WO2003002867A1 - Fuel injection valve - Google Patents
Fuel injection valve Download PDFInfo
- Publication number
- WO2003002867A1 WO2003002867A1 PCT/DE2002/001632 DE0201632W WO03002867A1 WO 2003002867 A1 WO2003002867 A1 WO 2003002867A1 DE 0201632 W DE0201632 W DE 0201632W WO 03002867 A1 WO03002867 A1 WO 03002867A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- fuel injection
- fuel
- injection valve
- cover cap
- valve seat
- Prior art date
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Classifications
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- 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
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- 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
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- 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
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- 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
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- 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
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- 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-ignited 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. Through a targeted injection of fuel through the injection holes, a jet-guided combustion process is implemented by forming a mixture cloud with at least one jet.
- a disadvantage of the fuel injector known from the above-mentioned document is, in particular, the coking of the spray openings, which thereby clog and reduce the flow through the fuel injection valve to an unacceptable extent. 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 the spray openings are shielded from the combustion chamber by a cap, so that the high temperatures of the mixture cloud blowing through do not reach the spray openings. As a result, the spray openings can be protected against wetting with fuel and the subsequent overgrowth.
- the cover cap can be produced simply and inexpensively as a bent sheet metal part by punching out and subsequent shaping.
- a further advantage is that the spray openings are indeed shielded from the combustion chamber temperature, but the fuel jets can enter through a generously sized opening in a final bottom of the cup-shaped cap unaffected in the 'combustion chamber.
- Lateral bores which are aligned with the spray openings, ensure an air flow to the spray openings, thereby wetting the
- Valve seat body in the area of the spray openings and subsequent deposits can be avoided.
- the number of holes corresponds to the number of spray openings.
- Fig. 1 shows a schematic section through a first embodiment of a fuel injector designed according to the invention in a
- Fig. 2 shows a schematic section through the spray-side part of the first exemplary embodiment of the invention shown in Fig. 1
- FIG. 3 shows a schematic section through a second exemplary embodiment of a fuel injector designed according to the invention in the same area as FIG. 2.
- Fig. 1 shows an exemplary embodiment of an embodiment according to the invention in a sectional view
- Fuel injector 1 is designed in the form of a fuel injector 1 for fuel injection systems of mixed end, spark ignition internal combustion engine.
- Fuel injection valve 1 is suitable for direct injection of fuel into a combustion chamber, not shown, 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 is, for example, via a weld 41 with a Ve tilschlußève 4 in operative connection 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 cup-shaped, for example, and its shape contributes to the valve needle guidance.
- the Ventilsitzkorper 5 is -einatled in a discharge-side recess 34 of the nozzle body 2 and is connected by a weld 35 'which Düsenk ⁇ rper. 2
- the nozzle body 2 is sealed by a seal 8 against an outer pole 9 of a solenoid 10 acting as an actuator for the valve needle 3.
- the magnet coil 10 is encapsulated in a coil housing 11 and wound on a coil carrier 12, which bears against an inner pole 13 of the magnet coil 10.
- the inner pole 13 and the outer pole 9 are separated from one another by a gap 26 and are supported on a connecting component 29.
- the magnet coil 10 is excited via a line 19 by an electrical current that can be supplied via an electrical plug contact 17.
- the plug contact 17 is surrounded by a plastic sheath 18, which can be molded onto the inner pole 13.
- valve needle 3 is guided in a valve needle guide 14, which is disc-shaped.
- a paired adjusting disk 15 is used for stroke adjustment.
- An armature 20 is located on the other side of the adjusting disk 15. This armature is non-positively connected to the valve needle 3 via a first flange 21 which is connected to the first flange 21 by a weld 22.
- a return spring 23 is supported, which in the present design of the fuel injection valve 1 is brought to a prestress by a sleeve 24.
- a second flange 31 is arranged on the outflow 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. Between the armature 20 and the second flange 31 is an elastic intermediate ring 32 for damping anchor bumpers when closing the fuel injection valve s
- 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 is provided at its downstream end 37 with a cover cap 38 which serves as a coking protection for the spray openings 7.
- the cover cap 38 shields the spray openings 7 against the high temperatures occurring when the mixture cloud injected into the combustion chamber of the internal combustion engine burns through.
- the downstream end 37 of the 'fuel injector 1 with the measures according to the invention is shown in detail in Fig. 2.
- the valve closing body 4 which is operatively connected to the valve needle 3, lifts off 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 detail designated II in FIG. 1 from the first exemplary embodiment of a fuel injector 1 designed according to the invention shown in FIG. 1.
- the fuel injection valve 1 has at its downstream end 37 a cover cap 38, which is fixed, for example by means of a weld seam 39, to the valve seat body 5 of the fuel injection valve 1.
- the cover cap 38 has an opening 40 which allows the fuel jets sprayed from the spray openings 7 to exit from the cover cap 38.
- the position and width of the opening 40 is chosen so that the fuel jet can pass through the opening 40 unaffected and the cap 38 is not wetted by fuel.
- the cap 38 is preferably hollow cylindrical with a bottom 41, in which the opening 40 is located, and is on a circumferential recess 42 of the Valve seat body 5 attached and fixed by means of the weld 39.
- the end base 41 of the cover cap 38 is preferably designed at a distance from the lower end face of the valve seat body 5.
- the coking of the spray openings 7 can be reduced by the arrangement of the cover cap 38 on the outflow side of the spray openings 7. Since the diameter of the spray openings 7 is typically approximately 100 ⁇ m, the risk that the spray openings 7 become clogged with coking over time and thus the flow rate is impermissibly restricted is relatively high. This is due in particular to the high temperatures when the mixture cloud injected into the combustion chamber burns through, since this causes components of the fuel to settle at the tip of the fuel injector 1. By attaching the cover cap 38, 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 cover cap 38, which thus takes on the function of flame protection, thereby prevents the flame front from spreading in the area between the cover cap 38 and the valve seat body 5.
- Fig. 3 shows a second embodiment shows in a partial sectional illustration of the invention designed according to the fuel injection valve 1 corresponding to the section shown '2. Corresponding to that in Fig. are provided for better orientation with identical reference numerals components.
- the cover cap 38 in the present second exemplary embodiment has lateral bores 43 which are introduced in the radial direction into the cover cap 38 and are aligned with the spray openings 7.
- the number of holes 43 corresponds to z. B. the number of spray openings 7.
- An air flow can be directed through the bores 43 to the spray openings 7, which ensures that no wetting by fuel occurs and any deposits on the valve seat body 5 in the area of the spray openings 7 are immediately removed by the air flow.
- the end base 41 of the cover cap 38 can be arched toward the valve seat support 5 against a spray direction of the fuel. As a result, the flow velocity of the air is increased, which creates a nozzle flow which ensures effective cleaning of the valve seat body 5 in the region of the spray openings 7.
- the invention is not limited to the exemplary embodiments shown and can be used for any construction of fuel injection valves 1.
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- 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, comprising an actuator, a valve needle (3) actuated by said actuator to actuate a valve closing body (4) that cooperates with a valve seat (6) configured on a valve seat body (5) to give a sealing seat, and a plurality of injection orifices (7) that are configured in the valve seat body (5). A cap (38) is disposed on an outlet-side end (37) of the fuel injection valve (1) and 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 Brennstoffeinspzritzsystem 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 ein 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-ignited 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 through the injection holes, a jet-guided combustion process is implemented by forming a mixture cloud with at least one jet.
Nachteilig an dem aus der obengenannten Druckschrift bekannten Brennstoffeinspritzventil ist insbesondere die Verkokung der Abspritzöffnungen, welche dadurch verstopfen und den Durchfluß durch das Brennstoffeinspxitzventil unzulässig stark vermindern. Dies führt zu . Fehl±unktionen der Brennkraftmaschine.
Vorteile der ErfindungA disadvantage of the fuel injector known from the above-mentioned document is, in particular, the coking of the spray openings, which thereby clog and reduce the flow through the fuel injection valve to an unacceptable extent. 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 die Abspritzöffnungen durch eine Abdeckkappe gegen den Brennraum abgeschirmt sind, so daß die hohen Temperaturen der durchbrennenden Gemischwolke die Abspritzöffnungen nicht erreichen. Dadurch können die Abspritzöffnungen vor Benetzung mit Brennstoff und dem nachfolgenden Zuwachsen geschützt werden.The fuel injector according to the invention with the characterizing features of the main claim has the advantage that the spray openings are shielded from the combustion chamber by a cap, so that the high temperatures of the mixture cloud blowing through do not reach the spray openings. As a result, the spray openings can be protected against wetting with fuel and the subsequent overgrowth.
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 die Abdeckkappe als Blechbiegeteil mittels Ausstanzen und nachfolgendem Formen einfach und kostengünstig herstellbar.Advantageously, the cover cap can be produced simply and inexpensively as a bent sheet metal part by punching out and subsequent shaping.
Weiterhin ist von Vorteil, daß die Abspritzöffnungen zwar vor der Brennraumtemperatur abgeschirmt sind, die Brennstoffstrahlen jedoch durch eine großzügig dimensionierte Öffnung in einem Abschlußboden der topfförmigen Abdeckkappe unbeeinflußt in den ' Brennraum eintreten können.A further advantage is that the spray openings are indeed shielded from the combustion chamber temperature, but the fuel jets can enter through a generously sized opening in a final bottom of the cup-shaped cap unaffected in the 'combustion chamber.
Seitliche Bohrungen, welche auf die Abspritzöffnungen ausgerichtet sind, sorgen für eine Luftströmung zu den Abspritzöffnungen, wodurch eine Benetzung desLateral bores, which are aligned with the spray openings, ensure an air flow to the spray openings, thereby wetting the
Ventilsitzkörpers im Bereich der Abspritzöffnungen und nachfolgende Ablagerungen vermieden werden können. DieValve seat body in the area of the spray openings and subsequent deposits can be avoided. The
Anzahl der Bohrungen entspricht dabei der Anzahl der Abspritzöffnungen.The number of holes corresponds to the number of spray openings.
Eine Aufwölbung des Abschlußbodens der Abdeckkappe inA bulge in the bottom of the cap in
Richtung auf den Ventil sitzkorper erhöht dieThe direction of the valve seat body increases
Strömungsgeschwindigkeit der Luft , so daß sich eine Düsenströmung ausbildet .
ZeichnungFlow speed of the air so that a jet flow is formed. drawing
Ausführungsbeispiele der Erfindung sind in der Zeichnung vereinfacht dargestellt und in der nachfolgenden Beschreibung näher erläutert. Es zeigen:Embodiments of the invention are 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 erstes Ausführungsbeispiel eines erfindungsgemäß ausgestalteten Brennstoffeinspritzventils in einerFig. 1 shows a schematic section through a first embodiment of a fuel injector designed according to the invention in a
Gesamtansicht ;Overall view ;
Fig. 2 einen schematischen Schnitt durch den abspritzseitigen Teil des in Fig. 1 dargestellten ersten AusführungsbeiSpiels des erfindungsgemäßenFig. 2 shows a schematic section through the spray-side part of the first exemplary embodiment of the invention shown in Fig. 1
Brennstoffeinspritzventils im Bereich II in Fig.Fuel injector in area II in Fig.
1 ,• und1, • and
Fig. 3 einen schematischen Schnitt durch eine zweites Ausführungsbeispiel eines erfindungsgemäß ausgestalteten Brennstoffeinspritzventils im gleichen Bereich wie Fig. 2.3 shows a schematic section through a second exemplary embodiment of a fuel injector designed according to the invention in the same area as FIG. 2.
Beschreibung der Aus führungsbei spieleDescription of execution examples
Fig . 1 zeigt in einer auszugsweisen Schnittdarstellung ein Ausführungsbeispiel eines erfindungsgemäßenFig. 1 shows an exemplary embodiment of an embodiment according to the invention in a sectional view
Brennstoff einspritzventils 1 . Das Brennstoff einspritzventil 1 ist in der Form eines Brennstoff einspritzventils 1 für Brennstoff einspritzanlagen von gemischvercdi cht enden, fremdgezündeten Brennkraf tmaschineh ausgeführt . DasFuel injector 1. The fuel injector 1 is designed in the form of a fuel injector 1 for fuel injection systems of mixed end, spark ignition internal combustion engine. The
Brennstoff einsprit zventil 1 eignet sich zum direkten Einsprit zen von Brennstoff in einen nicht dargestellten Brennraum einer Brennkraf tmaschine .Fuel injection valve 1 is suitable for direct injection of fuel into a combustion chamber, not shown, of an internal combustion engine.
Das Brennstof f einspritzventil 1 besteht aus einem Düsenkörper 2 , in welchem eine Ventilnadel 3 angeordnet ist . Die Ventilnadel 3 steht beispielsweise über eine Schweißnaht 41 mit einem Ve tilschließkörper 4 in Wirkverbindung, 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.The fuel injection valve 1 consists of a nozzle body 2, in which a valve needle 3 is arranged. The valve needle 3 is, for example, via a weld 41 with a Ve tilschlußkörper 4 in operative connection 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.
Der Ventilschließkörper 4 des erfindungsgemäß 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 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 topfförmig 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 Düsenkδrper 2 verbunden.The valve seat body 5 of the fuel injection valve 1 is cup-shaped, for example, and its shape contributes to the valve needle guidance. The Ventilsitzkorper 5 is -eingesetzt in a discharge-side recess 34 of the nozzle body 2 and is connected by a weld 35 'which Düsenkδrper. 2
Der Düsenkörper 2 ist durch eine Dichtung 8 gegen einen Außenpol 9 einer als Aktor für die Ventilnadel 3 wirkenden Magnetspule 10 abgedichtet. Die Magnetspule 10 ist in einem 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 einem Verbindungsbauteil 29 ab. Die Magnetspule 10 wird über eine 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.The nozzle body 2 is sealed by a seal 8 against an outer pole 9 of a solenoid 10 acting as an actuator for the valve needle 3. The magnet coil 10 is encapsulated in a coil housing 11 and wound on a coil carrier 12, which bears against an inner pole 13 of the magnet coil 10. The inner pole 13 and the outer pole 9 are separated from one another by a gap 26 and are supported on a connecting component 29. The magnet coil 10 is excited via a line 19 by an electrical current that can be supplied via an electrical plug contact 17. The plug contact 17 is surrounded by a plastic sheath 18, which can be molded onto the inner pole 13.
Die Ventilnadel 3 ist in einer Ventilnadel führung 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 kraf schlüssig 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 Brennstoff einspritzventils 1 durch eine Hülse 24 • auf Vorspannung gebracht wird .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 to the valve needle 3 via a first flange 21 which is connected to the first flange 21 by a weld 22. On the first flange 21, a return spring 23 is supported, which in the present design of the fuel injection valve 1 is brought to a prestress by a sleeve 24.
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 Brennstoff einsprit zventil sA second flange 31 is arranged on the outflow 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. Between the armature 20 and the second flange 31 is an elastic intermediate ring 32 for damping anchor bumpers when closing the fuel injection valve s
1 angeordnet .1 arranged.
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 Brennstoff zufuhr 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 ist das Brennstoffeinspritzventil 1 an seinem abstromseitigen Ende 37 mit einer Abdeckkappe 38 versehen, die für die Abspritzöffnungen 7 als Verkokungsschütz dient. Die Abdeckkappe 38 schirmt dabei die Abspritzöffnungen 7 gegen die beim Durchbrennen der in den Brennraum der Brennkraftmaschine eingespritzten Gemischwolke auftretenden hohen Temperaturen ab. Das abströmseitige Ende 37 des ' Brennstoffeinspritzventils 1 mit den erfindungsgemäßen Maßnahmen ist in Fig. 2 näher dargestellt.According to the invention, the fuel injection valve 1 is provided at its downstream end 37 with a cover cap 38 which serves as a coking protection for the spray openings 7. The cover cap 38 shields the spray openings 7 against the high temperatures occurring when the mixture cloud injected into the combustion chamber of the internal combustion engine burns through. The downstream end 37 of the 'fuel injector 1 with the measures according to the invention is shown in detail in Fig. 2.
Im Ruhezustand des Brennstoffeinspritzventils 1 wird der erste Flansch 21 an der Ventilnadel 3 von der RückstellfederIn the idle state of the fuel injector 1, the first flange 21 on the valve needle 3 is replaced by the return spring
23 entgegen einer Hubrichtung so beaufschlagt , daß der Ventilschließkörper 4 am Ventilsitz 6 in dichtender Anlage gehal-ten 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 Ventilsitzfläche 6 -ab, wodurch der Brennstoff an den Abspritzöffnungen 7 abgespritzt wird.23 acted against a stroke direction so that the valve closing body 4 is held at the valve seat 6 in sealing contact. The armature 20 rests on the intermediate ring 32, which is supported on the second flange 31. at Excitation of the magnetic coil 10 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 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 ersten Ausführungsbeispiel eines erfindungsgemäß ausgestalteten Brennstoffeinspritzventils 1.FIG. 2 shows an excerpted sectional illustration of the detail designated II in FIG. 1 from the first exemplary embodiment of a fuel injector 1 designed according to the invention shown in FIG. 1.
Wie bereits in Fig. 1 angedeutet, weist das Brennstoffeinspritzventil 1 an seinem abstromseitigen Ende 37 eine Abdeckkappe 38 auf, welche beispielsweise mittels einer Schweißnaht 39 an dem Ventilsitzkorper 5 des Brennstoffeinspritzventils 1 fixiert ist. Die Abdeckkappe 38 weist eine Öffnung 40 auf, welche den Austritt der aus den Abspritzδffnungen 7 abgespritzten Brennstoffstrahlen aus der Abdeckkappe 38 erlaubt. Die Lage und die Weite der Öffnung 40 ist dabei so gewählt, daß die Brennst offstrahlen unbeeinflußt durch die Öffnung 40 treten können und die Abdeckkappe 38 nicht von Brennstoff benetzt wird.As already indicated in FIG. 1, the fuel injection valve 1 has at its downstream end 37 a cover cap 38, which is fixed, for example by means of a weld seam 39, to the valve seat body 5 of the fuel injection valve 1. The cover cap 38 has an opening 40 which allows the fuel jets sprayed from the spray openings 7 to exit from the cover cap 38. The position and width of the opening 40 is chosen so that the fuel jet can pass through the opening 40 unaffected and the cap 38 is not wetted by fuel.
Die Abdeckkappe 38 ist vorzugsweise hohlzylindrisch mit einem Abschlußboden 41 ausgebildet, in dem sich die Öffnung 40 befindet ,_ und ist auf eine umlaufende Ausnehraung 42 des
Ventilsitzkörpers 5 aufgesteckt und mittels der Schweißnaht 39 fixiert. Der Abschlußboden 41 der Abdeckkappe 38 ist vorzugsweise von der unteren Stirnfläche des Ventilsitzkörpers 5 beabstandet ausgeführt.The cap 38 is preferably hollow cylindrical with a bottom 41, in which the opening 40 is located, and is on a circumferential recess 42 of the Valve seat body 5 attached and fixed by means of the weld 39. The end base 41 of the cover cap 38 is preferably designed at a distance from the lower end face of the valve seat body 5.
Durch die Anordnung der Abdeckkappe 38 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 Durchbrennen der in den Brennraum eingespritzten Gemischwolke bedingt, da sich dadurch Bestandteile des Brennstoffs an der Spitze des Brennstoffeinspritzventils 1 absetzen. Durch die Anbringung der Abdeckkappe 38 kann die Oberflächentemperatur im Austrittsbereich der Abspritzöffnungen 7 so weit reduziert werden, daß die Abspritzöffnungen 7 nicht durch Verkokungsrückstände zuwachsen können. Die Abdeσkkappe 38, welche somit die Funktion eines Flammschutzes übernimmt, verhindert dadurch die Ausbreitung der Flammfront im Bereich zwischen der Abdeckkappe 38 und dem Ventilsitzkorper 5.The coking of the spray openings 7 can be reduced by the arrangement of the cover cap 38 on the outflow side of the spray openings 7. Since the diameter of the spray openings 7 is typically approximately 100 μm, the risk that the spray openings 7 become clogged with coking over time and thus the flow rate is impermissibly restricted is relatively high. This is due in particular to the high temperatures when the mixture cloud injected into the combustion chamber burns through, since this causes components of the fuel to settle at the tip of the fuel injector 1. By attaching the cover cap 38, 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 cover cap 38, which thus takes on the function of flame protection, thereby prevents the flame front from spreading in the area between the cover cap 38 and the valve seat body 5.
Fig. 3 zeigt in einer ausschnittsweisen Schnittdarstellung ein zweites Ausführungsbeispiel eines erfindungsgemäß ausgestalteten Brennstoffeinspritzventils 1. Der dargestellte Ausschnitt entspricht', demjenigen in Fig. 2. Übereinstimmende Bauteile sind zur besseren Orientierung mit übereinstimmenden Bezugszeichen versehen.Fig. 3 shows a second embodiment shows in a partial sectional illustration of the invention designed according to the fuel injection valve 1 corresponding to the section shown '2. Corresponding to that in Fig. Are provided for better orientation with identical reference numerals components.
Zur Verbesserung der M ßnahmen zur Vermeidung von Verkokungsrückständen weist die Abdeckkappe 38 im vorliegenden zweiten Ausführungsbeispiel seitliche Bohrungen 43 auf, die in radialer Richtung in die Abdeckkappe 38 eingebracht und auf die Abspritzöffnungen 7 ausgerichtet sind. Die Anzahl der Bohrungen 43 entspricht dabei z. B. der Anzahl der Abspritzöffnungen 7.
Durch die Bohrungen 43 kann gezielt eine Luftströmung zu den Abspritzöffnungen 7 geleitet werden, welche dafür sorgt, daß eine Benetzung durch Brennstoff unterbleibt und eventuell auftretende Ablagerungen am Ventilsitzkorper 5 im Bereich der Abspritzöffnungen 7 durch den Luftström sofort abtransportiert werden.To improve the measures to avoid coking residues, the cover cap 38 in the present second exemplary embodiment has lateral bores 43 which are introduced in the radial direction into the cover cap 38 and are aligned with the spray openings 7. The number of holes 43 corresponds to z. B. the number of spray openings 7. An air flow can be directed through the bores 43 to the spray openings 7, which ensures that no wetting by fuel occurs and any deposits on the valve seat body 5 in the area of the spray openings 7 are immediately removed by the air flow.
Zur weiteren Unterstützung der Luftströmung kann der Abschlußboden 41 der Abdeckkappe 38 entgegen einer Abspritzrichtung des Brennstoffs auf den Ventilsitzträger 5 hin aufgewölbt sein. Dadurch wird die Strömungsgeschwindigkeit der Luft erhöht, wodurch eine Düsenströmung entsteht, welche für eine effektive Reinigung des Ventilsitzkörpers 5 im Bereich der Abspritzöff ungen 7 sorgt.To further support the air flow, the end base 41 of the cover cap 38 can be arched toward the valve seat support 5 against a spray direction of the fuel. As a result, the flow velocity of the air is increased, which creates a nozzle flow which ensures effective cleaning of the valve seat body 5 in the region of the spray openings 7.
Die Erfindung ist nicht auf die dargestellten Ausführungsbeispiele beschränkt und für beliebige Bauweisen von Brennstoffeinspritzventilen 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
1. Brennstoffeinspritzventil (1) für1. Fuel injector (1) for
Brennstoffeinspritzanlagen von Brennkraftmaschinen zur direkten Einspritzung von Brennstoff in einen Brennraum mit einem Aktor (10) , einer von dem Aktor (10) betätigbaren Ventilnadel (3) zur Betätigung eines Ventilschließkörpers (4) , der zusammen mit einer an einem Ventilsitzkorper (5) ausgebildeten Ventilsitzfläche (6) einen Dichtsitz bildet, und mehreren Abspritzöffnungen (7) , die in dem Ventilsitzkorper (5) ausgebildet sind, dadurch, gekennzeichnet, daß an einem abstromseitigen - Ende (37) des. Brennstoffeinspritzventils (1) eine Abdeckkappe (38) angeordnet ist, welche die Abspritzöffnungen (7) gegen den Brennraum der Brennkraftmaschine abschirmt .Fuel injection systems of internal combustion engines for direct injection of fuel into a combustion chamber with an actuator (10), a valve needle (3) which can be actuated by the actuator (10) for actuating a valve closing body (4) and which together with a valve seat surface formed on a valve seat body (5) (6) forms a sealing seat and a plurality of spray openings (7) which are formed in the valve seat body (5), characterized in that a cover cap (38) is arranged on an outflow-side end (37) of the fuel injection valve (1) , which shields the spray openings (7) against the combustion chamber of the internal combustion engine.
2. Brennstoffeinspritzventil nach Anspruch 1, dadurch gekennzeichnet, daß die Abdeckkappe (38) hohlzylindrisch ausgeführt ist und einen Abschlußboden (41) aufweist.2. Fuel injection valve according to claim 1, characterized in that the cover cap (38) is hollow-cylindrical and has an end plate (41).
3. Brennstoffeinspritzventil nach Anspruch 2, dadurch gekennzeichnet, daß in dem Abschlußboden (41) eine Öffnung (40) ausgebildet ist . 3. Fuel injection valve according to claim 2, characterized in that an opening (40) is formed in the end plate (41).
4. Brennstoffeinspritzventil. nach Anspruch 3, dadurch gekennzeichnet, daß die Öffnung (40) so angeordnet ist, daß Brennstoffstrahlen, die die Abspritzöffnungen (7) verlassen, unbeeinflußt durch die Öffnung (40) in den Brennraum eintreten.4. Fuel injector. according to claim 3, characterized in that the opening (40) is arranged so that fuel jets, which leave the spray openings (7), enter the combustion chamber unaffected by the opening (40).
5. Brennstoffeinspritzventil nach einem der Ansprüche 1 bis '4, dadurch gekennzeichnet, daß die Abdeckkappe (38) seitliche radiale Bohrungen (43) aufweist .5. Fuel injection valve according to one of claims 1 to ' 4, characterized in that the cover cap (38) has lateral radial bores (43).
6. Brennstoffeinspritzventil nach Anspruch 5, dadurch gekennzeichnet, daß die Anzahl der Bohrungen (43) der Anzahl der Abspritzö fnungen (7) entspricht.6. A fuel injector according to claim 5, characterized in that the number of bores (43) corresponds to the number of openings (7).
7. Brennstoffeinspritzventil nach Anspruch 5 oder 6, dadurch gekennzeichnet, daß die Bohrungen (43) auf die Abspritzöffnungen (7) ausgerichtet sind.7. Fuel injection valve according to claim 5 or 6, characterized in that the bores (43) are aligned with the spray openings (7).
8. Brennstoffeinspritzventil nach einem der Ansprüche 2 bis 4, dadurch gekennzeichnet, daß der Abschlußboden (41) entgegen einer Abspritzrichtung des Brennstoffs auf den Ventilsitzkorper (5) hin aufgewölbt ist .8. Fuel injection valve according to one of claims 2 to 4, characterized in that the end plate (41) is bulged against an injection direction of the fuel on the valve seat body (5).
9. Brennstoffeinspritzventil nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, daß die Abdeckkappe (38) in eine umlaufende Ausnehmung (42) des Ventilsitzkörpers (5) eingesetzt ist.9. Fuel injection valve according to one of claims 1 to 8, characterized in that the cover cap (38) is inserted into a circumferential recess (42) of the valve seat body (5).
10. Brennstoffeinspritzventil nach einem der Ansprüche 1 bis10. Fuel injection valve according to one of claims 1 to
9, dadurch gekennzeichnet, daß die Abdeckkappe (38) mit dem Ventilsitzkorper (5) mittels einer Schweißnaht (39) verbunden ist.9, characterized, that the cover cap (38) is connected to the valve seat body (5) by means of a weld seam (39).
11. Brennstoffeinspritzventil nach einem der Ansprüche 1 bis 10, dadurch gekennzeichnet, daß die Abdeckkappe (38) mittels Stanzen und Biegen herstellbar ist .11. Fuel injection valve according to one of claims 1 to 10, characterized in that the cover cap (38) can be produced by means of stamping and bending.
12. Brennstoffeinspritzventil nach einem der Ansprüche 2, 3 oder 8 , dadurch gekennzeichnet, daß der Abschlußboden (41 ) der Abdeckkappe ( 38 ) von der unteren Stirnfläche des Ventilsitzkörpers ( 5 ) beabstandet ausgeführt ist . 12. Fuel injection valve according to one of claims 2, 3 or 8, characterized in that the end base (41) of the cover cap (38) from the lower end face of the valve seat body (5) is spaced.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2001130684 DE10130684A1 (en) | 2001-06-26 | 2001-06-26 | Fuel injector |
DE10130684.9 | 2001-06-26 |
Publications (1)
Publication Number | Publication Date |
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WO2003002867A1 true WO2003002867A1 (en) | 2003-01-09 |
Family
ID=7689444
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DE2002/001632 WO2003002867A1 (en) | 2001-06-26 | 2002-05-07 | Fuel injection valve |
Country Status (2)
Country | Link |
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DE (1) | DE10130684A1 (en) |
WO (1) | WO2003002867A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1559903A1 (en) * | 2004-01-28 | 2005-08-03 | Siemens VDO Automotive S.p.A. | Fuel injector with deformable needle |
EP2775133A1 (en) * | 2013-03-06 | 2014-09-10 | Delphi Automotive Systems Luxembourg SA | Protection mean for the nozzle of an injector |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102015206854A1 (en) * | 2014-07-10 | 2016-01-14 | Continental Teves Ag & Co. Ohg | Valve seat carrier |
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DE3113466A1 (en) * | 1981-04-03 | 1982-10-14 | Klöckner-Humboldt-Deutz AG, 5000 Köln | Method for fixing a cap on a nozzle body |
US4862857A (en) * | 1988-02-12 | 1989-09-05 | Outboard Marine Corporation | Fuel injection system for multi cylinder two-stroke engine |
JPH03264767A (en) * | 1990-03-15 | 1991-11-26 | Japan Electron Control Syst Co Ltd | Fuel injector |
DE4104020A1 (en) * | 1991-02-09 | 1992-08-13 | Bosch Gmbh Robert | DEVICE FOR INJECTING A FUEL-GAS MIXTURE |
US5273215A (en) * | 1990-06-21 | 1993-12-28 | Robert Bosch Gmbh | Fuel injection valve |
US5540387A (en) * | 1993-04-20 | 1996-07-30 | Robert Bosch Gmbh | Device for injecting a fuel/gas mixture |
EP0844386A1 (en) * | 1996-11-26 | 1998-05-27 | Robert Bosch Gmbh | Device for injecting a mixture of fuel and gas |
DE19804463A1 (en) | 1998-02-05 | 1999-08-12 | Daimler Chrysler Ag | Fuel injector nozzle with multiple orifices for a diesel engine |
DE10059420A1 (en) * | 2000-11-30 | 2002-06-06 | Bosch Gmbh Robert | Fuel injector |
-
2001
- 2001-06-26 DE DE2001130684 patent/DE10130684A1/en not_active Withdrawn
-
2002
- 2002-05-07 WO PCT/DE2002/001632 patent/WO2003002867A1/en not_active Application Discontinuation
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DE3113466A1 (en) * | 1981-04-03 | 1982-10-14 | Klöckner-Humboldt-Deutz AG, 5000 Köln | Method for fixing a cap on a nozzle body |
US4862857A (en) * | 1988-02-12 | 1989-09-05 | Outboard Marine Corporation | Fuel injection system for multi cylinder two-stroke engine |
JPH03264767A (en) * | 1990-03-15 | 1991-11-26 | Japan Electron Control Syst Co Ltd | Fuel injector |
US5273215A (en) * | 1990-06-21 | 1993-12-28 | Robert Bosch Gmbh | Fuel injection valve |
DE4104020A1 (en) * | 1991-02-09 | 1992-08-13 | Bosch Gmbh Robert | DEVICE FOR INJECTING A FUEL-GAS MIXTURE |
US5540387A (en) * | 1993-04-20 | 1996-07-30 | Robert Bosch Gmbh | Device for injecting a fuel/gas mixture |
EP0844386A1 (en) * | 1996-11-26 | 1998-05-27 | Robert Bosch Gmbh | Device for injecting a mixture of fuel and gas |
DE19804463A1 (en) | 1998-02-05 | 1999-08-12 | Daimler Chrysler Ag | Fuel injector nozzle with multiple orifices for a diesel engine |
DE10059420A1 (en) * | 2000-11-30 | 2002-06-06 | Bosch Gmbh Robert | Fuel injector |
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Title |
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PATENT ABSTRACTS OF JAPAN vol. 016, no. 082 (M - 1215) 27 February 1992 (1992-02-27) * |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1559903A1 (en) * | 2004-01-28 | 2005-08-03 | Siemens VDO Automotive S.p.A. | Fuel injector with deformable needle |
WO2005075812A1 (en) * | 2004-01-28 | 2005-08-18 | Siemens Vdo Automotive Spa | Fluid injector with deformable needle |
US8662420B2 (en) | 2004-01-28 | 2014-03-04 | Continental Automotive Italy S.P.A. | Valve body and fluid injector with a valve body |
EP2775133A1 (en) * | 2013-03-06 | 2014-09-10 | Delphi Automotive Systems Luxembourg SA | Protection mean for the nozzle of an injector |
Also Published As
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DE10130684A1 (en) | 2003-02-06 |
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