Spring devices – Resilient shock or vibration absorber – Including energy absorbing means or feature
Patent
1991-11-27
1993-08-17
Graham, Matthew C.
Spring devices
Resilient shock or vibration absorber
Including energy absorbing means or feature
26714012, B60K 512
Patent
active
052361829
ABSTRACT:
In order to attenuate vibration which tends to be transmitted from a power unit to a vehicle passenger during the idling mode of engine operation, ERF filled engine mounts are arranged so that when neither of two orifice passages are restricted by impressing a voltage on ERF viscosity control electrodes included therein, the frequency at which the dynamic spring constant exhibits a minimum value is the same as the frequency at which the vibration transmission phase maximizes while one of the two orifice passages is restricted by the application of a voltage on the set of electrodes disposed therein. Rapid cyclic control of the dynamic spring constant and the vibration transmission phase for each mount used to support a power unit is carried out. This enables a desirable compromise in the control of the two different parameters.
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Aoki Hirofumi
Doi Kazuhiro
Nakaji Yoshiharu
Sato Shigeki
Graham Matthew C.
Nissan Motor Co., Inc.
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