Electronically controlled mounting structure for mounting power unit on vehicle

An electrically controlled mounting system including a mounting structure disposed between a body and a power unit of a vehicle for mounting of said power unit on said body, so as to effect vibration damping and isolation, comprising:

• a housing assembly;
• an elastic body supported by said housing assembly and connected to one of said body and said power unit of the vehicle, said elastic body cooperating with said housing assembly to partially define a pressure-receiving chamber filled with an incompressible fluid which cooperates with said elastic member to receive vibrations to be damped or isolated;
• an elastic diaphragm member supported by said housing assembly and partialy defining an equilibrium chamber which is filled said incompressible fluid, and which communicates with said pressure-receiving chamber through a passage means, said elastic diaphragm member being elastically yieldable, so as to permit a change in a volume of said equilibrium chamber and thereby permit a change in a volume of said pressure-receiving chamber;
• a movable member disposed between said pressure-receiving chamber and said equilibrium chamber, so that said movable member is movable over a predetermined maximum distance in opposite directions toward and away from said elastic body and said elastic diaphragm member;
• elastic holder means supported by said housing assembly and comprising a pair of generally planar elastic members fixed to opposite ends of said movable member, for flexibly supporting said movable member so as to permit said movable member to be moved in said opposite directions;
• drive means disposed within said housing assembly, between said pressure-receiving and equilibrium chambers, for reciprocating said movable member in said opposite directions;
• guide means for guiding said movable member in said opposite directions in a sliding contact manner;
• and
• a control device connected to said drive means, for controlling said drive means so as to reciprocate said movable member over a controlled operating stroke and at a controlled frequency, said controlled operating stroke being determined by an elasticity of said elastic holder means and a drive force produced by said drive means.