Abstract: Systems and methods for an electric drive. The electric drive system includes, in one example, a first electric machine rotationally coupled to a first sun gear in a first planetary gear set and a second electric machine rotationally coupled to a second sun gear in a second planetary gear set. The electric drive system further includes a first clutch configured to selectively rotationally couple the second sun gear to a first ring gear in the first planetary gear set, a second clutch configured to ground a second ring gear in the second planetary gear set, and a power take-off (PTO) clutch configured to selectively rotationally couple the first electric machine or the first planetary gear set to a PTO device.

Abstract: A configuration of an electric axle comprising: a first clutch configured to ground a ring gear in a first planetary gearset; a second clutch configured to: ground a carrier in a second planetary gearset; and drivingly couple an input of the first planetary gearset to an output of the second planetary gearset to bypass the first planetary gearset; one or more park brakes configured to ground one or more shafts to an axle housing of the electric axle; and a controller configured to: in a hill hold mode, engage the first clutch, the second clutch, and the one or more park brakes; and in disconnect mode, disengage the first clutch, the second clutch, and the one or more park brakes, where the disconnect mode is a towing state allowing for towing.

Abstract: Methods and systems for controlling a maximum power output of an electric propulsion system are described. In one example, a state machine generated from executable instructions controls a maximum power output of an electric propulsion systems. The state machine permits additions states and changes to conditions that facilitate transitioning between the various states without having to completely reconstruct the maximum power output method.

Abstract: Methods and systems for controlling a power take-off and engagement of an electric machine of an electric vehicle are described. In one example, a power take-off and engagement of a disconnect clutch are controlled in response to vehicle speed and tractive effort. A first electric machine is fixable coupled to a gear set of a transmission and the driveline disconnect clutch may selectively couple a second electric machine to the gear set.

Abstract: Methods and systems are provided for a transmission. In one example, the transmission includes electric motor arranged on both sides thereof. In at least one example, electric motors on opposite sides of the transmission are coupled to a single input shaft.

Abstract: Methods and systems are provided for a vehicle hill control. An example of a method may include during a vehicle stopped condition, operating with a clutch of a transmission engaged to mechanically lock the transmission, the transmission having a plurality of power inputs including receiving input from an electric machine and a prime mover; releasing at least one of the clutch or a service brake, and while releasing, concurrently adjusting an output magnitude of the electric machine responsive to speed control to control to a zero vehicle speed. In some examples, the method may further include learning a torque output of the electric machine required to maintain the zero vehicle speed upon fully releasing the clutch or service brake. In an example, the method may include estimating a road grade based on the learned torque output.

Abstract: Systems and methods for an electric drive. The electric drive system includes, in one example, a first electric machine rotationally coupled to a first sun gear in a first planetary gear set and a second electric machine rotationally coupled to a second sun gear in a second planetary gear set. The electric drive system further includes a first clutch configured to selectively rotationally couple the second sun gear to a first ring gear in the first planetary gear set, a second clutch configured to ground a second ring gear in the second planetary gear set, and a power take-off (PTO) clutch configured to selectively rotationally couple the first electric machine or the first planetary gear set to a PTO device.

Abstract: A method and system for operating a multi-mode electro-mechanical infinitely variable transmission (EMIVT) that is coupled to an engine and includes two electric machines is described. In one example, operating modes of the two electric machines are controlled without regard to vehicle speed and system conditions that are external to the two electric machines.

Abstract: Methods and systems for controlling a power take-off and engagement of an electric machine of an electric vehicle are described. In one example, a power take-off and engagement of a disconnect clutch are controlled in response to vehicle speed and tractive effort. A first electric machine is fixable coupled to a gear set of a transmission and the driveline disconnect clutch may selectively couple a second electric machine to the gear set.

Abstract: Methods and systems for providing power to a mechanical system of an electric vehicle are described. The methods and systems may be applied to vehicles that include hydraulically operated systems and that are propelled via an electric machine. The methods and systems may allow a single electric machine to propel a vehicle and drive an external load when the vehicle is not being propelled.

Abstract: Systems and methods for an electric drive unit are provided. In one example, an electric drive unit comprises a transmission system comprising a plurality of motor-transmission subassemblies each comprising an electric motor coupled to an input shaft comprising a first and second gear, and a intermediate shaft comprising a dog clutch selector, a first and second clutch gear, wherein the first clutch gear meshes with the first gear of the input shaft and the second clutch gear meshes with the second gear of the input shaft and wherein the dog clutch selector is configured to selectively couple the first or second clutch gear to the intermediate shaft; and an output shaft rotationally coupled to the plurality of motor-transmission subassemblies; and a controller configured to, in response to a powershift request, increase torque of at least one electric motor while at least one other motor-transmission subassembly is shifting.

Abstract: Methods and systems for providing power to a mechanical system of an electric vehicle are described. The methods and systems may be applied to vehicles that include hydraulically operated systems and that are propelled via an electric machine. The methods and systems may allow a single electric machine to propel a vehicle and drive an external load when the vehicle is not being propelled.

Abstract: Methods and systems for controlling a maximum power output of an electric propulsion system are described. In one example, a state machine generated from executable instructions controls a maximum power output of an electric propulsion systems. The state machine permits additions states and changes to conditions that facilitate transitioning between the various states without having to completely reconstruct the maximum power output method.

Abstract: Systems and methods for an electric powertrain. The method, in one example, includes responsive to receiving a shift command, engaging a second friction clutch while disengaging a first friction clutch to transition from a first operating gear ratio to a second operating gear ratio. The method, further includes during the gear ratio transition, operating a traction motor under a peak condition, the peak condition denotes a condition where the motor speed is greater than a maximum continuous torque curve of the motor.

Abstract: A dual-motor transmission therefor, comprising a first and a second electric traction motor, a first gear arrangement, a second gear arrangement, and a summation box. The first gear arrangement includes a shaft and at least a first gear and a second gear, wherein each of the first and the second gears can be selectively engaged and disengaged with the shaft via a clutch, and the first gear arrangement supplies a first torque from the first motor to the summation box. The second gear arrangement includes a shaft and at least a first gear, wherein the first gear can be engaged and disengaged with the shaft via a clutch, and the second gear arrangement supplies a second torque from the second motor to the summation box, and the summation box is configured to combine the first and second torques and to output a combined output torque.

Abstract: A transmission system is provided. The transmission system includes an electric motor rotationally coupled to a first pump, a second pump, and a third pump via a drive shaft, where an output of the first pump is in fluidic communication with a lubrication circuit and where an output of the third pump is in fluidic communication with an actuation circuit. The transmission system further includes a valve fluidly coupled to the output of the first pump and an output of the second pump and a controller including instructions stored in non-transitory memory that when executed during a first operating condition, cause the controller to selectively operate the valve based on a change in one or more operating conditions in the transmission system.

Abstract: The present disclosure relates to a transmission for a vehicle having a power source, the transmission comprising: an input member for receiving power from the power source; an output member for outputting power to at least one component of the vehicle; at least one power split gear set having a plurality of members and operatively connected between said input member and said output member; an electromagnetic variator having a stator, an outer rotor and an inner rotor; wherein the inner rotor is at least partially received in the outer rotor and the electromagnetic variator is configured to provide variable torque transmission ratios between the outer rotor and inner rotor; and wherein said first and second rotors are each operatively connectable to different ones of said members of said power split gear set and are each operatively connectable to the input member to be driven thereby.

Abstract: An electric driveline system is provided. The electric driveline system includes a first electric machine and a second electric machine mechanically coupled to a transmission and a power take-off (PTO) assembly coupled to the first electric machine. The PTO assembly includes a first clutch coupled to a PTO gearset and designed to selectively disconnect a PTO from the first electric machine and the PTO gearset is mechanically coupled to the first electric machine.

Abstract: Methods and systems for a vehicle transmission are provided. An electromechanical transmission system includes, in one example, a power take-off (PTO) clutch configured to, in a first position, permit a motive power source shaft to solely drive a PTO. The PTO clutch is further configured to, in a second position, permit a first electric machine and a second electric machine to continuously vary a torque that is supplied to the PTO by the motive power source shaft.

Abstract: Systems and methods for an electric powertrain. The method, in one example, includes responsive to receiving a shift command, engaging a second friction clutch while disengaging a first friction clutch to transition from a first operating gear ratio to a second operating gear ratio. The method, further includes during the gear ratio transition, operating a traction motor under a peak condition, the peak condition denotes a condition where the motor speed is greater than a maximum continuous torque curve of the motor.