Abstract: In a method for controlling a drive motor of an actuator for actuating a valve, the power of the drive motor is supplied by pulse width modulated voltage controlled by a control frequency to adjust the actuator coupled to a valve into a desired position. The control frequency is changed such that a mixture of frequencies is produced. The control frequency is changed in steps. The frequencies of the mixture of frequencies are selected to be near the nominal control frequency. A drive motor of an actuator is provided that is controlled by the described method.

Abstract: In a method for controlling a drive motor of an actuator for actuating a valve, the power of the drive motor is supplied by pulse width modulated voltage controlled by a control frequency to adjust the actuator coupled to a valve into a desired position. The control frequency is changed such that a mixture of frequencies is produced. The control frequency is changed in steps. The frequencies of the mixture of frequencies are selected to be near the nominal control frequency. A drive motor of an actuator is provided that is controlled by the described method.

Abstract: An actuation device has a motor with a motor shaft and with at least one motor contact and/or sensor contact. A circuit board with at least one electronic circuit is provided. The motor is electrically connected by an electric connection to the circuit board. The motor contact and/or sensor contact is a press-fit contact pressed into at least one contact of the circuit board to produce the electric connection.

Abstract: A measuring device (2) draws out an aerosol air mixture from the working chamber (4) of the machine and feeds it to an optical sensor unit with an optical emitter (15) and an optical receiver (17). A compressed air jet pump (8) includes a compressed air feed (26), a compressed air nozzle (32), a preferably funnel-shaped pressure discharge channel and an underpressure region (10), with the compressed air nozzle (32) having an outlet direction oriented substantially in the direction of the pressure discharge channel. The compressed air feed (26) is connected to a compressed air source. A suction line is connected between the working chamber (4) and the underpressure region (10). The optical sensor unit has an optical passage between the optical emitter (15) and the optical receiver (17) oriented substantially perpendicular to the outlet direction of the compressed air nozzle (32) and leads through the underpressure region.

Abstract: In order to improve a system for monitoring the working chamber atmosphere of a machine, there is proposed a measuring device (2) with a suction means (8) that draws out an aerosol air mixture from the working chamber (4) of the machine and feeds the same to an optical sensor unit with at least an optical emitter (15) and at least an optical receiver (17). The optical sensor unit is operated by means of an electronic device. The suction means is configured as a compressed air jet pump (8) with a compressed air feed (26), a compressed air nozzle (32), a preferably funnel-shaped pressure discharge channel and an underpressure region (10), with the compressed air nozzle (32) having an outlet direction which is oriented substantially in the direction of the pressure discharge channel. The compressed air feed (26) can be connected to a compressed air source. A suction line that can be connected to the working chamber (4) of the machine is connected to the underpressure region (10).

Abstract: In order to improve a system for monitoring the working area atmosphere of an operating engine, measuring devices (2) for determining readings for a gas and/or an aerosol in the working area (4) of an operating engine are used as a starting point. Each measuring device comprises a suction means (8) which extracts a gas and/or a mixture of an aerosol from the working area (4) of the operating engine and feeds it to a sensor unit (16, 17, 18). An electronics module for operating the sensor unit (16, 17, 18) is also present. The suction means is designed as a convection pump (8) preferably with a heating device (42) and a cooling device (44).

Abstract: In order to improve a system for monitoring the working area atmosphere of an operating engine, measuring devices (2) for determining readings for a gas and/or an aerosol in the working area (4) of an operating engine are used as a starting point. Each measuring device comprises a suction means (8) which extracts a gas and/or a mixture of an aerosol from the working area (4) of the operating engine and feeds it to a sensor unit (16, 17, 18). An electronics module for operating the sensor unit (16, 17, 18) is also present. The suction means is designed as a convection pump (8) preferably with a heating device (42) and a cooling device (44).

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.