Hydraulic powertrain component mount with variable stiffness

A vehicle assembly, comprising:

• a structural component;
• a powertrain component;
• and
• a mount connected at a first connection point to the structural component and at a second connection point to the powertrain component, the mount including:
• a housing including the first connection point;
• a main rubber element having an outer armature, an inner armature including the second connection point, and an isolating element coupled to the outer armature and to the inner armature, the isolating element being formed of a material that is more flexible than the outer armature and the inner armature to permit relative movement between the outer armature and inner armature, wherein the main rubber element defines at least part of a fluid flow path having a first end and a second end;
• a hydraulic body connected to the housing and supporting the outer armature of the main rubber element, the hydraulic body defining part of the fluid flow path, the hydraulic body defining at least part of a fluid chamber that is communicated with the fluid flow path, the hydraulic body defining part of a control chamber communicated with the fluid flow path between the first end and the fluid chamber, and the hydraulic body having a port open to the control chamber;
• a membrane defining part of the control chamber and arranged between the port and the fluid flow path so that fluid in the fluid flow path does not flow through the port;
• and
• a valve having a valve head movable relative to the port between a first position closing the port and a second position spaced from the port.