A hydrokinetic torque coupling device comprises a casing rotatable about a rotation axis, a torque converter including an impeller wheel and a turbine wheel disposed in the casing coaxially with the rotation axis, a turbine hub disposed in the casing coaxially with the rotation axis and fixed to the turbine wheel, and a torsional vibration damper. The torsional vibration damper comprises a driven member fixed to the turbine hub, a drive member rotatable relative to the driven member about the rotation axis, and a plurality of circumferentially acting outer and inner elastic damping members. The drive member and the driven member are operatively connected to both the radially outer and inner elastic damping members. The radially outer and inner elastic damping members are arranged in series.

A torque converter is provided. The torque converter includes a damper assembly and a turbine assembly connected to the damper assembly. The turbine assembly includes an axially movable turbine piston, a spacer plate fixed to the turbine piston and a bias spring. The spacer plate retains the bias spring on the turbine piston with a preload force. A method of forming a torque converter is also provided. The method includes providing a bias spring contacting a front cover side surface of a turbine piston; and fixing a spacer plate to the turbine piston such that the spacer plate holds the bias spring against the front cover side surface of the turbine piston.

A hydrokinetic torque coupling device includes an impeller, a casing having a first engagement surface, a turbine-piston hydrodynamically drivable by the impeller, and a biasing device. The turbine-piston is hydrodynamically drivable by the impeller and includes a turbine-piston shell having a second engagement surface facing the first engagement surface. The turbine-piston is axially displaceable relative to the impeller between a hydrodynamic transmission mode and a lockup mode. The biasing device is configured to exert an axial load against the turbine-piston to urge the turbine-piston axially away from the lockup mode and towards the hydrodynamic transmission mode. The axial load exerted by the biasing device decreases as the turbine-piston moves axially towards the lockup mode and increases as the turbine-piston moves axially away from the lockup mode.

A hydrokinetic torque coupling device features an impeller, a casing having a first engagement surface, a damper assembly, a turbine-piston including a drive component with a second engagement surface, and a clutch plate having clutch plate engagement surfaces interposed between and axially movable relative to at least one of the first and second clutch plate engagement surfaces. The turbine-piston is axially displaceable relative to the casing to move the second engagement surface axially towards and away from the first engagement surface for positioning the hydrokinetic torque coupling device into and out of a lockup mode in which the first and second engagement surfaces and the clutch plate engagement surfaces frictionally interlock with one another to non-rotatably lock the casing relative to the input part of the damper assembly.

A torque converter includes an impeller, a turbine-piston hydrodynamically drivable by the impeller, a stator, and an annular lockup resistance member. The impeller includes an impeller shell. The turbine-piston includes a turbine-piston shell. The turbine-piston shell includes a turbine-piston flange having a first flange surface facing an engagement surface of the impeller shell. The turbine-piston is movable axially toward and away from the engagement surface to position the torque converter into and out of a lockup mode in which the turbine-piston flange is mechanically locked to the impeller shell. The annular lockup resistance member is in the form of an annular elastomeric sandwich washer coaxially aligned with the rotational axis and including turbine-side and stator-side members, and an elastomeric inner member sandwiched between the turbine-side and stator-side members.

A torque converter is provided that includes an impeller having an impeller shell with a first surface, an axially displaceable turbine-piston hydrodynamically drivable by the impeller and including a turbine-piston shell and a turbine-piston flange with a second surface, and a clutch plate interposed between and axially displaceable relative to at least one of the first and second surfaces. The turbine-piston is axially movable relative to the impeller to move the second surface of the turbine-piston flange towards and away from the first surface for positioning the torque converter into and out of a lockup mode in which the first and second surfaces and the clutch plate surfaces frictionally interlock with one another so that the impeller is mechanically locked to and non-rotatable relative to the turbine-piston.

A hydrokinetic torque converter comprises an impeller rotatable about a rotational axis, a coaxial turbine, and a stator disposed between the impeller and the turbine. The stator includes an annular stator hub, an annular radially outer stator rim, a plurality of stator blades radially outwardly extending between the stator hub and the stator rim, and an annular outer stator flange extending radially outwardly from the stator rim thereof and disposed between an impeller core ring and a turbine core ring. The stator further includes a plurality of hydraulic pressure grooves provided on at least one of axially opposite impeller and turbine side surfaces of the stator flange. The hydraulic pressure grooves face at least one of the impeller and turbine core rings so as to create a hydrodynamic lift between the stator and at least one of the impeller and turbine core rings in the axial direction.

A torque converter, including: an axis of rotation; a cover arranged to receive torque in a first circumferential direction for a drive mode; an impeller non-rotatably connected to the cover; a turbine in fluid communication with the impeller; a torque converter clutch including a piston; and a vibration damper including a cover plate connected to the torque converter clutch, an output flange and at least one spring engaged with the cover plate and the output flange. For a coast mode: the cover plate is arranged to rotate in a second circumferential direction opposite the first circumferential direction; the cover plate is arranged to displace the output flange in an axial direction; and the output flange is arranged to displace the piston in the axial direction.

A hydraulic power transmission device includes a front cover, a torque converter main body, a lock-up device, and a dynamic damper. The dynamic damper has a base plate, inertia rings and lid members that configure an inertial body, viscosity attenuation portions, and an elastic coupling portion. The base plate is fixed to an output plate. The inertial body can move in the rotation direction relative to the base plate. The viscosity attenuation portions can generate a variable hysteresis torque according to the relative speed difference between the base plate and the inertial body.

A damper assembly for a torque converter is provided. The damper assembly includes a first cover plate including a spring retainer at a radial outer end of the first cover plate supporting springs; and a second cover plate including, at a radial outer end thereof, tabs for the springs, the tabs being in circumferential spaces between the springs The spring retainer and the tabs are fixed together inside the spring retainer. A method of forming a damper assembly is also provided. The method includes fixing a spring retainer at a radial outer end of a first cover plate to tabs at a radially outer end of a second cover plate inside the spring retainer. The tabs are in circumferential spaces between springs retained by the spring retainer.