Gm Global Technolgoy Operations, Inc.

Todd H Baldini

James P Hamberg

Richard Edward Longhouse

Stanley E Smith

John F Hoying

Michael Joseph Vendely

Wendell Collins, Jr

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/noise. 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.

Hydraulic mount with low amplitude, low-to-medium frequency vibration

A mounting system incorporating a hydraulic torque strut provides torsional damping and noise suppression of vehicle engine vibrations. The strut includes a first mount connected to the engine and a second mount connected to the frame of the vehicle. A rod rigidly connects the two mounts together. One or both of the mounts is a hydraulic mount. The hydraulic mount includes an elastomeric body that is connected to a mounting member and forms a cavity filled with damping liquid. An integral partition divides the cavity into two chambers. An orifice track in the partition provides fluid communication between the two chambers. Passage of damping liquid through the orifice track provides damping action. Further, in order to provide decoupling for vibration isolation and noise suppression, a spool-type decoupler is mounted for reciprocal movement in the opening in the partition.

Hydraulic torque strut with decoupling and related mounting system

A top mount assembly includes a resilient isolator designed to be seated on an upper end of an actuator. A guiding sleeve is seated on the isolator and includes an upstanding annular wall forming a cavity in an upper surface of the guiding sleeve. At least one Belleville spring is mounted in the cavity to permit deflection of the assembly during the operational range of the actuator. A thrust plate is mounted on the Belleville spring and attached to the body.

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Dayton, OH, United States of America

Todd H Baldini