Abstract: Various systems and methods are provided for an electric motor of a vehicle, and particularly to an electric motor including a coolant spray ring. In one example, a spray ring for an electric motor comprises an outer circumferential surface including a plurality of axial grooves, an inner circumferential surface including a plurality of nozzle orifices in fluidic communication with the plurality of axial grooves, and a plurality of nozzle guide surfaces formed through the spray ring and extending from the plurality of axial grooves to the plurality of nozzle orifices in a direction toward a central opening of the spray ring.

Abstract: Methods and systems for an electric drive assembly are provided herein. In one example, a method for operation of an electric drive system is provided that includes coordinating operation of a first electric drive unit and a second electric drive unit based on a first power request. In the system, each of the first and second electric drive units include a planetary gear reduction that delivers power from a pair of motors to a set of axle shafts, and the planetary gear reductions have asymmetric gear ratios.

Abstract: Various methods are provided for an electric motor including a coolant jacket molded to a stator. In one embodiment, the method comprises flowing a coolant to an annular coolant passage formed between a stator and a coolant jacket molded directly to the stator, and spraying the coolant toward the stator from a nozzle formed in a spray ring molded integrally with the coolant jacket.

Abstract: Various methods and systems are provided for an electric motor including a coolant jacket molded to a stator. In one embodiment, an electric motor comprises a stator, and a coolant jacket molded as a single, unitary piece in sealing engagement against an outer perimeter of the stator, with a first end of the coolant jacket forming a first integrated spray ring.

Abstract: Methods and systems for an electric motor system are provided. In one example, a motor system is provided which comprises a first electric machine rotationally coupled to a second electric machine by a planetary gear set that has three components: a ring gear, a sun gear, and a carrier with a plurality of planet gears. In the system, the first electric machine varies in size from the second electric machine and one of the planetary assembly components is permanently grounded.

Abstract: Systems are provided for an electric motor housing. In one example, a system comprising a phase connection enclosure comprising a bus bar assembly sealed between a motor lead and a plurality of phase cable connections. The phase connection enclosure is integrally arranged within a cooling jacket of the electric motor housing.

Abstract: A method and system for shifting a transmission that includes one or more mechanical clutches without clutch plates is described. In one example, a torque output of an electric machine is adjusted in response to a request to shift a transmission so that forces that hold the mechanical clutch in an engaged position may be reduced.

Abstract: Methods and systems for an electric drive assembly are provided herein. In one example, an electric drive system is provided that includes two multi-motor drive units with associated planetary gear reductions that have asymmetric gear ratios. The planetary gear reduction in each drive unit includes a ring gear and a sun gear that are rotationally coupled to a pair of motors and a carrier rotationally coupled to an output gear that interfaces with a gear reduction of an axle assembly.

Abstract: An electric axle assembly having dual motors and dual disconnects allowing for selectably disconnecting either one of the motors so that either motor may operate as the primary drive motor. Each of the dual motors is coupled to a layshaft, and each disconnect is positioned between a gear reduction at the output of the motor and a gear reduction connected to the layshaft. The layshaft is coupled to a differential via a clutch and gear set, the gear set providing a two-speed transmission for power delivered from the layshaft to the differential.

Abstract: Methods and systems are provided for lubrication of a transmission. In one example, the transmission system may include a pair of shielded bearings attached to a first transmission shaft, each of the shielded bearings including at least one shield that forms a restriction between the shield and a race of the bearing and a cavity positioned axially between the pair of shielded bearings, wherein the restrictions tune lubricant pressurization in the cavity. The transmission system further includes a radial passage in the first transmission shaft in fluidic communication with the cavity and a lubricated transmission component.

Abstract: Methods and systems are provided for an electric axle assembly having dual motors and dual disconnects allowing for selectably disconnecting either one of the motors so that either motor may operate as the primary drive motor.

Abstract: Methods and systems are provided for lubrication of a transmission. In one example, the transmission system may include a pair of shielded bearings attached to a first transmission shaft, each of the shielded bearings including at least one shield that forms a restriction between the shield and a race of the bearing and a cavity positioned axially between the pair of shielded bearings, wherein the restrictions tune lubricant pressurization in the cavity. The transmission system further includes a radial passage in the first transmission shaft in fluidic communication with the cavity and a lubricated transmission component.

Abstract: Methods and systems for an electric drive assembly are provided herein. In one example, an electric drive system is provided that includes two multi-motor drive units with associated planetary gear reductions that have asymmetric gear ratios. The planetary gear reduction in each drive unit includes a ring gear and a sun gear that are rotationally coupled to a pair of motors and a carrier rotationally coupled to an output gear that interfaces with a gear reduction of an axle assembly.

Abstract: Methods and systems for an electric drive assembly are provided herein. In one example, a method for operation of an electric drive system is provided that includes coordinating operation of a first electric drive unit and a second electric drive unit based on a first power request. In the system, each of the first and second electric drive units include a planetary gear reduction that delivers power from a pair of motors to a set of axle shafts, and the planetary gear reductions have asymmetric gear ratios.

Abstract: Methods and systems for an electric drive assembly are provided herein. In one example, an electric drive system is provided that includes two multi-motor drive units with associated planetary gear reductions that have asymmetric gear ratios. The planetary gear reduction in each drive unit includes a ring gear and a sun gear that are rotationally coupled to a pair of motors and a carrier rotationally coupled to an output gear that interfaces with a gear reduction of an axle assembly.

Abstract: Methods and systems are provided for an electric axle assembly having dual motors and dual disconnects allowing for selectably disconnecting either one of the motors so that either motor may operate as the primary drive motor.

Abstract: Methods and systems are provided for an electric axle assembly having dual motors and dual disconnects allowing for selectably disconnecting either one of the motors so that either motor may operate as the primary drive motor.

Abstract: Methods and systems for an electric motor system are provided. In one example, a motor system is provided which comprises a first electric machine rotationally coupled to a second electric machine by a planetary gear set that has three components: a ring gear, a sun gear, and a carrier with a plurality of planet gears. In the system, the first electric machine varies in size from the second electric machine and one of the planetary assembly components is permanently grounded.

Abstract: Various systems and methods are provided for an electric motor of a vehicle, and particularly to an electric motor including a coolant spray ring. In one example, a method of manufacture comprises forming, via injection molding, a unitary motor spray ring including a plurality of axial grooves joined to a plurality of nozzle orifices.

Abstract: Various methods and systems are provided for an electric motor including a coolant jacket molded to a stator. In one embodiment, an electric motor comprises a stator, and a coolant jacket molded as a single, unitary piece in sealing engagement against an outer perimeter of the stator, with a first end of the coolant jacket forming a first integrated spray ring.