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EP1402176A1 - Fuel-injection valve - Google Patents

Fuel-injection valve

Info

Publication number
EP1402176A1
EP1402176A1 EP02742710A EP02742710A EP1402176A1 EP 1402176 A1 EP1402176 A1 EP 1402176A1 EP 02742710 A EP02742710 A EP 02742710A EP 02742710 A EP02742710 A EP 02742710A EP 1402176 A1 EP1402176 A1 EP 1402176A1
Authority
EP
European Patent Office
Prior art keywords
fuel injection
injection valve
fuel
valve
valve seat
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
Application number
EP02742710A
Other languages
German (de)
French (fr)
Other versions
EP1402176B1 (en
Inventor
Günter DANTES
Detlef Nowak
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP1402176A1 publication Critical patent/EP1402176A1/en
Application granted granted Critical
Publication of EP1402176B1 publication Critical patent/EP1402176B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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
    • F02M61/18—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for
    • F02M61/188—Spherical or partly spherical shaped valve member ends
    • 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
    • F02M53/00—Fuel-injection apparatus characterised by having heating, cooling or thermally-insulating means
    • F02M53/04—Injectors with heating, cooling, or thermally-insulating 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
    • F02M61/18—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for
    • 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
    • F02M2200/06—Fuel-injection apparatus having means for preventing coking, e.g. of fuel injector discharge orifices or valve needles
    • 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
    • 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
    • F02M61/168—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

Definitions

  • the invention relates to a fuel injector according to the preamble of the main claim.
  • a fuel injection system for a mixture-compressing, spark-ignition internal combustion engine which comprises a fuel injection valve, which injects fuel into a combustion chamber formed by a piston / cylinder construction, and is provided with a spark plug projecting into the combustion chamber.
  • the fuel injector is provided with at least one row of injection holes distributed over the circumference of the fuel injector.
  • a disadvantage of the fuel injector known from the abovementioned publication is, in particular, the " coking of the spray orifices, which thereby block and inadmissibly reduce the flow through the fuel injector. This leads to malfunctions of the internal combustion engine.
  • the fuel injector according to the invention with the characterizing features of the main claim has the advantage that a flame protection screen arranged downstream of the spray orifices reduces the temperature of the flame front of the burning mixture cloud in the area of the spray orifices so much that no fuel can be deposited on the valve seat body, as a result of which the spray orifices increase is avoided by coking residues.
  • the flame retardant screen is advantageously made from a wire mesh which is attached to the valve seat body by means of a fastening ring.
  • the flame retardant screen can also be made from sheet metal, which can be provided with openings by drilling, punching or etching.
  • fastening ring axially projects beyond the flame protection screen in a fuel outflow direction, since the flame protection screen is thereby shielded from the flow circulating in the combustion chamber and fuel cannot be deposited on the flame protection screen.
  • Fig. 1 shows a schematic section through an embodiment of an inventive designed fuel injector s in an overall view
  • Fig. 2 shows a schematic section through the spray-side part of the shown in Fig. 1
  • Fig. 3 is a plan view of the flame protection screen with viewing direction III in Fig. 2 and
  • Fig. 4 is a plan view of the flame retardant screen with viewing direction IV in Fig. 2 according to a modified embodiment.
  • Fig. 1 shows an exemplary sectional view of an embodiment of an inventive
  • Fuel injection valve 1 is designed in the form of a fuel injection valve 1 for fuel injection systems of mixture-compressing, spark-ignition internal combustion engines.
  • the fuel injection valve 1 is 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, for example, operatively connected via a weld seam 41 to a valve closing body 4, which cooperates with a valve seat surface 6 arranged on a valve seat body 5 to form a sealing seat.
  • the fuel injection valve 1 is an inward opening fuel injection valve 1 which has two spray openings 7.
  • the valve closing body 4 of the fuel injector 1 designed according to the invention has an almost spherical shape. As a result, an offset-free, cardanic valve needle guide is achieved, which ensures that fuel injector 1 functions exactly.
  • the valve seat body 5 of the fuel injection valve 1 is, for example, pot-shaped and, due to its shape, contributes to the valve needle guidance.
  • the valve seat body 5 is inserted into an injection-side recess 34 in the nozzle body 2 and is connected to the nozzle body 2 by means of a weld seam 35.
  • the nozzle body 2 is a seal 8 against an outer pole 9 acting as an actuator for the valve needle 3
  • the solenoid 10 is in one
  • the inner pole 13 and the outer pole 9 are separated from one another by a gap 26 and are supported on one
  • the solenoid 10 is a
  • Line 19 is excited 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.
  • the 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 flange 21 to the valve needle 3, which is connected to the first flange 21 by a weld seam 22.
  • a restoring spring 23 is supported on the first flange 21, which in the present design of the fuel injector 1 is preloaded by a sleeve 24.
  • a second flange 31 is arranged on the downstream side of the armature 20 and serves as a lower armature stop. It is non-positively connected to the valve needle 3 via a weld seam 33.
  • An elastic intermediate ring 32 is arranged between the armature 20 and the second flange 31 for damping armature bumpers when the fuel injector 1 closes.
  • Fuel channels 30a and 30b run in the valve needle guide 14 and in the armature 20.
  • the fuel is supplied via a central fuel supply 16 and filtered by a filter element 25. Grindings 36 take over the fuel supply to the sealing seat in the area of the valve seat support 5.
  • the fuel injector 1 is sealed by a seal 28 against a distribution line, not shown.
  • the fuel injection valve 1 on the valve seat body 5 which is arranged in a recess 34 of the nozzle body 2 and is connected to it, for example, by means of a weld seam 35, has a flame protection screen 37, which is attached downstream of the spray openings 7 by means of a fastening ring 38. Its arrangement on the outflow side of the spray openings 7 reduces the tendency to coke and thus prevents malfunctions of the fuel injector 1 by clogging the spray openings 7 and an impermissible reduction in the fuel flow.
  • the spray-side part of the fuel injection valve 1 with the measures according to the invention is shown and explained in more detail in FIG. 2.
  • the first flange 21 on the valve needle 3 is acted upon by the return spring 23 against a lifting direction in such a way that the valve closing body 4 on the valve seat 6 is held in sealing contact.
  • the armature 20 rests on the intermediate ring 32, which is supported on the second flange 31.
  • 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 armature 20 takes the first flange 21, which is welded to the valve needle 3, and thus also the valve needle 3 in the lifting direction.
  • the valve closing body 4, which is operatively connected to the valve needle 3, lifts off from the valve seat surface 6, as a result of which the fuel is sprayed off at the spray openings 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 on the first flange 21, as a result of which the valve needle 3 moves counter to the stroke direction.
  • the valve closing body 4 rests on the valve seat surface 6 and the fuel injection valve 1 is closed.
  • the armature 20 rests on the armature stop formed by the second flange 31.
  • FIG. 2 shows an excerpted sectional illustration of the section designated II in FIG. 1 from the exemplary embodiment of a fuel injector 1 designed according to the invention shown in FIG. 1.
  • the valve seat body 5 in the exemplary embodiment has a fastening ring 38 on an outer end face 39 facing the combustion chamber, which is not shown, by means of which a flame protection screen 37 is fixed on the downstream side of the valve seat body 5.
  • the fastening ring can, for example, be fixed to the valve seat body 5 by means of a weld seam 40 and is supported on a shoulder 43 of the valve seat body 5.
  • the coking of the spray openings 7 can be reduced by the arrangement of the flame protection screen 37 on the outflow side of the spray openings 7. Since the diameter of the spray openings 7 is typically approximately 100 ⁇ m, there is a risk that the spray openings 7 will clog over time due to coking and thus the flow rate is inadmissible is severely restricted, relatively large. This is due in particular to the high temperatures when the mixture cloud injected into the combustion chamber is ignited, since components of the fuel settle at the tip of the fuel injection valve 1. By attaching the flame protection screen 37, the surface temperature in the outlet area of the spray openings 7 can be reduced to such an extent that the spray openings 7 cannot grow over due to coking residues.
  • the flame protection screen 37 which thus has the function of a flame protection, thereby prevents the flame front from spreading in the area between the flame protection screen 37 and the valve seat body 5.
  • the above-mentioned flame protection function of the flame protection screen 37 can be supported by a corresponding shaping of the valve seat body 5 and the fastening ring 38.
  • the flame retardant screen closes the outlet area of the spray openings 7 from the combustion chamber, as a result of which a spray area 44 is delimited from the latter.
  • the fastening ring 38 is shaped in such a way that it continues the shape of the valve seat body 5 in the area of the spraying area 44 in the spraying direction, so that overall a funnel-shaped shape of the spraying area results.
  • the mounting ring 38 projects beyond the flame retardant screen 37 in the axial direction, so that in addition to the flame retardant function of the flame retardant screen 37, the mounting ring 38 also has a shielding function against the downstream end 42 of the fuel injector 1, since it protects the flame retardant screen 37 against the combustion chamber currents, which are tangent to the Circulate fuel injector 1 in the combustion chamber, shields.
  • the flame retardant screen 37 preferably consists, as shown in FIG. 3, of a mesh of metal wires, but it is also conceivable to use a correspondingly shaped sheet, such as shown in Fig. 4, for example by means of drilling, punching or etching with openings.
  • the invention is not limited to the exemplary embodiments shown and can be used for any construction of fuel injection valves 1.

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

The invention relates to a fuel-injection valve (1) for fuel-injection systems of internal combustion engines. Said valve comprises an actuator, a valve needle (3) that can be actuated by the actuator for operating a valve closing body (4), which forms a seal seat with a valve-seat surface (6) that is configured on a valve-seat body (5) and at least one injection orifice (7), which is configured in the valve-seat body (5). A flame-resistant screen (37) is positioned at the outflow end (42) of the fuel-injection valve (1), which shields the injection orifices (7) from the combustion chamber of the internal combustion engine.

Description

Brennstoffeinspritzventil Fuel injector
Stand der TechnikState of the art
Die Erfindung geht aus von einem Brennstoffeinspritzventil nach der Gattung des Hauptanspruchs .The invention relates to a fuel injector according to the preamble of the main claim.
Aus der DE 198 04 463 AI ist ein Brennstoffeinspxitzsystem für eine gemischverdichtende, fremdgezündete Brennkraftmaschine bekannt, welches ein Brennstoffeinspritzventil umfaßt, das Brennstoff in einen von einer Kolben-/Zylinderkonstruktion gebildeten Brennraum einspritzt, und mit einer in den Brennraum ragenden Zündkerze versehen ist. Das Brennstoffeinspritzventil ist mit mindestens einer Reihe über den Umfang des Brennstoffeinspritzventils verteilt angeordneten Einspritzlöchern versehen. Durch eine gezielte Einspritzung von Brennstoff über ' die Einspritzlöcher wird eine strahlgeführtes Brennverfahren durch Bildung einer Gemischwolke mit mindestens einem Strahl realisiert.From DE 198 04 463 AI a fuel injection system for a mixture-compressing, spark-ignition internal combustion engine is known, which comprises a fuel injection valve, which injects fuel into a combustion chamber formed by a piston / cylinder construction, and is provided with a spark plug projecting into the combustion chamber. The fuel injector is provided with at least one row of injection holes distributed over the circumference of the fuel injector. Through a targeted injection of fuel on 'the injection holes, a jet-controlled combustion method is realized by forming a mixture cloud with at least one beam.
Nachteilig an dem aus der obengenannten Druckschrif bekannten Brennstoffeinspritzventil ist insbesondere die "Verkokung der Abspritzöffnungen, welche dadurch verstopfen und den Durchfluß durch das Brennstoffeinspritzventil unzulässig stark vermindern. Dies führt zu Fehl funktionen der Brennkraftmaschine. Vorteile der ErfindungA disadvantage of the fuel injector known from the abovementioned publication is, in particular, the " coking of the spray orifices, which thereby block and inadmissibly reduce the flow through the fuel injector. This leads to malfunctions of the internal combustion engine. Advantages of the invention
Das erfindungsgemäße Brennstoffeinspritzventil mit den kennzeichnenden Merkmalen des Hauptanspruchs hat demgegenüber den Vorteil, daß ein abströmseitig der Abspritzöffnungen angeordnetes Flammschutzsieb die Temperatur der Flammfront der durchbrennenden Gemischwolke im Bereich der Abspritzöffnungen so stark verringert, daß sich kein Brennstoff am Ventilsitzkorper niederschlagen kann, wodurch ein Zuwachsen der Abspritzöffnungen durch Verkokungsrückstände vermieden wird.The fuel injector according to the invention with the characterizing features of the main claim has the advantage that a flame protection screen arranged downstream of the spray orifices reduces the temperature of the flame front of the burning mixture cloud in the area of the spray orifices so much that no fuel can be deposited on the valve seat body, as a result of which the spray orifices increase is avoided by coking residues.
Durch die in den Unteransprüchen aufgeführten Maßnahmen sind vorteilhafte Weiterbildungen des im Hauptanspruch angegebenen Brennstoffeinspritzventils möglich.The measures listed in the subclaims permit advantageous developments of the fuel injector specified in the main claim.
Vorteilhafterweise ist das Flammschutzsieb aus einem Drahtgeflecht hergestellt, welches mittels eines Befestigungsrings am Ventilsitzkorper angebracht wird. Das Flammschutzsieb ist auch aus einem Blech herstellbar, welches mittels Bohren, Stanzen oder Ätzen mit Öffnungen versehen werden kann.The flame retardant screen is advantageously made from a wire mesh which is attached to the valve seat body by means of a fastening ring. The flame retardant screen can also be made from sheet metal, which can be provided with openings by drilling, punching or etching.
Weiterhin ist von Vorteil, daß der Befestigungsring das Flammschutzsieb in einer Abströmrichtung des Brennstoffs axial überragt, da dadurch das Flammschutzsieb vor der im Brennraum zirkulierenden Strömung abgeschirmt ist und sich Brennstoff nicht am Flammschutzsieb niederschlagen kann.It is also advantageous that the fastening ring axially projects beyond the flame protection screen in a fuel outflow direction, since the flame protection screen is thereby shielded from the flow circulating in the combustion chamber and fuel cannot be deposited on the flame protection screen.
Zeichnungdrawing
Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung vereinfacht dargestellt und in der nachfolgenden Beschreibung näher erläutert. Es zeigen:An embodiment of the invention is shown in simplified form in the drawing and explained in more detail in the following description. Show it:
Fig. 1 einen schematischen Schnitt durch ein Ausführungsbeispiel eines erfindungsgemäß ausgestalteten Brennstoffeinspritzventil s in einer Gesamtansicht ;Fig. 1 shows a schematic section through an embodiment of an inventive designed fuel injector s in an overall view;
Fig. 2 einen schematischen Schnitt durch den abspritzseitigen Teil des in Fig. 1 dargestelltenFig. 2 shows a schematic section through the spray-side part of the shown in Fig. 1
Ausführungsbeispiels des erfindungsgemäßen Brennstoffeinspritzventils im Bereich II in Fig. 1;Embodiment of the fuel injector according to the invention in area II in Fig. 1;
Fig. 3 eine Aufsicht auf das Flammschutzsieb mit Blickrichtung III in Fig. 2 undFig. 3 is a plan view of the flame protection screen with viewing direction III in Fig. 2 and
Fig. 4 eine Aufsicht auf das Flammschutzsieb mit Blickrichtung IV in Fig. 2 entsprechend einem abgewandelten Ausführungsbeispiel .Fig. 4 is a plan view of the flame retardant screen with viewing direction IV in Fig. 2 according to a modified embodiment.
Beschreibung der AusführungsbeispieleDescription of the embodiments
Fig. 1 zeigt in einer auszugsweisen Schnittdarstellung ein Ausführungsbeispiel eines erfindungsgemäßenFig. 1 shows an exemplary sectional view of an embodiment of an inventive
Brennstoffeinspritzventils 1. Das Brennstoffeinspritzventil 1 ist in der Form eines Brennstoffeinspritzventils 1 für Brennstoffeinspritzanlagen von gemischverdichtenden, fremdgezündeten Brennkraftmaschinen ausgeführt . Das Brennstoffeinspritzventil 1 eignet sich zum direkten Einspritzen von Brennstoff in einen nicht dargestellten Brennraum einer Brennkraftmaschine.Fuel injection valve 1. The fuel injection valve 1 is designed in the form of a fuel injection valve 1 for fuel injection systems of mixture-compressing, spark-ignition internal combustion engines. The fuel injection valve 1 is suitable for injecting fuel directly into a combustion chamber (not shown) of an internal combustion engine.
Das Brennstoffeinspritzventil 1 besteht aus einem Düsenkörper 2, in welchem eine Ventilnadel 3 angeordnet ist. Die Ventilnadel 3 steht beispielsweise über eine Schweißnaht 41 in Wirkverbindung mit einem Ventilschließkörper 4, der mit einer auf einem Ventilsitzkorper 5 angeordneten Ventilsitzfläche 6 zu einem Dichtsitz zusammenwirkt. Bei dem Brennstoffeinspritzventil 1 handelt es sich im Ausführungsbeispiel um ein nach innen öffnendes Brennstoffeinspritzventil 1, welches über zwei Abspritzöffnungen 7 verfügt. Der Ventilschließkörper 4 des erfindungsge äß ausgestalteten Brennstoffeinspritzventils 1 weist eine nahezu kugelförmige Form auf. Dadurch wird eine versatzfreie, kardanische Ventilnadelführung erzielt, die für eine exakte Funktionsweise des Brennstoffeinspritzventils 1 sorgt.The fuel injector 1 consists of a nozzle body 2, in which a valve needle 3 is arranged. The valve needle 3 is, for example, operatively connected via a weld seam 41 to a valve closing body 4, which cooperates with a valve seat surface 6 arranged on a valve seat body 5 to form a sealing seat. In the exemplary embodiment, the fuel injection valve 1 is an inward opening fuel injection valve 1 which has two spray openings 7. The valve closing body 4 of the fuel injector 1 designed according to the invention has an almost spherical shape. As a result, an offset-free, cardanic valve needle guide is achieved, which ensures that fuel injector 1 functions exactly.
Der Ventilsitzkorper 5 des Brennstoffeinspritzventils 1 ist beispielsweise topfför ig ausgebildet und trägt durch seine Form zur Ventilnadelführung bei. Der Ventilsitzkorper 5 ist dabei in eine abspritzseitige Ausnehmung 34 des Düsenkörpers 2 eingesetzt und mittels einer Schweißnaht 35 mit dem Düsenkörper 2 verbunden.The valve seat body 5 of the fuel injection valve 1 is, for example, pot-shaped and, due to its shape, contributes to the valve needle guidance. The valve seat body 5 is inserted into an injection-side recess 34 in the nozzle body 2 and is connected to the nozzle body 2 by means of a weld seam 35.
Der Düsenkörper 2 ist durch eine Dichtung 8 gegen einen Außenpol 9 einer als Aktor für die Ventilnadel 3 wirkendenThe nozzle body 2 is a seal 8 against an outer pole 9 acting as an actuator for the valve needle 3
Magnetspule 10 abgedichtet. Die Magnetspule 10 ist in einemMagnetic coil 10 sealed. The solenoid 10 is in one
Spulengehäuse 11 gekapselt und auf einen Spulenträger 12 gewickelt, welcher an einem Innenpol 13 der Magnetspule 10 anliegt. Der Innenpol 13 und der Außenpol 9 sind durch einen Spalt 26 voneinander getrennt und stützen sich auf einemEncapsulated 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 one
Verbindungsbauteil 29 ab. Die Magnetspule 10 wird über eineConnecting component 29 from. The solenoid 10 is a
Leitung 19 von einem über einen elektrischen Steckkontakt 17 zuführbaren elektrischen Strom erregt. Der Steckkontakt 17 ist von einer Kunststoffummantelung 18 umgeben, die am Innenpol 13 angespritzt sein kann.Line 19 is excited 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.
Die Ventilnadel 3 ist in einer Ventilnadelführung 14 geführt, welche scheibenförmig ausgeführt ist. Zur Hubeinstellung dient eine zugepaarte Einstellscheibe 15. An der anderen Seite der Einstellscheibe 15 befindet sich ein Anker 20. Dieser steht über einen ersten Flansch 21 kraftschlüssig mit der Ventilnadel 3 in Verbindung, welche durch eine Schweißnaht 22 mit dem ersten Flansch 21 verbunden ist. Auf dem ersten Flansch 21 stützt sich eine Rückstellfeder 23 ab, welche in der vorliegenden Bauform des Brennstoffeinspritzventils 1 durch eine Hülse 24 auf Vorspannung gebracht wird. Abströmseitig des Ankers 20 ist ein zweiter Flansch 31 angeordnet, der als unterer Ankeranschlag dient. Er ist über eine Schweißnaht 33 kraftschlüssig mit der Ventilnadel 3 verbunden. Zwischen dem Anker 20 und dem zweiten Flansch 31 ist ein elastischer Zwischenring 32 zur Dämpfung von Ankerprellern beim Schließen des Brennstoffeinspritzventils 1 angeordnet .The 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 flange 21 to the valve needle 3, which is connected to the first flange 21 by a weld seam 22. A restoring spring 23 is supported on the first flange 21, which in the present design of the fuel injector 1 is preloaded by a sleeve 24. A second flange 31 is arranged on the downstream side of the armature 20 and serves as a lower armature stop. It is non-positively connected to the valve needle 3 via a weld seam 33. An elastic intermediate ring 32 is arranged between the armature 20 and the second flange 31 for damping armature bumpers when the fuel injector 1 closes.
In der Ventilnadelführung 14 und im Anker 20 verlaufen Brennstoffkanäle 30a und 30b. Der Brennstoff wird über eine zentrale Brennstoffzufuhr 16 zugeführt und durch ein Filterelement 25 gefiltert. Anschliffe 36 übernehmen im Bereich des Ventilsitzträgers 5 die Brennstoffzufuhr zum Dichtsitz. Das Brennstoffeinspritzventil 1 ist durch eine Dichtung 28 gegen eine nicht weiter dargestellte Verteilerleitung abgedichtet.Fuel channels 30a and 30b run in the valve needle guide 14 and in the armature 20. The fuel is supplied via a central fuel supply 16 and filtered by a filter element 25. Grindings 36 take over the fuel supply to the sealing seat in the area of the valve seat support 5. The fuel injector 1 is sealed by a seal 28 against a distribution line, not shown.
Erfindungsgemäß weist das Brennstoffeinspritzventil 1 an dem Ventilsitzkorper 5, der in einer Ausnehmung 34 des Düsenkörpers 2 angeordnet und beispielsweise mittels einer Schweißnaht 35 mit diesem verbunden ist, ein Flammschutzsieb 37 auf, welches abströmseitig der Abspritzöffnungen 7 mittels eines Befestigungsrings 38 angebracht ist. Es vermindert durch seine Anordnung abströmseitig der Abspritzöffnungen 7 die Verkokungsneigung und beugt so Fehlfunktionen des Brennstoffeinspritzventils 1 durch Verstopfen der Abspritzöffnungen 7 und einer unzulässigen Verringerung des Brennstoffdurchflusses vor. Der abspritzseitige Teil des Brennstoffeinspritzventils 1 mit den erfindungsgemäßen Maßnahmen ist in Fig. 2 näher dargestellt und erläutert.According to the invention, the fuel injection valve 1 on the valve seat body 5, which is arranged in a recess 34 of the nozzle body 2 and is connected to it, for example, by means of a weld seam 35, has a flame protection screen 37, which is attached downstream of the spray openings 7 by means of a fastening ring 38. Its arrangement on the outflow side of the spray openings 7 reduces the tendency to coke and thus prevents malfunctions of the fuel injector 1 by clogging the spray openings 7 and an impermissible reduction in the fuel flow. The spray-side part of the fuel injection valve 1 with the measures according to the invention is shown and explained in more detail in FIG. 2.
Im Ruhezustand des Brennstoffeinspritzventils 1 wird der erste Flansch 21 an der Ventilnadel 3 von der Rückstellfeder 23 entgegen einer Hubrichtung so beaufschlagt, daß der Ventilschließkörper 4 am Ventilsitz 6 in dichtender Anlage gehalten wird. Der Anker 20 liegt auf dem Zwischenring 32 auf, der sich auf dem zweiten Flansch 31 abstützt. Bei Erregung der Magnetspule 10 baut diese ein Magnetfeld auf, welches den Anker 20 entgegen der Federkraft der Rückstellfeder 23 in Hubrichtung bewegt. Dabei nimmt der Anker 20 den ersten Flansch 21, welcher mit der Ventilnadel 3 verschweißt ist, und damit die Ventilnadel 3 ebenfalls in Hubrichtung mit. Der mit der Ventilnadel 3 in Wirkverbindung stehende Ventilschließkörper 4 hebt von der Ventilsitzflache 6 ab, wodurch der Brennstoff an den Abspritzöffnungen 7 abgespritzt wird.In the idle state of the fuel injector 1, the first flange 21 on the valve needle 3 is acted upon by the return spring 23 against a lifting direction in such a way that the valve closing body 4 on the valve seat 6 is held in sealing contact. The armature 20 rests on the intermediate ring 32, which is supported on the second flange 31. 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 armature 20 takes the first flange 21, which is welded to the valve needle 3, and thus also the valve needle 3 in the lifting direction. The valve closing body 4, which is operatively connected to the valve needle 3, lifts off from the valve seat surface 6, as a result of which the fuel is sprayed off at the spray openings 7.
Wird der Spulenstrom abgeschaltet, fällt der Anker 20 nach genügendem Abbau des Magnetfeldes durch den Druck der Rückstellfeder 23 auf den ersten Flansch 21 vom Innenpol 13 ab, wodurch sich die Ventilnadel 3 entgegen der Hubrichtung bewegt. Dadurch setzt der Ventilschließkörper 4 auf der Ventilsitzfläche 6 auf, und das Brennstoffeinspritzventil 1 wird geschlossen. Der Anker 20 setzt auf dem durch den zweiten Flansch 31 gebildeten Ankeranschlag auf.If the coil current is switched off, 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 on the first flange 21, as a result of which the valve needle 3 moves counter to the stroke direction. As a result, the valve closing body 4 rests on the valve seat surface 6 and the fuel injection valve 1 is closed. The armature 20 rests on the armature stop formed by the second flange 31.
Fig. 2 zeigt in einer auszugsweisen Schnittdarstellung den in Fig. 1 mit II bezeichneten Ausschnitt aus dem in Fig. 1 dargestellten Ausführungsbeispiel eines erfindungsgemäß ausgestalteten Brennstoffeinspritzventils 1.FIG. 2 shows an excerpted sectional illustration of the section designated II in FIG. 1 from the exemplary embodiment of a fuel injector 1 designed according to the invention shown in FIG. 1.
Wie bereits in Fig. 1 angedeutet, weist der Ventilsitzkorper 5 im Ausführungsbeispiel an einer dem nicht weiter dargestellten Brennraum zugewandten äußeren Stirnseite 39 einen Befestigungsring 38 auf, durch welchen ein Flammschutzsieb 37 an der abströmseitigen Seite des Ventilsitzkörpers 5 fixiert ist. Der Befestigungsring kann dabei beispielsweise mittels einer Schweißnaht 40 am Ventilsitzkorper 5 fixiert sein und stützt sich an einem Absatz 43 des Ventilsitzkörpers 5 ab.As already indicated in FIG. 1, the valve seat body 5 in the exemplary embodiment has a fastening ring 38 on an outer end face 39 facing the combustion chamber, which is not shown, by means of which a flame protection screen 37 is fixed on the downstream side of the valve seat body 5. The fastening ring can, for example, be fixed to the valve seat body 5 by means of a weld seam 40 and is supported on a shoulder 43 of the valve seat body 5.
Durch die Anordnung des Flammschutzsiebes 37 abströmseitig der Abspritzöffnungen 7 kann die Verkokung der Abspritzöffnungen 7 reduziert werden. Da der Durchmesser der Abspritzöffnungen 7 typischerweise ca. 100 μm beträgt, ist die Gefahr, daß die Abspritzöffnungen 7 durch Verkokung mit der Zeit verstopfen und somit die Durchflußmenge unzulässig stark eingeschränkt wird, relativ groß. Dies ist insbesondere durch die hohen Temperaturen beim Durchzünden der in den Brennraum eingespritzten Gemischwolke bedingt, da sich .dadurch Bestandteile des Brennstoffs an der Spitze des Brennstoffeinspritzventils 1 absetzen. Durch die Anbringung des Flammschutzsiebes 37 kann die Oberflächentemperatur im Austrittsbereich der Abspritzöffnungen 7 so weit reduziert werden, daß die Abspritzöffnungen 7 nicht durch Verkokungsrückstände zuwachsen können. Das Flammschutzsieb 37, welches somit die Funktion eines Flammschutzes hat, verhindert dadurch die Ausbreitung der Flammfront im Bereich zwischen dem Flammschutzsieb 37 und dem Ventilsitzkorper 5.The coking of the spray openings 7 can be reduced by the arrangement of the flame protection screen 37 on the outflow side of the spray openings 7. Since the diameter of the spray openings 7 is typically approximately 100 μm, there is a risk that the spray openings 7 will clog over time due to coking and thus the flow rate is inadmissible is severely restricted, relatively large. This is due in particular to the high temperatures when the mixture cloud injected into the combustion chamber is ignited, since components of the fuel settle at the tip of the fuel injection valve 1. By attaching the flame protection screen 37, the surface temperature in the outlet area of the spray openings 7 can be reduced to such an extent that the spray openings 7 cannot grow over due to coking residues. The flame protection screen 37, which thus has the function of a flame protection, thereby prevents the flame front from spreading in the area between the flame protection screen 37 and the valve seat body 5.
Die oben angesprochen Flammschutzfunktion des Flammschutzsiebes 37 kann durch eine entsprechende Formgebung des Ventilsitzkörpers 5 und des Befestigungsringes 38 unterstützt werden. Das Flammschutzsieb schließt, wie bereits erläutert, den Austrittsbereich der Abspritzöffnungen 7 gegen den Brennraum ab, wodurch ein Abspritzbereich 44 gegen diesen abgegrenzt wird. Der Befestigungsring 38 ist so geformt, daß er die Form des Ventilsitzkörpers 5 im Bereich des Abspritzbereichs 44 in Abspritzrichtung weiterführt, so daß sich insgesamt eine trichterförmige Form des Abspritzbereichs ergibt.The above-mentioned flame protection function of the flame protection screen 37 can be supported by a corresponding shaping of the valve seat body 5 and the fastening ring 38. As already explained, the flame retardant screen closes the outlet area of the spray openings 7 from the combustion chamber, as a result of which a spray area 44 is delimited from the latter. The fastening ring 38 is shaped in such a way that it continues the shape of the valve seat body 5 in the area of the spraying area 44 in the spraying direction, so that overall a funnel-shaped shape of the spraying area results.
Zudem überragt der Befestigungsring 38 das Flammschutzsieb 37 in axialer Richtung, so daß zusätzlich zu der Flammschutzfunktion des Flammschutzsiebes 37 auch der Befestigungsring 38 eine abschirmende Funktion gegenüber dem abströmseitigen Ende 42 des Brennstoffeinspritzventils 1 übernimmt, da er das Flammschutzsieb 37 gegen die Brennraumströmungen, welche tangential zum Brennstoffeinspritzventil 1 im Brennraum zirkulieren, abschirmt .In addition, the mounting ring 38 projects beyond the flame retardant screen 37 in the axial direction, so that in addition to the flame retardant function of the flame retardant screen 37, the mounting ring 38 also has a shielding function against the downstream end 42 of the fuel injector 1, since it protects the flame retardant screen 37 against the combustion chamber currents, which are tangent to the Circulate fuel injector 1 in the combustion chamber, shields.
Das Flammschutzsieb 37 besteht vorzugsweise, wie in Fig. 3 dargestellt, aus einem Geflecht von Metalldrähten, es ist jedoch auch denkbar, ein entsprechend geformtes Blech, wie in Fig. 4 dargestellt, z.B. mittels Bohren, Stanzen oder Ätzen mit Öffnungen zu versehen.The flame retardant screen 37 preferably consists, as shown in FIG. 3, of a mesh of metal wires, but it is also conceivable to use a correspondingly shaped sheet, such as shown in Fig. 4, for example by means of drilling, punching or etching with openings.
Die Erfindung ist nicht auf die dargestellten Ausfuhrungsbeispiele beschränkt und für beliebige Bauweisen von Brennstof einspritzventilen 1 anwendbar. The invention is not limited to the exemplary embodiments shown and can be used for any construction of fuel injection valves 1.

Claims

Ansprüche Expectations
1. Brennstoffeinspritzventil (1) zum direkten Einspritzen von Brennstoff in einen Brennraum einer Brennkraftmaschine mit einem Aktor (10) , einer von dem Aktor (10) betätigbaren1. Fuel injection valve (1) for injecting fuel directly into a combustion chamber of an internal combustion engine with an actuator (10), which can be actuated by the actuator (10)
Ventilnadel (3) zur Betätigung eines VentilschließkörpersValve needle (3) for actuating a valve closing body
(4), der zusammen mit einer an einem Ventilsitzkorper (5) ausgebildeten Ventilsitzfl che (6) einen Dichtsitz bildet, und zumindest einer Abspritzöffnung (7) , die in dem Ventilsitzkorper (5) ausgebildet ist, dadurch gekennzeichnet, daß an einem abströmseitigen Ende (42) des Brennstoffeinspritzventils (1) ein Flammschutzsieb (37) angeordnet ist; welches die Abspritzöffnungen (7) gegen den Brennraum der Brennkraftmaschine abschirmt.(4), which forms a sealing seat together with a valve seat surface (6) formed on a valve seat body (5), and at least one spray opening (7) formed in the valve seat body (5), characterized in that at an outflow end (42) of the fuel injection valve (1) a flame protection screen (37) is arranged; which shields the spray openings (7) against the combustion chamber of the internal combustion engine.
2. Brennstoffeinspritzventil nach Anspruch 1, dadurch gekennzeichnet, daß das Flammschutzsieb (37) mittels eines Befestigungsrings (38) am abströmseitigen Ende des Brennstoffeinspritzventils (1) angebracht ist.2. Fuel injection valve according to claim 1, characterized in that the flame protection screen (37) by means of a fastening ring (38) is attached to the downstream end of the fuel injector (1).
3. Brennstoffeinspritzventil nach Anspruch 2, dadurch gekennzeichnet, daß der Befestigungsring (38) mittels einer Schweißnaht (40) an dem Ventilsitzkorper (5) fixiert ist. 3. Fuel injection valve according to claim 2, characterized in that the fastening ring (38) is fixed by means of a weld seam (40) on the valve seat body (5).
4. Brennstoffeinspritzventil nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß das Flammschutzsieb (37) einen zwischen dem Ventilsitzträger (5) und dem Flammschutzsieb (37) befindlichen Abspritzbereich (44) gegen den Brennraum abgrenzt .4. Fuel injection valve according to one of claims 1 to 3, characterized in that the flame protection screen (37) delimits a spray area (44) located between the valve seat support (5) and the flame protection screen (37) against the combustion chamber.
5. Brennstoffeinspritzventil nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß das Flammschutzsieb (37) aus einem Geflecht von5. Fuel injection valve according to one of claims 1 to 4, characterized in that the flame retardant screen (37) from a mesh of
Metalldrähten besteht.There is metal wire.
6. Brennstoffeinspritzventil nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß das Flammschutzsieb (37) aus einem Blech mit in dieses eingebrachte Öffnungen besteht.6. Fuel injection valve according to one of claims 1 to 4, characterized in that the flame protection screen (37) consists of a sheet metal with openings made therein.
7. Brennstoffeinspritzventil nach Anspruch 6, dadurch gekennzeichnet, daß die Öffnungen mittels Stanzen, Bohren oder Ätzen in das7. Fuel injection valve according to claim 6, characterized in that the openings by means of punching, drilling or etching in the
Blech eingebracht sind.Sheet are introduced.
8. Brennstoffeinspritzventil nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, daß sich der Befestigungsring (38) an einem Absatz (43) des Ventilsitzkörpers (5) abstützt.8. Fuel injection valve according to one of claims 1 to 7, characterized in that the fastening ring (38) on a shoulder (43) of the valve seat body (5) is supported.
9. Brennstoffeinspritzventil nach Anspruch 2 oder 3, dadurch gekennzeichnet, daß der Befestigungsring (38) so geformt ist, daß er das Flammschutzsieb (37) in einer Abströmrichtung axial überragt . 9. Fuel injection valve according to claim 2 or 3, characterized in that the fastening ring (38) is shaped such that it axially projects beyond the flame retardant screen (37) in a flow direction.
EP02742710A 2001-06-22 2002-05-07 Fuel-injection valve Expired - Lifetime EP1402176B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10130206A DE10130206A1 (en) 2001-06-22 2001-06-22 Fuel injector
DE10130206 2001-06-22
PCT/DE2002/001629 WO2003001053A1 (en) 2001-06-22 2002-05-07 Fuel-injection valve

Publications (2)

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EP1402176A1 true EP1402176A1 (en) 2004-03-31
EP1402176B1 EP1402176B1 (en) 2005-04-27

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ID=7689116

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US (1) US7014129B2 (en)
EP (1) EP1402176B1 (en)
JP (1) JP2004521254A (en)
KR (1) KR100853642B1 (en)
DE (2) DE10130206A1 (en)
WO (1) WO2003001053A1 (en)

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10314670A1 (en) * 2003-04-01 2004-10-14 Robert Bosch Gmbh Process for manufacturing and fastening a perforated disc
US7124963B2 (en) * 2004-11-05 2006-10-24 Visteon Global Technologies, Inc. Low pressure fuel injector nozzle
JP4511960B2 (en) * 2005-01-26 2010-07-28 株式会社ケーヒン Fuel injection valve
JP4502829B2 (en) * 2005-01-27 2010-07-14 株式会社ケーヒン Fuel injection valve
JP4502828B2 (en) * 2005-01-27 2010-07-14 株式会社ケーヒン Fuel injection valve
JP4490840B2 (en) * 2005-01-28 2010-06-30 株式会社ケーヒン Fuel injection valve
US7669789B2 (en) * 2007-08-29 2010-03-02 Visteon Global Technologies, Inc. Low pressure fuel injector nozzle
US20090057446A1 (en) * 2007-08-29 2009-03-05 Visteon Global Technologies, Inc. Low pressure fuel injector nozzle
US20090090794A1 (en) * 2007-10-04 2009-04-09 Visteon Global Technologies, Inc. Low pressure fuel injector
US9822969B2 (en) * 2010-11-30 2017-11-21 General Electric Company Fuel injector having tip cooling
US9175656B2 (en) * 2010-12-20 2015-11-03 Toyota Jidosha Kabushiki Kaisha Fuel injection valve
US20140116391A1 (en) * 2012-10-31 2014-05-01 Electro-Motive Diesel, Inc. Fuel system having an injector blocking member
JP5983795B2 (en) * 2015-02-09 2016-09-06 株式会社デンソー Fuel injection valve
DE102015225055A1 (en) * 2015-12-14 2017-06-14 Robert Bosch Gmbh fuel injector
DE102015226769A1 (en) * 2015-12-29 2017-06-29 Robert Bosch Gmbh Fuel injector
GB2552673B (en) * 2016-08-02 2020-02-19 Delphi Tech Ip Ltd SCR doser spray atomization
US10865754B2 (en) * 2017-04-05 2020-12-15 Progress Rail Services Corporation Fuel injector having needle tip and nozzle body surfaces structured for reduced sac volume and fracture resistance

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4030668A (en) * 1976-06-17 1977-06-21 The Bendix Corporation Electromagnetically operated fuel injection valve
US5707012A (en) * 1993-12-21 1998-01-13 Robert Bosch Gmbh Atomizing sieve and fuel injection valve having an atomizing sieve
DE4435270A1 (en) * 1994-10-01 1996-04-04 Bosch Gmbh Robert Fuel injector
US5765750A (en) * 1996-07-26 1998-06-16 Siemens Automotive Corporation Method and apparatus for controlled atomization in a fuel injector for an internal combustion engine
DE19804463B4 (en) 1998-02-05 2006-06-14 Daimlerchrysler Ag Fuel injection system for gasoline engines
DE19900231A1 (en) * 1999-01-07 2000-07-20 Deutsch Zentr Luft & Raumfahrt Method for improving burn in IC engine has a porous insert in the cylinder to control the burn volume
DE10130685A1 (en) * 2001-06-26 2003-01-02 Bosch Gmbh Robert Fuel injector

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO03001053A1 *

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KR100853642B1 (en) 2008-08-25
JP2004521254A (en) 2004-07-15
WO2003001053A1 (en) 2003-01-03
DE50202925D1 (en) 2005-06-02
US7014129B2 (en) 2006-03-21
US20040099243A1 (en) 2004-05-27
EP1402176B1 (en) 2005-04-27
DE10130206A1 (en) 2003-02-06
KR20030023760A (en) 2003-03-19

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