EP2925998A1 - Einspritzventil - Google Patents
EinspritzventilInfo
- Publication number
- EP2925998A1 EP2925998A1 EP13773678.1A EP13773678A EP2925998A1 EP 2925998 A1 EP2925998 A1 EP 2925998A1 EP 13773678 A EP13773678 A EP 13773678A EP 2925998 A1 EP2925998 A1 EP 2925998A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- opening
- spray
- injection valve
- edge
- 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
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
- F02M61/04—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
-
- 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
- F02M61/1833—Discharge orifices having changing cross sections, e.g. being divergent
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
- B05B1/02—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to produce a jet, spray, or other discharge of particular shape or nature, e.g. in single drops, or having an outlet of particular shape
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
- B05B1/28—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means with integral means for shielding the discharged liquid or other fluent material, e.g. to limit area of spray; with integral means for catching drips or collecting surplus liquid or other fluent material
-
- 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
-
- 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
- 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
-
- 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
- F02M61/1826—Discharge orifices having different sizes
-
- 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
- F02M61/1853—Orifice plates
Definitions
- the invention is based on an injection valve of the type of
- a fuel injection valve which has a perforated disc downstream of its valve seat surface, with which a valve closing body for opening and closing the valve cooperates.
- This shaped from a sheet, cup-shaped perforated disc has a variety of
- Spray orifices through which the fuel is discharged, for example in a suction pipe of an internal combustion engine in the direction of an intake valve. These spray orifices are introduced by punching, eroding or laser drilling in the perforated disc.
- the spray openings have a constant circular or elliptical cross section throughout their axial length.
- a fuel injection valve which has a fuel inlet, an excitable actuator through which a valve closing member is movable, formed on a valve seat member fixed valve seat, with which the valve closing member for opening and closing the Valve cooperates, and at least one provided downstream of the valve seat outlet opening as a fuel outlet.
- the at least one outlet opening has at its discharge-side end an exit region, in the form and / or size and / or contour of the remaining embodiment of
- Discharge opening deviates, wherein the outlet region of the outlet opening convex or concave, conically widening or diverging, multi-stepped o.ä. is executed.
- the injection valve according to the invention with the features of the main claim has the advantage that a spray can be generated in a cost effective manner per spray orifice, which provides a very good atomization quality with respect to its lamellar decay and in particular a defined demolition of the flow is still achieved within the spray orifice, in an advantageous Way the coking tendency in the injection opening effectively reduced.
- the liquid to be sprayed off is more defined and more effectively torn off by the trailing edge formed in the transition of the at least two opening sections of the ejection opening than is the case with known stepped ejection openings.
- FIG. 2 shows an enlarged detail of that shown in FIG
- Figure 3 shows a second embodiment of an inventively designed
- Figure 4 shows a third embodiment of an inventively designed
- the fuel injection valve 1 shown in Figure 1 is in the form of a fuel injection valve 1 for fuel injection systems of
- the fuel injection valve 1 is particularly suitable for direct injection of Fuel in a combustion chamber, not shown, of an internal combustion engine.
- inventive design of a spray hole only by way of example with reference to such
- Fuel injection valve 1 is described, however, the invention also to fuel injection valves for port injection, on
- Fuel injection valves of self-igniting internal combustion engines or to injection valves for introducing aqueous urea solutions e.g.
- AdBlue TM into the exhaust system of internal combustion engines or similar. can be implemented.
- the fuel injection valve 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 cooperates with a valve seat body 6 arranged on a valve seat body 5 to form a sealing seat.
- Fuel injection valve 1 is in the exemplary embodiment to an inwardly opening fuel injection valve 1, which via at least one
- the nozzle body 2 is sealed by a seal 8 against an outer pole 9 of a magnetic coil 10.
- the magnetic coil 10 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.
- Inner pole 13 and the outer pole 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 on
- Inner pole 13 may be molded. Instead of an electromagnetic actuator may also be a piezoelectric, magnetostrictive or other drive for actuating the valve closing body 4 are used.
- the valve needle 3 is guided in a valve needle guide 14, which is designed disk-shaped.
- For stroke adjustment is a paired dial 15.
- armature 20 Upstream of the dial 15 is an armature 20. This is a non-positively connected via a first flange 21 with the valve needle 3 in connection, which is connected by a weld 22 with the first flange 21. On 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.
- Guide element 36 extend fuel channels 30, 31 and 32.
- the fuel is supplied via a central fuel supply 16 and filtered by a filter element 25.
- the fuel injection valve 1 is connected by a seal 28 against a fuel distributor line, not shown, and by another
- Damping element 33 which consists of an elastomeric material arranged. It rests on a second flange 34, which has a
- Weld 35 is non-positively connected to the valve needle 3.
- Vorhubfeder 38 is arranged, which holds the armature 20 in the resting state of the fuel injection valve 1 in abutment against the second flange 34.
- the spring constant of the Vorhubfeder 38 is substantially smaller than the spring constant of the return spring 23rd In the idle state of the fuel injection valve 1, the armature 20 is acted upon by the return spring 23 and the Vorhubfeder 38 against its stroke direction so that the valve closing body 4 on the valve seat surface 6 in
- Fuel channels 30 to 32 guided fuel is sprayed through the spray opening 7.
- 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.
- the Vorhubfeder 38 then acts on the armature 20 again so that it does not rebound from the second flange 34, but returns to the rest state without Anschlagspreller.
- FIG. 2 shows, in an excerptional axial sectional representation, the detail designated by II in FIG. 1, a first exemplary embodiment of the ejection opening 7 according to the invention.
- the ejection opening 7 is characterized in that it consists of two successive ejection opening sections 7 ', 7 ". is formed, wherein seen in the flow direction according to arrow 40, the first Abspritzö Maschinensabites 7 'a smaller opening width, in particular in a cylindrical embodiment of Abspritzö Stammsab hurdlee 7', 7 “has a smaller diameter than the opening width and the diameter of the second Abspritzö Stammsabites 7".
- Set valve seat body 5 targeted.
- the best possible way is to ensure that a constant flow rate can be sprayed off via the spray-discharge openings 7 over the entire service life of the fuel injection valve 1. It has been found that, in particular in the case of stepped injection openings 7, which have an opening width enlargement in the downstream direction, the tendency to form deposits, coking and thus the risk of clogging of the free cross section of the ejection openings 7 are considerably reduced.
- a tear-off edge 41 is formed, which is characterized in that it depends on the material of the valve seat body 5, the
- Nozzle body or a spray perforated disk with an angle of ⁇ 90 ° is formed circumferentially in this area.
- FIG. 2 shows an embodiment of the ejection opening 7, in which, starting from the tear-off edge 41, the bottom area 42 receding radially outward extends obliquely and flat, so that the lowest lying annular area in the outer wall area of the second
- FIG. 3 shows a second exemplary embodiment of a spray-discharge opening 7 in a valve-seat body 5 in a sectional view comparable to FIG. The only significant difference from that shown in FIG.
- Embodiment consists in that, starting from the tear-off edge 41, the base region 42, which is set back in a radially outward direction, runs concavely, whereby here, too, e.g. the deepest lying annular region in the outer wall region of the second Abspritzö Stammsabiteses 7 "of the ejection opening 7 is located.
- the bottom area 42 is roof-shaped. Starting from the tear-off edge 41 extends the radially outward recessed running
- the contours according to the invention are produced inexpensively by means of U KP laser drilling (ultra short pulse laser drilling).
- the invention is not limited to the illustrated embodiments and z. B. for differently arranged spray openings 7 and for any construction of inwardly opening multi-hole fuel injectors 1 applicable.
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102012221713.4A DE102012221713A1 (de) | 2012-11-28 | 2012-11-28 | Einspritzventil |
PCT/EP2013/070405 WO2014082774A1 (de) | 2012-11-28 | 2013-10-01 | Einspritzventil |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2925998A1 true EP2925998A1 (de) | 2015-10-07 |
EP2925998B1 EP2925998B1 (de) | 2016-09-14 |
Family
ID=49304926
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP13773678.1A Active EP2925998B1 (de) | 2012-11-28 | 2013-10-01 | Einspritzventil |
Country Status (5)
Country | Link |
---|---|
US (1) | US9506437B2 (de) |
EP (1) | EP2925998B1 (de) |
KR (1) | KR102112492B1 (de) |
DE (1) | DE102012221713A1 (de) |
WO (1) | WO2014082774A1 (de) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2015224618A (ja) * | 2014-05-29 | 2015-12-14 | トヨタ自動車株式会社 | 燃料噴射弁 |
JP5969564B2 (ja) * | 2014-10-01 | 2016-08-17 | トヨタ自動車株式会社 | 燃料噴射弁 |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR415512A (fr) | 1910-05-04 | 1910-09-28 | Ets Delaunay Belleville Sa | Pulvérisateur de mazout ou de tout autre combustible liquide pour le chauffage des chaudières |
JP2849063B2 (ja) * | 1996-02-14 | 1999-01-20 | 株式会社共立合金製作所 | 流体噴出ノズル |
DE19636396B4 (de) | 1996-09-07 | 2005-03-10 | Bosch Gmbh Robert | Brennstoffeinspritzventil |
JP3323429B2 (ja) | 1997-11-19 | 2002-09-09 | トヨタ自動車株式会社 | 内燃機関用燃料噴射弁 |
DE19937961A1 (de) | 1999-08-11 | 2001-02-15 | Bosch Gmbh Robert | Brennstoffeinspritzventil und Verfahren zur Herstellung von Austrittsöffnungen an Ventilen |
DE10307931A1 (de) * | 2003-02-25 | 2004-10-28 | Robert Bosch Gmbh | Brennstoffeinspritzventil |
DE10325289A1 (de) | 2003-06-04 | 2005-03-17 | Robert Bosch Gmbh | Brennstoffeinspritzventil |
JP2007177766A (ja) * | 2005-12-28 | 2007-07-12 | Toyota Motor Corp | 燃料噴射装置 |
DE102006051327A1 (de) | 2006-10-31 | 2008-05-08 | Robert Bosch Gmbh | Brennstoffeinspritzventil |
JP4610631B2 (ja) * | 2008-05-01 | 2011-01-12 | 三菱電機株式会社 | 燃料噴射弁 |
-
2012
- 2012-11-28 DE DE102012221713.4A patent/DE102012221713A1/de not_active Withdrawn
-
2013
- 2013-10-01 WO PCT/EP2013/070405 patent/WO2014082774A1/de active Application Filing
- 2013-10-01 KR KR1020157013916A patent/KR102112492B1/ko active IP Right Grant
- 2013-10-01 US US14/443,239 patent/US9506437B2/en active Active
- 2013-10-01 EP EP13773678.1A patent/EP2925998B1/de active Active
Non-Patent Citations (1)
Title |
---|
See references of WO2014082774A1 * |
Also Published As
Publication number | Publication date |
---|---|
DE102012221713A1 (de) | 2014-05-28 |
WO2014082774A1 (de) | 2014-06-05 |
US9506437B2 (en) | 2016-11-29 |
KR20150088260A (ko) | 2015-07-31 |
US20150300304A1 (en) | 2015-10-22 |
EP2925998B1 (de) | 2016-09-14 |
KR102112492B1 (ko) | 2020-05-19 |
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