EP0717816A1 - Ventilnadel für ein elektromagnetisch betätigbares ventil - Google Patents
Ventilnadel für ein elektromagnetisch betätigbares ventilInfo
- Publication number
- EP0717816A1 EP0717816A1 EP95919330A EP95919330A EP0717816A1 EP 0717816 A1 EP0717816 A1 EP 0717816A1 EP 95919330 A EP95919330 A EP 95919330A EP 95919330 A EP95919330 A EP 95919330A EP 0717816 A1 EP0717816 A1 EP 0717816A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- connecting part
- valve
- armature
- valve needle
- section
- 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
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
-
- 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
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S239/00—Fluid sprinkling, spraying, and diffusing
- Y10S239/90—Electromagnetically actuated fuel injector having ball and seat type valve
Definitions
- the invention relates to a valve needle for an electromagnetically actuated valve according to the preamble of the main claim.
- a valve needle for an electromagnetically actuated valve is already known, which consists of an armature, a valve closing member and the armature with the z.
- Connection tube exists.
- the individual sections represent separate parts manufactured separately from one another, which are only joined using joining processes, e.g. B. by laser welding.
- the armature encompasses the connecting tube completely radially and at least partially axially, since the connecting tube is fastened in a continuous longitudinal opening of the armature.
- the connecting tube itself also has a continuous inner longitudinal opening in which fuel can flow in the direction of the valve closing member, which then exits near the valve closing member through radially extending transverse openings made in the wall of the connecting tube. The fuel flow therefore takes place first inside the valve needle and only leaves the valve needle towards the valve seat.
- valve needle according to the invention with the characterizing features of the main claim has the advantage that it can be produced in a particularly simple and inexpensive manner. This is achieved according to the invention in that the “connecting tube” no longer has a sleeve shape, but rather can be produced as a connecting part between the armature and valve closing member from a simple and inexpensive semi-finished profile. This eliminates everyone
- the usable semi-finished products have a cross section such that flow channels are automatically formed in the longitudinal opening of the armature after the connection of the armature and the connecting part.
- the relatively large cross sections of these flow channels are advantageous, so that the fuel can flow freely through the flow channels in the axial direction and subsequently flows along the outer contour of the connecting part as far as the valve closing member.
- a particular advantage is the use of inexpensive rod material for the connecting part, which only has to be brought to an exact length for use on the valve needle.
- Semi-finished products for use as a connecting part of the valve needle which have a cross-shaped or Y-shaped cross section, are particularly advantageous.
- the connecting part used in the longitudinal opening of the armature accordingly also forms four or three Flow channels, since a flow channel is formed between two profile arms in the circumferential direction.
- FIG. 1 shows a fuel injector with a valve needle according to the invention
- FIG. 2 shows a side view of a valve needle according to a first embodiment
- FIG. 3 shows a top view of a valve needle according to a first embodiment
- FIG. 4 shows a side view of a valve needle according to a second embodiment
- 5 shows a top view of a valve needle according to a second embodiment
- FIG. 6 shows a top view of a valve needle according to a third embodiment
- FIG. 7 shows a top view of a valve needle according to a fourth embodiment
- FIG. 8 shows a top view of a valve needle according to a fifth embodiment
- 9 shows a plan view of a valve needle according to a sixth exemplary embodiment
- FIG. 10 shows a plan view of a valve needle according to a seventh exemplary embodiment.
- the electromagnetically actuated valve in the form of an injection valve for fuel injection systems of mixture-compressing spark-ignition internal combustion engines, for example, shown in FIG. 1 a tubular core 2 surrounded by a magnetic coil 1 and serving as a fuel inlet connector.
- the magnetic coil 1 with a coil body 3 is, for. B. with a plastic extrusion 5, at the same time an electrical connector 6 is molded.
- a tubular, metallic intermediate part 12 is connected, for example by welding, concentrically to a longitudinal valve axis 11 and partially overlaps the core end 10 axially.
- the intermediate part 12 is provided at its end facing away from the core 2 with a lower cylinder section 18 which engages over a tubular nozzle carrier 19 and is tightly connected thereto, for example by welding.
- a cylindrical valve seat body 21 is tightly mounted by welding in a through hole 20 which runs concentrically to the valve longitudinal axis 11.
- the valve seat body 21 has the solenoid 1 facing a fixed valve seat 22, downstream of which in the valve seat body 21 z. B. two spray openings 23 are formed. Downstream of the spray openings 23, the valve seat body 21 has a treatment bore 24 which widens in the shape of a truncated cone in the direction of the flow.
- a tubular adjusting bushing 27 is pressed into a stepped flow bore 25 of the core 2 that runs concentrically to the valve longitudinal axis 11 in order to adjust the spring force of a return spring 26.
- the press-in depth of the adjusting bush 27 into the flow bore 25 of the core 2 determines the spring force of the return spring 26 and thus also influences the dynamic fuel quantity emitted during the opening and closing stroke of the valve.
- the return spring 26 With its end facing away from the adjusting bush 27, the return spring 26 is supported on a core 2 facing End face 30 of a connecting part 32 arranged concentrically to the longitudinal valve axis 11 and designed according to the invention.
- the connecting part 32 made from a semi-finished product is part of a valve needle 34, to which a core 2 facing and cooperating with the core 2 and the magnetic coil 1 also has a sleeve-shaped armature 36 and an end 38 located at the downstream end 38 of the connecting part 32, e.g. B. include spherical valve closing member 37.
- the spherical valve closing member 37 is fixedly connected to the connecting part 32, for example, by means of welded joints 40 achieved by laser welding.
- the connecting part 32 has at its downstream end 38 of the end face 30 a front, for. B. partially dome-shaped contact surface 41.
- the connecting part 32 and the valve closing member 37 have a smaller diameter than the armature 36.
- the spherical valve closing member 37 for example, has on its circumference z. B. four circular flats 50, which facilitate the flow of fuel in the direction of the valve seat 22 of the valve seat body 21.
- the armature 36 is connected to the end of the connecting part 32 which is inserted into it, facing away from the valve closing member 37, by means of a plurality of small weld seams 48 and is aligned with the core 2.
- the magnetic coil 1 is at least partially surrounded by at least one guiding element 51, for example in the form of a bracket, which serves as a ferromagnetic element and which bears with its one end on the core 2 and with its other end on the nozzle carrier 19 and with this, for. B. is connected by welding or soldering.
- a plastic sheathing 52 which extends from the core 2 in the axial direction via the magnetic coil 1 with connector 6 and the at least one guide element 51.
- FIG. 2 shows a side view of a valve needle 34 with a cut-open armature 36 according to a first exemplary embodiment
- FIG. 3 shows a top view of this valve needle 34.
- the connecting part 32 made from a cross-shaped semi-finished product has four radially outwardly extending narrow profile arms 54, each offset by 90 °, which are connected to one another via a central region 55. This means that two profile arms 54 are exactly opposite each other and form a cross in cross section.
- the profile arms 54 extend in
- the flow channels 60 Due to the shape of the connecting part 32, the flow channels 60 have an approximately triangular cross section and are exactly as long as the length of the wrap around the armature 36 around the connecting part 32.
- the fuel arrives from the flow bore 25 in the core 2 as far as the armature 36 and enters its inner longitudinal opening up to the end face 30 of the connecting part 32. This is where the four flow channels 60 begin, over which the fuel is divided and through which it is passed.
- the fuel emerges again from the flow channels 60 and flows at least partially as a wall film of the connecting part 32 to the valve closing member 37. Without longitudinal slots or transverse openings in the connecting part 32, the fuel flow to the valve seat 22 is therefore still completely guaranteed.
- the welded connections 40 between the connecting part 32 and the valve closing member 37 are made, for example, analogously to the weld seams 48, only in the outer edge region of the profile arms 54.
- FIGS. 4 and 5 show a second exemplary embodiment of a valve needle 34 according to the invention in a side view and a top view. The are compared to that shown in Figures 1 to 3
- Embodiment constant or equivalent parts identified by the same reference numerals.
- the valve needle 34 is now characterized by a connecting part 32 with a Y-shaped cross section.
- the connecting part 32 thus has only three narrow profile arms 54 which extend radially outwards, for example each offset by 120 °, and which are connected to one another via a central region 55.
- the three profile arms 54 also extend in the longitudinal direction over the entire length of the connecting part 32.
- the weld seams 40 and 48 are also analogous to the first
- the three profile arms 54 inevitably have the result that three flow channels 60 are also formed in the axial extension region of the armature 36 and the fuel flows axially through them.
- the connecting part 32 represents a very cost-effective variant, since a semi-finished profile product can be used, through which flow channels 60 are already created, without additional fuel outlet openings having to be provided in various processing steps.
- the use of rod material is a particular advantage for the connecting part 32, which only has to be brought to an exact length for use on the valve needle 34.
- valve needles 34 are shown as top views in FIGS. 6 to 10.
- the third exemplary embodiment shown in FIG. 6 is a valve needle 34 with a plate-shaped connecting part 32 which has two flat and two rounded peripheral surfaces
- End faces 56 serve for better fastening of the connecting part 32 in the armature 36 having a circular inner wall.
- the flat peripheral surfaces extend at a radial distance from the inner wall of the armature 36, so that between the two flat peripheral surfaces and the inner wall the armature 36 two flow channels 60 are formed for the fuel.
- the fourth exemplary embodiment shown in FIG. 7 illustrates a further variant of the design of the connecting part 32 from a semi-finished product.
- the connecting part 32 now has a circular cross-section, for example exactly a semicircular cross-section.
- the rounded end surface 56 touches the armature 36 on its inner wall and is firmly connected to it.
- the part of the connecting part 32 which has a circular cross-section in cross section and which is missing in relation to a full circle represents precisely the flow channel 60 in the interior of the armature 36.
- This flow channel 60 which is formed on one side, is particularly advantageous when asymmetrical beam paths are to be achieved.
- valve needles 34 with connecting parts 32 which have no rounded end faces 56 as semi-finished products, are shown in FIGS. 9 and 10.
- the connecting parts 32 which have a triangular or quadrangular cross section, have only three or four axial line contacts with the inner wall of the armature 36, so that only very narrow areas for fastening between the armature 36 and the connecting part 32 are available. According to the number of corners of the
- Connecting part 32 also results in the flow channels 60 for the fuel, that is to say four flow channels 60 in the case of a square connecting part 32.
- the flow channels 60 are formed on the one hand by the circular inner wall of the armature 36 and on the other hand by the flat peripheral surfaces of the connecting part running between two corners 32 limited. With these connecting parts 32, it is possible to create flow channels 60 of the same size or of different sizes.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Manufacturing & Machinery (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4420176A DE4420176A1 (de) | 1994-06-09 | 1994-06-09 | Ventilnadel für ein elektromagnetisch betätigbares Ventil |
DE4420176 | 1994-06-09 | ||
PCT/DE1995/000692 WO1995033923A1 (de) | 1994-06-09 | 1995-05-26 | Ventilnadel für ein elektromagnetisch betätigbares ventil |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0717816A1 true EP0717816A1 (de) | 1996-06-26 |
EP0717816B1 EP0717816B1 (de) | 1999-09-08 |
Family
ID=6520180
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP95919330A Expired - Lifetime EP0717816B1 (de) | 1994-06-09 | 1995-05-26 | Elektromagnetisch betätigbares ventil |
Country Status (11)
Country | Link |
---|---|
US (1) | US5820031A (de) |
EP (1) | EP0717816B1 (de) |
JP (1) | JPH09501480A (de) |
KR (1) | KR100378456B1 (de) |
CN (1) | CN1064741C (de) |
BR (1) | BR9506256A (de) |
CZ (1) | CZ286185B6 (de) |
DE (2) | DE4420176A1 (de) |
ES (1) | ES2138204T3 (de) |
RU (1) | RU2138722C1 (de) |
WO (1) | WO1995033923A1 (de) |
Families Citing this family (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19627939C1 (de) * | 1996-07-11 | 1997-03-20 | Bosch Gmbh Robert | Ventilnadel und Verfahren zur Herstellung einer Ventilnadel |
DE19632196B4 (de) * | 1996-08-09 | 2004-11-04 | Robert Bosch Gmbh | Elektromagnetisch betätigbares Ventil |
DE19712590A1 (de) * | 1997-03-26 | 1998-10-01 | Bosch Gmbh Robert | Elektromagnetisch betätigbares Ventil |
US6199776B1 (en) * | 1997-11-22 | 2001-03-13 | Robert Bosch Gmbh | Fuel injection valve and method for the production of a valve needle for a fuel injection valve |
US6299079B1 (en) * | 1998-06-18 | 2001-10-09 | Robert Bosch Gmbh | Fuel injector |
DE19833461A1 (de) * | 1998-07-24 | 2000-01-27 | Bosch Gmbh Robert | Elektromagnetisch betätigbares Ventil |
US6422486B1 (en) | 2000-03-31 | 2002-07-23 | Siemens Automotive Corporation | Armature/needle assembly for a fuel injector and method of manufacturing same |
US6409101B1 (en) | 2000-06-30 | 2002-06-25 | Siemens Automotive Corporation | Hollow oversized telescopic needle with armature |
JP3799599B2 (ja) * | 2001-02-26 | 2006-07-19 | 株式会社デンソー | 溶接装置および溶接方法 |
DE10153019A1 (de) * | 2001-10-26 | 2003-05-08 | Ina Schaeffler Kg | Elektromagnet, insbesondere Proportionalmagnet zur Betätigung eines hydraulischen Ventils |
DE10156021A1 (de) * | 2001-11-15 | 2003-06-26 | Bosch Gmbh Robert | Brennstoffeinspritzanlage |
JP2006233887A (ja) * | 2005-02-25 | 2006-09-07 | Denso Corp | 燃料噴射弁 |
FR2891318A3 (fr) * | 2005-09-26 | 2007-03-30 | Renault Sas | Injecteur de gazole pour moteur a combustion interne |
CN101949344B (zh) * | 2010-09-10 | 2012-07-04 | 浙江冯仕特电喷技术有限公司 | 一种燃油电磁喷射阀 |
EP2803850A1 (de) * | 2013-05-16 | 2014-11-19 | Continental Automotive GmbH | Ventilnadel für ein Flüssigkeitseinspritzelement, Ventilnadelanordnung, Ventilanordnung und Kraftstoffeinspritzelement |
GB2519171B (en) * | 2013-10-14 | 2016-02-17 | Redd & Whyte Ltd | Micro-Valve |
DE102015221790A1 (de) | 2015-11-06 | 2017-05-11 | Robert Bosch Gmbh | Elektromagnetisch betätigbares Ventil und Verfahren zur Herstellung einer Ventilnadel für ein elektromagnetisch betätigbares Ventil |
DE102016225939A1 (de) | 2016-12-22 | 2018-06-28 | Robert Bosch Gmbh | Elektromagnetisch betätigbares Ventil und Verfahren zur Herstellung einer Ventilnadel für ein elektromagnetisch betätigbares Ventil |
CN112709828B (zh) * | 2021-01-06 | 2022-08-30 | 中国石油天然气股份有限公司 | 一种针型阀及其使用方法 |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2957631A (en) * | 1957-03-14 | 1960-10-25 | Acf Ind Inc | Nozzle for fuel injector system |
DE2458728A1 (de) * | 1974-12-12 | 1976-06-24 | Bosch Gmbh Robert | Elektromagnetisch betaetigbares einspritzventil |
DE3831196A1 (de) * | 1988-09-14 | 1990-03-22 | Bosch Gmbh Robert | Elektromagnetisch betaetigbares ventil |
DE3914486A1 (de) * | 1989-05-02 | 1990-11-08 | Bosch Gmbh Robert | Verfahren zur herstellung einer ventilnadel und ventilnadel |
DE4008675A1 (de) * | 1990-03-17 | 1991-09-19 | Bosch Gmbh Robert | Elektromagnetisch betaetigbares ventil |
JPH04136476A (ja) * | 1990-09-28 | 1992-05-11 | Nippon Injiekuta Kk | 燃料噴射弁 |
US5307991A (en) * | 1990-10-09 | 1994-05-03 | Ford Motor Company | Fuel injector and method of manufacturing |
DE4128821A1 (de) * | 1991-08-30 | 1993-03-04 | Bosch Gmbh Robert | Elektromagnetisch betaetigbares einspritzventil |
DE4230376C1 (de) * | 1992-09-11 | 1993-04-22 | Robert Bosch Gmbh, 7000 Stuttgart, De | |
DE4415850A1 (de) * | 1994-05-05 | 1995-11-09 | Bosch Gmbh Robert | Ventilnadel für ein elektromagnetisch betätigbares Ventil |
-
1994
- 1994-06-09 DE DE4420176A patent/DE4420176A1/de not_active Withdrawn
-
1995
- 1995-05-26 BR BR9506256A patent/BR9506256A/pt not_active IP Right Cessation
- 1995-05-26 ES ES95919330T patent/ES2138204T3/es not_active Expired - Lifetime
- 1995-05-26 DE DE59506783T patent/DE59506783D1/de not_active Expired - Lifetime
- 1995-05-26 JP JP8500161A patent/JPH09501480A/ja active Pending
- 1995-05-26 WO PCT/DE1995/000692 patent/WO1995033923A1/de active IP Right Grant
- 1995-05-26 KR KR1019960700581A patent/KR100378456B1/ko not_active IP Right Cessation
- 1995-05-26 CZ CZ1996372A patent/CZ286185B6/cs not_active IP Right Cessation
- 1995-05-26 EP EP95919330A patent/EP0717816B1/de not_active Expired - Lifetime
- 1995-05-26 US US08/591,620 patent/US5820031A/en not_active Expired - Fee Related
- 1995-05-26 RU RU96106893A patent/RU2138722C1/ru not_active IP Right Cessation
- 1995-05-26 CN CN95190528A patent/CN1064741C/zh not_active Expired - Fee Related
Non-Patent Citations (1)
Title |
---|
See references of WO9533923A1 * |
Also Published As
Publication number | Publication date |
---|---|
WO1995033923A1 (de) | 1995-12-14 |
CN1064741C (zh) | 2001-04-18 |
KR960704153A (ko) | 1996-08-31 |
BR9506256A (pt) | 1997-08-12 |
KR100378456B1 (ko) | 2003-06-02 |
DE4420176A1 (de) | 1995-12-14 |
CZ37296A3 (en) | 1996-07-17 |
JPH09501480A (ja) | 1997-02-10 |
EP0717816B1 (de) | 1999-09-08 |
RU2138722C1 (ru) | 1999-09-27 |
CZ286185B6 (cs) | 2000-02-16 |
DE59506783D1 (de) | 1999-10-14 |
ES2138204T3 (es) | 2000-01-01 |
CN1129472A (zh) | 1996-08-21 |
US5820031A (en) | 1998-10-13 |
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