An active damper is disclosed which includes: an elastic support body; a first wall section provided at the elastic support body and defines a first liquid chamber; a second wall section provided on an opposite side and defines a second liquid chamber; a partition wall section which separates the first liquid chamber from the second liquid chamber; an orifice in the partition wall section for communication between the first and second liquid chambers; and a damping unit to attenuate the vibrations transmitted from a vibrating source to the vibration-receiving part. The damping unit includes: a coil to generate a magnetic field according to a current supplied; magnetic members forming a closed magnetic circuit for the magnetic field; and a magneto-viscoelastic elastomer having a viscoelasticity changes depending on the magnetic field. At least one of the first and second wall sections, and the partition wall section has the damping unit.

An assembly for magnetically dynamic damping useful for isolating vibrational forces includes a housing wall bounding a main chamber therein. The assembly further includes a fixed magnetic source disposed in the main chamber. A diaphragm of elastic material is disposed in the assembly impermeably dividing the main chamber into sub-chambers. The diaphragm includes a magnetically actuated element adjacent to the fixed magnetic source. A source of electrical current energizes the magnetically actuated element, the fixed magnetic source, or both and either repels or pulls the magnetically actuated element with respect to the fixed magnetic source. A magnetic guide surrounds the fixed magnetic source and defines a gap exposing the fixed magnetic source to the magnetically actuated element. The magnetic guide routes the magnetic field towards the gap and prevents outward magnetic interference to the rest of the assembly.

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.

A hydromount for mounting a motor vehicle unit is disclosed. The hydromount includes a supporting spring supporting a mount core and surrounding a working chamber, and a compensation chamber separated from the working chamber by a dividing wall and delimited by a compensation diaphragm. In embodiments, the compensation chamber and the working chamber are filled with a liquid and are connected by a damping duct incorporated into the dividing wall. In an embodiment, the dividing wall has two dividing plates between which a diaphragm is accommodated in a manner capable of oscillating. In an embodiment, the diaphragm and the dividing wall delimit an air chamber connected to the environment via an opening in the dividing wall, and the opening can be unblocked and closed by a switchable non-return device having a pressure-actuatable non-return valve with an opening pressure set to or having an oscillation amplitude of the diaphragm.

An active damper is disclosed which includes: an elastic support body; a first wall section provided at the elastic support body and defines a first liquid chamber; a second wall section provided on an opposite side and defines a second liquid chamber; a partition wall section which separates the first liquid chamber from the second liquid chamber; an orifice in the partition wall section for communication between the first and second liquid chambers; and a damping unit to attenuate the vibrations transmitted from a vibrating source to the vibration-receiving part. The damping unit includes: a coil to generate a magnetic field according to a current supplied; magnetic members forming a closed magnetic circuit for the magnetic field; and a magneto-viscoelastic elastomer having a viscoelasticity changes depending on the magnetic field. At least one of the first and second wall sections, and the partition wall section has the damping unit.

An assembly for magnetically dynamic damping useful for isolating vibrational forces includes a housing wall bounding a main chamber therein. The assembly further includes a fixed magnetic source disposed in the main chamber. A diaphragm of elastic material is disposed in the assembly impermeably dividing the main chamber into sub-chambers. The diaphragm includes a magnetically actuated element adjacent to the fixed magnetic source. A source of electrical current energizes the magnetically actuated element, the fixed magnetic source, or both and either repels or pulls the magnetically actuated element with respect to the fixed magnetic source. A magnetic guide surrounds the fixed magnetic source and defines a gap exposing the fixed magnetic source to the magnetically actuated element. The magnetic guide routes the magnetic field towards the gap and prevents outward magnetic interference to the rest of the assembly.

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.

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.

An active mount in which a nozzle plate is mounted between an insulator and a diaphragm to divide an inner space into an upper liquid chamber and a lower liquid chamber, and an encapsulated hydraulic liquid flows from the nozzle plate through a first flow path depending on a change in fastened state of the liquid chambers may include the nozzle plate having a second flow path and allowing the upper liquid chamber and the lower liquid chamber to be in communication with each other, the diaphragm made of a material having elasticity and coupled to a lower portion of the nozzle plate to form the lower liquid chamber, the diaphragm having an inflection portion, and a yoke including a body portion having an upper end in close contact with a lower portion of the inflection portion, and a rod portion coupled to a lower portion of the body portion.

The invention relates to an electromagnetic linear actuator (16) with a stator (18) and an armature (20) which can be moved relative to the stator (18). The stator (18) has at least one permanent magnet (22) and at least one coil (24), the stator (18) has a conductive element (26) made of a ferromagnetic material, the conductive element (26) extends over the at least one permanent magnet (22) and/or the at least one coil (26), and the armature (18) forms a yoke (34) made of a ferromagnetic material in the longitudinal direction L for the conductive element (26). The invention further relates to a hydraulic bearing (2) with a support spring (36), a working chamber (4), which is filled with a hydraulic fluid, a compensating chamber (6), a partition (8) which is arranged between the working chamber (4) and the compensating chamber (6), a throttle channel (10) which is formed between the working chamber (4) and the compensating chamber (6) for exchanging hydraulic fluid, and a control membrane (12) which is paired with the partition (8) and which is designed to change a working chamber volume (14) of the working chamber (4). The hydraulic bearing (2) has an electromagnetic linear actuator (16) according to the invention, and the armature (20) is mechanically connected to the control membrane (12). The invention additionally relates to a motor vehicle with such a hydraulic bearing (2).