WO2019137679A1 - Ventil zum zumessen eines fluids, insbesondere brennstoffeinspritzventil - Google Patents
Ventil zum zumessen eines fluids, insbesondere brennstoffeinspritzventil Download PDFInfo
- Publication number
- WO2019137679A1 WO2019137679A1 PCT/EP2018/082310 EP2018082310W WO2019137679A1 WO 2019137679 A1 WO2019137679 A1 WO 2019137679A1 EP 2018082310 W EP2018082310 W EP 2018082310W WO 2019137679 A1 WO2019137679 A1 WO 2019137679A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- valve
- closing body
- fuel injection
- needle shaft
- valve needle
- 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
- F02M61/168—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
-
- 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
- F02M61/16—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
- F02M61/188—Spherical or partly spherical shaped valve member ends
-
- 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
- F02M2200/80—Fuel injection apparatus manufacture, repair or assembly
- F02M2200/8084—Fuel injection apparatus manufacture, repair or assembly involving welding or soldering
-
- 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
- F02M2200/90—Selection of particular materials
- F02M2200/9038—Coatings
Definitions
- Valve for metering a fluid in particular fuel injection valve
- the invention is based on a valve for metering a fluid
- a known valve in the form of a fuel injection valve is shown.
- a valve is known for example from DE 10 2010 038 437 Al.
- the fuel injection valve is particularly suitable for the direct injection of fuel into a combustion chamber of internal combustion engines.
- the valve has an electromagnet as an excitable actuator for actuating a
- Valve-closing body which forms a sealing seat together with a formed on a valve seat body valve seat surface, and at least one
- valve closing body is spherical and as part of a longitudinally movable along a valve longitudinal axis valve needle with a pin-shaped solid
- Valve pin shaft firmly connected to its ball pole.
- Characteristic features of claim 1 is characterized by a simple and inexpensive manufacturability. According to the invention, there is a contact area a pin-shaped solid valve pin shaft and a spherical
- Valve-closing body of a valve needle radially outside the valve longitudinal axis and runs around a ring.
- the spherical valve closing body touches the
- Valve needle shaft no longer with his ball pole, but at a radially outer lying Bernton Vietnamese.
- the spherical valve closing body is centered with respect to the valve needle shaft.
- the rotation of the valve needle shaft during the welding process at corresponding
- Valve seat Overall, a simplified system technology for the preparation of the solid compound can be used; In addition, a very stable welding process is guaranteed in which the tendency to weld spatter is minimized, the crack tendency is reduced and an axial position sensitivity is eliminated.
- Design variants according to the invention enable welding by means of a
- the spherical valve closing body is provided with a coating on its lower side remote from the valve needle shaft.
- the coating is ideally carried out with an amorphous carbon layer, such as DLC (diamond-like carbon). drawing
- FIG. 1 shows a schematic section through a fuel injection valve in a known embodiment with a valve pin on a valve needle attached to a spherical valve closing body
- FIG. 2 is an enlarged schematic representation of a valve needle end as a detail II - V of FIG. 1 according to the prior art
- FIG. 3 shows a first embodiment according to the invention of a valve needle in a detail view comparable to FIG. 2,
- FIG. 4 shows a second embodiment according to the invention a valve needle in a comparable with FIG. 2 cutout and
- Fig. 5 shows a third embodiment of a valve needle according to the invention in a comparable with FIG. 2 cutout view.
- a known example of a fuel injection valve 1 shown in FIG. 1 is in the form of a fuel injection valve 1 for fuel injection systems of mixture-compression spark-ignition internal combustion engines.
- the fuel injection valve 1 is suitable in particular for the direct injection of fuel into a combustion chamber, not shown, of an internal combustion engine.
- the invention is applicable to valves for metering a fluid.
- the fuel injection valve 1 consists of a nozzle body 2 in which a valve needle 3, which is axially movable along a valve longitudinal axis 40, is arranged.
- the valve needle 3 is connected to a spherical valve closing body 4 in
- Valve seat surface 6 cooperates to a sealing seat.
- Nozzle body 2 can also be made in one piece.
- Fuel injection valve 1 is in the exemplary embodiment to an inwardly opening fuel injection valve 1, which via at least one
- the fuel injection valve 1 is ideally designed as a multi-hole injection valve and therefore has between four and thirty
- the nozzle body 2 is sealed by a seal 8 against a valve housing 9.
- the drive is e.g. an electromagnetic circuit comprising a solenoid coil 10 as an actuator, which is encapsulated in a coil housing 11 and wound on a bobbin 12, which rests against an inner pole 13 of the magnetic coil 10.
- the inner pole 13 and the valve housing 9 are separated by a constriction 26 and connected to each other by a non-ferromagnetic connecting member 29.
- the magnetic coil 10 is energized via a line 19 from a via an electrical plug contact 17 can be supplied with electric current.
- the plug contact 17 is surrounded by a plastic casing 18, which may be molded on the inner pole 13. Alternatively, piezoelectric or magnetostrictive actuators can be used.
- valve needle 3 is guided in a valve needle guide 14 which is e.g.
- the stroke setting is a paired
- Shim 15 On the other side of the shim 15 is an anchor 20. This is about a first flange 21 frictionally with the anchor 20.
- Valve needle 3 in conjunction, which is connected by a weld 22 to the first flange 21.
- a return spring 23 is supported, which is brought in the present design of the fuel injection valve 1 by an adjusting sleeve 24 to bias.
- valve needle guide 14 in the armature 20 and on a guide body 41 extend fuel channels 30, 31 and 32.
- the fuel is supplied via a central fuel supply 16 and filtered by a filter element 25.
- Fuel injection valve 1 is sealed by a seal 28 against a fuel distributor line, not shown, and by a further seal 36 against a cylinder head, not shown.
- an annular damping element 33 which consists of an elastomer material, arranged. It rests on a second flange 34 which is non-positively connected to the valve needle 3 via a weld seam 35.
- Valve-closing body 4 is held on the valve seat surface 6 in sealing engagement.
- the armature 20 drops after sufficient degradation of the magnetic field by the pressure of the return spring 23 from the inner pole 13, whereby the valve connected to the needle 3 in communication first flange 21 moves against the stroke direction.
- the valve needle 3 is thereby moved in the same direction, whereby the valve closing body 4 touches on the valve seat surface 6 and the fuel injection valve 1 is closed.
- FIG. 2 shows an enlarged schematic representation of a valve seat surface 6 facing valve needle end as a section II - V of FIG. 1 according to the prior art.
- the pin-shaped massive valve needle shaft 45 is placed centrally in the region of the valve longitudinal axis 40 on the spherical valve closing body 4.
- valve needle shaft 45 and valve closing body 4 Connection of valve needle shaft 45 and valve closing body 4 is the
- Valve closing body 4 only to the flat end of the valve needle shaft 45th pressed down, while subsequently by means of laser welding a circumferential deep weld or more distributed over the circumference welds around the central contact area around are generated.
- valve needle shaft 45 and valve closing body 4 In order to achieve good concentricity of the valve needle 3 and an exact alignment of valve needle shaft 45 and valve closing body 4 to each other, the production of the fixed connection between the two components is relatively complex. Either the two components 4, 45 must be separately driven during welding, with an exact alignment of the rotational speeds of the valve needle shaft 45 and valve closing body 4 is required to avoid cracks during welding and subsequent cooling. Or alternatively, the laser optics must be moved during the welding process to the stationary components valve needle shaft 45 and valve closing body 4, which means a particularly high and costly effort for the welding system.
- the object of the invention is therefore to simplify one in the production
- valve needle 3 for a valve which has a safe and reliable durable connection area with a weld seam without seam incidence and thereby meets all the requirements for concentricity and component alignment.
- the object is achieved in that a contact area of pin-shaped massive valve needle shaft 45 and spherical valve closing body 4 is located radially outside the valve longitudinal axis 40 and annularly rotates.
- FIG. 3 shows a first exemplary embodiment of a valve needle 3 according to the invention in a detail representation comparable to FIG.
- the valve closing body 4 facing the lower end of the
- Ventilnadelschafts 45 starting from the lower end face on a blind hole 50, which serves as a center hole.
- the blind hole 50 runs to
- Valve-closing body 4 out in a truncated cone region 51, to the spherical valve closing body 4 is applied for improved ball centering.
- the contact of the valve closing member 4 on the valve needle shaft 45 is thus at the truncated cone portion 51 largely linear and annular before.
- Figure 4 shows a second inventive embodiment of a valve needle 3 in a comparable with Figure 2 cutout view.
- the valve closing body 4 facing the lower end of the
- Valve needle shaft 45 starting from the lower end face on a recess in the form of a Kugelkalotten Schemes 52, which also serves as a centering. At the Kugelkalotten Scheme 52 of the spherical valve closing body 4 is applied for improved ball centering.
- Kugelkalotten Schemes 52 is slightly smaller than the diameter of the spherical valve closing body 4, to ensure that the contact of the valve closing body 4 is always present at the outer edge Kugelkalotten Schemes 52 of the valve needle shaft 45.
- FIG. 5 shows a third exemplary embodiment of a valve needle 3 according to the invention in a detail representation comparable to FIG. In this embodiment, the valve closing body 4 facing the lower end of the
- Valve needle shaft 45 starting from the lower end face on a cone portion 53 which serves to center the valve closing body 4. To the cone portion 53 of the spherical valve closing body 4 is applied for improved ball centering. The contact of the valve closing body 4 on the valve needle shaft 45 is thus at the cone portion 53 largely linear and annular before.
- the spherical valve closing body 4 on its valve needle shaft 45 facing away from the lower side with a
- Coating e.g. a DLC coating (diamond-like carbon) be provided.
- FIGS. 3 to 5 The illustration of the connecting regions of the valve needle 3 in FIGS. 3 to 5 is only schematic and not exact to scale.
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)
- Lift Valve (AREA)
- Magnetically Actuated Valves (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US16/769,030 US20210222657A1 (en) | 2018-01-11 | 2018-11-23 | Valve for metering a fluid, in particular a fuel injector |
CN201880086083.7A CN111566336A (zh) | 2018-01-11 | 2018-11-23 | 用于配量流体的阀、尤其是燃料喷射阀 |
JP2020538642A JP2021510191A (ja) | 2018-01-11 | 2018-11-23 | 流体を定量供給するためのバルブ、特に燃料噴射バルブ |
KR1020207019891A KR20200103717A (ko) | 2018-01-11 | 2018-11-23 | 유체 계량 밸브, 특히 연료 분사 밸브 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102018200357.2A DE102018200357A1 (de) | 2018-01-11 | 2018-01-11 | Ventil zum Zumessen eines Fluids, insbesondere Brennstoffeinspritzventil |
DE102018200357.2 | 2018-01-11 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2019137679A1 true WO2019137679A1 (de) | 2019-07-18 |
Family
ID=64477155
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2018/082310 WO2019137679A1 (de) | 2018-01-11 | 2018-11-23 | Ventil zum zumessen eines fluids, insbesondere brennstoffeinspritzventil |
Country Status (6)
Country | Link |
---|---|
US (1) | US20210222657A1 (de) |
JP (1) | JP2021510191A (de) |
KR (1) | KR20200103717A (de) |
CN (1) | CN111566336A (de) |
DE (1) | DE102018200357A1 (de) |
WO (1) | WO2019137679A1 (de) |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0685643A2 (de) * | 1994-05-05 | 1995-12-06 | Robert Bosch Gmbh | Ventilnadel für ein elektromagnetisch betätigbares Ventil |
DE102010038437A1 (de) | 2010-07-27 | 2012-02-02 | Robert Bosch Gmbh | Magnetaktor |
DE102011078732A1 (de) * | 2011-07-06 | 2013-01-10 | Robert Bosch Gmbh | Vorrichtung zur Einspritzung von Kraftstoff |
US8893989B2 (en) * | 2006-11-09 | 2014-11-25 | Robert Bosch Gmbh | Fuel injector |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6935578B1 (en) * | 1998-11-25 | 2005-08-30 | Hitachi, Ltd. | Fuel injection valve |
US6508416B1 (en) * | 2000-04-28 | 2003-01-21 | Delphi Technologies, Inc. | Coated fuel injector valve |
DE102005061424A1 (de) * | 2005-12-22 | 2007-07-05 | Robert Bosch Gmbh | Brennstoffeinspritzventil |
JP5363228B2 (ja) * | 2009-07-27 | 2013-12-11 | 株式会社ケーヒン | 電磁式燃料噴射弁 |
-
2018
- 2018-01-11 DE DE102018200357.2A patent/DE102018200357A1/de active Pending
- 2018-11-23 WO PCT/EP2018/082310 patent/WO2019137679A1/de active Application Filing
- 2018-11-23 US US16/769,030 patent/US20210222657A1/en not_active Abandoned
- 2018-11-23 CN CN201880086083.7A patent/CN111566336A/zh active Pending
- 2018-11-23 JP JP2020538642A patent/JP2021510191A/ja active Pending
- 2018-11-23 KR KR1020207019891A patent/KR20200103717A/ko not_active Application Discontinuation
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0685643A2 (de) * | 1994-05-05 | 1995-12-06 | Robert Bosch Gmbh | Ventilnadel für ein elektromagnetisch betätigbares Ventil |
US8893989B2 (en) * | 2006-11-09 | 2014-11-25 | Robert Bosch Gmbh | Fuel injector |
DE102010038437A1 (de) | 2010-07-27 | 2012-02-02 | Robert Bosch Gmbh | Magnetaktor |
DE102011078732A1 (de) * | 2011-07-06 | 2013-01-10 | Robert Bosch Gmbh | Vorrichtung zur Einspritzung von Kraftstoff |
Also Published As
Publication number | Publication date |
---|---|
CN111566336A (zh) | 2020-08-21 |
JP2021510191A (ja) | 2021-04-15 |
KR20200103717A (ko) | 2020-09-02 |
DE102018200357A1 (de) | 2019-07-11 |
US20210222657A1 (en) | 2021-07-22 |
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