EP1598550A1 - Brennstoffeinspritzventil - Google Patents
Brennstoffeinspritzventil Download PDFInfo
- Publication number
- EP1598550A1 EP1598550A1 EP05101367A EP05101367A EP1598550A1 EP 1598550 A1 EP1598550 A1 EP 1598550A1 EP 05101367 A EP05101367 A EP 05101367A EP 05101367 A EP05101367 A EP 05101367A EP 1598550 A1 EP1598550 A1 EP 1598550A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- fuel
- fuel injection
- injection valve
- valve
- valve according
- 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
Images
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
- F02M61/18—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
- 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
- F02M61/16—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
- F02M61/1873—Valve seats or member ends having circumferential grooves or ridges, e.g. toroidal
-
- 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 injection valve according to the preamble of the main claim.
- a Fuel injection valve with a valve needle an am ejection-side end of the valve needle trained Valve-closing body and a valve seat body known. in the Valve seat body are formed spray openings. Between the valve closing body and the valve seat body is on with the fuel injector open Fuel channel formed, which via junctions in branches off several spray openings. The injection openings open sharp-edged into the fuel channel.
- a disadvantage of the above-mentioned document known fuel injection valve is in particular that through the sharp-edged junctions from the fuel channel too the injection openings it to a very sudden and strong flow deflection comes to those unwanted Flow effects leads. In particular, it happens Flow instabilities and cavitating vertebrae leading to Cavitation damage and the penetration and lead Propagation behavior of the fuel spray sustainable change unfavorably and unpredictably.
- the fuel injection valve according to the invention with the characterizing features of the main claim has In contrast, the advantage that flow instabilities in discharge-side region of the fuel injection valve be reduced and improves the cavitation becomes. Due to the reduced cavitation tendency of the guided Fuel is the life and reliability of the Fuel injector increased. By the simultaneous Reduction of flow instabilities will be added as well Fluctuations in homogeneity, flow and Penetration and propagation behavior of the fuel spray reduced. The fuel spray is total in the combustion chamber be more evenly distributed and pollutant emissions reduced. In addition, pressure fluctuations on the Valve needle avoided and thus the dynamic behavior of Fuel injector improved, so-called. Bag jets at the exit of the spray openings avoided become.
- the deflection of the deflecting element Curved rounded and the fuel is at it deflected curvilinear. This makes it possible for the Flow instabilities and the cavitation tendency of the Fuel to further reduce.
- the deflection on the To arrange valve closing body when the deflecting the Valve closing body comprises annular. That's it possible, the fuel injector particularly simple build.
- the deflection in the To perform the form of a nose can thereby particularly low in cavitation and flow stable deflected become.
- valve seat body is on the inflow side in Area of the confluence to the confluence curve rounded. Cavitation tendency and flow instabilities can thereby further reduce. This is done by a sharp tear-off edge at the downstream end of the deflection surface also favored on the valve closing body.
- FIG. 1 An illustrated in Fig. 1 generic Fuel injection valve 1 is in the form of a Fuel injection valve 1 for fuel injection systems of mixture-compacting, externally ignited Internal combustion engine running.
- the Fuel injector 1 is particularly suitable for direct injection of fuel into one illustrated combustion chamber of an internal combustion engine.
- the fuel injection valve 1 consists of a Nozzle body 2, in which a valve needle 3 is arranged.
- the valve needle 3 has a discharge side Valve-closing body 4, which with one on one Valve seat body 5 arranged valve seat surface 6 to a Tight fit together.
- the fuel injection valve 1 is it in the exemplary embodiment to an inward opening fuel injection valve 1, which via a Spray opening 7 has.
- the nozzle body 2 is by a seal 8 against a Outer pole 9 of a magnetic coil 10 sealed.
- the magnetic coil 10 is encapsulated in a coil housing 11 and on a Coil wound 12, which at an inner pole 13 of Magnetic coil 10 is applied.
- the inner pole 13 and the outer pole 9 are separated by a distance 26 and together by a non-ferromagnetic Connecting member 29 connected.
- the solenoid 10 is via an electrical line 19 from one via a electrical plug-in contact 17 can be supplied with electric current excited.
- the plug contact 17 is of a Plastic casing 18 surrounded, the inner pole 13th can be injected.
- the valve needle 3 is in a valve needle guide fourteenth guided, which is designed disk-shaped. to Stroke adjustment is a paired shim 15. An the other side of the dial 15 is the Anchor 20. This is about a first flange 21 with the Valve needle 3 in conjunction, which by a weld 22 is connected to the first flange 21. On the first Flange 21 is supported by a helical return spring 23 which in the present design of the Fuel injection valve 1 by a sleeve 24 Bias is brought.
- the armature 20 and a Guide element 36 extend fuel channels 30, 31 and 32nd
- the fuel is via a central fuel supply 16 supplied and filtered by a filter element 25.
- the Fuel injection valve 1 is through a sealing ring 28th against a not shown Fuel distribution line and by a seal 37 against sealed a cylinder head, not shown.
- annular damping element 33 On the discharge side of the armature 20 is a annular damping element 33, which consists of a Elastomer material consists, arranged. It lies on one second flange 34, which via a weld 35th cohesively connected to the valve needle 3.
- the armature 20 drops sufficient reduction of the magnetic field by the pressure of the Return spring 23 from the inner pole 13, causing the with the valve needle 3 in communication first flange 21st moved against the stroke direction.
- the valve needle 3 is thereby moved in the same direction, causing the Valve closing body 4 touches on the valve seat surface 6 and the fuel injection valve 1 is closed.
- Fig. 2 shows a schematic section through the Embodiment of an inventive Fuel injection valve 1 in the region of the sealing seat at opened fuel injection valve 1, wherein the Valve-closing body 4 lifted from the valve seat surface 6 is.
- the fuel injection valve 1 opens inward.
- Between the valve closing body 4 and the valve seat body 5 thereby opens a trained as an annular channel Fuel supply 38, which around the valve closing body. 4 runs around and when opening the sealing seat increased.
- the fuel supply 38 leads the illustrated Spray opening 7 fuel to, where in others Embodiments of a plurality of ejection openings. 7 Fuel can be supplied in this way.
- the roughly branch off at right angles from the fuel supply 38 Spray opening 7 has a junction 39 to Fuel supply 38 towards.
- the injection opening 7 can in other embodiments, in an angle, the is greater than 90 °, from the fuel supply 38th branch.
- the fuel supply 38 leads in the further Course past the junction 39 and is downstream for example, with other spray openings 7 or Junctions 39 in conjunction.
- a deflecting element 40 is arranged in the region of the junction 39 in the valve closing body 4 .
- the deflecting element 40 is formed integrally with the valve closing body 4 and rotates in this embodiment, the Valve-closing body 4 uninterrupted.
- the deflecting element 40 has the shape of a nose 41 in cross section.
- the deflecting element 40 or nose 41 On the inflow side, the deflecting element 40 or nose 41 a curved rounded deflection surface 42, whose imagined downstream tangential extension to the Junction 39 is directed, advantageously at opened valve on the lower, discharge side edge of the Junction 39.
- the deflection surface 42 describes a curve, the fuel from the direction of the fuel supply 38 in the direction of the longitudinal axis of the inflow-side part the ejection opening 7 at least partially deflects.
- the deflecting element 40 has in this embodiment one arranged at the downstream end of the deflection surface 42 sharp trained stall edge 43.
- Both the stall edge 43 and the Deflection element 40 itself are at the height of the imaginary Extension of the longitudinal axis of the inflow end of the Spray opening 7 with the fuel injection valve open 1.
- valve seat body 5 in the region of Junction 39 curved towards the junction 39 rounded off. This allows the fuel flow in this area over a larger area run laminar and does not crack at the transition from the fuel supply 38 in the Spray opening 7 from.
- Fig. 3 shows a schematic section through the Embodiment of the invention Fuel injection valve 1 in the region of the sealing seat at closed fuel injection valve 1, wherein the Valve closing body 4 on the valve seat surface 6 sealing rests.
- the trained as a nose 41 in cross section Deflection element 40 engages in the fuel supply 38th downstream of the junction 39 arranged recess 44th one.
- the invention is not limited to those shown Embodiments limited and, for example, for Fuel injection valves of self-igniting Internal combustion engines or outward opening Fuel injectors usable.
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
- Fig. 1
- einen schematischen Schnitt durch ein gattungsgemäß ausgestaltetes Brennstoffeinspritzventil,
- Fig. 2
- einen schematischen Schnitt durch das Ausführungsbeispiel eines erfindungsgemäßen Brennstoffeinspritzventils im Bereich des Dichtsitzes bei geöffnetem Brennstoffeinspritzventil und
- Fig. 3
- einen schematischen Schnitt durch das Ausführungsbeispiel eines erfindungsgemäßen Brennstoffeinspritzventils im Bereich des Dichtsitzes bei geschlossenem Brennstoffeinspritzventil.
Claims (11)
- Brennstoffeinspritzventil (1) mit einem Aktor, einer mit dem Aktor in Wirkverbindung stehenden Ventilnadel (3), welche abspritzseitig einen Ventilschließkörper (4) aufweist, der mit einer Ventilsitzfläche (6) zu einem Dichtsitz zusammenwirkt, wenigstens einer in einem Ventilsitzkörper (5) vorgesehenen Abspritzöffnung (7) und einer zwischen dem Ventilschließkörper (4) und dem Ventilsitzkörper (5) verlaufenden Brennstoffzuführung (38), aus der die Abspritzöffnung (7) mit einer Einmündung (39) beginnt,
dadurch gekennzeichnet, daß im Bereich der Einmündung (39) zumindest ein Umlenkelement (40), das eine Umlenkfläche (42) aufweist, angeordnet ist, durch das der durch die Brennstoffzuführung (38) strömende Brennstoff in Richtung der Einmündung (39) umgelenkt wird. - Brennstoffeinspritzventil nach Anspruch 1,
dadurch gekennzeichnet, daß die Umlenkfläche (42), an welcher der Brennstoff umgelenkt wird, kurvenförmig abgerundet ist und der Brennstoff somit kurvenförmig umgelenkt wird. - Brennstoffeinspritzventil nach Anspruch 1 oder 2,
dadurch gekennzeichnet, daß die gedachte Verlängerung des abströmseitigen Endes der Umlenkfläche (42) bei geöffnetem Dichtsitz auf die Einmündung (39) gerichtet ist. - Brennstoffeinspritzventil nach einem der vorangegangenen Ansprüche,
dadurch gekennzeichnet, daß das zumindest eine Umlenkelement (40) am Ventilschließkörper (4) angeordnet ist. - Brennstoffeinspritzventil nach Anspruch 4,
dadurch gekennzeichnet, daß das zumindest eine Umlenkelement (40) den Ventilschließkörper (4) ringförmig umläuft. - Brennstoffeinspritzventil nach einem der vorangegangenen Ansprüche,
dadurch gekennzeichnet, daß das Umlenkelement (40) im Querschnitt die Form einer Nase (41) aufweist. - Brennstoffeinspritzventil nach einem der vorangegangenen Ansprüche,
dadurch gekennzeichnet, daß bei geöffnetem Dichtsitz das zumindest eine Umlenkelement (40) auf Höhe der gedachten Verlängerung der Längsachse des zuströmseitigen Endes der Abspritzöffnung (7) liegt. - Brennstoffeinspritzventil nach einem der vorangegangenen Ansprüche,
dadurch gekennzeichnet, daß der Ventilsitzkörper (5) zuströmseitig im Bereich der Einmündung (39) zur Einmündung (39) hin kurvenförmig abgerundet ist. - Brennstoffeinspritzventil nach einem der vorangegangenen Ansprüche,
dadurch gekennzeichnet, daß die Umlenkfläche (42) am abströmseitigen Ende eine scharfe Strömungsabrisskante (43) aufweist. - Brennstoffeinspritzventil nach Anspruch 9,
dadurch gekennzeichnet, daß bei geöffnetem Dichtsitz die Strömungsabrisskante (43) auf Höhe der gedachten Verlängerung der Längsachse des zuströmseitigen Endes der Abspritzöffnung (7) liegt. - Brennstoffeinspritzventil nach einem der vorangegangenen Ansprüche,
dadurch gekennzeichnet, daß das Umlenkelement (40) bei geschlossenem Dichtsitz stromabwärtig der Einmündung (39) in eine Ausnehmung (44) eingreift.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE200410024534 DE102004024534A1 (de) | 2004-05-18 | 2004-05-18 | Brennstoffeinspritzventil |
DE102004024534 | 2004-05-18 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1598550A1 true EP1598550A1 (de) | 2005-11-23 |
EP1598550B1 EP1598550B1 (de) | 2007-08-22 |
Family
ID=34938797
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP20050101367 Not-in-force EP1598550B1 (de) | 2004-05-18 | 2005-02-23 | Brennstoffeinspritzventil |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP1598550B1 (de) |
DE (2) | DE102004024534A1 (de) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2006128756A1 (de) * | 2005-06-01 | 2006-12-07 | Robert Bosch Gmbh | Kraftstoffeinspritzventll für brennkraftmaschinen |
WO2018033460A1 (de) * | 2016-08-19 | 2018-02-22 | Robert Bosch Gmbh | Kraftstoffeinspritzdüse |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3810467A1 (de) * | 1988-03-26 | 1989-10-12 | Daimler Benz Ag | Kraftstoffeinspritzduese fuer eine luftverdichtende direkteinspritzende brennkraftmaschine |
US6382533B1 (en) * | 1999-02-24 | 2002-05-07 | Robert Bosch Gmbh | Fuel injection valve |
WO2003031807A1 (de) * | 2001-10-05 | 2003-04-17 | Siemens Aktiengesellschaft | Kraftstoffeinspritzventil |
-
2004
- 2004-05-18 DE DE200410024534 patent/DE102004024534A1/de not_active Withdrawn
-
2005
- 2005-02-23 EP EP20050101367 patent/EP1598550B1/de not_active Not-in-force
- 2005-02-23 DE DE200550001272 patent/DE502005001272D1/de not_active Expired - Fee Related
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3810467A1 (de) * | 1988-03-26 | 1989-10-12 | Daimler Benz Ag | Kraftstoffeinspritzduese fuer eine luftverdichtende direkteinspritzende brennkraftmaschine |
US6382533B1 (en) * | 1999-02-24 | 2002-05-07 | Robert Bosch Gmbh | Fuel injection valve |
WO2003031807A1 (de) * | 2001-10-05 | 2003-04-17 | Siemens Aktiengesellschaft | Kraftstoffeinspritzventil |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2006128756A1 (de) * | 2005-06-01 | 2006-12-07 | Robert Bosch Gmbh | Kraftstoffeinspritzventll für brennkraftmaschinen |
US8720802B2 (en) | 2005-06-01 | 2014-05-13 | Robert Bosch Gmbh | Fuel injection valve for internal combustion engines |
WO2018033460A1 (de) * | 2016-08-19 | 2018-02-22 | Robert Bosch Gmbh | Kraftstoffeinspritzdüse |
CN109642534A (zh) * | 2016-08-19 | 2019-04-16 | 罗伯特·博世有限公司 | 燃料喷射喷嘴 |
US11041471B2 (en) | 2016-08-19 | 2021-06-22 | Robert Bosch Gmbh | Fuel injection nozzle |
CN109642534B (zh) * | 2016-08-19 | 2021-11-05 | 罗伯特·博世有限公司 | 燃料喷射喷嘴 |
Also Published As
Publication number | Publication date |
---|---|
DE502005001272D1 (de) | 2007-10-04 |
EP1598550B1 (de) | 2007-08-22 |
DE102004024534A1 (de) | 2005-12-15 |
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