DE102006003668A1 - Fuel injection valve with outward opening nozzle needle e.g. for fuel injection valves, has longitudinal hole nozzle body and outward opening having nozzle needle which is movably provided in longitudinal hole - Google Patents

Fuel injection valve with outward opening nozzle needle e.g. for fuel injection valves, has longitudinal hole nozzle body and outward opening having nozzle needle which is movably provided in longitudinal hole Download PDF

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Publication number
DE102006003668A1
DE102006003668A1 DE200610003668 DE102006003668A DE102006003668A1 DE 102006003668 A1 DE102006003668 A1 DE 102006003668A1 DE 200610003668 DE200610003668 DE 200610003668 DE 102006003668 A DE102006003668 A DE 102006003668A DE 102006003668 A1 DE102006003668 A1 DE 102006003668A1
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DE
Germany
Prior art keywords
fuel injection
nozzle needle
longitudinal hole
injection valve
nozzle
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.)
Withdrawn
Application number
DE200610003668
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German (de)
Inventor
Gerald Seywald
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.)
Bayerische Motoren Werke AG
Original Assignee
Bayerische Motoren Werke AG
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Publication date
Application filed by Bayerische Motoren Werke AG filed Critical Bayerische Motoren Werke AG
Priority to DE200610003668 priority Critical patent/DE102006003668A1/en
Publication of DE102006003668A1 publication Critical patent/DE102006003668A1/en
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/04—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00 having valves, e.g. having a plurality of valves in series
    • F02M61/08—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 the valves opening in direction of fuel flow
    • 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
    • F02M61/166—Selection of particular materials
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
    • F02M61/18—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for
    • F02M61/1806—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for characterised by the arrangement of discharge orifices, e.g. orientation or size
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
    • F02M61/18—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for
    • F02M61/1893—Details of valve member ends not covered by groups F02M61/1866 - F02M61/188
    • 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
    • F02M2200/02—Fuel-injection apparatus having means for reducing wear
    • 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
    • F02M2200/16—Sealing of fuel injection apparatus 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
    • F02M2200/26—Fuel-injection apparatus with elastically deformable elements other than coil springs
    • 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
    • F02M2200/90—Selection of particular materials
    • F02M2200/9053—Metals

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)

Abstract

The valve has a longitudinal hole (12) nozzle body (10) and an outward opening having a nozzle needle (16) which is movably provided in the longitudinal hole. The holes have conically expandable seat face ends (14). The needle has a conical pinhead (20) whose conical exterior surface (22) in a closing position seals the valve with the conical seat face of the nozzle body and separated from the opening seat face of the valve. The pinhead is provided in such a way that the conical exterior surface is flexibly ductile with the stationary closing forces arising in a valve closing position.

Description

Die Erfindung betrifft ein Brennstoffeinspritzventil gemäß dem Oberbegriff des Anspruchs 1.The The invention relates to a fuel injection valve according to the preamble of claim 1.

Ein gattungsgemäßes Einspritzventil ist beispielsweise aus der DE 102 59 799 A1 bekannt.A generic injection valve is for example from the DE 102 59 799 A1 known.

Ein Problem bei solchen Brennstoffeinspritzventilen mit nach außen öffnender Düsennadel besteht darin, dass bereits geringe Verunreinigungen im Brennstoff, die sich an der Sitzfläche oder der Gegenfläche der Düsennadel ablagern, oder ein geringer Verschleiß ausreicht, um ein nicht vollständiges Schließen des Einspritzventils herbeizuführen.One Problem with such fuel injection valves with outward opening nozzle needle is that even small impurities in the fuel, attached to the seat or the counter surface the nozzle needle Depositing, or a little wear is sufficient to not fully close the Bring in injection valve.

Der Erfindung liegt die Aufgabe zugrunde, ein gattungsgemäßes Brennstoffeinspritzventil derart weiterzubilden, dass auch nach langem Gebrauch ein zuverlässiges Schließen des Einspritzventils gewährleistet ist, dessen Düsennadel üblicherweise durch eine Feder in Schließstellung vorgespannt ist.Of the Invention is based on the object, a generic fuel injector in such a way that even after long use, a reliable closing of Injector ensured is, whose nozzle needle usually by a spring in the closed position is biased.

Diese Aufgabe wird mit einem Brennstoffeinspritzventil gemäß dem Anspruch 1 gelöst.These Task is with a fuel injection valve according to the claim 1 solved.

Durch die erfindungsgemäß in einem gewissen Ausmaß elastisch nachgiebige Ausbildung der konischen Außenfläche des Kopfes der Düsennadel wird die Dichtfunktion des Einspritzventils verbessert, wobei kleine Verunreinigungen an den gegeneinander abdichtenden Flächen oder Verschleiß in gewissem Ausmaß kompensiert werden können.By the invention in one elastic to some extent yielding formation of the conical outer surface of the head of the nozzle needle is the sealing function of the injector improved, with small Contaminants on the surfaces sealing against each other or Wear in compensated to a certain extent can be.

Die Unteransprüche sind auf vorteilhafte Ausführungsformen und Weiterbildungen des erfindungsgemäßen Brennstoffeinspritzventils gerichtet.The under claims are on advantageous embodiments and further developments of the fuel injection valve according to the invention directed.

Die Erfindung wird im Folgenden anhand einer schematischen Zeichnung beispielsweise und mit weiteren Einzelheiten erläutert.The Invention will be described below with reference to a schematic drawing for example, and explained in more detail.

Die einzige Figur stellt einen Querschnitt durch den düsenseitigen Endbereich eines in seinem Aufbau an sich bekannten Brennstoffeinspritzventils dar.The single figure represents a cross section through the nozzle side End region of a known per se in its construction fuel injection valve.

In einem Düsenkörper 10 mit insgesamt zylindrischer Gestalt ist eine Längsbohrung 12 ausgebildet, die sich am Stirnende des Düsenkörpers 10 konisch aufweitet und dort eine Sitzfläche 14 bildet. Der Konuswinkel der Sitzfläche 14 ist mit γ bezeichnet. In der Längsbohrung 12 ist eine Düsennadel in an sich bekannter Weise beweglich geführt, die beispielsweise von einer nicht dargestellten Schließfeder gemäß der Figur nach oben gedrängt wird. Die Düsennadel 16, die gegenüber dem Durchmesser der Längsbohrung 12 mit Untermaß ausgebildet ist, so dass sie von einem Ringraum 18 umgeben ist, endet in einem Nadelkopf 20, dessen Außenfläche 22 sich konisch aufweitet und eine Gegenfläche zur Sitzfläche 14 bildet, die durch die Vorspannung der Düsennadel 16 in Schließrichtung in dichtende Anlage an die Sitzfläche 14 gedrängt ist. Das Stirnende der Düsennadel 16 ist konkav mit einer Ausnehmung 24 ausgeformt, so dass der Nadelkopf 20 eine konische Ringwand 26 bildet.In a nozzle body 10 with a generally cylindrical shape is a longitudinal bore 12 formed, located at the front end of the nozzle body 10 conically widens and there is a seat 14 forms. The cone angle of the seat 14 is denoted by γ. In the longitudinal bore 12 a nozzle needle is movably guided in a conventional manner, which is urged, for example, by a closing spring, not shown, according to the figure upwards. The nozzle needle 16 opposite to the diameter of the longitudinal bore 12 formed with undersize, so that they are from an annulus 18 surrounded, ends in a needle head 20 , its outer surface 22 flares conically and a counter surface to the seat 14 forms, by the bias of the nozzle needle 16 in the closing direction in sealing contact with the seat 14 is urged. The front end of the nozzle needle 16 is concave with a recess 24 shaped so that the needle head 20 a conical ring wall 26 forms.

Die Tiefe t der Ausnehmung 24 ist vorzugsweise derart, dass die Ringwand 26 ausgehend von ihrem freien Ende zunächst eine konstante Dicke d hat, die an der Wurzel der Ringwand zunimmt. Der Boden der Ausnehmung 24 ist beispielsweise sphärisch gewölbt.The depth t of the recess 24 is preferably such that the annular wall 26 starting from its free end initially has a constant thickness d, which increases at the root of the ring wall. The bottom of the recess 24 is, for example, spherically curved.

Die Dicke d der Ringwand 26 und deren Anbindung an den Schaft der Düsennadel 16 ist derart an die von einer nicht dargestellten Schließfeder aufgebrachten Schließkraft der Düsennadel 16 angepasst, dass sich die konische Ringwand 26 gegenüber der dargestellten Stellung, bei der beim Schließen des Ventils noch keine dichtende Anlage zwischen der Außenfläche 22 und der Sitzfläche 14 besteht, geringfügig elastisch verformt, d.h., dass der Konuswinkel der Außenfläche 22 etwas abnimmt oder sich die Ringwand 26 in sich verformt.The thickness d of the ring wall 26 and their connection to the shaft of the nozzle needle 16 is so applied to the force applied by a closing spring, not shown closing force of the nozzle needle 16 adapted that the conical ring wall 26 relative to the position shown, when closing the valve still no sealing contact between the outer surface 22 and the seat 14 exists, slightly elastically deformed, ie, that the cone angle of the outer surface 22 something decreases or the ring wall 26 deformed in itself.

Vorzugsweise ist der Konuswinkel der Außenfläche 22 im geöffneten Zustand des Ventils etwas größer als der Konuswinkel der Sitzfläche 14, so dass die dichtende Anlage vom freien Ende der Außenfläche 22 bzw. der Sitzfläche 14 aus erfolgt. Beispielsweise beträgt der Konuswinkel der Sitzfläche 14 44° und der der Außenfläche der Düsennadel 45°, solange diese nicht am Sitz anliegt. Die elastische Verformbarkeit der Ringwand 26 ist vorzugsweise derart, dass auch im geschlossenen Zustand des Ventils der Konuswinkel der Außenfläche 22 der Ringwand 26 geringfügig größer bleibt als der Konuswinkel der Sitzfläche 14 oder sich an diesen annähert.Preferably, the cone angle of the outer surface 22 in the opened state of the valve slightly larger than the cone angle of the seat 14 so that the sealing abutment from the free end of the outer surface 22 or the seat 14 out. For example, the cone angle of the seat 14 44 ° and the outer surface of the nozzle needle 45 °, as long as it does not rest on the seat. The elastic deformability of the ring wall 26 is preferably such that even in the closed state of the valve, the cone angle of the outer surface 22 the ring wall 26 slightly larger than the cone angle of the seat 14 or approaching them.

Die Funktion des Ventils ist an sich bekannt. Die Düsennadel 16 wird von einer nicht dargestellten Schließfeder in dichtender Anlage am Sitz gehalten und von einem Aktor, beispielsweise einem Piezoaktor, gegen die Kraft der Schließfeder geöffnet, so dass im Ringraum 18 befindlicher, unter Druck stehender Brennstoff durch den entstehenden Ringspalt abgegeben wird. Je nach Konstruktion des Einspritzventils kann dessen Öffnen und/oder dessen Schließen durch Hydraulikdruck unterstützt werden.The function of the valve is known per se. The nozzle needle 16 is held by a closing spring, not shown, in sealing engagement with the seat and opened by an actuator, such as a piezoelectric actuator, against the force of the closing spring, so that in the annulus 18 The pressurized fuel is discharged through the resulting annular gap. Depending on the design of the injection valve whose opening and / or its closing can be supported by hydraulic pressure.

Im dargestellten Beispiel setzt die Stirnfläche der Ringwand 26 die freie Stirnfläche des Düsenkörpers 10 bei offenem Ventil etwa stetig fort. Dies ist für das Abspritzen von Vorteil.In the example shown, the end face of the annular wall sets 26 the free end face of the nozzle body 10 when the valve is open about steadily. This is for the cumshot advantage.

Es versteht sich, dass die Übergänge zwischen den aksparallelen, zylindrischen Begrenzungsflächen des Ringraums 18 zu der Sitzfläche 14 und der Außenfläche 22 im Hinblick auf gute Strömungsverhältnisse gerundet sind. Die Ausformung der Ringwand bzw. der Ausnehmung 24 wird vorteilhafterweise mit Hilfe an sich bekannter Finite Elemente Berechnungen derart berechnet, dass die erwünschte elastische Verformbarkeit der Außenfläche 22 der Düsennadel 16 gegeben ist. Dabei kann sich als vorteilhaft erweisen, dass die konkave Stirnfläche der Düsennadel insgesamt sphärisch ist, wobei die Dicke der konischen Ringwand von deren freiem Ende her kontinuierlich zunehmen oder zunächst abnehmen und dann zunehmen kann. Die Düsennadel besteht beispielsweise aus rostfreiem Stahl. Die in gegenseitige Berührung kommenden Flächen sind gehärtet und geschliffen.It is understood that the transitions between the parallel, cylindrical limbs surfaces of the annulus 18 to the seat 14 and the outer surface 22 are rounded in terms of good flow conditions. The shape of the annular wall or the recess 24 is advantageously calculated by means of known per se finite element calculations such that the desired elastic deformability of the outer surface 22 the nozzle needle 16 given is. It may prove to be advantageous that the concave end face of the nozzle needle is spherical as a whole, wherein the thickness of the conical annular wall continuously increase from the free end or first decrease and then increase. The nozzle needle is made of stainless steel, for example. The surfaces coming into mutual contact are hardened and ground.

1010
Düsenkörpernozzle body
1212
Längsbohrunglongitudinal bore
1414
Sitzflächeseat
1616
Düsennadelnozzle needle
1818
Ringraumannulus
2020
Nadelkopfpinhead
2222
Außenflächeouter surface
2424
Ausnehmungrecess
2626
Ringwandring wall

Claims (4)

Brennstoffeinspritzventil mit einem mit einer Längsbohrung (12) ausgebildeten Düsenkörper (10) und einer in der Längsbohrung beweglich geführten, nach außen öffnenden Düsennadel (16), wobei die Längsbohrung in einer sich konisch aufweitenden Sitzfläche (14) endet und die Düsennadel in einem sich konisch aufweitenden Nadelkopf (20) endet, dessen konische Außenfläche (22) in Schließstellung des Ventils in dichtender Anlage an der konischen Sitzfläche des Düsenkörpers ist und in Offenstellung des Ventils von der Sitzfläche beabstandet ist, dadurch gekennzeichnet, dass der Nadelkopf (20) derart ausgebildet ist, dass seine konische Außenfläche (22) bei den in Schließstellung des Ventils auftretenden stationären Schließkräften elastisch verformbar ist.Fuel injection valve with one with a longitudinal bore ( 12 ) formed nozzle body ( 10 ) and in the longitudinal bore movably guided, outwardly opening nozzle needle ( 16 ), wherein the longitudinal bore in a conically widening seat ( 14 ) and the nozzle needle in a conically widening needle head ( 20 ) whose conical outer surface ( 22 ) is in the closed position of the valve in sealing engagement with the conical seat surface of the nozzle body and in the open position of the valve is spaced from the seat surface, characterized in that the needle head ( 20 ) is formed such that its conical outer surface ( 22 ) is elastically deformable at the stationary closing forces occurring in the closed position of the valve. Brennstoffeinspritzventil nach Anspruch 1, dadurch gekennzeichnet, dass die freie Stirnfläche des Nadelkopfes (20) konkav ausgebildet ist.Fuel injection valve according to claim 1, characterized in that the free end face of the needle head ( 20 ) is concave. Brennstoffeinspritzventil nach Anspruch 2, dadurch gekennzeichnet, dass der Nadelkopf (20) eine sich konisch aufweitende Ringwand (26) bildet.Fuel injection valve according to claim 2, characterized in that the needle head ( 20 ) a conically widening annular wall ( 26 ). Brennstoffeinspritzventil nach Anspruch 3, dadurch gekennzeichnet, dass die Wandstärke der Ringwand (26) zumindest in einem Teil des Bereiches, in dem ihre Außenfläche die Sitzfläche überlappt, etwa konstant ist.Fuel injection valve according to claim 3, characterized in that the wall thickness of the annular wall ( 26 ) Is approximately constant at least in a part of the area in which its outer surface overlaps the seat.
DE200610003668 2006-01-26 2006-01-26 Fuel injection valve with outward opening nozzle needle e.g. for fuel injection valves, has longitudinal hole nozzle body and outward opening having nozzle needle which is movably provided in longitudinal hole Withdrawn DE102006003668A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE200610003668 DE102006003668A1 (en) 2006-01-26 2006-01-26 Fuel injection valve with outward opening nozzle needle e.g. for fuel injection valves, has longitudinal hole nozzle body and outward opening having nozzle needle which is movably provided in longitudinal hole

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE200610003668 DE102006003668A1 (en) 2006-01-26 2006-01-26 Fuel injection valve with outward opening nozzle needle e.g. for fuel injection valves, has longitudinal hole nozzle body and outward opening having nozzle needle which is movably provided in longitudinal hole

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DE102006003668A1 true DE102006003668A1 (en) 2007-08-02

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DE200610003668 Withdrawn DE102006003668A1 (en) 2006-01-26 2006-01-26 Fuel injection valve with outward opening nozzle needle e.g. for fuel injection valves, has longitudinal hole nozzle body and outward opening having nozzle needle which is movably provided in longitudinal hole

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Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE837195C (en) * 1944-02-24 1952-04-21 Kloeckner Humboldt Deutz Ag Open injection valve for internal combustion engines
DE2517682A1 (en) * 1975-04-22 1976-11-04 Daimler Benz Ag INJECTION VALVE FOR COMBUSTION MACHINERY
DE2618135A1 (en) * 1975-04-26 1976-11-11 Ntn Toyo Bearing Co Ltd FUEL INJECTION VALVE AND METHOD OF MANUFACTURING THE SAME
DE3617015A1 (en) * 1986-05-21 1987-11-26 Bosch Gmbh Robert Fuel injection valve with soft seat
DE69115376T2 (en) * 1990-01-26 1996-07-11 Orbital Eng Australia FUEL INJECTION NOZZLE
DE19547169A1 (en) * 1995-12-16 1997-06-19 Bosch Gmbh Robert Fuel injection valve for internal combustion engines
DE10232693A1 (en) * 2002-07-18 2004-02-05 Siemens Ag Fuel injection valve, for an IC motor, has structured outer surfaces for the valve housing and the closed valve plate to give a smooth surface over the dividing line which is free of steps/edges to prevent the entry of burned fuel residue
DE10331266A1 (en) * 2003-07-10 2005-03-24 Robert Bosch Gmbh Fuel injector

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE837195C (en) * 1944-02-24 1952-04-21 Kloeckner Humboldt Deutz Ag Open injection valve for internal combustion engines
DE2517682A1 (en) * 1975-04-22 1976-11-04 Daimler Benz Ag INJECTION VALVE FOR COMBUSTION MACHINERY
DE2618135A1 (en) * 1975-04-26 1976-11-11 Ntn Toyo Bearing Co Ltd FUEL INJECTION VALVE AND METHOD OF MANUFACTURING THE SAME
DE3617015A1 (en) * 1986-05-21 1987-11-26 Bosch Gmbh Robert Fuel injection valve with soft seat
DE69115376T2 (en) * 1990-01-26 1996-07-11 Orbital Eng Australia FUEL INJECTION NOZZLE
DE19547169A1 (en) * 1995-12-16 1997-06-19 Bosch Gmbh Robert Fuel injection valve for internal combustion engines
DE10232693A1 (en) * 2002-07-18 2004-02-05 Siemens Ag Fuel injection valve, for an IC motor, has structured outer surfaces for the valve housing and the closed valve plate to give a smooth surface over the dividing line which is free of steps/edges to prevent the entry of burned fuel residue
DE10331266A1 (en) * 2003-07-10 2005-03-24 Robert Bosch Gmbh Fuel injector

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