A vehicle includes an engine, a drive axle, a multi-mode transmission, and a controller. 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, a first motor/generator coupled to the first gear set, a second motor/generator electrically coupled to the first motor/generator and coupled to the second gear set, a brake selectively limiting movement of a portion of the second gear set, and a clutch selectively rotationally coupling the second motor/generator to the engine. The first gear set is coupled to the engine, and the planetary gear carriers are rotatably coupled. The controller is configured to selectively configure the multi-mode transmission into an active neutral startup mode of operation by engaging the clutch and the brake such that at least one of the first motor/generator and the second motor/generator produces a voltage.

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 directly coupled to the sun gear of the first gear set, a second electrical machine directly coupled to the sun gear of the second gear set, a connecting shaft directly coupling an engine to the ring gear of 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.

Compact transmission systems and vehicles with such transmission systems are provided. An exemplary compact transmission includes a drive shaft defining a drive axis and configured to be powered by a drive unit; a planetary gearset having a ring gear member, a planet gear member, a sun gear member, and a planet carrier having a carrier shaft defining a planetary axis, wherein the planetary axis is distanced from the drive axis; an output shaft defining an output axis, wherein the output axis is distanced from the planetary axis and from the drive axis; an output gear connected to the output shaft; a drive pinion gear configured to transfer torque from the drive shaft to the planetary gearset; and an output pinion gear configured to transfer torque from the planetary gearset to the output shaft.

A driveline for an electrified vehicle includes an engine, a pump, a first electric motor, a second electric motor configured to drive a tractive assembly of the electrified vehicle, a first clutch positioned between the engine and the first electric motor, and a second clutch positioned between the first electric motor and the pump. With the first clutch engaged and the second clutch disengaged, the engine is configured to drive the first electric motor to generate electricity to charge a battery of the electrified vehicle. With the first clutch disengaged and the second clutch engaged, the first electric motor is configured to drive the pump. With the first clutch engaged and the second clutch engaged, the engine is configured to drive the pump.

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 directly coupled to the sun gear of the first gear set, a second electrical machine directly coupled to the sun gear of the second gear set, a connecting shaft directly coupling an engine to the ring gear of 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.

A vehicle includes an engine, a drive axle, a multi-mode transmission, and a controller. 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, a first motor/generator coupled to the first gear set, a second motor/generator electrically coupled to the first motor/generator and coupled to the second gear set, a brake selectively limiting movement of a portion of the second gear set, and a clutch selectively rotationally coupling the second motor/generator to the engine. The first gear set is coupled to the engine, and the planetary gear carriers are rotatably coupled. The controller is configured to selectively configure the multi-mode transmission into an active neutral startup mode of operation by engaging the clutch and the brake such that at least one of the first motor/generator and the second motor/generator produces a voltage.

An electrified vehicle includes a front axle, a rear axle, an engine, a pump, a battery, a first electric motor electrically coupled to the battery, a second electric motor electrically coupled to the battery and configured to drive at least one of the front axle or the rear axle, a first clutch positioned between the engine and the first electric motor, and a second clutch positioned between the first electric motor and the pump. With the first clutch engaged and the second clutch disengaged, the engine is configured to drive the first electric motor to generate electricity to charge the battery. With the first clutch disengaged and the second clutch engaged, the first electric motor is configured to drive the pump. With the first clutch engaged and the second clutch engaged, the engine is configured to drive the pump.

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.

A vehicle includes an engine, a drive axle, a multi-mode transmission selectively coupled to the engine and the drive axle, and a controller coupled to the multi-mode transmission and configured to selectively configure the multi-mode transmission into an active neutral startup mode of operation in response to an engine start request. 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, a first motor/generator coupled to the first gear set, and a second motor/generator electrically coupled to the first motor/generator with a bus, coupled to the second gear set, and selectively coupled to the engine. The first gear set is coupled to the engine, and the first planetary gear carrier and the second planetary gear carrier are rotatably coupled.

A device includes: a first planetary gear mechanism including a first sun gear connected to an input shaft, a first carrier connected to an output shaft, and a first ring gear; and a second planetary gear mechanism including a second sun gear connected to the input shaft, a second carrier connected to a first fixed element via a first engagement element, and a second ring gear connected to a second fixed element via a second engagement element, the first planetary gear mechanism and the second planetary gear mechanism are connected by the first ring gear and the second carrier, and the first sun gear and the first ring gear are connected by a third engagement element.