A hybrid vehicle drive system for a vehicle includes a first prime mover, a first prime mover driven transmission, and a rechargeable power source. The hybrid vehicle drive system further includes an interface between the transmission and the prime mover for coupling to an electric motor. The electric motor can be in direct or indirect mechanical communication with a hydraulic pump. The electric motor can receive power from the prime mover driven transmission through the interface.

Systems and methods for driving an accessory of a vehicle. The system includes a power take-off (PTO) device, a mechanically driven accessory, a battery, and power conversion circuitry electrically connected to the battery. The system also includes a first electric motor mechanically coupled to the PTO device and a second electric motor mechanically coupled to the mechanically driven accessory. The system further includes an engageable mechanical connector that, when engaged, mechanically couples the PTO device and the mechanically driven accessory. The system performs operations including engaging the engageable mechanical connector when a speed of the PTO device is within a predetermined speed range; disengaging the engageable mechanical connector when the speed of the PTO device is outside the predetermined speed range; and based on disengaging the engageable mechanical connector, providing electric power to the second electric motor to generate and transfer mechanical energy to the mechanically driven accessory.

A fire fighting vehicle includes a powertrain including an engine, a battery pack, and an electromechanical transmission; a power divider; and a controller. The power divider is positioned between the engine, the pump, and the electromechanical transmission. The controller is configured to monitor a state-of-charge of the battery pack and operate the engine, the power divider, and the electromechanical transmission such that the state-of-charge is maintained above a minimum state-of-charge threshold that is sufficient to facilitate (i) accelerating the fire fighting vehicle to a driving speed of at least 50 miles-per-hour in an acceleration time and (ii) maintaining or exceeding the driving speed for a period of time. An aggregate of the acceleration time and the period of time is at least three minutes.

An example system includes a motive application having a prime mover, a load, a driveline, and a motor/generator that couples to the driveline. The system includes a number of batteries, and a battery assembly that electrically couples the batteries to the motor/generator. The battery assembly includes a power interface positioned at a first end of the battery assembly, the power interface including a low voltage coupling and a high voltage coupling, and a service electrically interposed between the batteries and the power interface. The service disconnect in a first position couples at least one of the batteries to the first low voltage coupling and couples the batteries to the second high voltage coupling. The service disconnect in a second position de-couples the batteries from the low voltage coupling and the high voltage coupling.

A hybrid multi-mode power take off system (PTO) installed on a vehicle includes an internal combustion engine, a first electric reversible electric machine, a second electric reversible electric machine and one epicyclical gear train connectable with the engine and the first and second reversible electrical machines using a number of clutches. An electronic control unit controls the closure/opening of clutches to implement different operating modes. The electronic control unit is configured to control the transfer of energy between the first and the second reversible electric machines when one reversible electric machine is operating as a motor and the other is operating as a generator.

A system for handling disengagement and engagement between a PTO system and a traction system in an at least partly electrically operated vehicle. The system is adapted to disengage the PTO system and the traction system from each other when the at least partly electrically operated vehicle is in driving mode. The system is adapted to engage the PTO system and the traction system to each other and thereby providing electrical power from the system to at least one external load when the at least one electrically operated vehicle is in stop mode.

A method for shifting a PTO transmission includes selecting a PTO output speed from one of a first PTO speed and a second PTO speed of the PTO transmission, operating the PTO transmission in a reduced power mode at the selected PTO speed, the reduced power mode providing lower power to the PTO transmission at the selected PTO speed than a normal operating mode, comparing an instantaneous drive power to a maximum drive power in the reduced power mode, and when the instantaneous drive power exceeds the maximum drive power, automatically shifting the PTO transmission under load from the reduced power mode to the normal operating mode and automatically adjusting a transmission ratio of a vehicle transmission.

An example system includes a motive application having a prime mover, a load, a driveline, and a motor/generator that couples to the driveline. The system includes a number of batteries, and a battery assembly that electrically couples the batteries to the motor/generator. The battery assembly includes a power interface positioned at a first end of the battery assembly, the power interface including a low voltage coupling and a high voltage coupling, and a service electrically interposed between the batteries and the power interface. The service disconnect in a first position couples at least one of the batteries to the first low voltage coupling and couples the batteries to the second high voltage coupling. The service disconnect in a second position de-couples the batteries from the low voltage coupling and the high voltage coupling.

Systems and methods are disclosed herein for adaptive power take-off (PTO) droop control for a self-propelled work vehicle having an engine and a PTO device directly mechanically coupled to the engine. The systems and methods enable user selection of at least one of a target ground speed or a target power take off (PTO) speed. The systems and methods are responsive to at least one of the selected target ground speed or the selected target PTO speed to identify a maximum transmission ground drive efficiency corresponding to an effective droop value within a defined droop range. The systems and methods control an actual engine speed and an actual transmission ratio to respective adjusted target values corresponding with the maximum transmission ground drive efficiency.

A hybrid mower includes a chassis coupled to a body. The chassis has a plurality of wheels coupled to a steering assembly for navigating directional control. The mower also includes an internal combustion engine disposed on the chassis. The internal combustion engine is coupled to a drive assembly providing rotational operation to at least one of the plurality of wheels. The mower further includes a mower deck housing at least one rotatable blade for cutting undesired undergrowth during operation and an electric blade control system. The electric blade control system has an electronic control unit for enabling the at least one rotatable blade during operation and at least one direct current motor positioned about the mower deck and in communication with the electronic control unit. The at least one direct current motor has a motor shaft coupled to the at least one rotatable blade.