The present invention discloses a torque converter for a vehicle that may be applied as a torque converter having a torsional damper and has a driven plate which is formed with curved portions, and springs which are disposed in a longitudinal direction and apply elasticity to the curved portions, thereby increasing a limitation on an operating radius of the torsional damper and implementing low rigidity and a wide angle.

A torque converter for a vehicle according to the present invention includes: a front cover; an impeller which is coupled to the front cover and rotates together with the front cover; a turbine which is disposed at a position facing the impeller; a reactor which is positioned between the impeller and the turbine and changes a flow of oil flowing from the turbine to the impeller; a lock-up clutch which has a piston that directly connects the front cover and the turbine; and a torsional damper which includes a pair of retaining plates that receives driving power of an engine from the turbine or the lock-up clutch, and a driven plate that is disposed between the retaining plates, the torsional damper being coupled to the lock-up clutch and absorbing impact and vibration applied in a rotation direction; in which multiple spring assembly seating portions are formed in the retaining plates, spring assemblies are disposed in the multiple spring assembly seating portions so as to impart elasticity in a direction from a circumference of the torsional damper to an rotation axis, the driven plate has an approximately circular plate shape, multiple curved portions and multiple edge portions are formed on an outer circumferential surface of the driven plate, each of the curved portions has a curvature that is more gradual than an imaginary circumference defined by a maximum diameter of the driven plate, and the spring assemblies are in contact with the curved portions to apply elasticity to the curved portions.

A torque converter is provided. The torque converter includes a stator including a body and a plurality of blades on an outer circumferential surface of the body and an impeller including an impeller shell. The impeller shell includes at least one protrusion aligned for contacting an axially extending surface of the body of the stator to center the stator on the impeller during assembly. A method of forming a torque converter is also provided. The method includes forming an impeller shell to include at least one protrusion on a stator facing surface thereof; providing a stator including a body and a plurality of blades on an outer circumferential surface of the body; and centering the stator on the impeller shell by contacting the at least one protrusion with an axially extending surface of the body.

A hydrokinetic torque-coupling device comprises an impeller wheel, a turbine wheel drivable by the impeller wheel, a torsional vibration damper, and a turbine hub non-rotatably connected to the turbine wheel. The turbine wheel includes a turbine shell and at least one coupling pin formed integrally with the turbine shell and extending radially outwardly from the turbine shell. The torsional vibration damper comprises a first damper, a driven member rotatable relative to the first damper retainer, and damper elastic members interposed between the first damper retainer and the driven member. The turbine hub is non-rotatably coupled to the driven member of the torsional vibration damper. The first damper retainer has at least one angularly extending bayonet slot configured to receive the at least one coupling pin therein such that the at least one coupling pin being angularly moveable in the at least one bayonet slot relative to the first damper retainer.

A power transmission device is disclosed. The power transmission device includes a housing, a clutch unit, a heat conducting unit, and a heat conducting unit. The housing includes a wall portion. The housing is rotatably disposed, with the torque from the drive source being transmitted to the housing. The wall portion has a through hole formed therein. The clutch unit includes a friction surface engageable with the housing and disposed opposite to the through hole. The clutch unit is disposed in the housing so as to be rotatable relative to the housing. The heat conducting unit is disposed in the through hole and exposed in the housing. The temperature detecting unit is configured to detect a temperature of the heat conducting unit.

A damper assembly includes a driven plate, an intermediate plate, and elastic drive elements. The intermediate plate includes a radially outer base wall and opposite side walls. The elastic drive elements are interposed, between tabs of the driven plate and tabs of the intermediate plate to permit relative rotational movement therebetween. The elastic drive elements reside in cavities defined, in part, by a substantially annular radially inwardly facing surface of the intermediate plate. A first region of the radially inwardly facing surface in closest proximity to the elastic drive elements has a first radius. A second region of the radially inwardly facing surface axially interposed between the first region and the first side wall has a second radius that is greater than the first radius.

A hybrid assembly, including: a torque converter; a shaft; a hybrid module; and a module hub. The torque converter includes: a cover; an impeller; a turbine; a stator; and an output hub arranged to non-rotatably connect to a transmission input shaft. The shaft is arranged to receive torque and includes a channel. The hybrid module includes: an electric motor including a stator and a rotor non-rotatably connected to the cover; and a transfer clutch arranged to control transmission of the torque from the shaft to the cover. The hub is non-rotatably connected to the cover and includes a channel: connected to the torque converter; and arranged to receive first pressurized fluid from a first channel in the transmission input shaft. The channel of the shaft is arranged to receive second pressurized fluid, from a second channel in the transmission input shaft, to control operation of the transfer clutch.

An impeller for a torque converter is provided. The impeller includes an impeller shell including an inner circumference, an outer circumference and a radial extension extending radially outward from the inner circumference. The radial extension includes an axially extending groove formed therein. The impeller also includes an impeller hub welded to the impeller shell by a weld. The weld is radially inside of the axially extending groove. A method of forming an impeller for a torque converter is also provided.

A lock-up device includes an input-side rotary member, an output-side rotary member, an outer peripheral side torsion spring, a restriction member and a float member. The restriction member is attached to the output-side rotary member. The restriction member includes a first restriction part. The first restriction part is disposed at an interval from the output-side rotary member in an axial direction. The float member is rotatable relatively to the input-side rotary member and the output-side rotary member. An inner peripheral end of the float member is disposed between the output-side rotary member and the first restriction part in the axial direction.

A front cover assembly is disclosed. The front cover assembly includes a front cover body having a disc shape and a hub having a tubular shape. The front cover body includes a tubular portion in a center part thereof. The tubular portion is closed at one end thereof. The hub includes an engaging portion integrated with at least part of an outer peripheral surface thereof. The hub includes a coupling portion configured to extract power on an inner peripheral surface thereof. The engaging portion is press-fitted to the tubular portion of the front cover body.

A lock-up device includes a clutch disc, a piston, a temperature detection member and a gap adjustment mechanism. The clutch disc is disposed between a front cover and a turbine. The piston is disposed in opposition to the front cover through the clutch disc so as to be movable in an axial direction, and presses the clutch disc toward the front cover. The deformation amount of the temperature detection member is adjusted in accordance with surrounding temperatures. In accordance with the deformation amount, the gap adjustment mechanism adjusts a gap between the front cover and the piston to be a first gap at a first temperature. Further, in accordance the deformation amount, the gap adjustment mechanism adjusts the gap between the front cover and the piston to be a second gap narrower than the first gap at a second temperature higher than the first temperature.