EP1287255A1 - Injection valve for injecting fuel into the combustion chamber of an internal combustion engine - Google Patents

Injection valve for injecting fuel into the combustion chamber of an internal combustion engine

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Publication number
EP1287255A1
EP1287255A1 EP01953161A EP01953161A EP1287255A1 EP 1287255 A1 EP1287255 A1 EP 1287255A1 EP 01953161 A EP01953161 A EP 01953161A EP 01953161 A EP01953161 A EP 01953161A EP 1287255 A1 EP1287255 A1 EP 1287255A1
Authority
EP
European Patent Office
Prior art keywords
nozzle needle
injection valve
nozzle
housing
valve 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.)
Granted
Application number
EP01953161A
Other languages
German (de)
French (fr)
Other versions
EP1287255B1 (en
Inventor
Wolfgang Scheibe
Horst Ressel
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.)
LOrange GmbH
Original Assignee
LOrange 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 LOrange GmbH filed Critical LOrange GmbH
Publication of EP1287255A1 publication Critical patent/EP1287255A1/en
Application granted granted Critical
Publication of EP1287255B1 publication Critical patent/EP1287255B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • 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
    • 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
    • F02M61/20—Closing valves mechanically, e.g. arrangements of springs or weights or permanent magnets; Damping of valve lift
    • 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

Definitions

  • Injection valve for injecting fuel into the combustion chamber of an internal combustion engine
  • the invention relates to an injection valve for injecting fuel into the combustion chamber of an internal combustion engine, as is required in the preamble of claim 1.
  • Such an injection valve is known, for example, from US 5,832,899.
  • the housing of the injection valve consists of a nozzle part with the injection openings and a nozzle holder, to which the nozzle part is attached with a screw sleeve.
  • a longitudinally displaceably guided nozzle needle is accommodated in a bore in the nozzle part. Clamped between the nozzle holder and the nozzle part there is an insert which delimits a control space on one side in which the nozzle needle lies with its rear end facing away from the injection holes.
  • the insert On the opposite side, the insert has a drain opening, which is connected to the control chamber via a central hole and a drain throttle.
  • control chamber Via an inlet throttle, the control chamber is connected to a fuel channel, which supplies fuel under pressure to a nozzle antechamber located in front of the injection holes.
  • fuel pressure that acts on the back of the nozzle needle when the drain opening is closed holds in association with one
  • Valve closing spring the nozzle needle in contact with the valve seat in the nozzle part so that no injection takes place. If the discharge opening controlled by a control valve is released, the fuel pressure in the control chamber drops and the nozzle needle lifts off its valve seat due to the fuel acting on the front of the nozzle needle and under the injection pressure.
  • a disadvantage of the illustrated injection valve is that a large dead volume is formed by the closing spring located in the control chamber and acting on the back of the nozzle needle.
  • the reaction of the injector to switching commands depends on the size of the dead volume of the control room. If, for example, an injection is to be initiated, the dead volume must first be relaxed, for which purpose a time period is required which increases the reaction time of the start of injection to the control command. Conversely, the dead volume also causes the reaction time to be extended when the injection valve is closed to end the injection. Long Response times affect the accuracy of the injection and impair the suitability of the injector for pre-injection.
  • the invention is based on the problem of specifying a closing spring arrangement with a simple construction, which on the one hand has a compact construction of the
  • the object is achieved in that the closing spring is provided on the circumference of the nozzle needle below the nozzle needle guide outside the control chamber.
  • the closing spring allows a compact design of the injection valve without having to accept a complex construction.
  • the end face of a guide sleeve serves as an abutment for the closing spring on the housing side.
  • the nozzle needle is advantageously designed with a circumferential groove in which an inwardly spring-loaded ring engages, on which the spring plate of the closing spring can be supported.
  • Figure 1 a longitudinal section through the injection valve according to the invention in the region of the nozzle part
  • Figure 2 a nozzle needle with an integrally formed edge as an abutment.
  • FIG. 1 shows a longitudinal section of an injection valve 1 in the area of the nozzle part 2.
  • the nozzle part 2, which contains the injection holes 3, is fastened to the nozzle holder 4, which is not fully illustrated, by means of a screw sleeve 5.
  • a nozzle needle 17 is axially movable.
  • the nozzle needle 17 lies with a nozzle needle shaft 19 in a guide sleeve 20 forming a guide 26, which in turn is arranged in a housing bore 21 of the nozzle part 2.
  • the nozzle holder 4 contains an electromagnetic control valve (not shown), the armature of which is connected to an actuator 6.
  • the Actuator 6, which is also only partially shown, can be designed in the form of a rod, the end face of which, as shown, cooperates with a drain opening 7.
  • the discharge opening 7 is connected to a control chamber 11 via a discharge throttle 8 and a bore 9 in an insert part 10 between the nozzle holder 4 and the nozzle part 2.
  • the control chamber 11 is connected via a further bore 12 and an inlet throttle 13 to a fuel inlet channel 14, via which fuel under the injection pressure is fed to a nozzle antechamber 15, which is located upstream of the injection holes 3.
  • the nozzle needle 17 Due to the fuel pressure acting on the outlet opening 7 in the control chamber 11 and thus also on the rear of the nozzle needle and the prestressed closing spring 16 also acting in the closing direction, the nozzle needle 17 is held pressed against the valve seat 18 in the nozzle part 2 so that no injection takes place. If the actuator 6 is withdrawn and the discharge opening 7 is thus released, the pressure in the control chamber 11 drops. The fuel flowing out via the discharge opening 7 reaches a return channel 25 shown in broken lines. The speed at which the pressure drop opens and the pressure increase closes the Injection valve takes place in the control room 11 should be as high as possible in order to allow a quick reaction of the injection valve 1 to the switching commands.
  • control chamber 11 remains free of internals and thus has a small dead volume, which is made possible by the arrangement of the closing spring 16 on the circumference of the nozzle needle.
  • the arrangement of the closing spring 16 on the circumference of the nozzle needle 17 allows a simple construction of the injection valve 1, in particular a compact design being possible.
  • the abutments required to support the closing spring 16 are formed on the house side according to FIG. 1 by the guide sleeve 20 of the nozzle needle shaft 19.
  • the closing spring 16 is supported on an end face of the guide sleeve 20.
  • the abutment can be formed, for example, by a circumferential groove 22 and a ring 23 which is locked therein and resiliently radially inward.
  • FIG. 2 there is also the possibility of representing the abutment on the nozzle needle 17 by means of an edge 24 formed integrally with the nozzle needle 17.

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)
  • Fuel-Injection Apparatus (AREA)

Abstract

An injection valve for injecting fuel into the combustion chamber of an internal combustion engine has an injector needle guided inside the housing in such a way that it can be displaced longitudinally with a shaft in order to open and close the injection cross-sections. The injector needle is actuated by the fuel pressure which act upon the injector needle and by a closing spring acting in the closing direction of the injection needle. The closing spring is pre-compressed between abutments on the injector needle and the housing and is situated on the perimeter of the injector needle in the area between the injector needle guide and the valve seat. One advantage of the arrangement is the compact construction of the injection valve and the low dead volume of the control chamber on the reverse side of the injector needle.

Description

B E S C H R E I B U N G DESCRIPTION
Einspritzventil zum Einspritzen von Kraftstoff in den Brennraum einer BrennkraftmaschineInjection valve for injecting fuel into the combustion chamber of an internal combustion engine
Die Erfindung betrifft ein Einspritzventil zum Einspritzen von Kraftstoff in den Brennraum einer Brennkraftmaschine, wie es im Oberbegriff des Anspruchs 1 vorausgesetzt ist.The invention relates to an injection valve for injecting fuel into the combustion chamber of an internal combustion engine, as is required in the preamble of claim 1.
Ein solches Einspritzventil geht beispielsweise aus der US 5,832,899 als bekannt hervor. Das Gehäuse des Einspritzventils besteht aus einem Düsenteil mit den Einspritzöffnungen und einem Düsenhalter, an dem das Düsenteil mit einer Schraubhülse befestigt ist. In einer Bohrung des Düsenteils ist eine längsverschieblich geführte Düsennadel aufgenommen. Zwischen Düsenhalter und Düsenteil eingespannt befindet sich ein Einlegteil, das auf einer Seite einen Steuerraum begrenzt, in dem die Düsennadel mit ihrem rückwärtigen, den Einspritzlöchern abgewandten Ende liegt. Auf der gegenüberliegenden Seite besitzt das Einlegteil eine Abflussöffnung, die über eine zentrale Bohrung und eine Abflussdrossel mit dem Steuerraum verbunden ist. Über eine Zulaufdrossel ist der Steuerraum mit einem Kraftstoffkanal verbunden, der einem vor den Einspritzlöchern liegenden Düsenvorraum unter Druck stehenden Kraftstoff zuführt. Der bei verschlossener Abflussöffnung auf der Düsennadelrückseite wirkende Kraftstoffdruck hält im Verband mit einerSuch an injection valve is known, for example, from US 5,832,899. The housing of the injection valve consists of a nozzle part with the injection openings and a nozzle holder, to which the nozzle part is attached with a screw sleeve. A longitudinally displaceably guided nozzle needle is accommodated in a bore in the nozzle part. Clamped between the nozzle holder and the nozzle part there is an insert which delimits a control space on one side in which the nozzle needle lies with its rear end facing away from the injection holes. On the opposite side, the insert has a drain opening, which is connected to the control chamber via a central hole and a drain throttle. Via an inlet throttle, the control chamber is connected to a fuel channel, which supplies fuel under pressure to a nozzle antechamber located in front of the injection holes. The fuel pressure that acts on the back of the nozzle needle when the drain opening is closed holds in association with one
Ventilschließfeder die Düsennadel in Anlage am Ventilsitz im Düsenteil, so dass keine Einspritzung erfolgt. Wird die von einem Steuerventil gesteuerte Abflussöffnung freigegeben, sinkt der Kraftstoff druck im Steuerraum und die Düsennadel hebt aufgrund des auf der Düsennadelvorderseite wirkenden, unter dem Einspritzdruck stehenden Kraftstoffs von ihrem Ventilsitz ab. Nachteilig an dem dargestellten Einspritzventil ist, dass durch die im Steuerraum liegende, auf die Düsennadelrückseite wirkende Schließfeder ein großes Totvolumen gebildet wird. Die Reaktion des Injektors auf Schaltbefehle ist jedoch von der Größe des Totvolumens des Steuerraums abhängig. Soll beispielsweise eine Einspritzung eingeleitet werden, so muss das Totvolumen zunächst entspannt werden, wozu eine Zeitspanne benötigt wird, welche die Reaktionszeit des Einspritzbeginns auf den Steuerbefehl vergrößert. Umgekehrt verursacht das Totvolumen auch beim Schließen des Einspritzventils zum Beenden der Einspritzung eine Verlängerung der Reaktionszeit. Lange Reaktionszeiten beeinträchtigen die Genauigkeit der Einspritzung und verschlechtern die Eignung des Injektors für Voreinspritzung.Valve closing spring the nozzle needle in contact with the valve seat in the nozzle part so that no injection takes place. If the discharge opening controlled by a control valve is released, the fuel pressure in the control chamber drops and the nozzle needle lifts off its valve seat due to the fuel acting on the front of the nozzle needle and under the injection pressure. A disadvantage of the illustrated injection valve is that a large dead volume is formed by the closing spring located in the control chamber and acting on the back of the nozzle needle. The reaction of the injector to switching commands depends on the size of the dead volume of the control room. If, for example, an injection is to be initiated, the dead volume must first be relaxed, for which purpose a time period is required which increases the reaction time of the start of injection to the control command. Conversely, the dead volume also causes the reaction time to be extended when the injection valve is closed to end the injection. Long Response times affect the accuracy of the injection and impair the suitability of the injector for pre-injection.
Der Erfindung liegt die Problemstellung zugrunde, bei einfacher Konstruktion eine Schließfederanordnung anzugeben, die einerseits eine kompakte Bauweise desThe invention is based on the problem of specifying a closing spring arrangement with a simple construction, which on the one hand has a compact construction of the
Einspritzventils zulässt und andrerseits auch kurze Reaktionszeiten auf Schaltbefehle ermöglicht.Allows injection valve and on the other hand also enables short reaction times to switching commands.
Erfindungsgemäß wird die gestellte Aufgabe dadurch gelöst, dass die Schließfeder auf dem Umfang der Düsennadel unterhalb der Düsennadelführung außerhalb des Steuerraums vorgesehen ist.According to the invention, the object is achieved in that the closing spring is provided on the circumference of the nozzle needle below the nozzle needle guide outside the control chamber.
Diese Anordnung der Schließfeder erlaubt eine kompakte Ausführung des Einspritzventils, ohne dafür eine aufwendige Konstruktion in Kauf zu nehmen. Bei einer bevorzugten Ausführungsform dient die Stirnseite einer Führungshülse als gehäuseseitiges Widerlager für die Schließfeder. Die Düsennadel ist vorteilhafterweise mit einer umlaufenden Nut ausgeführt, in der ein nach innen federnd vorgespannter Ring einrastet, auf dem der Federteller der Schließfeder abgestützt werden kann.This arrangement of the closing spring allows a compact design of the injection valve without having to accept a complex construction. In a preferred embodiment, the end face of a guide sleeve serves as an abutment for the closing spring on the housing side. The nozzle needle is advantageously designed with a circumferential groove in which an inwardly spring-loaded ring engages, on which the spring plate of the closing spring can be supported.
Ein Ausführungsbeispiel der Erfindung wird anhand der beigefügten Zeichnungen erläutert. Es zeigen:An embodiment of the invention is explained with reference to the accompanying drawings. Show it:
Figur 1: einen Längsschnitt durch das erfindungsgemäße Einspritzventil im Bereich des Düsenteils, und Figur 2: eine Düsennadel mit angeformtem Rand als Widerlager.Figure 1: a longitudinal section through the injection valve according to the invention in the region of the nozzle part, and Figure 2: a nozzle needle with an integrally formed edge as an abutment.
Figur 1 zeigt einen Längsschnitt eines Einspritzventils 1 im Bereich des Düsenteils 2. Das Düsenteil 2, das die Einspritzlöcher 3 enthält, ist mittels einer Schraubhülse 5 am unvollständig dargestellten Düsenhalter 4 befestigt. Im Düsenteil 2 ist eine Düsennadel 17 axialbeweglich geführt. Die Düsennadel 17 liegt mit einem Düsennadelschaft 19 in einer eine Führung 26 bildenden Führungshülse 20, die ihrerseits in einer Gehäusebohrung 21 des Düsenteils 2 angeordnet ist. Der Düsenhalter 4 beinhaltet ein nicht dargestelltes elektromagnetisches Steuerventil, dessen Anker mit einem Stellglied 6 verbunden ist. Das Stellglied 6, das ebenfalls nur teilweise dargestellt ist, kann in Form einer Stange ausgeführt sein, deren Stirnseite, wie dargestellt, mit einer Abflussöffnung 7 zusammenwirkt. Die Abflussöffnung 7 steht über eine Abflussdrossel 8 und eine Bohrung 9 in einem Einlegeteil 10 zwischen Düsenhalter 4 und Düsenteil 2 mit einem Steuerraum 11 in Verbindung. Über eine weitere Bohrung 12 und eine Zulaufdrossel 13 steht der Steuerraum 1 1 mit einem Kraftstoffzulaufkanal 14 in Verbindung, über den unter dem Einspritzdruck stehender Kraftstoff einem Düsenvorraum 15 zugeführt wird, der den Einspritzlöchem 3 vorgelagert ist. Aufgrund des bei verschlossener Abflussöffnung 7 im Steuerraum 1 1 und damit auch auf der Düsennadelrückseite wirkenden Kraftstoffdrucks und der ebenfalls in Schließrichtung wirkenden vorgespannten Schließfeder 16 wird die Düsennadel 17 in Anlage am Ventilsitz 18 im Düsenteil 2 angedrückt gehalten, so dass keine Einspritzung erfolgt. Wird das Stellglied 6 zurückgezogen und die Abflussöffnung 7 damit frei gegeben, sinkt der Druck im Steuerraum 11. Der über die Abflussöffnung 7 abströmende Kraftstoff gelangt in einen gestrichelt dargestellten Rücklaufkanal 25. Die Geschwindigkeit, mit der der Druckabfall zum Öffnen und der Druckanstieg zum Schließen des Einspritzventils im Steuerraum 11 stattfindet, soll so hoch wie möglich sein, um eine schnelle Reaktion des Einspritzventils 1 auf die Schaltbefehle zu ermöglichen. Diese Voraussetzung ist dadurch gegeben, dass der Steuerraum 11 frei von Einbauten bleibt und damit ein kleines Totvolumen aufweist, was durch die Anordnung der Schließfeder 16 auf dem Düsennadelumfang ermöglicht wird. Zugleich erlaubt die Anordnung der Schließfeder 16 auf dem Umfang der Düsennadel 17 eine einfache Konstruktion des Einspritzventils 1, wobei insbesondere eine kompakte Ausführung möglich ist.FIG. 1 shows a longitudinal section of an injection valve 1 in the area of the nozzle part 2. The nozzle part 2, which contains the injection holes 3, is fastened to the nozzle holder 4, which is not fully illustrated, by means of a screw sleeve 5. In the nozzle part 2, a nozzle needle 17 is axially movable. The nozzle needle 17 lies with a nozzle needle shaft 19 in a guide sleeve 20 forming a guide 26, which in turn is arranged in a housing bore 21 of the nozzle part 2. The nozzle holder 4 contains an electromagnetic control valve (not shown), the armature of which is connected to an actuator 6. The Actuator 6, which is also only partially shown, can be designed in the form of a rod, the end face of which, as shown, cooperates with a drain opening 7. The discharge opening 7 is connected to a control chamber 11 via a discharge throttle 8 and a bore 9 in an insert part 10 between the nozzle holder 4 and the nozzle part 2. The control chamber 11 is connected via a further bore 12 and an inlet throttle 13 to a fuel inlet channel 14, via which fuel under the injection pressure is fed to a nozzle antechamber 15, which is located upstream of the injection holes 3. Due to the fuel pressure acting on the outlet opening 7 in the control chamber 11 and thus also on the rear of the nozzle needle and the prestressed closing spring 16 also acting in the closing direction, the nozzle needle 17 is held pressed against the valve seat 18 in the nozzle part 2 so that no injection takes place. If the actuator 6 is withdrawn and the discharge opening 7 is thus released, the pressure in the control chamber 11 drops. The fuel flowing out via the discharge opening 7 reaches a return channel 25 shown in broken lines. The speed at which the pressure drop opens and the pressure increase closes the Injection valve takes place in the control room 11 should be as high as possible in order to allow a quick reaction of the injection valve 1 to the switching commands. This requirement is met by the fact that the control chamber 11 remains free of internals and thus has a small dead volume, which is made possible by the arrangement of the closing spring 16 on the circumference of the nozzle needle. At the same time, the arrangement of the closing spring 16 on the circumference of the nozzle needle 17 allows a simple construction of the injection valve 1, in particular a compact design being possible.
Die zur Abstützung der Schließfeder 16 erforderlichen Widerlager werden entsprechend Figur 1 gehauseseitig von der Führungshülse 20 des Düsennadelschafts 19 gebildet. Dabei stützt sich die Schließfeder 16 auf einer Stirnseite der Führungshülse 20 ab. Düsennadelseitig kann das Widerlager zum Beispiel durch eine umlaufende Nut 22 und darin eingerastetem, radial nach innen federndem Ring 23 gebildet werden. Wie in Figur 2 dargestellt, besteht auch die Möglichkeit, das Widerlager an der Düsennadel 17 durch einen mit der Düsennadel 17 einstückig ausgeformten Rand 24 darzustellen. The abutments required to support the closing spring 16 are formed on the house side according to FIG. 1 by the guide sleeve 20 of the nozzle needle shaft 19. The closing spring 16 is supported on an end face of the guide sleeve 20. On the nozzle needle side, the abutment can be formed, for example, by a circumferential groove 22 and a ring 23 which is locked therein and resiliently radially inward. As shown in FIG. 2, there is also the possibility of representing the abutment on the nozzle needle 17 by means of an edge 24 formed integrally with the nozzle needle 17.

Claims

P A T E N TA N S P R Ü C H E PATEN TA NSPRÜ CHE
1. Einspritzventil (1) zum Einspritzen von Kraftstoff in den Brennraum einer Brennkraftmaschine, mit einem Gehäuse, einer Düsennadel (17), die mit einem Düsennadelschaft (19) in einer Führung (26) im Gehäuse längsverschieblich gelagert ist und an einem Ende mit einem Ventilsitz (18) im Sinne eines Öffnens und Schließens eines Einspritzquerschnitts des Gehäuses zusammenwirkt, einem dem Düsennadelschaft (19) ventilsitzseitig vorgelagerten Düsenvorraum (15), der mit einem Kraftstoffzuführungskanal (14) zur Zufuhr von einzuspritzendem, unter Druck stehendem Kraftstoff in Verbindung steht, einem mit der Düsennadel (17) gekoppelten1. Injection valve (1) for injecting fuel into the combustion chamber of an internal combustion engine, with a housing, a nozzle needle (17) which is mounted with a nozzle needle shaft (19) in a guide (26) in the housing and is displaceable at one end with one Valve seat (18) cooperates in the sense of opening and closing an injection cross section of the housing, a nozzle antechamber (15) in front of the nozzle needle shaft (19) on the valve seat side, which is connected to a fuel supply channel (14) for supplying fuel to be injected and under pressure coupled with the nozzle needle (17)
Steuerraum (1 1), der mit unter Druck stehendem Kraftstoff beaufschlagbar ist, und der mittels eines mit einem Steuerventil gekoppelten Stellglieds (6) im Sinne eines Öffnens der Düsennadel (17) druckentlastbar ist, und mit einer die Düsennadel (17) in Schließrichtung beaufschlagenden Schließfeder (16), welche mit Widerlagern an Düsennadel (17) und Gehäuse zusammenwirkt, dadurch gekennzeichnet, dass dieControl chamber (1 1) which can be pressurized with fuel under pressure and which can be relieved of pressure by means of an actuator (6) coupled to a control valve in the sense of opening the nozzle needle (17), and with one which acts on the nozzle needle (17) in the closing direction Closing spring (16) which cooperates with abutments on the nozzle needle (17) and housing, characterized in that the
Schließfeder (16) in dem Bereich zwischen dem Düsennadelschaft (19) und dem Ventilsitz (18) auf dem Umfang der Düsennadel (17) angeordnet ist.Closing spring (16) is arranged in the area between the nozzle needle shaft (19) and the valve seat (18) on the circumference of the nozzle needle (17).
2. Einspritzventil nach Anspruch 1, dadurch gekennzeichnet, dass das Gehäuse des Einspritzventils (1) mit einem separaten, an einem Düsenhalter (4) befestigten2. Injection valve according to claim 1, characterized in that the housing of the injection valve (1) with a separate, on a nozzle holder (4) attached
Düsenteil (2) ausgebildet ist, und dass das Düsenteil (2) die Führung (26) für den Düsennadelschaft (19) beinhaltet.Nozzle part (2) is formed, and that the nozzle part (2) includes the guide (26) for the nozzle needle shaft (19).
3. Einspritzventil nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die Düsennadel (17) mit ihrem rückwärtigen, dem Ventilsitz (18) abgewandten Ende im Steuerraum3. Injection valve according to claim 1 or 2, characterized in that the nozzle needle (17) with its rear end facing away from the valve seat (18) in the control chamber
(11) liegt.(11) lies.
4. • Einspritzventil nach Anspruch 1, 2 oder 3, dadurch gekennzeichnet, dass das Steuerventil im Düsenhalter (4) oberhalb des Steuerraums (1 1) angeordnet ist und mit dem Stellglied (6) eine mit dem Steuerraum (1 1) in Verbindung stehende4. • Injection valve according to claim 1, 2 or 3, characterized in that the control valve in the nozzle holder (4) above the control chamber (1 1) is arranged and with the actuator (6) with the control chamber (1 1) in connection
Abflussöffnung (7) steuert. Drain opening (7) controls.
5. Einspritzventil nach Anspruch 4, dadurch gekennzeichnet, dass zwischen Düsenteil (2) und Düsenhalter (4) ein scheibenförmiges Einlegteil (10) vorgesehen ist, das einerseits die Abflussöffnung (7) enthält und andrerseits als Anschlag für die Düsennadel (17) dient.5. Injection valve according to claim 4, characterized in that between the nozzle part (2) and nozzle holder (4) a disc-shaped insert part (10) is provided, which on the one hand contains the drain opening (7) and on the other hand serves as a stop for the nozzle needle (17).
6. Einspritzventil nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass der Düsennadelschaft (19) in einer Führungshülse (20) geführt ist, die in einer Gehäusebohrung (21) liegt, und dass ein dem Steuerraum (1 1) abgewandter stirnseitiger Rand der Führungshülse (20) als gehäuseseitiges Widerlager für die Schließfeder (16) dient.6. Injection valve according to one of claims 1 to 5, characterized in that the nozzle needle shaft (19) is guided in a guide sleeve (20) which lies in a housing bore (21), and in that a front edge facing away from the control chamber (1 1) the guide sleeve (20) serves as a housing-side abutment for the closing spring (16).
7. Einspritzventil nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass als düsennadelseitiges Widerlager ein mit der Düsennadel (17) verbundener umlaufender Rand (24) dient.7. Injection valve according to one of claims 1 to 6, characterized in that a peripheral edge (24) connected to the nozzle needle (17) serves as the nozzle needle-side abutment.
8. Einspritzventil nach Anspruch 7, dadurch gekennzeichnet, dass der Rand (24) einstückig mit der Düsennadel (17) ist.8. Injection valve according to claim 7, characterized in that the edge (24) is in one piece with the nozzle needle (17).
9. Einspritzventil nach Anspruch 7, dadurch gekennzeichnet, dass der Rand (24) von einem auf der Düsennadel (17) befestigten Ring (23) gebildet ist.9. Injection valve according to claim 7, characterized in that the edge (24) is formed by a ring (23) fastened on the nozzle needle (17).
10. Einspritzventil nach Anspruch 9, dadurch gekennzeichnet, dass der Ring (23) unter radialer Vorspannung in einer Nut (22) der Düsennadel (17) liegt. 10. Injection valve according to claim 9, characterized in that the ring (23) is under radial prestress in a groove (22) of the nozzle needle (17).
EP01953161A 2000-05-26 2001-05-25 Injection valve for injecting fuel into the combustion chamber of an internal combustion engine Expired - Lifetime EP1287255B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10026286A DE10026286A1 (en) 2000-05-26 2000-05-26 Injection valve for injecting fuel into the combustion chamber of an internal combustion engine
DE10026286 2000-05-26
PCT/EP2001/005973 WO2001090566A1 (en) 2000-05-26 2001-05-25 Injection valve for injecting fuel into the combustion chamber of an internal combustion engine

Publications (2)

Publication Number Publication Date
EP1287255A1 true EP1287255A1 (en) 2003-03-05
EP1287255B1 EP1287255B1 (en) 2006-02-22

Family

ID=7643763

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01953161A Expired - Lifetime EP1287255B1 (en) 2000-05-26 2001-05-25 Injection valve for injecting fuel into the combustion chamber of an internal combustion engine

Country Status (7)

Country Link
US (1) US6808132B2 (en)
EP (1) EP1287255B1 (en)
JP (1) JP2003534493A (en)
KR (1) KR100713273B1 (en)
AT (1) ATE318372T1 (en)
DE (2) DE10026286A1 (en)
WO (1) WO2001090566A1 (en)

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AT501668B1 (en) * 2004-08-24 2007-03-15 Bosch Gmbh Robert CONTROL VALVE FOR AN INJECTION NOZZLE
US10116750B2 (en) * 2016-04-01 2018-10-30 Intel Corporation Mechanism for highly available rack management in rack scale environment

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Also Published As

Publication number Publication date
DE50109004D1 (en) 2006-04-27
JP2003534493A (en) 2003-11-18
KR100713273B1 (en) 2007-05-04
EP1287255B1 (en) 2006-02-22
US20040074983A1 (en) 2004-04-22
DE10026286A1 (en) 2001-12-13
ATE318372T1 (en) 2006-03-15
WO2001090566A1 (en) 2001-11-29
US6808132B2 (en) 2004-10-26
KR20030007696A (en) 2003-01-23

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