Abstract: A device for influencing an exhaust gas flow, in particular for controlling sound emission in an exhaust branch of an engine, has a closure member that is driven by a motor in the exhaust pipe. The closure member produces pressure pulsations in the exhaust gas, so that a so-called “sound design” is possible. A force-transmitting, thermal decoupling member is integrated into a force transmission member located between the drive motor and the closure member to interrupt the heat transfer between the closure member and the drive motor.

Abstract: A device for influencing an exhaust gas flow, in particular for controlling the sound emission in an exhaust branch of an engine, includes a closure member that is movably arranged in the exhaust gas flow. For example, the closure member comprises a flap driven by a motor to move the closure member in the exhaust gas flow. It is thus optionally possible to produce or influence pressure pulsations in the exhaust gas which lead to an audible sound emission. The device according to the invention provides for a so-called “sound design” of a combustion engine. The driving device (the drive motor and a force transmission member to the closure member) is equipped with an active cooling system.

Abstract: A method and a device is used for reducing vibrations on at least two rotating elements, such as cooperating cylinders, which roll in opposite directions while situated in contact with each other. At least one of the elements has a surface protrusion that projects from an essentially circular contour of an active lateral surface. A height of this protrusion can be altered in a radial direction. A circumferential position of the protrusion can also be altered, all in accordance with a quality that characterizes a machine state or vibration.

Abstract: A method is used for reducing vibrations on at least two rotating elements, such as cooperating cylinders, which roll in opposite directions while situated in contact with each other. At least one of the elements has a surface protrusion that projects from an essentially circular contour of an active lateral surface. A height of this protrusion can be altered in a radial direction. A circumferential position of the protrusion can also be altered, all in accordance with a quality that characterizes a machine state or vibration.

Abstract: A motor vehicle, especially a convertible, includes a torsion stabilizer unit including a hydraulic actuator unit. The hydraulic actuator unit may be designed as a flexible hose actuator unit or tube actuator unit through which a hydraulic medium flows. The motor vehicle further includes a control unit to actively control the length of the hose actuator unit to counteract sensed torsion of the body of the motor vehicle.

Abstract: A motor vehicle, especially a convertible, includes a torsion stabilizer unit including a hydraulic actuator unit. The hydraulic actuator unit may be designed as a flexible hose actuator unit or tube actuator unit through which a hydraulic medium flows. The motor vehicle further includes a control unit to actively control the length of the hose actuator unit to counteract sensed torsion of the body of the motor vehicle.