Hydraulic mount with magnetorheological fluid

A hydraulic mount for supporting a component of an automotive vehicle, said mount comprising:

• an elastomer body member;
• a base member;
• a partition interposed said body member and said base member;
• a fluid pumping chamber between said body member and said partition;
• a reservoir between said base member and said partition;
• a decoupler member supported by said partition and in fluid flow communication with at least one of said pumping chamber and said reservoir;
• annular passage means formed in said partition and communicating a hydraulic fluid between said pumping chamber and said reservoir, said hydraulic fluid being responsive to a magnetic field to modify its shear properties;
• and
• an electromagnetic coil supported on said partition radially outwardly of said passage means with respect to a central axis of said mount and operable to generate a magnetic field intersecting said passage means to selectively modify the shear properties of said hydraulic fluid and to control fluid flow between said pumping chamber and said reservoir to modify the damping characteristics of said mount.