EP1576281B1 - Sliding valve - Google Patents

Sliding valve Download PDF

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Publication number
EP1576281B1
EP1576281B1 EP03776910A EP03776910A EP1576281B1 EP 1576281 B1 EP1576281 B1 EP 1576281B1 EP 03776910 A EP03776910 A EP 03776910A EP 03776910 A EP03776910 A EP 03776910A EP 1576281 B1 EP1576281 B1 EP 1576281B1
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EP
European Patent Office
Prior art keywords
control
valve according
sliding valve
sliding sleeve
control cylinder
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.)
Expired - Fee Related
Application number
EP03776910A
Other languages
German (de)
French (fr)
Other versions
EP1576281A1 (en
Inventor
Gernot Hertweck
Holger KÖGL
Katsuyoshi Koyanagi
Heinrich Müller
Heinz Öing
Gregor Renner
Marco Stotz
Jens-Peter Wobbe
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Mercedes Benz Group AG
Original Assignee
DaimlerChrysler AG
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Publication date
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Publication of EP1576281A1 publication Critical patent/EP1576281A1/en
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Publication of EP1576281B1 publication Critical patent/EP1576281B1/en
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • F02M61/16—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
    • F02M61/04—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
    • F02M61/042—The valves being provided with fuel passages
    • 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
    • F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
    • F02M63/0012—Valves
    • F02M63/007—Details not provided for in, or of interest apart from, the apparatus of the groups F02M63/0014 - F02M63/0059
    • F02M63/0078—Valve member details, e.g. special shape, hollow or fuel passages in the valve member
    • F02M63/008—Hollow valve members, e.g. members internally guided
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M51/00—Fuel-injection apparatus characterised by being operated electrically
    • F02M51/06—Injectors peculiar thereto with means directly operating the valve needle
    • F02M51/061—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M51/00—Fuel-injection apparatus characterised by being operated electrically
    • F02M51/06—Injectors peculiar thereto with means directly operating the valve needle
    • F02M51/061—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means
    • F02M51/0625—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures
    • F02M51/0635—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a plate-shaped or undulated armature not entering the winding
    • F02M51/066—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a plate-shaped or undulated armature not entering the winding the armature and the valve being allowed to move relatively to each other or not being attached to each other
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M51/00—Fuel-injection apparatus characterised by being operated electrically
    • F02M51/06—Injectors peculiar thereto with means directly operating the valve needle
    • F02M51/061—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means
    • F02M51/0625—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures
    • F02M51/0664—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a cylindrically or partly cylindrically shaped armature, e.g. entering the winding; having a plate-shaped or undulated armature entering the winding
    • F02M51/0685—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a cylindrically or partly cylindrically shaped armature, e.g. entering the winding; having a plate-shaped or undulated armature entering the winding the armature and the valve being allowed to move relatively to each other or not being attached to each other
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
    • F02M61/18—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for
    • F02M61/1806—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for characterised by the arrangement of discharge orifices, e.g. orientation or size

Definitions

  • the invention relates to a slide valve according to the preamble of claim 1.
  • a reciprocating internal combustion engine with a fuel injector is known.
  • This has a hollow valve needle with a pointing to a combustion chamber of the internal combustion engine valve needle head.
  • the injection valve opens by the valve needle is moved outwardly toward the combustion chamber, wherein a valve seat surface on the needle head lifts from a valve seat on a nozzle body.
  • the instantaneous opening cross section of the nozzle holes is determined as a function of the needle stroke by a control edge on the inner edge of the valve seat of the nozzle body.
  • the injection valve has two rows of controllable nozzle holes, which are arranged offset to one another in the direction of movement of the valve needle.
  • the nozzle holes of one row differ from the nozzle holes of the other row in their inclination to the nozzle axis and in their cross-sectional shape, so that the mixture formation in the combustion chamber can be adapted to the operating parameters in a wide range.
  • the fuel injector is a combination of a poppet valve which, when closed, prevents dripping of the injector and a spool valve, thereby varying the amount of fuel injected and fuel conditioning can. Because of the nozzle bores in the valve needle, the walls of the valve needles must have sufficient strength.
  • valve needle head increases the mass of the valve, so that in addition to the complexity of the injection nozzle by the combination of two control mechanisms, the needle drive and actuator because of the mass of the nozzle needle is very complex and can lead to switching noise. In addition, such a system is not possible for injectors with inwardly opening nozzle needles.
  • an inwardly opening injection nozzle is known with also two rows of nozzle bores which are introduced into the nozzle body and can be connected by a coaxially arranged sliding sleeve via a corresponding end blind hole and radially extending fuel channels with the fuel pressure system.
  • the sliding sleeve is a thick-walled, cylindrical component, which is axially displaceable, precisely fitted into the nozzle body.
  • a slide valve in which a sliding sleeve is arranged axially displaceable in a control cylinder.
  • the sliding sleeve has in the end face, which faces a pressure medium input of the control cylinder, a blind hole, emanating from the radially extending pressure medium channels.
  • control surfaces can tightly close the control openings in the closed state without high production costs for close fits.
  • the invention has for its object to simplify a tight-fitting slide valve and to reduce the mass of the moving parts. It is achieved according to the invention by the features of claim 1. Further advantageous embodiments will be apparent from the dependent claims.
  • the sliding sleeve in the region of the control surface on at least one longitudinal slot, so that the control surface can yield radially. If a plurality of control surfaces distributed over the circumference assigned to a plurality of control openings, a corresponding number of longitudinal slots are provided which form between them spring tongues on which the control surfaces are arranged. If the longitudinal slots are carried out to the front side of the sliding sleeve, it is advantageous to arrange the control surfaces at the end of the spring tongues thus formed. Due to the geometric design of the spring tongues whose spring characteristics can be influenced and tailored to the application.
  • the medium namely the fuel is supplied under high pressure through the cavity of the valve needle or the sliding sleeve
  • a slide valve is particularly suitable as a fuel injection valve; however, it is equally suitable for other applications and for controlling gaseous media.
  • the slide valve according to the invention is characterized mainly by a simple design, freedom from leaks and a low mass of the moving parts, which reduces the cost of the control and Aktuatorik with short response times. Furthermore, switching noises are avoided.
  • the spring tongues are reinforced in the area of the control surfaces. This gives the control surfaces a sufficient dimensional stability, so that they can invest close to the control openings.
  • the sliding sleeve can be made of magnetically conductive material and serve its upper part at the same time as an armature of a magnetic circuit. This achieves a simplified, compact design actuators.
  • control surfaces of the sliding sleeve are assigned to the control openings clearly, it is expedient to secure the sliding sleeve during its axial movement against rotation or forcibly guide in the rotational movement.
  • This can e.g. be done by the sliding sleeve or a part connected to it has a deviating from the circular cross-sectional profile, which is guided in a matching guide of the valve body.
  • a profile could e.g. be a polygonal profile.
  • the sliding sleeve could be guided in a coarse thread.
  • a slide valve 10 in the form of a fuel injection valve for an internal combustion engine has a valve housing 11, in which a sliding sleeve 12 in a control cylinder 13 is axially displaceable in the direction of movement 29.
  • the sliding sleeve 12 is connected by a transverse pin 15 which is inserted in a transverse bore 16 of the sliding sleeve 12, with a valve rod 14.
  • This is actuated by an actuator, not shown, for example, by an electromagnet.
  • the sliding sleeve 12 and its upper part 27 can be made of magnetic material and be designed as a magnetic armature.
  • the sliding sleeve 12 has, starting from its free end, longitudinal slots 24 which are distributed over the circumference and form between them spring tongues 25, at whose ends on the outer circumference control surfaces 23 are arranged, which cooperate with control openings 17, 18 in the control cylinder 13.
  • the control openings 17, 18 are followed by outwardly directed nozzle bores 19, 20. These are offset in the direction of movement 29 of the sliding sleeve 12 to each other.
  • the control surfaces 23 cover the control openings 17, 18. In this case, a control surface 23 with one or more control openings 17, 18 cooperate.
  • the spring tongues 25 are reinforced, so that the control surfaces 23 abut tightly against the control openings 17, 18 due to the increased stiffness of form and close them without leakage.
  • the pressure with which the control surfaces 23 abut the control openings 17, 18 can be achieved by a specific bias of the spring tongues 25 or by the pressure of the medium to be controlled. This is supplied centrally through a cavity 22 of the sliding sleeve 12 and conveyed through the nozzle bores 19, 20.
  • the control cylinder 13 closes the front side with the blind hole 21.
  • the spring tongues 25 are pre-bent by a predetermined amount to the outside.
  • the spring characteristic can be determined by the material selection and the geometric design.
  • Fig. 2 which is a section of FIG. 1 in an enlarged scale substantially shows two rows of nozzle bores 19, 20 which are arranged offset in the direction of movement 29 and / or in the circumferential direction to each other.
  • the nozzle bores 19, 20 may have a different inclination to the direction of movement 29 and also have different cross-sectional profiles, as is known per se in fuel injection valves of the type mentioned.

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  • 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 invention relates to a sliding valve (10) comprising a sliding sleeve (12) that can be axially slid in a control cylinder (13). With at least one control surface (23) on its outer circumference, the sliding sleeve controls at least one control opening (17, 18) in the control cylinder (13). The inventive sliding valve is characterized in that the control surface (23) is radially elastic towards the control cylinder (13).

Description

Die Erfindung betrifft ein Schieberventil nach dem Oberbegriff des Anspruchs 1.The invention relates to a slide valve according to the preamble of claim 1.

Aus der DE 199 16 485 C2 ist eine Hubkolbenbrennkraftmaschine mit einer Kraftstoffeinspritzdüse bekannt. Diese besitzt eine hohle Ventilnadel mit einem zu einem Brennraum der Brennkraftmaschine hin weisenden Ventilnadelkopf. Zwischen dem Hohlraum der Ventilnadel und ihrem äußeren Umfang sind Düsenbohrungen vorgesehen, durch die der Kraftstoff im geöffneten Zustand des Einspritzventils in den Brennraum gespritzt wird. Das Einspritzventil öffnet, indem die Ventilnadel nach außen zum Brennraum hin verschoben wird, wobei eine Ventilsitzfläche am Nadelkopf von einem Ventilsitz an einem Düsenkörper abhebt. Der momentane Öffnungsquerschnitt der Düsenlöcher wird in Abhängigkeit vom Nadelhub von einer Steuerkante am inneren Rand des Ventilsitzes des Düsenkörpers bestimmt.From DE 199 16 485 C2 a reciprocating internal combustion engine with a fuel injector is known. This has a hollow valve needle with a pointing to a combustion chamber of the internal combustion engine valve needle head. Between the cavity of the valve needle and its outer periphery nozzle bores are provided, through which the fuel is injected in the open state of the injector into the combustion chamber. The injection valve opens by the valve needle is moved outwardly toward the combustion chamber, wherein a valve seat surface on the needle head lifts from a valve seat on a nozzle body. The instantaneous opening cross section of the nozzle holes is determined as a function of the needle stroke by a control edge on the inner edge of the valve seat of the nozzle body.

Das Einspritzventil besitzt zwei Reihen von steuerbaren Düsenlöchern, die in Bewegungsrichtung der Ventilnadel zueinander versetzt angeordnet sind. Die Düsenlöcher der einen Reihe unterscheiden sich von den Düsenlöchern der anderen Reihe in ihrer Neigung zur Düsenachse und in ihrer Querschnittform, so dass die Gemischbildung im Brennraum in weiten Bereichen an die Betriebsparameter angepasst werden kann. Das Kraftstoffeinspritzventil ist eine Kombination aus einem Sitzventil, wodurch im geschlossenen Zustand ein Nachtropfen der Einspritzdüse verhindert wird und einem Schieberventil, wodurch die Einspritzmenge und Kraftstoffaufbereitung variiert werden kann. Wegen der Düsenbohrungen in der Ventilnadel müssen die Wände der Ventilnadeln eine ausreichende Stärke besitzen. Ferner erhöht der Ventilnadelkopf die Masse des Ventils, sodass neben der Komplexität der Einspritzdüse durch die Kombination zweier Steuermechanismen die Nadelansteuerung und Aktuatorik wegen der Masse der Düsennadel sehr aufwändig ist und zu Schaltgeräuschen führen kann. Außerdem ist ein solches System nicht für Einspritzdüsen mit nach innen öffnenden Düsennadeln möglich.The injection valve has two rows of controllable nozzle holes, which are arranged offset to one another in the direction of movement of the valve needle. The nozzle holes of one row differ from the nozzle holes of the other row in their inclination to the nozzle axis and in their cross-sectional shape, so that the mixture formation in the combustion chamber can be adapted to the operating parameters in a wide range. The fuel injector is a combination of a poppet valve which, when closed, prevents dripping of the injector and a spool valve, thereby varying the amount of fuel injected and fuel conditioning can. Because of the nozzle bores in the valve needle, the walls of the valve needles must have sufficient strength. Furthermore, the valve needle head increases the mass of the valve, so that in addition to the complexity of the injection nozzle by the combination of two control mechanisms, the needle drive and actuator because of the mass of the nozzle needle is very complex and can lead to switching noise. In addition, such a system is not possible for injectors with inwardly opening nozzle needles.

Aus der EP 0 713 967 A1 ist eine nach innen öffnende Einspritzdüse bekannt mit ebenfalls zwei Reihen von Düsenbohrungen, die in den Düsenkörper eingebracht sind und durch eine koaxial angeordnete Schiebehülse über ein entsprechendes stirnseitiges Sackloch und radial verlaufende Kraftstoffkanäle mit dem Kraftstoffdrucksystem verbunden werden können. Die Schiebehülse ist ein dickwandiges, zylindrisches Bauteil, das in den Düsenkörper axial verschiebbar, präzise eingepasst ist.From EP 0 713 967 A1 an inwardly opening injection nozzle is known with also two rows of nozzle bores which are introduced into the nozzle body and can be connected by a coaxially arranged sliding sleeve via a corresponding end blind hole and radially extending fuel channels with the fuel pressure system. The sliding sleeve is a thick-walled, cylindrical component, which is axially displaceable, precisely fitted into the nozzle body.

Aus der DE 41 19 402 A1 ist ein Schieberventil bekannt, bei dem in einem Steuerzylinder eine Schiebehülse axial verschiebbar angeordnet ist. Die Schiebehülse besitzt in der Stirnseite, die einem Druckmitteleingang des Steuerzylinders zugewandt ist, ein Sackloch, von dem aus radial verlaufende Druckmittelkanäle ausgehen. Diese münden an Steuerflächen am Umfang der Schiebehülse und stellen je nach Position der Schiebehülse eine Verbindung zwischen dem Druckmitteleingang und Arbeitsleitungen bzw. einem Rücklauf her. Die Schiebehülse besteht aus einem elastisch verformbaren Material, sodass die Steuerflächen an der Schiebehülse zum Steuerzylinder hin radial elastisch nachgiebig sind. Dadurch können sie ohne hohen Fertigungsaufwand für enge Passungen die Steueröffnungen im geschlossenen Zustand dicht abschließen. Hierbei ist es vorteilhaft, dass die Steuerflächen unter einer vorbestimmten Vorspannung am Steuerzylinder anliegen oder durch den Druck eines gesteuerten Mediums, eines Gases oder einer Flüssigkeit, gegen den Steuerzylinder gedrückt werden. Da der Anpressdruck mit steigendem Mediumdruck größer wird, dichtet das Schieberventil auch bei hohen Mediendrücken sicher ab.From DE 41 19 402 A1 a slide valve is known in which a sliding sleeve is arranged axially displaceable in a control cylinder. The sliding sleeve has in the end face, which faces a pressure medium input of the control cylinder, a blind hole, emanating from the radially extending pressure medium channels. These lead to control surfaces on the circumference of the sliding sleeve and depending on the position of the sliding sleeve a connection between the pressure medium input and working lines or a return ago. The sliding sleeve consists of an elastically deformable material, so that the control surfaces on the sliding sleeve to the control cylinder are radially resiliently yielding. As a result, they can tightly close the control openings in the closed state without high production costs for close fits. In this case, it is advantageous for the control surfaces to rest against the control cylinder under a predetermined pretension by the pressure of a controlled medium, a gas or a liquid, are pressed against the control cylinder. Since the contact pressure increases with increasing medium pressure, the gate valve reliably seals even at high media pressures.

Der Erfindung liegt die Aufgabe zugrunde, ein dicht schließendes Schieberventil zu vereinfachen und die Masse der bewegten Teile zu verringern. Sie wird gemäß der Erfindung durch die Merkmale des Anspruchs 1 gelöst. Weitere vorteilhafte Ausgestaltungen ergeben sich aus den Unteransprüchen.The invention has for its object to simplify a tight-fitting slide valve and to reduce the mass of the moving parts. It is achieved according to the invention by the features of claim 1. Further advantageous embodiments will be apparent from the dependent claims.

Nach der Erfindung weist die Schiebehülse im Bereich der Steuerfläche mindestens einen Längsschlitz auf, sodass die Steuerfläche radial nachgeben kann. Sind mehrere -Steuerflächen über den Umfang verteilt mehreren Steueröffnungen zugeordnet, werden entsprechend viele Längsschlitze vorgesehen, die zwischen sich Federzungen bilden, an denen die Steuerflächen angeordnet sind. Wenn die Längsschlitze bis zur Stirnseite der Schiebehülse durchgeführt sind, ist es vorteilhaft, die Steuerflächen am Ende der so gebildeten Federzungen anzuordnen. Durch die geometrische Gestaltung der Federzungen kann deren Federcharakteristik beeinflusst und auf den Einsatzfall abgestimmt werden.According to the invention, the sliding sleeve in the region of the control surface on at least one longitudinal slot, so that the control surface can yield radially. If a plurality of control surfaces distributed over the circumference assigned to a plurality of control openings, a corresponding number of longitudinal slots are provided which form between them spring tongues on which the control surfaces are arranged. If the longitudinal slots are carried out to the front side of the sliding sleeve, it is advantageous to arrange the control surfaces at the end of the spring tongues thus formed. Due to the geometric design of the spring tongues whose spring characteristics can be influenced and tailored to the application.

Da bei einem Kraftstoffeinspritzventil das Medium, nämlich der Kraftstoff unter hohem Druck durch den Hohlraum der Ventilnadel bzw. der Schiebehülse zugeführt wird, eignet sich ein solches Schieberventil insbesondere als Kraftstoffeinspritzventil; jedoch ist es gleichermaßen für andere Anwendungsfälle und zum Steuern von gasförmigen Medien geeignet. Das erfindungsgemäße Schieberventil zeichnet sich vor allem durch einen einfachen Aufbau, Leckagefreiheit und einer geringen Masse der bewegten Teile aus, wodurch sich der Aufwand für die Steuerung und Aktuatorik bei kurzen Ansprechzeiten verringert. Ferner werden Schaltgeräusche vermieden.Since in a fuel injection valve, the medium, namely the fuel is supplied under high pressure through the cavity of the valve needle or the sliding sleeve, such a slide valve is particularly suitable as a fuel injection valve; however, it is equally suitable for other applications and for controlling gaseous media. The slide valve according to the invention is characterized mainly by a simple design, freedom from leaks and a low mass of the moving parts, which reduces the cost of the control and Aktuatorik with short response times. Furthermore, switching noises are avoided.

Zweckmäßigerweise werden die Federzungen im Bereich der Steuerflächen verstärkt. Dadurch erhalten die Steuerflächen eine ausreichende Formstabilität, sodass sie sich dicht an die Steueröffnungen anlegen können.Conveniently, the spring tongues are reinforced in the area of the control surfaces. This gives the control surfaces a sufficient dimensional stability, so that they can invest close to the control openings.

Um die Montage des Schieberventils zu vereinfachen, wird es zweckmäßigerweise in einer Cartridge-Bauweise ausgeführt. Ferner kann die Schiebehülse aus magnetisch leitendem Material hergestellt sein und ihr oberer Teil gleichzeitig als Anker eines Magnetkreises dienen. Dadurch erreicht man eine vereinfachte, kompakt bauende Aktuatorik.To simplify the assembly of the slide valve, it is expediently carried out in a cartridge construction. Furthermore, the sliding sleeve can be made of magnetically conductive material and serve its upper part at the same time as an armature of a magnetic circuit. This achieves a simplified, compact design actuators.

Damit die Steuerflächen der Schiebehülse den Steueröffnungen eindeutig zugeordnet sind, ist es zweckmäßig, die Schiebehülse während ihrer Axialbewegung gegen Verdrehen zu sichern oder in der Drehbewegung zwangsweise zu führen. Dies kann z.B. dadurch geschehen, dass die Schiebehülse oder ein mit ihr verbundenes Teil ein von der Kreisform abweichendes Querschnittprofil aufweist, das in einer passenden Führung des Ventilkörpers geführt ist. Ein solches Profil könnte z.B. ein Vielkantprofil sein. Ferner könnte die Schiebehülse in einem Steilgewinde geführt sein.Thus, the control surfaces of the sliding sleeve are assigned to the control openings clearly, it is expedient to secure the sliding sleeve during its axial movement against rotation or forcibly guide in the rotational movement. This can e.g. be done by the sliding sleeve or a part connected to it has a deviating from the circular cross-sectional profile, which is guided in a matching guide of the valve body. Such a profile could e.g. be a polygonal profile. Furthermore, the sliding sleeve could be guided in a coarse thread.

Weitere Vorteile ergeben sich aus der folgenden Zeichnungsbeschreibung. In der Zeichnung ist ein Ausführungsbeispiel der Erfindung dargestellt. Die Zeichnung, die Beschreibung und die Ansprüche enthalten zahlreiche Merkmale in Kombination.Further advantages emerge from the following description of the drawing. In the drawing, an embodiment of the invention is shown. The drawing, the description and the claims contain numerous features in combination.

Dabei zeigen:

Fig. 1
einen schematischen Längsschnitt durch ein erfindungsgemäßes Schieberventil und
Fig. 2
eine perspektivische Ausschnittsvergrößerung einer Variante nach Fig. 1 mit zwei Reihen Düsenbohrungen.
Showing:
Fig. 1
a schematic longitudinal section through an inventive slide valve and
Fig. 2
an enlarged perspective view of a variant of FIG. 1 with two rows of nozzle holes.

Ein Schieberventil 10 in Form eines Kraftstoffeinspritzventils für eine Brennkraftmaschine besitzt ein Ventilgehäuse 11, in dem eine Schiebehülse 12 in einem Steuerzylinder 13 axial in Bewegungsrichtung 29 verschiebbar geführt ist. Die Schiebehülse 12 ist durch einen Querstift 15, der in einer Querbohrung 16 der Schiebehülse 12 eingesetzt ist, mit einer Ventilstange 14 verbunden. Diese wird von einer nicht näher dargestellten Aktuatorik, z.B. von einem Elektromagneten, betätigt. Dabei können die Schiebehülse 12 und ihr oberer Teil 27 aus magnetischem Werkstoff hergestellt werden und als Magnetanker ausgebildet sein.A slide valve 10 in the form of a fuel injection valve for an internal combustion engine has a valve housing 11, in which a sliding sleeve 12 in a control cylinder 13 is axially displaceable in the direction of movement 29. The sliding sleeve 12 is connected by a transverse pin 15 which is inserted in a transverse bore 16 of the sliding sleeve 12, with a valve rod 14. This is actuated by an actuator, not shown, for example, by an electromagnet. In this case, the sliding sleeve 12 and its upper part 27 can be made of magnetic material and be designed as a magnetic armature.

Die Schiebehülse 12 weist von ihrem freien Ende ausgehend Längsschlitze 24 auf, die über den Umfang verteilt sind und zwischen sich Federzungen 25 bilden, an deren Enden am äußeren Umfang Steuerflächen 23 angeordnet sind, die mit Steueröffnungen 17, 18 im Steuerzylinder 13 zusammenwirken. An die Steueröffnungen 17, 18 schließen sich nach außen gerichtete Düsenbohrungen 19, 20 an. Diese sind in Bewegungsrichtung 29 der Schiebehülse 12 versetzt zueinander angeordnet. Im geschlossenen Zustand des Schieberventils 10 überdecken die Steuerflächen 23 die Steueröffnungen 17, 18. Dabei kann eine Steuerfläche 23 mit einer oder mehreren Steueröffnungen 17, 18 zusammenwirken. Durch die Bewegung der Schiebehülse 12 in eine Richtung, wird zunächst die entsprechende Steueröffnung 17 oder 18 freigegeben und bei einem weiteren Verstellen Schiebehülse 12 die bisher verschlossen gebliebene Steueröffnung 17 oder 18. Somit kann die Schiebehülse 12 mehrere Steueröffnungen 17 oder 18 wechselweise oder nacheinander mehr oder weniger aufsteuern.The sliding sleeve 12 has, starting from its free end, longitudinal slots 24 which are distributed over the circumference and form between them spring tongues 25, at whose ends on the outer circumference control surfaces 23 are arranged, which cooperate with control openings 17, 18 in the control cylinder 13. The control openings 17, 18 are followed by outwardly directed nozzle bores 19, 20. These are offset in the direction of movement 29 of the sliding sleeve 12 to each other. In the closed state of the slide valve 10, the control surfaces 23 cover the control openings 17, 18. In this case, a control surface 23 with one or more control openings 17, 18 cooperate. By the movement of the sliding sleeve 12 in one direction, first the corresponding control opening 17 or 18 is released and in a further adjustment sliding sleeve 12 the previously closed control opening 17 or 18. Thus, the sliding sleeve 12 more control openings 17 or 18 alternately or successively more or drive less.

Im Bereich 26 der Steuerflächen 23 sind die Federzungen 25 verstärkt, so dass durch die erhöhte Formsteifigkeit die Steuerflächen 23 dicht an den Steueröffnungen 17, 18 anliegen und diese leckagefrei abschließen. Der Druck, mit dem die Steuerflächen 23 an den Steueröffnungen 17, 18 anliegen, kann durch eine bestimmte Vorspannung der Federzungen 25 erreicht werden oder durch den Druck des zu steuernden Mediums. Dieses wird durch einen Hohlraum 22 der Schiebehülse 12 zentral zugeführt und durch die Düsenbohrungen 19, 20 gefördert. Der Steuerzylinder 13 schließt stirnseitig mit dem Sackloch 21 ab. Zweckmäßigerweise werden die Federzungen 25 um einen vorgegebenen Betrag nach außen vorgebogen. Ferner kann die Federcharakteristik durch die Werkstoffauswahl und die geometrische Gestaltung bestimmt werden. Um die Schiebehülse gut montieren zu können, besitzt das Ventilgehäuse 11 zum Steuerzylinder 13 hin einen konischen Bereich 28, durch den die Federzungen 25 auf das Maß des Steuerzylinders 13 zurück gedrückt werden.In the area 26 of the control surfaces 23, the spring tongues 25 are reinforced, so that the control surfaces 23 abut tightly against the control openings 17, 18 due to the increased stiffness of form and close them without leakage. The pressure with which the control surfaces 23 abut the control openings 17, 18 can be achieved by a specific bias of the spring tongues 25 or by the pressure of the medium to be controlled. This is supplied centrally through a cavity 22 of the sliding sleeve 12 and conveyed through the nozzle bores 19, 20. The control cylinder 13 closes the front side with the blind hole 21. Conveniently, the spring tongues 25 are pre-bent by a predetermined amount to the outside. Furthermore, the spring characteristic can be determined by the material selection and the geometric design. To the sliding sleeve well To mount, the valve housing 11 has the control cylinder 13 through a conical portion 28 through which the spring tongues 25 are pressed back to the dimension of the control cylinder 13.

Die Ausführung nach Fig. 2, die im wesentlichen einen Ausschnitt der Fig. 1 in vergrößertem Maßstab darstellt, zeigt zwei Reihen von Düsenbohrungen 19, 20, die in Bewegungsrichtung 29 und/oder in Umfangsrichtung versetzt zueinander angeordnet sind. Die Düsenbohrungen 19, 20 können zur Bewegungsrichtung 29 eine unterschiedliche Neigung aufweisen und außerdem unterschiedliche Querschnittprofile besitzen, wie es an sich bei Kraftstoffeinspritzventilen der eingangs erwähnten Art bekannt ist.The embodiment of Fig. 2, which is a section of FIG. 1 in an enlarged scale substantially shows two rows of nozzle bores 19, 20 which are arranged offset in the direction of movement 29 and / or in the circumferential direction to each other. The nozzle bores 19, 20 may have a different inclination to the direction of movement 29 and also have different cross-sectional profiles, as is known per se in fuel injection valves of the type mentioned.

Claims (11)

  1. Sliding valve having a sliding sleeve which is axially displaceable in a control cylinder and which controls, with at least one control face on its outer periphery, at least one control opening in the control cylinder, the control face (23) being radially elastically flexible in the direction of the control cylinder (13) and bearing against the control cylinder (13), characterized in that the sliding sleeve (12), in the region of the control face (23), has at least one longitudinal slot (24).
  2. Sliding valve according to Claim 1, characterized in that a plurality of longitudinal slots (24) are provided, which form between them spring tongues (25), on which the control faces (23) are disposed.
  3. Sliding valve according to Claim 2, characterized in that the spring tongues (25) are reinforced in the region (26) of the control faces (23).
  4. Sliding valve according to one of the preceding claims, characterized in that the control face (23) is forced against the control cylinder (13) by the pressure of a controlled medium.
  5. Sliding valve according to one of the preceding claims, characterized in that it is realized in cartridge construction.
  6. Sliding valve according to one of the preceding claims, characterized in that the sliding sleeve (12) is made of magnetically conductive material and its top part (27) simultaneously serves as the armature of a magnetic circuit.
  7. Sliding valve according to one of the preceding claims, characterized in that the sliding sleeve (12) is guided in the control cylinder (13) in a torsionally secure manner.
  8. Sliding valve according to one of the preceding claims, characterized in that the control cylinder (13) has a conical region (28) for the threading of the sliding sleeve (12).
  9. Sliding valve according to one of the preceding claims, characterized in that it is a fuel injection valve for an internal combustion engine.
  10. Sliding valve according to one of the preceding claims, characterized in that in the control cylinder (13) there are provided at least two axially offset control openings (17, 18), having adjoining nozzle bores (19, 20).
  11. Sliding valve according to Claim 10, characterized in that at least two nozzle bores (19, 20) differ in relation to their position and/or shape.
EP03776910A 2002-12-20 2003-11-19 Sliding valve Expired - Fee Related EP1576281B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10261175A DE10261175A1 (en) 2002-12-20 2002-12-20 spool valve
DE10261175 2002-12-20
PCT/EP2003/012936 WO2004059161A1 (en) 2002-12-20 2003-11-19 Sliding valve

Publications (2)

Publication Number Publication Date
EP1576281A1 EP1576281A1 (en) 2005-09-21
EP1576281B1 true EP1576281B1 (en) 2006-06-07

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Family Applications (1)

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EP03776910A Expired - Fee Related EP1576281B1 (en) 2002-12-20 2003-11-19 Sliding valve

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US (1) US20060124763A1 (en)
EP (1) EP1576281B1 (en)
JP (1) JP4232041B2 (en)
DE (2) DE10261175A1 (en)
WO (1) WO2004059161A1 (en)

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CN105465412A (en) * 2015-02-17 2016-04-06 江苏瑞朗博机械设备有限公司 Pressure bar destabilizing trigger type reversing valve
CN105387245B (en) * 2015-12-16 2017-09-29 日照海卓液压有限公司 Six five logical logic selector valves
US10337448B2 (en) * 2015-12-22 2019-07-02 Ford Global Technologies, Llc Methods and systems for a fuel injector assembly
US10570865B2 (en) * 2016-11-08 2020-02-25 Ford Global Technologies, Llc Fuel injector with variable flow direction
CN114483383B (en) * 2022-01-28 2023-07-21 刘义亭 Gaseous fuel injector

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Also Published As

Publication number Publication date
DE50303752D1 (en) 2006-07-20
WO2004059161A1 (en) 2004-07-15
JP2006510846A (en) 2006-03-30
US20060124763A1 (en) 2006-06-15
DE10261175A1 (en) 2004-07-08
JP4232041B2 (en) 2009-03-04
EP1576281A1 (en) 2005-09-21

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