A shifting device for a motor vehicle transmission has a first coupling component, a second coupling component rotatable about a transmission axis (A), an inner friction ring which has a conical surface on a radially outer face, an outer friction ring which has a conical surface on a radially inner face, and an intermediate friction ring having a C-shaped ring cross section, including a friction cone connected to the second coupling component for joint rotation with and for axial displacement with respect to the second coupling component, while the inner friction ring and the outer friction ring are connected to the first coupling component for joint rotation with and for axial displacement with respect to the first coupling component. The friction cone extends between the conical surfaces of the inner friction ring and outer friction ring.

A clutch that has a synchronizer for matching a rotational velocity of a drive input with a rotational velocity of a driven output prior to engagement of a locking mechanism.

A power transmitting system including: a first piston disposed within a center bore formed through the rotary shaft such that the first piston is axially reciprocable; a sleeve connected to the first piston and having internal teeth meshing with the external teeth of the rotary shaft so that the sleeve is rotated with the rotary shaft, and such that the sleeve is axially reciprocable together with the first piston according to axial movements of the first piston; a synchronizer ring supported in sliding contact with an outer circumferential tapered surface of the clutch gear such that the synchronizer ring is rotatable relative to the clutch gear; and an actuator including a second piston to axially advance the first piston for thereby bringing the sleeve's internal teeth into meshing engagement with the clutch gear through the synchronizer ring. The first piston and second piston are disposed coaxially with the rotary shaft.

A shifting device for a motor vehicle transmission includes several transmission shafts which each are rotatable about a transmission axis, a synchronizer ring which is firmly connected with a transmission shaft, a first disk carrier, a plurality of first disks which are non-rotatably and axially shiftably connected with the first disk carrier, a second disk carrier which is axially shiftable relative to the first disk carrier and in circumferential direction can be coupled with the synchronizer ring both frictionally and positively, a plurality of second disks which are non-rotatably and axially shiftably connected with the second disk carrier and form a multidisk clutch with the first disks, and an actuating body for axially pressurizing the second disk carrier, wherein the actuating body and the second disk carrier are rotatable relative to each other in circumferential direction and substantially are firmly connected with each other in axial direction.

A dual actuation synchronizing clutch assembly including an improved synchronization arrangement is provided. The dual actuation synchronizing clutch assembly has a plurality of operational phases, including initial, synchronization, positioning, engagement, and running phases that vary the torque flow path between the input shaft and output shaft. A synchronizing assembly is provided that includes a synchronizer ring having a first friction surface and synchronizer teeth. A connecting gear includes a lock-up assembly with retractable elements and connecting gear teeth. An output gear includes a second friction surface configured to frictionally engage the first friction surface of the synchronizer ring, and a contoured receiving path with positioning points configured to receive the retractable elements of the lock-up assembly.

A piston system comprises a housing (3) comprising a first recess (6) and a second recess (7). A first piston (1) comprises a first portion embedded in the first recess (6). A second piston (2) comprises a second portion embedded in the second recess (7). An actuator (10) has a first side (20) and a second side (21). The first piston (1) selectively presses against the first side (20) of the actuator, and the second piston (2) selectively presses against the second side (21) of the actuator. The actuator may be a synchronizer of a clutch assembly.

A transmission system (8) comprising at least one floating gear (14a, 16a, 18a) rotationally mounted upon a first shaft the system comprising a floating gear activation system for controlling torque transfer between the at least one floating gear (14a, 16a, 18a) and the first shaft (10), the gear activation system comprising a first device (28, 30) having a friction interface (28) for frictional engagement with a friction interface (30) disposed on a first side of the at least one floating gear (18a), and a second device (25, 26) having a locking interface (25) for an interpositional engagement with a locking interface (26) disposed on a second side, opposing the first side, of the at least one floating gear (18a), whereby the floating gear (18a) is rotationally coupleable to the first shaft (10) by the friction interface (28/30) and/or the locking interface (25/26).

A dual actuation synchronizing clutch assembly including an improved synchronization arrangement is provided. The dual actuation synchronizing clutch assembly has a plurality of operational phases, including initial, synchronization, positioning, engagement, and running phases that vary the torque flow path between the input shaft and output shaft. A synchronizing assembly is provided that includes a synchronizer ring having a first friction surface and synchronizer teeth. A connecting gear includes a lock-up assembly with retractable elements and connecting gear teeth. An output gear includes a second friction surface configured to frictionally engage the first friction surface of the synchronizer ring, and a contoured receiving path with positioning points configured to receive the retractable elements of the lock-up assembly.

This invention relates to a shifting device for a motor vehicle transmission, in particular a fully automatic stepped transmission, comprising several transmission shafts which each are rotatable about a transmission axis, a synchronizer ring which is firmly connected with a transmission shaft, a first disk carrier, a plurality of first disks which are non-rotatably and axially shiftably connected with the first disk carrier, a second disk carrier which is axially shiftable relative to the first disk carrier and in circumferential direction can be coupled with the synchronizer ring both frictionally and positively, a plurality of second disks which are non-rotatably and axially shiftably connected with the second disk carrier and form a multidisk clutch with the first disks, and an actuating body for axially pressurizing the second disk carrier, wherein the actuating body and the second disk carrier are rotatable relative to each other in circumferential direction and substantially are firmly connected with each other in axial direction.

Systems and methods are provided for a friction assisted dog clutch assembly, comprising: a piston; one or more pins, wherein the pins are adapted to be moved by the piston; one or more friction discs, wherein the friction discs have a number of slots and the plurality of pins pass through the slots; and an endplate, wherein the endplate has a number of recesses adapted to receive the pins.