WO2002044547A2 - Brennstoffeinspritzventil und verfahren zu dessen herstellung - Google Patents
Brennstoffeinspritzventil und verfahren zu dessen herstellung Download PDFInfo
- Publication number
- WO2002044547A2 WO2002044547A2 PCT/DE2001/004463 DE0104463W WO0244547A2 WO 2002044547 A2 WO2002044547 A2 WO 2002044547A2 DE 0104463 W DE0104463 W DE 0104463W WO 0244547 A2 WO0244547 A2 WO 0244547A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- valve seat
- seat body
- valve
- fuel injection
- nozzle body
- 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
- F02M61/162—Means to impart a whirling motion to fuel upstream or near discharging 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
- F02M61/16—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
- F02M61/1806—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for characterised by the arrangement of discharge orifices, e.g. orientation or size
-
- 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 fuel injector according to the preamble of claim 1 and a method according to the
- Fuel injectors which have a valve seat body which is inserted at the downstream end of the fuel injector into a nozzle body of the fuel injector from the downstream side are e.g. known from DE 197 36 682 AI. They have a valve seat surface in the valve seat body, which cooperates with a valve closing body to form a sealing seat. A welded connection serves as fixation.
- a swirl-forming assembly is arranged upstream of the valve seat body and is positioned by means of a spring on the upstream side of the valve seat body.
- the swirl-forming assembly consists of a guide disk and a swirl disk, which is arranged between the guide disk and the valve seat body.
- valve seat body and the nozzle body must be sealing on the one hand, on the other hand it must be the force exerted by the fuel pressure and the spring force with which the valve closing body is pressed onto the valve seat surface, resist.
- the valve seat body is pressed into the nozzle body and then welded. Due to the press connection, which forms the basis for a reproducible high-quality welding process, it is not possible to correct the position of the components relative to one another. However, the quality of the sealing seat depends on the relative position of the central axes. The parts are therefore subjected to extensive turning in order to ensure the required precision.
- a fuel injector in which the preparation of the fuel to be sprayed and the sealing seat are arranged together in a valve seat body.
- the valve seat body has a recess for guiding the valve needle. Upstream of the valve seat surface, fuel channels are introduced into the valve seat body, through which the fuel is injected in single jets through a large opening.
- the valve seat body itself is in turn machined and is pressed into the nozzle body from the downstream direction and then welded.
- a disadvantage of the known fuel injection valves is the lack of the possibility of compensating for existing component tolerances by positioning the valve seat body.
- the position of the guide bore to the valve seat is of great importance.
- the gap size is kept as small as possible.
- tolerances can only be compensated for with this gap dimension.
- An increase in the gap dimension may allow vibrations of the valve needle, which are not desired.
- a gap that is too small leads to mechanical wear on the valve needle, which grinds against the guide bore each time the fuel injector is opened and closed.
- the fuel injector according to the invention according to the preamble of claim 1 has the advantage that the position of the valve seat is variable.
- a precise alignment takes place.
- the valve seat body is held in this position and then welded.
- valve seat body is inserting from the inside.
- the forces acting on the valve seat body are absorbed by the nozzle body.
- the weld seam is not mechanically stressed.
- the process control is considerably simplified, as is the control of the connection point. A leak test of the fuel injector is possible by simply pressing it down.
- welding the swirl disk to the valve seat body advantageously reduces the position tolerance.
- the position can be precisely determined using a centering pin.
- the swirl and guide disk can be handled together with the valve seat body as one assembly.
- pre-assembly which means that any rejects of the valve seat assembly that may be incurred cannot only be detected on the production line of the fuel injector.
- the use of a ball as a valve seat body is advantageous.
- the swirl-processing recesses are introduced into the ball.
- the use of e.g. Ball bearings reduce costs because they are inexpensive and available in large quantities and consistent quality.
- the handling of the balls, which do not have to be fed to the machining in an oriented manner, is simple.
- Fuel injection valves are shown in simplified form in the drawings and are explained in more detail in the description below. Show it:
- Figure 1 is a schematic partial section through an embodiment of a fuel injector according to the invention.
- Fig. 2 shows a schematic partial section in section II of Fig. 1 by a first embodiment of an inventive
- FIG. 3 is a schematic partial section in section II of Fig. 1 by a second embodiment of an inventive
- Fig. 4 is a schematic partial section in section II of Fig. 1 by a third embodiment of an inventive
- FIG. 5 shows a section through the third exemplary embodiment along the line V-V of FIG. 4.
- the fuel injector 1 is in the form of a fuel injector 1 for fuel injection systems of mixture-compressing, spark-ignited
- Fuel injection valve 1 is particularly suitable for injecting fuel directly into a combustion chamber (not shown) of an internal combustion engine.
- the fuel injection valve 1 comprises a nozzle body 2, in which a valve needle 3 is arranged.
- the valve needle 3 is operatively connected to a valve closing body 4, which cooperates with a valve seat surface 6 arranged on a valve seat body 5 to form a sealing seat.
- fuel injector 1 is an electromagnetically actuated fuel injector 1, which at least has a spray orifices 7.
- the nozzle body 2 is sealed by a seal 8 against the outer pole of a solenoid 10.
- the magnet coil 10 is encapsulated in a coil housing 11 and wound on a coil carrier 12, which bears against an inner pole 13 of the magnet coil 10.
- the inner pole 13 and the outer pole 9 are separated from one another by a gap 26 and are supported on a connecting component 29.
- the magnet coil 10 is excited via a line 19 by an electrical current that can be supplied via an electrical plug contact 17.
- the plug contact 17 is surrounded by a plastic sheath 18, which can be molded onto the inner pole 13.
- valve needle 3 is guided in a disk-shaped valve needle guide 14. This is one
- Valve needle stroke serves. On the upstream side of the
- Adjustment disc 15 is an anchor 20. This is non-positively connected to the valve needle 3 via a flange 21, which is connected to the valve needle by a weld 22
- Flange 21 is connected. On the flange 21, a return spring 23 is supported, which in the present
- Inner pole 13 pressed sleeve 24 is brought to bias.
- Fuel channels 30a, 30b run in the valve needle guide 14 and in the armature 20.
- a filter element 25 is arranged in a central fuel feed 16.
- the fuel injection valve 1 is sealed by a seal 28 against a fuel line, not shown.
- Valve seat 6 is held in a sealing system.
- the magnet coil 10 When the magnet coil 10 is excited, it builds up a magnetic field, which the armature 20 counteracts the spring force of the Return spring 23 moves in the stroke direction, the stroke by a in the rest position between the. Inner pole 13 and the armature 20 working gap 27 is predetermined.
- the armature 20 takes the flange 21, which is welded to the valve needle 2, and thus also the valve needle 3 in the lifting direction.
- FIG. 2 shows in section II of FIG. 1 a detailed partial section of a first exemplary embodiment of a fuel injector 1 according to the invention.
- a seat body recess 38 is made in the nozzle body 2 at its downstream end, the radial extent of which is smaller than the radial extent of the valve seat body 5
- Seat body recess 38 tapers in the shape of a truncated cone to the downstream side of the nozzle body 2.
- the seat body recess 38 thus forms a contact surface 40 between the inside and the outside of the nozzle body 2.
- the valve seat body 5 is inserted from the inside of the nozzle body 2, so that it rests on the contact surface 40 of the seat body recess 38.
- the valve seat body 5 has a partially spherical outer contour 34 on its downstream side, at least in the region of the seat body recess 38.
- the center of the part-spherical outer contour 34 lies on the central axis 37 of the fuel injector 1.
- At the A valve seat surface 6 is introduced upstream of the valve seat body 5. Downstream of the valve seat 6 there is a spray opening 7.
- the valve closing body 4 is also partially spherical at its downstream end, the center of the spherical geometry of the valve closing body 4 preferably being identical to the center of the partially spherical outer contour 34. Upstream of the sealing seat, the valve closing body 4 is guided so that it can be easily moved in the axial direction.
- a guide recess 33 is made in a swirl disk 31 arranged upstream of the valve seat body 5.
- the gap formed between the guide recess 33 and the valve closing body 4 is designed to be hydraulically sealed.
- the fuel to be sprayed therefore only reaches the sealing seat through swirl channels 36.
- the swirl channels 36 can be introduced, for example, as grooves in the swirl disk 31, which are closed to swirl channels 36 by the upstream side of the valve seat body 5.
- the swirl channels 36 open out e.g. tangentially into the valve seat surface 6, so that when the fuel injector 1 is open, the fuel flow is acted upon by a U component.
- the swirl disk 31 and the valve seat body 5 are preferably connected to one another by a weld connection 32b.
- the assembly of the two components takes place before the actual assembly of the fuel injector 1.
- the valve seat body 5 and the swirl disk 31 are manufactured in two separate manufacturing processes. Then the two parts are placed on top of one another and the two central axes are brought into line, for example with the aid of a centering mandrel. In this position, the swirl disk 31 is connected to the valve seat body 5 by a weld connection 32a.
- welding other permanently stable fastening techniques, such as brazing, can also be used.
- the assembly consisting of swirl disk 31 and valve seat body 5 is now inserted into the nozzle body 2 with the part-spherical outer contour 34 first in the nozzle body 2.
- the positioning is again carried out, for example, by a centering mandrel.
- the position is fixed, again preferably using a welding process.
- the valve needle 3 and the valve closing body 4 it is also possible to use the valve needle 3 and the valve closing body 4.
- the alignment of the valve seat body 5 and the swirl disk 31 with respect to the nozzle body 2 can thus correct inevitable component tolerances.
- no additional work step has to be scheduled in the production of the fuel injection valve 1 if the valve needle 3 and the valve closing body 4 are used for centering.
- the valve seat body 5 can be rotated about any axis during assembly, which runs through the center of its part-spherical outer contour 34.
- the fuel injector 1 can e.g. fully assembled and in a last step the weld connection 32b e.g. produced by laser. Due to the frustoconical support surface of the seat body recess 38, the valve seat body 5 is not only held in the nozzle body 2 during the manufacturing process. The forces acting on the valve seat body 5 in the axial direction are also transmitted through the bearing surface to the nozzle body, so that the welded connection 32b only has a sealing function and fixes the position.
- FIG. 3 A second execution example.
- Spiel ei .nes fuel injector 1 according to the invention is shown in Fig. 3.
- the Seat body recess 38 is introduced into the nozzle body 2 such that the contact surface of the seat body recess 38 formed between the inside and outside of the nozzle body 2 has a partially spherical shape.
- the radius of this spherical geometry corresponds to the partially spherical outer contour 34 of the valve seat body 5.
- a complete assembly is inserted into the nozzle body.
- it is a pre-assembled composite of guide disk 39, into which a guide recess 33 is made, and a swirl disk 31, which has, for example, swirl channels 36 in the form of punched-out holes, which are provided by the guide disk 39 on the upstream side and the valve seat body 5 are closed on the downstream side.
- the guide disk 39 and swirl disk 31 are connected together with the valve seat body 5. This can be done, for example, by welding in accordance with the statements relating to FIG.
- valve 4 shows a third exemplary embodiment of a fuel injection valve according to the invention, in which the swirl generation and the guidance of the valve closing body 4 are integrated in the valve seat body 5.
- a seat body recess 38 is made in the nozzle body 2, which has a partially spherical geometry. This corresponds to a ball which is used as valve seat body 5.
- a ball bearing ball is preferably to be used as the valve closing body 5.
- a guide recess 33 is introduced into the valve seat body 5 to guide the valve closing body 4.
- swirl channels 36 for example, holes can be made in the ball, which open out into an annular channel 35 with a tangential component upstream of the valve seat surface 6.
- the swirl channels 36 open into the annular channel 35.
- the fuel flow which is set by, for example, four swirl channels 36 can be established uniform before the fuel is sprayed through the spray opening 7.
- the sprayed-off fuel can have a direction deviating from the central axis 37 of the fuel injection valve 1.
- the injection opening 7 introduced into the valve seat body 5 accordingly encloses an angle with the central axis 37 of the fuel injection valve 1 in order to deflect the fuel.
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/182,410 US6817635B2 (en) | 2000-11-29 | 2001-11-29 | Fuel injector and corresponding production method |
EP01995538A EP1339967A2 (de) | 2000-11-29 | 2001-11-29 | Brennstoffeinspritzventil und verfahren zu dessen herstellung |
JP2002546062A JP2004531664A (ja) | 2000-11-29 | 2001-11-29 | 燃料噴射弁及び、燃料噴射弁を製造するための方法 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10059263A DE10059263B4 (de) | 2000-11-29 | 2000-11-29 | Verfahren zur Herstellung bzw. zur Montage eines Brennstoffeinspritzventils |
DE10059263.5 | 2000-11-29 |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2002044547A2 true WO2002044547A2 (de) | 2002-06-06 |
WO2002044547A3 WO2002044547A3 (de) | 2002-09-19 |
Family
ID=7665108
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DE2001/004463 WO2002044547A2 (de) | 2000-11-29 | 2001-11-29 | Brennstoffeinspritzventil und verfahren zu dessen herstellung |
Country Status (5)
Country | Link |
---|---|
US (1) | US6817635B2 (de) |
EP (1) | EP1339967A2 (de) |
JP (1) | JP2004531664A (de) |
DE (1) | DE10059263B4 (de) |
WO (1) | WO2002044547A2 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1369571A1 (de) * | 2002-06-07 | 2003-12-10 | Magneti Marelli Powertrain S.p.A. | Verfahren zur Steuerung eines Kraftstoffeinspritzventils abhängig von der Einspritzungszeit |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8006715B2 (en) | 2007-09-20 | 2011-08-30 | Caterpillar Inc. | Valve with thin-film coating |
WO2019206898A1 (en) * | 2018-04-25 | 2019-10-31 | Robert Bosch Gmbh | Fuel injector valve seat assembly including an insert having anticoking features |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19625059A1 (de) | 1996-06-22 | 1998-01-02 | Bosch Gmbh Robert | Einspritzventil, insbesondere zum direkten Einspritzen von Kraftstoff in einen Brennraum eines Verbrennungsmotors |
DE19736682A1 (de) | 1997-08-22 | 1999-02-25 | Bosch Gmbh Robert | Brennstoffeinspritzventil |
Family Cites Families (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL76067C (de) * | 1900-01-01 | |||
GB324655A (en) * | 1928-10-30 | 1930-01-30 | Frederik Vilhelm Haugsted | Improvements in fuel injection valves for internal-combustion engines |
DE631135C (de) | 1934-08-19 | 1936-06-12 | Wanderer Werke Vorm Winklhofer | Verfahren zur Herstellung von aus mehreren Teilen zusammengesetzten Dueseneinsaetzen |
US3118611A (en) * | 1963-02-04 | 1964-01-21 | Martin J Berlyn | Fuel injection nozzle |
DE3418436A1 (de) * | 1984-05-18 | 1985-11-21 | Robert Bosch Gmbh, 7000 Stuttgart | Elektromagnetisch betaetigbares ventil und verfahren zur herstellung eines ventils |
US4778107A (en) * | 1986-08-21 | 1988-10-18 | Nippondenso Co., Ltd. | Fuel injection valve assembly and an assembling method therefor |
DE3738558A1 (de) * | 1986-11-25 | 1988-07-28 | Volkswagen Ag | Kraftstoffeinspritzeinrichtung |
JPH0710471B2 (ja) * | 1989-09-25 | 1995-02-08 | 株式会社日立製作所 | 複数部材からなる精密部品の同心結合方法、及びこれを利用した燃料噴射弁のノズル組立方法 |
US5330100A (en) * | 1992-01-27 | 1994-07-19 | Igor Malinowski | Ultrasonic fuel injector |
JPH0874699A (ja) | 1994-09-09 | 1996-03-19 | Zexel Corp | 燃料噴射弁 |
US5467924A (en) | 1994-09-20 | 1995-11-21 | Alfred J. Buescher | Unit injector optimized for reduced exhaust emissions |
US5692723A (en) * | 1995-06-06 | 1997-12-02 | Sagem-Lucas, Inc. | Electromagnetically actuated disc-type valve |
DE19527049A1 (de) * | 1995-07-25 | 1997-01-30 | Bosch Gmbh Robert | Brennstoffeinspritzventil |
US6168135B1 (en) * | 1998-05-15 | 2001-01-02 | Siemens Automotive Corporation | Slotted housing for fuel injector |
JP3337641B2 (ja) * | 1998-05-20 | 2002-10-21 | 株式会社育良精機製作所 | 棒材供給機 |
DE69841890D1 (de) * | 1998-10-09 | 2010-10-21 | Jun Arimoto | Brennstoffeinspritzventil für dieselmotoren |
US6065692A (en) * | 1999-06-09 | 2000-05-23 | Siemens Automotive Corporation | Valve seat subassembly for fuel injector |
US6257496B1 (en) * | 1999-12-23 | 2001-07-10 | Siemens Automotive Corporation | Fuel injector having an integrated seat and swirl generator |
-
2000
- 2000-11-29 DE DE10059263A patent/DE10059263B4/de not_active Expired - Fee Related
-
2001
- 2001-11-29 EP EP01995538A patent/EP1339967A2/de not_active Withdrawn
- 2001-11-29 US US10/182,410 patent/US6817635B2/en not_active Expired - Fee Related
- 2001-11-29 JP JP2002546062A patent/JP2004531664A/ja not_active Withdrawn
- 2001-11-29 WO PCT/DE2001/004463 patent/WO2002044547A2/de not_active Application Discontinuation
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19625059A1 (de) | 1996-06-22 | 1998-01-02 | Bosch Gmbh Robert | Einspritzventil, insbesondere zum direkten Einspritzen von Kraftstoff in einen Brennraum eines Verbrennungsmotors |
DE19736682A1 (de) | 1997-08-22 | 1999-02-25 | Bosch Gmbh Robert | Brennstoffeinspritzventil |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1369571A1 (de) * | 2002-06-07 | 2003-12-10 | Magneti Marelli Powertrain S.p.A. | Verfahren zur Steuerung eines Kraftstoffeinspritzventils abhängig von der Einspritzungszeit |
US6981489B2 (en) | 2002-06-07 | 2006-01-03 | Magneti Marelli Powertrain S.P.A. | Method for controlling a fuel injector according to a control law which is differentiated as a function of injection time |
Also Published As
Publication number | Publication date |
---|---|
DE10059263A1 (de) | 2002-06-13 |
US6817635B2 (en) | 2004-11-16 |
WO2002044547A3 (de) | 2002-09-19 |
DE10059263B4 (de) | 2007-10-18 |
US20030132321A1 (en) | 2003-07-17 |
JP2004531664A (ja) | 2004-10-14 |
EP1339967A2 (de) | 2003-09-03 |
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