Method for controlling an engine support
AssigneeBayerische Motoren Werke Aktiengesellschaft
InventorsKarl Rotsch, Rainer Pollhammer, Norbert Peters, Felix Schramm, Thomas Kafer, Steffen Löschner, Horst Flechtner, Hans Heltmann, William Mark Horne
Life of this patent
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Abstract
Assembly mounts are stochastically or periodically detuned by changing their spring rate in order to prevent the transient effect of stuttering vibration of the drive assembly of a motor vehicle. The adjustment of the spring rate by at least a factor of 5 takes place for a time period which corresponds to no more than one fifth of the vibration duration of the stuttering movement.
Claims10
Process for controlling a mount of an assembly whose spring rate is tuned to the suppression of the vibrations generated by the assembly and including a device for changing the spring rate, said process comprising the steps of;
- changing said spring rate by at least a factor of five;
- and
- maintaining said changed rate during a time period that corresponds to no more than one fifth of a vibration duration (T0) of the natural vibration of the assembly in order to prevent the transient effect of a low-frequency natural vibration of the assembly.
Process for controlling a mount of an assembly whose spring rate is tuned to the suppression of the vibrations generated by the assembly and including a device for changing the spring rate, said process comprising the steps of;
- changing said spring rate periodically at a frequency of the natural vibration of the assembly;
- and
- maintaining said changed rate during a time period that corresponds to no more than one fifth of a vibration duration (T0) of the natural vibration of the assembly in order to prevent the transient effect of a low-frequency natural vibration of the assembly.
Dependencies are inferred from the claim text.