Abstract: A rear engine mount includes a rectangular upper metal plate member, a metal stopper member, and a lower metal plate member. The metal stopper member includes a pair of side plates, and a bottom plate, which collectively form a shape resembling the letter U, and stands on the lower surface of the upper metal plate member at longitudinally opposite end portions. The lower metal plate member is disposed a predetermined distance away from the upper metal plate member in a facing condition, with the metal stopper member disposed therebetween, and includes a pair of retaining portions provided at opposite end positions located in opposition to the opposite end portions of the upper metal plate member. A second stopper portion includes a pair of vertical plate portions which stands on the lower metal plate member, and a horizontal plate member which is attached to the ends of the vertical plate portions and extends over the bottom plate of the metal stopper member, thereby surrounding the bottom plate.

Abstract: A hydraulic bearing includes a supporting bearing, a bearing base, and an annular spring element of elastomeric material interconnecting the supporting base and the bearing base. A working chamber and a compensating chamber are bounded by the supporting bearing and bearing base and filled with damping fluid. A partition having an opening separates the working chamber from the compensating chamber. The opening connects the working chamber and the compensating chamber in a fluid-conducting manner. An annular stop is disposed in the working chamber and is movable relative to the supporting bearing in an axial direction. An inner peripheral edge of the annular stop is received in a receiving portion of the supporting bearing. A ratio of a thickness of the inner peripheral edge in the axial direction and a height of the receiving portion in the axial direction is 0.5 to 1.

Abstract: A partition member having a rubber elastic membrane of a liquid filled vibration isolating device is provided. A ring-shaped metal fitting is formed by superimposing a first ring-shaped metal fitting on a second ring-shaped metal fitting. The first metal fitting and the second metal fitting are formed by press molding and are bonded integrally by means of the rubber elastic membrane thereby closing the opening of the ring-shaped metal fitting. Accordingly, the ring-shaped metal fitting of a complex configuration providing an orifice groove for forming the orifice is easily manufactured by simple working.

Abstract: A liquid-sealed anti-vibration device wherein an annular space is formed between an orifice member and a partition plate member, crimped and fixed downwardly of the orifice member to an anti-vibration device proper, of a partition; and a rubber-like elastic membrane is disposed in the space and has a base portion attached fixedly to the one of the orifice member and the partition plate member and an open terminal at a distal side, the open terminal being slidably in pressure contact with the other, thus constituting a cantilevered sliding membrane structure. Thereby it is possible to diminish the amplitude dependency, to reduce the dynamic spring constant in a wide spectrum of medium and high frequencies, and to lower the noise.

Abstract: A powertrain mount comprises an upper orifice plate, a lower orifice plate, and a generally planar diaphragm having an enlarged central node. The central node is in constant contact with the upper orifice plate and in contact with the lower orifice plate. A periphery of the diaphragm is free to move between the upper orifice plate and the lower orifice plate.

Abstract: Disclosed is a hydraulic antivibration mount. The mount has an annular rubber spring et in an outer metal casing, encasing an inner metal portion having a central mounting means. The outer metal casing is crimped over the flange of an end cap. Located with the end cap and retained within the crimped portion is a flexible diaphragm. Also retained within the crimped portion is a damper plate dividing the interior of the mount into an upper chamber A and a lower chamber B to be filled with fluid. The damper plate is formed from an upper plate and a lower plate. The upper and lower plates form a flow channel between the two plates which extends at least partially around the circumference of the damper plate, the flow channel permitting communication between the upper and lower chamber. The upper plate has an opening communicating to the upper chamber with an integral tab extending from the opening into the flow channel to block the channel.

Abstract: The hydraulic antivibration support comprises two strength members interconnected by an elastomer body defining part of a liquid-filled working chamber which communicates via a constricted passage with a compensation chamber that is separated from said working chamber by a rigid partition. The compensation chamber is defined by an annular bellows presenting an annular fold which projects into the compensation chamber and which is of a shape that does not present circular symmetry.

Abstract: Disclosed is a fluid-tight vibration damping device including a first and a second mounting member elastically connected with each other by an elastic body interposed therebetween, a primary fluid chamber filled with a non-compressible fluid and partially defined by the elastic body and a movable rubber plate partially defining the primary fluid chamber by one of its opposite surfaces. An engaging member is disposed to be opposed to the other surfaces of the movable rubber plate with a spacing therebetween. The engaging member is adapted to be engaged with an engaging portion integrally formed with the movable rubber plate to restrict an amount of displacement of the movable rubber plate in directions toward and away from the interior of the primary fluid chamber.

Abstract: A hydraulic two-chamber bearing for damping vibrations, in particular an engine mount on motor vehicles, having an engine-mount plate, a bearing spring made of rubber-elastic material, a working chamber and a compensation chamber for the liquid which are separated from each other by a partition provided with flow-through openings, and an elastic pressure diaphragm which terminates the compensation chamber, characterized in that the amount of fluid flowing through the openings (6) of the partition (5) is controlled as a function of the amplitude (A) of the vibrations.

Abstract: A fluid-filled active vibration damping device including: a pressure-receiving chamber partially defined by an elastic body; an oscillating fluid chamber partially defined by an oscillating rubber plate on one side thereof; a first orifice passage for a fluid communication between the pressure-receiving and oscillating fluid chamber, which are filled with a non-compressible fluid; and a working air chamber partially defined by the oscillating rubber plate on the other side thereof, to which an air pressure variation is applied to cause an oscillation of the oscillating rubber plate. A ratio V/Q of a passage volume V of the first orifice passage to a unit flow amount Q of the fluid through the first orifice passage caused by the oscillation of the oscillating rubber plate based on the air pressure variation applied to the working air chamber is held within a range of about 1-10.

Abstract: A switchable liquid-filled vibration absorbing mount has a stopper device interposed between a first diaphragm and a bottom portion for regulating downward movement of pushing member when a vacuum is introduced into a switching chamber, so that a protrusion of a valve member does not come out of an inner orifice when a vacuum is applied to the switching chamber to move the first diaphragm to a first position opening the orifice.

Abstract: A hydraulic damping bearing including a working chamber (1) and a compensating chamber (2) which are filled with damping fluid (3). A partition (4) is provided between the working chamber (1) and the compensating chamber (2), the partition having at least one damping conduit (5) which connects the working chamber (1) and the compensating chamber (2) in a fluid-conducting manner. The partition (4) is designed as a orifice cage and includes at least two orifice disks (6, 7) which are associated with each other in such a manner that they are axially adjacent in the direction (8) of the introduced vibrations. A diaphragm (9) that is capable of vibrating is axially arranged between the orifice disks (6, 7) to isolate higher-frequency vibrations, the partition additionally featuring an absorber channel to absorb idling vibrations.

Abstract: This invention provides a switching type liquid-in vibration isolating device capable of opening/closing an orifice by changing over between the atmospheric and negative pressure in a switching chamber corresponding to shake and idle vibration, respectively.

Abstract: Disclosed is a compact vibration isolation system for mounting an inertial sensor assembly (ISA) to an Inertial Measurement Unit (IMU) housing. The housing is mounted to a support that is subjected to shock and vibration. The vibration isolator assembly includes a ring shaped elastomeric member laminated between a ring shaped inner member and a ring shaped outer member. The inner member is securely mounted to the ISA, and the outer member is mounted to a support of the IMU housing. Because of the compact size of this system, the IMU housing contains and protects the elastomeric member from potential contamination and damage, as well as eliminates the need for delicate mechanical and electrical interfaces. The elastomeric member of the system isolates the ISA from shock, vibration, and acoustic energy that may otherwise be transmitted from the support to the ISA.

Abstract: An elastomer spring for supporting an axially arranged coil spring, in particular in an engine mounting is constructed to reduce the radial loads on the coil spring with simultaneous damping and includes a transversely soft composition for the elastomeric spring. The elastomeric spring is provided with a centering projection which may be introduced into the coil spring and a section which may be deformed by the effect of radial forces, with a molded sheet being provided to stabilize the force carrying section of the elastomeric spring.

Abstract: A hydraulic vibration isolating apparatus includes a first installation member, a rubber elastic member, a second installation member, a diaphragm, and a partition member. The second installation member has a cylinder-shaped press-in wall, and an orifice forming wall. The orifice forming wall extends from one of the opposite ends of the press-in wall toward the inner peripheral side and then toward the partition member, and forms an orifice passage together with the press-in wall and the partition member. The orifice passage communicates a main liquid chamber with an auxiliary liquid chamber. The hydraulic vibration isolating apparatus can be manufactured with ease and at reduced costs.

Abstract: A powertrain mount comprises an orifice plate and a track member. The orifice plate has an exit, a first surface sloping toward the exit, and an inner surface. The track member has an outer surface proximate the first surface of the orifice plate, and the outer surface of the track member has an entrance. A containment plate forms an orifice track with the first and inner surfaces of the orifice plate and with the outer surface of the track member.

Abstract: A hydraulic vibration-damping support comprising two strength members interconnected by an elastomer body which defines a working chamber filled with liquid and separated from an easily-deformable compensation chamber by a rigid partition. The partition includes a decoupling flap which comprises a flexible membrane mounted to move with clearance between two intermediate gratings mounted on two rings via two elastomer bands.

Abstract: A fluid-filled vibration damping device includes a first mounting member and a cup-shaped second mounting member elastically connected by an elastic body such that an opening of the second mounting member fluid-tightly closed by the elastic body. An outer metal sleeve having an outward flange portion at its upper end is bonded by vulcanization to an outer circumferential surface of the elastic body, and a cylindrical orifice member is fitted onto the outer metal sleeve with an upper end face superposed on the outward flange portion. The outer metal sleeve and the orifice member are fitted into the cylindrical wall portion of the second mounting member. An outer metallic ring bonded by vulcanization to an outer periphery of the elastic rubber layer is superposed on an axially upper surface of the outward flange portion portion, and firmly fitted into an open end portion of the cylindrical wall portion of the second mounting member.

Abstract: A vibration isolator includes a first metallic mounting member; a metallic body member disposed away from the first metallic mounting member in the vibration input direction; an elastic body portion elastically connecting the first metallic mounting member and the metallic body member; and a second metallic mounting member. The metallic body member includes a flange portion protruding radially outward from a part of its end facing the first metallic mounting member and a first protrusion protruding radially outward from the remaining part of the end to a greater extent than does the flange portion. The opposite end of the metallic body member is plugged with a seal member to thereby form a liquid chamber within the metallic body member. The second metallic mounting member is fixedly press-fitted onto the metallic body member and includes a second protrusion. The first and second protrusions are superposed to thereby form a stopper portion. The stopper portion is covered and held by a stopper covering portion.

Abstract: A hydraulic vibration-damping support comprising two strength members interconnected by an elastomer body which defines a working chamber communicating with a compensation chamber via a constricted passage. The two hydraulic chambers are separated from each other by a rigid partition formed by two gratings disposed one on the other, and a decoupling flap is mounted with a small amount of clearance between the gratings. The decoupling flap is provided with two catches that are clipped onto one of the gratings.

Abstract: A switched vibration isolator has an elastic base member fixed to a first fitting member, and a tubular member fixed the elastic base member. A partition device is disposed in the tubular member, and has an outer diameter, a first partition side opposing the elastic base member defining a main liquid chamber therebetween, and a second partition side opposite the first partition side. The partition device defines an orifice communicating with the main liquid chamber. A partition receiving plate has a diameter greater than an outer diameter of the partition device and the partition device is mounted thereon. A diaphragm is disposed opposing the partition receiving plate and defining an auxiliary liquid chamber communicated with the main liquid chamber via the orifice. The partition receiving plate and the diaphragm are fixed in place together by an end of the tubular member.

Abstract: A fluid-filled elastic mount of suspension type, wherein a lower open-end of a cylindrical portion of a second mounting member is fluid-tightly closed by a first mounting member and a tapered elastic body interposed therebetween, extending from the lower open-end into the cylindrical portion. An upper open-end portion of the cylindrical portion is closed by a flexible layer for forming a fluid-filled chamber between the elastic body and the flexible layer and being divided by a partition member into a pressure-receiving chamber defined by the elastic body and an equilibrium chamber defined by the flexible layer, which are held in communication by an orifice passage An elastic restricting projection is bonded to the partition member to protrude and be located in an intermediate portion between the radially opposite elastic body and the cylindrical portion, for restricting an annular region of the intermediate portion.

Abstract: The invention provides an antivibration device lightweight and excellent in heat interception, wherein a top opening of a main body fitting (1) and an upper attachment fitting (2) are interconnected through a vibration-isolating base (3); a stopper fitting (8) of a generally cylinder form partly cutout is connected to the main body fitting (1) with its upper edge bent inwardly to form a stopper portion (81), which is located above a stop flange (22) of the upper attachment fitting (2) and has a stopper function against a large vertical displacement; a stopper rubber member (15) is fitted to the stopper fitting (8) so as to extend from the upper surface of the stopper portion (81) to an outer surface of its side plate by vulcanization molding; the cutout portion (83) of the stopper fitting (8) is plugged by a heat shield rubber membrane portion (17) vulcanization molded integrally with the stopper rubber member (15).

Abstract: A hydraulically damped mounting device has a first anchor part in the form of a clip and a second anchor part in the form of a boss connected to the cup by a deformable wall. The deformable wall bounds a working chamber for hydraulic fluid which is connected to a compensation chamber by a passageway. A strap is provided extending around the mounting device which is fixed to either or both of the anchor parts. The fixing may be via a clip.

Abstract: The present invention provides a vibration isolator having a stopper function in the up-and-down direction and the fore-and-aft and lateral direction square to the axis, being able to prevent water intruded into the top surface of a flange from being accumulated, and allowing the dies axially to be parted.

Abstract: A vibration-isolating device equipped with a vibration-isolating substrate comprising a rubber elastomer interposed between a first attachment metal fitting and a cylindrical main metal fitting, stopper metal fittings to restrain excessive deformation, which is capable of effectively making use of limited installation space as well as easy and proper assembling of the stopper metal fittings. A body portion comprising the vibration-isolating substrate, a stopper portion provided on the first attachment metal fitting and the annular stopper metal fitting is constructed to be an elongated circle or ellipse in cross-section. Furthermore, caulking to the flange portion at the upper end of the stopper metal fitting is done only on both ends (left and right ends shown in the figures) in the direction of the major axis of the elongated circle or the ellipse.

Abstract: An engine mount to be installed above an opening of a vehicle body member to support the engine in vibration-proof fashion, on which the intrusion of foreign matter from the opening can be precluded without increase in components. It comprises a cylindrical main body fitting, an upper fitting, a vibration-insulating base of rubber elastomer interconnecting both fittings, a diaphragm disposed within the main body fitting to face to the base, and a liquid-sealed chamber partly enclosed by the diaphragm, the diaphragm being integrally provided at its lower circumferential end with a cylindrical rubber extension. The rubber extension extends downwardly from the diaphragm, lower edge thereof being turned-up to come in contact with a peripheral edge portion around the opening thereby to close the opening.

Abstract: An engine mount bushing for use on a motor vehicle. The bushing includes a hard case, and a core located within that case. The bushing further includes an elastomer isolator contacting the core and case. The bushing also includes a foamed elastomer isolator contacting the core, the case and the elastomer isolator.

Abstract: The present invention aims at providing a liquid sealed type vibration isolator capable of positioning a partition excellently with the construction of the partition simplified, and maintaining stable damping characteristics of an orifice. To meet the requirements, an outer circumferential portion of the partition forming the orifice is made so that the outer circumferential portion defines at least a part of one or two sides of a cross section of the orifice, and a positioning device formed of a partition press fitting or inserting structure with respect to a groove, or a partition engaging structure is provided in a joint portion between the partition and the other orifice forming member with the construction of the partition simplified, whereby it is rendered possible to improve the accuracy of the partition and obtain a desired cross section of the orifice.

Abstract: Process for manufacturing hydraulic anti-vibration mounts comprising two rigid parts (2, 4) connected by an elastomeric body (5) that partially defines a liquid-filled working chamber (A) that communicates via a restricted passage (C) with a compensating chamber (B). A rigid partition (6) which separates the working chamber (A) from the compensating chamber (B) comprises a recessed shell (10) whose upper face is covered by a closing plate (11). Two parallel grooves (16, 17) are let into the upper face of the recessed shell and communicate with the compensating chamber (B), while the closing plate comprises a cavity allowing communication between either both grooves, or one (16) of the grooves, and the working chamber (A) in order thus to define the restricted passage (C).

Abstract: A hydraulically damping elastomeric bearing, which is suitable for mountings in a motor vehicle, includes an elastic connecting body which is arranged between a first bearing component and a second bearing component and connects these elastically to one another. Two chambers which are filled with a liquid damping medium communicate with one another via at least one throttle duct. To generate a specific damping characteristic, at least two throttle ducts are provided, which connect the two chambers to one another, the first throttle duct containing an absorber which is adjusted as a function of pressure differences between the chambers in the first throttle duct, the absorber controlling the opening cross-section of the second throttle duct as a function of its adjusting movements.

Abstract: A mount for a powertrain component of a motor vehicle comprises first and second mounting members, an elastomeric body connected to the first mounting member and connected to the second mounting member, and a plate. The plate defines first and second chambers, and has an orifice for the passage of fluid therethrough. A plunger having at least one hole is connected to the first mounting member, and a compliance member is disposed proximate the at least one hole.

Abstract: A hydraulic vibration-damping support comprising two strength members interconnected by an elastomer body defining in part a working chamber filled with liquid, said working chamber communicating via a constricted passage with a compensation chamber separated from said working chamber by a rigid partition. The constricted passage is made up of two stages defined by two pieces of sheet metal forming the rigid partition.

Abstract: A liquid-filled vibration-proof device constructed so that the positioning and supporting function of a partition is performed firmly and a port opening of an orifice passage in the partition is not obstructed to ensure a sufficient opening area of the port opening. To that end, a diaphragm and a partition located inwardly thereof are hermetically fixed to a cylindrical fitting at a side opposing a vibration-isolating base thereby partitioning an enclosure between the vibration-isolating base and the diaphragm into two liquid chambers, the both liquid chambers being put in communication with each other through the orifice passage; the vibration-isolating base is provided at a marginal part of its inner face with protruding portions for positioning, with which an upper marginal portion of the partition is in opposed contact, disposed circumferentially at intervals at plural positions so as not to impede the flow of the port opening.

Abstract: A liquid-in vibration-isolating device, used to support a vibration generating source such as a vehicle engine for the purpose of vibration isolation, prevents hitting sound or adsorption of a diaphragm due to abutment against a partition member and proper functioning of the device is maintained, without increasing the volume of sub-liquid chamber on the diaphragm side. The device includes a cylindrical body fitting and a boss fitting connected via a vibration isolating substrate. A diaphragm is provided on an opening portion at the upper extremity, being partitioned into a main liquid chamber on the vibration isolating substrate side and a sub-liquid chamber on the diaphragm side by means of a partition member. Both liquid chambers are connected through an orifice of the outer circumferential portion. Multiple convex portions are provided for restraining the diaphragm from abutting against the partition member.

Abstract: A fluid-filled vibration-damping device includes an elastic body elastically connecting a first and a second mounting member so as to close one open-end portion of the second mounting member, and a partition member assembled with the second mounting member on one side thereof to form therebetween a pressure-receiving chamber partially defined by the elastic body and assembled with a fixing member on the other side thereof to form an equilibrium chamber partially defined by a flexible layer supported by one open-end portion of the fixing member. The partition member includes a first and second fixing grooves axially spaced apart from each other with an intermediate portion therebetween, to which the other open-end portions of the second mounting and fixing members are respectively press-fitted, and an air passage for connecting a working air chamber to an external air conduit is open in the intermediate portion.

Abstract: The present invention provides an engine mount the space of which can be narrowed, which includes a small number of parts, and durability of which is improved by coping with continuous great movements by narrowing the range of movements.

Abstract: A hydraulic vibration-damping support comprising two strength members interconnected by an elastomer body defining in part a working chamber filled with liquid, said working chamber communicating via a constricted passage with a compensation chamber separated from said working chamber by a rigid partition. The rigid partition is provided with two gratings between which a decoupling valve member is mounted with clearance, which decoupling valve member is provided with studs disposed so that said decoupling valve member has a midplane disposed on a slant relative to the gratings.

Abstract: A vibration-isolating device for mounting and/or supporting an apparatus in vibrational insulation from adjacent structures, and a method for fabricating the vibration-isolating device. The vibration-isolating device includes a housing with a side wall portion joined to an end cap. A cushion is disposed on an inner surface of the side wall portion. The cushion is at least partially spaced from the end cap to form an interior compartment. A displaceable member is affixed to the cushion, extending away from the end cap. The displaceable member moves relative to the housing to dampen vibrations or sudden forces exerted on either the member or the housing.

Abstract: The present invention provides a liquid-filled type vibration isolator which supports a power unit such as an automobile engine or the like which can effectively perform the suppression of the vibration and the improvement of the steering stability and the riding comfort at the time of runninng and the suppression of vibration at the time of idling.

Abstract: A liquid-filled engine mount is disclosed which includes a rubbery elastic member interposed between an engine and a vehicle body, a diaphragm positioned in opposed relation to the rubbery elastic member. The engine mount defines a liquid chamber therein. The liquid chamber holds an actuating liquid therein. The liquid chamber has a partition wall disposed therein. The partition wall separates the liquid chamber into primary and secondary chambers. The primary chamber is provided on a side of the elastic member while the secondary chamber is provided on a side of the diaphragm. The partition wall has first and second orifices extending therethrough. The first orifice communicates with both the primary chamber and the secondary chamber. The second orifice communicates with the primary chamber. The first and second orifices provide different resistances to the liquid flowing therethrough.

Abstract: Antivibration device comprising an antivibration mount fastened to a vehicle chassis and a motor bracket fastened to a vehicle motor. The motor bracket includes two branches each having a downwardly open housing which fits on a corresponding ear of the antivibration mount. The branches of the motor bracket are secured to the ears of the antivibration mount through screws which extend at an angle of 45° relative to the horizontal.

Abstract: An engine mount has a stopper rubber portion constituted of an outer peripheral flange protruding radially outwardly from the engine side metal fitting and a coating rubber covering an outer periphery of said outer peripheral flange. A radius of curvature of contact parts positioned at one direction of two radial directions orthogonal to each other in a radial plane substantially equals to a radius of curvature of an inner periphery of the body side metal fitting and a thickness of the coating rubber positioned in said one direction is constant in a circumferential direction thereof, whereby the contact parts positioned in said one direction are widely brought into contact with the inner periphery of the body side metal fitting and distorted uniformly. The distortion of the stopper rubber portion is also made uniform when applying a load thereto.

Abstract: This invention provides a switching type liquid-in vibration isolating device capable of opening/closing an orifice by changing over between the atmospheric and negative pressure in a switching chamber corresponding to shake and idle vibration, respectively.

Abstract: A liquid-sealed vibration-proof device is constructed so that a partition dividing its interior into a main and a subsidiary liquid chamber comprises an orifice member having an orifice, a partition plate member provided subjacently in contact with the orifice member, and an elastomeric membrane interposed between a central plate section of the orifice member and the partition plate member. The elastomeric membrane includes a central plate-form portion held and pinched by the orifice and partition plate members, and a diaphragm portion extending outboard it to terminate at an open end which is slidably brought in pressure contact with an annular wall section of the orifice member. Openings are provided in the central plate section and the partition plate member holding and pinching the central plate-form portion, which is partly exposed to both chambers, as an elastic membrane capable of elastic deformation.

Abstract: An improved hydraulic engine mounting device is provided which includes a main body defined by first and second shells. Each of these shells contains a chamber separated from each other by an orifice assembly. The first shell includes a flange for supporting the orifice assembly the second shell interengaging with the first shell at the flange area. The diaphragm is interposed between the second shell and the orifice assembly within the second chamber. The orifice assembly includes a ledge portion extending about an outer perimeter of the orifice assembly, the perimeter of the diaphragm captured between the ledge portion and the perimeter of the second shell. A plastically deforming perimeter of the first shell presses the diaphragm between the orifice and the second shell to provide a tight hydraulic seal.

Abstract: A fluid-filled vibration damping device wherein two mutually spaced-apart mounting members are connected by an elastic body, which cooperate with an elastic wall member to partially define a pressure-receiving chamber, and a flexible diaphragm partially defines an equilibrium chamber on one side and a working air chamber on the other side. These chambers are filled with the non-compressible fluid and held in fluid communication with each other through the orifice passage. A negative pressure-regulating device applies different negative pressure to the working air chamber depending upon frequencies of vibration to be damped, so that a spring constant of the elastic wall member is changed corresponding to the vibration to be damped, thereby controlling a damping characteristics of the damping device.

Abstract: A hydraulic engine mount includes opposed mounting members secured to an elastomeric body and a base, respectively, with an orifice plate assembly interposed the body and the base to define a pumping chamber and a reservoir for hydraulic fluid to flow therebetween through an orifice track formed by the orifice plate assembly. An elastomeric decoupler disk is secured in a recess formed between two orifice plates of the orifice plate assembly and defines a gas spring or cushion space which may be filled or vented by a removable plug in one of the orifice plates. Improved dynamic rate and damping at low amplitude inputs to the mount are provided by the gas cushion biased decoupler as compared with a decoupler type mount without the gas cushion bias. The mount provides an advantage over conventional decoupled hydraulic mounts in that very strict dimensional tolerances are relaxed and performance characteristics, as well as ease of manufacturing, are improved.

Abstract: A hydraulic mount for automotive engine and powertrain applications includes an elastomer body, a base and a partition interposed the body and the base to form a fluid-pumping chamber and a reservoir. Circumferentially spaced axial extending holes or slots or an annular orifice track are formed in the partition together with a magnetic coil operable to impose a magnetic field on the holes, slots or orifice track to control the shear properties of a magnetorheological (MR) fluid in the pumping chamber and reservoir. An elastomeric decoupler member is in communication with at least one of the pumping chamber and the reservoir to reduce the mount dynamic stiffness for isolating low-displacement relatively high-frequency vibrations. Vibrations of multiple frequencies may be isolated by tuning the mount with a controller.