EP1156209A2 - Guiding device for high pressure hydraulic systems - Google Patents

Guiding device for high pressure hydraulic systems Download PDF

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Publication number
EP1156209A2
EP1156209A2 EP01111698A EP01111698A EP1156209A2 EP 1156209 A2 EP1156209 A2 EP 1156209A2 EP 01111698 A EP01111698 A EP 01111698A EP 01111698 A EP01111698 A EP 01111698A EP 1156209 A2 EP1156209 A2 EP 1156209A2
Authority
EP
European Patent Office
Prior art keywords
structuring
control elements
guide surface
guide
elements according
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP01111698A
Other languages
German (de)
French (fr)
Other versions
EP1156209A3 (en
Inventor
Wolfgang Bloching
Andreas Dr. Fath
Peter Hubl
Wendelin Kluegl
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.)
Siemens AG
Original Assignee
Siemens AG
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 Siemens AG filed Critical Siemens AG
Publication of EP1156209A2 publication Critical patent/EP1156209A2/en
Publication of EP1156209A3 publication Critical patent/EP1156209A3/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Withdrawn legal-status Critical Current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
    • F02M61/10—Other injectors with elongated valve bodies, i.e. of needle-valve type
    • F02M61/12—Other injectors with elongated valve bodies, i.e. of needle-valve type characterised by the provision of guiding or centring means for valve bodies
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14

Definitions

  • the invention relates to control elements for high-pressure hydraulic systems, especially according to the preamble of the claim 1.
  • common rail injection systems In contrast to conventional injection systems, common rail injection systems have a quasi-stationary, high pressure at the injector, which corresponds to the peak pressure of conventional injection systems.
  • a valve control piston for controlling the valve needle is added to the injector of the common rail injection systems, both of which are sealed against a leakage space by a gap seal. Constantly high pressure on twice the number of gap seals results in large amounts of leakage, which have a negative impact on the overall efficiency of the common rail injection system.
  • this leakage is controlled by the smallest possible guide clearance of 1.5 to 2.5 ⁇ m between the valve needle and the valve body or valve control piston and the injector and by the largest possible guide length (> 10 mm) of the guide of the valve needle and valve spool.
  • the guide clearance is limited by manufacturing limits and by lubrication requirements and the guide length by the dimensions of the injector.
  • the invention has for its object the leakage of the injector to minimize a common rail injection system.
  • the task is solved by the characteristic features of claim 1.
  • the structuring for manufacturing reasons primarily on the moving guide surfaces is applied, causes a turbulent flow in the sealing gap, which an increased pressure drop in the same and thus reduced leakage.
  • by structuring the flow length that the leakage flow must flow through significantly increased. In this way the effective gap length becomes larger than the guide length, so that the leakage is reduced.
  • the moving guide surfaces have a carbon coating, with its selective Application at the same time structuring the moving Guide surfaces are carried out.
  • the carbon layer diminishes Friction and wear of the sliding guide surfaces.
  • the carbon can be targeted using appropriate masks be applied to the guide surfaces. The not coated Areas then form the desired structure is mapped on the guide surfaces without additional effort.
  • valve needle 1 shows a valve needle 1 with a needle guide 2 and a needle seat 3.
  • the needle guide 2 has a guide surface 4 with a structure.
  • the valve needle 1 is guided by a second, immovable guide surface 8, which is formed on the housing of the injection valve.
  • the structuring according to the invention works as follows:
  • the fuel pressure acting on a shoulder 6 of the valve needle 1 causes an axial leakage oil flow along the needle guide 2 in the sealing gap. This meets a circumferential transverse flow in the passages of the flat thread 5.
  • the turbulent flow that occurs leads to an increased pressure drop in the sealing gap and thus to a reduced leakage oil flow.
  • At least partially a guide surface has a coating, for example reduces friction and / or abrasion.
  • a coating for example reduces friction and / or abrasion.
  • the structuring at least partially from the Coating built up.
  • only the webs are made from the coating between the grooves.
  • the entire guide surface 4, 8 with the coating be covered.
  • a Material used that is at least partially carbon consists.
  • the guide surface 4 is preferably with a carbon layer 7 coated.
  • the structuring is designed as a carbon layer, so that the structuring when applying the carbon layer is applied to the guide surface 4.
  • the structuring with the carbon layer can also be based on the immobile guide surface 8, which is the movable guide surface 4 is assigned.
  • the structuring on the movable and the immovable guide surface 4, 8 formed.
  • the structuring also in the form of recesses of any surface and / or depth and number.
  • the structuring only has to perform the task of causing a leakage flow to occur between one flows along the first and second guide surfaces 4, 8 longer flow path and / or a more turbulent flow path than having to travel with flat guide surfaces.

Abstract

The control element has a sealing gap defined between stationary and movable cylindrical guide surfaces (4,8) of a valve needle guide (2) and a valve housing, the movable guide surface provided with a surface structure, e.g. parallel peripheral grooves or a flat thread extending over the full length of the guide surface. A carbon coating can be applied to the surface structure.

Description

Die Erfindung betrifft Steuerelemente für Hochdruckhydraulikanlagen, insbesondere nach dem Oberbegriff des Patentanspruchs 1.The invention relates to control elements for high-pressure hydraulic systems, especially according to the preamble of the claim 1.

Bei Common-Rail-Einspritzsystemen liegt im Gegensatz zu konventionellen Einspritzsystemen ein quasi stationärer, hoher Druck am Injektor an, der dem Spitzendruck konventioneller Einspritzsysteme entspricht. Erschwerend kommt hinzu, dass beim Injektor der Common-Rail-Einspritzsysteme zusätzlich zur Ventilnadel des Einspritzventils ein Ventilsteuerkolben zur Steuerung der Ventilnadel hinzu kommt, die beide durch eine Spaltdichtung gegenüber einem Leckageraum abgedichtet sind. Konstanter hoher Druck auf die doppelte Anzahl von Spaltdichtungen haben hohe Leckagemengen zur Folge, die sich negativ auf den Gesamtwirkungsgrad des Common-Rail-Einspritzsystems auswirken. Bisher wird diese Leckage durch ein möglichst kleines Führungsspiel von 1,5 bis 2,5 µm zwischen Ventilnadel und Ventilkörper bzw. Ventilsteuerkolben und Injektorkörper und durch eine möglichst große Führungslänge (> 10 mm) der Führung von Ventilnadel und Ventilsteuerkolben bekämpft. Das Führungsspiel ist jedoch durch Fertigungsgrenzen und durch Erfordernisse der Schmierung und die Führungslänge durch die Abmessungen des Injektors begrenzt.In contrast to conventional injection systems, common rail injection systems have a quasi-stationary, high pressure at the injector, which corresponds to the peak pressure of conventional injection systems. To make matters worse, in addition to the valve needle of the injection valve, a valve control piston for controlling the valve needle is added to the injector of the common rail injection systems, both of which are sealed against a leakage space by a gap seal. Constantly high pressure on twice the number of gap seals results in large amounts of leakage, which have a negative impact on the overall efficiency of the common rail injection system. Previously, this leakage is controlled by the smallest possible guide clearance of 1.5 to 2.5 μ m between the valve needle and the valve body or valve control piston and the injector and by the largest possible guide length (> 10 mm) of the guide of the valve needle and valve spool. However, the guide clearance is limited by manufacturing limits and by lubrication requirements and the guide length by the dimensions of the injector.

Der Erfindung liegt die Aufgabe zugrunde, die Leckage des Injektors eines Common-Rail-Einspritzsystems zu minimieren.The invention has for its object the leakage of the injector to minimize a common rail injection system.

Die Aufgabe wird gelöst durch die kennzeichnenden Merkmale des Patentanspruchs 1. Die Strukturierung, die aus Fertigungsgründen in erster Linie auf die bewegten Führungsflächen appliziert wird, bewirkt eine turbulente Strömung im Dichtspalt, die einen verstärkten Druckabfall in demselben und damit eine verringerte Leckage zur Folge hat. Zusätzlich wird durch die Strukturierung die Strömungslänge, die der Leckagestrom durchströmen muss, deutlich erhöht. Auf diese Weise wird die effektive Spaltlänge größer als die Führungslänge, so dass die Leckage reduziert ist.The task is solved by the characteristic features of claim 1. The structuring for manufacturing reasons primarily on the moving guide surfaces is applied, causes a turbulent flow in the sealing gap, which an increased pressure drop in the same and thus reduced leakage. In addition, by structuring the flow length that the leakage flow must flow through, significantly increased. In this way the effective gap length becomes larger than the guide length, so that the leakage is reduced.

Wenn als Strukturierung parallele Umfangsnuten vorgesehen sind, bilden sich durch die im Dichtspalt vorhandene, axiale Strömung innerhalb der Umfangsnuten kräftige Wirbel, die die Energie der Spaltströmung vermindern und den erwünschten Druckabfall bewirken.If parallel circumferential grooves are provided as structuring are formed by the axial in the sealing gap Flow within the circumferential grooves strong vortices that the Reduce the energy of the gap flow and the desired Cause pressure drop.

Dieser Effekt tritt besonders dann ein, wenn die Strukturierung als flachgängiges Gewinde ausgebildet ist. Dann wird die axiale Strömung des Dichtspalts durch eine umfangsgerichtete Strömung des Gewindes überlagert und die Turbulenzen und somit der Druckabfall im Dichtspalt vergrößert. Dabei ist der lokale Druckabfall im Gewindegang selbst relativ gering, er wird jedoch durch die große Länge des Gewindegangs ausgeglichen. Weiterhin folgt ein Großteil der Strömung dem Gewinde, so dass die Strömungsstrecke im Dichtspalt verlängert ist.This effect occurs especially when the structuring is designed as a flat thread. Then the axial flow of the sealing gap through a circumferential Flow of the thread overlaps and the turbulence and thus the pressure drop in the sealing gap increases. Here is the local pressure drop in the thread itself relatively low, he is compensated for by the large length of the thread. Furthermore, a large part of the flow follows the thread, so that the flow path in the sealing gap is extended.

Ein weiterer Vorteil des flachgängigen Gewindes ist seine einfache Fertigung.Another advantage of the flat thread is its simple manufacturing.

Durch die Ausdehnung der Strukturierung auf die gesamte Führungslänge wird der oben beschriebene Effekt maximal genutzt.By extending the structuring to the entire length of the guide the effect described above is used to the maximum.

Von Vorteil ist auch, dass zumindest die bewegten Führungsflächen eine Kohlenstoffbeschichtung aufweisen, mit deren selektiver Aufbringung zugleich die Strukturierung der bewegten Führungsflächen erfolgt. Die Kohlenstoffschicht vermindert Reibung und Verschleiß der aufeinandergleitenden Führungsflächen. Durch entsprechende Masken kann der Kohlenstoff gezielt auf die Führungsflächen aufgebracht werden. Die nicht beschichteten Flächen bilden dann die gewünschte Struktur, die ohne Mehraufwand auf den Führungsflächen abgebildet wird. It is also advantageous that at least the moving guide surfaces have a carbon coating, with its selective Application at the same time structuring the moving Guide surfaces are carried out. The carbon layer diminishes Friction and wear of the sliding guide surfaces. The carbon can be targeted using appropriate masks be applied to the guide surfaces. The not coated Areas then form the desired structure is mapped on the guide surfaces without additional effort.

Im Folgenden wird die Erfindung anhand der Zeichnung beispielhaft erläutert.In the following, the invention is exemplified with reference to the drawing explained.

Es zeigen:

  • Fig. 1 eine Ventilnadel mit einer strukturierten Führungsfläche;
  • Fig. 1A einen vergrößerten Ausschnitt Y aus der Führungsfläche von Fig. 1.
    • Show it:
  • 1 shows a valve needle with a structured guide surface;
  • 1A shows an enlarged detail Y from the guide surface of FIG. 1.

    • Die Fig. 1 zeigt eine Ventilnadel 1 mit einer Nadelführung 2 und einem Nadelsitz 3. Die Nadelführung 2 weist eine Führungsfläche 4 mit einer Strukturierung auf. Die Ventilnadel 1 ist von einer zweiten, unbeweglichen Führungsfläche 8 geführt, die am Gehäuse des Einspritzventils ausgebildet ist.1 shows a valve needle 1 with a needle guide 2 and a needle seat 3. The needle guide 2 has a guide surface 4 with a structure. The valve needle 1 is guided by a second, immovable guide surface 8, which is formed on the housing of the injection valve.

    Aus Fig. 1A, die einen vergrößerten Ausschnitt Y aus der Führungsfläche 4 darstellt, ist ersichtlich, dass es sich bei der Strukturierung um ein flachgängiges Gewinde 5 handelt. Dieses erstreckt sich über die gesamte Länge der Führungsfläche 4.1A, which shows an enlarged detail Y from the guide surface 4, it can be seen that it is the structuring is a flat thread 5. This extends over the entire length of the guide surface 4th

    Die erfindungsgemäße Strukturierung wirkt folgendermaßen:
    Der auf eine Schulter 6 der Ventilnadel 1 wirkende Kraftstoffdruck verursacht im Dichtspalt eine axiale Leckölströmung entlang der Nadelführung 2. Diese trifft in den Gängen des flachgängigen Gewindes 5 auf eine umfangsgerichtete Querströmung. Die dabei auftretende turbulente Strömung führt zu einem erhöhten Druckabfall im Dichtspalt und dadurch zu einer verringerten Leckölströmung.    The structuring according to the invention works as follows:
    The fuel pressure acting on a shoulder 6 of the valve needle 1 causes an axial leakage oil flow along the needle guide 2 in the sealing gap. This meets a circumferential transverse flow in the passages of the flat thread 5. The turbulent flow that occurs leads to an increased pressure drop in the sealing gap and thus to a reduced leakage oil flow.

    In einer vorteilhaften Ausführungsform weist mindestens teilweise eine Führungsfläche eine Beschichtung auf, die beispielsweise die Reibung und/oder den Abrieb reduziert. Vorzugsweise ist die Strukturierung mindestens teilweise aus der Beschichtung aufgebaut. In an advantageous embodiment, at least partially a guide surface has a coating, for example reduces friction and / or abrasion. Preferably is the structuring at least partially from the Coating built up.

    In einer Ausführungsform sind beispielsweise nur die Stege zwischen den Nuten aus der Beschichtung gefertigt. Jedoch kann auch die gesamte Führungsfläche 4, 8 mit der Beschichtung bedeckt sein. Als Beschichtung wird beispielsweise ein Material verwendet, das mindestens teilweise aus Kohlenstoff besteht.In one embodiment, for example, only the webs are made from the coating between the grooves. However can also the entire guide surface 4, 8 with the coating be covered. For example, a Material used that is at least partially carbon consists.

    Vorzugsweise ist die Führungsfläche 4 mit einer Kohlenstoffschicht 7 beschichtet. In einer bevorzugten Ausführungsform ist die Strukturierung als Kohlenstoffschicht ausgebildet, so dass die Strukturierung beim Aufbringen der Kohlenstoffschicht auf die Führungsfläche 4 aufgebracht ist.The guide surface 4 is preferably with a carbon layer 7 coated. In a preferred embodiment the structuring is designed as a carbon layer, so that the structuring when applying the carbon layer is applied to the guide surface 4.

    Die Strukturierung mit der Kohlenstoffschicht kann auch auf der unbeweglichen Führungsfläche 8 aufgebracht sein, die der beweglichen Führungsfläche 4 zugeordnet ist.The structuring with the carbon layer can also be based on the immobile guide surface 8, which is the movable guide surface 4 is assigned.

    In einer bevorzugten Ausführungsform sind die Strukturierungen auf der beweglichen und der unbeweglichen Führungsfläche 4, 8 ausgebildet.In a preferred embodiment, the structuring on the movable and the immovable guide surface 4, 8 formed.

    In einer einfachen Ausführungsform kann die Strukturierung auch in Form von Ausnehmungen beliebiger Fläche und/oder Tiefe und Anzahl ausgebildet sein. Die Strukturierung hat nur die Aufgabe zu erfüllen, dass ein Leckagestrom, der zwischen der ersten und zweiten Führungsfläche 4, 8 entlangströmt eine längeren Strömungsweg und/oder einen turbulenteren Strömungsweg als bei planen Führungsflächen zurücklegen muss.In a simple embodiment, the structuring also in the form of recesses of any surface and / or depth and number. The structuring only has to perform the task of causing a leakage flow to occur between one flows along the first and second guide surfaces 4, 8 longer flow path and / or a more turbulent flow path than having to travel with flat guide surfaces.

    Claims (7)

    Steuerelemente für Hochdruckhydraulikanlagen, insbesondere Ventilnadeln und Ventilsteuerkolben von Injektoren für Common-Rail-Einspritzsysteme, mit einer stationären und bewegbaren, vorzugsweise kreiszylinderförmigen Führung bzw. Führungsfläche, zwischen denen ein Dichtspalt vorgesehen ist, dadurch gekennzeichnet, dass vorzugsweise die bewegbare Führungsfläche (4) eine Strukturierung (5) aufweist.Control elements for high-pressure hydraulic systems, in particular valve needles and valve control pistons of injectors for common rail injection systems, with a stationary and movable, preferably circular-cylindrical guide or guide surface, between which a sealing gap is provided, characterized in that preferably the movable guide surface (4) is structured (5). Steuerelemente nach Anspruch 1, dadurch gekennzeichnet, dass als Strukturierung parallele Umfangsnuten vorgesehen sind.Control elements according to claim 1, characterized in that parallel circumferential grooves are provided as structuring. Steuerelemente nach Anspruch 1, dadurch gekennzeichnet, dass die Strukturierung als flachgängiges Gewinde (5) ausgebildet ist.Control elements according to claim 1, characterized in that the structuring is designed as a flat thread (5). Steuerelemente nach Anspruch 3, dadurch gekennzeichnet, dass sich die Strukturierung vorzugsweise über die gesamte Länge der Führungsfläche (4) erstreckt.Control elements according to claim 3, characterized in that the structuring preferably extends over the entire length of the guide surface (4). Steuerelemente nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass zumindest die bewegte Führungsfläche (4) eine Beschichtung aufweist, wobei die Strukturierung mindestens teilweise aus der Beschichtung aufgebracht ist.Control elements according to one of claims 1 to 4, characterized in that at least the moving guide surface (4) has a coating, wherein the structuring is at least partially applied from the coating. Steuerelemente nach Anspruch 5, dadurch gekennzeichnet, dass die Beschichtung Kohlenstoff aufweist. Control elements according to claim 5, characterized in that the coating has carbon. Steuerelemente nach Anspruch 1, dadurch gekennzeichnet, dass die Strukturierung in Form von Ausnehmungen ausgebildet ist.Control elements according to claim 1, characterized in that the structuring is in the form of recesses.
    EP01111698A 2000-05-19 2001-05-14 Guiding device for high pressure hydraulic systems Withdrawn EP1156209A3 (en)

    Applications Claiming Priority (2)

    Application Number Priority Date Filing Date Title
    DE2000124854 DE10024854C2 (en) 2000-05-19 2000-05-19 Valve needle and valve control piston of injectors
    DE10024854 2000-05-19

    Publications (2)

    Publication Number Publication Date
    EP1156209A2 true EP1156209A2 (en) 2001-11-21
    EP1156209A3 EP1156209A3 (en) 2003-03-05

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    Family Applications (1)

    Application Number Title Priority Date Filing Date
    EP01111698A Withdrawn EP1156209A3 (en) 2000-05-19 2001-05-14 Guiding device for high pressure hydraulic systems

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    DE (1) DE10024854C2 (en)

    Cited By (7)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    FR2850712A1 (en) * 2003-01-23 2004-08-06 Denso Corp SLIDING STRUCTURE FOR ABRASION IMPROVED RESISTANCE ROD AND INJECTOR
    EP1498603A1 (en) * 2003-07-16 2005-01-19 Wärtsilä Schweiz AG Piston for a high pressure piston cylinder unit of an injection valve
    FR2865505A1 (en) * 2004-01-27 2005-07-29 Denso Corp Fuel injection device for e.g. Diesel engine, has injection unit including guiding part, where ratio of minimal thickness of injection unit at level of guiding part to outer diameter of sliding part of injection needle is of specific value
    WO2008026438A1 (en) * 2006-08-31 2008-03-06 Mitsubishi Heavy Industries, Ltd. Fuel injection valve
    DE102011051904A1 (en) * 2011-07-18 2012-06-21 L'orange Gmbh Device i.e. nozzle element, for use in fuel injection system, has structures formed at surfaces of guiding path and/or lifting rod and comprising and/or formed by trimming edges that traverse each other based on stroke position
    EP2487361A1 (en) * 2011-02-14 2012-08-15 Caterpillar Motoren GmbH & Co. KG Nozzle needle for a fuel injector and fuel injector
    WO2019011973A1 (en) * 2017-07-12 2019-01-17 L'orange Gmbh Fuel injection and injection system for an internal combustion engine

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    DE102005061781A1 (en) * 2005-12-23 2007-06-28 Schaeffler Kg Injector for automotive fuel injection system has laser-cut micro detents in contact zone sidewall around piston

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    Cited By (18)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    US7118046B2 (en) 2003-01-23 2006-10-10 Denso Corporation Sliding structure for shaft member with improved abrasion resistance and injector
    FR2850712A1 (en) * 2003-01-23 2004-08-06 Denso Corp SLIDING STRUCTURE FOR ABRASION IMPROVED RESISTANCE ROD AND INJECTOR
    KR101307563B1 (en) * 2003-07-16 2013-09-12 베르트질레 슈바이츠 악티엔게젤샤프트 Piston for a high pressure piston in cylinder unit
    EP1498603A1 (en) * 2003-07-16 2005-01-19 Wärtsilä Schweiz AG Piston for a high pressure piston cylinder unit of an injection valve
    CN100449140C (en) * 2003-07-16 2009-01-07 瓦特西拉瑞士股份有限公司 Piston for a high pressure piston cylinder unit of an injection valve
    FR2865505A1 (en) * 2004-01-27 2005-07-29 Denso Corp Fuel injection device for e.g. Diesel engine, has injection unit including guiding part, where ratio of minimal thickness of injection unit at level of guiding part to outer diameter of sliding part of injection needle is of specific value
    DE102005003663B4 (en) * 2004-01-27 2015-09-03 Denso Corporation Fuel injectors with reduced wear
    US7367517B2 (en) 2004-01-27 2008-05-06 Denso Corporation Fuel injection device inhibiting abrasion
    US7635098B2 (en) 2004-01-27 2009-12-22 Denso Corporation Fuel injection device inhibiting abrasion
    US7654475B2 (en) 2006-08-31 2010-02-02 Mitsubishi Heavy Industries, Inc. Fuel injection valve
    CN101365874B (en) * 2006-08-31 2011-07-06 三菱重工业株式会社 Fuel injection valve
    WO2008026438A1 (en) * 2006-08-31 2008-03-06 Mitsubishi Heavy Industries, Ltd. Fuel injection valve
    EP2487361A1 (en) * 2011-02-14 2012-08-15 Caterpillar Motoren GmbH & Co. KG Nozzle needle for a fuel injector and fuel injector
    WO2012110209A1 (en) * 2011-02-14 2012-08-23 Caterpillar Motoren Gmbh & Co. Kg Nozzle needle for a fuel injector, method to manufacture the nozzle needle and fuel injector
    CN103562540A (en) * 2011-02-14 2014-02-05 卡特彼勒发动机有限责任两合公司 Nozzle needle for a fuel injector, method to manufacture the nozzle needle and fuel injector
    CN103562540B (en) * 2011-02-14 2016-04-13 卡特彼勒发动机有限责任两合公司 For the nozzle needle of fuel injector, the method manufacturing this nozzle needle and fuel injector
    DE102011051904A1 (en) * 2011-07-18 2012-06-21 L'orange Gmbh Device i.e. nozzle element, for use in fuel injection system, has structures formed at surfaces of guiding path and/or lifting rod and comprising and/or formed by trimming edges that traverse each other based on stroke position
    WO2019011973A1 (en) * 2017-07-12 2019-01-17 L'orange Gmbh Fuel injection and injection system for an internal combustion engine

    Also Published As

    Publication number Publication date
    DE10024854C2 (en) 2002-11-28
    DE10024854A1 (en) 2001-11-22
    EP1156209A3 (en) 2003-03-05

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