EXEDY CORPORATION

A torque fluctuation inhibiting device is disclosed. The torque fluctuation inhibiting device includes an input member, an elastic member, a mass body and a centrifugal element. The input member includes a pair of input plates disposed in axial alignment. The input member is disposed to be rotatable. The elastic member is held by the pair of input plates. 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 to be radially movable by a centrifugal force acting thereon in rotation of the input member. The centrifugal element is disposed between the pair of input plates.

A torque fluctuation inhibiting device includes first and second rotatable rotors, a centrifugal element and a cam mechanism. The first rotor includes an accommodation portion. The second rotor is rotatable with and relative to the first rotor. The centrifugal element is disposed in the accommodation portion to be radially movable, and receives a centrifugal force generated by rotation of the first or second rotor. The cam mechanism receives the centrifugal force acting on the centrifugal element, and converts the centrifugal force into a circumferential force directed to reduce rotational phase difference between the first and second rotors. The cam mechanism includes a cam surface provided on the centrifugal element, and a cam follower which contacts the cam surface. The cam follower transmits a force therethrough between the centrifugal element and the second rotor. The centrifugal element is radially moved while rolling on an inner wall surface of the accommodation portion.

A lock-up device includes a clutch part and a damper part. The clutch part is disposed between a front cover and a turbine, and transmits or blocks torque. The damper part transmits torque from the clutch part to the turbine, and absorbs torsional vibration. The damper part includes input and output members, elastic members, and a support member. The input member is connected to the clutch part. The output member is connected to the turbine. The elastic members connect the input and output members. The support member has a connecting part, a regulating part, and a stopper part. The regulating part is provided such that the output member is interposed axially between the regulating part and part of the input member. The stopper part is configured to contact the output member and prohibit the input and output members from rotating relative to each other by a predetermined angle or more.

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 converter includes a front cover, an impeller, a turbine, and a stator. The impeller forms a fluid chamber together with the front cover. The stator is disposed between an inner peripheral part of the impeller and an inner peripheral part of the turbine. The stator regulates a flow of a fluid flowing from the turbine to the impeller. A flattening ratio is 0.5 or less. The flattening ratio is herein defined as a first ratio of an axial dimension to a radial dimension of a torus formed by the impeller, the turbine, and the stator. A flow area ratio is 0.14 or greater and 0.16 or less. The flow area ratio is herein defined as a second ratio of a minimum flow area of the impeller and the turbine to an area of an imaginary circle having the outer diameter of the torus as the diameter thereof.

A lock-up device includes a clutch part and a damper part. The clutch part is disposed between a front cover and a turbine, and transmits or blocks torque. The damper part transmits torque from the clutch part to the turbine, and absorbs torsional vibration. The damper part includes input and output members, elastic members, and a support member. The input member is connected to the clutch part. The output member is connected to the turbine. The elastic members connect the input and output members. The support member has a connecting part, a regulating part, and a stopper part. The regulating part is provided such that the output member is interposed axially between the regulating part and part of the input member. The stopper part is configured to contact the output member and prohibit the input and output members from rotating relative to each other by a predetermined angle or more.

A power transmission device includes an electric motor, and a torque converter connected to the electric motor to transmit torque. A torque converter characteristic line is determined based on a capacity coefficient of the torque converter and indicates torque of the torque converter relative to each rotational speed of the torque converter. An electric motor characteristic line indicates a maximum output torque of the electric motor relative to each rotational speed of the electric motor. A first range corresponds to a range equal to and greater than a base rotational speed of the electric motor and equal to or less than a first average rotational speed, which is an average of the base rotational speed and a maximum rotational speed of the electric motor. The capacity coefficient is such that the characteristic line for the torque converter intersects the characteristic line for the electric motor in the first range.

A torque converter includes a torque converter body and a rotary electrical machine. The torque converter body includes a cover, an impeller, a turbine, and a first stator. The rotary electrical machine includes a rotor and a second stator. The rotary electrical machine is disposed inside the torque converter body.

The present device includes an inertia ring, a plurality of centrifugal elements, a plurality of cam mechanisms and a plurality of restriction mechanisms. The inertia ring is disposed to be rotatable with a hub flange and be rotatable relatively to the hub flange. Each centrifugal element is disposed to receive a centrifugal force generated by rotation of the hub flange and the inertia ring. When a relative displacement is produced between the hub flange and the inertia ring in a rotational direction while the centrifugal force is acting on each centrifugal element, each cam mechanism converts the centrifugal force into a circumferential force directed to reduce the relative displacement. Each restriction mechanism allows actuation of each centrifugal element by each cam mechanism, and restricts radial movement of each centrifugal element.

A lock-up device for a torque converter is disclosed. The lock-up device includes a clutch part, first and second rotary members, a plurality of elastic members and a stopper mechanism. The clutch part is provided between a front cover and a turbine, and transmits the torque inputted to the front cover to the turbine. The first rotary member is disposed between the clutch part and the turbine. The second rotary member is rotatable relative to the first rotary member. The elastic members elastically couple an outer peripheral part of the first rotary member and an outer peripheral part of the second rotary member in a rotational direction. The stopper mechanism is disposed axially between the elastic members and an outer peripheral part of a turbine shell. The stopper mechanism includes an engaging portion restricting an angular range of relative rotation between the first rotary member and the second rotary member.