Vibration isolator with electrorheological fluid controlled dyna

Details Vibration isolator with electrorheological fluid controlled dyna Vibration isolator with electrorheological fluid controlled dyna

1989-10-30

1991-07-09

Graham, Matthew C.

Spring devices

Resilient shock or vibration absorber

Including energy absorbing means or feature

267219, F16F 1300

Patent

active

050298232

ABSTRACT:
A vibration isolator including an electrorheological fluid filled partition assembly for providing variable dynamic stiffness characteristics. The partition assembly separates the variable volume fluid chambers of the isolator and includes movable electrode elements which define therebetween a chamber containing an electrorheological fluid. A fixed electrode is positioned between the movable electrode elements and separates the chamber into upper and lower portions. A plurality of openings extend through the fixed electrode allowing for passage of the electrorheological fluid between the portions in response to movement of the movable electrode elements. The yield stress developed in the electrorheological fluid by application of an electric field constrains movement of the movable electrode elements in response to input excitations thereby providing the isolator with a selectable dynamic stiffness.

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M. Bernuchon, A New Generation of Engine Mounts, SAE Technical Paper Series No. 840,259, Feb. 27-Mar. 2, 1984.
W. Flower, Understanding Hydraulic Mounts for Improved Vehicle Noise, Vibration and Ride Qualities, SAE Technical Paper Series No. 850,975, May 15-17, 1985.

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