A heat exchanger for a vehicle is disposed in a fluid circuit in which a fluid is circulated according to an operating condition of the vehicle. The heat exchanger includes a tank and a pressure adjuster. The tank defines a tank chamber therein and is configured to allow the fluid to flow through the tank chamber. The pressure adjuster is disposed inside the tank and defines a damper chamber separately from the tank chamber. The pressure adjuster is configured to be displaceable or deformable to expand and reduce the damper chamber. The damper chamber is filled with a compressible gas. The pressure adjuster is configured to reduce the damper chamber in response to an increase in a pressure of the fluid in the tank chamber. The pressure adjuster is configured to expand the damper chamber in response to a decrease in a pressure of the fluid in the tank chamber.

A computer of an active vibration damping device calculates operation command values for an actuator from rotation information of a drive source, and corrects the operation command values in accordance with an internal temperature of the actuator. The computer applies a drive voltage to the actuator using a voltage duty ratio based on the corrected operation command values. The computer also estimates the internal temperature on the basis of an average duty ratio as an average of the voltage duty ratios in a predetermined interval.

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 hydraulic bearing has a cylindrical main housing, a load-bearing spring enclosed by the main housing, a work chamber, which is at least partially enclosed by the load-bearing spring, with a work chamber volume filled with hydraulic fluid. The hydraulic bearing further includes a control diaphragm, which is configured to change the work chamber volume, and an actuator. The actuator is coupled to the control diaphragm for deflecting the same. The hydraulic bearing also includes an equalization chamber and a throttle duct hydraulically interconnecting the work chamber and the equalization chamber, and a cylindrical chamber housing is arranged with a first end face on an outer casing side section of the main housing, wherein the equalization chamber is formed by at least a part of an interior of the chamber housing.

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.

Antivibration device comprising two frames and an elastomer body interconnecting said frames and delimiting a first hydraulic chamber linked to a second deformable hydraulic chamber via a throttle passage. A microturbine is rotatably mounted in the throttle passage and is coupled to a generator. The microturbine is configured to be always driven in the same rotational direction by the fluid when the fluid reciprocates along opposing first and second paths within the throttle passage.

A vibration-damping electromagnetic actuator including: a tubular stator including at least one coil member having a coil and an outer yoke attached to the coil; a mover including a permanent magnet and at least one inner yoke superposed in an axial direction of the stator, the mover being inserted into the tubular stator as axially displaceable relative to the stator through energization to the coil; and an inner tubular part provided at the outer yoke being superposed on an inner peripheral face of the coil to have a magnetic gap, wherein the at least one inner yoke has a thick part at an outer peripheral part thereof, and a lightening part at an inner peripheral part thereof so that an axial dimension of the inner yoke is smaller in a formation part of the lightening part than in the thick part.

Vibration damping device comprising two armatures and an elastomer body that connects armatures together and which delimits a first hydraulic chamber that communicates with a second hydraulic chamber that can be deformed by a constricted passage. A sealed box, integral with the second armature, contains a control device and an actuator. The box is sealed and comprises at least one flexible wall separating from the atmosphere, the interior space of the box.

Vibration damping device comprising two frames and an elastomer body that connects frames together and which delimits a first hydraulic chamber that communicates with a second hydraulic chamber that can be deformed by a constricted passage. An electromagnetic actuator, that controls the vibration damping behavior of the device, comprises a a permanent magnet holding machanism.

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.