Hydraulic powertrain component mount with variable stiffness

A powertrain component mount assembly, including:

• a housing;
• a main rubber element having an outer armature, an inner armature 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 inner armature and the outer 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, 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;
• 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, wherein the control chamber is spaced from the fluid chamber, and the membrane is solid and without any openings through the membrane;
• and
• a cover received between the outer armature and the hydraulic body, wherein the fluid flow path is defined at least in part by a groove formed in the hydraulic body, and the cover overlaps the groove, the groove and cover define a convoluted, serpentine or spiral flow path, and the cover includes a first opening that communicates with the groove and another fluid chamber defined at least in part by the plate and the outer armature.

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 having a first face adjacent to the outer armature of the main rubber element and an outer face opposite to the first face, the hydraulic body defining part of the fluid flow path, the hydraulic body having a first cavity that extends into the hydraulic body from the outer face that defines at least part of a fluid chamber that is communicated with the fluid flow path, the hydraulic body having a second void formed in the first face and defining part of a control chamber, and the hydraulic body having a port open to the control chamber, and the hydraulic body having a valve cavity that extends into the hydraulic body from the outer face and that is open to the port, spaced from and separate from the first cavity;
• 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.