Abstract:
A transmission includes an input member, an output member, four planetary gear sets, and a plurality of torque transmitting mechanisms that are selectively engageable to establish at least ten forward speed ratios and at least one reverse speed ratio between the input member and the output member. The transmission further includes one or more locking mechanisms that engage one or more of the plurality of torque transmitting mechanisms during a start/stop event.
Abstract:
A transmission includes an input member, an output member, four planetary gear sets, and a plurality of torque transmitting mechanisms that are selectively engageable to establish at least ten forward speed ratios and at least one reverse speed ratio between the input member and the output member. The transmission further includes one or more locking mechanisms that engage one or more of the plurality of torque transmitting mechanisms during a start/stop event.
Abstract:
A valve assembly includes a valve body having an input in selective communication with an output, a latching piston disposed within the valve body, a balance spring disposed between the latching piston and the valve body, and a valve piston disposed within the valve body. The input communicates with the output when the valve piston is in a first position and the input does not communicate with the output when the valve piston is in a second position. A diaphragm spring is disposed between the latching piston and the valve piston. A holding spring is disposed between the valve piston and the valve body.
Abstract:
An automated electric manual transmission (EMT) has an input member, an output member, and at least one shaft. The input member and the at least one shaft are rotatable about a first axis of rotation. A countershaft is substantially parallel with the at least one shaft and is rotatable about a second axis of rotation. The output member is operatively connected to rotate with the countershaft. A transmission controller controls engagement of a plurality of torque-transmitting mechanisms to selectively establish different gear ratios from the at least one shaft to the transfer shaft through pairs of intermeshing gears. An electric motor and a planetary gear set are concentric with the first axis of rotation. The electric motor can provide torque to a member of the planetary gear set.
Abstract:
A transmission is connectable to an input member and includes an output transfer gear, first and second transmission input shaft members, first, second, and third countershaft members, first and second sleeve shafts, a plurality of co-planar gear sets, and a plurality of torque transmitting devices. The torque transmitting devices include a plurality of gears, synchronizer assemblies and a dual clutch assembly. The transmission is operable to provide at least one reverse speed ratio and a plurality of forward speed ratios between the input member and the output member.
Abstract:
A permanent magnet electric machine (PM machine) includes a rotor with rotatable magnets and a stator defining an air gap with the rotor. An actuator rotates the rotatable magnets at predetermined operating points through an angular distance sufficient for changing magnetic pole orientations of the rotatable magnets, and thus modifies magnetic flux linkage with stator windings across the air gap. Fixed magnets may be arranged around a circumference of the rotor. The actuator may be actively or passively driven. Flux-shunting elements are optionally disposed in the rotor to further modify the flux linkage. A gear set connected to torque transfer elements may be driven by the actuator to rotate the rotatable magnets. A vehicle includes drive wheels, a transmission, and the PM machine. A method controls magnetic flux linkage in the PM machine noted above.
Abstract:
A permanent magnet electric machine (PM machine) for a vehicle or other system includes a rotor assembly, fixed permanent magnets, a stator, an actuator, and one or more repositionable/moveable flux-shunting elements. The flux-shunting element is repositioned to control flux at specific operating points of the PM machine. The rotor assembly has a rotor coaxially surrounding and coupled to a rotor shaft. The permanent magnets are mounted to or in the rotor, and the moveable flux-shunting element is positioned between the rotor shaft and a respective one of the permanent magnets. Inboard and outboard ends of each respective permanent magnet may be oriented toward the rotor shaft and stator, respectively. The actuator selectively positions the moveable flux-shunting element at one or more operating points of the PM machine to vary reluctance in a magnetic circuit formed by the stator and rotor assembly.
Abstract:
An electro-mechanical drive unit connectable with first and second motor/generators includes an output member, a stationary member, a gear-train, and a torque-transmitting device. The drive unit also includes a compound planetary gear arrangement having a ring gear structure, first and second sun gears, and a carrier structure. The gear arrangement includes first, second, third, and fourth junction points and has a double-pinion assembly having a first pinion gear in mesh with the first sun gear member and a second pinion gear in mesh with the first pinion gear and with the ring gear structure. The gear arrangement is operatively connected to the second motor/generator at the first junction point via the gear-train and to the first motor/generator at the fourth junction point. The output member is operatively connected to the second junction point. Furthermore, the torque-transmitting device is engageable to ground the third junction point to the stationary member.
Abstract:
A transmission for a hybrid powertrain includes a first input, a second input, a third input, and an output. A sun gear is attached to and rotatable with the first input. A carrier is attached to and rotatable with the third input. The carrier rotatably supports a plurality of pinions. Each of the pinions includes a first pinion gear and a second pinion gear. Each second pinion gear of the pinions is disposed in meshing engagement with the sun gear. A first ring gear is disposed in meshing engagement with each first pinion gear of the pinions. The first ring gear is disposed in torque communication with the second input. A second ring gear is disposed in meshing engagement with each second pinion gear of the pinions. The second ring gear is disposed in torque communication with the output.
Abstract:
The transmission includes an input shaft rotatable about a first axis of rotation, and a countershaft arranged substantially parallel with the input shaft and rotatable about a second axis of rotation. An output member is operatively connected to rotate in unison with the countershaft. Multiple pairs of intermeshing gears are included, each having a respective synchronizable gear that rotates about one of the input shaft and the countershaft, and a respective fixed gear mounted to the other one of the input shaft and the countershaft to rotate in unison therewith. An electric motor has a rotor concentric with and rotatable about the first axis of rotation. A first synchronizer is selectively engageable to synchronize rotation of the rotor with the input shaft. A second synchronizer is selectively engageable to synchronize rotation of the rotor with one of the synchronizable gears that rotates about the input shaft.