A centrifugal pendulum includes a first support plate, being able to rotate around a rotation axis; a second support plate, facing the first support plate in the axial direction and fixed to the first support plate. A mass is disposed between the first support plate and the second support plate in the axial direction. The first support plate has a first protrusion extending axially, and the first protrusion is integrally formed with the first support plate and defines a first track. The mass has a through hole extending axially, and the through hole defines a second track. The first protrusion extends into said through hole such that the first track faces the second track in the radial direction. A roller is disposed between the first track and the second track in the radial direction, and is capable of rolling against the first track and the second track, such that the mass is able to move relative to the first and second support plates and apply a torque onto the first and second support plates. The present invention also discloses a torque transmitting device comprising the centrifugal pendulum and a vehicle.

A torque fluctuation inhibiting device is disclosed. The torque fluctuation inhibiting device includes an elastic member, an input member, a mass body and a centrifugal element. The input member is a member to which a torque is inputted through the elastic member. The input member is disposed to be rotatable. The mass body is disposed to be rotated with the input member and be rotatable relative to the input member. The centrifugal element is disposed radially outside the elastic member. The centrifugal element is disposed to be radially movable by a centrifugal force acting thereon in rotation of the input member.

A torque transmission arrangement for a powertrain of a motor vehicle includes an input and an output. A torque path runs from the input to the output. A torsional vibration damping unit is positioned first, followed by a gear unit, along the torque path between the input and the output. A first slip arrangement and/or a second slip arrangement for generating a speed slip are/is provided in the torque path between the input and the output for vibration damping.

A power transmission device is disclosed. The power transmission device includes an input member, an output member, a dynamic vibration absorbing device, a rotation fluctuation detecting unit, and a control unit. The input member is rotatably disposed and configured to receive the torque inputted from a drive source. The output member is configured to output the torque, inputted to the input member, to a drive wheel. The dynamic vibration absorbing device is disposed in a power transmission path including the input member and the output member. The rotation fluctuation detecting unit is configured to detect information regarding a rotational fluctuation in at least one of the input member and the output member. The control unit is programmed to perform active control of the dynamic vibration absorbing device so as to reduce the rotational fluctuation based on the information regarding the rotational fluctuation detected by the rotational fluctuation detecting unit.

A torque fluctuation inhibiting device is disclosed. The torque fluctuation inhibiting device includes an elastic member, an input member, a mass body and a centrifugal element. The input member is a member to which a torque is inputted through the elastic member. The input member is disposed to be rotatable. The mass body is disposed to be rotated with the input member and be rotatable relative to the input member. The centrifugal element is disposed radially outside the elastic member. The centrifugal element is disposed to be radially movable by a centrifugal force acting thereon in rotation of the input member.

A torque fluctuation inhibiting device includes a mass body, a centrifugal element and a cam mechanism. The mass body is disposed in alignment with a rotor in an axial direction, and is rotatable relatively to the rotor. The cam mechanism includes a cam and a cam follower. When relative displacement occurs between the rotor and the mass body due to a centrifugal force that acts on the centrifugal element, the cam mechanism converts the centrifugal force into a circumferential force directed to reduce the relative displacement. Guide parts are provided on both ends of the centrifugal element. Each guide part makes contact with a member adjacent thereto in an opposite position to a contact point between the cam and the cam follower through a center of gravity of the centrifugal element when the relative displacement occurs between the rotor and the mass body in the rotational direction.

According to one embodiment, a damper device includes a rotator, a first oscillator, a second oscillator, and two rollers, for example. The rotator is provided with a first opening. The second oscillator includes two guide surfaces recessed in a direction closer to a first center of rotation and a transmitting part capable of moving along the first opening. The two rollers each include a ring supported by the first oscillator and a shaft extending along a second center of rotation inside the ring and rotatably supported by the ring. The shaft comes into contact with a corresponding one of the two guide surfaces of the second oscillator pushed outward in the radial direction by centrifugal force, rolls along the corresponding one of the two guide surfaces by oscillation of the first oscillator, and is pushed by the corresponding one of the two guide surfaces in the circumferential direction.

A centrifugal pendulum includes a first support plate, being able to rotate around a rotation axis; a second support plate, facing the first support plate in the axial direction and fixed to the first support plate. A mass is disposed between the first support plate and the second support plate in the axial direction. The first support plate has a first protrusion extending axially, and the first protrusion is integrally formed with the first support plate and defines a first track. The mass has a through hole extending axially, and the through hole defines a second track. The first protrusion extends into said through hole such that the first track faces the second track in the radial direction. A roller is disposed between the first track and the second track in the radial direction, and is capable of rolling against the first track and the second track, such that the mass is able to move relative to the first and second support plates and apply a torque onto the first and second support plates. The present invention also discloses a torque transmitting device comprising the centrifugal pendulum and a vehicle.

A hybrid vehicle having a pendulum damper in which resonance at around an idling speed of an engine can be prevented to improve N.V. performance. The hybrid vehicle comprises an engine and at least one motor. In the hybrid vehicle, a power transmission path is formed between the engine and drive wheels. In the power transmission path, a pendulum damper is disposed to suppress torsional vibrations, and a disconnecting clutch is disposed to selectively interrupt power transmission between the engine and the pendulum damper.

A power transmission device is disclosed. The power transmission device includes an input member, an output member, a dynamic vibration absorbing device, a rotation fluctuation detecting unit, and a control unit. The input member is rotatably disposed and configured to receive the torque inputted from a drive source. The output member is configured to output the torque, inputted to the input member, to a drive wheel. The dynamic vibration absorbing device is disposed in a power transmission path including the input member and the output member. The rotation fluctuation detecting unit is configured to detect information regarding a rotational fluctuation in at least one of the input member and the output member. The control unit is programmed to perform active control of the dynamic vibration absorbing device so as to reduce the rotational fluctuation based on the information regarding the rotational fluctuation detected by the rotational fluctuation detecting unit.