Abstract: The invention relates to a method for determining correction information for an electric machine (7) which has a stator winding and a rotatably mounted rotor having multiple pole pairs, wherein a reference rotational angle (?Ref) of the rotor is selected; an actual variable influenced by a rotation of the rotor is determined and is monitored for interference waves (SW); when an interference wave (SW) is detected, an interference-wave correction instruction which is based on the reference rotational angle (?Ref) and is intended for compensating for the detected interference wave (SW), and a reference feature of the interference wave (SW) based on the reference rotational angle (?Ref) are determined; a reference rotational angle value of the reference rotational angle (?Ref) is determined on the basis of a rotational angle interval (??el) covered during an electrical revolution of the rotor; and the determined interference-wave correction instruction, the determined reference feature and the determined referenc

Abstract: The invention relates to a vehicle drive train and to a method for operating a drive train with an electromotive drive (4), wherein a rotational speed and a drive torque of the drive (4), which are convertible via a toothed transmission stage (12) for an output (19), and the drive (4) is controlled by means of a control signal (40), wherein the control signal (40) has superimposed thereon a periodic torque change signal (5), which is in phase with a tooth stiffness change of the toothed transmission stage (12), wherein a signal strength of the torque change signal (5) is lower with decreasing tooth stiffness than with increasing tooth stiffness.

Abstract: A method for determining a signal offset between a crankshaft angle signal and a combustion chamber pressure signal includes: measuring the combustion chamber pressure signal; shifting an alignment of the measured combustion chamber pressure signal with respect to the crankshaft angle signal by a plurality of respective offset angles to generate a plurality of offset combustion chamber pressure signals; reconstructing the offset combustion chamber pressure signals using a plurality of predetermined inherent pressure curves to generate reconstructed combustion chamber pressure signals; determining reconstruction errors of the reconstructed combustion chamber pressure signals as a function of differences between the offset combustion chamber pressure signals and the reconstructed combustion chamber pressure signals; and determining the signal offset between the crankshaft angle signal and the combustion chamber pressure signal as a one of the plurality of offset angles producing the reconstruction error having

Abstract: A method for operating an internal combustion engine in an idle mode, in which an ignition angle and/or an air quantity of the internal combustion engine is influenced and/or is modified as a function of an idle rotation speed of the internal combustion engine. The ignition angle and/or the air quantity and/or a fuel quantity for at least one combustion chamber of the internal combustion engine is modified as a function of at least one variable characterizing a combustion event in the combustion chamber.

Abstract: A power tool includes a sawing working device of an at least partially flat form and at least one actuator. The sawing working device is configured to produce a sawing cut in a working direction. The at least one actuator is configured to produce at least one oscillation in the sawing working device.

Abstract: A method for determining a signal offset between a crankshaft angle signal and a combustion chamber pressure signal in an internal combustion engine, in which an instantaneously measured combustion chamber pressure profile is compared to a calculated, modeled combustion chamber pressure profile.

Abstract: A method for operating an internal combustion engine in which a speed-based feature of the internal combustion engine, which is correlated with an indicated mean effective pressure of the fuel, is determined during the warm-up of the internal combustion engine and an ideal fuel quantity, which is to be injected into at least one combustion chamber of the internal combustion engine during the warm-up, is ascertained therefrom.

Abstract: A power tool includes a sawing working device of an at least partially flat form and at least one actuator. The sawing working device is configured to produce a sawing cut in a working direction. The at least one actuator is configured to produce at least one oscillation in the sawing working device.

Abstract: A method for operating an internal combustion engine in an idle mode, in which an ignition angle and/or an air quantity of the internal combustion engine is influenced and/or is modified as a function of an idle rotation speed of the internal combustion engine. The ignition angle and/or the air quantity and/or a fuel quantity for at least one combustion chamber of the internal combustion engine is modified as a function of at least one variable characterizing a combustion event in the combustion chamber.

Abstract: A method for operating an internal combustion engine in which a speed-based feature of the internal combustion engine, which is correlated with an indicated mean effective pressure of the fuel, is determined during the warm-up of the internal combustion engine and an ideal fuel quantity, which is to be injected into at least one combustion chamber of the internal combustion engine during the warm-up, is ascertained therefrom.