EP1042610A1 - Brennstoffeinspritzventil - Google Patents
BrennstoffeinspritzventilInfo
- Publication number
- EP1042610A1 EP1042610A1 EP99924732A EP99924732A EP1042610A1 EP 1042610 A1 EP1042610 A1 EP 1042610A1 EP 99924732 A EP99924732 A EP 99924732A EP 99924732 A EP99924732 A EP 99924732A EP 1042610 A1 EP1042610 A1 EP 1042610A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- valve
- valve seat
- spring
- fuel injection
- closing body
- 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
- F02M61/20—Closing valves mechanically, e.g. arrangements of springs or weights or permanent magnets; Damping of valve lift
-
- 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
- F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
- F02M2200/50—Arrangements of springs for valves used in fuel injectors or fuel injection pumps
-
- 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
-
- 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
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T137/00—Fluid handling
- Y10T137/8593—Systems
- Y10T137/86493—Multi-way valve unit
- Y10T137/86574—Supply and exhaust
- Y10T137/86622—Motor-operated
Definitions
- the invention relates to a fuel injector according to the preamble of the main claim.
- a fuel injector which is equipped as an electromagnetically actuated valve with a magnetic circuit and a seat valve.
- a fuel filter is pressed into a core serving as a fuel inlet connector at its inlet end, which is intended to keep dirt particles away from the seating area.
- an adjusting sleeve and a helical return spring are arranged in the longitudinal opening of the core. The pressed-in adjusting sleeve serves to adjust the spring preload of the restoring spring resting on it, which is supported with its downstream end on the valve needle and, when the magnet coil is not energized, presses the valve closing body against a valve seat in the closing direction of the valve.
- the fuel injector according to the invention with the characterizing features of the main claim has the advantage that it is particularly small and compact.
- a spring element connects the valve closing body to the valve seat body.
- Valve closing body must be molded during its axial movement, since the spring element guides the valve closing body and pulls exactly into the valve seat body.
- the spring element is simultaneously designed as a filter element.
- the diaphragm spring which is provided with a large number of holes, enables particles from the fuel near the valve, which impair the tightness of the valve, to be filtered out
- Valve seat By using a diaphragm spring with spring and filter function, both a fuel filter arranged in known fuel injectors in the fuel inlet port and the return spring and adjusting sleeve that usually follow downstream in the fuel inlet port or core can be replaced, so that the component expenditure is reduced even more significantly.
- FIG. 1 shows a partially illustrated injection valve with a diaphragm spring according to the invention
- FIG. 2 shows a diaphragm spring as an individual component according to FIG. 1
- FIG. 3 shows a second diaphragm spring in a section of an injection valve.
- FIG. 1 shows an exemplary embodiment of an injection valve for fuel injection systems of mixture-compressing spark-ignition internal combustion engines.
- the injection valve has a tubular valve seat support 1, in which a longitudinal opening 3 is formed concentrically with a valve longitudinal axis 2. In the longitudinal opening 3 is a z.
- tubular valve needle 5 arranged, which is connected at its downstream end 6 to a spherical valve closing body 7.
- the injection valve is actuated in a known manner, for example electromagnetically. For the axial movement of the
- Valve needle 5 and thus for opening against the spring force of a spring element 9 acting on the valve closing body 7, acting as a return spring or closing the injection valve, is an 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 facing away from the valve needle 5 by z.
- Valve seat support 1 is concentric with the longitudinal axis of the valve
- valve seat body 16 tightly mounted by welding.
- the valve seat body 16 is, for example, stepped on the outer circumference, the circumference of the valve seat body 16 having only a slightly smaller diameter at its lower end than the longitudinal opening
- Valve closing body 7 facing away from the lower end face 17 is the valve seat body 16 with a bottom part 20 of a z. B. pot-shaped spray plate 21 concentrically and firmly connected so that the bottom part 20 abuts with its upper end face 22 on the lower end face 17 of the valve seat body 16.
- the base part 20 of the spray perforated disk 21 has at least one, for example four, spray openings 25 formed by eroding or stamping.
- a circumferential holding edge closes the base part 20 26, which extends in the axial direction facing away from the valve seat body 16 and is bent somewhat conically outwards.
- valve seat part consisting of valve seat body 16 and cup-shaped spray orifice plate 21 into the longitudinal opening 3 determines the presetting of the stroke of the valve needle 5, since the one end position of the valve needle 5 when the magnet coil 10 is not energized due to the valve closing body 7 resting on a valve seat surface 29 of the valve seat body 16 is set.
- Valve closing body 7 interacts with the valve seat surface 29 of the valve seat body 16, which tapers in the shape of a truncated cone in the direction of flow, as a seat valve.
- the other end position of the valve needle 5 is determined when the solenoid 10 is excited, for example by the armature 11 resting on the core 12. The path between these two end positions of the valve needle 5 thus represents the stroke.
- valve seat body 16 and the spray orifice plate 21 and of the spray orifice plate 21 and the valve seat support 1 is required so that the fuel does not pass between the longitudinal opening 3 of the valve seat support 1 and the circumference of the valve seat body 16 to the spray openings 25 or between the longitudinal opening 3 of the valve seat support 1 and the holding edge 26 of the spray plate 21 can flow directly into an intake line of the internal combustion engine.
- the spring element 9 is preferably designed as a diaphragm spring. Between the valve closing body 7 and the Valve seat body 16 extends the diaphragm spring 9, which is designed as a sleeve-shaped body. In Figure 2, a diaphragm spring 9 is shown as an individual component on an enlarged scale, so that the structural design is clear.
- the diaphragm spring fulfills several functions in the injection valve by acting on the one hand as a return spring, which pulls the valve closing body 7 against the valve seat surface 29 when the magnet coil 10 is not energized, and on the other hand also acts as a filter element.
- a plurality of holes 32 are made in a flat raw material (for example a rolled sheet metal) in a first production step in order to achieve the diaphragm spring 9 according to the invention, for example by means of stamping, eroding or laser drilling. Only then is this flat raw material brought into a closed sleeve shape with appropriate punch or mandrel tools and a desired spring structure 33 is formed in the form of a fold, for example by pressing.
- the spring structure 33 is introduced in coordination with the magnetic circuit sizes in such a way that the spring force when the magnet coil 10 is energized is easily overcome by the pulling force acting on the valve closing body 7 and when the magnet coil 10 is de-energized the valve closes rapidly.
- the spring structure 33 is introduced, for example, in an axially central region of the diaphragm spring 9, which extends in the downstream direction in the shape of a truncated cone. Fastening regions 34, 35 adjoin on both sides of this middle spring region, the first fastening region 34 having a significantly smaller diameter than the second fastening region 35. With the first fastening region 34, the diaphragm spring 9 envelops the valve closing body 7, while the second fastening region 35 at least partially surrounds the valve seat body 16 on the outer circumference.
- Both fastening areas 34, 35 of the diaphragm spring 9 are fixedly connected to the valve closing body 7 or the valve seat body 16, for example by means of an annular first and second weld seam 36, 37 or several weld spots set over the circumference each achieved by laser welding.
- the second fastening region 35 is, for example, cylindrical by angling from the frustoconical contour of the diaphragm spring 9. The attachment to the valve seat body 16 is thus facilitated.
- valve seat body 16 has an at least partially conical outer circumference on which the second fastening region 35 bears.
- the membrane spring 9 provided with a large number of holes 32 enables particles which impair the tightness of the valve to be filtered out of the fuel near the valve seat 16, 29.
- the at least 100 or also significantly more holes 32 have a diameter which is not greater than 50 to 60 ⁇ m should be in order to guarantee the filter function without restrictions.
- Diaphragm spring 9 with spring and filter function can be replaced both a fuel filter arranged in known fuel injectors in the fuel inlet port and a return spring which usually follows downstream in the fuel inlet port or core, so that the component expenditure in the present invention is significantly reduced. It is also advantageous that no exact guide opening for guiding the valve needle 5 or the valve closing body 7 has to be formed in the valve seat body 16 during its axial movement, since the diaphragm spring 9 guides the valve closing body 7 and pulls exactly into the valve seat body 16.
- the dynamic spray quantity is set e.g. such that the membrane spring 9 is first attached to the valve needle 5 and specifically to the valve closing body 7 (weld seam 36).
- the valve seat part together with the valve needle 5 and / or the armature 11 and the diaphragm spring 9 attached to it, is brought into an adjustment station and treated there separately as a valve assembly for the time being.
- a test valve head subsequently receives this valve assembly, the lower end of the diaphragm spring 9 being held in place.
- the valve seat part is then displaced in the axial direction into the diaphragm spring 9 from below, for example with the aid of a stepping motor, the valve being excited at the same time and the dynamic injection quantity being measured.
- the diaphragm spring 9 can be attached to the valve seat body 16 by means of the second weld seam 37.
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)
- Fuel-Injection Apparatus (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19835693A DE19835693A1 (de) | 1998-08-07 | 1998-08-07 | Brennstoffeinspritzventil |
DE19835693 | 1998-08-07 | ||
PCT/DE1999/000970 WO2000008333A1 (de) | 1998-08-07 | 1999-03-31 | Brennstoffeinspritzventil |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1042610A1 true EP1042610A1 (de) | 2000-10-11 |
EP1042610B1 EP1042610B1 (de) | 2004-08-11 |
Family
ID=7876758
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP99924732A Expired - Lifetime EP1042610B1 (de) | 1998-08-07 | 1999-03-31 | Brennstoffeinspritzventil |
Country Status (6)
Country | Link |
---|---|
US (1) | US6279841B1 (de) |
EP (1) | EP1042610B1 (de) |
JP (1) | JP2002522695A (de) |
DE (2) | DE19835693A1 (de) |
ES (1) | ES2226389T3 (de) |
WO (1) | WO2000008333A1 (de) |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10023322A1 (de) * | 2000-05-12 | 2001-11-15 | Bosch Gmbh Robert | Kraftstoffeinspritzventil für Brenkraftmaschinen |
US6446885B1 (en) * | 2001-01-16 | 2002-09-10 | Robert Bosch Corporation | Secondary filter assembly for fuel injector |
US6742340B2 (en) | 2002-01-29 | 2004-06-01 | Affordable Turbine Power Company, Inc. | Fuel injection control system for a turbine engine |
DE10213382A1 (de) * | 2002-03-26 | 2003-10-16 | Bosch Gmbh Robert | Kraftstoffeinspritzventil |
DE10256667A1 (de) * | 2002-12-04 | 2004-07-29 | Robert Bosch Gmbh | Brennstoffeinspritzventil |
US7237731B2 (en) * | 2003-08-19 | 2007-07-03 | Siemens Vdo Automotive Corporation | Fuel injector with a deep pocket seat and method of maintaining spatial orientation |
JP2005090233A (ja) * | 2003-09-12 | 2005-04-07 | Hitachi Unisia Automotive Ltd | 燃料噴射弁 |
JP2005096377A (ja) * | 2003-09-26 | 2005-04-14 | Brother Ind Ltd | 印刷装置及び印刷方法 |
ATE390553T1 (de) * | 2005-11-02 | 2008-04-15 | Delphi Tech Inc | Innerer filter für ein kraftstoffeinspritzventil |
DE602007004084D1 (de) * | 2007-05-24 | 2010-02-11 | Continental Automotive Gmbh | Ventilanordnung für ein Einspritzventil und Einspritzventil |
US20090256009A1 (en) * | 2008-04-10 | 2009-10-15 | Perry Robert B | Protection device for a lower guide system of a fuel injector |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4065058A (en) * | 1976-05-21 | 1977-12-27 | General Motors Corporation | Fuel injection nozzle with compressible valve |
JPS571807A (en) * | 1980-06-04 | 1982-01-07 | Hitachi Ltd | Hydraulic servo-valve |
DE3139288A1 (de) * | 1981-10-02 | 1983-04-21 | Robert Bosch Gmbh, 7000 Stuttgart | Kraftstoff-einspritzduese fuer brennkraftmaschinen |
DE3336010A1 (de) * | 1983-10-04 | 1985-04-18 | Robert Bosch Gmbh, 7000 Stuttgart | Elektromagnetisch betaetigbares ventil |
DE3630092A1 (de) * | 1986-09-04 | 1988-03-17 | Bosch Gmbh Robert | Elektromagnetisch betaetigbares ventil |
DE3714693A1 (de) * | 1987-05-02 | 1988-11-10 | Bosch Gmbh Robert | Elektromagnetisch betaetigbares ventil |
DE4003227C1 (en) | 1990-02-03 | 1991-01-03 | Robert Bosch Gmbh, 7000 Stuttgart, De | EM fuel injection valve for IC engine - has two overlapping parts welded together as narrowed section of one part |
DE4140070C2 (de) | 1991-12-05 | 1995-08-31 | Daimler Benz Ag | Kraftstoffeinspritzventil für Brennkraftmaschinen |
EP0629266B1 (de) | 1992-03-05 | 1996-12-18 | Siemens Automotive Corporation | Brennstoffeinspritzdüse mit internen filter |
DE19638201B4 (de) | 1996-09-19 | 2005-05-04 | Robert Bosch Gmbh | Brennstoffeinspritzventil |
-
1998
- 1998-08-07 DE DE19835693A patent/DE19835693A1/de not_active Withdrawn
-
1999
- 1999-03-31 DE DE59910198T patent/DE59910198D1/de not_active Expired - Fee Related
- 1999-03-31 JP JP2000563939A patent/JP2002522695A/ja active Pending
- 1999-03-31 WO PCT/DE1999/000970 patent/WO2000008333A1/de active IP Right Grant
- 1999-03-31 EP EP99924732A patent/EP1042610B1/de not_active Expired - Lifetime
- 1999-03-31 ES ES99924732T patent/ES2226389T3/es not_active Expired - Lifetime
- 1999-03-31 US US09/509,977 patent/US6279841B1/en not_active Expired - Fee Related
Non-Patent Citations (1)
Title |
---|
See references of WO0008333A1 * |
Also Published As
Publication number | Publication date |
---|---|
US6279841B1 (en) | 2001-08-28 |
WO2000008333A1 (de) | 2000-02-17 |
ES2226389T3 (es) | 2005-03-16 |
DE59910198D1 (de) | 2004-09-16 |
DE19835693A1 (de) | 2000-02-10 |
JP2002522695A (ja) | 2002-07-23 |
EP1042610B1 (de) | 2004-08-11 |
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