Abstract: A transmission system includes a fluid-coupling device, an electro-hydraulic control system, and a clutch. The fluid-coupling device includes an input coupled to an impeller, an output coupled to a turbine, and a stator disposed between the impeller and the turbine. The electro-hydraulic control system includes a flow valve disposed in fluid communication with the input and the output of the fluid-coupling device that is movable between at least a first position and a second position, at least one trim valve system fluidly coupled to the flow valve, and a solenoid disposed in fluid communication with the flow valve that is electrically controllable between an energized state and a de-energized state. The clutch is disposable in fluid communication with the flow valve and controllable between an applied position and an unapplied position.

Abstract: A stator for a torque converter includes a body portion with a first frusto-conical surface, a flange including a second frusto-conical surface, a stator clutch including the first and second frusto-conical surfaces, and at least one clutch plate disposed therebetween. In some example embodiments, the at least one clutch plate comprises a pair of frusto-conical surfaces. In an example embodiment, at least one of the at least one clutch plate frusto-conical surfaces includes a friction material bonded thereto. In an example embodiment, the body portion or the flange includes a first drive tab and the at least one clutch plate includes a second drive tab drivingly engaged with the first drive tab.

Abstract: A torque converter, including: a cover; a pump fixedly secured to the cover; an axially displaceable turbine hydraulically coupled to the pump; and an axially displaceable stator at least partially disposed between the pump and the turbine and including a friction clutch with a plurality of clutch plates and respective friction material disposed between the plurality of clutch plates. When the ratio of the rotational speed of the turbine with respect to the rotational speed of the pump is less than a coupling point value, the turbine or the stator is arranged to axially displace to close the friction clutch. When the ratio of the rotational speed of the turbine with respect to the rotational speed of the pump is at least equal to the coupling point value: the stator or the turbine is arranged to axially displace to open the friction clutch; or the stator is arranged to axially displace to close the friction clutch.

Abstract: A stator assembly for use in a torque converter wherein the stator assembly includes a grounded member, a reaction member and a blade assembly operatively coupled with the reaction member for rotational movement about an axis of rotation relative to the grounded member in one direction and fixed against rotational movement relative to the grounded member in the opposite direction. The reaction member is movable axially relative to the grounded member in response to fluid forces acting on the blade assembly between a first position wherein the reaction member and the blade assembly are free to rotate in one direction and a second, locked position wherein the reaction member and the blade assembly are fixed relative to the grounded member and against rotation in the opposite direction.

Abstract: A hydrodynamic unit, particularly for the transmission line of a motor vehicle, which, in addition to a main pump wheel, also has an auxiliary pump wheel which can be frictionally connected with the main pump wheel in the circumferential direction via a coupling. The coupling, which can be controlled by the admission of pressure, is constructed in the inside torus of the hydrodynamic unit and permits the energy absorption volume of the hydrodynamic unit to be varied in order to improve the starting behavior of the motor vehicle from a stopped position.

Abstract: The one-way clutch mechanism of a torque converter which has a short axial dimension, and which neither produces a shock noise (an abnormal sound) nor suffers a power loss in the idle mode thereof. An outer race (30 in FIG. 1 ) is united with a stator (18), and supports the stator (18) so as to be axially movable and rotatable with respect to a stationary shaft (16). The outer race (30) includes a first side face (32) which is formed with first teeth. An inner race (40) is united with the stationary shaft (16), and includes a second side face (42) opposite to the first side face (32). The second side face (42) is formed with second teeth which can prohibit the rotation of the outer race (30) in one direction, by meshing with the first teeth. The stator (18) and the outer race (30) receive the axial component force of a fluid stream which changes depending upon a speed ratio.

Abstract: A lockup control device for a torque converter, which is provided with a lockup clutch engageable to connect a pump at the torque converter directly with a turbine thereat and disengageable to release the direct connection of the pump and turbine, and with an actuating device comprising a car speed detector which detects car speed to output a plurality of car speed signals, a negative pressure detector which detects a suction pipe negative pressure to output a plurality of negative pressure signals, and an actuator operable in response to the car speed and negative pressure signals, so that, on a basis of the car speed and negative pressure signals output from the respective detectors, the clutch is engaged when the car speed is greater than or equal to a predetermined speed and the suction pipe negative pressure is greater than or equal to a predetermined pressure, and is disengaged when the car speed is less than the predetermined speed and the negative pressure is less than the predetermined pressure.

Abstract: The disclosure contains a hydrodynamic torque transmitting unit particularly for a hydrodynamic brake. A working chamber that is filled with working fluid contains a stator and a rotor. An inlet valve controls inlet of fluid to the working chamber. A piston connected with the inlet valve selectively closes the valve. The piston initially opens the inlet valve fully for a surge of working fluid into the working chamber. In a stage I condition, valving and pressure chambers associated with the piston returns the inlet valve to an intermediate position reducing the inflow of working fluid into the working chamber after the initial surge. In a stage II condition, the pressure chambers remain continuously pressurized for holding the inlet valve in the condition of maximum supply of working fluid to the working chamber. Various piston arrays are described in different embodiments.

Abstract: A hydrodynamic double brake includes two working chambers, each defined between a respective stator bucket wheel and a respective rotor bucket wheel. Each of the bucket wheels including buckets that extend into the respective working chambers and the bucket wheel buckets all are oriented at the same tilt angle with respect to the axis of the brake. An inlet line enters the rotor bucket wheels and then branches into the respective working chambers. Outlet ducts exit from each of the working chambers. A shell is defined around the bucket wheels and the brake and includes a valve arrangement which selectively opens the outlet ducts of one working chamber while closing the outlet ducts of the other working chamber, and vice versa.