Method and device for reducing vehicle vibrations
AssigneeBayerische Motoren Werke Aktiengesellschaft
InventorsNorbert Deixler, Martin Waldmann
Life of this patent
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Abstract
A device for reducing a vibration of a vehicle component of a vehicle, the vehicle comprising at least one electric drive machine. The device is designed to determine vibration data relating to the vibration of the vehicle component and, based on the vibration data, to determine a compensation torque in order to reduce the vibration of the vehicle component. The device is also designed to cause the drive machine to provide a total torque which comprises a driving mode torque which is to be provided for the driving mode of the vehicle and which is overlaid with the compensation torque.
Claims7
A device for reducing a vibration of a vehicle component of a vehicle, wherein the vehicle comprises at least one electric drive machine, wherein the device is configured to:
- determine vibration data with respect to the vibration of the vehicle component, wherein the vibration data indicate an amplitude and a frequency of the vibration of the vehicle component, wherein the vehicle component comprises at least one of a body panel, a trim component, or a passenger compartment surface separate from a drivetrain of the vehicle;
- determine a compensation torque for reducing the vibration of the vehicle component on the basis of the vibration data, wherein one or more parameters of the compensation torque are determined as a function of the vibration data, wherein the one or more parameters comprise an amplitude and a frequency of the compensation torque;
- and,
- determine, on the basis of the vibration data, one or more actual values of the vibration of the vehicle component and compare them to one or more corresponding target values to determine a control error;
- and
- determine, on the basis of the control error, parameter values for the one or more parameters of the compensation torque by way of a controller;
- and,
- cause a total torque to be delivered by the drive machine, which comprises a driving operation torque to be delivered for driving operation of the vehicle, which is superimposed with the compensation torque,
- wherein the compensation torque oscillates at a frequency within a range of 10 to 60 Hz corresponding to a resonance frequency of the vehicle component, and
- wherein an amplitude and a frequency of the compensation torque are determined such that, due to an inertia of a torque transmission system between the drive machine and a wheel coupled to the drive machine, the compensation torque does not result in a variation of a driving speed of the vehicle.
A method for reducing a vibration of a vehicle component of a vehicle, wherein the vehicle comprises at least one electric drive machine, wherein the method comprises:
- determining vibration data with respect to the vibration of the vehicle component, wherein the vibration data indicate an amplitude and a frequency of the vibration of the vehicle component, wherein the vehicle component comprises at least one of a body panel, a trim component, or a passenger compartment surface separate from a drivetrain of the vehicle;
- determining, on the basis of the vibration data, a compensation torque for reducing the vibration of the vehicle component, wherein one or more parameters of the compensation torque are determined as a function of the vibration data, wherein the one or more parameters comprise an amplitude and a frequency of the compensation torque;
- determining, on the basis of the vibration data, one or more actual values of the vibration of the vehicle component and comparing them to one or more corresponding target values to determine a control error;
- determining, on the basis of the control error, parameter values for the one or more parameters of the compensation torque by way of a controller;
- and,
- causing a total torque to be delivered by the drive machine, which comprises a driving operation torque to be delivered for a driving operation of the vehicle, which is superimposed with the compensation torque,
- wherein the compensation torque oscillates at a frequency within a range of 10 to 60 Hz corresponding to a resonance frequency of the vehicle component, and
- wherein an amplitude and a frequency of the compensation torque are determined such that, due to an inertia of a torque transmission system between the drive machine and a wheel coupled to the drive machine, the compensation torque does not result in a variation of a driving speed of the vehicle.
Dependencies are inferred from the claim text.