Method for vibration damping of a drive train by means of an electric machine
AssigneeSchaeffler Technologies AG & Co. KG
InventorSimon Schwunk
Life of this patent
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Abstract
A method for vibration dampening of a drive train is disclosed. The method includes determining torsional parameters of the drive train via a state controller based on reconstructed torsional parameters of the at least one flywheel mass detected by at least one observer, determining the reconstructed torsional parameters based on disturbances in both (i) a load torque (Mlast) applied at an output of a torque transmission device and (ii) an induced torque (Mind) transmitted via the torque transmission device, determining a compensation torque via the state controller based on the reconstructed torsional parameters, and controlling an electric machine via the state controller based on the compensation torque to compensate torsional vibrations.
Claims10
A method for vibration damping a drive train including an internal combustion engine, the method comprising:
- providing a state controller, at least one observer, and a torque transmission device arranged between a crankshaft and a transmission input shaft, the torque transmission device including at least one flywheel mass having a predetermined moment of inertia,
- determining torsional parameters of the drive train based on reconstructed torsional parameters of the at least one flywheel mass detected by the at least one observer,
- determining the reconstructed torsional parameters based on disturbances in both (i) a load torque (Mlast) applied at an output of the torque transmission device and (ii) an induced torque (Mind) transmitted via the torque transmission device,
- determining a compensation torque based on the reconstructed torsional parameters, and
- controlling an electric machine via the state controller based on the compensation torque to compensate torsional vibrations.
A method for damping vibrations in a drive train comprising:
- providing:
- an electric machine;
- a torque transmission device comprising a flywheel mass with a moment of inertia;
- a state controller for controlling the electric machine to provide a compensation torque to compensate torsional vibrations;
- and,
- an observer for detecting a rotational velocity or a rotational angle of the drive train;
- arranging the torque transmission device between an input shaft of a transmission and a crankshaft of an internal combustion engine;
- reconstructing torsional parameters of the flywheel mass using:
- the rotational velocity or the rotational angle;
- a load torque at an output of the torque transmission device estimated by the observer;
- and,
- an induced torque from the internal combustion engine transmitted via the torque transmission device;
- and,
- using the torsional parameters as input parameters of the state controller.
Dependencies are inferred from the claim text.