Importance

Loading Importance Indicators...

Abstract

A method of smart damping resonance torsional vibrations in a member capable of transmitting torque, such as a pulse driven rotating shaft. The damping system damps resonance torsional vibrations in the driven shaft by automatically imparting periodic torsional impulses in the opposite direction to the twisting motion from the torsional vibration. The periodic torsional impulses are of sufficient energy to effect damping in the driven shaft. In one specific vehicle driveline embodiment, a housing is attached to one end of the crank shaft of an internal combustion engine. The housing contains a high speed damper flywheel and an eddy current brake attached to the shaft with the ability to apply torsional impulses to the damper flywheel. The eddy current brake is controlled by a computer that continuously receives rotation rate information and torsional vibration amplitude signals from sensors mounted on the crank shaft. The computer calculates the appropriate torsional impulse magnitude and timing to apply at the damper location and then commands the eddy current brake accordingly.

Loading the Abstract Image...

First Claim