EP1920475A1 - Actionneur piezoelectrique pourvu d'un corps de retenue en deux parties - Google Patents

Actionneur piezoelectrique pourvu d'un corps de retenue en deux parties

Info

Publication number
EP1920475A1
EP1920475A1 EP06777844A EP06777844A EP1920475A1 EP 1920475 A1 EP1920475 A1 EP 1920475A1 EP 06777844 A EP06777844 A EP 06777844A EP 06777844 A EP06777844 A EP 06777844A EP 1920475 A1 EP1920475 A1 EP 1920475A1
Authority
EP
European Patent Office
Prior art keywords
holding body
piezoelectric element
actuator according
piezoelectric
piezoelectric actuator
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP06777844A
Other languages
German (de)
English (en)
Inventor
Rudolf Heinz
Dieter Kienzler
Udo Schaich
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP1920475A1 publication Critical patent/EP1920475A1/fr
Withdrawn legal-status Critical Current

Links

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
    • F02M51/00—Fuel-injection apparatus characterised by being operated electrically
    • F02M51/005—Arrangement of electrical wires and connections, e.g. wire harness, sockets, plugs; Arrangement of electronic control circuits in or on fuel injection apparatus
    • 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
    • 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
    • F02M61/168—Assembling; Disassembling; Manufacturing; Adjusting
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10N30/00—Piezoelectric or electrostrictive devices
    • H10N30/80—Constructional details
    • H10N30/87—Electrodes or interconnections, e.g. leads or terminals
    • H10N30/875—Further connection or lead arrangements, e.g. flexible wiring boards, terminal pins
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10N30/00—Piezoelectric or electrostrictive devices
    • H10N30/80—Constructional details
    • H10N30/88—Mounts; Supports; Enclosures; Casings
    • 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
    • F02M2200/80—Fuel injection apparatus manufacture, repair or assembly
    • F02M2200/8076—Fuel injection apparatus manufacture, repair or assembly involving threaded members

Definitions

  • the invention relates to a piezoelectric actuator, for example as a piezo injector or for actuating a mechanical component such as a valve or the like, according to the preamble of claim 1.
  • a piezoelectric element can be used in such a way that, by utilizing the so-called piezoelectric effect, a control of the needle stroke of a valve or the like can be carried out.
  • the piezoelectric element is constructed of a material having a suitable crystal structure such that upon application of an external electrical voltage, a mechanical reaction of the piezoelectric element takes place, which represents a pressure or tension in a predeterminable direction as a function of the crystal structure and the contact regions of the electrical voltage.
  • Such piezoelectric actuators are suitable, for example, for applications in which lifting movements take place under high operating forces and high clock frequencies.
  • such a piezoelectric injector is known from DE 100 26 005 A1, which can be used to control the nozzle needle in injectors for injecting fuel into the combustion chamber of an internal combustion engine.
  • this piezoelectric actuator is a piezoelectric element, as mentioned, as Sta- pel more electrically interconnected piezoceramic layers constructed, which is held under bias between two stops. Each piezoceramic layer is enclosed as a piezoelectric layer between two internal electrodes via which an electrical voltage can be applied from the outside. Because of this electrical voltage, the piezoceramic layers then each carry out small strokes in the direction of the potential gradient, which add up to the total stroke of the piezoelectric actuator. This total stroke is variable by the amount of voltage applied and can be transferred to a mechanical actuator.
  • a piezoelectric actuator is also described in EP 1 174 615 A3, in which a piezoelectric element is present as an actuator for the direct needle stroke control of an injection injector for an internal combustion engine. Between the piezo element as an actuator and the needle sits only a coupler with a hydraulic ratio to the expansion compensation. With an activation of the piezoelectric element in this case the held under bias to the closure of the injection nozzle needle is moved away from the nozzle opening, as the needle directly translated follows the movement of the actuator. Piezo element, coupler and needle thereby form parts of an actuator, by means of which, for example, in the case of an injection injector, for example, fuel or another fluid can be metered into the combustion chamber of an internal combustion engine.
  • FIG. 7 shows a basic structure of a single-stage piezoactuator 1 according to the prior art, which can be used, for example, for needle lift control in the injection system for fuel in an internal combustion engine.
  • a holding body 2 In the upper part of a holding body 2 is present, which can be adjusted in its geometrical dimensions substantially to the specific site.
  • a plug part On the holding body 2, a plug part, not shown here, is present, through which, with a connector design which is likewise adapted specifically to the application, the electrical voltage tion for driving a arranged in an interior 4 of the holding body 2 piezoelectric element 3 can be connected.
  • the piezoelectric element 3 is according to Figure 7 via an actuator base 8 at the top of a spherical sealing seat in the interior 4 of the holder body 2, wherein the piezoelectric element 3 is pressed to effect a good sealing seat with a spring 9.
  • a high-pressure seal is necessary here for an electrical connection space arranged above the piezoelectric element 3 and above the interior 4 in the holding body 2, through which the electrical lines are led for electrical contacting of the piezoelectric element 3 ,
  • a disadvantage of the prior art is that depending on the specific installation situation of the piezoelectric actuator, the holding body to the corresponding external boundary conditions, such as outer layer of electrical connections, outer layer of connections for the fluid to be dosed, external dimensions and the like, as well as to the Piezoelement and that the piezoelectric element comprehensive actuator predetermined inner boundary conditions, such as the electrical contacting of the piezoelectric element by the holding body through, size and dimensions of the interior, arrangement and Dimensions of the coupler, the nozzle needle and the like, very complex individually customized.
  • a piezoelectric actuator according to the invention as piezoinjector of the type mentioned by the holding body is made in two parts and a division of the holding body festlegender dividing cross section is preferably arranged in a region of the holding body in which the electrical contacting of the Piezo element is preferably produced for example by means of a plug connection and thus passes through the pitch cross-section.
  • the division cross section may lie within a plane, or within a plurality of substantially parallel planes.
  • the piezoelectric actuator which mainly relate to the outer shape of the holding body, and in particular include the outer layer of the electrical connections and the outer connections for the fluid can be realized with the two-part holding body easier and cheaper, since so It is possible, for example, to produce different holding body upper parts adapted to different installation situations, as well as only one or a few different holding body lower parts which are essentially adapted to the piezoelectric element or to the boundary conditions predetermined predominantly by the piezoelectric element and which can then be combined with one another as desired.
  • An advantageous embodiment of the invention provides that the two-part holding body substantially radially defining the interior and thus defining the length and the cross section of the interior, the Piezoelement substantially concentrically enclosing holding body lower part, as well as with the holding body lower part fixed or detachably connectable, essentially the interior of one side endally limiting and substantially the electrical contact, the flow channels and the connections exhibiting holding body upper part comprises.
  • the holding body upper part substantially is adapted to the given by the use-specific installation situation of the piezoelectric actuator, the position of the connections predetermining boundary conditions.
  • An advantageous embodiment of the invention provides that the connection between the upper part of the body and the lower part of the body is standardized for the modular construction of a holding body of arbitrary upper body parts and lower body parts.
  • a particularly advantageous embodiment provides that the holding body lower part which is essentially adapted to the piezoelectric element and the actuator is standardized, whereas the holding body upper part is adapted to the specific installation.
  • a holding body upper part with a laterally arranged electrical connection for the electrical contacting of the piezoelectric element through the holding body, as well as a central connection for the fluid arranged essentially axially to the piezoelectric element. It is also conceivable to provide a holding body upper part with a laterally arranged electrical connection for electrical contacting of the piezoelectric element through the holding body, as well as a laterally arranged connection for the fluid.
  • a holding body upper part with a central, arranged substantially axially to the piezoelectric element arranged electrical connection for electrical contacting of the piezoelectric element through the holding body, as well as a laterally arranged connection for the fluid is arranged, for example, to provide a holding body upper part with a laterally arranged electrical connection for the electrical contacting of the piezoelectric element through the holding body, as well as a central connection for the fluid arranged essentially axially to the piezoelectric element.
  • the piezoelectric element is fixedly or detachably arranged on a front wall of the holding body upper part bounding the inside of the front side.
  • at the inner end face bounding end wall of the holding body upper part and on the upper side facing the holding body upper part of the piezoelectric element can be arranged with each other corresponding electrical connectors for electrical contacting of the piezoelectric element.
  • this enables a detachable electrical contacting of the piezoelectric element, for example for quality control, such as for functional tests.
  • this principle allows a detachable connection between the upper body part and the piezoelectric element.
  • the production of the piezoelectric actuator is greatly simplified by the electrical connector, since in an arrangement of the piezoelectric element on the holding body upper part only the mechanical connection between the piezoelectric element and the holding body upper part must be made, and the electrical contact by means of the electrical connector already at the preparation of the piezoelectric element the holding body upper part is produced.
  • the piezoelectric element comprises a stack of Piezola- gene in the direction of the holding body upper part frontally final actuator foot, said arranged on the piezoelectric element electrical connectors are arranged in the actuator base.
  • the electrical plug connection between the holding body upper part and the piezoelectric element can be embodied symmetrically or asymmetrically.
  • the connector as Poka-Yoke be executed, for example, with a thin and thick pin or with pin and socket or with short and long pin. It is also conceivable that in the holding body upper part, the sockets, and in the piezoelectric element or in the actuator base of the piezoelectric element, the pins of the electrical connector are arranged, or vice versa.
  • the connector on markers for detecting the polarity and / or the correct arrangement of the piezoelectric element.
  • the markings are preferably arranged on the holding body upper part and the piezoelectric element.
  • the markers may include, for example, color markers.
  • An additional advantageous embodiment of the invention provides that at the front side of the inner wall limiting the end wall of the holding body upper part arranged plug connections for electrical contacting of the piezoelectric element by means of a sealing between the piezoelectric element and the pressurized fluid receiving interior and the environment causing the sealing bush in the holding body shell are arranged.
  • the sealing bush is preferably poured or sprayed with ceramic cement, with plastic, with glass or the like.
  • a particularly advantageous embodiment of the invention provides that the piezoelectric element is firmly connected to the holding body upper part, wherein the actuator foot is preferably welded or glued to the front wall of the holding body upper part bounding the interior of the holding body, so that a seal for the fluid between that of the Fluid occupied part of the interior and the electrical connector and / or the electrical contact between the piezoelectric element and the upper body part is formed.
  • FIG. 1 shows a partial section through a first piezoelectric actuator according to the invention with the upper part of the body and the actuator base welded together, FIG.
  • FIG. 2 shows a schematic representation of a first holding body upper part according to the invention
  • FIG. 3 a schematic representation of a second holding body upper part according to the invention
  • FIG. 4 shows a partial section through a second piezoelectric actuator according to the invention with the upper part of the holding body and the actuator base glued together,
  • FIG. 5 shows a detailed view of a plug connection arranged in the holding body upper part
  • FIG. 6 shows a partial section through a third piezoelectric actuator according to the invention with the holding body upper part and actuator foot detachably connected to one another
  • 7 shows a longitudinal section through a piezoelectric actuator with a basic geometric structure according to the prior art
  • the invention is described below using the example of a piezoelectric actuator for use in a common rail injection injector with direct needle control.
  • An inventive piezoelectric actuator 10 as a piezoinjector shown in FIG. 1, FIG. 4 and FIG. 6 consists essentially of a two-part holding body 20 having an interior 40 and a piezoelectric element 30 arranged in the interior 40 and electrically contactable by the holding body 20.
  • the holding body 20 comprises a holding body upper part 21, as well as a holding body lower part 22.
  • the holding body upper part 21 has a receptacle 92 for an electrical connection for making electrical contact with the piezoelectric element 30 through the holding body 30.
  • the holding body upper part 21 has a connection 25, 26 shown in FIGS. 2 and 3 for supplying a fuel which can be metered by means of an actuator comprising the piezoelectric element 30 into the interior 40 and flow channels 41 leading into the interior 40 from the connection 25, 26 ,
  • the flow channels 41 open into the remaining annular space of the inner space 40 between the piezoelement 30 and the holding body lower part concentrically surrounding the piezoelectric element 30.
  • one of the inner cross-sectional dimensions is equal to the outer cross-sectional dimensions of the piezoelectric element.
  • elements 30 corresponding insulating sleeve 32 comprehensive piezoelectric element 30 surrounded by the flowing through the remaining annular space of the interior 40 fuel. Such an arrangement is called a wet arrangement.
  • the holding body lower part 22 essentially forms the inner space 40 surrounding the piezoelectric element 30 concentrically, in which the holding body lower part 21 radially delimits the inner space 40 and thus essentially defines the length and the cross section of the inner space 40.
  • the holding body upper part 21 limits the interior space 40 from one side at the front side. In the holding body upper part 21 are substantially the electrical contact 42, the flow channels 41 and the terminals 25, 26 are arranged.
  • the dividing cross section defining the division of the holding body lies in a region of the holding body 20 in which the electrical contacting of the piezoelectric element 30 can be interrupted by means of a plug connection 61.
  • the plug connection 61 is arranged between the holding body upper part 21 and the piezoelectric element 30.
  • the piezoelectric element 30 comprises an unspecified stack 31 of piezolayers in the direction of the holding body upper part 21 end side actuator foot 80, in which the piezoelement Indeeden part of the connector 61 forming plug 82, 83, 84, 85, 86, 87 are arranged, and a arranged between the actuator base 80 and the stack 31 of the piezoelectric layers ceramic insulation 81.
  • electrodes 44 serve the internal contacting of the piezoelectric layers.
  • the holding body upper part 62 forming the second part of the electrical plug connection 61, 63, 64, 65, 66, 67 are arranged.
  • the holding body lower part 22 is substantially at the by the piezoelectric element 30, for example, a piezoelectric element 30, a coupler and a nozzle needle comprehensive actuator, and for example the used Fuel and / or the injection quantity predetermined geometry of the interior 40 adapted.
  • the holding body lower part 22 can thus be largely standardized and designed largely independent of installation-specific boundary conditions.
  • the holding body upper part 21, as shown in Figures 2 and 3 substantially to installation specific, essentially predetermined from the outside boundary conditions, such as the position of the terminals 25, 26 for the fuel and / or the required length between the piezoelectric element and terminal 25th , 26, 92 and / or the diameter at the upper end of the holding body 20 adapted.
  • the holding body upper part 23 shown in FIG. 2 has a laterally arranged receptacle 92 for an electrical connection for electrical contacting of the piezoelectric element 30 through the holding body 20, as well as a laterally arranged connection 25 for the fuel.
  • the holding body upper part 24 shown in FIG. 3 has a laterally arranged receptacle 92 for an electrical connection for electrically contacting the piezoelectric element 30 through the holding body 20, as well as a central connection 26 for the fuel arranged substantially axially to the piezoelectric element 30.
  • connection between the upper body part 21 and the lower body part is designed in a standardized manner so that a holding body 20 adapted to a specific use-specific installation situation can be produced by assembling any desired upper body parts 21 and lower body parts 22.
  • the holding body upper part 21 is adapted to the specific installation, whereas the holding body lower part is standardized.
  • the connection is made in the embodiment in Figures 1, 4 and 6 by means of a clamping nut 45th
  • the piezoelectric element 30 is fixedly or detachably arranged on the end wall 43 of the holding body upper part 21 delimiting the inner space 40 on the end face.
  • the piezoelectric element 30 is fixedly connected to the holding body upper part 21 by means of a welded connection 91 which firmly connects the actuator foot 80 to the end wall 43.
  • the piezoelectric element can also be firmly connected to the holding body upper part by means of an adhesive connection between actuator foot 80 and end wall 43.
  • the connector 61 can be secured by means of sealing bushes 72, 73, 74, 75 against the ingress and egress of fuel.
  • the single-pole sealing bushes 72, 73 in Figure 1 and the two-pole sealing bushes 76 in Figures 4 and 6 are formed as conical sleeves, which are hydraulically pressed in the holding body shell.
  • the two-pole sealing bushes 74, 75 in Figures 4 and 6, however, are made by filling of the sealing bushes 74, 75 receiving recesses with ceramic cement, a molten glass or a plastic.
  • the electrical plug connection 61 between the holding body upper part 21 and the piezoelectric element 30 may be symmetrical, as shown in FIG. 1, or asymmetrical.
  • the connector 61 may be designed as a poka-yoke, for example, as in Figure 4 with thick 65 and thin 64 pin in the upper body part 21 and thicker 85 and thinner bushing 84 in the actuator base, or as in Figure 5 with thin socket 68th and thick pin 69 in the holding body upper part 21 and thin pin and thick socket in the actuator base 80, or as shown in FIG.
  • the sealing bush in FIG. 5, which can be arranged in the upper part of the holding body 21, consists of a slightly conical steel casing into which the electrical contact 42 with glass has melted.
  • the sealing bush 76 can be hydraulically pressed in the holding body upper part 21. The remaining part of the recess is filled in the sealing bushing 75 with ceramic cement, injected at the sealing bush 74 with plastic.
  • the connector 61 has color markings for detecting the polarity and / or the correct arrangement of the piezoelectric element 30 relative to the end face 43 of the holding body upper part 21.
  • FIG. 1 shows an electrical plug connection 61 integrated in the piezoactuator 10, which, together with the parallel electrical contacts 42 tapering upwards, occupy little space in the holding body upper part 21.
  • This arrangement allows a lateral placement of the electrical connection with central high-pressure connection for the fuel on the holding body upper part 21 ( Figure 3), or a lateral placement of the electrical connection with also side high-pressure connection for the fuel on the holding body upper part 21 ( Figure 2).
  • the connections can be arranged at an arbitrary angle with respect to the longitudinal axis of the piezo actuator fixed by the piezoelement. Likewise, they may be arranged at any position in the circumferential direction.
  • the holding body lower part can with a to be made of uniform diameter.
  • the holding body upper part 21 can be adapted by the upwardly tapering electrical contacts 42 to tight installation situations with only a small permissible diameter.
  • the production of the plug connection between the holding body upper part 21 and the piezoelectric element 30 in FIG. 1 takes place as follows.
  • the bushings 82, 83 designed as sleeves contact sleeves 46 of the piezoelectric element 30 are soldered to the over the ceramic insulation 81 protruding electrodes 44.
  • ceramic sleeves 47 are brought together with the actuator base 80 via the two contact sleeves 46 and glued as a unit with the ceramic insulation 81.
  • Two of the sealing bush 76 in Figure 5 similar sealing bushes 72, 73 are provided with insulation and hydraulically pressed in the holding body upper part 21.
  • the electrical contacts 42 are connected to a plug premixing and these are clipped into the receptacle 92.
  • the piezoelectric element 30 is assembled in the correct position by color marking with the holding body upper part 21 and welded.
  • the location of the arrangement of the piezoelectric element 30 at the inner wall 40 of the holding body 20 limiting end wall 43 is much easier accessible, in particular with regard to the manufacturing process, as in the prior art.
  • the invention is particularly applicable to the manufacture of piezoelectric actuators for use in conjunction with injection injectors for internal combustion engines.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Fuel-Injection Apparatus (AREA)

Abstract

L'invention concerne un actionneur piézoélectrique (10) qui comprend un corps de retenue (20) présentant un espace intérieur (40), ainsi qu'un élément piézoélectrique (30) disposé dans cet espace intérieur (40) et comprenant plusieurs couches piézoélectriques disposées sous la forme d'un empilement (31), cet élément piézoélectrique (30) pouvant être mis en contact électrique à travers le corps de retenue (20). Ledit corps de retenue (20) présente un ou plusieurs raccords (92) pour la mise en contact électrique (42) de l'élément piézoélectrique (30), ainsi qu'un ou plusieurs raccords (25, 26) et canaux d'écoulement (41) pour acheminer dans l'espace intérieur un fluide pouvant être dosé au moyen d'un organe de réglage comprenant l'élément piézoélectrique (30). L'invention se caractérise en ce que le corps de retenue (20) se présente en deux parties et en ce qu'une section de division déterminant la division en deux du corps de retenue (20) est disposée de préférence dans une zone dudit corps de retenue (20) dans laquelle la mise en contact électrique (42) de l'élément piézoélectrique (30) peut être réalisée de préférence au moyen d'un connecteur (61).
EP06777844A 2005-08-22 2006-07-19 Actionneur piezoelectrique pourvu d'un corps de retenue en deux parties Withdrawn EP1920475A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102005039551A DE102005039551A1 (de) 2005-08-22 2005-08-22 Piezoaktor mit zweiteiligem Haltekörper
PCT/EP2006/064394 WO2007023041A1 (fr) 2005-08-22 2006-07-19 Actionneur piezoelectrique pourvu d'un corps de retenue en deux parties

Publications (1)

Publication Number Publication Date
EP1920475A1 true EP1920475A1 (fr) 2008-05-14

Family

ID=36940037

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06777844A Withdrawn EP1920475A1 (fr) 2005-08-22 2006-07-19 Actionneur piezoelectrique pourvu d'un corps de retenue en deux parties

Country Status (3)

Country Link
EP (1) EP1920475A1 (fr)
DE (1) DE102005039551A1 (fr)
WO (1) WO2007023041A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009029529A1 (de) * 2009-09-17 2011-03-24 Robert Bosch Gmbh Magnetventil mit direkt kontaktierter Steuereinheit
DE102009046308A1 (de) * 2009-11-03 2011-05-05 Robert Bosch Gmbh Piezoelektrischer Aktor
DE102019208951B4 (de) * 2019-06-19 2024-04-04 Ford Global Technologies, Llc Kopplungsmechanismus und Verfahren zum Herstellen eines Kopplungsmechanismus

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE60126380T2 (de) * 2000-07-18 2007-11-15 Delphi Technologies, Inc., Troy Kraftstoffeinspritzventil
DE10315067A1 (de) * 2003-04-02 2004-10-28 Siemens Ag Piezoelektrischer Aktor mit einem zweiteiligen hülsenförmigen Gehäuse und Verfahren zur Herstellung eines Gehäuses für einen piezoelektrischen Aktor
DE10336327B4 (de) * 2003-08-07 2016-03-17 Robert Bosch Gmbh Injektor für Kraftstoff-Einspritzsysteme von Brennkraftmaschinen, insbesondere von direkteinspritzenden Dieselmotoren
DE10347770B4 (de) * 2003-10-14 2006-08-31 Siemens Ag Aufnahmehülse für einen Piezoaktor

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2007023041A1 *

Also Published As

Publication number Publication date
DE102005039551A1 (de) 2007-03-01
WO2007023041A1 (fr) 2007-03-01

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