Siemens Aktiengesellschaft

Siemens Automotive Corporation

Siemens Aktiengesell Schaft

Randolf Mock

Andreas Kappel

Hans Meixner

Bernhard Gottlieb

Bernhard Fischer

Günter Lugert

Carsten Schuh

Georg Bachmaier

Jens Dahl Jensen

Hellmut Freudenberg

Christoph Hamann

Heiner Bayer

Matthias Gerlich

Eric Chemisky

Gerit Ebelsberger

Enrico Ulivieri

Axel Ganster

Peter Kleinschmidt

Jörg Zapf

Erhard Magori

Jingming Jim Shen

Harry Schüle

Stefan Treinies

Reinhard Freitag

Klaus Van Der Linden

Martin Honsberg-Riedl

Hans Winter

Michael Höge

Oliver Hennig

Gerhard Mitic

Thomas Vontz

Olaf Haack

Oliver Henning

Edward-James Hayes

Thomas Vonz

Jakob Löschke

Andreas GÖDECKE

Christian Tump

An assembly for preloading a cable rotary-pendulum kinematic system is provided. The assembly includes a rotational body of a cable rotary-pendulum kinematic system. The rotational body is configured to rotate about the longitudinal axis thereof and is immovable in the direction of the longitudinal axis. The assembly further includes at least one gas spring surrounding the rotational body and which may be compressed in the direction of the longitudinal axis. The assembly further includes primary cables, which force-lockingly connect the rotational body to the gas spring in such a way that a rotational motion of the rotational body causes compression of the gas spring, whereby the assembly is preloaded.

Assembly having a gas spring for a cable rotary-pendulum kinematic system and use of the assembly for switching

A device for generating a flow of air, particularly for cooling electronic components, with an annular piezo element and an emitter element, wherein the annular piezo element can be vibrated radially by applying an alternating voltage, the emitter element is coupled radially to the annular piezo element, and wherein the radial vibration of the annular piezo element is configured so as to set the emitter element into axial vibration to generate the air flow which thereby permits a device of small dimensions for generating the an air flow to be created that is simultaneously characterized by low energy consumption and a long service life.

Device and arrangement for generating a flow of air

Methods and arrangements for determining the fineness of a ground material in a mill are provided, wherein the acoustic spectrum of the mill during the grinding process is used for concluding the fineness. The mill comprises a drum in which the ground material is present during the grinding process, said drum being driven by a magnetic drive having at least one magnetic segment during the grinding process, so that a rotating magnetic field generated with the aid of the magnetic drive causes the drum to rotate. In order to determine the acoustic spectrum, a voltage induced in a coil of the magnetic segment is determined at least intermittently. On the basis of a model, using the detected time-dependent induced voltage, conclusions can be drawn about the acoustic spectrum and therefrom about the fineness.

Determining the fineness of a ground material, in particular an ore, in a mill

In a method for the production of a gradient encapsulation layeron a piezoelectric actuator, based on this gradient encapsulation layer, the piezoelectric actuatordoes notrequire an additional housing-like enveloping structure in order to be protected externally. The gradient encapsulation layeris produced by cold gas spraying of particles having different material properties.

Piezoelectric actuator with encapsulation layer having a thickness-varying property gradient

A pressure regulator can be used particularly in a CNG-operated motor vehicle as an electronically controlled pressure reducer for maintaining the gas pressure constant on the injection valve used for filling the respective cylinder. The pressure regulator is composed of a control unit (), a pressure reducer () that is controlled by the control unit (), and a throttle () which connects the gas outlets () of the working chamber () of the control unit () and the pressure reducer (). A piezoelectric actuator () which affects the valve () of an overflow device () makes it possible to specifically modify the gas pressure (P) in the working chamber () of the control unit () and simultaneously influence the position of the valve () of the overflow device () of the pressure reducer (), thus allowing the output pressure (Pout) of the pressure reducer () to be adjusted to a predefined desired value.

Pressure regulator for gaseous media

In a method for producing a multilayer encapsulation () of a piezo actuator () such that the piezo actuator () is protected towards the outside without having to use an additional enveloping housing-type structure, in order to produce the multilayer encapsulation (), an electrically insulating elastic layer () is first applied to the surface of the piezo actuator (), whereupon a metallic layer is applied to the electrically insulating elastic layer () so as to planarly cover the same.

Piezo actuator comprising a multilayer encapsulation, and method for the production thereof

The invention relates to an injection valve which has a piezo actuator that is functionally connected to a nozzle needle by a hydraulic transmission device. The hydraulic transmission device is connected to a pressure reservoir by a sealing gap so that the pressure differences between the pressure reservoir and a hydraulic chamber of the hydraulic transmission device are compensated in the long term.

Metering valve with a hydraulic transmission element

A fluid dosing device for a pressurized liquid is disclosed, which comprises a chamber () which is supplied with pressurized liquid by means of a liquid supply line (); a valve needle () which is guided through the chamber (), the first end section of said valve needle being able to be lifted and the second end section thereof forming a valve in conjunction with a valve seat disposed on the housing (). Metal bellows () are provided as a leadthrough element for the first end section of the valve needle (). The metal bellows seal the chamber in said region in a tight manner. A throttle point () is provided between the valve needle () and the inner wall of the chamber between the metal bellows () and the mouth () of the liquid supply line () leading into the chamber.

Fluid dosing device with a throttle point

A metering device and method for delivering fluid that employs a compensating element. The metering device has a housing defining a fluid chamber that contains a pressurized fluid. The-housing further encloses an actuating drive, a valve needle and a compensating element. The housing terminates at a housing opening for delivery of fluid to the outside of the housing. Fluid is delivered from the housing by moving the actuating drive which in turn displaces the valve needle in an opening direction. Upon displacement of the valve needle, the valve needle moves axially in the opening direction with little, if any, lift loss due to the compensating element. The compensating element further acts to compensate for shifting or movement of metering components due to external factors, such as varying thermal loads, aging effects, and settling effects.

Metering device and method for delivering fluid employing a compensating element

For diagnosing coupled piezo-mechanical systems, methods are used which utilize electrical characteristic curves of the piezo-element that is contained in the piezo-mechanical systems. These electrical characteristic curves contain information about the mechanical condition of the overall piezo-mechanical system, which can be interpreted by suitable evaluating methods. It is thus possible to perform a diagnosis in which malfunctions and failures of the piezo-mechanical system can be detected (e.g. wear or failure of particular components). An important field of application is the diagnosis of fuel injectors which are controlled via piezo-actuators.

Method for evaluating characteristic values of piezo-mechanical systems

A wobble motor has at least one shaft guided in a rotatably and axially displaceable fashion, and at least one drive ring which surrounds the shaft and can be tilted with respect to a longitudinal axis of the shaft. The at least one guide ring can be displaced in a frictionally locked fashion and free from rotation.

Wobble motor

A stroke transmission apparatus includes a displaceable stroke element, a drive element and at least one lever, which is respectively seated on the drive element and can be applied to the stroke element and to a bearing, so that with a simultaneous seating of the lever on the stroke element, on the drive element and on the bearing, a primary stroke (xp) can be transmitted to the stroke element via a lever effect of the lever, and with a changing primary stroke (xp), a stroke factor (II) can be modified by modifying at least one contact point.

Method and apparatus for stroke transmission

A fluid metering device that employs a sealing element for delivering a metered dose of a pressurized fluid. The sealing element includes a metal bellows sealing element or metal bellows that attaches to a valve needle and a housing. The metal bellows includes a number of corrugated elements for sealingly guiding said valve needle as the valve needle moves to deliver the metered dose of pressurized fluid.

Fluid metering device

In a plate valve, particularly a cone spray valve, the valve gap, or respectively, seal gap (,) which is present in the open condition is not designed with parallel faces, but with cross-sectional areas which remain the same given increasing radius. This approach applies to a set from the interior outward. The advantage consists in the avoidance of cavitation and in the achievement of a low closing force for sealing the valve.

Plate valve for the dosing of liquids

The compensation element is compensating for temperature-conditioned length changes of an object. An injection valve that is fully functional in the entire range of the operating temperatures of a motor requires a device that compensates thermally conditioned length changes of the mechanical components (piezo-electric actuator, valve lifter, housing, etc.). This device should be capable of absorbing great forces and allow a stiff bearing of the actuator. The compensation element (3) has an oil-filled chamber (21) is composed of an actuator-side upper part (18), of a lower part (19) supported on a stiff bearing (valve housing 17), and of a structure (annular seal element 20) sealing the chamber (21) and yielding in an axial direction. Since the compensation element (3) is fitted into an annular holder (4) with little lateral play, every temperature-conditioned change of the oil or, respectively, chamber volume results in a displacement of the upper housing part (18) in an axial direction that is proportional to the volume change. As a result of a corresponding dimensioning of the chamber height, temperature-conditioned length changes of the valve housing (4) and of the piezo-electric actuator (2) can be compensated using the extremely compactly constructed and comparatively rigid compensation element (3).

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Hohenbrunn, Germany

Randolf Mock