Abstract: An apparatus includes a drive shaft, a transmission, a motor shaft, and an engine shaft. The drive shaft includes several drive gears and is used to transmit power to a wheel of a vehicle. The transmission includes a first transmission subassembly and a second transmission subassembly, each subassembly having a transmission shaft, an input gear, and several output gears. Each transmission shaft includes a shifting element to select an output gear. Each transmission subassembly transmits power to the drive shaft when the shifting element of each respective subassembly is engaged. The motor shaft is coupled to a motor and is also directly coupled to the first transmission subassembly via a first motor gear. The motor shaft is also coupled to the engine shaft via a second motor gear. The engine shaft includes several engine gears to couple the engine shaft to the first and second transmission subassemblies.

Abstract: An apparatus includes a drive shaft, a transmission, a motor shaft, and an engine shaft. The drive shaft includes a plurality of drive gears and is configured to transmit power to a wheel of a vehicle. The transmission includes a first transmission shaft including a first transmission input gear and a first plurality of output gears and a second transmission shaft including a second transmission input gear and a second plurality of output gears. The first transmission shaft includes a first shifting element configured to selectively engage an output gear from the first plurality of output gears to adjust a ratio between a shaft rotation speed of the first transmission shaft and a shaft rotation speed of the drive shaft. The second transmission shaft includes a second shifting element configured to selectively engage an output gear from the second plurality of output gears to adjust a ratio between a shaft rotation speed of the second transmission shaft and a shaft rotation speed of the drive shaft.