Abstract: A device includes a first rotor segment and a second rotor segment, wherein the first rotor segment and the second rotor segment are configured to be directly coupled together about a shaft to form at least a portion of a unitary rotor. The device also includes a first stator segment and a second stator segment, wherein the first stator segment and the second stator segment are configured to be directly coupled together to form at least a portion of a unitary stator.

Abstract: A disconnect clutch comprises a passive centrifugal valve that is utilized to disconnect parasitic loads from an engine during the initial start-up and to automatically connect the parasitic loads once the engine speed is sufficient. The passive centrifugal valve operates dependent on a rotational speed of a flywheel assembly of the clutch and is configured to switch at a threshold rotational speed of the flywheel assembly.

Abstract: A piston subassembly for operating a clutch of a transmission including a piston, a compensation dam, wherein the piston is axially moveable with respect to the compensation dam, and a clip operatively affixed to the piston, the clip operatively arranged between the piston and the compensation dam, the clip including at least one spring element for exerting a force between the dam and the piston to pull the piston axially away from the compensation dam, wherein the compensation dam is included on a transmission shaft, the compensation dam including a radially inner flange having a slot, wherein the slot is operatively arranged to engage with a radial protrusion on the transmission shaft for forming a twist-lock between the compensation dam and the shaft.

Abstract: Electromechanical apparatus for use with a coupling assembly and controllable coupling assembly including such apparatus are provided. The apparatus includes a housing part including an end wall having an outer coupling face with a single pocket defining a load-bearing shoulder in communication with an inner face of the end wall. An electromagnetic source includes at least one excitation coil which is at least partially surrounded by the housing part. An element is received within the pocket in an uncoupling position and is movable outwardly from the pocket to a coupling position characterized by abutting engagement of the element with the load-bearing shoulder. A reciprocating armature is arranged concentrically relative to the at least one excitation coil and is axially movable when the at least one excitation coil is supplied with current. The armature is connected to the element to move the element between the coupling and uncoupling positions.

Abstract: An electromechanically actuated coupling and control assembly is provided. In one embodiment, an overrunning clutch and control assembly having first and second operating modes is provided. The clutch and control assembly includes first and second clutch members supported for rotation relative to one another about a common rotational axis. The first and second clutch members have respective coupling faces that oppose each other. The coupling face of one of the clutch members has a pocket. The coupling face of the other clutch member has a locking formation. The assembly further includes a strut received within the pocket in the coupling face of the one clutch member and has an end that is pivotally movable outwardly of the pocket. The assembly still further includes a biasing spring. The assembly further includes an electromechanical apparatus including an actuator mounted for controlled linear reciprocating motion and in communication with the pocket.

Abstract: A torque transfer coupling includes first and second rotary members. A transfer clutch operatively connects the first and second rotary members. A piston, disposed in a piston chamber, is actuable to engage the transfer clutch. A hydraulic pump in fluid communication with a sump containing hydraulic fluid has a first pump member fixed for rotation with the first rotary member and a second pump member fixed for rotation with the second rotary member such that relative rotation between the first and the second pump members generates a fluid pumping action. A first flow path supplies hydraulic fluid from the hydraulic pump to the piston chamber. A second flow path supplies hydraulic fluid from the piston chamber to a control valve for regulating the pressure of the hydraulic fluid supplied to the piston chamber. The second flow path includes an aperture extending through the second pump member.

Abstract: A hydraulic assembly for actuating a setting unit in a motor vehicle may include at least one hydraulic actuating unit which acts on the setting unit, as well as at least one piston pump with a piston which is displaceably positioned in a housing, wherein, when the piston moves, there is built up a hydraulic pressure for loading the actuating unit. There is provided a driveshaft with an axis of rotation and an eccentric, wherein the eccentric acts on the piston of the at least one piston pump and, when the driveshaft rotates, builds up a hydraulic pressure. Furthermore, the hydraulic assembly may be integrated within a coupling assembly.

Abstract: A pneumatic constricting drum brake with rotary seals attached to opposite axial sides of the hub central region for sealing the hub and brake drum. Both rotary seals are accessible for replacement in service by removal of the housing side plate and brake drum without removal of the hub.

Abstract: A clutch arrangement having an input element and an output element that are rotatable relevant to one another, a friction clutch and a pump. The friction clutch couples the input element with the output element in dependence on a hydraulic pressure in a pressure space of the clutch arrangement. The pump has a first pump part that is rotationally fixedly connected to the input element and a second pump part that is rotationally fixedly connected to the output element. The pump may be driven by a rotary movement of the input element and the output element relative to one another, with a pressure side of the pump being connected to the pressure space. An orifice having a substantially temperature independent leakage characteristic is arranged in a leakage line that leads from the pressure space to a low pressure space and which extends parallel to the pump.

Abstract: A hydraulic coupling for use in a vehicle drivetrain to couple a pair of rotary members and includes a coupling mechanism supported in a casing and that is operable to couple the pair of rotary members together. A piston is responsive to pressurized fluid generated by a pump to move between first and second positions, thereby engaging the coupling mechanism. The pump has an outlet located in a direction away from the piston. An internal passage provides fluid communication between the outlet of the pump and an expandable chamber formed adjacent the piston. A control valve controls the flow of pressurized fluid from the pump between the sump and the expandable chamber.

Abstract: The present invention provides a servo actuated operating mechanism for a coacting lobed rotor positive displacement supercharger combining a low cost and capacity electromagnetic clutch with a small oil pump internal to the supercharger unit. The oil pump supplies on demand oil pressure from oil in a hydraulic clutch housing or the supercharger timing gear case and acts as a servomechanism to actuate an internal hydraulic clutch. The hydraulic clutch can be engaged over a much wider range of speeds and loads than is possible with an electromagnetic clutch alone. The electro-hydraulic servomechanism provides improved highway fuel economy relative to an electromagnetic clutch as the engagement speed could be moved to a higher rotational speed (rpm). The internal hydraulic system makes higher supercharger engagement speeds possible with a hydraulic system, but without the assembly and leak issues associated with externally plumbed engine oil system actuated clutches.

Abstract: A power transfer assembly for use in a motor vehicle and having a hydraulic coupling operable to transfer drive torque to a driveline in response to slip. The hydraulic coupling includes a transfer clutch, a clutch operator for engaging the transfer clutch, a fluid actuation system including a fluid pump for controlling movement of the clutch operator, and a magnetorheological pump clutch capable of selectively shifting the fluid pump between operative and inoperative states.