A power transmission apparatus may include a first motor-generator including a first stator fixed to a first housing, and a first rotor; a second motor-generator including a second stator fixed to a second housing and a second rotor; a first planetary gear set including first and third rotation elements connected to the first rotor and a first wheel, respectively, and a third rotation element; a second planetary gear set including fourth, fifth and sixth rotation elements connected to the second rotor, a second wheel, and the third rotation element, respectively; a first clutch selectively locking up the first planetary gear set by selectively connecting two out of the first to third rotation elements; a second clutch selectively locking up the second planetary gear set by selectively connecting two of the fourth to sixth rotation elements; and a brake selectively fixing the third and sixth rotation elements to a third housing.

An electrified drivetrain system that maximizes power density, is readily packaged, and improves drivability is described. It includes a propulsion system having an axial-flux rotating electric machine, a torque converter having a selectable one-way clutch, and an output member that is couplable to a drivetrain. The axial-flux rotating electric machine include a first rotor coaxially arranged with a first electric stator. The torque converter includes a fluidic stator, a pump, a turbine and a torque converter clutch. The axial-flux rotating electric machine is arranged coaxially with the torque converter. The first rotor of the axial-flux rotating electric machine is coupled to the pump of the torque converter, and the turbine of the torque converter is rotatably coupled to the output member.

A propulsion system for an electric vehicle includes an assembly of four electric propulsion machines each having a stator and a rotor having an output shaft that is movable in rotation about an axis. Also includes is a common gearwheel that is kinematically connected to the n output shafts and that is able to receive the torque provided by the electric machines so as to form a first speed reducer, and primary gearwheels able to be driven by the common gearwheel. An intermediate shaft is able to be driven by intermediate gearwheels, each primary gearwheel being kinematically connected to a corresponding intermediate gearwheel so as to form a pair of gears with which a second speed reducer is associated, and a secondary shaft that is able to drive the vehicle and that has a secondary gearwheel kinematically connected to the intermediate shaft so as to form a third speed reducer.

A propulsion system for an electric vehicle includes an assembly of four electric propulsion machines each having a stator and a rotor having an output shaft that is movable in rotation about an axis. Also includes is a common gearwheel that is kinematically connected to the n output shafts and that is able to receive the torque provided by the electric machines so as to form a first speed reducer, and primary gearwheels able to be driven by the common gearwheel. An intermediate shaft is able to be driven by intermediate gearwheels, each primary gearwheel being kinematically connected to a corresponding intermediate gearwheel so as to form a pair of gears with which a second speed reducer is associated, and a secondary shaft that is able to drive the vehicle and that has a secondary gearwheel kinematically connected to the intermediate shaft so as to form a third speed reducer.

Drive system for an electric vehicle including a first sub-assembly of electric machines kinematically connected to a first common gear, and a second sub-assembly of electric machines kinematically connected to a second common gear. A first set of gear trains is kinematically connecting the first sub-assembly to a secondary shaft capable of driving the driving wheels of the vehicle, wherein a first selective coupling system is arranged to select a first gear train or a second gear train from a neutral position during a gear change phase. A second sub-assembly kinematically connects the second common gear to the secondary shaft. The second sub-assembly of electric machines is controlled so as to supply additional torque making it possible to compensate for the loss of torque resulting from the uncoupling of the first sub-assembly inherent in the gear change.

Drive system for an electric vehicle including a first sub-assembly of electric machines kinematically connected to a first common gear, and a second sub-assembly of electric machines kinematically connected to a second common gear. A first set of gear trains is kinematically connecting the first sub-assembly to a secondary shaft capable of driving the driving wheels of the vehicle, wherein a first selective coupling system is arranged to select a first gear train or a second gear train from a neutral position during a gear change phase. A second sub-assembly kinematically connects the second common gear to the secondary shaft. The second sub-assembly of electric machines is controlled so as to supply additional torque making it possible to compensate for the loss of torque resulting from the uncoupling of the first sub-assembly inherent in the gear change.

Described herein relates to a system of and method for recovering energy and providing power in a multi-source transmission assembly, in which the transmission assembly includes secondary power sources in combination with a primary power source, where the secondary power sources are in reverse rotation with respect to the primary power source, such that energy is recovered during deceleration or the secondary power sources power the vehicle as needed. During the translation of a vehicle employing the transmission assembly, at least one motor may function, as needed, to propel the vehicle forward. During times in which the vehicle may not positively accelerating, at least one of the motors may switch to a generator mode to generate energy to be stored in a vehicle battery. As such, at least one of the motor power sources may recover an amount of energy expended by the vehicle during acceleration.

Described herein relates to a system of and method for recovering energy and providing power in a multi-source transmission assembly, in which the transmission assembly includes secondary power sources in combination with a primary power source, where the secondary power sources are in reverse rotation with respect to the primary power source, such that energy is recovered during deceleration or the secondary power sources power the vehicle as needed. During the translation of a vehicle employing the transmission assembly, at least one motor may function, as needed, to propel the vehicle forward. During times in which the vehicle may not positively accelerating, at least one of the motors may switch to a generator mode to generate energy to be stored in a vehicle battery. As such, at least one of the motor power sources may recover an amount of energy expended by the vehicle during acceleration.

A drive apparatus is for a vehicle that includes left and right wheels. The drive apparatus includes: (a) a left-side gear transmission mechanism disposed between a left-side drive source and the left wheel; and (b) a right-side gear transmission mechanism disposed between a right-side drive source and the right wheel. Each of the left-side and right-side gear transmission mechanisms includes a plurality of rotary shafts and a plurality of gears. The left-side and right-side gear transmission mechanisms are the same as each other in terms of a number of the rotary shafts, a number of the gears and a positional relationship between the gears. Each of the gears of the left-side gear transmission mechanism and a corresponding one of the gears of the right-side gear transmission mechanism are identical with each other and disposed in the same attitude as each other.

A drive apparatus is for a vehicle that includes left and right wheels. The drive apparatus includes: (a) a left-side gear transmission mechanism disposed between a left-side drive source and the left wheel; and (b) a right-side gear transmission mechanism disposed between a right-side drive source and the right wheel. Each of the left-side and right-side gear transmission mechanisms includes a plurality of rotary shafts and a plurality of gears. The left-side and right-side gear transmission mechanisms are the same as each other in terms of a number of the rotary shafts, a number of the gears and a positional relationship between the gears. Each of the gears of the left-side gear transmission mechanism and a corresponding one of the gears of the right-side gear transmission mechanism are identical with each other and disposed in the same attitude as each other.