EP1307648A1 - Brennstoffeinspritzventil - Google Patents
BrennstoffeinspritzventilInfo
- Publication number
- EP1307648A1 EP1307648A1 EP01962561A EP01962561A EP1307648A1 EP 1307648 A1 EP1307648 A1 EP 1307648A1 EP 01962561 A EP01962561 A EP 01962561A EP 01962561 A EP01962561 A EP 01962561A EP 1307648 A1 EP1307648 A1 EP 1307648A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- armature
- fuel injection
- guide sleeve
- valve needle
- injection valve
- 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 31
- 239000007924 injection Substances 0.000 title claims abstract description 31
- 238000002485 combustion reaction Methods 0.000 claims abstract description 5
- 239000000446 fuel Substances 0.000 claims description 58
- 238000007789 sealing Methods 0.000 claims description 7
- 239000000344 soap Substances 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 description 6
- 239000007921 spray Substances 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 238000002360 preparation method Methods 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
- F02M61/20—Closing valves mechanically, e.g. arrangements of springs or weights or permanent magnets; Damping of valve lift
- F02M61/205—Means specially adapted for varying the spring tension or assisting the spring force to close the injection-valve, e.g. with 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
- 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
- F02M51/0685—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 and the valve being allowed to move relatively to each other or not being attached to each other
-
- 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
- F02M61/12—Other injectors with elongated valve bodies, i.e. of needle-valve type characterised by the provision of guiding or centring means for valve bodies
-
- 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
- F02M61/165—Filtering elements specially adapted in fuel inlets to injector
-
- 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 injection valve according to the preamble of the main claim.
- an electromagnetically actuated fuel injection valve in which an armature interacts with an electrically excitable solenoid for electromagnetic actuation and the stroke of the armature is transmitted to a valve closing body via a valve needle.
- the valve closing body interacts with a valve seat.
- the armature is not rigidly attached to the valve needle, but is axially movable relative to the valve needle.
- a first return spring acts on the valve needle in the closing direction and thus keeps the fuel injector closed when the solenoid is de-energized and not energized.
- the armature is acted upon in the stroke direction by means of a second return spring such that the armature in the rest position rests against a first stop provided on the valve needle.
- the solenoid coil When the solenoid coil is energized, the armature is pulled in the stroke direction and takes the valve needle with it at the first stop.
- the valve needle When the current exciting the solenoid coil is switched off, the valve needle is moved into its closed position by means of the first return spring accelerates and carries the anchor with the stop described.
- the closing movement of the valve needle is abruptly ended.
- the movement of the armature, which is not rigidly connected to the valve needle continues counter to the stroke direction and is absorbed by the second return spring, ie the armature swings through against the second return spring, which has a substantially lower spring constant than the first return spring.
- the second return spring finally accelerates the armature again in the stroke direction.
- a disadvantage of the fuel injector known from DE-OS 33 14 899 is, on the one hand, the incomplete debouncing, on the other hand, the arrangement of the armature and valve needle can cause jamming or jamming due to the center offset of the valve needle or the armature. This is exacerbated by manufacturing errors in the individual components of the fuel injector and thereby leads to malfunctions of the fuel injector.
- the fuel injector shown in US Pat. No. 5,299,776, however, is provided with a so-called flat armature, which is not guided in the valve housing, but moves freely to the inner pole of the coil.
- the valve needle has only one guide sleeve on which the return spring is supported.
- a guide body which is connected to the valve housing and which surrounds the valve needle but is not non-positively connected to it serves as the lower guide unit.
- the fuel injector according to the invention with the characterizing features of claim 1 has the advantage that the radial and axial play caused by the two guide sleeves and by the central recess of the armature of the valve needle on the one hand so much
- Fuel injector for example, with low manufacturing costs and low production costs
- Deep drawing can be manufactured, since the tolerance of the construction according to the invention against manufacturing defects of the components is very high.
- the wedge-shaped or spherical design of the guide sleeves or the corresponding elevations of the armature end faces is also advantageous, which compensates for angular errors of the valve needle relative to the longitudinal axis of the fuel injector.
- valve needle can thereby always be optimally aligned even with large center offsets.
- FIG. 1 shows a schematic section through a first exemplary embodiment of a fuel injector according to the invention
- FIG. 2 is an enlarged, schematic section through the invention shown in Fig. 1
- FIG. 3 shows an enlarged, schematic section through a second exemplary embodiment of a fuel injector according to the invention in area II in FIG. 1.
- a fuel injector 1 is in the form of a fuel injector for fuel injection systems of mixed compression, spark-ignited
- the fuel injection valve 1 is particularly suitable for injecting fuel directly into a combustion chamber (not shown) of an internal combustion engine.
- the fuel injector 1 consists of a nozzle body 2, in which a valve needle 3 is guided.
- the "Valve needle 3 is in operative connection with a valve-closure member 4 which cooperates with a valve seat arranged on a body 5 valve seat surface 6 to eiiiem sealing seat.
- a valve-closure member 4 which cooperates with a valve seat arranged on a body 5 valve seat surface 6 to eiiiem sealing seat.
- it is an inwardly opening fuel injection valve 1 which has a spray opening 7.
- valve needle 3 is rotatably mounted in the sealing seat in order to enable simple Madel guidance.
- the swirl preparation of the fuel injection valve 1 is not affected by this since the valve needle 3 is designed to be rotationally symmetrical.
- the nozzle body 2 is sealed by a seal 8 against the outer pole 9 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 valve needle guide 14, which is disc-shaped.
- a paired adjusting disk 15 is used for stroke adjustment.
- An armature 20 is located on the other side of the adjusting disk 15. This armature is non-positively connected via a first guide sleeve 35 to the valve needle 3, which is connected to the first guide sleeve 35 by a weld seam 22.
- a restoring spring 23 is supported on the first guide sleeve 35, which in the present design of the fuel injection valve 1 is preloaded by a sleeve 24.
- a second guide sleeve 36 which is connected to the valve needle 3 via a weld 33, serves as the lower anchor stop.
- the armature 20 has a central recess 34 through which the valve needle 3 projects.
- the radial diameter of the central recess 34 is larger than that Diameter of the valve needle 3, so that the armature 20 has a radial play relative to the valve needle 3. This measure, in conjunction with the guide sleeves 35 and 36, ensures that the valve needle 3 does not become jammed or jammed.
- valve needle guide 14 in the armature 20 and on the valve seat body 5, fuel channels 30a to 30c run, which guide the fuel, which is supplied via a central fuel supply 16 and filtered by a filter element 25, to the spray-discharge opening 7.
- the fuel injection valve 1 is sealed by a seal 28 against a cylinder head or a fuel distributor line (not shown).
- the valve needle 3 In the idle state of the fuel injector 1, the valve needle 3 is struck by the return spring 23 via the first guide sleeve 35 against the stroke direction so that the valve closing body 4 is held on the valve seat 6 in sealing contact.
- the magnetic coil 10 When the magnetic coil 10 is excited, it builds up a magnetic field which is freely movable between the guide sleeves 35 and 36. Armature 20 first pulls on the first guide sleeve 35 and then moves the armature 20 with the valve needle 3 and the first guide sleeve 35 against the spring force of the return spring 23 in the stroke direction.
- the valve needle 3 takes the second guide sleeve 36, which is welded to the valve needle 3, also in the stroke direction.
- the valve closing body 4, which is operatively connected to the valve needle 3, lifts off the valve seat surface 6 and fuel is sprayed off via the spray opening 7.
- FIG. 2 shows an excerpt, highly schematic representation of the area designated II in FIG. 1.
- the armature 20 is arranged between the first guide sleeve 35, on which the return spring 23 is supported, and the second guide sleeve 36.
- a radial clearance of the armature 20 is ensured by the central recess 34 of the armature 20, the diameter of which is selected to be slightly larger than the diameter of the valve needle 3 passing through the armature 20. Since a first gap 43 is formed between the first end face 37 of the armature 20 and the first guide sleeve 35 and a second gap 44 is formed between the second end face 38 of the armature 20 and the second guide sleeve 36, there is also a slight axial play.
- the armature 20 is guided precisely and precisely only through the outer pole 9 of the fuel injector 1, which is of sleeve-shaped design in the present first exemplary embodiment.
- the sleeve-shaped component identified by the reference sign 9 can also be a non-magnetic thin-walled sleeve as part of the valve housing.
- the guide sleeves 35 and 36 are in turn guided in the inner pole 13 and in the nozzle body 2 of the fuel injector 1 with a slight play.
- the guide sleeves 35 and 36 are firmly connected to the valve needle 3, preferably welded. This ensures that, on the one hand, the rotational symmetry of the valve needle 3 is maintained and that the valve needle 3 or the armature 20 is guided correctly even with a high center offset or large manufacturing inaccuracies of the parts used. If the current exciting the magnetic coil 10 is switched on, the armature 20 is pulled to the inner pole 9 after the magnetic field has built up sufficiently.
- the armature 20 takes the valve needle 3 against the force of the return spring 23 via the first guide sleeve 35, as a result of which the fuel injection valve 1 is opened.
- the armature 20 Since the first gap 43 is located between the first guide sleeve 35 and the armature 20, the armature 20 is first accelerated by the magnetic field before the magnetic field 20 has to do lifting work against the force of the return spring 23 when the armature is tightened. As a result, in addition to ensuring the freely movable armature 20 or the tilt-free operation of the valve needle 3, the opening times of the fuel injector 1 can also be improved.
- the armature 20 is first pressed away from the inner pole 13 by the return spring 23 and pre-accelerated via the stroke of the second gap 44 before the armature 20 takes the valve needle 3 with it and the fuel injection valve 1 is closed.
- the closing times of the fuel injector 1 can also be improved. Overall, these measures also improve the accuracy of the metered fuel.
- Fig. 3 shows in the same view as Fig. 2, a second embodiment of the invention
- the surfaces 39 and 40 of the guide sleeves 35 and 35 facing the end faces 37 and 38 of the armature 20 are wedge-shaped or cone-shaped in the present second exemplary embodiment.
- Elevations 41 and 42, which are on the end faces 37 and., Serve as corresponding stop areas for the wedge-shaped surfaces 39 and 40 of the guide sleeves 35 and 36 38 of the armature 20 are rotationally symmetrical and are, for example, frustoconical or spherical or dome-shaped.
- the elevations 41 and 42 formed in this way are mortised with the wedge-shaped surfaces 39 and 40 and thus ensure a more precise guidance of the valve needle 3 in the guide sleeves 35 and 36 without restricting the free movement of the armature 20 or the rotational symmetry of the valve needle 3.
- the armature 20 cannot come loose from the troughs of the wedge-shaped surfaces 39 and 40 of the guide sleeves 35 and 36.
- the valve needle 3 can therefore not jam or jam.
- the invention is not limited to the exemplary embodiments shown and can also be used for a large number of other, in particular also for outwardly opening, fuel injection valves.
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 |
---|---|---|---|
DE10036811A DE10036811A1 (de) | 2000-07-28 | 2000-07-28 | Brennstoffeinspritzventil |
DE10036811 | 2000-07-28 | ||
PCT/DE2001/002700 WO2002010584A1 (de) | 2000-07-28 | 2001-07-18 | Brennstoffeinspritzventil |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1307648A1 true EP1307648A1 (de) | 2003-05-07 |
EP1307648B1 EP1307648B1 (de) | 2005-12-28 |
Family
ID=7650539
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP01962561A Expired - Lifetime EP1307648B1 (de) | 2000-07-28 | 2001-07-18 | Brennstoffeinspritzventil |
Country Status (5)
Country | Link |
---|---|
US (1) | US6824084B2 (de) |
EP (1) | EP1307648B1 (de) |
JP (1) | JP2004505205A (de) |
DE (2) | DE10036811A1 (de) |
WO (1) | WO2002010584A1 (de) |
Families Citing this family (20)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10256662A1 (de) * | 2002-12-04 | 2004-06-17 | Robert Bosch Gmbh | Brennstoffeinspritzventil |
JP2006097659A (ja) * | 2004-09-30 | 2006-04-13 | Nippon Soken Inc | 燃料噴射弁 |
US7472844B2 (en) * | 2005-12-21 | 2009-01-06 | Caterpillar Inc. | Fuel injector nozzle with tip alignment apparatus |
US8387599B2 (en) | 2008-01-07 | 2013-03-05 | Mcalister Technologies, Llc | Methods and systems for reducing the formation of oxides of nitrogen during combustion in engines |
US8561598B2 (en) * | 2008-01-07 | 2013-10-22 | Mcalister Technologies, Llc | Method and system of thermochemical regeneration to provide oxygenated fuel, for example, with fuel-cooled fuel injectors |
JP4935882B2 (ja) * | 2009-03-05 | 2012-05-23 | 株式会社デンソー | 燃料噴射弁 |
JP5520751B2 (ja) * | 2010-08-31 | 2014-06-11 | 日立オートモティブシステムズ株式会社 | 燃料噴射弁 |
EP2852753B1 (de) * | 2012-05-08 | 2019-07-17 | CPT Group GmbH | Ventilanordnung für ein einspritzventil und einspritzventil |
DE102012215779A1 (de) * | 2012-09-06 | 2014-03-06 | Robert Bosch Gmbh | Einspritzventil |
JP6253259B2 (ja) | 2012-09-26 | 2017-12-27 | 株式会社デンソー | 燃料噴射弁 |
US9115325B2 (en) | 2012-11-12 | 2015-08-25 | Mcalister Technologies, Llc | Systems and methods for utilizing alcohol fuels |
JP5994642B2 (ja) * | 2013-01-07 | 2016-09-21 | マツダ株式会社 | 直噴エンジンの燃料噴射装置 |
DE102013214951A1 (de) * | 2013-07-31 | 2015-02-05 | Robert Bosch Gmbh | Magnetbaugruppe für ein Ventil sowie Ventil |
DE102013223458A1 (de) | 2013-11-18 | 2015-05-21 | Robert Bosch Gmbh | Ventil zum Zumessen von Fluid |
JP6187422B2 (ja) | 2014-09-17 | 2017-08-30 | 株式会社デンソー | 燃料噴射弁 |
US20170254304A1 (en) * | 2014-09-17 | 2017-09-07 | Denso Corporation | Fuel injection valve |
JP6468109B2 (ja) * | 2015-07-21 | 2019-02-13 | 株式会社デンソー | 燃料噴射弁 |
DE102015214171A1 (de) * | 2015-07-27 | 2017-02-02 | Robert Bosch Gmbh | Ventil zum Zumessen eines Fluids |
JP6175475B2 (ja) * | 2015-11-20 | 2017-08-02 | 株式会社ケーヒン | 電磁式燃料噴射弁 |
EP3260695B8 (de) * | 2016-06-24 | 2019-07-17 | CPT Group GmbH | Ventilanordnung für ein einspritzventil und einspritzventil |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2651744A (en) * | 1949-02-02 | 1953-09-08 | Mcquaynorris Mfg Company | Control device |
DE3314899A1 (de) | 1983-04-25 | 1984-10-25 | Mesenich, Gerhard, Dipl.-Ing., 4630 Bochum | Federanordnung mit zusatzmasse zur verbesserung des dynamischen verhaltens von elektromagnetsystemen |
DE3408012A1 (de) * | 1984-03-05 | 1985-09-05 | Gerhard Dipl.-Ing. Warren Mich. Mesenich | Elektromagnetisches einspritzventil |
DE3808671A1 (de) * | 1987-03-13 | 1988-09-22 | Orbital Eng Pty | Vorrichtung und verfahren zur kraftstoffeinspritzung |
JP2757317B2 (ja) * | 1989-11-09 | 1998-05-25 | ヤマハ発動機株式会社 | 高圧燃料噴射装置 |
US5299776A (en) | 1993-03-26 | 1994-04-05 | Siemens Automotive L.P. | Impact dampened armature and needle valve assembly |
US5661895A (en) * | 1995-07-25 | 1997-09-02 | Outboard Marine Corporatin | Method of controlling the magnetic gap length and the initial stroke length of a pressure surge fuel pump |
DE19849210A1 (de) * | 1998-10-26 | 2000-04-27 | Bosch Gmbh Robert | Brennstoffeinspritzventil |
-
2000
- 2000-07-28 DE DE10036811A patent/DE10036811A1/de not_active Withdrawn
-
2001
- 2001-07-18 DE DE50108563T patent/DE50108563D1/de not_active Expired - Lifetime
- 2001-07-18 EP EP01962561A patent/EP1307648B1/de not_active Expired - Lifetime
- 2001-07-18 WO PCT/DE2001/002700 patent/WO2002010584A1/de active IP Right Grant
- 2001-07-18 US US10/089,584 patent/US6824084B2/en not_active Expired - Fee Related
- 2001-07-18 JP JP2002516479A patent/JP2004505205A/ja active Pending
Non-Patent Citations (1)
Title |
---|
See references of WO0210584A1 * |
Also Published As
Publication number | Publication date |
---|---|
DE10036811A1 (de) | 2002-02-07 |
US20030047626A1 (en) | 2003-03-13 |
US6824084B2 (en) | 2004-11-30 |
EP1307648B1 (de) | 2005-12-28 |
DE50108563D1 (de) | 2006-02-02 |
WO2002010584A1 (de) | 2002-02-07 |
JP2004505205A (ja) | 2004-02-19 |
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