Abstract: Methods and systems for an electric vehicle (EV). The EV system, in one example, includes a first electric drive axle and a second electric drive axle that each include a pair of electric motors and a motor coupling clutch. The EV system further includes a controller configured to selectively engage one or both of the motor coupling clutches based on vehicle load.

Abstract: Methods and systems for an electric vehicle (EV). The EV system, in one example, includes a first electric drive axle and a second electric drive axle that each include a pair of electric motors and a motor coupling clutch. The EV system further includes a controller configured to selectively engage one or both of the motor coupling clutches based on vehicle load.

Abstract: Methods and systems for an electric vehicle (EV). The EV system includes an electric drive axle that includes a first electric motor configured to transfer mechanical power to a first drive wheel, a second electric motor configured to transfer mechanical power to a second drive wheel, and a motor coupling clutch configured to selectively rotationally couple the first electric motor to the second electric motor. The EV system further includes a controller configured to selectively rotationally couple the first electric motor to the second electric motor via operation of the motor coupling clutch based on vehicle load.

Abstract: A method for operating an off-highway vehicle, comprising: receiving a torque request; rotating a first wheel at a first speed via a first side motor based on the torque request, wherein the first side motor is positioned coaxially with respect to the first wheel; and rotating a second wheel at a second speed via a second side motor based on the torque request, wherein the second side motor is positioned coaxially with respect to the second wheel.

Abstract: A method for operating an off-highway vehicle, comprising: receiving a torque request; rotating a first wheel at a first speed via a first side motor based on the torque request, wherein the first side motor is positioned coaxially with respect to the first wheel; and rotating a second wheel at a second speed via a second side motor based on the torque request, wherein the second side motor is positioned coaxially with respect to the second wheel.

Abstract: An electric driveline for an electric vehicle, comprising: a battery unit, a motor unit and a motor control unit which are fixed to a vehicle chassis. A drive axle unit supporting the vehicle chassis. The motor unit placed in a cradle member, and directly coupled to the drive axle unit by means of a coupling member. The electric driveline allowing for a transmission to be eliminated from vehicles, thereby simplifying the production process of the vehicles and reducing manufacturing costs of the vehicles.

Abstract: A high speed gear box including ribs, gears with holes, and oil channels configured to divide and distribute lubricating oil and contacting the lubricating oil with a high speed gear box housing wall. The high speed gear box housing and gear box cover have lubricating oil channel which supply lubricants to bearings. Output gears have holes which circulate oil throughout the high speed gear box. As lubricating oil is continuously circulated at locations which may create friction, the thermal energy, which is generated by high speed rotation of gears, shafts, and bearings is absorbed by cooling oil and transferred to housings, latent heat is dissipated to atmosphere through housing wall. This solves the overheating problem of electric high speed gear box.

Abstract: A method for operating an off-highway vehicle, comprising: receiving a torque request; rotating a first wheel at a first speed via a first side motor based on the torque request, wherein the first side motor is positioned coaxially with respect to the first wheel; and rotating a second wheel at a second speed via a second side motor based on the torque request, wherein the second side motor is positioned coaxially with respect to the second wheel.

Abstract: An electric driveline for an electric vehicle, comprising: a battery unit, a motor unit and a motor control unit which are fixed to a vehicle chassis. A drive axle unit supporting the vehicle chassis. The motor unit placed in a cradle member, and directly coupled to the drive axle unit by means of a coupling member. The electric driveline allowing for a transmission to be eliminated from vehicles, thereby simplifying the production process of the vehicles and reducing manufacturing costs of the vehicles.