Abstract: A pump system that pressurizes a fluid includes a shaft, a first rotor and a second rotor that is selectively driven by the shaft. Relative rotation between the first rotor and the second rotor generates variable sized pockets therebetween to pressurize the fluid. A clutch regulates a degree of coupling of the rotor to the shaft between a decoupled state and a coupled state to regulate the relative rotation between the first and second rotors.

Abstract: An automated dual-clutch multi-speed transmission is adapted to transfer power from an engine to the driveline of a motor vehicle. The transmission includes an output shaft adapted for connection to the driveline, an input shaft continuously driven by the engine and offset from a position substantially parallel to the output shaft. A countershaft is in constant driving engagement with the output shaft and is offset from and positioned substantially parallel to the input and output shafts. A first clutch is operable for establishing a releasable drive connection between the input shaft and a first driven shaft. A second clutch is operable for establishing a releasable drive connection between the input shaft and a second driven shaft. First and second gearset clutches are operable to releasably drivingly couple first and second gearsets to the countershaft.

Abstract: The invention relates to a component (10) with a retaining function, comprising at least one first element (16) and at least one second element (26) which are arranged movably with respect to each other, at least one magnetizable component (18) with residual properties, a magneto-rheological fluid (38) or magnetic powder which is located in the magnetic field of the at least one magnetizable component, when the latter is magnetized, and via which the two elements can be brought into operative connection, and a coil (20) which is arranged in such a manner that, when energized, it can generate a magnetic field sufficient to magnetize the at least one magnetizable component, wherein the coil and the at least one magnetizable component are arranged in such a manner that a first currentless or energized state can be generated, sufficient so as to maintain the operative connection, and a second currentless state can be generated, as a result of which the operative connection can be undone.

Abstract: A transfer case includes a two-speed range unit, a friction clutch, an actuation mechanism and a control system. The actuation mechanism includes an electric motor, a geartrain driven by the motor, a range actuator assembly and a mode actuator assembly. The range actuator assembly includes a driveshaft driven by the geartrain, a cam driven by the driveshaft and a shift fork having a follower retained in a groove formed in the cam and a fork engaging a shift collar associated with the range unit. The mode actuator assembly has a face cam with spiral cam surfaces and a control gear with radially-moveable rollers engaging the cam surfaces. The control gear is rotatively driven by the geartrain. The face cam is axially moveable for controlling engagement of the friction clutch. An anti-rotation mechanism limits rotation of the face cam in response to continued rotation of the control gear.

Abstract: The invention relates to a power divider for motor vehicles, comprising a housing (1), a primary shaft (2) having a drive connection to a first driven axis, a controlled friction coupling (4) and a displacement drive (6, 7, 8) for the drive of a second driven axis. The friction coupling (4) can be actuated by means of two ramp rings (1, 16) which can rotate counter to each other and which comprise articulated jacks (19, 20). In order to use the toothed wheels as a displacement drive and to provide a compact and economical actuator, the control curves are embodied on a control cam (25) which comprises two control sliding tracks (35, 36) which are offset in relation to each other and can be rotated about a parallel axis in relation to the axis of primary shaft (2). The control cam (25) is rotationally mounted on the second toothed wheel (7) or the shaft thereof (9).

Abstract: The present invention relates to a method for the calibration of a position determination system of a rear axle steering actuator for a motor vehicle. The rear axle steering actuator has an actuator element which can be driven by a rotary movement of a rotor to a translation movement and whose geometrical center position is determined by means of a reference measurement. The position determination system includes a linear sensor and a rotary sensor. During the calibration of the position determination system, a piece of calibration information is generated which includes a piece of zero point information of the linear sensor and a piece of sector information. The measurement range of the rotary sensor is divided into at least two sectors. The sector information identifies that angle at which the angular position of the rotor defined by the rotary sensor lies when the actuator element is arranged in its geometrical center position. The calibration information is stored in the linear sensor.

Abstract: A mass balance unit having an integrated secondary unit for an internal combustion engine of a motor vehicle has a mass balance housing in which at least one mass balance shaft is rotatably journaled and has a unit housing in which at least one drive shaft of the secondary unit is rotatably journaled. The mass balance housing is made in one piece such that the mass balance housing has at least one bearing section which surrounds a bearing opening peripherally in one piece in which the mass balance shaft is rotatably journaled. The unit housing is also made in one piece with at least one base section, with a wall section and with a bearing section such that the bearing section of the unit housing surrounds a bearing opening peripherally in one piece in which the drive shaft is rotatably journaled. The drive shaft is operably connected to the balance shaft drivewise. The base section of the unit housing is releasably fastened to a lower side of the mass balance housing.

Abstract: A power transfer unit is provided with a torque limiting assembly that limits the torque transferred to driveline components when torque peaks occur. The power transfer unit can include, a first shaft, a second output shaft receiving drive torque, a second output shaft, and a torque transfer mechanism. The torque transfer mechanism includes a coupling member and a biasing member. The coupling member is located between a driving member and a driven member and provides selective engagement therebetween when in an engaged position. The driving member and/or the driven member includes a recess therein receiving a portion of the coupling member when in the engaged position. The biasing member urges the coupling member and the driving member and/or driven member into the engaged position.

Abstract: A torque coupling having an actuation system operable to control actuation of a transfer clutch in coordination with actuation of a pump clutch. The transfer clutch is disposed between a pair of rotary members to transfer drive torque therebetween. The pump clutch is operable for selectively coupling a fluid pump to the first rotary member when lubricant is required to cool the transfer clutch.

Abstract: A hybrid drive system for a four-wheel drive system arranged to supply motive power to a first output shaft of a transfer case from an internal combustion engine and to a second output shaft from an electric motor/generator. The transfer case includes a reduction gearset driven by the electric motor/generator, a power take-off unit driven by the reduction gearset, and a disconnect clutch operable for selectively coupling the reduction gearset to the second output shaft. This hybrid drive arrangement permits installation of a modified transfer case in place of a conventional transfer case for use in a traditional four-wheel drive driveline arrangement.

Abstract: A pump system that pressurizes a fluid includes a shaft, a first rotor and a second rotor that is selectively driven by the shaft. Relative rotation between the first rotor and the second rotor generates variable sized pockets therebetween to pressurize the fluid. A clutch regulates a degree of coupling of the rotor to the shaft between a decoupled state and a coupled state to regulate the relative rotation between the first and second rotors.

Abstract: A novel variable displacement vane pump is provided wherein pressurized working fluid is provided to a portion of the pump chamber to act on the outside of the capacity varying ring to substantially balance the force created by the high pressure working fluid inside the ring. As the resultant high pressure force acting on the pivoting pin is reduced, the movement of the displacement control ring is smoother, reducing undesirable hysteresis, the wear on the pin is reduced and the additional force required to move the ring to vary the volumetric displacement of the pump is less than would otherwise be needed, allowing the related control mechanisms to be smaller.

Abstract: The invention relates to a method for the installation of an assembly, in particular of a balance shaft unit for the compensation of mass or torque for internal combustion engines in motor vehicles. The assembly includes a housing part having at least one bearing section, at least one rotating component and at least one rolling element bearing for the axially fixed journaling of the rotating component in the bearing section of the housing part. The bearing section is closed in the peripheral direction and is made in one piece. The rolling element bearing has a first ring section and a second ring section, with the first ring section being associated with the rotating component and the second ring section being associated with the bearing section of the housing part. The rolling element bearing is axially fixedly installed at the rotating component or in the bearing section of the housing part in a first installation step.

Abstract: A torque transfer mechanism includes a multi-plate clutch assembly that is operably disposed between a first rotary and a second rotary member. A control system determines a desired quantity of torque to deliver to the second rotary member and controls the clutch to produce the desired torque.

Abstract: A dual-clutch transmission for use in a motor vehicle having an engine and a driveline includes an output shaft adapted for connection to the driveline and a planetary gearset in constant driving engagement with the output shaft. An input shaft is driven by the engine. A first constant mesh gearset is in selective driving communication with a first member of the planetary gearset. A second constant mesh gearset is in selective driving communication with a second member of the planetary gearset. A first clutch is operable for establishing a releasable drive connection between the input shaft and the first constant mesh gearset. A second clutch is operable for establishing a releasable drive connection between the input shaft and the second constant mesh gearset. A motor is selectively drivingly coupled to a third member of the planetary gearset.

Abstract: A power transfer unit is provided with a torque limiting assembly that limits the torque transferred to driveline components when torque peaks occur. The power transfer unit can include, a first shaft, a second output shaft receiving drive torque, a second output shaft, and a torque transfer mechanism. The torque transfer mechanism includes a coupling member and a biasing member. The coupling member is located between a driving member and a driven member and provides selective engagement therebetween when in an engaged position. The driving member and/or the driven member includes a recess therein receiving a portion of the coupling member when in the engaged position. The biasing member urges the coupling member and the driving member and/or driven member into the engaged position.

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.

Abstract: A drive axle assembly includes first and second axleshafts connected to a pair of wheels and a drive mechanism operable to selectively couple a driven input shaft to one or both of the axleshafts. The drive mechanism includes a differential, a speed changing unit operably disposed between the differential assembly and the first and second axleshafts, first and second mode clutches and a brake unit. The first mode clutch is operable to increase the rotary speed of the first axleshaft which, in turn, causes a corresponding decrease in the rotary speed of the second axleshaft. The second mode clutch is operable to increase the rotary speed of the second axleshaft so as to cause a decrease in the rotary speed of the first axleshaft. The brake unit is operable to engage the speed changing unit. A control system controls actuation of both mode clutches.

Abstract: The invention relates to a transfer case arrangement comprising a first output shaft, a second output shaft, a clutch for the distribution of a torque between the output shafts, a shutdown device for the shutting down of the second output shaft when the clutch is disengaged and a lubrication device for the lubrication of the clutch and/or of another component of the transfer case arrangement.

Abstract: A transfer case is provided with a range unit, an interaxle differential, a clutch assembly and a power-operated actuation mechanism. The range unit includes a planetary gearset driven by an input shaft, and a synchronized dog clutch assembly for releasably coupling one of the input shaft or an output component of the planetary gearset to an input member of the interaxle differential. The interaxle differential further includes a first output member driving a first output shaft, a second output member operably driving a second output shaft. The clutch assembly is a multi-plate friction clutch operably disposed between the first and second output shafts. The power-operated actuation mechanism includes a range actuator assembly, a clutch actuator assembly and a motor assembly operable to control coordinated actuation of the range actuator assembly and the clutch actuator assembly.