Spring devices – Resilient shock or vibration absorber – Including energy absorbing means or feature
Patent
1992-06-15
1993-12-28
Oberleitner, Robert J.
Spring devices
Resilient shock or vibration absorber
Including energy absorbing means or feature
248562, 248636, F16M 500
Patent
active
052732622
ABSTRACT:
A hydraulic mount assembly includes a pair of mounting members connected together through a hollow elastomeric body. This hollow body is closed by a resilient diaphragm so as to form a cavity for a damping liquid. A partition divides the cavity into a primary chamber formed between the partition and the hollow body and a secondary chamber formed between the partition and the diaphragm. The partition also includes a primary (damping) track and a secondary (dynamic rate reducing) track providing fluid communication between the chambers. A decoupler is held for limited reciprocating movement in an annular groove in the secondary track. In operation, high amplitude vibratory inputs seat the decoupler forcing damping fluid to flow between the primary and secondary chambers through the damping track. The resulting high level of damping and high dynamic rate serve to suppress the vibrations and control engine movement
oise. In response to low amplitude and particularly low-to-medium frequency vibratory inputs, the decoupler remains unseated, allowing damping fluid to flow around the decoupler and through the secondary track. The resulting fluid inertial forces create a low dynamic rate and a soft mount for better vibration and noise isolation. At high frequency and low amplitude, such as during normal idle, the decoupler reciprocates normally, thus avoiding damping action.
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Baldini Todd H.
Hoying John F.
Vendely Michael J.
General Motors Corporation
Hinman Kevin M.
Muratori Alfred
Oberleitner Robert J.
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