EP1690025B1 - Device, method for producing the device, chamber device and transfer device - Google Patents

Device, method for producing the device, chamber device and transfer device Download PDF

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Publication number
EP1690025B1
EP1690025B1 EP04804690.8A EP04804690A EP1690025B1 EP 1690025 B1 EP1690025 B1 EP 1690025B1 EP 04804690 A EP04804690 A EP 04804690A EP 1690025 B1 EP1690025 B1 EP 1690025B1
Authority
EP
European Patent Office
Prior art keywords
piston
chamber
transmission device
groove
recess
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.)
Not-in-force
Application number
EP04804690.8A
Other languages
German (de)
French (fr)
Other versions
EP1690025A1 (en
Inventor
Hellmut Freudenberg
Willibald SCHÜRZ
Martin Simmet
Hanspeter Zink
Günter Ziegler
Achim LÖLL
Hans Peter Arnold
Patrick Delp
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.)
Carl Freudenberg KG
Continental Automotive GmbH
Original Assignee
Carl Freudenberg KG
Continental Automotive GmbH
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Publication date
Application filed by Carl Freudenberg KG, Continental Automotive GmbH filed Critical Carl Freudenberg KG
Publication of EP1690025A1 publication Critical patent/EP1690025A1/en
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Publication of EP1690025B1 publication Critical patent/EP1690025B1/en
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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
    • F02M61/167—Means for compensating clearance or thermal expansion
    • 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
    • F02M51/0603—Injectors peculiar thereto with means directly operating the valve needle using piezoelectric or magnetostrictive 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
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/16—Sealing of fuel injection apparatus 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
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/70—Linkage between actuator and actuated element, e.g. between piezoelectric actuator and needle valve or pump plunger
    • F02M2200/703—Linkage between actuator and actuated element, e.g. between piezoelectric actuator and needle valve or pump plunger hydraulic
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/70—Linkage between actuator and actuated element, e.g. between piezoelectric actuator and needle valve or pump plunger
    • F02M2200/703—Linkage between actuator and actuated element, e.g. between piezoelectric actuator and needle valve or pump plunger hydraulic
    • F02M2200/704—Linkage between actuator and actuated element, e.g. between piezoelectric actuator and needle valve or pump plunger hydraulic with actuator and actuated element moving in different directions, e.g. in opposite directions
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/90—Selection of particular materials
    • F02M2200/9015—Elastomeric or plastic materials
    • 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
    • F02M45/00—Fuel-injection apparatus characterised by having a cyclic delivery of specific time/pressure or time/quantity relationship
    • F02M45/02—Fuel-injection apparatus characterised by having a cyclic delivery of specific time/pressure or time/quantity relationship with each cyclic delivery being separated into two or more parts

Definitions

  • the invention relates to a device having a first body, which has a recess, and a second body, which is guided into the recess.
  • the invention further relates to a method for manufacturing the device.
  • the invention further relates to a chamber device having a chamber having a chamber housing having a recess with a piston and with the device.
  • the invention further relates to a transmission device which transmits a deflection of an actuator, in particular for an injection valve, with the chamber device.
  • a transmission device may be arranged in an injection valve of an internal combustion engine and preferably transmits the deflection of an actuator to a nozzle needle.
  • Piezo actuators are increasingly being used as actuators because of their very fast response time to control signals to precisely control the metering of fuel and possibly to enable several successive partial injections during a working cycle of a cylinder of the internal combustion engine.
  • the fuel pressure in an injector for diesel engines is up to 2,000 bar. This has the consequence that considerable forces must be applied to open or close the nozzle needle. Furthermore, a trained as a piezo actuator actuator only has a much lower stroke than the required stroke of the nozzle needle. For transmitting the stroke of the actuator, it is known to provide a transmitter device, which optionally amplifies the stroke and / or also creates a temperature-induced length compensation.
  • a fuel injection valve which has a piezoelectric or magnetostrictive actuator. Between the actuator and a valve needle, a transmission device with two mutually movable reciprocating piston is provided. The transmitter device is hermetically sealed against a valve interior.
  • the first reciprocating piston is operatively connected to the actuator and has a hollow cylindrical shape which is open on one side and whose opening is arranged facing away from the actuator. In the cylinder opening of the second piston is guided.
  • the first reciprocating piston is again in a hollow cylindrical housing. Between an end surface of the housing and the first and the second piston, a transmission chamber is formed. Further, a tension spring is provided which biases the first and second pistons in the opposite direction.
  • a compensation chamber is provided, which is partially bounded by a corrugated tube and is hydraulically coupled to the transmission chamber.
  • the compensation chamber serves to compensate for a change in volume of the transmission chamber and to provide the transmission chamber with a transfer medium with a fixed pressure.
  • a corrugated tube is relatively complicated and expensive.
  • a transmission device for transmitting the deflection of a piezoelectric actuator of an injection valve is known.
  • the actuator acts on a first reciprocating piston 1, which is formed in a partial area in the shape of a cylindrical pot and in the pot interior of a second piston engages, which is coupled to a servo valve or a nozzle needle of the injection valve.
  • the first reciprocating piston is guided in a cylinder body.
  • the second piston is guided in the cylinder body.
  • the first and second reciprocating pistons are coupled via a pressure chamber. An axial deflection of the first piston is transmitted by means of the pressure chamber in an opposite axial deflection of the second piston.
  • a compensation chamber which compensates for a change in volume in the transmission chamber and supplies the transmission chamber with a transfer medium with a predetermined pressure.
  • US 4,813,601 describes a transmission device according to the preamble of claim 1.
  • a piezo control valve in particular for controlling the fuel injection via an injection valve is described, which consists of a housing arranged in a piezo actuator and a valve.
  • the object of the invention is to provide a device, a method for manufacturing the device, a chamber device and a transmission device that are simple and that have a long service life.
  • a transmission device for an injection valve which transmits a deflection of an actuator and has a chamber device.
  • the transfer device has a chamber device.
  • the chamber device comprises a chamber having a chamber housing having a recess, a piston and a device.
  • the device has a first body having a recess and a second body guided into the recess and an elastomer interposed between the two first and second body is introduced into the recess and thus closes and seals the gap between the first and second body in this area.
  • the elastomer has a first groove extending at least partially along the recess spaced from the wall of the recess.
  • the invention thus uses the surprising finding that extends through the groove, the durability of the device significantly, even if the elastomer is exposed to high pressure fluctuations, as by the groove, a contact force is generated, which acts from the groove towards the wall of the recess and Thus, the elastomer presses against the recess and thus enhances the sealing effect.
  • the first groove is formed circumferentially, then a particularly uniform tightness along the entire recess is easily ensured.
  • the sealing effect towards the second body can be significantly improved in particular.
  • the second groove is spaced 0.2 to 1.5 mm apart from the second elastomeric body. This results in a particularly good sealing effect between the elastomer and the second body.
  • the first groove is deeper than the second groove.
  • the sealing effect can be significantly improved, which is based on the knowledge that sealing problems occur to a greater extent on the wall of the recess. It is particularly advantageous if the second groove is so wide that it opens into the first groove. This has the advantage that the device can be made very easily since the tool for making the contour of the elastomer can be easily removed from the mold.
  • the areas of the first and second body where the elastomer comes to rest are free of edges. Possible cross-sectional changes are rounded. This has the advantage that a primer applied to the first body and the second body to ensure a good bond between the elastomer and the first and second bodies, respectively, are simply applied with uniform thickness to the first and second bodies can.
  • first and second bodies are tubular. They are then suitable for insertion into further bodies and can then be permanently connected to them, for example by means of a welded connection.
  • simply the device can be manufactured separately and used for example for a chamber device.
  • the chamber housing is the first body and / or the piston is the second body.
  • Another chamber device is characterized by a chamber having a chamber housing having a recess with a piston and the device, wherein the first and second body are tubular and the chamber housing with the first body and the piston with the second body are connected.
  • This compound is particularly advantageously produced by welding.
  • the transmission device has a housing which has a first recess in which a first and a second piston are movably mounted.
  • the first and the second piston are operatively connected via at least one transmission chamber via a fluid, wherein the operative connection causes a displacement of the second piston when the first piston is moved and vice versa, wherein the transmission chamber via a Sealing gap is hydraulically connected to a compensation chamber, the pressure differences between the transfer chamber and the compensation chamber delayed compensated.
  • the chamber of the chamber device, the compensation chamber, the chamber housing the housing and the piston are the first piston.
  • the first body and the second body are plasma activated, then the first body and the second body are provided with an adhesion promoter in the areas where the elastomer is to abut, and then the elastomer is introduced and vulcanized.
  • the plasma activation which is preferably carried out by means of an ionized gas, for example oxygen, are generated at the areas of the first and second body, where the elastomer is to rest, radicals that are very easy to bond and thus to a very good bond of the adhesion promoter the areas of the first and second body lead.
  • an ionized gas for example oxygen
  • An injection valve 1 has an actuator 2, which is connected via a transmission device 3 with a nozzle needle 4 in operative connection.
  • the actuator 2 is preferred as a piezoelectric actuator educated. However, it may be another actuator producing a stroke.
  • the transmission device 3 preferably translates the deflection of the actuator 2 in the direction of the nozzle needle such that a deflection of the actuator 2 in the direction of the nozzle needle 4 is transmitted to an enlarged deflection of the nozzle needle 4. Furthermore, it preferably also compensates for temperature-induced changes in length of the actuator.
  • the nozzle needle 4 closes or releases depending on their position, a nozzle 41 in the injection valve 1 and thus controls the metering of fuel.
  • the transmitter device 3 can also transmit a deflection of the actuator 2 in the direction of the nozzle needle 4 in the opposite direction to the nozzle needle 4.
  • the transmission device 3 has a first piston 6, which has a ring-cylindrical shape open on one side.
  • the ring-cylindrical part of the first piston 6 defines a first transmission chamber 10 into which a second piston 7 is guided.
  • the first piston 6 is inserted into a cup-shaped recess 8 of the housing 5 and guided there.
  • the second piston 7 is guided in a further recess 16 of the housing 5 and projects into a recess 9 of the first piston 6.
  • the second piston 7 has an annular shoulder, on which its diameter increases in an abrupt manner toward the region which is guided in the first piston 6.
  • the shoulder forms an annular rear surface 13 of the second piston 7.
  • a first end surface 17 of the first piston, the rear surface 13 of the second piston and the end surface 15 of the housing 5 define a second transmission chamber 11.
  • the second transmission chamber 11 is hydraulically connected to the first transmission chamber 10 via a first sealing gap 18, which is formed between a side wall of the second piston 7 and an inner wall of the first piston 6.
  • the first transmission chamber 10 is from a second end face 19th of the first piston 6 and an end face 20 of the second piston 7 is limited.
  • the first sealing gap 18 is designed so narrow that short-term pressure fluctuations between the transformer chambers 10, 11 are not compensated. Furthermore, the second transmission chamber 11 is connected to a compensation chamber 22 via a second sealing gap 21, which is formed between the outer wall of the first piston and the inner wall of the housing.
  • the first transmission chamber 10 is hydraulically coupled via a bore 60, which is introduced into the first piston 6, with the compensation chamber 22.
  • the compensation chamber 22 is bounded by a rear surface 14 of the first piston and by a device which is described in detail with reference to FIG FIG. 4 is described.
  • the device comprises in the embodiment of the transmitter device according to FIG. 2 a first sleeve 52 and a second sleeve 53 having a smaller diameter than the first sleeve 52. Between the first and second sleeve 52, 53 an elastomer 50 is introduced.
  • the first sleeve 52 is fixedly connected to the housing 4, preferably by welding.
  • the second sleeve 53 is fixedly connected to the first piston 6, preferably also by welding.
  • the elastomer 50 is introduced into the space between the first piston 6 and the end portion of the housing 5.
  • the embodiment according to FIG. 2 offers the advantage that the first and second sleeves 52, 53 and the elastomer can be prepared in advance.
  • the elastomer 50 is intended to allow an increase in the volume of the compensation chamber 22 by its elastic properties and thus avoid excessive pressure increases.
  • the first and second transfer chambers 10, 11 and the compensation chamber 22 are filled with a fluid, preferably oil.
  • the housing 5, the first piston 6 and the second piston 7 and also the first and second sleeves 52, 53 are preferably made of steel.
  • a tensioning means 54 which is preferably designed as a spiral spring, provided that on the one hand supported on a stop ring 55 and on the other hand acts on the elastomer 50.
  • the tensioning means is biased to bias the elastomer 50 toward the balance chamber 22 with a predetermined force.
  • the device is provided with a first body formed as a first sleeve 52 with a second body formed as a second sleeve 53 and the elastomer 50.
  • the first body is in accordance with the embodiment of the transmitter device 3 FIG. 3 the housing 5 and the second body is the first piston 6.
  • the elastomer 50 is introduced into the intermediate region between the first sleeve 52 and the second sleeve 53 in such a way that it closes and seals it.
  • a first groove 61 is formed, which extends at a distance from the wall of the recess along the recess. It is, as in the top view in FIG. 5 represented, circumferentially within the recess of the first sleeve 52, ie the area enclosed by the sleeve 52 in the interior. It is preferably spaced from the wall of the first sleeve with a distance of 0.2 to 1.5 mm relative to the groove center. The depth of the first groove is preferably selected between 0.2 and 1.5 mm.
  • a second groove 62 is provided, the up-running edge preferably between 0.2 and 1.5 mm to the second sleeve 53 is spaced. It is ensured by the second groove 62 that the pressure prevailing in the compensation chamber 22 also acts radially on the second sleeve 53 and thus presses the elastomer 50 against the second sleeve 53. As a result, the sealing effect with respect to the second sleeve 53 is also significantly improved.
  • the second groove 62 is formed less deep than the first groove 61. This is based on the knowledge that even a less deep second groove is sufficient to ensure sufficient tightness of the elastomer 50 to the second sleeve 53 in contrast to the first sleeve 52. In addition, the smallest possible depth of the grooves 61, 62 desirable in terms of minimizing the volume of the compensation chamber 22. The fact that the second groove 62 opens directly into the first groove 61, a simpler demolding of the tool is possible with the the elastomer is brought into its shape, which makes the device much easier to manufacture, especially with regard to very small dimensions.
  • the first body formed as a first sleeve 52 and the second body formed as a second sleeve 53 is plasma-activated. This is preferably done by rinsing with ionized gas, eg oxygen, whereby radical sites are formed on the metal surface, which result in a very strong bondability of the surface of the first and second sleeves 52, 53.
  • ionized gas eg oxygen
  • a bonding agent is applied to the first and second sleeve, preferably in the region in which the elastomer 50 is intended to abut.
  • the effect of the primer is better the thinner the layer provided with the primer. Ideally, this is a monomolecular layer.
  • the rounded edges of the first and second sleeves 52, 53 ensure that the bonding agent is easy can distribute evenly. Experiments have shown that too sharp edges can lead to an uneven distribution of the adhesion promoter and thus to local changes in layer thickness, with the result that in the thicker regions of the adhesion promoter, the elastomer does not adhere so well to the first and second sleeves 52, 53 and thus leaks can occur.
  • first and second sleeves 52, 53 are inserted into a corresponding molding tool and then the elastomer composition is injected and permanently brought into its shape by means of a vulcanization process.
  • the tubular body of the first body is formed here in a rectangular basic shape.
  • the first and second bodies can also be formed in further tube shapes, such as an elliptical basic shape.
  • the first groove 61 is not circumferentially formed in this embodiment, but only in sections, preferably in areas where an additional radial contact pressure of the elastomer 50 is necessary to ensure the desired sealing effect and durability of the device.
  • the first groove 61 is formed so wide in the radial direction that sufficient forces are exerted on this wall via its facing to the first sleeve 52 wall forces to ensure the tightness with respect to the first sleeve 52 and at the same time over the wall, which faces the second sleeve 53, sufficient contact forces are transmitted, which ensure a sufficient tightness with respect to the second sleeve 53.
  • the device according to FIG. 4 . 5, 6 and 7 can be used except for a transmitter device 3 for any other chamber device.

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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)
  • Actuator (AREA)
  • Sealing Devices (AREA)
  • Gasket Seals (AREA)

Description

Die Erfindung betrifft eine Vorrichtung mit einem ersten Körper, der eine Ausnehmung hat, und einen zweiten Körper, der in die Ausnehmung hineingeführt ist. Die Erfindung betrifft ferner ein Verfahren zum Herstellen der Vorrichtung. Die Erfindung betrifft ferner eine Kammervorrichtung mit einer Kammer, die ein Kammergehäuse hat, das eine Ausnehmung hat, mit einem Kolben und mit der Vorrichtung. Die Erfindung betrifft ferner eine Übertragervorrichtung, die eine Auslenkung eines Aktors überträgt, insbesondere für ein Einspritzventil, mit der Kammervorrichtung.The invention relates to a device having a first body, which has a recess, and a second body, which is guided into the recess. The invention further relates to a method for manufacturing the device. The invention further relates to a chamber device having a chamber having a chamber housing having a recess with a piston and with the device. The invention further relates to a transmission device which transmits a deflection of an actuator, in particular for an injection valve, with the chamber device.

Eine Übertragervorrichtung kann in einem Einspritzventil einer Brennkraftmaschine angeordnet sein und überträgt die Auslenkung eines Aktors vorzugsweise auf eine Düsennadel. Als Aktoren kommen hierfür immer häufiger Piezoaktoren zum Einsatz, die aufgrund ihrer sehr schnellen Ansprechzeitdauer auf Ansteuersignale sehr gut geeignet sind, um die Zumessung von Kraftstoff präzise zu steuern und gegebenenfalls während eines Arbeitszyklusses eines Zylinders der Brennkraftmaschine mehrere aufeinanderfolgende Teileinspritzungen zu ermöglichen.A transmission device may be arranged in an injection valve of an internal combustion engine and preferably transmits the deflection of an actuator to a nozzle needle. Piezo actuators are increasingly being used as actuators because of their very fast response time to control signals to precisely control the metering of fuel and possibly to enable several successive partial injections during a working cycle of a cylinder of the internal combustion engine.

Der Kraftstoffdruck in einem Einspritzventil für DieselBrennkraftmaschinen beträgt bis zu 2.000 bar. Dies hat zur Folge, dass zum Öffnen oder Schließen der Düsennadel erhebliche Kräfte aufgebracht werden müssen. Ferner hat ein als Piezoaktor ausgebildeter Aktor nur einen deutlich geringeren Hub als der erforderliche Hub der Düsennadel. Zum Übertragen des Hubs des Aktors ist es bekannt, eine Übertragervorrichtung vorzusehen, die gegebenenfalls den Hub verstärkt und/oder auch einen temperaturbedingten Längenausgleich schafft.The fuel pressure in an injector for diesel engines is up to 2,000 bar. This has the consequence that considerable forces must be applied to open or close the nozzle needle. Furthermore, a trained as a piezo actuator actuator only has a much lower stroke than the required stroke of the nozzle needle. For transmitting the stroke of the actuator, it is known to provide a transmitter device, which optionally amplifies the stroke and / or also creates a temperature-induced length compensation.

Aus der DE 199 50 760 ist ein Brennstoffeinspritzventil bekannt, das einen piezoelektrischen oder magnetostriktiven Aktor aufweist. Zwischen dem Aktor und einer Ventilnadel ist eine Übertragervorrichtung mit zwei gegeneinander beweglichen Hubkolben vorgesehen. Die Übertragervorrichtung ist hermetisch gegenüber einem Ventilinnenraum abgeschlossen. Der erste Hubkolben steht mit dem Aktor in Wirkverbindung und weist eine einseitig offene Hohlzylinderform auf, deren Öffnung vom Aktor abgewandt angeordnet ist. In der Zylinderöffnung ist der zweite Hubkolben geführt. Der erste Hubkolben befindet sich wiederum in einem hohlzylindrischen Gehäuse. Zwischen einer Endfläche des Gehäuses und dem ersten und dem zweiten Kolben ist eine Übertragerkammer ausgebildet. Ferner ist eine Spannfeder vorgesehen, die den ersten und zweiten Kolben in entgegengesetzter Richtung vorspannt. Ferner ist eine Ausgleichskammer vorgesehen, welche teilweise durch ein Wellrohr begrenzt wird und hydraulisch gekoppelt ist mit der Übertragerkammer. Die Ausgleichskammer dient dazu, eine Volumenänderung der Übertragerkammer auszugleichen und die Übertragerkammer mit einem Übertragermedium mit festgelegtem Druck zu versorgen. Ein derartiges Wellrohr ist jedoch relativ aufwändig und teuer.From the DE 199 50 760 For example, a fuel injection valve is known which has a piezoelectric or magnetostrictive actuator. Between the actuator and a valve needle, a transmission device with two mutually movable reciprocating piston is provided. The transmitter device is hermetically sealed against a valve interior. The first reciprocating piston is operatively connected to the actuator and has a hollow cylindrical shape which is open on one side and whose opening is arranged facing away from the actuator. In the cylinder opening of the second piston is guided. The first reciprocating piston is again in a hollow cylindrical housing. Between an end surface of the housing and the first and the second piston, a transmission chamber is formed. Further, a tension spring is provided which biases the first and second pistons in the opposite direction. Furthermore, a compensation chamber is provided, which is partially bounded by a corrugated tube and is hydraulically coupled to the transmission chamber. The compensation chamber serves to compensate for a change in volume of the transmission chamber and to provide the transmission chamber with a transfer medium with a fixed pressure. However, such a corrugated tube is relatively complicated and expensive.

Auch aus der DE 101 62 045 A1 ist eine Übertragervorrichtung zum Übertragen der Auslenkung eines piezoelektrischen Aktors eines Einspritzventils bekannt. Der Aktor wirkt auf einen ersten Hubkolben 1 ein, der in einem Teilbereich zylindertopfförmig ausgebildet ist und in dessen Topfinneres ein zweiter Kolben eingreift, der mit einem Servoventil oder einer Düsennadel des Einspritzventils gekoppelt ist. Der erste Hubkolben ist in einem Zylinderkörper geführt. Ebenso ist der zweite Hubkolben in dem Zylinderkörper geführt. Der erste und der zweite Hubkolben sind über eine Druckkammer gekoppelt. Eine axiale Auslenkung des ersten Hubkolbens wird mittels der Druckkammer in eine entgegengesetzte axiale Auslenkung des zweiten Hubkolbens übertragen. Ferner ist eine Ausgleichskammer vorgesehen, die eine Volumenänderung in der Übertragerkammer ausgleicht und die Übertragerkammer mit einem Übertragermedium mit einem festgelegten Druck versorgt. US 4,813,601 beschreibt eine Übertragungsvorrichtung gemäß dem Oberbegriff des Anspruchs 1. In der US 4,813,601 wird ein Piezosteuerventil, insbesondere zur Steuerung der Kraftstoffeinspritzung über ein Einspritzventil beschrieben, welches aus einem in einem Gehäuse angeordneten Piezostellglied und einem Ventil besteht. Durch ein hydraulisches Spielausgleichselement innerhalb des Steuerventils einerseits werden als Folge von piezokeramischen Setzvorgängen im Piezostellglied mögliche Längenänderungen des Bezugssystems automatisch ausgeglichen, so dass bei gleichem Arbeitshub des Piezostellgliedes auch stets ein gleicher Hub am Ventil gewährleistet ist und wobei ferner durch eine hydraulische Hubübersetzung innerhalb des Steuerventils andererseits ein einem Vielfachen des Arbeitshubes entsprechender Ventilhub erzielt wird.Also from the DE 101 62 045 A1 For example, a transmission device for transmitting the deflection of a piezoelectric actuator of an injection valve is known. The actuator acts on a first reciprocating piston 1, which is formed in a partial area in the shape of a cylindrical pot and in the pot interior of a second piston engages, which is coupled to a servo valve or a nozzle needle of the injection valve. The first reciprocating piston is guided in a cylinder body. Likewise, the second piston is guided in the cylinder body. The first and second reciprocating pistons are coupled via a pressure chamber. An axial deflection of the first piston is transmitted by means of the pressure chamber in an opposite axial deflection of the second piston. Furthermore, a compensation chamber is provided, which compensates for a change in volume in the transmission chamber and supplies the transmission chamber with a transfer medium with a predetermined pressure. US 4,813,601 describes a transmission device according to the preamble of claim 1. In the US 4,813,601 a piezo control valve, in particular for controlling the fuel injection via an injection valve is described, which consists of a housing arranged in a piezo actuator and a valve. By a hydraulic lash adjuster within the control valve on the one hand possible changes in length of the reference frame are automatically compensated as a result of piezoceramic setting operations in the piezo actuator, so that the same stroke of the piezo actuator is always guaranteed a same stroke on the valve and where further by a hydraulic Hubübersetzung within the control valve on the other a valve lift corresponding to a multiple of the working stroke is achieved.

Die Aufgabe der Erfindung ist es, eine Vorrichtung, ein Verfahren zum Herstellen der Vorrichtung, eine Kammervorrichtung und eine Übertragervorrichtung zu schaffen, die einfach sind und die eine lange Lebensdauer haben.The object of the invention is to provide a device, a method for manufacturing the device, a chamber device and a transmission device that are simple and that have a long service life.

Die Aufgabe wird gelöst durch die Merkmale des unabhängigen Patentanspruchs. Vorteilhafte Ausgestaltungen der Erfindung sind in den Unteransprüchen gekennzeichnet.The object is solved by the features of the independent claim. Advantageous embodiments of the invention are characterized in the subclaims.

Gemäß der Erfindung wird eine Übertragungsvorrichtung für ein Einspritzventil angegeben, die eine Auslenkung eines Aktors überträgt und eine Kammervorrichtung aufweist.According to the invention, a transmission device for an injection valve is specified, which transmits a deflection of an actuator and has a chamber device.

Die Übertragungsvorrichtung hat eine Kammervorrichtung. Die Kammervorrichtung weist eine Kammer, die ein Kammergehäuse hat, das eine Ausnehmung hat, einen Kolben und eine Vorrichtung auf. Die Vorrichtung hat einen ersten Körper, der eine Ausnehmung hat, und einen zweiten Körper, der in die Ausnehmung hineingeführt ist, und ein Elastomer, das zwischen den ersten und zweiten Körper in die Ausnehmung eingebracht ist und so in diesen Bereich den Zwischenraum zwischen dem ersten und zweiten Körper verschließt und abdichtet. Das Elastomer hat eine erste Nut, die sich beabstandet zu der Wandung der Ausnehmung zumindest teilweise entlang der Ausnehmung erstreckt. Die Erfindung nutzt so die überraschende Erkenntnis, dass sich durch die Nut die Dauerhaltbarkeit der Vorrichtung deutlich verlängert, selbst wenn das Elastomer hohen Druckschwankungen ausgesetzt ist, da durch die Nut eine Anpresskraft erzeugt wird, die von der Nut hin zu der Wandung der Ausnehmung wirkt und somit das Elastomer gegen die Ausnehmung drückt und somit die Dichtwirkung verstärkt.The transfer device has a chamber device. The chamber device comprises a chamber having a chamber housing having a recess, a piston and a device. The device has a first body having a recess and a second body guided into the recess and an elastomer interposed between the two first and second body is introduced into the recess and thus closes and seals the gap between the first and second body in this area. The elastomer has a first groove extending at least partially along the recess spaced from the wall of the recess. The invention thus uses the surprising finding that extends through the groove, the durability of the device significantly, even if the elastomer is exposed to high pressure fluctuations, as by the groove, a contact force is generated, which acts from the groove towards the wall of the recess and Thus, the elastomer presses against the recess and thus enhances the sealing effect.

Wenn die erste Nut umlaufend ausgebildet ist, dann ist eine besonders gleichmäßige Dichtheit entlang der gesamten Ausnehmung einfach gewährleistet.If the first groove is formed circumferentially, then a particularly uniform tightness along the entire recess is easily ensured.

Besonders vorteilhaft ist es, wenn die erste Nut in einem Abstand von 0,2 bis 1,5 mm zu der Wandung der Ausnehmung geführt ist. Dann ist der Dichteffekt besonders gut ausgeprägt.It when the first groove is guided at a distance of 0.2 to 1.5 mm to the wall of the recess is particularly advantageous. Then the sealing effect is particularly good.

Es ist eine zweite Nut vorgesehen, die radial innerhalb der ersten Nut verläuft. Dadurch kann dann auch speziell die Dichtwirkung hin zu dem zweiten Körper deutlich verbessert werden. Vorteilhaft ist die zweite Nut zu der Anlage des Elastomers an den zweiten Körper 0,2 bis 1,5 mm beabstandet. Dadurch ergibt sich eine besonders gute Dichtwirkung zwischen dem Elastomer und dem zweiten Körper.There is provided a second groove extending radially within the first groove. As a result, the sealing effect towards the second body can be significantly improved in particular. Advantageously, the second groove is spaced 0.2 to 1.5 mm apart from the second elastomeric body. This results in a particularly good sealing effect between the elastomer and the second body.

Die erste Nut ist tiefer als die zweite Nut. Dadurch kann insgesamt die Dichtwirkung deutlich verbessert werden, was auf der Erkenntnis beruht, dass Dichtprobleme in verstärktem Maße an der Wandung der Ausnehmung auftreten. Besonders vorteilhaft ist es hierbei, wenn die zweite Nut so breit ist, dass sie in die erste Nut einmündet. Dies hat den Vorteil, dass die Vorrichtung sehr einfach hergestellt werden kann, da das Werkzeug zum Herstellen der Kontur des Elastomers sehr leicht entformt werden kann.The first groove is deeper than the second groove. As a result, overall, the sealing effect can be significantly improved, which is based on the knowledge that sealing problems occur to a greater extent on the wall of the recess. It is particularly advantageous if the second groove is so wide that it opens into the first groove. This has the advantage that the device can be made very easily since the tool for making the contour of the elastomer can be easily removed from the mold.

Die Bereiche des ersten und zweiten Körpers, an denen das Elastomer zur Anlage kommt, sind frei von Kanten. Mögliche Querschnittsveränderungen sind verrundet. Dies hat den Vorteil, dass ein Haftvermittler, der auf den ersten Körper und den zweiten Körper aufgebracht wird, um eine gute Verbindung zwischen dem Elastomer und dem ersten bzw. dem zweiten Körper sicherzustellen, einfach mit gleichmäßiger Dicke auf dem ersten und zweiten Körper aufgetragen werden kann.The areas of the first and second body where the elastomer comes to rest are free of edges. Possible cross-sectional changes are rounded. This has the advantage that a primer applied to the first body and the second body to ensure a good bond between the elastomer and the first and second bodies, respectively, are simply applied with uniform thickness to the first and second bodies can.

Ferner ist es vorteilhaft, wenn der erste und zweite Körper rohrförmig sind. Sie sind dann geeignet zum Einsetzen in weitere Körper und können mit ihnen dann beispielsweise mittels einer Schweißverbindung dauerhaft verbunden werden. So kann einfach die Vorrichtung separat hergestellt werden und beispielsweise für eine Kammervorrichtung eingesetzt werden.Furthermore, it is advantageous if the first and second bodies are tubular. They are then suitable for insertion into further bodies and can then be permanently connected to them, for example by means of a welded connection. Thus, simply the device can be manufactured separately and used for example for a chamber device.

Bei einer Kammervorrichtung ist das Kammergehäuse der erste Körper und/oder der Kolben der zweite Körper.In a chamber device, the chamber housing is the first body and / or the piston is the second body.

Eine weitere Kammervorrichtung zeichnet sich aus durch eine Kammer, die ein Kammergehäuse hat, das eine Ausnehmung hat, mit einem Kolben und der Vorrichtung, wobei der erste und zweite Körper rohrförmig ausgebildet sind und das Kammergehäuse mit dem ersten Körper und der Kolben mit dem zweiten Körper verbunden sind. Diese Verbindung wird besonders vorteilhaft mittels Schweißen hergestellt.Another chamber device is characterized by a chamber having a chamber housing having a recess with a piston and the device, wherein the first and second body are tubular and the chamber housing with the first body and the piston with the second body are connected. This compound is particularly advantageously produced by welding.

Die Übertragervorrichtung hat ein Gehäuse, das eine erste Ausnehmung aufweist, in der ein erster und ein zweiter Kolben beweglich gelagert sind. Der erste und der zweite Kolben stehen über mindestens eine Übertragerkammer über ein Fluid in Wirkverbindung, wobei die Wirkverbindung ein Verschieben des zweiten Kolbens bewirkt, wenn der erste Kolben bewegt wird und umgekehrt, wobei die Übertragerkammer über einen Dichtspalt mit einer Ausgleichskammer hydraulisch verbunden ist, der Druckunterschiede zwischen der Übertragerkammer und der Ausgleichskammer verzögert ausgleicht. Die Kammer der Kammervorrichtung die Ausgleichskammer, das Kammergehäuse das Gehäuse und der Kolben der erste Kolben sind. Dies hat den Vorteil, dass das Elastomer kostengünstig herstellbar ist und so die Ausgleichskammer insgesamt kostengünstig herstellbar ist.The transmission device has a housing which has a first recess in which a first and a second piston are movably mounted. The first and the second piston are operatively connected via at least one transmission chamber via a fluid, wherein the operative connection causes a displacement of the second piston when the first piston is moved and vice versa, wherein the transmission chamber via a Sealing gap is hydraulically connected to a compensation chamber, the pressure differences between the transfer chamber and the compensation chamber delayed compensated. The chamber of the chamber device, the compensation chamber, the chamber housing the housing and the piston are the first piston. This has the advantage that the elastomer can be produced inexpensively and thus the compensation chamber is overall inexpensive to produce.

Bei einem Verfahren zum Herstellen der Vorrichtung werden der erste Körper und der zweite Körper plasmaaktiviert, dann der erste Körper und der zweite Körper in den Bereichen, an denen das Elastomer anliegen soll, mit einem Haftvermittler versehen und anschließend das Elastomer eingebracht und vulkanisiert. Durch das Plasmaaktivieren, das vorzugsweise mittels eines ionisierten Gases, z.B. Sauerstoff, erfolgt, werden an den Bereichen des ersten und zweiten Körpers, an denen das Elastomer anliegen soll, Radikale erzeugt, die sehr bindungsfreudig sind und so zu einer sehr guten Bindung des Haftvermittlers an die Bereiche des ersten und zweiten Körpers führen. Dadurch wird auf einfache Weise eine sehr gute Verbindung zwischen dem ersten bzw. zweiten Körper und dem Elastomer ermöglicht. Besonders gut ist die Verbindung, wenn der Haftvermittler sehr gleichmäßig auf den ersten und zweiten Körper aufgetragen wird, was einfach da
durch unterstützt werden kann, wenn die Bereiche des ersten und zweiten Körpers, an denen das Elastomer zur Anlage kommt, frei sind von Kanten.In a method of manufacturing the device, the first body and the second body are plasma activated, then the first body and the second body are provided with an adhesion promoter in the areas where the elastomer is to abut, and then the elastomer is introduced and vulcanized. By the plasma activation, which is preferably carried out by means of an ionized gas, for example oxygen, are generated at the areas of the first and second body, where the elastomer is to rest, radicals that are very easy to bond and thus to a very good bond of the adhesion promoter the areas of the first and second body lead. As a result, a very good connection between the first and second body and the elastomer is made possible in a simple manner. The compound is particularly good if the bonding agent is applied very evenly to the first and second body, which is simply there
can be supported by, if the areas of the first and second body, where the elastomer comes to rest, are free of edges.

Ausführungsbeispiele der Erfindung sind im folgenden anhand der schematischen Zeichnungen erläutert. Es zeigen:

Figur 1
ein Einspritzventil,
Figur 2
eine erste Ausführungsform einer Übertragungsvorrichtung,
Figur 3
eine zweite Ausführungsform der Übertragungsvorrichtung,
Figur 4
eine Vorrichtung,
Figur 5
eine Draufsicht auf die Vorrichtung gemäß Figur 4,
Figur 6
eine Draufsicht auf eine weitere Ausführungsform der Vorrichtung und
Figur 7
eine Draufsicht auf eine weitere Ausführungsform der Vorrichtung.
Embodiments of the invention are explained below with reference to the schematic drawings. Show it:
FIG. 1
an injection valve,
FIG. 2
A first embodiment of a transmission device
FIG. 3
a second embodiment of the transmission device,
FIG. 4
a device
FIG. 5
a plan view of the device according to FIG. 4 .
FIG. 6
a plan view of a further embodiment of the device and
FIG. 7
a plan view of a further embodiment of the device.

Elemente gleicher Konstruktion und Funktion sind figurenübergreifend mit den gleichen Bezugszeichen gekennzeichnet.Elements of the same construction and function are identified across the figures with the same reference numerals.

Ein Einspritzventil 1 hat einen Aktor 2, der über eine Übertragervorrichtung 3 mit einer Düsennadel 4 in Wirkverbindung steht. Der Aktor 2 ist bevorzugt als piezoelektrischer Aktor ausgebildet. Er kann jedoch ein anderer einen Hub erzeugender Aktor sein. Die Übertragervorrichtung 3 übersetzt vorzugsweise die Auslenkung des Aktors 2 in Richtung der Düsennadel derart, dass eine Auslenkung des Aktors 2 in Richtung der Düsennadel 4 in eine vergrößerte Auslenkung der Düsennadel 4 übertragen wird. Ferner gleicht sie bevorzugt auch temperaturbedingte Längenänderungen des Aktors aus. Die Düsennadel 4 verschließt oder gibt frei je nach ihrer Stellung eine Düse 41 in dem Einspritzventil 1 und steuert so die Zumessung von Kraftstoff.An injection valve 1 has an actuator 2, which is connected via a transmission device 3 with a nozzle needle 4 in operative connection. The actuator 2 is preferred as a piezoelectric actuator educated. However, it may be another actuator producing a stroke. The transmission device 3 preferably translates the deflection of the actuator 2 in the direction of the nozzle needle such that a deflection of the actuator 2 in the direction of the nozzle needle 4 is transmitted to an enlarged deflection of the nozzle needle 4. Furthermore, it preferably also compensates for temperature-induced changes in length of the actuator. The nozzle needle 4 closes or releases depending on their position, a nozzle 41 in the injection valve 1 and thus controls the metering of fuel.

Je nach Ausführungsform kann die Übertragervorrichtung 3 auch eine Auslenkung des Aktors 2 in Richtung der Düsennadel 4 in entgegengesetzter Richtung auf die Düsennadel 4 übertragen.Depending on the embodiment, the transmitter device 3 can also transmit a deflection of the actuator 2 in the direction of the nozzle needle 4 in the opposite direction to the nozzle needle 4.

Die Übertragervorrichtung 3 hat einen ersten Kolben 6, der eine einseitig offene Ring-Zylinderform aufweist. Der ringzylinderförmige Teil des ersten Kolbens 6 begrenzt eine erste Übertragerkammer 10, in die ein zweiter Kolben 7 geführt ist. Der erste Kolben 6 ist in eine topfförmige Ausnehmung 8 des Gehäuses 5 eingebracht und dort geführt. Der zweite Kolben 7 ist in einer weiteren Ausnehmung 16 des Gehäuses 5 geführt und ragt in eine Ausnehmung 9 des ersten Kolbens 6 hinein.The transmission device 3 has a first piston 6, which has a ring-cylindrical shape open on one side. The ring-cylindrical part of the first piston 6 defines a first transmission chamber 10 into which a second piston 7 is guided. The first piston 6 is inserted into a cup-shaped recess 8 of the housing 5 and guided there. The second piston 7 is guided in a further recess 16 of the housing 5 and projects into a recess 9 of the first piston 6.

Der zweite Kolben 7 hat einen ringförmigen Absatz, an dem sich sein Durchmesser sprungartig vergrößert hin zu dem Bereich, der in dem ersten Kolben 6 geführt ist. Der Absatz bildet eine ringförmige Rückfläche 13 des zweiten Kolbens 7. Eine erste Stirnfläche 17 des ersten Kolbens, die Rückfläche 13 des zweiten Kolbens und die Endfläche 15 des Gehäuses 5 begrenzen eine zweite Übertragerkammer 11.The second piston 7 has an annular shoulder, on which its diameter increases in an abrupt manner toward the region which is guided in the first piston 6. The shoulder forms an annular rear surface 13 of the second piston 7. A first end surface 17 of the first piston, the rear surface 13 of the second piston and the end surface 15 of the housing 5 define a second transmission chamber 11.

Die zweite Übertragerkammer 11 ist über einen ersten Dichtspalt 18, der zwischen einer Seitenwand des zweiten Kolbens 7 und einer Innenwand des ersten Kolbens 6 ausgebildet ist, mit der ersten Übertragerkammer 10 hydraulisch verbunden. Die erste Übertragerkammer 10 wird von einer zweiten Stirnfläche 19 des ersten Kolbens 6 und einer Stirnfläche 20 des zweiten Kolbens 7 begrenzt.The second transmission chamber 11 is hydraulically connected to the first transmission chamber 10 via a first sealing gap 18, which is formed between a side wall of the second piston 7 and an inner wall of the first piston 6. The first transmission chamber 10 is from a second end face 19th of the first piston 6 and an end face 20 of the second piston 7 is limited.

Der erste Dichtspalt 18 ist so eng ausgelegt, dass kurzzeitige Druckschwankungen zwischen den Übertragerkammern 10, 11 nicht ausgeglichen werden. Weiterhin ist die zweite Übertragerkammer 11 über einen zweiten Dichtspalt 21, der zwischen der Außenwand des ersten Kolbens und der Innenwand des Gehäuses ausgebildet ist, mit einer Ausgleichskammer 22 verbunden. Die erste Übertragerkammer 10 ist über eine Bohrung 60, die in den ersten Kolben 6 eingebracht ist, mit der Ausgleichskammer 22 hydraulisch gekoppelt. Die Ausgleichskammer 22 wird begrenzt durch eine Rückfläche 14 des ersten Kolbens und durch eine Vorrichtung, die detailliert anhand der Figur 4 beschrieben ist.The first sealing gap 18 is designed so narrow that short-term pressure fluctuations between the transformer chambers 10, 11 are not compensated. Furthermore, the second transmission chamber 11 is connected to a compensation chamber 22 via a second sealing gap 21, which is formed between the outer wall of the first piston and the inner wall of the housing. The first transmission chamber 10 is hydraulically coupled via a bore 60, which is introduced into the first piston 6, with the compensation chamber 22. The compensation chamber 22 is bounded by a rear surface 14 of the first piston and by a device which is described in detail with reference to FIG FIG. 4 is described.

Die Vorrichtung umfasst in der Ausführungsform der Übertragervorrichtung gemäß Figur 2 eine erste Hülse 52 und eine zweite Hülse 53 mit einem kleineren Durchmesser als die erste Hülse 52. Zwischen der ersten und zweiten Hülse 52, 53 ist ein Elastomer 50 eingebracht. Die erste Hülse 52 ist fest mit dem Gehäuse 4, bevorzugt mittels Schweißen, verbunden. Die zweite Hülse 53 ist fest mit dem ersten Kolben 6 verbunden, bevorzugt ebenfalls mittels Schweißen.The device comprises in the embodiment of the transmitter device according to FIG. 2 a first sleeve 52 and a second sleeve 53 having a smaller diameter than the first sleeve 52. Between the first and second sleeve 52, 53 an elastomer 50 is introduced. The first sleeve 52 is fixedly connected to the housing 4, preferably by welding. The second sleeve 53 is fixedly connected to the first piston 6, preferably also by welding.

In einer zweiten Ausführungsform der Übertragervorrichtung (Figur 3) ist das Elastomer 50 in den Zwischenraum zwischen dem ersten Kolben 6 und dem Endbereich des Gehäuses 5 eingebracht. Die Ausführungsform gemäß Figur 2 bietet den Vorteil, dass die erste und zweite Hülse 52, 53 und das Elastomer vorab hergestellt werden können. Das Elastomer 50 soll durch seine elastischen Eigenschaften eine Vergrößerung des Volumens der Ausgleichskammer 22 ermöglichen und so zu große Druckerhöhungen vermeiden.In a second embodiment of the transmitter device ( FIG. 3 ), the elastomer 50 is introduced into the space between the first piston 6 and the end portion of the housing 5. The embodiment according to FIG. 2 offers the advantage that the first and second sleeves 52, 53 and the elastomer can be prepared in advance. The elastomer 50 is intended to allow an increase in the volume of the compensation chamber 22 by its elastic properties and thus avoid excessive pressure increases.

Die erste und die zweite Übertragerkammer 10, 11 und die Ausgleichskammer 22 sind mit einem Fluid, vorzugsweise Öl, gefüllt. Das Gehäuse 5, der erste Kolben 6 und der zweite Kolben 7 und auch die ersten und zweiten Hülsen 52, 53 sind vorzugsweise aus Stahl hergestellt. Bevorzugt ist ein Spannmittel 54, das vorzugsweise als Spiralfeder ausgebildet ist, vorgesehen, dass sich einerseits an einem Anschlagring 55 abstützt und andererseits auf das Elastomer 50 einwirkt. Das Spannmittel ist so vorgespannt, dass es das Elastomer 50 in Richtung auf die Ausgleichskammer 22 mit einer vorgegebenen Kraft vorspannt.The first and second transfer chambers 10, 11 and the compensation chamber 22 are filled with a fluid, preferably oil. The housing 5, the first piston 6 and the second piston 7 and also the first and second sleeves 52, 53 are preferably made of steel. Preferably, a tensioning means 54, which is preferably designed as a spiral spring, provided that on the one hand supported on a stop ring 55 and on the other hand acts on the elastomer 50. The tensioning means is biased to bias the elastomer 50 toward the balance chamber 22 with a predetermined force.

In Figur 4 ist die Vorrichtung mit einem ersten Körper, der als erste Hülse 52 ausgebildet ist, mit einem zweiten Körper, der als zweite Hülse 53 ausgebildet ist und dem Elastomer 50 dargestellt. Der erste Körper ist bei der Ausführungsform der Übertragervorrichtung 3 gemäß Figur 3 das Gehäuse 5 und der zweite Körper ist der erste Kolben 6.In FIG. 4 For example, the device is provided with a first body formed as a first sleeve 52 with a second body formed as a second sleeve 53 and the elastomer 50. The first body is in accordance with the embodiment of the transmitter device 3 FIG. 3 the housing 5 and the second body is the first piston 6.

Das Elastomer 50 ist so in den Zwischenbereich zwischen der ersten Hülse 52 und der zweiten Hülse 53 eingebracht, dass es diesen verschließt und abdichtet. In dem Elastomer 50 ist eine erste Nut 61 ausgebildet, die sich beabstandet zu der Wandung der Ausnehmung entlang der Ausnehmung erstreckt. Sie ist, wie in der Draufsicht in Figur 5 dargestellt, umlaufend innerhalb der Ausnehmung der ersten Hülse 52, d.h. des von der Hülse 52 im Inneren umschlossenen Bereichs. Sie ist bevorzugt beabstandet zu der Wandung der ersten Hülse mit einem Abstand von 0,2 bis 1,5 mm bezogen auf die Nutmitte angeordnet. Die Tiefe der ersten Nut ist bevorzugt zwischen 0,2 und 1,5 mm gewählt. Durch die Nut wird bewirkt, dass Druckkräfte, die durch eine Relativbewegung des ersten Kolbens 6 zu dem zweiten Kolben 7 entstehen, auch radial auf das Elastomer einwirken und somit das Elastomer gegen die Wandung der ersten Hülse 52 drücken und so dessen Dichtwirkung deutlich erhöhen.The elastomer 50 is introduced into the intermediate region between the first sleeve 52 and the second sleeve 53 in such a way that it closes and seals it. In the elastomer 50, a first groove 61 is formed, which extends at a distance from the wall of the recess along the recess. It is, as in the top view in FIG. 5 represented, circumferentially within the recess of the first sleeve 52, ie the area enclosed by the sleeve 52 in the interior. It is preferably spaced from the wall of the first sleeve with a distance of 0.2 to 1.5 mm relative to the groove center. The depth of the first groove is preferably selected between 0.2 and 1.5 mm. By the groove causes compressive forces, which are caused by a relative movement of the first piston 6 to the second piston 7, also act radially on the elastomer and thus press the elastomer against the wall of the first sleeve 52 and thus significantly increase its sealing effect.

Ferner ist eine zweite Nut 62 vorgesehen, deren hochlaufende Kante bevorzugt zwischen 0,2 und 1,5 mm zu der zweiten Hülse 53 beabstandet ist. Durch die zweite Nut 62 wird sichergestellt, dass der in der Ausgleichskammer 22 herrschende Druck auch radial auf die zweite Hülse 53 einwirkt und somit das Elastomer 50 gegen die zweite Hülse 53 presst. Dadurch wird ebenfalls die Dichtwirkung im Hinblick auf die zweite Hülse 53 deutlich verbessert.Further, a second groove 62 is provided, the up-running edge preferably between 0.2 and 1.5 mm to the second sleeve 53 is spaced. It is ensured by the second groove 62 that the pressure prevailing in the compensation chamber 22 also acts radially on the second sleeve 53 and thus presses the elastomer 50 against the second sleeve 53. As a result, the sealing effect with respect to the second sleeve 53 is also significantly improved.

Bevorzugt ist die zweite Nut 62 weniger tief ausgebildet als die erste Nut 61. Dem liegt die Erkenntnis zugrunde, dass bereits eine weniger tiefe zweite Nut ausreicht, um eine ausreichende Dichtigkeit des Elastomers 50 an der zweiten Hülse 53 zu gewährleisten im Gegensatz zu der ersten Hülse 52. Darüber hinaus ist eine möglichst geringe Tiefe der Nuten 61, 62 wünschenswert im Hinblick auf eine Minimierung des Volumens der Ausgleichskammer 22. Dadurch dass die zweite Nut 62 direkt in die erste Nut 61 mündet, ist ein einfacheres Entformen des Werkzeugs möglich, mit dem das Elastomer in seine Form gebracht wird, was insbesondere im Hinblick auf sehr kleine Dimensionen die Vorrichtung deutlich einfacher herstellbar macht.Preferably, the second groove 62 is formed less deep than the first groove 61. This is based on the knowledge that even a less deep second groove is sufficient to ensure sufficient tightness of the elastomer 50 to the second sleeve 53 in contrast to the first sleeve 52. In addition, the smallest possible depth of the grooves 61, 62 desirable in terms of minimizing the volume of the compensation chamber 22. The fact that the second groove 62 opens directly into the first groove 61, a simpler demolding of the tool is possible with the the elastomer is brought into its shape, which makes the device much easier to manufacture, especially with regard to very small dimensions.

Zum Herstellen der Vorrichtung gemäß Figur 4 wird der als erste Hülse 52 ausgebildete erste Körper und der als zweite Hülse 53 ausgebildete zweite Körper plasmaaktiviert. Dies erfolgt vorzugsweise durch Spülen mit ionisiertem Gas, z.B. Sauerstoff, wodurch Radikalstellen an der Metalloberfläche gebildet werden, die eine sehr starke Bindungsfreudigkeit der Oberfläche der ersten und zweiten Hülse 52, 53 zur Folge haben. Anschließend wird ein Haftvermittler auf die erste und zweite Hülse aufgebracht, vorzugsweise in dem Bereich, in dem das Elastomer 50 anliegen soll. Die Wirkung des Haftvermittlers ist umso besser je dünner die Schicht ist, die mit dem Haftvermittler versehen ist. Idealerweise handelt es sich hierbei um eine monomolekulare Schicht.For producing the device according to FIG. 4 the first body formed as a first sleeve 52 and the second body formed as a second sleeve 53 is plasma-activated. This is preferably done by rinsing with ionized gas, eg oxygen, whereby radical sites are formed on the metal surface, which result in a very strong bondability of the surface of the first and second sleeves 52, 53. Subsequently, a bonding agent is applied to the first and second sleeve, preferably in the region in which the elastomer 50 is intended to abut. The effect of the primer is better the thinner the layer provided with the primer. Ideally, this is a monomolecular layer.

Durch die verrundeten Kanten der ersten und zweiten Hülse 52, 53 wird gewährleistet, dass der Haftvermittler sich einfach gleichmäßig verteilen kann. Versuche haben gezeigt, dass zu scharfe Kanten zu einer ungleichmäßigen Verteilung des Haftvermittlers und somit zu lokalen Schichtdickenveränderungen führen können, was zur Folge hat, dass in den dickeren Bereichen des Haftvermittlers das Elastomer nicht so gut an der ersten bzw. zweiten Hülse 52, 53 haftet und somit hierdurch Undichtigkeiten auftreten können.The rounded edges of the first and second sleeves 52, 53 ensure that the bonding agent is easy can distribute evenly. Experiments have shown that too sharp edges can lead to an uneven distribution of the adhesion promoter and thus to local changes in layer thickness, with the result that in the thicker regions of the adhesion promoter, the elastomer does not adhere so well to the first and second sleeves 52, 53 and thus leaks can occur.

In einem nächsten Herstellungsschritt werden die ersten und zweiten Hülsen 52, 53 in ein entsprechendes Formwerkzeug eingelegt und anschließend die Elastomermasse eingespritzt und mittels eines Vulkanisierungsprozesses dauerhaft in ihre Form gebracht.In a next production step, the first and second sleeves 52, 53 are inserted into a corresponding molding tool and then the elastomer composition is injected and permanently brought into its shape by means of a vulcanization process.

Ein weiteres Ausführungsbeispiel der Vorrichtung ist anhand von Figur 6 dargestellt. Statt der Ringform ist hier der rohrförmig ausgebildete erste Körper in einer rechteckigen Grundform ausgebildet. Alternativ können der erste und zweite Körper jedoch auch in weiteren Rohrformen ausgebildet sein wie einer Ellipsen-Grundform.Another embodiment of the device is based on FIG. 6 shown. Instead of the ring shape, the tubular body of the first body is formed here in a rectangular basic shape. Alternatively, however, the first and second bodies can also be formed in further tube shapes, such as an elliptical basic shape.

Die erste Nut 61 ist in dieser Ausführungsform nicht umlaufend ausgebildet, sondern nur abschnittsweise, vorzugsweise in Bereichen, in denen eine zusätzliche radiale Anpresskraft des Elastomers 50 notwendig ist, um die gewünschte Dichtwirkung und Dauerhaltbarkeit der Vorrichtung zu gewährleisten.The first groove 61 is not circumferentially formed in this embodiment, but only in sections, preferably in areas where an additional radial contact pressure of the elastomer 50 is necessary to ensure the desired sealing effect and durability of the device.

In einer weiteren alternativen Ausführungsform der Vorrichtung ist die erste Nut 61 in radialer Richtung so breit ausgebildet, dass über ihre zu der ersten Hülse 52 zugewandten Wandung ausreichend Kräfte auf diese Wandung ausgeübt werden, um die Dichtigkeit in Bezug auf die erste Hülse 52 zu gewährleisten und gleichzeitig über die Wandung, die zu der zweiten Hülse 53 zugewandt ist, ausreichende Anpresskräfte übertragen werden, die bezüglich der zweiten Hülse 53 eine ausreichende Dichtigkeit gewährleisten. Die Vorrichtung gemäß Figur 4, 5, 6 und 7 kann außer für eine Übertragervorrichtung 3 auch für eine beliebige andere Kammervorrichtung eingesetzt werden.In a further alternative embodiment of the device, the first groove 61 is formed so wide in the radial direction that sufficient forces are exerted on this wall via its facing to the first sleeve 52 wall forces to ensure the tightness with respect to the first sleeve 52 and at the same time over the wall, which faces the second sleeve 53, sufficient contact forces are transmitted, which ensure a sufficient tightness with respect to the second sleeve 53. The device according to FIG. 4 . 5, 6 and 7 can be used except for a transmitter device 3 for any other chamber device.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

11
EinspritzventilInjector
22
Aktoractuator
33
Übertragervorrichtungtransmission device
44
Düsennadelnozzle needle
55
Gehäusecasing
66
erster Kolbenfirst piston
77
zweiter Kolbensecond piston
88th
Ausnehmung des GehäusesRecess of the housing
99
Ausnehmung in erstem KolbenRecess in the first piston
1010
erste Übertragerkammerfirst transformer chamber
1111
weite Übertragerkammerwide transformer chamber
1313
Rückfläche des zweiten KolbensRear surface of the second piston
1515
Endfläche des GehäusesEnd face of the housing
1616
weitere Ausnehmung in Gehäusefurther recess in the housing
1717
erste Stirnfläche von 1. Kolbenfirst face of 1st piston
1818
erster Dichtspaltfirst sealing gap
1919
zweite Stirnfläche des 1. Kolbenssecond end face of the 1st piston
2020
Stirnfläche des 2. KolbensFace of the 2nd piston
2121
zweiter Dichtspaltsecond sealing gap
2222
Ausgleichskammercompensation chamber
2323
Rückfläche des ersten KolbensRear surface of the first piston
5050
Elastomerelastomer
5151
Kolbenstangepiston rod
5252
erste Hülsefirst sleeve
5353
zweite Hülsesecond sleeve
5454
Spannmittel/SpiralfederClamping means / helical spring
5555
Anschlagringstop ring
5656
Übertragungsmitteltransmission means
5757
Schutzschichtprotective layer
5959
abgestufte Durchführunggraduated implementation
6060
Bohrungdrilling
6161
erste Nutfirst groove
6262
zweite Nutsecond groove

Claims (13)

  1. Transmission device for an injection valve (1), which transmission device transmits a deflection of an actuator (2), having a housing (5) which has a first recess in which a first and second piston (6, 7) are mounted in movable fashion, and the first and the second piston (6, 7) are operatively connected by means of a fluid via at least one transmitter chamber (10, 11), wherein the operative connection effects a displacement of the second piston (7) when the first piston (6) is moved and vice versa, wherein the transmitter chamber (10, 11) is hydraulically connected via a sealing gap (21) to an equalization chamber (22), which sealing gap compensates pressure differences between the transmitter chamber (10, 11) and the equalization chamber (22) with a delay, and having a chamber device with a chamber which has a chamber housing which has a recess, with a piston and with a device, which has the following features: a first body, which has a recess, a second body, which is inserted into the recess, and an elastomer, which is introduced between the first and second body into the recess and thus closes and seals off, in said region, the intermediate space between the first and the second body, wherein the elastomer (50) has a first groove (61) which extends, spaced apart from the wall of the recess, at least partially along the recess, wherein the regions of the first and second body against which the elastomer bears are free from edges, and wherein the chamber is the equalization chamber (22), the chamber housing is the housing (5) and the piston is the first piston (6),
    characterized
    in that a second groove (62) is formed in the elastomer (50), which second groove runs radially within the first groove,
    and in that first groove (61) is deeper than the second groove (62).
  2. Transmission device according to the preceding claim, wherein the first piston (6) has the form of a ring-shaped cylinder which is open on one side and which delimits the transmitter chamber (10) and in which the second piston (7) is guided, such that the transmitter chamber (10) is delimited by a face surface (19) of the first piston (6) and a face surface (20) of the second piston (7).
  3. Transmission device according to the preceding claim, wherein the equalization chamber (22) is delimited by a rear surface (14) of the first piston (6) and the chamber device.
  4. Transmission device according to one of the preceding Claims 2 or 3, wherein the second piston (7) has a ring-shaped shoulder at which its diameter abruptly increases and which forms a ring-shaped rear surface (13), and wherein a face surface (17) of the first piston (6), the ring-shaped rear surface (13) of the second piston (7) and an end surface (15) of the housing (5) delimit a second transmitter chamber (11).
  5. Transmission device according to the preceding claim, wherein the second transmitter chamber (11) is hydraulically connected to the transmitter chamber (10) via a first sealing gap (18) which is formed between a side wall of the second piston (7) and an inner wall of the first piston (6),
    and wherein the second transmitter chamber (11) is connected to the equalization chamber (22) via a second sealing gap (21) which is formed between an outer wall of the first piston (6) and an inner wall of the housing (5).
  6. Transmission device according to one of the preceding claims,
    characterized in that
    the first groove (61) is formed in encircling fashion within the recess.
  7. Transmission device according to one of the preceding claims,
    characterized in that
    the first groove is spaced apart from the wall of the recess of the first body by 0.2 to 1.5 mm.
  8. Transmission device according to one of the preceding claims,
    characterized in that
    the second groove is spaced apart from the abutment of the elastomer (50) against the second body by 0.2 to 1.5 mm.
  9. Transmission device according to one of the preceding claims,
    characterized in that
    the second groove (62) is of such a width that it opens into the first groove (61).
  10. Transmission device according to one of the preceding claims,
    characterized in that
    the first and second bodies are of tubular form.
  11. Transmission device according to one of the preceding claims,
    characterized in that
    the chamber housing is the first body and/or the piston is the second body.
  12. Transmission device according to Claim 10, characterized in that
    the chamber housing is connected to the first body and the piston is connected to the second body.
  13. Transmission device according to the preceding claim,
    characterized in that
    the chamber housing is welded to the first body and the piston is welded to the second body.
EP04804690.8A 2003-12-05 2004-12-06 Device, method for producing the device, chamber device and transfer device Not-in-force EP1690025B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10356848 2003-12-05
PCT/EP2004/053285 WO2005054725A1 (en) 2003-12-05 2004-12-06 Device, method for producing the device, chamber device and transfer device

Publications (2)

Publication Number Publication Date
EP1690025A1 EP1690025A1 (en) 2006-08-16
EP1690025B1 true EP1690025B1 (en) 2017-05-03

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP04804690.8A Not-in-force EP1690025B1 (en) 2003-12-05 2004-12-06 Device, method for producing the device, chamber device and transfer device

Country Status (5)

Country Link
US (1) US7726625B2 (en)
EP (1) EP1690025B1 (en)
JP (1) JP2007515604A (en)
CN (1) CN100523568C (en)
WO (1) WO2005054725A1 (en)

Families Citing this family (4)

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DE102006048727A1 (en) * 2006-10-16 2008-04-17 Robert Bosch Gmbh Fuel injector with solenoid valve
DE102010031497A1 (en) * 2010-07-19 2012-01-19 Robert Bosch Gmbh Fuel injector with hydraulic coupler unit
DE102014205910A1 (en) * 2014-03-31 2015-10-01 Robert Bosch Gmbh Fuel injector
CN109958564B (en) * 2017-12-26 2023-09-29 天津大学（青岛）海洋工程研究院有限公司 Electromagnetic valve for common rail type electric control fuel injector of diesel engine

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Also Published As

Publication number Publication date
US20070241295A1 (en) 2007-10-18
EP1690025A1 (en) 2006-08-16
CN1890493A (en) 2007-01-03
WO2005054725A1 (en) 2005-06-16
CN100523568C (en) 2009-08-05
JP2007515604A (en) 2007-06-14
US7726625B2 (en) 2010-06-01

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