A method for controlling an electric drive unit (EDU) having a motor-driven torque converter includes receiving a request signal indicative of a requested output torque of the EDU, and operating the motor at a target motor speed using the requested output torque. The target motor speed minimizes system losses while achieving the requested output torque. When the requested output torque remains below a calibrated threshold and a turbine speed is less than a corner speed of the motor, a torque converter clutch (TCC) transitions to or remains in a locked state. The controller commands the TCC to transition to an unlocked state to reach the target motor speed, thereby selectively enabling torque multiplication. A powertrain system includes a driven load and the EDU. A computer readable storage medium may include executable instructions for performing the method.

A torque converter comprising: an axis of rotation; a first seal at a first radial distance relative to the axis of rotation; a second seal at a second radial distance relative to the axis of rotation; an impeller shell and a balancing plate defining at least a portion of a first hydraulic chamber; a piston plate sealed via the first seal to the balancing plate defining at least a portion of a second hydraulic chamber; a cover sealed to the piston plate via the second seal defining at least a portion of a third hydraulic chamber. A clutch plate is radially outward relative to the balancing plate. The sealing arrangement, effective at preventing drift-on or drift-off of the clutch due to dynamic pressure, features a first radial distance that is the same or equal to the second radial distance.

A torque converter comprising: an axis of rotation; a first seal at a first radial distance relative to the axis of rotation; a second seal at a second radial distance relative to the axis of rotation; an impeller shell and a balancing plate defining at least a portion of a first hydraulic chamber; a piston plate sealed via the first seal to the balancing plate defining at least a portion of a second hydraulic chamber; a cover sealed to the piston plate via the second seal defining at least a portion of a third hydraulic chamber. A clutch plate is radially outward relative to the balancing plate. The sealing arrangement, effective at preventing drift-on or drift-off of the clutch due to dynamic pressure, features a first radial distance that is the same or equal to the second radial distance.

A torque converter, including: a cover arranged to receive torque; an impeller including an impeller shell non-rotatably connected to the cover; a turbine in fluid communication with the impeller and including a turbine shell; a stator at least partially located between the impeller and the turbine; and including a body portion with at least one stator blade and a first frusto-conical surface; a stator cone clutch including the first frusto-conical surface and a flange including a second frusto-conical surface; and a first thrust bearing axially disposed between the stator cone clutch and the impeller shell. In a stator locked mode: the body portion and the flange are non-rotatably connected; and the stator cone clutch is arranged to urge the first thrust bearing against the impeller shell in a first axial direction.

A torque converter, including: a cover arranged to receive torque; an impeller including an impeller shell non-rotatably connected to the cover; a turbine in fluid communication with the impeller and including a turbine shell; a stator at least partially located between the impeller and the turbine; and including a body portion with at least one stator blade and a first frusto-conical surface; a stator cone clutch including the first frusto-conical surface and a flange including a second frusto-conical surface; and a first thrust bearing axially disposed between the stator cone clutch and the impeller shell. In a stator locked mode: the body portion and the flange are non-rotatably connected; and the stator cone clutch is arranged to urge the first thrust bearing against the impeller shell in a first axial direction.

A torque converter comprising: an axis of rotation; a stator including a side plate having a first radial surface; one of an impeller shell or a turbine shell having a second tapered surface facing the stator side plate first radial surface; a hydrodynamic thrust bearing disposed between the stator side plate and the one of an impeller shell or a turbine shell, and comprising: a thrust surface facing one of the first radial surface or the second tapered surface with a fluid pathway therebetween; a supporting surface opposite the thrust surface and facing the other of the first radial surface or the second tapered surface; and an opening concentric with the axis of rotation; and, a gap between the supporting surface and the other of the first radial surface or the second tapered surface such that the bearing thrust surface is alignable to be parallel with the one of the first radial surface or the second tapered surface.

A clutch that includes a friction plate; a separator plate; a clutch hub; and a piston that presses the friction plate and the separator plate, wherein the clutch hub includes a hub on which an inner peripheral portion of the friction plate or the separator plate is fitted, a tubular shaft that movably supports the piston, and an engagement oil chamber defining wall that together with the piston defines an engagement oil chamber to which an engagement oil pressure is supplied, the hub is spline-fitted on a gear of a planetary gear so as to rotate with the gear, and the tubular shaft is rotatably supported by a central shaft and is fitted by a spigot joint in the gear.

A clutch that includes a friction plate; a separator plate; a clutch hub; and a piston that presses the friction plate and the separator plate, wherein the clutch hub includes a hub on which an inner peripheral portion of the friction plate or the separator plate is fitted, a tubular shaft that movably supports the piston, and an engagement oil chamber defining wall that together with the piston defines an engagement oil chamber to which an engagement oil pressure is supplied, the hub is spline-fitted on a gear of a planetary gear so as to rotate with the gear, and the tubular shaft is rotatably supported by a central shaft and is fitted by a spigot joint in the gear.

A powershifting multispeed reversing transmission includes a converter lockup clutch (31) arranged in a space (13) provided by arranging the forward-driving clutch (8) between the fixed gear (5) and the loose gear (7) on a forward-driving shaft, and the reverse-driving clutch (12) between the fixed gear (9) and the loose gear (11) a reverse-driving shaft.

A torque converter is provided. The torque converter includes an axially movable turbine piston and a damper assembly fixed to the turbine piston. The damper assembly includes a first cover plate, a second cover plate, a plurality of fasteners fixing the first cover plate and the second cover plate together such that the second cover plate is spaced from the first cover plate, a first drive flange axially between the first and second cover plates, a second drive flange axially between the first and second cover plates and an elastic element axially between the first and second cover plates. The first cover plate, the second cover plate, the second flange, the fasteners and the elastic element are axially movable with the piston turbine independently of the drive flange. The elastic element is configured to create a controlled rotational hysteresis between the second drive flange and the first and second cover plates during the axial movement of the first cover plate, the second cover plate, the second flange, the fasteners and the elastic element. A method of forming a torque converter is also provided.