Gm Global Technolgoy Operations, Inc.

Daniel G Gannon

Sam M Jomaa

Wojciech E Suchta

Ping Lee

Craig W Lewitzke

Kenneth L Oblizajek

David J Verbrugge

Dennis J Kinchen

Derek K Hogland

A system and method using a mount assembly for attaching a powertrain to a structural member of a vehicle. The mount assembly includes a first compliant member, a second compliant member, a first fluid chamber, a second fluid chamber, a third fluid chamber, a pressure compliant membrane, and a valve. A fluid conduit interconnects the first fluid chamber with the second fluid chamber to allow a fluid to pass from the first fluid chamber to the second fluid chamber. The third fluid chamber has an opening in communication with the second fluid chamber and a vent port. The pressure compliant membrane seals the opening between the second fluid chamber and the third fluid chamber. The valve selectively seals the vent port in the third fluid chamber. A first stiffness profile of the mount assembly is selected by actuating the valve to open the vent port. A second stiffness profile of the mount assembly is selected by actuating the valve to close the vent port.

Mount assembly with electro-hydro-pneumatic switchable displacement elements

A vehicle powertrain mount includes a housing and first and second compliant members coupled to and cooperating with the housing. An inertia track assembly cooperates with the first compliant member to form a first fluid chamber and second fluid chamber with the second compliant member. The inertia track assembly includes at least first and second channels for conducting fluid between the first fluid chamber and the second fluid chamber. An air chamber in the inertia track assembly cooperates with a decoupler disposed therein. A switching apparatus is operatively connected to the housing and selectively positionable relative to the inertia track assembly. The switching apparatus includes an actuator with a plunger having a first portion positionable relative to the second channel and a second portion synchronously positionable relative to the air chamber.

Hydraulic powertrain mount with dual low frequency inertia tracks and decoupling membrane with synchronous switching mechanization

A vehicle engine mount system comprises a housing and an inertia track assembly that forms a first fluid chamber with an upper compliant member and a second fluid chamber with the second end of the housing. The inertia track assembly has first and second passageways therethrough for conducting fluid between the first and second fluid chambers. The first passageway has a substantially greater flow resistance than the second. First and second switches are coupled to the first and second passageways, respectively, for selectively enabling the first and second switches to control fluid displacement between the first fluid chamber and the second fluid chamber.

Multistate switchable engine mount and system

A hydraulic device disposed in a torque strut so as to provide a fully decoupled hydraulic torque strut. A main rubber element vibrates in response to powertrain pitch torque. At high vibration amplitude, high hydraulic damping is provided via a pumping chamber, an inertia track and a bellowed compensation chamber, wherein a decoupler system hydraulically connected to the pumping chamber is passively disabled. At low vibration amplitude, minimal hydraulic damping is provided via the decoupler system which is connected by a decoupler track to the compensation chamber.

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Milford, MI, United States of America

Daniel G Gannon