Abstract: A damper device is provided with a first rotating body, a second rotating body, a coil spring and a spring seat. The coil spring is interposed in a circumferential direction between the first and second rotating bodies. The resin spring seat includes a metallic core member inside. The resin spring seat has a seat portion and an overhang portion. The metallic core member has an overhang metallic core part that has a low-rigidity portion and a high-rigidity portion. The low-rigidity portion is provided on a side close to the seat portion with a relatively lower rigidity. The high-rigidity portion is provided on a side far from the seat portion with a relatively higher rigidity.

Abstract: A lock-up device includes a clutch part, an input plate, an outer peripheral side damper part, an output plate, an inner peripheral side damper part, and an intermediate member. The outer peripheral side damper part includes at least two outer peripheral side springs. The outer peripheral side springs are disposed in a circumferential alignment, act in series, and take circular-arc shapes when in a free state. The inner peripheral side damper part includes at least two inner peripheral side springs. The inner peripheral side springs are disposed in a circumferential alignment on an inner peripheral side of the outer peripheral side damper part, and act in series. The intermediate member is rotatable relatively to the input plate and the output plate, and makes the outer peripheral side damper part and the inner peripheral side damper part act in series.

Abstract: A seat member includes a pressing part to be pressed by at least either of a first rotary member and a second rotary member. The seat member also includes a sliding part. The seat member is disposed to be changeable in posture between a first posture and a second posture, the first posture causing a radially outer part of the pressing part to be contacted to the at least either of the first rotary member and the second rotary member when an absolute value of a rotational angle of the second rotary member with respect to the first rotary member is less than a predetermined value, the second posture causing the sliding part to partially slide against the first rotary member when the absolute value of the rotational angle of the second rotary member with respect to the first rotary member is greater than or equal to the predetermined value.

Abstract: A lock-up device for a torque converter is disposed between a front cover coupled to an engine-side member and a torque converter body and directly transmits a torque from the front cover to a turbine of the torque converter. The lock-up device includes a clutch portion to transmit the torque from the front cover to an output side. The lock-up device includes an intermediate member in a power transmission path between the clutch portion and the turbine. An input-side damper mechanism mounted between the clutch portion and the intermediate member attenuates variation in rotational speed. An output-side damper mechanism mounted between the intermediate member and the turbine generates a hysteresis torque larger than a hysteresis torque of the input-side damper mechanism and attenuates variation in rotational speed. The lock-up device also includes a dynamic damper device coupled to the intermediate member and that attenuates variation in rotational speed.

Abstract: An output rotary member is coupled to a turbine and rotatable relatively to a clutch portion. First elastic members elastically and rotation-directionally couple the clutch portion and the output rotary member. A dynamic damper device is coupled to any of members forming a power transmission path from the clutch portion to the output rotary member and includes a damper plate having a plurality of circumferentially extending first openings and to be rotated together with the output rotary member. The dynamic damper device also includes inertia members disposed on both axial sides of the damper plate and rotatable relatively to the damper plate, each of the inertia members having circumferentially extending second openings located to oppose the first openings. The dynamic damper device further includes second elastic members accommodated in the first openings and the second openings, the second elastic members elastically coupling the damper plate and the inertia members.

Abstract: A power transmission apparatus, which is disposed on a power transmission path from an output shaft of an internal combustion engine to a transmission in a vehicle, is provided with a rotating electrical machine including a rotor and a stator. The rotor is coupled to a synchronous rotating member that rotates synchronously with the output shaft of the internal combustion engine, and takes a central axis of the output shaft of the internal combustion engine as a rotating shaft. The stator is fixed to a fixing member on a non-rotating side with respect to the synchronous rotating member, and faces the rotor with a first gap therebetween.

Abstract: A lock-up device for a torque converter includes a piston, a clutch part, a first hydraulic chamber, a second hydraulic chamber, a first hydraulic port and a second hydraulic port. The first hydraulic chamber is formed on a piston side of the front cover. The second hydraulic chamber is formed independently from the first hydraulic chamber. The first hydraulic port is in communication with the first hydraulic chamber. The second hydraulic port is formed independently from the first hydraulic port, and a portion of the second hydraulic chamber is in communication with the second hydraulic port. The first hydraulic chamber is sealed with the exception of a portion of the first hydraulic chamber that is in communication with the first hydraulic port. The second hydraulic chamber is sealed with the exception of the portion of the second hydraulic chamber that is in communication with the second hydraulic port.

Abstract: An axial-direction space can be made more compact while widening a damper twisting angle of a lockup device such that a damper characteristic can be further improved. This torque converter comprises a torque converter main body and a lockup device. The lockup device has a plurality of outer peripheral-side torsion springs and a plurality of inner peripheral side torsion springs. The outer peripheral-side torsion springs are arranged along a circumferential direction at an attachment diameter. The inner peripheral-side torsion springs are arranged along a circumferential direction at a second attachment diameter radially inward of the outer peripheral torsion springs and operate in series with the outer peripheral torsion springs. Also, the attachment diameter is equal to or larger than an outer diameter of a torus, and the attachment diameter is equal to or smaller than an inner diameter of the torus.

Abstract: A vehicular fluid power transmitting device includes a pump impeller, a turbine runner, a damper device, a set member, and a centering member. The pump impeller has a pump shell to which torque from a drive source is input. The damper device has a damper input member and a damper output member. The damper input member is connected to an output shaft of the drive source. The damper output member is connected to the pump shell. The set member is fixed to the pump shell, and is connected to the damper output member. Also, the centering member is provided protruding toward the pump shell from the output shaft of the drive source, and is fitted together with the damper input member.

Abstract: A lock-up device for a torque converter is provided in which torsion springs are appropriately compressed and deformed even when the torsion springs to be used have a shape elongated in a circumferential direction of the lock-up device. The lock-up device includes a drive plate, torsion springs and a driven plate. The drive plate has a fixation part, a plurality of torque transmission parts and a plurality of receiver parts. The fixation part is fixed to a piston. The plural torque transmission parts are formed to extend from the fixation part to an outer peripheral side and contact rotation-directional ends of the torsion spring. The plural receiver parts are formed on an outer peripheral part of the fixation part, support the inner peripheral side parts of the torsion springs on an engine side with respect to the axial centers of the torsion springs, and extend toward a transmission.

Abstract: A torque converter includes a torque converter body, a lock-up device, and a dynamic damper. The lock-up device includes an output plate coupled to a turbine. The dynamic damper is fixed to the output plate of the lock-up device, and is configured to attenuate variation in speed of rotation from the engine. The dynamic damper includes a base plate, an inertia unit, and an elastic unit. The base plate is fixed to the output plate. The inertia unit is movable relative to the base plate in a rotational direction. The elastic unit exerts nonlinear torsional characteristics, and elastically couples the base plate and the inertia unit in the rotational direction.

Abstract: Occurrence of secondary resonance in a dynamic damper device of a lock-up device is inhibited to improve effectiveness of the dynamic damper device. The lock-up device includes a drive plate, a driven plate coupled to a turbine, an intermediate member, a plurality of outer peripheral side and inner peripheral side torsion springs, and a dynamic damper device. The intermediate member is disposed between the outer peripheral side torsion springs and the inner peripheral side torsion springs. The outer peripheral side torsion springs elastically couple the drive plate and the intermediate member in a rotational direction. The inner peripheral side torsion springs elastically couple the intermediate member and the driven plate in the rotational direction. The dynamic damper device includes an inertia ring coupled to the intermediate member.

Abstract: A damper device includes a first rotary member, a second rotary member, a plurality of coil springs, an intermediate member and a positioning structure. The first rotary member is a member into which a power of an engine is inputted. The second rotary member is disposed to be rotatable with respect to the first rotary member. The plurality of coil springs are configured to be compressed between the first rotary member and the second rotary member. The intermediate member is engaged with the plurality of coil springs and couples the plurality of coil springs together. The positioning structure radially positions the intermediate member with respect to at least either of the first rotary member and the second rotary member on an inner peripheral side.

Abstract: A flywheel assembly includes a first rotary member, a second rotary member, a first coil spring, a second coil spring, an intermediate plate, a first stopper mechanism and a first contact relief member. The first coil spring is configured to be compressed between the first rotary member and the second rotary member. The second coil spring is configured to be compressed between the first rotary member and the second rotary member and has a stiffness greater than a stiffness of the first coil spring. The intermediate member is engaged with the first coil spring and the second coil spring and couples the first coil spring and the second coil spring in series. The first stopper mechanism is configured to deactivate the first coil spring. The first contact relief member is movably disposed inside the first coil spring and is capable of relieving the contact in the first stopper mechanism during activation of the first coil spring.

Abstract: A torque fluctuation absorbing apparatus is capable of securely sealing a space housing an elastic member even on application of a centrifugal force or at the time of cooling. The torque fluctuation absorbing apparatus includes a center plate, a side plate(s) (side plate assembly) coaxial with the center plate and slidably relative to the center plate, and an elastic member housed within a space delimited by the side plate assembly to absorb torque fluctuations between the side plate assembly and the center plate. The apparatus also includes a cover member secured to the center plate and slidably pressure contacted with the side plate assembly to cover from outside a space housing the elastic member, and a suppressing section capable of suppressing the cover member from deforming under a pressure acting on the cover member when atmospheric pressure within the space housing the elastic member(s) becomes lower than outside atmospheric pressure.

Abstract: A vehicular fluid power transmitting device has a pump impeller, a turbine runner, damper device, an annular set member and a bearing assembly. The pump impeller has a pump shell. The damper device is provided between a drive source and the pump shell in an axial direction of an output shaft, and has a damper input member that is connected to the drive source, and a damper output member that is connected to the pump shell. The damper output member is connected to the annular set member that is fixed to the pump shell. The damper input member is relatively rotatably supported via the bearing assembly by the annular set member.

Abstract: A lock-up device for a fluid coupling suppresses vibration caused by coil springs. The lock-up device includes an input rotation member, an output rotation member, a plurality of sets of first elastic members, and a float member. The plurality of sets of first elastic members are compressed in a rotational direction by the relative rotation between the input rotation member and the output rotation member. The float member float member is configured to restrict movement of the plurality of sets of first elastic members in a radial direction.

Abstract: It is intended to inhibit variation in output-side rotation in a wide rotational speed range even when a lock-up rotational speed is set to be low. The present lock-up device includes: a piston configured to be pressed onto a front cover; an output-side unit disposed to be unitarily rotatable with a turbine; and a first torsion spring elastically coupling the piston and the output-side unit. The output-side unit includes: an output member fixed to the turbine; an inertia member disposed to be rotatable relatively to the output member; a second torsion spring elastically coupling the inertia member and the output member; and a hysteresis torque generating mechanism. The hysteresis torque generating mechanism is configured to generate variable hysteresis torque while being disposed between the inertia member and the output member.

Abstract: A clutch cover assembly is provided whereby accurate wear compensation can be executed. The present clutch cover assembly includes a clutch cover, a pressure plate, a diaphragm spring, an wear-amount detecting mechanism and an wear tracking mechanism. The wear-amount detecting mechanism includes a detection member for detecting the wear-amount of a friction member and a moving member configured to be movable in accordance with the wear-amount of the friction member. The detection member is engaged with the fulcrum rings and detects the wear-amount through the fulcrum rings, while being engaged with the moving member and being configured to be disengaged from the moving member at a predetermined wear-amount.

Abstract: A lock-up device is disposed between a front cover and a turbine in a torque converter to mechanically connect the front cover and the turbine. The lock-up device includes a clutch part and a release part. The clutch part is disposed in a power transmission path from the front cover to the turbine and is configured to be in a clutch-on state of transmitting a power from the front cover to the turbine in a set posture. The release part is configured to be actuated by a hydraulic pressure being increased in a space on a turbine-side of the piston to turn the clutch part from the clutch-on state to a clutch-off state and to block transmission of the power from the front cover to the turbine.