Abstract: A hydromount comprising a carrying mount and a support mount connected to each other by an elastomeric suspension spring. The hydromount includes a working chamber and a compensation chamber that are filled with a fluid and separated by a partition, and connected to each other via a damping channel inserted into the partition. The hydromount includes an absorber channel that is switchable via an actuating device. The absorber channel is inactive in a first switching position of the actuating device and active in a second switching position of the actuating device. The actuating device has an electrically drivable electromagnet and an armature suspended via an elastic membrane so as to allow the armature to vibrate. The membrane is surrounded by a limiting member such that the membrane abuts against the limiting member in the first switching position and is spaced from the limiting member in the second switching position.

Abstract: Embodiments of isolators including magnetically-assisted thermal compensation devices are provided, as are embodiments of magnetically-assisted thermal compensation devices. In one embodiment, the isolator includes a damper assembly and a magnetically-assisted thermal compensator (“TC”). The magnetically-assisted TC includes, in turn, a TC chamber fluidly coupled to the damper assembly and configured to exchange damping fluid therewith. A TC piston is slidably disposed within the TC chamber and exposed to damping fluid when the TC chamber is filled therewith. A TC bellows is sealingly coupled to the TC piston and exerts a resilient bias force thereon. A magnetic preload system is further coupled to the TC piston and exerts a magnetic bias force thereon, which combines with the resilient bias force provided by the TC bellows to impart the magnetically-assisted TC with a predetermined pressure profile over the operative temperature range of the isolator.

Abstract: In one embodiment a locking mechanism for a hinge, comprises a housing defining a chamber which is to contain a magnetorheological (MR) fluid, a bias mechanism which disposed at a first end of the chamber, a piston disposed at a second end of the chamber, the piston to be coupled to a hinge rotatable about a first axis, wherein rotation of the hinge about the first axis translates the piston laterally in the housing on a first side of the chamber, and a magnet positioned proximate the housing to change the MR fluid from a first state in which the MR fluid exhibits a low viscosity to a second state in which the MR exhibits a high viscosity. Other embodiments may be described.

Abstract: A fluid-filled type vibration damping device having a first and a second fluid chamber respectively filled with non-compressible fluid and which experience relative pressure fluctuations during vibration input, and provided with an orifice passage through which the first fluid chamber and the second fluid chamber communicate with one another, while being capable of exhibiting better dependability and durability in terms of effective vibration damping action of several types of vibration with different frequencies. In the device, tuning frequency of the orifice passage is varied by varying a passage length of the orifice passage 68 through adjustment of an insertion distance of an inside orifice member into an outside orifice member.

Abstract: A water-level/vibration detection apparatus includes a diaphragm adapted to be moved by air pressure applied through an air hose and a core slidably placed on a support shaft of the diaphragm while being elastically supported by an elastic member. The water-level/vibration detection apparatus detects the level of water and vibration via movement of the core into a coil which constitutes a resonance circuit.

Abstract: To provide a vibration isolation unit capable of reducing the number of parts, man-hour and material cost, and suppressing the product cost. One side of a stopper rubber member continues to the outer edge of a diaphragm. Accordingly, because they can be vulcanizingly molded simultaneously, the number of parts can be reduced. Also, because the diaphragm is attached to an outer tube member, the stopper rubber member also can be fixed simultaneously, and therefore the man-hour can be reduced. Further, because one side of the stopper rubber member continues to the outer edge of the diaphragm, overlapping of them in an axial view can be avoided, and a rubber material can be used efficiently. Thus, the number of parts, man-hour and material cost can be reduced and the product cost of the overall vibration isolation unit can be suppressed.

Abstract: A magnetorheological fluid-based hydraulic mount apparatus (20, 220) for supporting a vibration source on a base is disclosed. A main fluid passage (104, 304) extends between pumping chamber (64, 264) and receiving chamber (66, 266) for passing the fluid therebetween. Electromagnet coil (98, 298) variably generates a magnetic flux across the main fluid passage to variably change the damping stiffness of the mount. A rate dip track passage (120, 320) extends between the pumping chamber (64, 264) and receiving chamber (66, 266) for oscillating the magnetorheological fluid (68, 268) therethrough to decrease the dynamic stiffness of the mount apparatus (20, 220) at predetermined frequencies.

Abstract: An electronic active mount capable of a bidirectional control includes a core positioned inside a housing and connected to an engine. A main rubber is configured to connect the core and the housing. An upper orifice is coupled to an end of the main rubber to form an upper fluid chamber. A membrane is coupled to be moved up and down is connected to a lower orifice. A lower housing is formed at a central portion of the lower orifice, and a diaphragm is spaced apart from the lower orifice at a predetermined distance, which may attenuate vibration by using two electromagnets provided in an electronic mount.

Abstract: An active mount structure may include an actuator coupled to an actuator plate coupled to an orifice plate within a housing, wherein the actuator includes a plunger coupled to the actuator plate, a first rod rotatably coupled to a bottom of the plunger and rotated by a first motor unit, wherein the first rod includes a rotating shaft rotatably coupled to the plunger, one side of the rotating shaft extending to form an extending portion, and a rotation retention portion formed at the extending portion, a swash plate defining a center hole therein and having shaft protrusions, wherein the first rod may be disposed in the center hole and the rotation retention portion may be engaged to the swash plate, and a second rod engaged at the swash plate and raised or lowered by a second motor unit, wherein the shaft protrusions may be rotatably coupled to the housing.

Abstract: A switchable, hydraulic damping mount includes a work chamber filled with hydraulic fluid and a compensation chamber connected to the work chamber via a channel. A partition wall mutually separates the chambers. A ferromagnetic diaphragm is arranged in the partition wall and is deflectable. An electromagnetic switching actuator has a deenergized state and an energized state and controls the diaphragm. The switching actuator applies a magnetic holding force to the diaphragm and fixes the diaphragm in a rest position when the switching actuator is in the deenergized state and reduces the magnetic holding force to such an extent that the diaphragm is enabled for movement in the longitudinal direction of the mount when the switching actuator is in the energized state.

Abstract: Disclosed herein is an active mount including a housing surrounding components within the active mount and providing and outer surface, and a core disposed at an inside upper portion of the housing inside having an upper portion protruding outward from the housing. Additionally, an insulator is connected to a lower portion of the core and extends radially outward. An actuating mechanism is disposed at a predetermined distance from a lower portion of the insulator and includes a vertically movable center. A driving unit is disposed horizontally outside of the actuating mechanism and is configured to apply a force for vertically moving the center of the actuating mechanism.

Abstract: A control device of a motor vehicle, which control device receives, from at least one body-side sensor, a vibration actual value of at least one corresponding body-side reference point and receives, from at least one chassis-side sensor, a vibration actual value of at least one corresponding chassis-side reference point, the control device making a decision on the reference point or points for which actuating signals for the actuators of the active assembly bearings are generated, and on which vibration desired value is used, in such a manner that the respective vibration actual value follows the respective vibration desired value.

Abstract: A two vacuum actuated switch mechanism is provided within an engine or hydromount. First and second ports are provided along a peripheral portion of an inertia track assembly. A decoupler or vacuum diaphragm is selectively exposed to vacuum through a first port. Under the influence of the vacuum, the decoupler can no longer oscillate. If vacuum is applied only to the decoupler, and not and idle diaphragm, the fluid is forced through a low frequency inertia track which creates high levels of damping and low frequencies. If vacuum is also applied to the decoupler and the idle diaphragm, the high frequency inertia track is opened and causes the fluid to flow therethrough. This creates a high frequency dynamic rate dip. Alternatively, if no vacuum is applied to either the decoupler or the idle diaphragm, the decoupler is allowed to freely oscillate creating a decoupled state for low input displacements. Higher input displacements results in fluids being forced through the low frequency inertia track.

Abstract: A spring-damper system for use in bearings or as a damper, in particular as a spring-damper system in active engine bearings includes a coupling device which can be coupled to a load and to a supporting device at a bearing or damping point, in order to mount the load in such a way that it can vibrate on the supporting device. The coupling device is designed to transmit a load input generated by the load substantially without loss to a spring-damper device and to absorb a reaction thereto by the spring-damper device and to feed said reaction back to the load, in order to counteract the load input in a vibration-damping fashion. In this context, the spring-damper device can be arranged and/or is arranged spatially separate from the bearing or damping point.

Abstract: An active damping system for use in connection with a vibration isolation system includes an intermediate mass between a base and an isolated payload. The intermediate mass is supported by at least one support element which also supports at least substantially all of the static forces of the isolated payload. An actuator dampens and isolates dynamic forces acting on the intermediate mass from the isolated payload. The active damping system also includes a payload support element and a passive damping element, both of which are coupled at one end to the payload platform and at an opposite end to the intermediate mass. A sensor is affixed to the intermediate mass to generate a feedback signal to a processor coupled to the actuator.

Abstract: In an embodiment, and by way of example only, a vibration isolator is used for coupling between a payload and a base and includes a rod, a magnetic damper, a first spring, and a second spring. The magnetic damper includes a movable section and stationary section. The movable section comprises a conductive material and has an opening through which the rod extends. The stationary section includes a magnet disposed around and spaced apart from the movable section and is coupled to the base. The first spring couples the movable section to the rod. The second spring is coupled to the rod and stationary section. In another embodiment, the vibration isolator also includes a voice coil actuation system.

Abstract: A hydromount comprising a carrying mount and a support mount connected to each other by an elastomeric suspension spring. The hydromount includes a working chamber and a compensation chamber that are filled with a fluid and separated by a partition, and connected to each other via a damping channel inserted into the partition. The hydromount includes an absorber channel that is switchable via an actuating device. The absorber channel is inactive in a first switching position of the actuating device and active in a second switching position of the actuating device. The actuating device has an electrically drivable electromagnet and an armature suspended via an elastic membrane so as to allow the armature to vibrate. The membrane is surrounded by a limiting member such that the membrane abuts against the limiting member in the first switching position and is spaced from the limiting member in the second switching position.

Abstract: A fluid-filled type vibration damping device including a base component and a tubular mating component. The tubular mating component is externally fitted onto the base component by means of a diameter-constricting caulking with a sealing rubber clasped therebetween so as to constitute a mate-fastened portion. The tubular mating component extends axially outward beyond a sealed section of the mate-fastened portion so as to provide a caulking tube portion. A diametrical position of the tubular mating component at the sealed section is determined by contact of the caulking tube portion against an outside peripheral face of a positioning projection provided on the base component so as to define a diametrical positioning portion. The caulking tube portion is constricted in diameter and held in engagement with an axial edge portion of the positioning projection so as to form an axial positioning portion.

Abstract: An active antivibration device which includes a main body, a mobile element which is elastically supported inside the main body and movable in an axial direction of the main body, and a coil which is disposed inside the main body and fixed to the main body. The mobile element includes a mobile axis body supported in the axial direction of the main body, and a first yoke, a permanent magnet and a second yoke which are held by the mobile axis body and disposed successively along an axial direction of the mobile axis body. The permanent magnet is magnetized in the axial direction of the mobile axis body and disposed between the first yoke and the second yoke.

Abstract: Disclosed is a parallel type engine mount structure that includes a main rubber member having a core disposed at an upper portion thereof and a fluid chamber disposed at a lower portion thereof. A bracket is disposed at an exterior of the main rubber member and a membrane is mounted at a lower portion of the fluid chamber. Additionally, a first space is disposed at a lower portion of the membrane on which one end of a first leaf spring is mounted. An orifice is disposed at an exterior side of the first space and includes an upper liquid chamber formed between the main rubber member and the membrane and a lower liquid chamber. A driver is disposed at an exterior side of the bracket and includes a second space formed at a lower portion thereof and a second leaf spring connected to the first leaf spring.

Abstract: The present invention provides an anti-vibration apparatus including an anti-vibration base, a plurality of supporting mechanisms configured to support the anti-vibration base, a plurality of actuators configured to apply a force to the anti-vibration base, an obtaining unit configured to obtain vibration data which represents vibrations on the anti-vibration base, a first calculation unit configured to calculate, based on the vibration data obtained by the obtaining unit, a force to be applied to the anti-vibration base so as to reduce the vibrations on the anti-vibration base, and a distribution unit configured to distribute the force calculated by the first calculation unit to forces to be applied by the plurality of actuators to the anti-vibration base.

Abstract: A vibration generating apparatus with high yield, low cost, and can exhibit vibration tactile haptic effects even with variation in the natural frequency of a mechanical vibrator, including a damping system having a damping ratio ?<1 to support a mechanical vibrator to a fastening part, and a magnetizing unit generating a dynamic magnetic field to vibrate the mechanical vibrator by non-contact, the mechanical vibrator generating a beat vibration by making the frequency of a drive voltage applied to the magnetizing unit, from a drive start or middle of drive, to be a non-resonant frequency out of a damped natural frequency of the mechanical vibrator, wherein the apparatus comprises a forced vibration control unit controlling to stop application of the drive voltage, in a beat wave defining an amplitude of the beat vibration, at a second valley part after a first peak part from the side of the drive start.

Abstract: Actuator arrangement with an actuator (8), a reference mass (22), a spring (24) and a first sensor (26; 42, 43; 32, 36). The actuator (8) applies a force between a first object (2) relative to a second object (16; 54). The reference mass (22) is, in use, supported by a third object (16; 56) by means of the spring (24). The first sensor (26; 42, 43; 32, 36) generates a first distance signal that depends on a first distance (z2; z5,z6; z3,z4) between the reference mass (22) and the first object (2) and is provided to a controller (6) to actuate the actuator (8).

Abstract: A chamber cluster (1) for a co-axial damper unit, used in a suspension module, that is driven by the motion of a torsion bar (2), that transmits the rotational motion through gears (3), (4), (5) to a wing (6), enclosed within. The rotary motion of the wing (6), in a viscous medium in a volumous space (19), sealed by seals (10), (11), achieves damping by enclosing the wing (6), inside a W-shaped flexible component (7), and by the use of a two-phase viscous fluid, that is subject to a viscosity variation, by means of electromagnetic control through a device (15). Several chamber cluster (1) units connected via a bulkhead (20), create an assembly forming the co-axial damper unit, for use in a suspension module.

Abstract: An active damping system for use in connection with a vibration isolation system includes an intermediate mass between a base and an isolated payload. The intermediate mass is supported by at least one support element which also supports at least substantially all of the static forces of the isolated payload. An actuator dampens and isolates dynamic forces acting on the intermediate mass from the isolated payload. The active damping system also includes a payload support element and a passive damping element, both of which are coupled at one end to the payload platform and at an opposite end to the intermediate mass. A sensor is affixed to the intermediate mass to generate a feedback signal to a processor coupled to the actuator.

Abstract: Method and arrangement for oscillation isolation by means of an air bearing. The electropneumatic valves (4) for the compressed-air supply to the air bearing are subjected to a dither signal. This causes additional vibration of the mass 1 to be isolated. A compensation signal transmitter (12) ensures that additional vibration of the mass (1) is suppressed, by controlling actuators (10). Overall, hysteresis effects are avoided in the control of the compressed-air flow.

Abstract: A vibration isolator includes a housing having an upper fluid chamber, a lower fluid chamber, a piston, a tuning passage, and a linear inductance motor assembly for changing the isolation frequency of the vibration isolator. The piston is resiliently disposed within the housing. A vibration tuning fluid is located in the upper fluid chamber, the lower fluid chamber, and the tuning passage. The linear inductance motor assembly includes a magnet member and an inductance coil at least partially surrounding the magnet member. A control system is configured to selectively actuate the magnet member; wherein selective actuation of the magnet member selectively imparts a pumping force on the tuning fluid, thereby changing the isolation frequency.

Abstract: An electronic active mount capable of a bidirectional control includes a core positioned inside a housing and connected to an engine. A main rubber is configured to connect the core and the housing. An upper orifice is coupled to an end of the main rubber to form an upper fluid chamber. A membrane is coupled to be moved up and down is connected to a lower orifice. A lower housing is formed at a central portion of the lower orifice, and a diaphragm is spaced apart from the lower orifice at a predetermined distance, which may attenuate vibration by using two electromagnets provided in an electronic mount.

Abstract: A vibration reduction device includes: a rod rigid body supported between an engine and a vehicle body via respective elastic bodies, a resonance frequency of which is set to be lower than an engine rigid body resonance frequency; an elastic component that is provided on the rod rigid body and caused to deform by a force acting in an axial direction of the rod rigid body; an inertial mass supported by the elastic component; and an actuator that causes the inertial mass to reciprocate in the axial direction of the rod rigid body by generating a force that is proportionate to an axial direction velocity of the rod rigid body. As a result, resonance itself can be suppressed without reducing a double vibration proofing effect.

Abstract: A hydraulic mount apparatus (20) for supporting a vibration source is disclosed. The mount apparatus (20) includes a housing (22) that defines a housing chamber (24) separated by a partition assembly (62) into a pumping chamber (64) and a receiving chamber (66), each containing a magnetorheological fluid (68). A flexible body (48) is partially disposed in the pumping chamber (64) for deforming elastically in response to vibrations caused by an external excitation. A fluid passage (106) extends between the pumping chamber (64) and the receiving chamber (66) for passing the fluid therebetween during low frequency vibrations. A piezostack actuator (118) partially extends into the pumping chamber (64) for moving within the pumping chamber (64) for varying the volume of the pumping chamber (64) to prevent a pressure increase in the pressure chamber to substantially cancel relatively high frequency vibrations.

Abstract: A tie bar assembly includes front and rear units each including inner inserts interconnected with outer inserts with webs of elastomeric material. A pole sub-assembly is disposed between the units. The pole sub-assembly and the units define front and rear fluid chambers containing a magneto-rheological fluid. Fluid orifices are disposed through the pole sub-assembly for flow of the magneto-rheological fluid between fluid chambers. An electromagnet coil generates an electromagnetic field to affect viscosity of the magneto-rheological fluid. A connecting rod connects inner inserts and is slidably disposed through the pole sub-assembly for causing movement of the magneto-rheological fluid between fluid chambers. A displacement sensor detects movement to generate a signal to the electromagnet coil. Front and rear travel cushions are each disposed on the inner inserts for limiting the movement of the inner inserts toward the pole sub-assembly.

Abstract: A fluid-filled type active vibration damping device including: a first mounting member; a second mounting member; a main rubber elastic body connecting the first and second mounting members; a fluid chamber; an oscillation member that partially defines a wall of the fluid chamber; an actuator having an output shaft, the output shaft being connected to the oscillation member; a connecting member that interconnects the oscillation member and the output shaft at one point with the oscillation member superposed against a projecting distal end of the output shaft; and an abutting portion provided by superposed faces of the oscillation member and the output shaft being positioned in abutment with each other at an outer peripheral side of a connected section where the oscillation member and the output shaft are interconnected by the connecting member.

Abstract: The invention relates to a hydraulically damped drive train mount (1), in particular for a motor vehicle, comprising a mount housing (2) in which an elastic mount body (3) is arranged in a partially movable manner, the elastic mount body at least partially enclosing a first fluid chamber (4), and comprising a fluid-filled equalization chamber (6) sealed by a sealing element (5) that can be moved in the mount housing (2), wherein a membrane (7) arranged in the mount housing (2) separates the first fluid chamber (4) from the equalization chamber (6). The invention is characterized in that the pressure in the equalization chamber (6) can be adjusted by means of the sealing element (5) that is formed as an axially movable piston (8).

Abstract: An electromagnetic actuator wherein an annular supporting member secured to a stator and an oscillator member secured to a movable member are disposed in opposition in an axis-perpendicular direction and are elastically linked by a supporting rubber elastic body disposed therebetween. One axial face of the supporting rubber elastic body is furnished with an inside peripheral recessed portion and an outside peripheral protruding portion while another axial face is furnished with an inside peripheral protruding portion and an outside peripheral recessed portion so as to establish in the supporting rubber elastic body an elastic center axis that curves along a sinuous trajectory of an interconnected peak segment and valley segment situated between opposing faces of the annular supporting member and the oscillator member in the axis-perpendicular direction.

Abstract: A method includes the steps of: detecting “starter ON” by IG-SW signal (step S12); calculating an moving average value TCRKAVE of crank pulse intervals (steps S13-S17); determining engine starting when the TCRKAVE is less than or equal to a threshold value Tth (step S19); and controlling a vibration isolating support unit M based on a natural vibration frequency of the engine when engine starting is determined (steps S20-S22).

Abstract: Disclosed is a parallel type engine mount structure that includes a main rubber member having a core disposed at an upper portion thereof and a fluid chamber disposed at a lower portion thereof. A bracket is disposed at an exterior of the main rubber member and a membrane is mounted at a lower portion of the fluid chamber. Additionally, a first space is disposed at a lower portion of the membrane on which one end of a first leaf spring is mounted. An orifice is disposed at an exterior side of the first space and includes an upper liquid chamber formed between the main rubber member and the membrane and a lower liquid chamber. A driver is disposed at an exterior side of the bracket and includes a second space formed at a lower portion thereof and a second leaf spring connected to the first leaf spring.

Abstract: Disclosed herein is an active mount including a housing surrounding components within the active mount and providing and outer surface, and a core disposed at an inside upper portion of the housing inside having an upper portion protruding outward from the housing. Additionally, an insulator is connected to a lower portion of the core and extends radially outward. An actuating mechanism is disposed at a predetermined distance from a lower portion of the insulator and includes a vertically movable center. A driving unit is disposed horizontally outside of the actuating mechanism and is configured to apply a force for vertically moving the center of the actuating mechanism.

Abstract: A mass damper method includes providing an electroactive polymer (7) and using the electroactive polymer (7) to manufacture a mass damper (6). The mass damper (6) for damping a vibrating system of a motor vehicle includes at least one of a damping body (10) forming a countervibrating mass with a damping spring (11) and a springy damping body (10) forming the countervibrating mass. The damping body (10) is indirectly or directly coupled with the vibrating system. The springy damping body (10) or the damping spring (11) includes an electroactive polymer (7). A motor vehicle exhaust system of an internal combustion engine is provided including an exhaust gas line (3) with an exhaust pipe (4), an exhaust gas-treating device (5) integrated in the exhaust pipe and the mass damper (6) coupled with the exhaust gas line.

Abstract: A variable stiffness liquid inertia vibration isolation device includes a liquid inertia vibration elimination isolator and a variable stiffness spring operably associated with the liquid inertia vibration elimination isolator for varying the stiffness of the liquid inertia vibration isolator. The variable stiffness spring may include an elastomeric pad exhibiting a first stiffness along a first axis and a second stiffness, significantly greater than the first stiffness, along a second axis that is perpendicular to the first axis.

Abstract: A damping control device includes a lower core, a nonmagnetic orifice, an upper core, and a membrane made of an elastic material to shield a lower end of the lower core, and in which the lower core and the upper core are magnetized when a current is applied to the coil, and a predetermined amount of the MR fluid is filled therein, such that the MR fluid flows between the pressure applying plate and the upper plate according to an elastic compression of the membrane.

Abstract: An electromotive active vibration absorber apparatus mounted to a vehicle to attenuate vibration of the vehicle may include elastic members mounted to an housing, an inner yoke having an upper yoke part and a lower yoke part which are fastened to the elastic members respectively, wherein an inner magnetic substance is disposed between the upper and lower yoke parts, and an outer yoke enclosing the inner yoke and having top and bottom portions dented to form inner and outer support members and a connector spoke and receive coil units therein, wherein the coil units include an upper coil unit and a lower coil unit, the upper coil unit being mounted above the connector spoke and the lower coil unit being mounted under the connector spoke respectively, between the inner and outer support members of the outer yoke, and wherein the coil units are controlled to vibrate the inner yoke when power is applied thereto.

Abstract: In a so-called motoring state at the time of engine starting before actuating engine, there is a problem that a roll vibration, which is generated when an engine revolution speed Ne is at a predetermined engine revolution speed and vibrates the engine and the vehicle body largely, can not be suppressed. For this reason, the present invention provides an active vibration isolating support apparatus in which the roll vibration can be suppressed in the motoring state at the time of engine starting.

Abstract: A sprung mass damping control system of a vehicle, which suppresses sprung mass vibration generated in a vehicle body by adjusting a driving control amount of a drive source (the second motor-generator), includes a spring vibration control amount calculating device that sets a sprung mass damping control amount for suppressing the sprung mass vibration, a drive source control device (a motor-generator control device) that executes sprung mass damping control by controlling the driving control amount of the drive source to realize the sprung mass damping control amount, and a sprung mass damping control amount adjusting apparatus (a sprung mass damping control amount responsiveness compensating portion) that adjusts the phase of a sprung mass damping control signal related to the sprung mass damping control amount according to the situation. A vehicle is provided with this sprung mass damping control system.

Abstract: An active dynamic vibration absorber apparatus for a vehicle that may be mounted to a frame of the vehicle and vibrates when power may be supplied to attenuate vibration of the vehicle, may include a housing, an upper spring and a lower spring, and a yoke assembly disposed between the upper spring and the lower spring which may be plates arranged in parallel, and selectively vibrates up/down in the housing, wherein the yoke assembly has an upper protrusion and a lower protrusion that protrude from the top and the bottom thereof, respectively, the upper protrusion being fastened to the center of the upper spring through the housing, and the lower protrusion being fastened to the center of the lower spring in the housing.

Abstract: A yoke of an actuator of an active vibration isolation support system, which controls an internal pressure of a liquid chamber by reciprocally oscillating a movable core by energizing a coil, includes a cylindrical portion and a flange portion. The cylindrical portion is disposed on an outer side of the yoke in a radial direction and faces an inner peripheral surface of the coil, while the flange portion faces an end surface of the coil. The yoke further includes an inner inclined surface formed in an inner side of an intersection of the cylindrical portion and the flange portion, and inclined in such a manner that an outer side thereof in the radial direction with respect to an axis of an actuator inclines upward. Accordingly, the vector of a magnetic flux generated through the energization of the coil can be oriented toward the movable core from the flange portion of the yoke via the inner inclined surface thereof.

Abstract: A hydraulic mount includes a closable bypass and a decoupling membrane. When the bypass is opened, however, the main effect that can be achieved by opening the bypass, namely the decrease in the spring rate at higher frequencies, is worsened. It is thus desirable to render the decoupling membrane ineffective when the bypass is open. The aim is achieved in that the closure device of the bypass includes blocking elements for blocking the decoupling membrane in the first switching position of the closure device when the bypass is open and can be released in the second position of the closure device when the bypass is closed.

Abstract: Shock absorber for an at least partially muscle-powered bicycle having a damper device having a first and a second damper chamber assigned thereto which are hydraulically coupled with one another through a damping valve. In the damping valve a flow duct with a field-sensitive, rheological medium is provided. The damping valve has a field generating device assigned to it which serves for generating and controlling a field intensity in the flow duct of the damping valve. The flow duct comprises in the damping valve a collection chamber which is hydraulically connected with the first damper chamber through a plurality of flow apertures, wherein at least one flow aperture is configured as a through hole and at least one flow aperture, as a closable valve opening provided with a one-way valve. The collection chamber is hydraulically connected hydraulically with the second damper chamber via a plurality of fan-type damping ducts each separated from one another by a fan wall.

Abstract: An active damping system for use in connection with a vibration isolation system includes an intermediate mass between a base and an isolated payload. The intermediate mass is supported by at least one support element which also supports at least substantially all of the static forces of the isolated payload. An actuator dampens and isolates dynamic forces acting on the intermediate mass from the isolated payload. The active damping system also includes a payload support element and a passive damping element, both of which are coupled at one end to the payload platform and at an opposite end to the intermediate mass. A sensor is affixed to the intermediate mass to generate a feedback signal to a processor coupled to the actuator.

Abstract: An active vibration damper including: an inner shaft member provided to a movable member; an outer tube member provided to a stator; a pair of leaf springs elastically connecting axially both sides of the inner shaft member and the outer tube member so as to make a linear actuator operatable by itself; an elastic connecting rubber connecting the inner shaft member and the outer tube member; a mass body holding portion provided to the inner shaft member for holding an additional mass body that is disposed further outwardly than the elastic connecting rubber; and a housing having a structure dividable in an axial direction in which respective openings are secured to each other with an annular seal being interposed therebetween at an outer peripheral side of the elastic connecting rubber.

Abstract: A multilevel magnetic system described herein includes first and second magnetic structures that produce a net force that transitions from an attract force to a repel force as a separation distance between the first and second magnetic structures increases. The multi-level magnetic system is configured to maintain a minimum separation distance between a transition distance where the net force is zero and a separation distance at which a peak repel force is produced.