Abstract: A vehicle includes an engine, a drive axle, a multi-mode transmission, and a controller coupled to the multi-mode transmission. The multi-mode transmission includes a first gear set having a first planetary gear carrier and a second gear set having a second planetary gear carrier, the first planetary gear carrier and the second planetary gear carrier being rotatably coupled, a first motor/generator coupled to the first gear set, a second motor/generator coupled to the second gear set and selectively coupled to the engine, a brake positioned to selectively limit a rotational movement of a ring gear of the second gear set when engaged, a first clutch, and a second clutch. The controller is configured to selectively transition the multi-mode transmission between a mid range mode of operation and a high range mode of operation via an intermediate shift mode of operation.

Abstract: A drive system includes a first gear set and a second gear set, each including a sun gear, a ring gear, a plurality of planetary gears coupling the sun gear to the ring gear, and a carrier rotationally supporting the plurality of planetary gears, a first electrical machine coupled to the first gear set, a second electrical machine coupled to the second gear set, a connecting shaft coupling an engine to the first gear set, a driveshaft configured to transport power from the first electrical machine, the second electrical machine, and the engine to a tractive element of the vehicle, and a clutch selectively rotationally coupling the first carrier and the second carrier to the driveshaft when engaged.