EP1387941A1 - Fuel injection valve comprising a damping element between the armature and the valve needle - Google Patents
Fuel injection valve comprising a damping element between the armature and the valve needleInfo
- Publication number
- EP1387941A1 EP1387941A1 EP02732382A EP02732382A EP1387941A1 EP 1387941 A1 EP1387941 A1 EP 1387941A1 EP 02732382 A EP02732382 A EP 02732382A EP 02732382 A EP02732382 A EP 02732382A EP 1387941 A1 EP1387941 A1 EP 1387941A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- armature
- damping element
- fuel injection
- sleeve
- valve needle
- 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
- 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
- F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
- F02M2200/30—Fuel-injection apparatus having mechanical parts, the movement of which is damped
- F02M2200/306—Fuel-injection apparatus having mechanical parts, the movement of which is damped using mechanical means
Definitions
- the invention is based on a fuel f injection valve of the type of the main claim.
- Fuel injector which has a valve closing body connected to a valve needle, which cooperates with a valve seat f surface formed on a valve seat body to form a sealing seat.
- a fuel injector is provided with a solenoid which interacts with an armature which is non-positively connected to the valve needle.
- An additional mass is provided in a cylindrical shape around the armature and the valve needle, which is connected to the armature via an elastomer layer.
- a disadvantage here is the complex design with an additional component.
- the large-area elastomer ring is also unfavorable for the course of the magnetic field and complicates the closing of the field lines and thus the achievement of high tightening forces during the opening movement of the fuel injection valve.
- a further zylinderför ige mass is provided for damping and debouncing around the armature and the valve needle, which is clamped and held in position by two elastomer rings. When the valve needle strikes the sealing seat, this second mass can move relative to the armature and valve needle and prevent the valve needle from bouncing.
- a disadvantage of the described embodiment is the additional effort and space requirement.
- the anchor itself is also not decoupled. His impulse thus increases the tendency for the valve needle to bounce.
- the fuel injector according to the invention with the characterizing features of the main claim has the advantage that the damping element: is arranged in a recess of the armature, whereby on the one hand the armature is prevented from rotating and on the other hand costly additional components and assembly costs can be saved.
- the pot-shaped design of the sleeve which has a shoulder-like widening, by means of which the damping element can be brought to the necessary pretension, is particularly advantageous.
- Another advantage is that both the sleeve and the damping element are simple and very precise to manufacture and malfunctions of the fuel injector are avoided.
- through-openings are provided in the sleeve, which allow the fuel to flow unhindered through the sleeve to the sealing seat.
- a damping element with a rectangular cross section, for example as a hose section.
- FIG. 1 shows a schematic section through a first exemplary embodiment of a fuel injection valve according to the invention
- FIG. 2 shows a schematic section from the first exemplary embodiment of a fuel injector according to the invention shown in FIG. 1 in area II in FIG. 1,
- FIG. 3 shows a schematic section in the same area as in FIG. 2 from a second exemplary embodiment of a fuel injector according to the invention
- Fig. 4 is a schematic plan view in the flow direction on the sleeve of the second embodiment shown in Fig. 3 of a fuel injector according to the invention.
- a fuel injector 1 shown in FIG. 1 is in the form of a fuel injector 1 for fuel injection systems of mixture-compressing, spark-ignited internal combustion engines.
- 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 arranged.
- the valve needle 3 is operatively connected to a valve closing body 4, which with one on a Valve seat body 5 arranged valve seat surface 6 cooperates to form a sealing seat.
- fuel injector 1 is a fuel injector 1 that opens inward and has a spray opening 7.
- the nozzle body 2 is sealed by a seal 8 against the outer pole 9 of a magnet coil 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 constriction 26 and connected to one another by a non-ferromagnetic 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 disc 15 is used for stroke adjustment.
- An armature 20 is located on the other side of the adjusting disc 15. This armature is non-positively connected to the valve needle 3 via a flange 21, which is connected to the flange 21 by a weld seam 22.
- a restoring spring 23 is supported on the flange 21 and, in the present design of the fuel injector 1, is preloaded by a sleeve 24.
- Fuel channels 30a to 30c run in the valve needle guide 14, in the armature 20 and on the valve seat body 5, which channels the fuel, which is supplied via a central fuel supply 16 ' and filtered by a filter element 25, to the spray opening 7.
- the fuel injector 1 is sealed by a seal 28 against a fuel line, not shown.
- a damping element 32 designed as an O-ring, which consists of an elastomer material, arranged. It rests on a ' shoulder-like widening 36 of a preferably deep-drawn sleeve 31, which is non-positively connected to the valve needle 3 via a weld seam 33.
- the flange 21 is welded to the valve needle 3
- the armature 20 and the damping element 32 are plugged on, and then the sleeve 31 is pressed under pressure on the damping element 32 and also with the valve needle 3 welded.
- the armature 20 has only a strongly damped play and has only a slight tendency to twist between the flange 21 and the damping element 32.
- the armature 20 In the idle state of the fuel injection valve 1, the armature 20 is acted upon by the return spring 23 against its stroke direction in such a way that the valve closing body 4 is held in sealing contact with the valve seat 6.
- the magnetic coil 10 When the magnetic coil 10 is excited, it builds up a magnetic field which moves the armature 20 against the spring force of the return spring 23 in the stroke direction, the stroke being predetermined by a working gap 27 which is in the rest position between the inner pole 12 and the armature 20.
- the armature 20 also carries the flange 21, which is welded to the valve needle 3, in the lifting direction.
- the valve closing body 4 connected to the valve needle 3 lifts off the valve seat surface 6 and the fuel is sprayed through the spray opening 7.
- the armature '20 drops from the inner pole 13 after the magnetic field has been sufficiently reduced by the pressure of the return spring 23, as a result of which the flange 21 which is connected to the valve needle 3 moves in the opposite direction of the stroke direction.
- the valve needle 3 is thereby in die. same direction moves, whereby the valve closing body 4 touches the valve seat 6 and the fuel injector 1 is closed.
- FIG. 2 shows an enlarged sectional view of an enlarged view of area II in FIG. 1.
- valve needle 3 A part of the valve needle 3 is shown, the flange 21 welded to it, the sleeve 31 and the damping element 32 designed according to the invention and inserted into the recess 35 of the armature 20.
- flange 21 is first welded to valve needle 3 via weld 22 , 22.
- the damping element 32 is inserted into the recess 35 formed in the downstream end face 34 of the armature 20.
- the armature 20 with the inserted damping element 32 is placed on the valve needle 3.
- the sleeve 31 which can preferably be produced by deep drawing, and which preferably has punched through-openings 37 for the fuel line, is pushed onto the valve needle 3 and pressed onto the damping element 32 with a shoulder-like widening 36.
- the sleeve 31 is also connected to the valve needle via a weld seam 33 in this way under tension.
- the damping element provides 32 while opening for an almost instantaneous opening movement, 'since the armature 20, the sleeve 31 entrains instantaneously when tightening in the magnetic field of the magnetic coil 10 via the prestressed damping element 32nd
- the prestressing of the damping element 32 ensures, after the fuel injector 1 has closed, that bumpers of the armature 20 are absorbed on an armature stop surface formed by the sleeve 31 without the fuel injector 1 opening again undesirably.
- the axial position of the sleeve 31 is to be selected so that a gap 38 is present between the armature 20 and the sleeve 31, which allows the armature 20 to deflect slightly.
- the damping element 32 is, for. B. designed as an ' O-ring.
- damping elements 32 are easier to handle and install than damping membranes, for example, and also have advantages in manufacture. Membranes often have cracks, burrs or unclean cut edges and, moreover, often tend to swell out from the side and subsequent malfunctions during operation of the fuel injector 1.
- the O-ring-shaped damping element 32 is chambered and can therefore not be deformed even when swollen.
- the attachment of the damping element 32 in the recess 35 in the downstream end face 34 of the armature 20 can also prevent rotation of the armature 20 and resulting stroke changes due to the prestressed assembly.
- the endurance behavior of the fuel injector 1 is influenced positively.
- the damping element 32 is designed as a shaped ring which is adapted to the geometry of the recess 35 in the downstream end face 34 of the armature 20.
- the shoulder-like widening 36 of the sleeve 31 can lie better against the damping element 32, as a result of which the positive engagement is improved and the damping behavior of the fuel injection valve 1 can be influenced in a targeted manner.
- the damping element 32 can also be produced as a molded part with a rectangular cross section, for example in the form of a hose section. This form is particularly simple and inexpensive to implement.
- Fig. 4 shows a _ schematic plan view in the flow direction, to the sleeve '31 of the invention designed according to the fuel injection valve 1 of FIG. 2 or FIG. 3.
- the shoulder-like widening 36 of the sleeve 31 can be recessed several times, as indicated by the hatched areas 39.
- the damping behavior can also be influenced in a targeted manner by this measure, for example by the depth and the number of recessed sections.
- a contact surface of the damping element 32 can also have recessed areas and lie on a flat contact surface of the sleeve.
- the invention is not limited to the illustrated embodiment and z. B. also suitable for outward opening fuel injection valves 1 or other anchor shapes, for example flat anchors.
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 |
---|---|---|---|
DE10118162 | 2001-04-11 | ||
DE10118162A DE10118162B9 (en) | 2001-04-11 | 2001-04-11 | Fuel injector |
PCT/DE2002/001290 WO2002084102A1 (en) | 2001-04-11 | 2002-04-09 | Fuel injection valve comprising a damping element between the armature and the valve needle |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1387941A1 true EP1387941A1 (en) | 2004-02-11 |
EP1387941B1 EP1387941B1 (en) | 2005-07-13 |
Family
ID=7681274
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP02732382A Expired - Lifetime EP1387941B1 (en) | 2001-04-11 | 2002-04-09 | Fuel injection valve comprising a damping element between the armature and the valve needle |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP1387941B1 (en) |
JP (1) | JP4210523B2 (en) |
CZ (1) | CZ20023957A3 (en) |
DE (2) | DE10118162B9 (en) |
WO (1) | WO2002084102A1 (en) |
Families Citing this family (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10208224A1 (en) * | 2002-02-26 | 2003-09-11 | Bosch Gmbh Robert | Fuel injector |
DE10345967B4 (en) * | 2003-10-02 | 2014-02-27 | Robert Bosch Gmbh | Fuel injector |
DE102004024533A1 (en) | 2004-05-18 | 2005-12-15 | Robert Bosch Gmbh | Fuel injector |
JP2006017101A (en) | 2004-06-02 | 2006-01-19 | Denso Corp | Fuel injection valve |
CN100389258C (en) * | 2004-06-02 | 2008-05-21 | 株式会社电装 | Fuel injection valve |
DE102005030957B4 (en) | 2005-06-30 | 2024-01-18 | Robert Bosch Gmbh | Device for damping the armature stroke in solenoid valves |
EP2166220B1 (en) | 2008-09-19 | 2012-02-29 | Continental Automotive GmbH | Injection valve |
CN102671795A (en) * | 2011-03-07 | 2012-09-19 | 傅伟淇 | Water wax sprayer |
JP5965253B2 (en) | 2012-02-20 | 2016-08-03 | 株式会社デンソー | Fuel injection valve |
DE202013012805U1 (en) * | 2012-05-08 | 2019-11-14 | Cpt Group Gmbh | Valve arrangement for an injection valve and injection valve |
DE102013206600B4 (en) | 2013-04-12 | 2015-08-06 | Continental Automotive Gmbh | Injection system for injecting fuel into an internal combustion engine and control method for such an injection system |
DE102013207555B3 (en) | 2013-04-25 | 2014-10-09 | Continental Automotive Gmbh | Method for injection quantity adaptation |
EP2796703B1 (en) * | 2013-04-26 | 2016-07-20 | Continental Automotive GmbH | Valve assembly for an injection valve and injection valve |
EP3009663B1 (en) | 2014-10-15 | 2020-06-24 | Vitesco Technologies GmbH | Valve assembly and fluid injector |
DE102015226181A1 (en) * | 2015-12-21 | 2017-06-22 | Robert Bosch Gmbh | Valve for metering a fluid |
DE102016218515A1 (en) * | 2016-09-27 | 2018-03-29 | Robert Bosch Gmbh | Method for controlling switchable valves, in particular injection valves of an internal combustion engine of a motor vehicle |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4766405A (en) * | 1987-04-14 | 1988-08-23 | Allied Corporation | Dynamic energy absorber |
US4978074A (en) * | 1989-06-21 | 1990-12-18 | General Motors Corporation | Solenoid actuated valve assembly |
US5299776A (en) * | 1993-03-26 | 1994-04-05 | Siemens Automotive L.P. | Impact dampened armature and needle valve assembly |
DE19849210A1 (en) * | 1998-10-26 | 2000-04-27 | Bosch Gmbh Robert | Fuel injection valve for internal combustion engine fuel injection system has armature movable between two stops, damping spring arranged between second stop and armature |
DE19927900A1 (en) * | 1999-06-18 | 2000-12-21 | Bosch Gmbh Robert | Fuel injection valve for direct injection IC engine has movement of armature limited by opposing stops attached to valve needle one of which is provided by spring element |
DE19950761A1 (en) * | 1999-10-21 | 2001-04-26 | Bosch Gmbh Robert | Fuel injection valve has supporting ring between elastomeric ring and armature that supports elastomeric ring axially near opening of fuel channel in armature and radially on shoulder |
-
2001
- 2001-04-11 DE DE10118162A patent/DE10118162B9/en not_active Expired - Fee Related
-
2002
- 2002-04-09 DE DE50203624T patent/DE50203624D1/en not_active Expired - Lifetime
- 2002-04-09 WO PCT/DE2002/001290 patent/WO2002084102A1/en not_active Application Discontinuation
- 2002-04-09 JP JP2002581821A patent/JP4210523B2/en not_active Expired - Fee Related
- 2002-04-09 EP EP02732382A patent/EP1387941B1/en not_active Expired - Lifetime
- 2002-04-09 CZ CZ20023957A patent/CZ20023957A3/en unknown
Non-Patent Citations (1)
Title |
---|
See references of WO02084102A1 * |
Also Published As
Publication number | Publication date |
---|---|
DE50203624D1 (en) | 2005-08-18 |
JP4210523B2 (en) | 2009-01-21 |
DE10118162B9 (en) | 2004-09-09 |
CZ20023957A3 (en) | 2004-07-14 |
JP2004518902A (en) | 2004-06-24 |
DE10118162C2 (en) | 2003-04-24 |
DE10118162A1 (en) | 2002-10-24 |
EP1387941B1 (en) | 2005-07-13 |
WO2002084102A1 (en) | 2002-10-24 |
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