 (de) | 2000-11-02 | 2001-10-30 | Einspritznadel mit elastischer nadelspitze |
Country Status (4)
Country | Link |
---|---|
US (1) | US20030213459A1 (de) |
EP (1) | EP1332283B1 (de) |
DE (2) | DE10054183A1 (de) |
WO (1) | WO2002036961A1 (de) |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2004096316A2 (en) * | 2003-04-24 | 2004-11-11 | Medical Research Products-A, Inc. | Implantable medication delivery device having needle receiving slot |
EP1967730B1 (de) * | 2003-07-15 | 2009-12-23 | Delphi Technologies, Inc. | Einspritzdüse |
EP1522721B1 (de) | 2003-10-06 | 2006-05-03 | Delphi Technologies, Inc. | Einspritzdüse |
JP2005226580A (ja) * | 2004-02-13 | 2005-08-25 | Denso Corp | 燃料噴射装置 |
US7497850B2 (en) * | 2004-03-02 | 2009-03-03 | Infusion Systems, Llc | Medical device needle receiving port |
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 |
DE102016203028A1 (de) * | 2016-02-26 | 2017-08-31 | Bayerische Motoren Werke Aktiengesellschaft | Kraftstoffinjektor |
FR3057623B1 (fr) * | 2016-10-14 | 2020-12-25 | Delphi Int Operations Luxembourg Sarl | Membre de vanne d'un injecteur de carburant |
CN107143452B (zh) * | 2017-07-17 | 2024-03-08 | 辽阳新风科技有限公司 | 一种油嘴偶件、喷油器及汽车 |
JP2022088969A (ja) * | 2020-12-03 | 2022-06-15 | 株式会社ジャパンエンジンコーポレーション | 燃料噴射弁および舶用内燃機関 |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2711350A1 (de) * | 1977-03-16 | 1978-09-21 | Bosch Gmbh Robert | Kraftstoffeinspritzduese fuer brennkraftmaschinen |
JPS62162768A (ja) * | 1986-01-10 | 1987-07-18 | Nippon Denso Co Ltd | 燃料噴射弁 |
US5353992A (en) * | 1993-08-30 | 1994-10-11 | Chrysler Corporation | Multi-hole injector nozzle tip with low hydraulic plume penetration and large cloud-forming properties |
EP0641931A1 (de) * | 1993-09-06 | 1995-03-08 | Servojet Electronic Systems, Ltd. | Speicher-Kraffstoffeinspritzsystem |
US5636827A (en) * | 1994-09-20 | 1997-06-10 | Siemens Automotive Corporation | Notched needle bounce eliminator |
JP3213515B2 (ja) * | 1995-07-14 | 2001-10-02 | 三菱自動車工業株式会社 | 二段開弁圧式燃料噴射弁 |
GB9616851D0 (en) * | 1996-08-10 | 1996-09-25 | Lucas Ind Plc | Injector |
DE19855568A1 (de) * | 1998-12-02 | 2000-06-08 | Bosch Gmbh Robert | Brennstoffeinspritzventil |
-
2000
- 2000-11-02 DE DE10054183A patent/DE10054183A1/de not_active Ceased
-
2001
- 2001-10-30 WO PCT/DE2001/004102 patent/WO2002036961A1/de active IP Right Grant
- 2001-10-30 EP EP01992835A patent/EP1332283B1/de not_active Expired - Lifetime
- 2001-10-30 DE DE50110071T patent/DE50110071D1/de not_active Expired - Lifetime
-
2003
- 2003-05-02 US US10/428,359 patent/US20030213459A1/en not_active Abandoned
Non-Patent Citations (1)
Title |
---|
See references of WO0236961A1 * |
Also Published As
Publication number | Publication date |
---|---|
DE50110071D1 (de) | 2006-07-20 |
DE10054183A1 (de) | 2002-05-29 |
WO2002036961A1 (de) | 2002-05-10 |
US20030213459A1 (en) | 2003-11-20 |
EP1332283B1 (de) | 2006-06-07 |
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