EP1043497A2 - Control valve - Google Patents

Control valve Download PDF

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Publication number
EP1043497A2
EP1043497A2 EP00107266A EP00107266A EP1043497A2 EP 1043497 A2 EP1043497 A2 EP 1043497A2 EP 00107266 A EP00107266 A EP 00107266A EP 00107266 A EP00107266 A EP 00107266A EP 1043497 A2 EP1043497 A2 EP 1043497A2
Authority
EP
European Patent Office
Prior art keywords
valve
flow channel
valve plate
mouth
plate
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
EP00107266A
Other languages
German (de)
French (fr)
Other versions
EP1043497A3 (en
EP1043497B1 (en
Inventor
Tsutomu Fuseya
Mahoro Fujita
Hermann Breitbach
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.)
Isuzu Motors Ltd
Delphi Technologies Inc
Original Assignee
Isuzu Motors Ltd
Delphi Technologies Inc
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.)
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Publication date
Application filed by Isuzu Motors Ltd, Delphi Technologies Inc filed Critical Isuzu Motors Ltd
Publication of EP1043497A2 publication Critical patent/EP1043497A2/en
Publication of EP1043497A3 publication Critical patent/EP1043497A3/en
Application granted granted Critical
Publication of EP1043497B1 publication Critical patent/EP1043497B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02MSUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M47/00Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure
    • F02M47/02Fuel-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
    • F02M47/027Electrically actuated valves draining the chamber to release the closing pressure
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02MSUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M63/00Other 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
    • F02M63/0012Valves
    • F02M63/0031Valves characterized by the type of valves, e.g. special valve member details, valve seat details, valve housing details
    • F02M63/0033Lift valves, i.e. having a valve member that moves perpendicularly to the plane of the valve seat
    • F02M63/0036Lift valves, i.e. having a valve member that moves perpendicularly to the plane of the valve seat with spherical or partly spherical shaped valve member ends
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02MSUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M2200/00Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/30Fuel-injection apparatus having mechanical parts, the movement of which is damped
    • F02M2200/304Fuel-injection apparatus having mechanical parts, the movement of which is damped using hydraulic means
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10STECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S239/00Fluid sprinkling, spraying, and diffusing
    • Y10S239/90Electromagnetically actuated fuel injector having ball and seat type valve

Definitions

  • the invention relates to a switching valve, in particular for actuating a Injection valve in an internal combustion engine, with a valve body, in which a flow channel is formed which has one end in opens a work space, and with one recorded in the work space Valve plate between a closed position and a Release position is movable.
  • the invention further relates to an injection valve such a switching valve.
  • Such a switching valve is known and is used in particular for actuation of valves, such as injection valves in internal combustion engines, used.
  • the shaft valve has one Flow channel on, one end of which with a pressure chamber of the actuating valve can be connected.
  • the other end of the flow channel opens into a work space provided on the switching valve, in which a valve plate for closing the flow channel is arranged.
  • the valve plate can be between a closed position and a release position can be moved back and forth.
  • the known switching valve is used in an injection valve in a diesel engine used to determine the injection timing and the injection duration of the to determine the fuel to be injected through the injection valve can.
  • To close the injector of the injector is one in a needle guide slidably mounted nozzle needle provided between the injector and the pressure chamber with which the flow channel of the switching valve is connected, hydraulically clamped is that the nozzle needle keeps the injector closed. By opening the flow channel, this relaxes in the pressure chamber fluid present, so that the nozzle needle releases the injection nozzle.
  • To the closing of the flow channel builds up inside the pressure chamber pressure again, through which the nozzle needle returns to its die Injector closing position is moved.
  • the mouth of the flow channel closed by the separate closing element which between the valve plate and the mouth of the flow channel is. If the valve plate is moved to the release position, that is because Closing element without pre-tension at the mouth of the flow channel on, so that the fluid past the closing element from or into the flow channel can flow.
  • the valve plate is returned to its closed position moves, she takes the closing element, which in turn turns on aligns the mouth of the flow channel and closes it as soon as the valve plate has reached its final closed position.
  • the closing element can move relative to the valve plate is an exact one Guiding and positioning of the valve plate relative to the mouth of the Flow channel no longer required, so that both the valve plate as well as the guide for the valve plate can be made less precisely must than with the known switching valves.
  • the Freedom of movement of the closing element relative to the mouth of the flow channel achieved that the closing element by the inflowing or flowing fluid is moved to a position in which it is even rests against the mouth and seals it properly as soon as it is pressed against the mouth by the valve plate and closes it.
  • valve ball As the closing element, due to their spherical shape in any position relative to the mouth of the flow channel at the mouth is linear.
  • the valve plate preferably has a Recess for the closing element on the mouth of the flow channel is aligned.
  • the recess and the mouth Form the recess and / or the mouth conically.
  • the depth of the The mouth is larger than the stroke of the valve plate. So that the closing element, for example a bullet held in the mouth. At the same time the closing element in the mouth can be parallel to the valve plate move so that it can center in the mouth.
  • the closing element evenly on the wall of the recess created and held in a defined position.
  • a conical recess and one with a conical is suitable Sealing surface provided mouth when using a valve ball as Closing element that is special due to its surface curvature well on the inclined walls of the recess and the mouth hugs.
  • Switch valves are on the inner surface facing the flow channel of the work space provided resilient elements on the valve plate are attached and guide them, so that a displacement of the valve plate is prevented transversely to their direction of movement.
  • the valve plate is preferably in its closed position by a compression spring held and with the help of an actuator in their release position moves, since it is ensured that the switching valve in the event of a failure of the Actuator remains closed.
  • the switching valve according to the invention is the working area by a one or multi-part valve body, a ring adjacent to the valve body and an adjacent ring Disc limited.
  • the geometry of the valve body is preferably such that the Valve plate in its closed position on the out of the through opening protruding closing element sealingly abuts when it muzzle closes the flow channel but does not lie against the valve body, so that there is a gap between the valve plate and the valve body remains. This ensures that the total closing force the valve plate is only transferred to the closing element, whereby a particularly good sealing effect can be achieved.
  • the fluid from the Gap between the valve plate and the valve body are promoted, which slightly slows the closing movement of the valve plate and any oscillating movements of the valve plate that occur after the impact on the closing element by springing back of the valve plate arise, be dampened.
  • the figure shows a switching valve 10 in a sectional side view.
  • the switching valve 10 is on a holding body 12 of an injection valve 14 arranged.
  • In the holding body 12 is a extending in the longitudinal direction Through hole 16 formed on the in the figure End face of the holding body 12 shown above ends.
  • a piston 18 is inserted along the through hole 16 can be moved back and forth and with one end (not shown) on the end face of a nozzle needle (not shown) with which the injection nozzle (not shown) of the injection valve 14 can be locked.
  • valve body 20 In the valve body 20 is an extending in the longitudinal direction Flow channel 24 formed, which with the high pressure chamber 22 in connection stands and in one on the injection valve 14 facing away from the end face of the valve body 20 shown above conical sealing surface 26 ends.
  • a collar 28 On the upper face of the valve body 20 is a collar 28 is formed, which protrudes in the radial direction and in the middle of which is arranged concentrically to the conical sealing surface 26 Through opening 30 is formed.
  • the injector 14 flat side of the collar 28 facing away is in turn on a ring 32, which is also arranged concentrically to the conical sealing surface 26.
  • the ring 32 is covered by a circular disk 34, the one has through opening 36 in its center.
  • At the injector 14 facing away from the flat side of the second disc 34 are one annular magnet coil 38 and a hollow cylindrical housing 40 provided, both of which are arranged concentrically around the opening 36.
  • the collar 28, the ring 32 and the disc 34 delimit a working space 42, in which a circular valve plate 44 is received the front of the valve body 20 facing one to the conical Sealing surface 26 aligned recess 46 is formed has a frustoconical cross-sectional shape. Furthermore are with connected to the rear of the valve plate 44 a plurality of resilient elements 48, which protrude downward from the disk 34 and the valve plate 44 hold concentric to the conical sealing surface 26 in a defined position. Between the recess 46 of the valve plate 44 and the conical Sealing surface 26 is arranged a valve ball 50 with which the flow channel 24 can be closed.
  • the valve plate 44 is driven by the force F of a compression spring (not shown) held in a closed position in which it is under tension the valve ball 50 abuts and against the conical sealing surface 26 presses so that the flow channel 24 is closed in a fluid-tight manner.
  • a compression spring (not shown) held in a closed position in which it is under tension the valve ball 50 abuts and against the conical sealing surface 26 presses so that the flow channel 24 is closed in a fluid-tight manner.
  • To the Opening the flow channel 24 can be that of a ferromagnetic Material manufactured valve plate 44 using the solenoid 38 against the Force of the compression spring and the resilient elements 48 into a release position in which the valve plate 44 and the valve ball 50 are lifted off the valve body 20.
  • the maximum stroke of the valve plate 44 by the height of the ring 32 in the direction of movement of the valve plate 44 is predetermined, is dimensioned so that the Valve ball 50 between the recess 46 and the conical sealing surface 26 can move freely, a jumping out of the valve ball 50 from the Recess 46 and the conical sealing surface 26 is prevented.
  • the solenoid 38 moves the ferromagnetic valve plate 44 against the force of the compression spring in their release position, whereby the valve ball 50 is released becomes. Due to the pressure acting in the high-pressure chamber 22, the valve ball 50 lifted off so that the flow channel 24 is no longer closed is and the fuel located in the high pressure chamber 22 through the flow channel 24 flows into the working space 42 from which it escapes into a leak fuel line via the opening 36 in the disk 34. Due to the falling pressure in the high pressure chamber 22, the the force exerted on the piston 18 on the nozzle needle is so small that the nozzle needle due to the fuel under high pressure at the injection nozzle is raised and the piston 18 in the direction of the switching valve 10 moves. At the same time, the nozzle needle opens the injection nozzle, see above that the fuel enters the cylinder of the engine.
  • valve plate 44 As soon as the injection control deactivates the magnet coil 38, the Valve plate 44 by the force of the compression spring and the resilient elements 48 moved back to its closed position, in which the valve ball 50 presses against the conical sealing surface 26, which the flow channel 24th closes again.
  • the movement of the valve plate 44 is characterized by the the gap between the valve plate 44 and the collar 28 of the valve body 20 fuel to be displaced damped the closing movement the valve plate 44 slows down, causing the valve plate to spring back 44 effectively prevented after impacting the valve ball 50 becomes.

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  • 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)
  • Multiple-Way Valves (AREA)
  • Sliding Valves (AREA)

Abstract

The switching valve (10) has a valve body (20), in which there is a flow channel (24), one end of which comes out in a worki cavity (42). This cavity contains a valve plate (44) which can moved between closed and open positions. A closing element (50) i fitted between the valve plate and the mouth of the flow channel, closing it when the valve plate is in the closed position.

Description

Die Erfindung betrifft ein Schaltventil, insbesondere zum Betätigen eines Einspritzventils in einer Verbrennungskraftmaschine, mit einem Ventilkörper, in dem ein Strömungskanal ausgebildet ist, der mit einem Ende in einen Arbeitsraum mündet, und mit einer in dem Arbeitsraum aufgenommenen Ventilplatte, die zwischen einer Schließstellung und einer Freigabestellung bewegbar ist. Ferner betrifft die Erfindung ein Einspritzventilmit einem derartigen Schaltventil.The invention relates to a switching valve, in particular for actuating a Injection valve in an internal combustion engine, with a valve body, in which a flow channel is formed which has one end in opens a work space, and with one recorded in the work space Valve plate between a closed position and a Release position is movable. The invention further relates to an injection valve such a switching valve.

Ein derartiges Schaltventil ist bekannt und wird insbesondere zum Betätigen von Ventilen, wie beispielsweise Einspritzventilen in Verbrennungskraftmaschinen, verwendet. Zu diesem Zweck weist das Schaftventil einen Strömungskanal auf, dessen eines Ende mit einem Druckraum des zu betätigenden Ventils verbunden werden kann. Das andere Ende des Strömungskanales mündet in einen am Schaltventil vorgesehenen Arbeitsraum, in dem eine Ventilplatte zum Verschließen des Strömungskanals angeordnet ist. Die Ventilplatte kann zwischen einer Schließstellung und einer Freigabestellung hin und her bewegt werden. Durch Öffnen des Strömungskanales kann der Druckraum des zu betätigenden Ventils beispielsweise mit einer Abströmleitung oder mit der Umgebung verbunden werden. Such a switching valve is known and is used in particular for actuation of valves, such as injection valves in internal combustion engines, used. For this purpose, the shaft valve has one Flow channel on, one end of which with a pressure chamber of the actuating valve can be connected. The other end of the flow channel opens into a work space provided on the switching valve, in which a valve plate for closing the flow channel is arranged. The valve plate can be between a closed position and a release position can be moved back and forth. By opening the Flow channel can be the pressure chamber of the valve to be actuated, for example connected to a discharge line or to the environment become.

Das bekannte Schaltventil wird bei einem Einspritzventil in einem Dieselmotor verwendet, um den Einspritzzeitpunkt und die Einspritzdauer des durch das Einspritzventil einzuspritzenden Kraftstoffes bestimmen zu können. Zum Verschließen der Einspritzdüse des Einspritzventils ist eine in einer Nadelführung verschieblich gelagerte Düsennadel vorgesehen, die zwischen der Einspritzdüse und dem Druckraum, mit dem der Strömungskanal des Schaltventils verbunden ist, derart hydraulisch eingespannt ist, daß die Düsennadel die Einspritzdüse verschlossen hält. Durch Öffnen des Strömungskanales entspannt sich das im Druckraum befindliche Fluid, so daß die Düsennadel die Einspritzdüse freigibt. Nach dem Schließen des Strömungskanales baut sich im Inneren des Druckraumes erneut Druck auf, durch den die Düsennadel wieder in ihre die Einspritzdüse verschließende Stellung bewegt wird.The known switching valve is used in an injection valve in a diesel engine used to determine the injection timing and the injection duration of the to determine the fuel to be injected through the injection valve can. To close the injector of the injector is one in a needle guide slidably mounted nozzle needle provided between the injector and the pressure chamber with which the flow channel of the switching valve is connected, hydraulically clamped is that the nozzle needle keeps the injector closed. By opening the flow channel, this relaxes in the pressure chamber fluid present, so that the nozzle needle releases the injection nozzle. To the closing of the flow channel builds up inside the pressure chamber pressure again, through which the nozzle needle returns to its die Injector closing position is moved.

Es ist Aufgabe der Erfindung, ein Schaltventil bzw. ein Einspritzventil mit einem derartigen Schaltventil anzugeben, das bzw. bei dem das Schaltventil einfach herzustellen ist und den Strömungskanal mit einfachen Mitteln ordnungsgemäß abdichtet.It is an object of the invention to have a switching valve or an injection valve to specify such a switching valve, or the switching valve is easy to manufacture and the flow channel with simple Seals properly.

Diese Aufgabe wird bei einem Schaltventil der eingangs genannten Art dadurch gelöst, daß zwischen der Ventilplatte und der Mündung des Strömungskanales ein Schließelement angeordnet ist, das diese verschließt, wenn sich die Ventilplatte in ihrer Schließstellung befindet.This object is achieved in a switching valve of the type mentioned solved that between the valve plate and the mouth of the flow channel a closing element is arranged that closes it, when the valve plate is in its closed position.

Bei dem erfindungsgemäßen Schaltventil wird die Mündung des Strömungskanales durch das separate Schließelement verschlossen, das zwischen der Ventilplatte und der Mündung des Strömungskanales angeordnet ist. Wird die Ventilplatte in die Freigabestellung bewegt, liegt das Schließelement ohne Vorspannung an der Mündung des Strömungskanales an, so daß das Fluid am Schließelement vorbei aus bzw. in den Strömungskanal strömen kann. Wird die Ventilplatte wieder in ihre Schließstellung bewegt, nimmt sie das Schließelement mit, das sich seinerseits an der Mündung des Strömungskanales ausrichtet und diese verschließt, sobald die Ventilplatte in ihrer endgültigen Schließstellung angelangt ist. Da sich das Schließelement relativ zur Ventilplatte bewegen kann, ist eine exakte Führung und Positionierung der Ventilplatte relativ zur Mündung des Strömungskanales nicht mehr erforderlich, so daß sowohl die Ventilplatte als auch die Führung für die Ventilplatte weniger genau gefertigt sein müssen als bei den bekannten Schaltventilen. Gleichzeitig wird durch die Bewegungsfreiheit des Schließelementes relativ zur Mündung des Strömungskanales erreicht, daß das Schließelement durch das einströmende bzw. ausströmende Fluid in eine Position bewegt wird, in der es gleichmäßig an der Mündung anliegt und diese ordnungsgemäß abdichtet, sobald es von der Ventilplatte gegen die Mündung gedrückt wird und diese verschließt.In the switching valve according to the invention, the mouth of the flow channel closed by the separate closing element, which between the valve plate and the mouth of the flow channel is. If the valve plate is moved to the release position, that is because Closing element without pre-tension at the mouth of the flow channel on, so that the fluid past the closing element from or into the flow channel can flow. The valve plate is returned to its closed position moves, she takes the closing element, which in turn turns on aligns the mouth of the flow channel and closes it as soon as the valve plate has reached its final closed position. There the closing element can move relative to the valve plate is an exact one Guiding and positioning of the valve plate relative to the mouth of the Flow channel no longer required, so that both the valve plate as well as the guide for the valve plate can be made less precisely must than with the known switching valves. At the same time, the Freedom of movement of the closing element relative to the mouth of the flow channel achieved that the closing element by the inflowing or flowing fluid is moved to a position in which it is even rests against the mouth and seals it properly as soon as it is pressed against the mouth by the valve plate and closes it.

Vorteilhafte Weiterbildungen der Erfindung ergeben sich aus der Beschreibung, der Zeichnung sowie den Unteransprüchen.Advantageous developments of the invention result from the description, the drawing and the subclaims.

So ist besonders vorteilhaft, als Schließelement eine Ventilkugel zu verwenden, die sich durch ihre Kugelform in jeder Lage relativ zur Mündung des Strömungskanales an der Mündung linienförmig anlegt.It is particularly advantageous to use a valve ball as the closing element, due to their spherical shape in any position relative to the mouth of the flow channel at the mouth is linear.

Damit das Schließelement, auch wenn die Ventilplatte in ihre Freigabestellung bewegt ist, in einer definierten Lage relativ zur Mündung des Strömungskanales gehalten ist, weist die Ventilplatte vorzugsweise eine Ausnehmung für das Schließelement auf, die zur Mündung des Strömungskanales ausgerichtet ist. Um das Schließelement besser in der Ausnehmung und der Mündung zu halten, wird ferner vorgeschlagen, die Ausnehmung und/oder die Mündung konisch auszubilden. Die Tiefe der Mündung ist größer als der Hub der Ventilplatte. Damit wird das Schließelement, zum Beispiel eine Kugel, in der Mündung gehalten. Gleichzeitig kann sich das Schließelement in der Mündung parallel zur Ventilplatte bewegen, so daß sie sich in der Mündung zentrieren kann. Durch die konische Querschnittsform der Ausnehmung bzw. der Mündung wird erreicht, daß sich das Schließelement gleichmäßig an die Wand der Ausnehmung anlegt und in einer definierten Lage gehalten wird. Insbesondere eignet sich eine konische Ausnehmung und eine mit einer konischen Dichtfläche versehene Mündung bei der Verwendung einer Ventilkugel als Schließelement, die sich aufgrund ihrer Oberflächenkrümmung besonders gut an die geneigt verlaufenden Wände der Ausnehmung und der Mündung anschmiegt.So that the closing element, even when the valve plate is in its release position is moved, in a defined position relative to the mouth of the Is held flow channel, the valve plate preferably has a Recess for the closing element on the mouth of the flow channel is aligned. To make the closing element better in the It is also proposed to keep the recess and the mouth Form the recess and / or the mouth conically. The depth of the The mouth is larger than the stroke of the valve plate. So that the closing element, for example a bullet held in the mouth. At the same time the closing element in the mouth can be parallel to the valve plate move so that it can center in the mouth. Through the conical Cross-sectional shape of the recess or mouth is achieved that the closing element evenly on the wall of the recess created and held in a defined position. In particular a conical recess and one with a conical is suitable Sealing surface provided mouth when using a valve ball as Closing element that is special due to its surface curvature well on the inclined walls of the recess and the mouth hugs.

Bei einer besonders bevorzugten Ausführungsform des erfindungsgemäßen Schaltventils sind an der dem Strömungskanal zugewandten Innenfläche des Arbeitsraumes federnde Elemente vorgesehen, die an der Ventilplatte befestigt sind und diese führen, so daß eine Verlagerung der Ventilplatte quer zu ihrer Bewegungsrichtung verhindert ist. Durch die federnden Elemente wird die Ventilplatte in einer definierten Lage gehalten, ohne daß die Ventilplatte exakt geführt sein muß.In a particularly preferred embodiment of the invention Switch valves are on the inner surface facing the flow channel of the work space provided resilient elements on the valve plate are attached and guide them, so that a displacement of the valve plate is prevented transversely to their direction of movement. By the resilient Elements, the valve plate is held in a defined position, without the valve plate having to be guided exactly.

Die Ventilplatte wird vorzugsweise durch eine Druckfeder in ihrer Schließstellung gehalten und mit Hilfe eines Aktuators in ihre Freigabestellung bewegt, da so sichergestellt ist, daß das Schaltventil bei einem Ausfall des Aktuators geschlossen bleibt.The valve plate is preferably in its closed position by a compression spring held and with the help of an actuator in their release position moves, since it is ensured that the switching valve in the event of a failure of the Actuator remains closed.

Bei einer bevorzugten Ausführungsform des erfindungsgemäßen Schaltventils ist der Arbeitsraum durch einen ein- oder mehrteiligen Ventilkörper, einen am Ventilkörper anliegenden Ring und eine an diesem anliegende Scheibe begrenzt. Durch die Wahl der Materialstärke der Scheibe kann bei Verwendung eines Magneten als Aktuator die Haltekraft des Magneten beeinflußt werden, wenn dieser an der der Ventilplatte abgewandten Fläche der Scheibe angeordnet ist, da die Materialstärke der Scheibe den Abstand bzw. den Luftspalt der Ventilscheibe zum Magneten bestimmt.In a preferred embodiment of the switching valve according to the invention is the working area by a one or multi-part valve body, a ring adjacent to the valve body and an adjacent ring Disc limited. By choosing the material thickness of the pane can use the holding force of the magnet when using a magnet as an actuator be influenced if this on the side facing away from the valve plate Surface of the disc is arranged because of the material thickness of the disc determines the distance or the air gap of the valve disc to the magnet.

Die Geometrie des Ventilkörpers ist vorzugsweise so bemessen, daß die Ventilplatte in ihrer Schließstellung an dem aus der Durchgangsöffnung hervorstehenden Schließelement dichtend anliegt, wenn es die Mündung des Strömungskanals verschließt, ohne jedoch am Ventilkörper anzuliegen, so daß zwischen der Ventilplatte und dem Ventilkörper ein Spalt bestehen bleibt. Dadurch wird sichergestellt, daß die gesamte Schließkraft der Ventilplatte ausschließlich auf das Schließelement übertragen wird, wodurch eine besonders gute Dichtwirkung erzielt werden kann. Darüber hinaus muß bei der Schließbewegung der Ventilplatte das Fluid aus dem Spalt zwischen der Ventilplatte und dem Ventilkörper gefördert werden, wodurch die Schließbewegung der Ventilplatte leicht abgebremst wird und eventuell auftretende Schwingungsbewegungen der Ventilplatte, die nach dem Aufprall auf das Schließelement durch ein Zurückfedern der Ventilplatte entstehen, gedämpft werden. The geometry of the valve body is preferably such that the Valve plate in its closed position on the out of the through opening protruding closing element sealingly abuts when it muzzle closes the flow channel but does not lie against the valve body, so that there is a gap between the valve plate and the valve body remains. This ensures that the total closing force the valve plate is only transferred to the closing element, whereby a particularly good sealing effect can be achieved. About that in addition, the fluid from the Gap between the valve plate and the valve body are promoted, which slightly slows the closing movement of the valve plate and any oscillating movements of the valve plate that occur after the impact on the closing element by springing back of the valve plate arise, be dampened.

Das zuvor beschriebene Schaltventil kann insbesondere bei einem Einspritzventil zur Kraftstoffeinspritzung in einer Verbrennungskraftmaschine verwendet werden. Dabei steht der Strömungskanal mit einer Nadelführung in Verbindung, in der eine Düsennadel zum Verschließen der Einspritzdüse des Einspritzventils verschieblich aufgenommen ist. Nachfolgend wird die Erfindung anhand eines Ausführungsbeispieles unter Bezugnahme auf die Zeichnung näher erläutert. Es zeigt die einzige

Figur
eine geschnittene Seitenansicht eines erfindungsgemäßen Schaltventils zum Betätigen eines Einspritzventils.
The switching valve described above can be used in particular in an injection valve for fuel injection in an internal combustion engine. The flow channel is connected to a needle guide in which a nozzle needle for closing the injection nozzle of the injection valve is slidably received. The invention is explained in more detail below using an exemplary embodiment with reference to the drawing. It shows the only one
Figure
a sectional side view of a switching valve according to the invention for actuating an injection valve.

Die Figur zeigt ein Schaltventil 10 in einer geschnittenen Seitenansicht. Das Schaltventil 10 ist an einem Haltekörper 12 eines Einspritzventils 14 angeordnet. Im Haltekörper 12 ist eine sich in dessen Längsrichtung erstreckende Durchgangsbohrung 16 ausgebildet, die an der in der Figur oben gezeigten Stirnseite des Haltekörpers 12 endet. In die Durchgangsbohrung 16 ist ein Kolben 18 eingeführt, der längs der Durchgangsbohrung 16 hin und her bewegt werden kann und mit seiner einen Stirnseite (nicht dargestellt) an der Stirnseite einer Düsennadel (nicht dargestellt) anliegt, mit der die Einspritzdüse (nicht dargestellt) des Einspritzventils 14 verschlossen werden kann.The figure shows a switching valve 10 in a sectional side view. The switching valve 10 is on a holding body 12 of an injection valve 14 arranged. In the holding body 12 is a extending in the longitudinal direction Through hole 16 formed on the in the figure End face of the holding body 12 shown above ends. In the through hole 16, a piston 18 is inserted along the through hole 16 can be moved back and forth and with one end (not shown) on the end face of a nozzle needle (not shown) with which the injection nozzle (not shown) of the injection valve 14 can be locked.

Das Schaltventil 10 weist einen zylinderförmigen Ventilkörper 20 auf, der in die Durchgangsbohrung 16 des Haltekörpers 12 eingeführt ist. Die in die Durchgangsbohrung 16 zeigende Stirnseite des Ventilkörpers 20, der Innenumfang der Durchgangsbohrung 16 sowie die dem Ventilkörper 20 zugewandte Stirnseite des Kolbens 18 bilden einen Hochdruckraum 22, dessen Zweck später erläutert wird. Der Hochdruckraum 22 ist mit unter hohem Druck stehenden Kraftstoff gefüllt, der entlang der Düsennadel und des Kolbens 18 durch die Durchgangsbohrung 16 in den Hohlraum 22 gelangt ist.The switching valve 10 has a cylindrical valve body 20 which is inserted into the through hole 16 of the holding body 12. In the the through hole 16 end face of the valve body 20, the Inner circumference of the through bore 16 and that of the valve body 20 facing end of the piston 18 form a high pressure chamber 22, the purpose of which will be explained later. The high pressure chamber 22 is under high pressure fuel filled along the nozzle needle and the piston 18 through the through hole 16 into the cavity 22 has arrived.

Im Ventilkörper 20 ist ein sich in dessen Längsrichtung erstreckender Strömungskanal 24 ausgebildet, der mit dem Hochdruckraum 22 in Verbindung steht und in einer an der dem Einspritzventil 14 abgewandten, in der Figur oben dargestellten Stirnseite des Ventilkörpers 20 ausgebildeten konischen Dichtfläche 26 endet. An der oberen Stirnseite des Ventilkörpers 20 ist ein Bund 28 angeformt, der in radialer Richtung absteht und in dessen Mitte eine konzentrisch zur konischen Dichtfläche 26 angeordnete Durchgangsöffnung 30 ausgebildet ist. Die dem Einspritzventil 14 abgewandte Flachseite des Bundes 28 liegt ihrerseits an einem Ring 32, der gleichfalls konzentrisch zur konischen Dichtfläche 26 angeordnet ist. Der Ring 32 ist von einer kreisflächenförmigen Scheibe 34 bedeckt, die eine durchgängige Öffnung 36 in ihrer Mitte aufweist. An der dem Einspritzventil 14 abgewandten Flachseite der zweiten Scheibe 34 sind eine ringförmige Magnetspule 38 sowie ein hohlzylinderförmiges Gehäuse 40 vorgesehen, die beide konzentrisch um die Öffnung 36 angeordnet sind.In the valve body 20 is an extending in the longitudinal direction Flow channel 24 formed, which with the high pressure chamber 22 in connection stands and in one on the injection valve 14 facing away from the end face of the valve body 20 shown above conical sealing surface 26 ends. On the upper face of the valve body 20 is a collar 28 is formed, which protrudes in the radial direction and in the middle of which is arranged concentrically to the conical sealing surface 26 Through opening 30 is formed. The injector 14 flat side of the collar 28 facing away is in turn on a ring 32, which is also arranged concentrically to the conical sealing surface 26. The ring 32 is covered by a circular disk 34, the one has through opening 36 in its center. At the injector 14 facing away from the flat side of the second disc 34 are one annular magnet coil 38 and a hollow cylindrical housing 40 provided, both of which are arranged concentrically around the opening 36.

Der Bund 28, der Ring 32 und die Scheibe 34 begrenzen einen Arbeitsraum 42, in dem eine kreisförmige Ventilplatte 44 aufgenommen ist, an deren dem Ventilkörpers 20 zugewandten Vorderseite eine zu der konischen Dichtfläche 26 ausgerichtete Ausnehmung 46 ausgebildet ist, die eine kegelstumpfförmige Querschnittsform aufweist. Des weiteren sind mit der Rückseite der Ventilplatte 44 mehrere federnde Elemente 48 verbunden, die von der Scheibe 34 nach unten abstehen und die Ventilplatte 44 in einer definierten Lage konzentrisch zur konischen Dichtfläche 26 halten. Zwischen der Ausnehmung 46 der Ventilplatte 44 und der konischen Dichtfläche 26 ist eine Ventilkugel 50 angeordnet, mit der der Strömungskanal 24 verschlossen werden kann.The collar 28, the ring 32 and the disc 34 delimit a working space 42, in which a circular valve plate 44 is received the front of the valve body 20 facing one to the conical Sealing surface 26 aligned recess 46 is formed has a frustoconical cross-sectional shape. Furthermore are with connected to the rear of the valve plate 44 a plurality of resilient elements 48, which protrude downward from the disk 34 and the valve plate 44 hold concentric to the conical sealing surface 26 in a defined position. Between the recess 46 of the valve plate 44 and the conical Sealing surface 26 is arranged a valve ball 50 with which the flow channel 24 can be closed.

Die Ventilplatte 44 wird durch die Kraft F einer Druckfeder (nicht dargestellt) in einer Schließstellung gehalten, in der sie unter Vorspannung an der Ventilkugel 50 anliegt und diese gegen die konische Dichtfläche 26 drückt, damit der Strömungskanal 24 fluiddicht verschlossen ist. Um den Strömungskanal 24 zu öffnen, kann die aus einem ferromagnetischen Werkstoff gefertigte Ventilplatte 44 mit Hilfe der Magnetspule 38 gegen die Kraft der Druckfeder und der federnden Elemente 48 in eine Freigabestellung bewegt werden, in der die Ventilplatte 44 und die Ventilkugel 50 vom Ventilkörper 20 abgehoben sind. Der maximale Hub der Ventilplatte 44, die durch die Höhe des Ringes 32 in Bewegungsrichtung der Ventilplatte 44 gesehen vorgegeben ist, ist dabei so bemessen, daß sich die Ventilkugel 50 zwischen der Ausnehmung 46 und der konischen Dichtfläche 26 frei bewegen kann, ein Herausspringen der Ventilkugel 50 aus der Ausnehmung 46 und der konischen Dichtfläche 26 jedoch verhindert ist.The valve plate 44 is driven by the force F of a compression spring (not shown) held in a closed position in which it is under tension the valve ball 50 abuts and against the conical sealing surface 26 presses so that the flow channel 24 is closed in a fluid-tight manner. To the Opening the flow channel 24 can be that of a ferromagnetic Material manufactured valve plate 44 using the solenoid 38 against the Force of the compression spring and the resilient elements 48 into a release position in which the valve plate 44 and the valve ball 50 are lifted off the valve body 20. The maximum stroke of the valve plate 44 by the height of the ring 32 in the direction of movement of the valve plate 44 is predetermined, is dimensioned so that the Valve ball 50 between the recess 46 and the conical sealing surface 26 can move freely, a jumping out of the valve ball 50 from the Recess 46 and the conical sealing surface 26 is prevented.

Solange sich die Ventilplatte 44 in ihrer Schließstellung befindet, ist der Strömungskanal 24 durch die unter Vorspannung an der konischen Dichtfläche 26 anliegende Ventilkugel 50 verschlossen. Dadurch wird verhindert, daß der sich im Hochdruckraum 22 befindliche Kraftstoff über das Schaltventil 10 entweichen kann, so daß der Kolben 18 in seiner abgesenkten Position verharrt. In dieser Stellung hält der Kolben 18 die Düsennadel in einer Position, in der diese die Einspritzdüse verschließt, wobei die Düsennadel durch den an der Einspritzdüse anliegenden Druck des dem Einspritzventil 14 zugeführten Kraftstoffes gegen den Kolben 18 vorgespannt ist, also hydraulisch zwischen der Hochdruckkammer 22 und der Einspritzdüse eingespannt ist.As long as the valve plate 44 is in its closed position, the Flow channel 24 through the under tension on the conical Sealing surface 26 closed valve ball 50 closed. This prevents that the fuel in the high-pressure chamber 22 is about the switching valve 10 can escape, so that the piston 18 in its lowered Position persists. In this position, the piston 18 holds the nozzle needle in a position in which it closes the injection nozzle, whereby the nozzle needle due to the pressure applied to the injection nozzle of the fuel supplied to the injection valve 14 against the piston 18 is biased, that is hydraulically between the high pressure chamber 22 and the injector is clamped.

Betätigt nun die Einspritzsteuerung des Motors die Magnetspule 38, bewegt sich die ferromagnetische Ventilplatte 44 gegen die Kraft der Druckfeder in ihre Freigabestellung, wodurch die Ventilkugel 50 freigegeben wird. Durch den im Hochdruckraum 22 wirkenden Druck wird die Ventilkugel 50 abgehoben, so daß der Strömungskanal 24 nicht mehr verschlossen ist und der im Hochdruckraum 22 befindliche Kraftstoff durch den Strömungskanal 24 in den Arbeitsraum 42 einströmt, aus dem er über die Öffnung 36 in der Scheibe 34 in eine Leckkraftstoffleitung entweicht. Durch den abfallenden Druck im Hochdruckraum 22 wird die von dem Kolben 18 auf die Düsennadel ausgeübte Kraft so klein, daß die Düsennadel durch den unter hohem Druck stehenden Kraftstoff an der Einspritzdüse angehoben wird und den Kolben 18 in Richtung des Schaltventils 10 bewegt. Gleichzeitig öffnet die Düsennadel die Einspritzdüse, so daß der Kraftstoff in den Zylinder des Motors eintritt.Now actuates the injection control of the engine, the solenoid 38, moves the ferromagnetic valve plate 44 against the force of the compression spring in their release position, whereby the valve ball 50 is released becomes. Due to the pressure acting in the high-pressure chamber 22, the valve ball 50 lifted off so that the flow channel 24 is no longer closed is and the fuel located in the high pressure chamber 22 through the flow channel 24 flows into the working space 42 from which it escapes into a leak fuel line via the opening 36 in the disk 34. Due to the falling pressure in the high pressure chamber 22, the the force exerted on the piston 18 on the nozzle needle is so small that the nozzle needle due to the fuel under high pressure at the injection nozzle is raised and the piston 18 in the direction of the switching valve 10 moves. At the same time, the nozzle needle opens the injection nozzle, see above that the fuel enters the cylinder of the engine.

Sobald die Einspritzsteuerung die Magnetspule 38 deaktiviert, wird die Ventilplatte 44 durch die Kraft der Druckfeder und der federnden Elemente 48 wieder in ihre Schließstellung bewegt, in der sie die Ventilkugel 50 gegen die konische Dichtfläche 26 drückt, die den Strömungskanal 24 erneut verschließt. Die Bewegung der Ventilplatte 44 wird durch den aus dem Spalt zwischen der Ventilplatte 44 und dem Bund 28 des Ventilkörpers 20 zu verdrängenden Kraftstoff gedämpft, der die Schließbewegung der Ventilplatte 44 verlangsamt, wodurch ein Zurückfedern der Ventilplatte 44 nach dem Aufprall auf die Ventilkugel 50 wirksam verhindert wird. As soon as the injection control deactivates the magnet coil 38, the Valve plate 44 by the force of the compression spring and the resilient elements 48 moved back to its closed position, in which the valve ball 50 presses against the conical sealing surface 26, which the flow channel 24th closes again. The movement of the valve plate 44 is characterized by the the gap between the valve plate 44 and the collar 28 of the valve body 20 fuel to be displaced damped the closing movement the valve plate 44 slows down, causing the valve plate to spring back 44 effectively prevented after impacting the valve ball 50 becomes.

Bezugszeichenliste:Reference symbol list:

1010th
SchaltventilSwitching valve
1212th
HaltekörperHolding body
1414
EinspritzventilInjector
1616
DurchgangsbohrungThrough hole
1818th
Kolbenpiston
2020th
VentilkörperValve body
2222
HochdruckraumHigh pressure room
2424th
StrömungskanalFlow channel
2626
konische Dichtflächeconical sealing surface
2828
BundFederation
3030th
DurchgangsöffnungThrough opening
3232
Ringring
3434
Scheibedisc
3636
Öffnungopening
3838
MagnetspuleSolenoid
4040
Gehäusecasing
4242
Arbeitsraumworking space
4444
VentilplatteValve plate
4646
AusnehmungRecess
4848
federnde Elementeresilient elements
5050
VentilkugelValve ball

Claims (14)

Schaltventil, insbesondere zum Betätigen eines Einspritzventiles in einer Verbrennungskraftmaschine, mit einem Ventilkörper (20), in dem ein Strömungskanal (24) ausgebildet ist, der mit einem Ende in einen Arbeitsraum (42) mündet, und mit einer in dem Arbeitsraum (42) aufgenommenen Ventilplatte (44), die zwischen einer Schließstellung und einer Freigabestellung bewegbar ist,
dadurch gekennzeichnet,
daß zwischen der Ventilplatte (44) und der Mündung (26) des Strömungskanales (24) ein Schließelement (50) angeordnet ist, das diese verschließt, wenn sich die Ventilplatte (44) in ihrer Schließstellung befindet.
Switching valve, in particular for actuating an injection valve in an internal combustion engine, with a valve body (20) in which a flow channel (24) is formed, which ends at one end in a working space (42), and with one received in the working space (42) Valve plate (44), which is movable between a closed position and a release position,
characterized by
that between the valve plate (44) and the mouth (26) of the flow channel (24) a closing element (50) is arranged, which closes it when the valve plate (44) is in its closed position.
Schaltventil nach Anspruch 1,
dadurch gekennzeichnet,
daß das Schließelement eine Ventilkugel (50) ist.
Switch valve according to claim 1,
characterized by
that the closing element is a valve ball (50).
Schaltventil nach Anspruch 1 oder 2,
dadurch gekennzeichnet,
daß die Ventilplatte (44) eine Ausnehmung (46) aufweist, die zu der Mündung (26) des Strömungskanales (24) ausgerichtet ist, wobei das Schließelement (50), auch wenn die Ventilplatte (44) in ihre Freigabestellung bewegt ist, in der Ausnehmung (46) und der Mündung (26) gehalten ist.
Switching valve according to claim 1 or 2,
characterized by
that the valve plate (44) has a recess (46) which is aligned with the mouth (26) of the flow channel (24), the closing element (50), even when the valve plate (44) is moved into its release position, in the Recess (46) and the mouth (26) is held.
Schaltventil nach Anspruch 3,
dadurch gekennzeichnet,
daß die Ausnehmung (46) und/oder die Mündung (26) des Strömungskanales (24) konisch erweitert ist bzw. sind.
Switch valve according to claim 3,
characterized by
that the recess (46) and / or the mouth (26) of the flow channel (24) is or are flared.
Schaltventil nach Anspruch 3 oder 4,
dadurch gekennzeichnet,
daß die Tiefe der Ausnehmung (46) größer ist als der Hub der Ventilplatte (44).
Switching valve according to claim 3 or 4,
characterized by
that the depth of the recess (46) is greater than the stroke of the valve plate (44).
Schaltventil nach einem der Ansprüche 1 bis 5,
dadurch gekennzeichnet,
daß an der dem Strömungskanal (24) zugewandten Innenfläche des Arbeitsraumes (42) federnde Elemente (48) vorgesehen sind, die an der Ventilplatte (44) befestigt sind und diese in Richtung des Strömungskanales (24) derart mechanisch vorspannen, daß eine Verlagerung der Ventilplatte (44) quer zu ihrer Bewegungsrichtung verhindert ist.
Switch valve according to one of claims 1 to 5,
characterized by
that resilient elements (48) are provided on the inner surface of the working space (42) facing the flow channel (24), which are fastened to the valve plate (44) and mechanically pretension them in the direction of the flow channel (24) such that a displacement of the valve plate (44) is prevented transversely to their direction of movement.
Schaltventil nach einem der Ansprüche 1 bis 6,
dadurch gekennzeichnet,
daß die Ventilplatte (44) durch eine Druckfeder in ihrer Schließstellung gehalten ist und mit Hilfe eines Aktuators (38) in ihre Freigabestellung bewegbar ist.
Switch valve according to one of claims 1 to 6,
characterized by
that the valve plate (44) is held in its closed position by a compression spring and can be moved into its release position by means of an actuator (38).
Schaltventil nach Anspruch 7,
dadurch gekennzeichnet,
daß als Aktuator ein elektrisch angesteuerter Magnet (38) dient und die Ventilplatte (44) zumindest teilweise aus einem ferromagnetischen Werkstoff gebildet ist.
Switch valve according to claim 7,
characterized by
that an electrically controlled magnet (38) serves as the actuator and the valve plate (44) is at least partially formed from a ferromagnetic material.
Schaltventil nach einem der vorhergehenden Ansprüche,
gekennzeichnet,
durch einen am Ventilkörper (20) ausgebildeten, radial abstehenden Bund (28), der mit einer zur Mündung (26) des Strömungskanals (24) des Ventilkörpers (20) konzentrisch ausgerichteten Durchgangsöffnung (30) versehen ist, durch einen ein Ring (32), der sich mit seiner einen Stirnseite am Bund (28) abstützt und an dessen anderer Stirnseite eine Scheibe (34) anliegt, die gemeinsam mit dem Bund (28) und dem Ring (32) den Arbeitsraum (42) des Schaltventils (10) begrenzt.
Switch valve according to one of the preceding claims,
featured ,
through a radially projecting collar (28) on the valve body (20), which is provided with a through opening (30) concentrically aligned with the mouth (26) of the flow channel (24) of the valve body (20), through a ring (32) , which is supported with its one end face on the collar (28) and on the other end face a disc (34) which, together with the collar (28) and the ring (32), limits the working space (42) of the switching valve (10) .
Schaltventil nach einem der Ansprüche 1 bis 8,
dadurch gekennzeichnet,
daß das Schaltventil (10) eine an dem Ventilkörper (20) anliegende Platte mit einer zur Mündung (26) des Strömungskanals (24) konzentrisch ausgerichteten Durchgangsöffnung, einen an der Platte anliegenden Ring (32) und eine an diesem anliegende Scheibe (34) aufweist, die den Arbeitsraum (42) begrenzen.
Switch valve according to one of claims 1 to 8,
characterized by
that the switching valve (10) has a plate resting on the valve body (20) with a through opening concentrically aligned with the mouth (26) of the flow channel (24), a ring (32) resting on the plate and a disc (34) resting on it that limit the work space (42).
Schaltventil nach Anspruch 8, 9 oder 10,
dadurch gekennzeichnet, daß der Magnet (38) an der der Ventilplatte (44) abgewandten Fläche der Scheibe (34) angeordnet ist, deren Materialstärke den Luftspalt bestimmt, wenn die Ventilplatte (44) in ihre Freigabestellung bewegt ist.
Switching valve according to claim 8, 9 or 10,
characterized in that the magnet (38) is arranged on the surface of the disk (34) facing away from the valve plate (44), the material thickness of which determines the air gap when the valve plate (44) is moved into its release position.
Schaltventil nach Anspruch 9, 10 oder 11,
dadurch gekennzeichnet,
daß der Ventilkörper (20) derart gestaltet ist, daß die Ventilplatte (44) in ihrer Schließstellung an dem aus der Durchgangsöffnung (30) hervorstehenden Schließelement (50) anliegt, das die Mündung (26) des Strömungskanals (24) verschließt, wobei gleichzeitig zwischen der Ventilplatte (44) und dem Ventilkörper (20) ein Spalt bestehen bleibt.
Switching valve according to claim 9, 10 or 11,
characterized by
that the valve body (20) is designed such that the valve plate (44) rests in its closed position on the closing element (50) protruding from the through opening (30), which closes the mouth (26) of the flow channel (24), at the same time between the valve plate (44) and the valve body (20) a gap remains.
Einspritzventil zur Kraftstoffeinspritzung in einer Verbrennungskraftmaschine, insbesondere in einem Dieselmotor, mit einem Haltekörper (12) und einem an diesem befestigten Düsenkörper einer Einspritzdüse, mit einer Düsennadel zum Verschließen der Einspritzdüse, die in einer in dem Haltekörper (12) und dem Düsenkörper ausgebildeten, als Kraftstoffzuführung dienenden Nadelführung (16) bewegbar ist, und mit einem Schaltventil (10) nach einem der vorhergehenden Ansprüche, dessen Strömungskanal (24) mit der Nadelführung (16) in Verbindung steht. Injection valve for fuel injection in an internal combustion engine, especially in a diesel engine, with a holding body (12) and a nozzle body attached to it Injection nozzle, with a nozzle needle for closing the injection nozzle, which in one in the holding body (12) and the nozzle body trained, as a fuel supply needle guide (16) is movable, and with a switching valve (10) according to one of the preceding claims, the flow channel (24) with the Needle guide (16) is connected. Einspritzventil nach Anspruch 13,
dadurch gekennzeichnet,
daß der Ventilkörper (20) des Schaltventils (10) das eine Ende des im Haltekörper (12) ausgebildeten Abschnittes der Nadelführung (16) verschließt und mit der in den Haltekörper (12) ragenden Stirnseite der Düsennadel einen Hochdruckraum (22) begrenzt, der mit dem Strömungskanal (24) in Verbindung steht.
Injection valve according to claim 13,
characterized by
that the valve body (20) of the switching valve (10) closes one end of the section of the needle guide (16) formed in the holding body (12) and, with the end face of the nozzle needle protruding into the holding body (12), delimits a high-pressure chamber (22) with the flow channel (24) is connected.
EP00107266A 1999-04-07 2000-04-03 Control valve Expired - Lifetime EP1043497B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19915686 1999-04-07
DE19915686A DE19915686A1 (en) 1999-04-07 1999-04-07 Switching valve

Publications (3)

Publication Number Publication Date
EP1043497A2 true EP1043497A2 (en) 2000-10-11
EP1043497A3 EP1043497A3 (en) 2003-04-16
EP1043497B1 EP1043497B1 (en) 2004-12-01

Family

ID=7903784

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00107266A Expired - Lifetime EP1043497B1 (en) 1999-04-07 2000-04-03 Control valve

Country Status (4)

Country Link
US (1) US6360972B1 (en)
EP (1) EP1043497B1 (en)
JP (1) JP3667592B2 (en)
DE (2) DE19915686A1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10161002A1 (en) * 2001-12-12 2003-07-03 Bosch Gmbh Robert Solenoid valve for controlling an injection valve of an internal combustion engine
WO2006042488A1 (en) * 2004-10-21 2006-04-27 Robert Bosch Gmbh Fuel injector
WO2008046679A1 (en) * 2006-10-18 2008-04-24 Robert Bosch Gmbh Injector for injecting fuel
WO2017050470A1 (en) * 2015-09-21 2017-03-30 Robert Bosch Gmbh Valve, in particular suction valve, in a high-pressure pump of a fuel injection system

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7051992B2 (en) * 2003-08-25 2006-05-30 Delphi Technologies, Inc. Tubeless actuator with reduced secondary air gap
DE102004015661B4 (en) * 2004-03-31 2007-08-23 Bosch Rexroth Ag Electro-pneumatic valve, in particular pilot valve for a pneumatic directional control valve
DE102007056913A1 (en) * 2007-11-26 2009-05-28 Robert Bosch Gmbh Injector for fuel with ball valve

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2597186B1 (en) * 1986-04-14 1990-01-12 Europ Propulsion VALVE OR VALVE OPERATING WITHOUT FRICTION
IT1240173B (en) * 1990-04-06 1993-11-27 Weber Srl ELECTROMAGNETICALLY OPERATED FUEL INJECTION DEVICE FOR AN INTERNAL COMBUSTION ENGINE
IT220660Z2 (en) * 1990-10-31 1993-10-08 Elasis Sistema Ricerca Fiat IMPROVEMENTS IN THE HIGH PRESSURE SHUTTER SYSTEM IN A PILOT VALVE OF AN ELECTROMAGNETIC INJECTOR FOR FUEL INJECTION SYSTEMS OF INTERNAL COMBUSTION ENGINES
DE4235077A1 (en) * 1992-10-17 1994-04-21 Bosch Gmbh Robert Valve esp. for hydraulic vehicle brake system - has hollow component contg. pair of relatively movable valve elements and at least one connecting opening
US5348233A (en) * 1993-03-01 1994-09-20 General Motors Corporation High volume gaseous fuel injector
DE4428385B4 (en) * 1994-08-11 2005-03-17 Robert Bosch Gmbh valve body
JP3524217B2 (en) * 1995-06-19 2004-05-10 本田技研工業株式会社 solenoid valve
IT1289795B1 (en) * 1996-12-23 1998-10-16 Elasis Sistema Ricerca Fiat IMPROVEMENTS TO AN ELECTROMAGNETICALLY OPERATED DOSING VALVE, WITH BALL SHUTTER, FOR A FUEL INJECTOR.
IT1296144B1 (en) * 1997-11-18 1999-06-09 Elasis Sistema Ricerca Fiat ADJUSTABLE DOSING VALVE FOR ONE FUEL INJECTOR FOR INTERNAL COMBUSTION ENGINES.
DE19832826C2 (en) * 1998-07-21 2000-08-17 Bosch Gmbh Robert Assembly procedure for fuel injector and pilot valve and fuel injector

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10161002A1 (en) * 2001-12-12 2003-07-03 Bosch Gmbh Robert Solenoid valve for controlling an injection valve of an internal combustion engine
WO2006042488A1 (en) * 2004-10-21 2006-04-27 Robert Bosch Gmbh Fuel injector
WO2008046679A1 (en) * 2006-10-18 2008-04-24 Robert Bosch Gmbh Injector for injecting fuel
WO2017050470A1 (en) * 2015-09-21 2017-03-30 Robert Bosch Gmbh Valve, in particular suction valve, in a high-pressure pump of a fuel injection system

Also Published As

Publication number Publication date
DE19915686A1 (en) 2000-10-12
JP3667592B2 (en) 2005-07-06
DE50008794D1 (en) 2005-01-05
EP1043497A3 (en) 2003-04-16
EP1043497B1 (en) 2004-12-01
JP2000310170A (en) 2000-11-07
US6360972B1 (en) 2002-03-26

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