A vehicle propulsion system includes a plurality of power sources coupled to a final drive of the vehicle propulsion system. A controller is programmed to determine a desired power demand from the power sources and operate a number of the power sources to produce the desired power demand. The controller identifies a least efficient power source of the power sources and controls the least efficient power source to produce power at an optimum operating point of the least efficient power source. The controller also identifies a power output of the least efficient power source corresponding to the optimum operating point, compares the power output of the least efficient power source to the desired power demand, identifies a remaining power demand from the comparison, and controls another power source to produce the remaining power demand.

In a hybrid automobile in which a first motor, an engine, and a drive shaft coupled to an axle are connected respectively to a sun gear, a carrier, and a ring gear of a planetary gear set and a second motor is connected to the drive shaft, during a predetermined travel period in which the engine is operative and respective gates of a first inverter and a second inverter used to drive the first motor and the second motor are both blocked, the engine is controlled such that the first motor rotates at a predetermined rotation speed, and a boost converter is controlled such that a voltage of a drive voltage system power line reaches a target voltage corresponding to an accelerator depression amount.

Disclosed is a hybrid work vehicle capable of smooth work travel using a work device with a low output internal combustion engine, while avoiding battery exhaustion. The vehicle includes an internal combustion engine that supplies drive power to a travel device and a work device via power transmission means, a motor generator that is driven by a battery, a load information generation part that generates load information representing a sudden increase in rotational load, an assist characteristic determination part that determines motor assist characteristics defining an assist amount and an assist time period of assist control based on load information, and a motor control unit that controls the motor generator based on the motor assist characteristics.

Disclosed is a hybrid work vehicle capable of smooth work travel using a work device with a low output internal combustion engine, while avoiding battery exhaustion. The vehicle includes an internal combustion engine that supplies drive power to a travel device and a work device via power transmission means, a motor generator that is driven by a battery, a load information generation part that generates load information representing a sudden increase in rotational load, an assist characteristic determination part that determines motor assist characteristics defining an assist amount and an assist time period of assist control based on load information, and a motor control unit that controls the motor generator based on the motor assist characteristics.

Methods and systems are provided for synergizing the benefits of an electric fuel separator in a hybrid vehicle system. A vehicle controller may hold the engine in a narrow operating range where usage of a selected higher octane or lower octane fuel fraction is optimal while using motor and/or CVT adjustments to address transients generated as driver demand varies. The controller may also adjust a fuel separator speed/pressure opportunistically during regenerative braking to maximize electrical usage as well as at low load conditions to enable extended engine operation in a more fuel efficient load region.

A drive train (1) includes an internal combustion engine (2) and working hydraulics (4) having at least one hydraulic pump (7). When operated as a pump, the hydraulic pump (7) sucks hydraulic fluid from a tank (9) and delivers into a delivery line (10) that leads to the working hydraulics (4). When operated as a motor, the hydraulic pump (7) is supplied with hydraulic fluid from a hydraulic accumulator (25). The drive train (1) has a charge pump (20) to supply a charging circuit (23). The charge pump (20), when operated as a pump, sucks hydraulic fluid out of the tank (9) and delivers into a charge pressure line (22) that leads to a charging circuit (23), and the charge pump (20) when operated as a motor is supplied with hydraulic fluid from the hydraulic accumulator (25).

An electric power supply system configured to supply electric power to an electrical load device in accordance with a current requirement. The electric power supply system includes an engine configured to output rotational power, a generator configured to receive the rotational power and to supply a current to the electrical load device. The generator includes a rotor, and a stator including a winding and a stator core with the winding wound thereon, a magnetic circuit for the winding passing through the stator core, and a supply current adjustment device configured to adjust magnetic resistance of the magnetic circuit for the winding, to thereby change an inductance of the winding to adjust the supplied current. The electric power supply system further includes a control device configured to control the engine to adjust the output rotational power and to control the supply current adjustment device to adjust the inductance of the winding.

A system for controlling an operating point of a power source for a propulsive e-machine in a hybrid electric vehicle, including: a power train including a power source and at least one propulsive e-machine, wherein the power source includes an integrated starter generator and an internal combustion engine; at least one desired operating point for the power source including at least one characteristic parameter; an operating point component configured to query the at least one desired operating point and to selectively distribute the control of the at least one desired operating point to a control of the internal combustion engine or to a control of the integrated starter generator control.

A system for a driving mode conversion of a vehicle is provided. The system includes a driving information detecting unit that detects driving information based on a vehicle driving using sensors within the vehicle. A driving propensity determining unit determines a driving propensity based on average vehicle speed and a position variation of accelerator and brake pedals. A predicting unit learns an acceleration and deceleration prediction model based on the driving information, and generates a near future intention prediction value to which a vehicle driving environment and the driving propensity are reflected utilizing the prediction model. A controller determines whether an engine starting is performed by calculating current required power of a driver based on a pedal position value, and determines whether the engine starting is performed by comparing the near future acceleration and deceleration intention prediction value with the position value of the pedal.

An ECU sets a voltage of an inverter side in an external supply mode to be less than a voltage of the inverter side when a first MG supplies the electric power equal to the electric power in the external supply mode in a traveling generation mode.