A voltage controlled aircraft electric propulsion system includes an electric propulsion system. The voltage controlled aircraft electric propulsion system may include electric propulsors providing thrust for the aircraft. In hybrid systems, a gas turbine engine may also be included. The electric propulsion system may include at least one electric generator power source, at least one propulsor motor load, and at least one stored energy power source, such as a battery. The propulsor motor load may be supplied power from a power supply bus. The voltage of the power supply bus may be adjusted according to an altitude of the aircraft while maintaining a substantially constant current flow to the propulsor motor load. Due to the adjustment to lower voltages at increased altitude, insulations levels may be lower.

A method for controlling the torque available during the ratio changes of a drive train consisting of a heat engine (Mth) connected to a first input shaft (4) of a gearbox (1) that can transmit the torque of same to the wheels at different transmission ratios, a first electric machine (ME) connected to a second input shaft thereof, and a second electric machine (2) connected alternately to the first or second input shaft of the gearbox, characterised in that, during the changes in the transmission ratio of the heat engine (Mth), the second electric machine (2) operates in regenerative mode and transmits all of the electric power of same to the first electric machine (ME) that uses it to compensate for the reduction in torque at the driven wheel resulting from the temporary decoupling of the heat engine during the change in ratio of same.

A charge-discharge control system includes an electronic control unit. The electronic control unit is configured to: calculate an excess or shortage of a state of charge of the battery to a target state of charge as a state-of-charge difference; increase an output voltage of an electric power supply device when the shortage of the state of charge is larger than a first prescribed value; decrease the output voltage of the electric power supply device when the excess of the state of charge is larger than a second prescribed value; calculate an amount of change in the output voltage of the electric power supply device per unit time such that the amount of change in the output voltage of the electric power supply device per unit time is smaller when the calculated full charge capacity is low than when the calculated full charge capacity is high.

The control device of hybrid vehicle 1 comprises: a target state-of-charge setting part 42 configured to set a target state of charge which is a target value of a state of charge of the battery 20; and an output control part 41 configured to control outputs of the internal combustion engine 10 and the electric motor 16 so that the state of charge of the battery becomes equal to or more than the target state of charge when the hybrid vehicle is being driven outside a charging location. The target state-of-charge setting part is configured to set the target state of charge based on an amount of electric power required for the hybrid vehicle to reach the charging location by output of only the electric motor, and grade information of a road near the charging location.

Systems, methods and apparatus for controlling operation a hybrid powertrain are disclosed that use low power storage and motor/generator components in line haul operations. In one embodiment, a line haul drive cycle includes a low power motor/generator executing a power assistance operation of the hybrid powertrain powered by electricity from a low power storage responsive to a monitoring by a line haul controller of ascensions of the hybrid vehicle at or near a constant speed over an uneven terrain. The line haul drive cycle further includes the low power motor/generator executing a regenerative braking operation of the hybrid powertrain supplying captured electric energy to the low power storage responsive to a monitoring by the line haul controller of descensions of the hybrid vehicle at or near the constant speed over the uneven terrain.

A vehicle control apparatus includes: a transmission shifting control portion configured to implement a shifting action of a step-variable transmission by controlling a releasing coupling device and an engaging coupling device; a hybrid control portion configured to control an output torque of a first motor/generator and an output torque of a second motor/generator, based on an output torque of an engine and a transmitted torque to be transmitted through an initiative coupling device, such that a rotational acceleration value of the second motor/generator and a rotational acceleration value of the engine are changed along respective target trajectories during the shifting action; and a target-trajectory setting portion configured to set the target trajectories, based on a maximum charging amount of an electric power that is chargeable to an electric power storage device and a maximum discharging amount of the electric power that is dischargeable from the electric power storage device.

Disclosed herein a method for upshifting the transmission of a vehicle using shift entry prediction. The method may comprise predicting whether or not an upshift request of a vehicle will occur, determining whether or not a charge demand required for a battery through regeneration for upshift is greater than an allowable charge amount of the battery when the upshift request is predicted, controlling power consumption of the battery when the charge demand is greater than the allowable charge amount, and processing the upshift in response to an actual request of the upshift.

A control system for hybrid vehicles to prevent a reduction in a brake force when an electrical input to a battery is restricted. A controller is configured to execute a regeneration control to deliver a regenerative torque resulting from operating second motor as a generator to the drive wheels, and an engine brake control to deliver a brake torque resulting from a power loss of an engine to the output member. The controller is further configured to select an HV-Lo mode when an input power allowed to accumulate in the battery is smaller than a threshold power.

A hybrid vehicle includes an electric control unit. A predictable condition may be a condition that the time period from beginning of a charging of a battery to beginning of a rapid decrease in charged electricity is predicted to be within a specified time period. The electronic control unit may be configured to control a first motor such that a motoring of an engine is performed at a first speed by the first motor. The electronic control unit may be configured to prevent motoring of the engine by the first motor when the predictable condition is not satisfied. The electronic control unit may be configured to control the first motor such that the motoring of the engine is performed at a second speed that is higher than the first speed by the first motor when the predictable condition is satisfied.

A motive power system includes a first energy storage, a second energy storage, an actuator, an internal combustion engine, a power transmission circuit, and circuitry. The circuitry is configured to control the power transmission circuit in a charge-depleting mode such that the first energy storage supplies to the actuator a first electric energy that is stored in the first energy storage with a first charge rate range and the second energy storage supplies to the actuator a second electric energy that is stored in the second energy storage with a second charge rate range. The first charge rate range is larger than the second charge rate range.