Abstract: An isolation assembly (26) for transferring torque between an engine (20) and a planetary transmission (30) includes both a radial spring assembly (56) and a viscous fluid damper (58). A damper plate (76) is rotationally coupled to the engine (20) and to the radial spring assembly (56). The damper plate (76) is also coupled to the viscous fluid damper (58). The torque output from the damper (58) and radial spring assembly (56) is then coupled to the input to the transmission (30).

Abstract: A differential assembly is disclosed having a pair of hydraulic couplings installed in a differential casing and operably arranged to rotatively couple first and second rotary members to the differential casing. Each hydraulic coupling includes a clutch pack operatively connected between one of the rotary members and the casing, a hydraulic pump, and a fluid distribution system for delivering pumped fluid to a pressure chamber to actuate a piston for engaging the clutch pack and to a clutch chamber to cool the clutch pack.

Abstract: A servo-drive device is provided for an actuating of, for example, ventilation dampers in motor-vehicle air-conditioning installations element which can be stably positioned in a plurality of positions, d.c. motors with a gear mechanism are used for servo-drive devices of this type. A mechanical system which is moved at the same time and has potential energy varying along its path of movement is coupled to the servo drive such that it influences the current of the servo motor to permit the respective position of the actuating element to be identified by a control device on the basis of the evaluation of the motor current characteristically which depends on the force exerted by the mechanical system on the actuating element.

Abstract: A stepless transmission system with a powering input shaft drivingly connected to a first sun gear, the first sun gear surrounded by a first planet gear carrier containing a number of planet gears disposed in a peripheral segment thereof so as to drivingly engage the first sun gear, and a first ring gear disposed about the first planet gear carrier so as to engage the first set of planet gears along an interior drive surface of the first ring gear such that regulated movement of the first ring gear controls movement of the first planet gear carrier that results from rotation of the input shaft and accordingly first sun gear. Additionally, the system includes a second sun gear surrounded by a second planet gear carrier, with a second set of planet gears rotatably disposed therein, the second set of planet gears being surrounded by a second ring gear that is actually connected with the first planet gear carrier such that rotation of the first planet gear carrier correspond rotation of the second ring gear.