DE19963389A1 - Method of manufacturing a valve piece for a fuel injector - Google Patents

Method of manufacturing a valve piece for a fuel injector

Info

Publication number
DE19963389A1
DE19963389A1 DE1999163389 DE19963389A DE19963389A1 DE 19963389 A1 DE19963389 A1 DE 19963389A1 DE 1999163389 DE1999163389 DE 1999163389 DE 19963389 A DE19963389 A DE 19963389A DE 19963389 A1 DE19963389 A1 DE 19963389A1
Authority
DE
Germany
Prior art keywords
valve piece
bore
valve
bores
drillings
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.)
Ceased
Application number
DE1999163389
Other languages
German (de)
Inventor
Siegfried Ruthardt
Holger Rapp
Uwe Grytz
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
Priority to DE1999163389 priority Critical patent/DE19963389A1/en
Priority to PCT/DE2000/004297 priority patent/WO2001048371A1/en
Publication of DE19963389A1 publication Critical patent/DE19963389A1/en
Ceased 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
    • F02M47/00—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure
    • F02M47/02—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure of accumulator-injector type, i.e. having fuel pressure of accumulator tending to open, and fuel pressure in other chamber tending to close, injection valves and having means for periodically releasing that closing pressure
    • F02M47/027—Electrically actuated valves draining the chamber to release the closing pressure
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
    • F02M61/18—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for
    • F02M61/1806—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for characterised by the arrangement of discharge orifices, e.g. orientation or size
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
    • F02M61/18—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for
    • F02M61/1806—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for characterised by the arrangement of discharge orifices, e.g. orientation or size
    • F02M61/1833—Discharge orifices having changing cross sections, e.g. being divergent
    • 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
    • F02M2200/28—Details of throttles in fuel-injection apparatus
    • 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
    • F02M2200/80—Fuel injection apparatus manufacture, repair or assembly
    • F02M2200/8046—Fuel injection apparatus manufacture, repair or assembly the manufacture involving injection moulding, e.g. of plastic or metal
    • 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
    • F02M2547/00—Special features for fuel-injection valves actuated by fluid pressure
    • F02M2547/003—Valve inserts containing control chamber and valve piston

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Manufacturing & Machinery (AREA)
  • Fuel-Injection Apparatus (AREA)

Abstract

A method for production of a valve piece (10) for a fuel injection unit, in particular for a common rail injector, is described, whereby the valve piece (10) comprises drillings (12-15), especially throttling drillings (15). The invention is characterised in that the valve piece (10), including the drillings and throttling drillings (15), is prepared by metal injection moulding and finally brought to target strength and hardness by sintering.

Description

Stand der TechnikState of the art

Die Erfindung bezieht sich auf ein Verfahren nach dem Oberbegriff des Patentan­ spruchs 1.The invention relates to a method according to the preamble of the patent saying 1.

Zum Stand der Technik werden beispielsweise die EP 0 569 655 A1 und die EP 0 749 365 B1 genannt.For example, EP 0 569 655 A1 and US Pat Called EP 0 749 365 B1.

Nach herkömmlicher Fertigungstechnik ist es bekannt, das Ventilstück eines CR- Injektors (CR = Common Rail) durch spanabhebende Bearbeitung eines aus einem geeigneten metallischen Werkstoff bestehenden Rohlings herzustellen. Vorbohrungen zu den eigentlichen Drosselbohrungen werden entsprechend span­ abhebend durch Bohren eingebracht. Die eigentlichen Durchflussbohrungen von Zu- und Ablaufdrossel werden erodiert. Anschließend wird der Durchfluss hydroerosiv gerundet. Die komplexen Bohrungskonturen werden also nach derzeitigem Stand der Technik in mehreren Schritten und mit unterschiedlichen aufeinanderfolgenden Verfahrens- und Bearbeitungsschritten auf unterschiedlichen Maschinen hergestellt.According to conventional manufacturing technology, it is known that the valve piece of a CR Injector (CR = Common Rail) by machining one out of one to produce a suitable metallic material from the existing blank. Pre-bores for the actual throttle bores are machined accordingly introduced by drilling. The actual flow holes from Inlet and outlet throttle are eroded. Then the flow hydroerosively rounded. The complex bore contours are thus reduced the current state of the art in several steps and with different successive process and processing steps on different Machines manufactured.

Perfekte Koaxialität der Bohrungen zueinander bzw. für die Injektorfunktion günstige Bohrungsformen (Konizität der Oberfläche) sind auf diese Weise nicht sicher realisierbar. Die Gründe für diese Unvolkommenheiten der Bohrungen liegen zum einen in Spannfehlern, ferner in begrenzten Freiheitsgraden bei dem Bestreben, die gewünschte Bohrungskontur durch Erodieren der Vorbohrung zu schaffen. Fehlerquellen sind des weiteren auch in einem unerwünschten Aus­ weichen der Elektroden begründet: Elektrodenschwingen führt zu breiter Fertigungsstreuung. Perfect coaxiality of the holes to each other or for the injector function In this way, favorable hole shapes (conicity of the surface) are not can be implemented safely. The reasons for this hole inconsistency are on the one hand in clamping errors, and also in limited degrees of freedom with the Strive to get the desired hole contour by eroding the pilot hole create. Sources of error are also in an undesirable out justified the electrodes: Electrode swing leads to wider Manufacturing spread.  

Aufgabe der Erfindung ist es, geeignete Maßnahmen zur Vermeidung der Bohrungsunzulänglichkeiten bei der Herstellung von Ventilstücken der in Rede stehenden Art zu treffen.The object of the invention is to take suitable measures to avoid Hole shortcomings in the manufacture of valve pieces in Kind of meeting.

Vorteile der ErfindungAdvantages of the invention

Gemäß der Erfindung wird die Aufgabe bei einem Verfahren der eingangs be­ zeichneten Gattung durch die kennzeichnenden Maßnahmen des Patentanspruchs 1 gelöst.According to the invention, the object is in a method of the beginning distinguished genus by the characterizing measures of the claim 1 solved.

Vorteilhafte Weiterbildungen des Grundgedankens der Erfindung enthalten die Patentansprüche 2-4.Advantageous developments of the basic idea of the invention contain the Claims 2-4.

Durch den erfindungsgemäßen Einsatz des MIM-Verfahrens (= Metal Injection Molding) bei der Herstellung des gesamten Ventilstückes, einschließlich der Ablauf- und der Zulauf-Drosselbohrung, läßt sich eine wesentliche Verbesserung der Koaxialitäten der genannten Bohrungen zueinander sowie eine Erhöhung des Freiheitsgrades bezüglich der Möglichkeiten der Bohrungskonturen, insbe­ sondere der Konturen der Drosselbohrungen, erzielen. Damit ist eine funktions­ gerechte Gestaltung der Microgeometrie derartiger Ventilstücke bzw. Bohrungen gewährleistet. Die Koaxialitäten der einzelnen Bohrungsabschnitte zueinander können - bedingt durch den erfindungsgemäßen Einsatz des MIM-Verfahrens - sehr genau sein. Der Genauigkeitsgrad bestimmt sich hierbei durch die Exaktheit des Spritzwerkzeuges.Through the use of the MIM method (= metal injection Molding) in the manufacture of the entire valve piece, including the drain and the inlet throttle bore, can be a significant improvement in Coaxialities of the bores mentioned to each other and an increase in Degree of freedom regarding the possibilities of the bore contours, esp special of the contours of the throttle bores. So that is a functional fair design of the micro geometry of such valve pieces or bores guaranteed. The coaxialities of the individual bore sections to each other can - due to the use of the MIM method according to the invention - be very precise. The degree of accuracy is determined by the Accuracy of the injection mold.

Herstellungsbedingte Toleranzeinflüsse lassen sich vorteilhafterweise sehr klein halten. Durch entsprechende Werkzeuggestaltung ist es möglich, sowohl konische Diffusorbohrungen als auch Dämpfungskegel zum Steuerraum dar­ zustellen.Manufacturing-related tolerance influences can be very advantageous keep it small. With appropriate tool design, it is possible to both conical diffuser holes as well as damping cones to the control room to deliver.

Durchgeführte Voruntersuchungen haben ergeben, dass sich derartige Bohrungs­ formen vorteilhaft auf die Injektorfunktion bei niedrigen Drücken (P < 230 bar) sowie bezüglich linearem Verlauf der Einspritzmenge, dargestellt über der Dauer des Ansteuervorgangs, verhalten. Preliminary investigations have shown that such drilling advantageously shape the injector function at low pressures (P <230 bar) and with respect to the linear course of the injection quantity, plotted over the duration of the control process.  

Zeichnungendrawings

Zur Veranschaulichung der Wirkungsweise des erfindungsgemäßen Verfahrens ist in der Zeichnung ein Ausführungsbeispiel dargestellt, das im folgenden detailliert beschrieben wird. Es zeigt:To illustrate the mode of operation of the method according to the invention an embodiment is shown in the drawing, the following is described in detail. It shows:

Fig. 1 eine Ausführungsform eines Ventilstücks für einen sogenannten CR-Injektor, im Längsschnitt, Fig. 1 shows an embodiment of a valve piece for a so-called CR-injector, in longitudinal section,

Fig. 2 die Einzelheit "X" aus Fig. 1, in gegenüber Fig. 1 vergrößerter Darstellung, und Fig. 2 shows the detail "X" from Fig. 1, in an enlarged view compared to Fig. 1, and

Fig. 3 die Einzelheit "Y" aus Fig. 1, in gegenüber Fig. 1 und 2 nochmals vergrößerter Darstellung. Fig. 3 shows the detail "Y" from Fig. 1, in an enlarged view compared to Figs. 1 and 2.

Beschreibung des AusführungsbeispielsDescription of the embodiment

Das in Fig. 1 in seiner Gesamtheit dargestellte Ventilstück ist mit 10 be­ zeichnet. Es besitzt - konzentrisch zu seiner Längsachse 11 - mehrere Bohrungen 12, 13, 14 und 15, die koaxial zueinander angeordnet sind, jedoch unterschied­ liche Durchmesser aufweisen und gegeneinander abgesetzt sind. Ventilstück 10 und Bohrungen 12-15 sind im sogenannten MIM-Verfahren (MIM = Metal Injection Molding) durch Spritzgießen gefertigt und anschließend auf Endfestigkeit und -härte gesintert worden. Der in den Brennraum des Zylinders einer Brennkraft­ maschine (nicht gezeigt) einzuspritzende Kraftstoff gelangt zunächst in eine Bohrung 12, die in eine Führungsbohrung 13 geringfügig vergrößerten Durch­ messers übergeht. Die Führungsbohrung 13, welche zweckmäßigerweise durch Innenschleifen nachbearbeitet werden kann, mündet in einen konischen Ventilsitz 16 und eine Ventilauflage 17 aus (siehe insbesondere Fig. 2). Ventilsitz 16 und -auflage 17 lassen sich in für den jeweiligen Anwendungszweck geeigneter Weise durch Schleifen nachbearbeiten. The valve piece shown in its entirety in Fig. 1 is marked with 10 be. It has - concentrically to its longitudinal axis 11 - a plurality of bores 12 , 13 , 14 and 15 which are arranged coaxially with one another, but have different diameters and are offset from one another. Valve piece 10 and bores 12-15 are manufactured in the so-called MIM process (MIM = Metal Injection Molding) by injection molding and then sintered for ultimate strength and hardness. The fuel to be injected into the combustion chamber of the cylinder of an internal combustion engine (not shown) first enters a bore 12 which passes into a guide bore 13 with a slightly enlarged diameter. The guide bore 13 , which can expediently be reworked by internal grinding, opens into a conical valve seat 16 and a valve support 17 (see in particular FIG. 2). Valve seat 16 and seat 17 can be reworked in a manner suitable for the respective application by grinding.

Ventilsitz 16 und -auflage 17 bilden zugleich einen Absatz für den Übergang der Führungsbohrung 13 in die Bohrung 14, die gegenüber der Führungs­ bohrung 13 einen stark reduzierten Durchmesser besitzt. Der Übergang von der Führungsbohrung 13 in die Bohrung 14 gestaltet sich über einen konischen Bohrungsabschnitt 18, der einen Konuswinkel α von 40° oder im wesentlichen 40° besitzt (siehe insbesondere Fig. 2).Valve seat 16 and support 17 also form a shoulder for the transition of the guide bore 13 into the bore 14 , which has a greatly reduced diameter compared to the guide bore 13 . The transition from the guide bore 13 into the bore 14 takes place via a conical bore section 18 which has a cone angle α of 40 ° or essentially 40 ° (see in particular FIG. 2).

Die Bohrung 14 schließlich geht über einen Absatz 19 in eine insgesamt mit 15 bezifferte Drosselbohrung über (siehe insbesondere Fig. 3), deren Druch­ messer gegenüber dem Durchmesser der Bohrung 14 nochmals stark ver­ ringert ist: Während die Bohrung 14 einen Durchmesser von etwa 1 mm auf­ weist, beträgt der Durchmesser der Drosselbohrung 15 nurmehr ca. 0,25 mm. Wie insbesondere aus Fig. 3 erkennbar ist, unterteilt sich die Drosselbohrung 15 in einen zylindrischen Abschnitt 21 der Länge a und einen leicht konischen Abschnitt 22 der Länge b auf, wobei sich der Abschnitt 22 in Strömungs­ richtung 23 unmittelbar an den Abschnitt 21 anschließt. Die Drosselbohrung 15, 21, 22 mündet schließlich, wie Fig. 1 deutlich macht, in eine konische Diffusor­ bohrung bzw. Dämpfungskegel 24 zum (nicht dargestellten) Steuerraum aus. Die endgültige Form der Drosselbohrung 15 hinsichtlich funktionsgerechter Gestaltung der Microgeometrie (Rundung des Durchflusses bzw. der Durchmesser­ übergänge etc.) wird durch hydroerosive Schleifbearbeitung erreicht.Finally, the bore 14 passes over a shoulder 19 into a throttle bore with a total of 15 (see in particular FIG. 3), the diameter of which is again greatly reduced compared to the diameter of the bore 14 : while the bore 14 has a diameter of approximately 1 mm has, the diameter of the throttle bore 15 is only about 0.25 mm. As can be seen in particular from FIG. 3, the throttle bore 15 is divided into a cylindrical section 21 of length a and a slightly conical section 22 of length b, section 22 connecting directly to section 21 in flow direction 23 . The throttle bore 15 , 21 , 22 finally opens, as shown in FIG. 1, in a conical diffuser bore or damping cone 24 to the control chamber (not shown). The final shape of the throttle bore 15 with regard to the functional design of the micro geometry (rounding of the flow or the diameter transitions etc.) is achieved by hydroerosive grinding.

Claims (4)

1. Verfahren zur Herstellung eines Ventilstücks (10) für eine Kraftstoff- Einspritzvorrichtung, insbesondere für einen CR-Injektor (CR = Common Rail), wobei das Ventilstück (10) Bohrungen (12-15), vornehmlich Drosselbohrungen (15), aufweist, dadurch gekennzeichnet, dass das Ventilstück (10), einschl. der Bohrungen (12-15) bzw. Drosselbohrungen (15), durch MIM-Spritzgießen (MIM = Metal Injection Molding) gefertigt und anschließend auf Endfestigkeit und -härte gesintert wird.1. A method for producing a valve piece ( 10 ) for a fuel injection device, in particular for a CR injector (CR = Common Rail), the valve piece ( 10 ) having bores ( 12-15 ), primarily throttle bores ( 15 ), characterized in that the valve piece ( 10 ), including the bores ( 12-15 ) or throttle bores ( 15 ), is manufactured by MIM injection molding (MIM = Metal Injection Molding) and then sintered for ultimate strength and hardness. 2. Verfahren nach Anspruch 1, wobei das Ventilstück (10) eine Führungs­ bohrung (13) aufweist, dadurch gekennzeichnet, dass die Führungsbohrung (13) durch Innenschleifen nachbearbeitet wird.2. The method of claim 1, wherein the valve piece (10) has a guide bore (13), characterized in that the guide bore (13) is post-processed by internal grinding. 3. Verfahren nach Anspruch 1 oder 2, wobei das Ventilstück (10) einen Ventilsitz (16) und eine Ventilauflage (17) besitzt, dadurch gekennzeichnet, dass Ventilsitz (16) und -auflage (17) durch Schleifen nachbearbeitet werden.3. The method according to claim 1 or 2, wherein the valve piece ( 10 ) has a valve seat ( 16 ) and a valve support ( 17 ), characterized in that the valve seat ( 16 ) and support ( 17 ) are reworked by grinding. 4. Verfahren nach Anspruch 1, 2 oder 3, dadurch gekennzeichnet, dass die Drosselbohrungen (15) durch hydroerosives Schleifen auf Durchfluss nachbe­ arbeitet werden.4. The method according to claim 1, 2 or 3, characterized in that the throttle bores ( 15 ) are worked by hydroerosive grinding to flow through.
DE1999163389 1999-12-28 1999-12-28 Method of manufacturing a valve piece for a fuel injector Ceased DE19963389A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE1999163389 DE19963389A1 (en) 1999-12-28 1999-12-28 Method of manufacturing a valve piece for a fuel injector
PCT/DE2000/004297 WO2001048371A1 (en) 1999-12-28 2000-12-02 Method for production of a valve piece for a fuel injection unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1999163389 DE19963389A1 (en) 1999-12-28 1999-12-28 Method of manufacturing a valve piece for a fuel injector

Publications (1)

Publication Number Publication Date
DE19963389A1 true DE19963389A1 (en) 2001-07-05

Family

ID=7934757

Family Applications (1)

Application Number Title Priority Date Filing Date
DE1999163389 Ceased DE19963389A1 (en) 1999-12-28 1999-12-28 Method of manufacturing a valve piece for a fuel injector

Country Status (2)

Country Link
DE (1) DE19963389A1 (en)
WO (1) WO2001048371A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006021274A1 (en) * 2004-08-26 2006-03-02 Schaeffler Kg Powder-metallurgical (mim) cam follower for the valve train of an internal combustion engine
WO2007005632A1 (en) * 2005-06-30 2007-01-11 Brp Us Inc. Fuel injector nozzle manufacturing method
WO2015010805A1 (en) * 2013-07-25 2015-01-29 Robert Bosch Gmbh Control valve for a fuel injector

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090014561A1 (en) * 2007-07-15 2009-01-15 General Electric Company Components capable of transporting liquids manufactured using injection molding
DE102008044096A1 (en) 2008-11-27 2010-06-02 Robert Bosch Gmbh Method for producing throttle bores with a low caviation transfer point
EP2199593B1 (en) * 2008-12-17 2011-06-15 Magneti Marelli S.p.A. Method for producing the sealing seat with injection holes of a fuel injector
DE102016203261A1 (en) * 2016-02-29 2017-08-31 Robert Bosch Gmbh Method for producing a bore, component and fuel injector

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60119363A (en) * 1983-11-30 1985-06-26 Keihin Seiki Mfg Co Ltd Fuel injection valve
EP0569655B1 (en) 1992-05-11 1996-01-24 New Sulzer Diesel AG Injection nozzle for a fuel injection device
DE4230376C1 (en) * 1992-09-11 1993-04-22 Robert Bosch Gmbh, 7000 Stuttgart, De
DE69502277T2 (en) 1994-03-10 1998-09-10 Man B & W Diesel A/S, Kopenhagen/Koebenhavn METHOD FOR PRODUCING A NOZZLE FOR FUEL VALVE AND NOZZLE
US5427319A (en) * 1994-03-24 1995-06-27 Siemens Automotive L.P. Fuel injector armature assembly
JPH0979114A (en) * 1995-09-14 1997-03-25 Hino Motors Ltd Manufacture of fuel injection nozzle for diesel engine
US6378792B2 (en) * 1998-04-10 2002-04-30 Aisan Kogyo Kabushiki Kaisha Fuel injection nozzle

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006021274A1 (en) * 2004-08-26 2006-03-02 Schaeffler Kg Powder-metallurgical (mim) cam follower for the valve train of an internal combustion engine
WO2007005632A1 (en) * 2005-06-30 2007-01-11 Brp Us Inc. Fuel injector nozzle manufacturing method
WO2015010805A1 (en) * 2013-07-25 2015-01-29 Robert Bosch Gmbh Control valve for a fuel injector
KR20160034407A (en) * 2013-07-25 2016-03-29 로베르트 보쉬 게엠베하 Control valve for a fuel injector

Also Published As

Publication number Publication date
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