Spring devices – Resilient shock or vibration absorber – Including energy absorbing means or feature
Patent
1990-03-15
1991-07-02
Halvosa, George E. A.
Spring devices
Resilient shock or vibration absorber
Including energy absorbing means or feature
180312, 248550, 248562, 248636, F16F 1503
Patent
active
050280392
ABSTRACT:
A vibration damping device disposed between a vibrating body such as an internal combustion engine and a base such as a vehicular chassis, comprises an accelerometer which is mounted on the vibrating body and detects an acceleration in the vertical direction of the vibrating body, and a control unit which controls the viscosity of rheopectic fluid within a flow restricting member disposed in the damping device in response to an acceleration signal from the accelerometer. The control unit operates in such a manner that, when the control unit receives an acceleration signal whose value is smaller than a preset value, voltage is applied to the electrodes disposed in the flow restricting member and as a result the dynamic damping effect is gained. Further the control unit operates in such a manner that, when the control unit receives a signal whose value is equal to or larger than the preset value, no voltage is applied to the electrodes and as a result the relationship between the damping force and the spring force is varied from a state in which they act in the same direction to one in which they act in opposite directions rapidly.
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patent: 3599428 (1971-08-01), Chaney
patent: 4671227 (1987-06-01), Hollerwerger
patent: 4685698 (1987-08-01), Klinkner
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patent: 4742998 (1988-05-01), Schubert
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patent: 4759534 (1988-07-01), Hartel
patent: 4773632 (1988-09-01), Hartel
patent: 4893800 (1990-01-01), Tabata
Halvosa George E. A.
Nissan Motor Company Ltd.
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