Siemens Aktiengesellschaft

Continental Automotive Gmbh

Volkswagen Mechatronic Gmbh & Co.

Volkswagen Ag

Wilhelm Frank

Gerd Schmutzler

Reda Rizk

Andreas Voigt

G&uuml;nter Lewentz

Guenter Lewentz

Martin Neumaier

Stefan Lehmann

Andreas Fath

Wendelin Kluegl

Claus Zumstrull

Günter Lewentz

Eberhard Kull

Hakan Yalcin

Wendelin Kl&uuml;gl

Carsten Schuh

Harald Schmidt

Maximilian H Kronberger

Wendelin Klügl

Heinz Lixl

Joachim Wagner

Stephan Aurich

Thomas Komischke

Hartmut Gross

Jurgen Rink

Carsten Brandt

Rüdiger Gam

Jens Hömig

Joachim Vendulet

Maximilian Kronberger

The positioning of the actuating drive in a fuel injector with a piezoactuator () that is screwed into the housing () of the fuel injector is performed by applying a voltage (U) to the piezoactuator () that corresponds to a given idle stroke (h), and the surface grinding of the housing () and base plate () of the piezoactuator () when voltage is applied. Between the housing () of the fuel injector and the housing () of the piezoactuator (), there is also provided a compensation collar () of a suitable thickness.

Procedure for positioning the actuating drive in a fuel injector and device for performing the procedure

The positioning of the actuating drive in a fuel injector with a piezoactor () that is screwed into the housing () of the fuel injector is performed by applying a voltage (U) to the piezoactor () that corresponds to a given idle stroke (h), and the surface grinding of the housing () and base plate () of the piezoactor () when voltage is applied. Between the housing () of the fuel injector and the housing () of the piezoactor (), there is also provided a compensation collar () of a suitable thickness.

Method for producing a compensation collar for an injection valve

In a method for the hydro-erosive rounding of an edge of a part, particularly an edge in a duct of a high pressure-resistant part, and a use thereof, a liquid to which abrasive elements are added is directed along the edge that is to be rounded. In order to optimize the result of the rounding process, a high-viscosity liquid is used as a liquid (). The inventive method is used for rounding parts of a fuel injection system.

Method for hydro-erosive rounding of an edge of a part and use thereof

An electrode guide and a method for the spark-erosion of workpieces are disclosed. The electrode guide (), consisting of a two-piece prism-shaped () guide with a pretensioning device (), enables an electrode () to be guided in a play-free manner, thus allowing the production of bores that is accurate to within 1 &#x3bc;m. A pivoting device () for pivoting the electrode guide and an alignment device () for the parallel displacement of the electrode guide () are also provided, enabling the production of conical bores.

Electrode guide for spark-erosion machines and a method for the spark-erosion of workpieces

A piezoelectric assembly, a method for producing a structural unit with a prestressed piezoelectric actuator and a method for producing a hollow body for prestressing the piezoelectric actuator include an actuator pushed into a spring sleeve and force-lockingly and/or form-lockingly connected under prestress to two ends of the spring sleeve. This provides a structural unit in which the prestressing force of the piezoelectric actuator is permanently fixed by the production process.

Piezoelectric assembly

An actuator unit has an elastically configured hollow body in which a piezoelectric actuator is biased, the hollow body being provided with holes which are of a dumb-bell shape and run transversely of the hollow body's axis.

Piezoelectric actuator unit

A device for transmitting the deflection of an actuator ( ), comprising at least one transmission element ( ) that has a first, a second and a third support zone, said first support zone ( ) being associated with a counter-support, said second support zone ( ) being associated with the actuator, and said third support zone being associated with a control element ( ). The at least one transmission element rests on the counter-support with the first support zone under the action of the actuator and displaces the control element with the third support zone by way of a rotational movement about a center of rotation. The at least one transmission element is substantially configured as a plate ( ) that is disposed substantially perpendicular to the movement of adjustment and the first, the second and the third support zone are configured as substantially plane surfaces on the plate, further relates to a method for producing the inventive transmission element.

Device for transmitting an excursion of an actuator

The positioning of the actuating drive in a fuel injector with a piezoactor ( ) that is screwed into the housing ( ) of the fuel injector is performed by applying a voltage (U) to the piezoactor ( ) that corresponds to a given idle stroke (h), and the surface grinding of the housing ( ) and base plate ( ) of the piezoactor ( ) when voltage is applied. Between the housing ( ) of the fuel injector and the housing ( ) of the piezoactor ( ), there is also provided a compensation collar ( ) of a suitable thickness.

Method for positioning the actuating drive in a fuel injector device for implementing said method

A method for producing a structural unit with a prestressed piezoelectric actuator includes the steps of inserting a front end of the actuator into a hollow body, form-lockingly or force-lockingly connecting the inserted front end of the actuator to the hollow body, pressing the actuator into the hollow body with a defined force establishing a prestress of the actuator, and force-lockingly or form-lockingly connecting the actuator to the hollow body in the vicinity of a rear end of the actuator, for fixing the prestress of the actuator.

Method for producing a piezoelectric structural unit

A device for transferring a thrust, a fuel injection valve with such a device, and a method for manufacturing such a thrust transferring device. To transfer the thrust of an actuator, especially in an injection valve, mechanical tappets are used, which have substantially the shape of a cylinder whose defining surfaces are substantially triangular, with the corners rounded. By the great width of the tappet, broad contact areas are created so that friction during the transfer is reduced.

Thrust device, fuel injection valve having such a device, and method for manufacturing a thrust transfer element

Located between the frustoconical needle tip and the cylindrical needle shank of a nozzle needle of a fuel injection valve is a frustoconical needle portion, into which is introduced a peripheral groove. Through this kind of arrangement damping is capable of being set, depending on the position of the groove, during the axial movement of the nozzle needle.

Fuel injection valve for a combustion engine

The nozzle body ( ) of a fuel injection valve has a central bore ( ) in which a nozzle needle ( ) is guided. The tip ( ) of the nozzle body ( ) has a tapered valve seat ( ) which forms together with the sealing edge ( ) of the nozzle needle ( ) a valve ( ) which controls the flow of fuel to the injection holes ( ) in the nozzle tip ( ). Underneath the sealing edge ( ) a circumferential groove ( ) is disposed in the truncatoconical needle tip ( ) at the level of which the injection holes ( ) are disposed, so that when the valve ( ) opens the nozzle needle ( ) is axially stabilized and the shaping of the injected jet is improved.

Fuel injection valve for an internal combustion engine

A nozzle needle (,) of a fuel injection valve is guided axially in a nozzle body (,), and it points with its rear end face (,) into a compression chamber (,) and is operatively connected to a damping body (,). The recesses (,) of the damping body (,), together with the damping bore (,), form a fuel-filled damping chamber (,). Upon valve opening, the fuel in the compression chamber is compressed, and thus the valve opening is delayed. If the nozzle needle exceeds the damping stroke (hd), then the fuel is depressurized by a communication with an outflow chamber (,). The damping body is guided over at least part of its length in the damping bore.

Device for delaying the deflection of the nozzle needle of a fuel injection valve

A servo drive includes a piezoelectric actuator contained in a drive housing. The actuator has an actuator stack surrounded by a hollow cylindrical spring element and an actuator casing disposed in the spring element. The spring element is clamped, together with the actuator stack, between an actuator cap and an actuator base. An elastic compound fills gaps between the drive housing and the spring element as well as between the spring element and the actuator casing, and damps an actuator motion. A piezoelectric actuator for the servo drive and a method of producing the piezoelectric actuator are also provided.

Piezoelectric actuator for a servo drive, servo drive with a piezoelectric actuator and method of producing a piezoelectric actuator

An actuator is operatively connected to a closing member via a tappet. The closing member is introduced in a valve chamber and forms, with a conically tapering valve seat as part of a servovalve, a seal resistant to high pressure. The cross section of the closing member is configured to be mushroom-shaped, a closing head being in the form of a part-sphere and having a central flattening, with the result that the tappet has an enlarged bearing surface. A stem of the closing member is surrounded by a valve spring. The closing member is preferably shaped out of a solid sphere.

Growing community of inventors

Bamberg, Germany

Wilhelm Frank