Abstract: A method for controlling a drivetrain of a vehicle during a shift process is described. The drivetrain includes a drive engine which is connected via a bow spring dual-mass flywheel to a transmission which can be uncoupled by way of a clutch. The bow spring dual-mass flywheel includes a bow spring which is arranged in a bow spring channel. The method includes detecting that the clutch is closed within the scope of a shift process. Furthermore, the method includes generating a torque intervention at the bow spring dual-mass flywheel independently of a torque request by a driver of the vehicle, in such a way that the bow spring is arranged on the same side of the bow spring dual-mass flywheel after the closing of the clutch as before the opening of the clutch.

Abstract: A damper device includes a retaining plate, a plurality of first spring members and an output plate. The retaining plate has an annular shape. The plurality of first spring members are held by the retaining plate. The output plate is elastically coupled to the retaining plate through the plurality of first spring members. The retaining plate is circumferentially divided into a plurality of divided retaining plate pieces.

Abstract: In an aspect, an isolator is provided for isolating torsional vibration between a crankshaft of an engine and an endless drive member. The isolator includes a driver drivable by the crankshaft, a pulley that is engageable with an endless drive member, at least one isolation spring that is positioned to transfer forces between the driver and the pulley and to isolate torsional vibrations in the driver and the pulley from one another, and a damping structure configured to frictionally resist relative movement between the driver and the pulley beyond a selected relative threshold angle, and to permit relative movement between the driver and the pulley within the selected relative threshold angle without frictional resistance from the damping structure.

Abstract: In an aspect, an isolator is provided, comprising a hub, a pulley, an isolation spring and a transition spring. The hub defines an axis and is connectable to a rotatable shaft of a rotary device. The pulley is rotatably mounted to the hub. The isolation spring and transition spring act in series in a torque path between the pulley and the hub. The isolation spring has a first spring rate. The transition spring has a second spring rate that is lower than the first spring rate.

Abstract: A torque filter having an impact spring constant includes a pair of left and right arc springs arranged at left and right sides and having spring constant values set based on a torque of a crank shaft which transfers a driving force of an engine as the torque. An impact spring is disposed in which the pair of the left and right arc springs face each other and has a spring constant value set with a threshold torque based on an instant speed change of the crank shaft.

Abstract: In a differential device which includes: a cross-shaped shaft body integrally including a first shaft and a second shaft orthogonal to each other, and configured to rotate integrally with an input member around an axis of the second shaft; a pinion pivotally supported on the first shaft; and a pair of side gears meshing with the pinion, the side gears respectively include small-diameter holes supporting the second shaft such that the second shaft passes through the small-diameter holes, and large-diameter holes continuous to outer ends of the small-diameter holes via step surfaces. The large-diameter holes respectively house fixing members connected to both end portions of the second shaft so as to block the side gears from coming off the second shaft, and output shafts are relatively unrotatably fitted in inner peripheral surfaces of the large-diameter holes outside the fixing members in an axial direction.

Abstract: A crank pulley decoupling device includes: a crank pulley connected to one end of a crankshaft and configured to transmit a rotational force; a first spring configured to be inserted into the crank pulley and to have one end provided in the crank pulley and the other end provided in the crank shaft; and a second spring configured to be inserted into the crank pulley and to be provided on an outer circumferential surface of the crankshaft. Spring design and design change are freely done by utilizing space in the crank pulley while the first and second springs are spaced apart so that impact therebetween is reduced, thereby improving durability and preventing decrease in efficiency due to friction and thus improving the product value.

Abstract: A vibration damper, including a cover plate with an annular portion, and a spring portion including spring retaining portions forming respective spaces and a spring blocking portions including respective protrusion segments and respective tab segments including respective portions of an edge of the cover plate and having a same first thickness. The damper includes springs at least partially located in the respective spaces, and having respective longitudinal ends, and a second cover plate or output flange connected to the cover plate. The springs are arranged to transmit torque to the cover plate. The respective protrusion segments have a same second thickness and include respective protrusions. Respective first portions of the longitudinal ends of the springs are engaged with the respective protrusions. Respective second portions of the longitudinal ends of the springs are engaged with the respective tab segments.

Abstract: A vehicular damper device interposed between an engine and an output shaft and provided with a dual-mass flywheel includes: a first inertial body in the form of a disk connected to a crankshaft of said engine and rotatable about an axis of said crankshaft; a torsional damping portion interposed between said first inertial body and said output shaft; a second inertial body in the form of a disk rotatable about said axis and having a smaller outside diameter than said first inertial body, said second inertial body cooperating with said first inertial body to constitute said dual-mass flywheel; and an elastic member interposed between said first inertial body and said second inertial body and operatively connecting said first and second inertial bodies such that said elastic member is elastically deformable according to an amount of relative rotation of the first and second inertial bodies.

Abstract: A damper device including an input element to which power from a motor is transmitted; a first elastic body to which power is transmitted from the input element; a first intermediate element to which power is transmitted from the first elastic body; a second elastic body to which power is transmitted from the first intermediate element; a second intermediate element to which power is transmitted from the second elastic body; a third elastic body to which power is transmitted from the second intermediate element; and an output element to which power is transmitted from the third elastic body. The first and second elastic bodies are coil springs, and the third elastic body is an arc spring that is arranged radially inward of the first and second elastic bodies.

Abstract: A damper device including an input element to which power from a motor is transmitted; a first elastic body to which power is transmitted from the input element; a first intermediate element to which power is transmitted from the first elastic body; a second elastic body to which power is transmitted from the first intermediate element; a second intermediate element to which power is transmitted from the second elastic body; a third elastic body to which power is transmitted from the second intermediate element; and an output element to which power is transmitted from the third elastic body. A stiffness of the first elastic body is higher than a stiffness of the second elastic body.

Abstract: In a damper apparatus, power is transferred, in order, from a motor, to an input, to a first elastic body, to a first element, to a second elastic body, to a second element, to a third elastic body, and to an output. The first and second elastic bodies are disposed radially outward of the third elastic body, and adjacent to each other on a single circumference. The first element has an annular outer peripheral portion that surrounds the first and second elastic bodies, and a pair of contact portions that are formed on peripheral edges on respective sides of the outer peripheral portion to protrude from the peripheral edges radially inward and to face each other, and that are between and in contact with the first elastic body and the second elastic body.

Abstract: A decoupler having a hub, a drive member and an isolator. The drive member is disposed about the hub for rotation about a rotational axis and includes an inner clutch surface. The isolator couples the hub and the drive member and includes a carrier, a plurality of arcuate springs, and a wrap spring. The carrier is received between the hub and the drive member and includes a carrier member, which defines a pair of apertures, and a pair of reaction blocks that are mounted in the apertures. The arcuate springs are mounted in the carrier member and are disposed between the hub and an associated one of the reaction blocks. The wrap spring has an end and a plurality of helical coils that are engaged to the inner clutch surface of the drive member. The end has an end face that is abutted against one of the reaction blocks.

Abstract: A torsional vibration damper for operation in an oil bath comprising an input flange for connecting to a drive motor, an output flange for connecting to a transmission, and a bow spring for the torsionally elastic coupling of the input flange to the output flange, where the bow spring is in contact radially on the outside with an encircling holding device that is formed on one of the flanges. At the same time, the holding device has an opening in the area of the bow spring, in order to enable a flow of oil through an area of contact of the bow spring with the holding device.

Abstract: A belt pulley damper for attenuating torsional vibrations of a drive shaft and includes a belt pulley for driving a pull mechanism, particularly a pulling belt. A torsional vibration damper, particularly a decoupler for torsional vibrations is connected with a drive flange and includes a driven disk movable circumferentially relative to the drive flange, and a driven disk is axially movable relative to a belt pulley. The belt pulley and the driven disk include axially-opposed teeth. The belt pulley teeth and the driven disk teeth can be engaged below a threshold pull force occurring during drive operation, and can be disengaged above the threshold pull force. In that manner, undesired torsional vibrations can be avoided by a free-wheel device without substantially increasing noise.

Abstract: The damper (12) includes first (14) and second (16) damping elements which are arranged in parallel by means of a connection disc (20). The first damping elements (14) comprise at least one first group (24) of resilient units (22) including at least two first resilient units (22) arranged in series by means of a first intermediate support element (26), and the second damping element (16) comprise at least one second group (34) of resilient units (32) comprising at least two second resilient units (32) arranged in series by means of a second intermediate support element (36). The damper includes at least one annular unit (39) for phasing of the resilient units (22, 32), which is distinct from the connection disc (20) and bears both the first (26) and second (36) intermediate support elements.

Abstract: A vibration damper, including a cover plate with an annular portion, and a spring portion including spring retaining portions forming respective spaces and a spring blocking portions including respective protrusion segments and respective tab segments including respective portions of an edge of the cover plate and having a same first thickness. The damper includes springs at least partially located in the respective spaces, and having respective longitudinal ends, and a second cover plate or output flange connected to the cover plate. The springs are arranged to transmit torque to the cover plate. The respective protrusion segments have a same second thickness and include respective protrusions. Respective first portions of the longitudinal ends of the springs are engaged with the respective protrusions. Respective second portions of the longitudinal ends of the springs are engaged with the respective tab segments.

Abstract: A torsional vibration damper with a damper component and a damper flange part limitedly rotatable within a circumferential clearance with respect to the damper component contrary to the effect of energy accumulator elements. The damper component is formed as a guide shell radially outside and surrounds the radial outmost circumferential section of the energy accumulator elements. The damper flange part comprises circumferentially disposed compression elements. The energy accumulator elements are circumferentially arranged in-between the compression elements. Cutouts formed in the guide shell and the compression elements engage radially into the cutouts whilst facilitating circumferential clearance.

Abstract: A device for connecting a generator to a belt drive of an internal combustion engine is provided, which includes a belt pulley (1) that is guided so that it can rotate relative to a hub (2) set on a shaft (3). At least one spring element is arranged between the belt pulley (1) and the hub (2) and connects the belt pulley (1) and the hub (2) to each other elastically for transferring rotational motion and here sets a relative rotation between the belt pulley (1) and the hub (2) corresponding to an effective torsional stiffness. The at least one spring element is placed with a defined movement play (s) with respect to the belt pulley (1) and/or the hub (2), in order to allow relative rotation through the movement play (s) in a first region (I) with a low torsional stiffness, while, in a second region (2), a high torsional stiffness can be generated by the at least one spring element.

Abstract: A spring retainer assembly, including: a flange plate; a plurality of springs in contact with a radially outer portion of the flange plate; a first cover plate; a second cover plate; a spring retainer; and at least one fastening device. The spring retainer and the first plate substantially surround respective outer circumferences of the plurality of springs; and the at least one fastening device is for fixedly connecting the spring retainer to a torque-transmitting device. In one embodiment, the spring retainer is axially fixed by the connection to the torque-transmitting device and includes a first portion, and contact of the first portion with the first plate positions the first plate in a desired axial position with respect to the plurality of springs. In one embodiment, the spring retainer includes a plurality of protrusions and a circumferential end for each spring is in contact with a respective protrusion.

Abstract: A torsional vibration damper, comprising at least two components which can be rotated counter to the resistance of at least one helical spring or bow spring precurved toward the rotational axis for compression of the at least one bow spring during a relative rotation among the components. The at least one bow spring is provided with support in the circumferential direction across the outside diameter thereof on a sliding shell. In order to reduce friction, the outside diameter of the at least one bow spring has a distance from the inside diameter of the sliding shell.

Abstract: An arc spring damper, including: a plurality of arc springs, a driving flange having a plurality of driving spring segment, a driven flange having a plurality of driven spring segments, and a ring plate including a plurality of radially extending retention segments. Each arc spring in the plurality of arc springs includes a passageway with first and second openings at first and second longitudinal ends, respectively, for the arc spring. Each driving spring segment includes a circumferentially extending driving portion and each driven spring segment includes a circumferentially extending driven portion. For each spring, a respective driving portion passes through the first opening into the passageway and a respective driven portion passes through the second opening into the passageway. Each radially extending segment from the plurality of radially extending segments is connected to and rotatable with a spring from the plurality of arc springs and radially restrains the arc spring.

Abstract: A device for damping vibrations comprising at least two coaxially arranged damper parts rotatable relative to each other to a limited extent in the circumferential direction, coupled by torque transmitting means and damping coupling means, which exhibit at least one energy accumulator unit, and forming the impingement areas for the energy accumulator units. At least one damper part forms a guide channel for the energy accumulator units. The individual impingement area on the damper part forming the guide channel for the energy accumulator units is formed by a stop element, connected in a torsion proof manner at least indirectly to the damper part and forms the abutment faces in the guide channel in the circumferential direction. The abutment face is capable of supporting the energy accumulator unit on both sides of the impingement area on the energy accumulator unit and is a part of the other damper part.

Abstract: The damper (12) includes first (14) and second (16) damping elements which are arranged in parallel by means of a connection disc (20). The first damping elements (14) comprise at least one first group (24) of resilient units (22) including at least two first resilient units (22) arranged in series by means of a first intermediate support element (26), and the second damping element (16) comprise at least one second group (34) of resilient units (32) comprising at least two second resilient units (32) arranged in series by means of a second intermediate support element (36). The damper includes at least one annular unit (39) for phasing of the resilient units (22, 32), which is distinct from the connection disc (20) and bears both the first (26) and second (36) intermediate support elements.

Abstract: A method of forming a torsional vibration damping disk, including the steps of: stamping a concave surface at a periphery of a disk; heat treating the stamped disk; placing at least one forming element at least partially in contact with at least a portion of the concave surface; and curling the periphery to partially surround the at least one forming element so that the at least one forming element is removable from the disk. In a second embodiment, the method includes the step of removing the at least one forming element after curling the periphery and includes the step of replacing the at least one forming element with at least one spring element.

Abstract: A driving force transmission apparatus includes a damper device that includes: a plurality of elastic bodies provided between a first member, to which driving force is transmitted from a driving source, and a second member transmitting the driving force to a fluid transmission device; an outer coupling portion integrally rotatably coupled to a radially outer portion of the first member; and an inner coupling portion integrally rotatably coupled to a radially inner portion of the second member. The damper device transmits driving force, transmitted to the first member, from the outer coupling portion to the inner coupling portion via the plurality of elastic bodies and then to the second member. One of the outer coupling portion and the inner coupling portion of the damper device is fixedly coupled via a highly rigid portion and the other one is axially movable along a rotation axis.

Abstract: A torsional vibration damper, comprising at least two components which can be rotated counter to the resistance of at least one helical spring or bow spring precurved toward the rotational axis for compression of the at least one bow spring during a relative rotation among the components. The at least one bow spring is provided with support in the circumferential direction across the outside diameter thereof on a sliding shell. In order to reduce friction, the outside diameter of the at least one bow spring has a distance from the inside diameter of the sliding shell.

Abstract: A torque damper can comprise a clutch piston arranged within a cover of a torque converter and can be adapted to be moved between a connected position and a non-connected position relative to the cover. Damper springs can be arranged along the circumference of the clutch piston. Connecting members can be arranged abutting against one end of the damper spring and adapted to connect a turbine arranged within the cover and the clutch piston via the damper spring. Damper holders can be arranged abutting against the other end of the damper spring and adapted to hold the damper spring against the compressive force applied to the damper spring from the connecting member. Guide sheets having wear resistance can be interposed between the circumference of the clutch piston and the damper spring and can be adapted to guide the damper spring. A torque input to the cover can be transmitted to the turbine via the clutch piston and the damper springs when the clutch piston is in the connected position.

Abstract: A spring retainer assembly, including: a flange plate; a plurality of springs in contact with a radially outer portion of the flange plate; a first cover plate; a second cover plate; a spring retainer; and at least one fastening device. The spring retainer and the first plate substantially surround respective outer circumferences of the plurality of springs; and the at least one fastening device is for fixedly connecting the spring retainer to a torque-transmitting device. In one embodiment, the spring retainer is axially fixed by the connection to the torque-transmitting device and includes a first portion, and contact of the first portion with the first plate positions the first plate in a desired axial position with respect to the plurality of springs. In one embodiment, the spring retainer includes a plurality of protrusions and a circumferential end for each spring is in contact with a respective protrusion.

Abstract: A torsional vibration damper for a bridging clutch of a hydrodynamic clutch arrangement is provided with a drive-side transmission element and a takeoff-side transmission element, which can be deflected around a certain angle of rotation relative to the drive-side element against the action of energy storage devices, where at least one driver element with an actuating function is assigned to each energy storage device. To realize a multi-stage action of the energy storage device, at least some of these driver elements arrive in working connection with an assigned final turn of the corresponding energy storage device only after using up a predetermined clearance gap in the circumferential direction. For this purpose, at least one transmission element has openings to accommodate energy storage devices, and at least one circumferential boundary of each opening is provided as a driver element for the assigned energy storage device.

Abstract: A torsional vibration damper includes a plurality of coil springs which are each received in a pair of windows of respective takeoff side and drive side transmission elements. Each spring has a pair of opposed final turns separated by a plurality of intermediate turns, wherein each final turn is against a circumferential boundary of a respective window. Each final turn has a tip area which is in contact with an adjacent intermediate turn, the final turn being separated from the adjacent intermediate turn by a first distance which increases from the tip area to a maximum value within a predetermined angle ? following the tip area. This maximum value, in a load-free state of the springs, is essentially the same as a second distance separating adjacent intermediate turns.

Abstract: A drive coupling has an inner plate positioned within an inner periphery of an outer plate. The inner plate includes a plurality of outwardly-extending projections. The inner periphery of the outer plate includes a plurality of recesses. A plurality of short heavy-duty compression springs are arranged to compress in a substantially-straight linear direction between respective projections of the inner plate and the respective side wall of the recess of the outer plate. The springs are further retained by spring travel limiting guides which protrude from the outer plate. The inner plate and an associated central shaft are positively supported by bushings and/or bearings which reside in outer retaining plates. These bushings and/or bearings retain the inner and outer plates in a fixed non-yielding radial and axial position. Bolts are used to hold the outer drive plate and the external retaining plates together.

Abstract: A torsional vibration damping disk having receiving spaces for spring elements, particularly for bow spring elements, which are each arranged between two limit stop areas in the peripheral direction. In order to create a torsional vibration damping disk, which is producible easily and cost-effectively, the spring elements are each clamped with a slight pretension between two limit stop areas.

Abstract: In order to adapt the damping behavior at a wider range in a process for damping torsional vibrations and in a torsional vibration damper, the length of an elastic element can be changed in dependence on a relative angle between two rotational subassemblies, with the degree of change in length being variable in dependence on the relative angle. Furthermore, a thrust piston of a coupling element, which couples the two subassemblies, can be displaced in dependence on the relative angle, relative to a first one of the two subassemblies.

Abstract: A torsional vibration damper, particularly for use in the power train of a motor vehicle, employs one or more preferably arcuate coil springs having constant inner radii and one or more sets of neighboring smaller-diameter convolutions next to one or more sets of neighboring larger-diameter convolutions. The coil spring or springs is or are compressible by the retainers of two components which can turn, about a common axis, with and relative to each other and at least one of which defines a chamber for the coil spring(s). The retainers of the components can act upon the adjacent end convolutions of the coil spring or of two or more series-arranged coil springs between them by way of plastic slide elements and/or elastic bumpers.

Abstract: In a damper device of a lock-up clutch-equipped torque converter which has at least two rotating members that have a common rotation axis and are rotatable relatively to each other via an elastic member, an axial-direction support portion that supports the at least two rotating members in the direction of the rotation axis with respect to each other, and a radial-direction support portion that supports the rotating members in a radial direction with respect to each other are disposed on circumferences that are substantially equidistant from the rotation axis.

Abstract: A torsional vibration insulator for a drive train of a vehicle, in which a primary element and a secondary element can rotate relative to one another. At least two spring elements extend in an arc in a circumferential direction of the rotational axis and are each supported on a radial outer face by a radial support device. The length of the two spring elements, viewed in the circumferential direction, can be modified by rotating the primary element with respect to the secondary element. The radial support devices of the spring elements have multiple support elements which engage with the radial outer face of the spring elements and which are rotatably mounted in the circumferential direction in such a way that the support elements can be carried along with the spring elements in the circumferential direction when the length of the spring elements is modified, thereby eliminating frictional forces inhibiting rotational motion between the primary element and the secondary element.

Abstract: A torsional vibration damping device (1), in particular for a motor vehicle clutch, said device comprising a disc (60) and a support (80) mounted mobile in rotation relative to each other about a common main axis, and linked in rotation via circumferential elastic members (90) damping torsional vibrations, said elastic members being interposed between the disc (60) and the support (80) and maintained in position circumferentially via lugs (65) of the disc (60) and lugs (82,84) of the support (80) whereon are supported the elastic members (90) and radially via a guide ring (100) passing through the elastic members (90) and integral with the disc (60). Said device is characterised in that the lugs (82,84) of the support (80) are mounted on either side of a section of the ring (100) and the lugs (65) of the disc (60) can move freely at the angle between the lugs (82,84) of the support (80).

Abstract: A torsional vibration damper with at least two components that are rotatable relative to each other against the opposition of at least two deformable energy storing elements, such as arcuate coil springs. In order to at least reduce the noise that is generated by the damper, the energy storing elements are connected to each other by at least one coupling device that is designed to ensure that, when one of the energy storing elements is deformed, there results a controlled entrainment of the other energy storing element or elements.

Abstract: In order to adapt the damping behavior at a wider range in a process for damping torsional vibrations and in a torsional vibration damper, the length of an elastic element can be changed in dependence on a relative angle between two rotational subassemblies, with the degree of change in length being variable in dependence on the relative angle. Furthermore, a thrust piston of a coupling element, which couples the two subassemblies, can be displaced in dependence on the relative angle, relative to a first one of the two subassemblies.