A torque converter, including: a cover arranged to receive torque; an impeller; a turbine; a stator; and a lock-up clutch including a piston plate, a first plate, a second plate axially disposed between the cover and the first plate, and a rivet non-rotatably connecting the first plate to the second plate, the rivet being a component distinct from the first plate and the second plate. The cover and the piston plate define at least a portion of a first pressure chamber. The first plate and the second plate define at least a portion of a second pressure chamber. The first pressure chamber and the second pressure chamber are arranged to receive and expel a fluid to axially displace the piston plate to open and close the lock-up clutch.

A torque converter comprising: a damper assembly including a spring retainer; and, a turbine assembly connected to the damper assembly, the turbine assembly including: a turbine shell including an axially movable turbine piston; a drive plate fixed to the turbine piston; and a diaphragm spring, the drive plate having openings for receiving the diaphragm spring; the diaphragm spring acting on the turbine piston with a preload force. In an example aspect, the diaphragm spring includes a plurality of radially inward tabs and the drive plate includes a plurality of openings for receiving the radially inward tabs.

An electric motor includes a rotor rotatable about a center axis; and a rotor carrier including an outer circumferential surface having a varying diameter defined by radially inner surface sections and radially outer surface sections. The radially outer surface sections are bonded to an inner circumferential surface of the rotor by an adhesive. A hybrid module configured for arrangement in the torque path upstream from a transmission and downstream from an internal combustion engine includes the electric motor and a torque converter including a front cover. The rotor carrier is fixed to the front cover.

A torque converter may include: an impeller and a turbine hub to form a chamber together, a damper piston connected to a damper clutch and divide the chamber into a damper chamber and a balance chamber, a discharge path to connect and block the balance chamber and control an internal flow rate of the torque converter, and an O-ring to open or close the discharge path.

A torque converter, including: a cover; a lock-up clutch with a piston plate; an output hub; a first hub including a through-bore; a chamber bounded by the turbine; an apply chamber bounded by the piston plate; a release chamber bounded by the cover, the first hub, and the piston plate; a first flow path; a through-bore through the first hub; and a second flow path. The second flow path: is sealed from the first chamber; passes through the through-bore; and includes a portion circumferentially aligned with the first flow path. A line in an axial direction passes through the through-bore without intersecting the first hub. For a lock-up mode, pressurized fluid in the apply chamber displaces the piston plate in a first axial direction. For a torque converter mode, pressurized fluid in the release chamber displaces the piston plate in a second axial direction.

A drive member of a damper device includes a first input plate member and a second input plate member that rotatably support a plurality of pinion gears of a planetary gear of a rotary inertia mass damper. A driven member includes an outer teeth gear portion that meshes with the pinion gear in an outer circumferential portion thereof and is disposed between the first and the second input plate members in an axial direction so as to work as a sun gear of the planetary gear. A stopper is configured to restrict the relative rotation between the drive member and the driven member and includes a contact portion arranged in the outer circumferential portion of the driven member so as to contact with the first input plate member.

A hydrokinetic torque-coupling device for coupling driving and driven shafts. The torque-coupling device includes a casing, an impeller wheel and a turbine wheel hydrodynamically drivable by the impeller wheel, and a lock-up clutch. The lock-up clutch includes a lockup piston axially movable toward and away from the casing, a first disc carrier non-movably secured to the casing, a second disc carrier radially offset from the first disc carrier and drivingly coupled to the turbine wheel, at least one drive disc non-rotatably and axially movably mounted to the first disc carrier, at least one driven disc non-rotatably and axially movably mounted to the second disc carrier and disposed adjacent to the at least one drive disc so as to define a clutch pack, and a clutch biasing spring disposed between the casing and the clutch pack so as to bias the clutch pack toward the lockup piston.

In a frictional coupling device of a vehicular power transmitting system, includes: first and second rotary members; a frictional coupling portion, and a piston disposed movably in a direction of the axis to press the frictional coupling portion, a spacing distance between adjacent spline teeth of the radially outer splined portion in a rotating direction thereof decreases along the direction of the axis in which the friction discs are brought into the spline engagement with the radially outer splined portion during assembling of the friction discs with respect to the first rotary member, and/or a spacing distance between adjacent spline teeth of the radially inner splined portion in a rotating direction thereof decreases along the direction of the axis in which the friction plates are brought into the spline engagement with the radially inner splined portion during assembling of the friction plates with respect to the second rotary member.

A lock-up device includes a clutch portion, a piston, a sleeve and an oil chamber plate. The clutch portion is disposed between the front cover and a turbine. The piston is movable in an axial direction. The piston turns the clutch portion into a torque transmission state. The sleeve is fixed to a front cover and includes an outer peripheral surface and a protrusion. The outer peripheral surface supports an inner peripheral surface of the piston such that the piston is movable in the axial direction. The protrusion has an annular shape and protrudes radially outward from the outer peripheral surface. The oil chamber plate has a disc shape and is joined to a piston-side lateral surface of the protrusion of the sleeve. The oil chamber plate defines an oil chamber together with the piston therebetween. The oil chamber is supplied a hydraulic oil for activating the piston.

A torque converter that is downsized in an axial direction utilizing existing space is provided. A pump impeller, a turbine runner, a lockup clutch, an elastic damper, and a planetary unit are held in a housing. A torsional vibration damping device is arranged concentrically with the lockup clutch. An input element is arranged concentrically with the lockup clutch while being connected to the lockup clutch and a drive member. An output element is connected to a driven member.