A drive unit for a hybrid vehicle an axial length thereof is shortened is provided. A power distribution device is disposed in an inner circumferential side of a cylindrical output gear, and at least a portion of a second clutch is also disposed in the inner circumferential side of the output gear while being adjacent to the power distribution device in an axial direction.

A drive system for a hybrid vehicle, the drive system includes an engine (1), a rotary machine (MG1), a differential unit (20), and a transmission unit (10). The rotary machine (MG1) is arranged coaxially with the engine (1). The differential unit (20) connects the engine (1) and the rotary machine (MG1) to a drive wheel side. The differential unit (20) is arranged coaxially with the engine (1) and the rotary machine (MG1). The differential unit (20) is arranged between the engine (1) and the rotary machine (MG2). The transmission unit (10) changes rotation of the engine in speed and transmits the rotation to the differential unit (20). The transmission unit (10) is arranged coaxially with the engine (1), the rotary machine (MG1) and the differential unit (20). The rotary machine (MG1) and the differential unit (20) are arranged between the transmission unit (10) and the engine (1).

A four wheel drive power transmission system may include: a front wheel drive unit configured to selectively transmit power of an engine and power of a first motor/generator to a front wheel differential apparatus; and a rear wheel drive unit configured to transmit power of a second motor/generator to a rear wheel reduction gear unit.

A transmission includes a single planetary gearset, a first torque machine, an output member and a two-speed gearset that is coupled to the drive member. The single planetary gearset includes a sun gear, a carrier gearset and a ring gear, wherein the carrier gearset is rotatably couplable to the input member and rotatably couplable to the output member, the sun gear is rotatably coupled to a rotor of the first torque machine, and the ring gear is rotatably couplable to the input member and rotatably couplable to the output member. The output member is rotatably couplable to the two-speed gearset, which is configured to operate in one of a first gear ratio and a second gear ratio.

An electric drive unit for a powertrain system including first and second drivelines and a primary propulsion system for translating rotational torque to the first driveline. A motor acts to generate rotational torque and a pinion is disposed in selective communication therewith. A differential is interposed between the pinion and the second driveline of for splitting torque therebetween. A first planetary is disposed between the motor and pinion, and a second planetary is disposed between the first planetary and pinion. A dog clutch interposed between the pinion and the planetaries is movable between a first position wherein torque from the motor is translated through the first planetary and the dog clutch to drive the second driveline at a first drive ratio, and a second position wherein torque from the motor is translated through both planetaries and the dog clutch to drive the second driveline at a second drive ratio.

An electric drive unit for a powertrain system including first and second drivelines and a primary propulsion system for translating rotational torque to the first driveline. A motor acts to generate rotational torque and a pinion is disposed in selective communication therewith. A differential is interposed between the pinion and the second driveline of for splitting torque therebetween. A first planetary is disposed between the motor and pinion, and a second planetary is disposed between the first planetary and pinion. A dog clutch interposed between the pinion and the planetaries is movable between a first position wherein torque from the motor is translated through the first planetary and the dog clutch to drive the second driveline at a first drive ratio, and a second position wherein torque from the motor is translated through both planetaries and the dog clutch to drive the second driveline at a second drive ratio.

In a differential that is part of a selectively disconnectable or connectable secondary powertrain, a clutch device allows the input member of the differential, via which driving power is introduced into the differential, to be uncoupled from the output members to which the driving power is forwarded in a branched manner in order to be able to completely shut off part of the secondary powertrain in the disconnected state.

An electrified fire fighting vehicle includes a chassis, a front axle coupled to the chassis, a rear axle coupled to the chassis, a water pump, an energy storage system, an engine, an electric motor coupled to the engine and the energy storage system, and a power divider positioned between the electric motor, the water pump, and the rear axle. The power divider facilitates selectively driving the water pump and the rear axle with the engine and the electric motor.

An electrified fire fighting vehicle includes a chassis, a tractive element coupled to the chassis, a pump having (a) an inlet configured to be fluidly coupled to a fluid source and (b) an outlet configured to be fluidly coupled to a fluid output, an electric motor configured to drive the pump to supply fluid received at the inlet from the fluid source to the fluid output, and a controller configured to control the electric motor to vary a speed of the electric motor to achieve a desired pressure of the fluid downstream of the pump while accommodating different inlet pressures of the fluid received at the inlet.

In a hybrid electric vehicle, (a) an engine and a first electric motor are disposed to be rotatable about a first axis, (b) a second electric motor, a reduction mechanism, and a differential gear are disposed to be rotatable about a second axis parallel with the first axis, (c) the second electric motor, a first planetary gear device, a second planetary gear device, and the differential gear are disposed in order from the first electric motor side to the engine side in the direction of the second axis, and (d) a second rotor shaft, a ring gear of the first planetary gear device, and a carrier of the second planetary gear device are respectively coupled to a sun gear of the first planetary gear device, a sun gear of the second planetary gear device, and the differential gear.