Daimler Chrysler Ag

Daimler Ag

Daimlerchrylser Ag

Silvia Tomaschko

Juergen Schnur

Martin Hartweg

Martin Stroeer

Thomas Behr

J&uuml;rgen Schnur

Volker Lagemann

Klaus Geiger

Tobias Hanschke

Sebastian Schiefer

Udo Grimmer

Harald Scheib

Rolf-Dirc Roitzheim

Anja Keller

Ingo Borchers

Josef Michel

Ping Wang

Ruediger Schleicher

Oliver Essig

A cylinder housing for a reciprocating-piston internal combustion engine, in particular of a motor vehicle, includes a first cylinder which is delimited by a first cylinder barrel and a second cylinder which is delimited by a second cylinder barrel. The cylinders differ from one another with respect to their respective inner contour formed by the respective cylinder barrels.

Cylinder housing for a reciprocating-piston internal combustion engine

An engine block for an internal combustion engine of a motor vehicle has a cylinder within which a piston can be movably accommodated between a top dead center and a bottom dead center and has a cylinder bore, the internal cylinder diameter of which expands in the direction of the bottom dead center. The internal cylinder diameter expands only below the region in which a piston system change takes place during operation of the internal combustion engine. The internal cylinder diameter tapers from the top dead center to the region.

Engine block for an internal combustion engine of a motor vehicle and method of manufacturing an engine block for an internal combustion engine of a motor vehicle

In a component having vibration-damping properties, a mixture for manufacturing the component, and a method of manufacturing such a component, the component has granular and/or grain- and/or flake-shaped piezoelectric particles which are embedded in a polymer matrix in a proportion of at least 10 volume %. In order to improve the damping effect, at least some of the piezoelectric particles have a polarization which is different from zero.

Component having vibration-damping properties, mixture for manufacturing the component, and method of manufacturing such a component

The invention relates to methods and apparatuses for separating components adhesively bonded to one another wherein transmitters for mechanical vibrations, in particular for ultrasound, and/or for electromagnetic radiation, in particular laser light, are placed in the region of an adhesive join between the components. An adhesive bond in the adhesive join is acted upon by the vibrations or radiation, and the adhesive and optionally one of the components joined therewith are excited, as a result of which the adhesive effect of the adhesive bond is at least reduced. Alternatively or in addition thereto, transmitters can also be permanently placed in the region of the adhesive join at the time the components are adhesively bonded.

Methods and apparatuses for detaching components adhesively bonded to one another

A method and a device for influencing the transfer of vibrations of a vibration generator to an object connected to it, in particular of engine vibrations to the body of a motor vehicle. At least one piezo element is arranged as an actuator in the region of an intermediate element connecting the vibration generator to the object. Primary vibrations are transferred between the vibration generator and the object via the intermediate element. The actuator is induced in a controlled manner to undergo secondary vibrations. The total energy and/or the composition of the frequencies of the vibrations transferred via the intermediate element are changed by the actuator, and the remaining residual vibration is measured and used for controlling the secondary vibrations. Surprisingly good results are achieved in this way if the secondary vibrations are introduced in the region between the vibration generator and the intermediate element and if the residual vibration is measured in the region between the intermediate element and the point at which the intermediate element bears against the object.

Method and device for influencing the transfer of vibrations of a vibration generator to an object connected to it, in particular of engine vibrations to the body of a motor vehicle

A method and a system for influencing possible structure-borne sound conductions and possible noise radiations of objects which have at least two at least indirectly mutually adjoining and mutually connected components. A spacer body is arranged in the area of the at least indirect mutual adjoining &ldquo;contact area&rdquo;. As the result of the spacer body, which can be controllably influenced in its geometry, one of the two mutually connected components and the components which, with respect to the conduction of the structure-borne sound have different acoustic impedances can be excited in a simple manner to carry out vibrations.

Method and system for influencing possible structure-borne sound conductions and possible noise radiations of objects

A method and a shaft bearing for influencing machine background noise emitted by at least by one rotating part of the machine, especially for influencing the background noise within a passenger compartment of a motor vehicle. The amplitudes and/or the frequencies of primary vibrations which cause the background noise are preferably lessened and/or supplemented by controlled external interventions. The mounting conditions between the shaft bearing and a rotating part held in the machine shaft bearing, especially a shaft, is varied by a radial adjustment unit having piezo elements. The transfer function of the vibrations, especially the vibrations producing the sound waves, present between the rotating part and the shaft bearing or a component in contact with the shaft bearing, is varied.

Method and apparatus for influencing background noise of machines having rotating parts

The invention relates to a method for changing the clamping conditions of a rotatable part, which is rotatably disposed in the shaft bearing, and in the case of which the axis of rotation of the rotatable part is arranged axially identically with the axis of rotation of the shaft bearing. For changing a sound effect emanating from the rotatable part, the axial and radial clamping conditions between the shaft bearing and a rotatable part rotatably held in the shaft bearing, particularly of a shaft, of the engine, are changed in a controllable manner. Likewise, the transmission function of the vibrations, particularly of vibrations generating sound waves, existing between the rotatable part and the shaft bearing or a component contacting the shaft bearing is changed.

Method for changing the clamping conditions of a rotatable part as well as a rotatable part

A method and apparatus for detuning the natural frequency of a rotatable part, which is rotatably disposed in the shaft bearing, and in the case of which the axis of rotation of the rotatable part is arranged axially identically with the axis of rotation of the shaft bearing, as well as to a correspondingly tunable rotatable part. For compensating an axial play and/or a disturbing sound effect, the clamping conditions are changed by a reversible change of the axial course and/or of the axial contact pressure of an axial adjusting unit onto the rotatable part, the axial adjusting unit being manufactured of a piezoelectrically active material.

Method for detuning the natural frequency of a rotatable part as well as a tunable rotatable part

A method for changing the clamping conditions between a shaft bearing and a rotatable part, which is rotatably disposed in the shaft bearing, and in the case of which the axis of rotation of the rotatable part is arranged axially identically with the axis of rotation of the shaft bearing, as well as to a corresponding shaft bearing. The shaft bearing has a radial adjusting unit in which the clamping conditions of the rotatable part can be changed in the shaft bearing. This change takes place by a reversible change of the radial course of the radial adjusting unit and/or by a reversible change of the contact pressure onto the rotatable part.

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Ulm, Germany

Silvia Tomaschko