Electronic motor mount with magnetic decoupler

A hydraulic mount assembly providing variable damping characteristics, comprising:

• a pair of mounting members;
• a hollow body connected to said mounting members;
• a resilient diaphragm closing said hollow body forming therewith a closed cavity that is filled with liquid;
• partitioning means for partitioning said cavity into a primary chamber and a secondary chamber enclosed by said diaphragm;
• an elongated damping orifice extending about and through said partitioning means between said chambers so as to effect substantial restricted liquid flow between said chambers and thereby damping;
• a decoupler mounted for limited free floating reciprocal movement in a bypass orifice through said partitioning means between the primary and secondary chambers with a first seated position toward the primary chamber and a secondary seated position toward to secondary chamber to restrict and control liquid flow between said chambers in bypass relation to said damping orifice so as to effect damping control;
• sensing means for sensing vehicle operating conditions and resulting vibrations;
• external decoupler control force means for applying a variable force across the liquid in said secondary chamber and said diaphragm effective to induce said decoupler toward one of said seated positions whereby liquid flow around said decoupler is infinitely variable;
• and
• means for controlling the variable force in response to said sensing means for sensing vehicle operating conditions so as to allow the damping characteristics of said mount assembly to be tuned;
• said external decoupler control force means for applying a variable force including a variable voltage source responsive to said controlling means to produce a control voltage;
• and
• an electrical coil mounted exterior and adjacent to said diaphragm to produce a variable magnetic force in response to the control voltage;
• and
• said decoupler including magnetic material so as to be magnetically responsive across the liquid in said secondary chamber and said diaphragm to the variable magnetic force whereby the mount assembly damping characteristics are actively tuned,
• said diaphragm having a cavity in the exterior thereof with a bottom in close proximity to said decoupler,
• a core mounted in and extending beyond said coil into said diaphragm cavity to said bottom thereby to be located in close proximity to said decoupler.