A hybrid vehicle includes an engine, battery, electric machine, and controller. The engine is configured to propel the vehicle. The electric machine is configured to draw energy from the battery to propel the vehicle and to recharge the battery during regenerative braking. The controller is programmed to, in response to operation of the electric machine to propel the vehicle while the vehicle is in a nominal vehicle operation mode and depletion of a battery charge to a nominal value, terminate operation of the electric machine and propel the vehicle via the engine. The controller further is programmed to, in response to operation of the electric machine to propel the vehicle while the vehicle is in a reserve vehicle operation mode and depletion of the battery charge to a reserve value that is greater than the nominal value, terminate operation of the electric machine and propel the vehicle via the engine.

Provided are a power generation control method for a vehicle configured to perform idling stop at a predetermined vehicle speed or less by a stop/start system, the vehicle including: a power generator configured to be driven by an internal combustion engine to generate power; and a battery to be charged by the power generated by the power generator, the power being generated in the vehicle under control so as to reduce an amount of fuel to be consumed by the internal combustion engine for power generation, the power generation control method including: detecting a charged and discharged state of the battery; and controlling the internal combustion engine to interrupt power generation involving fuel consumption when a charged state of the battery has recovered to a charged state before the idling stop through charging after the idling stop in accordance with the detected charged and discharged state.

A fail-safe method and apparatus for high voltage parts in a hybrid vehicle is provided. In the fail-safe method, it is determined whether or not a high voltage main relay is turned off. Here, when the high voltage main relay is turned off, a voltage is charged into a direct current (DC) link using a counter electromotive force generated in a motor generator linked with a revolution of an engine. Voltage control is performed such that the voltage of the DC link is uniformly maintained using an inverter for the motor generator.

A construction machine includes an engine, a load estimation unit that estimates a pump power absorption, a regeneration/powering power demand calculation unit that calculates a regeneration/powering power demand according to a state of charge in an electrical storage device, an engine power demand calculation unit that calculates an engine power demand based on the power absorption and regeneration/powering power demand, and a motor generator control unit that performs rotational speed control or torque control. The control unit includes a control switching unit that switches the rotational speed and the torque control according to the engine power demand and the rotational speed of the engine. The control switching unit switches from the torque control to the rotational speed control when during performance of the torque control, the engine power demand increases and the rotational speed of the engine becomes lower than a predetermined rotational speed.

A motor vehicle includes a hybrid drive having an internal combustion engine and an electric drive motor, and an air conditioning system having a compressor configured to compress a refrigerant, and an electric motor configured to operate the compressor and to start the internal combustion engine as electric starter when being coupled with the internal combustion engine. The electric motor has an inverter to operate the electric motor directly with high voltage of a high-voltage onboard electrical system of the motor vehicle so as to enable the electric motor to apply a mechanical torque for re-staring the internal combustion engine in case of need in the absence of any assistance from the electric drive motor. A clutch device mechanically couples the electric motor of the air conditioning system with the internal combustion engine in response to a control signal.

Various methods and systems are provided for an auxiliary power unit. In one embodiment, an auxiliary power unit comprises a plurality of independent modules configured to be installed in respective different locations within a rail vehicle or other vehicle. Each module of the plurality of independent modules is configured to carry out one or more respective functions of the auxiliary power unit for providing auxiliary power in the vehicle.

A control device that includes an electronic control unit that is programmed to: perform shift device shift control in order to change a speed ratio, which is a ratio of a rotational speed of the internal combustion engine to a rotational speed of the output member, by changing at least the shift speed that is established by the shift device; and perform differential gear shift control in in order to change the speed ratio by changing rotational speeds of the first rotary element and the second rotary element of the differential gear unit without changing the shift speed that is established by the shift device.

A through the road (TTR) hybridization strategy is proposed to facilitate introduction of hybrid electric vehicle technology in a significant portion of current and expected trucking fleets. In some cases, the technologies can be retrofitted onto an existing vehicle (e.g., a trailer, a tractor-trailer configuration, etc.). In some cases, the technologies can be built into new vehicles. In some cases, one vehicle may be built or retrofitted to operate in tandem with another and provide the hybridization benefits contemplated herein. By supplementing motive forces delivered through a primary drivetrain and fuel-fed engine with supplemental torque delivered at one or more electrically-powered drive axles, improvements in overall fuel efficiency and performance may be delivered, typically without significant redesign of existing components and systems that have been proven in the trucking industry.

Provided is a vehicle that can improve vehicle posture control or operation performance during accelerating turn. A vehicle is provided with: a left drive wheel and a right drive wheel connected to a motor; a required drive power amount input device for inputting a required drive power amount; and a required turn amount input device for inputting a required turn amount. The vehicle further includes a turn control device that adjusts a power difference between the left drive wheel and the right drive wheel on the basis of a time derivative value of the required drive power amount in addition to the required turn amount.

Through-the-road (TTR) hybrid designs using control strategies such as an equivalent consumption minimization strategy (ECMS) or an adaptive ECMS are implemented at the supplemental torque delivering electrically-powered drive axle (or axles) in a manner that follows operational parameters or computationally estimates states of the primary drivetrain and/or fuel-fed engine, but does not itself participate in control of the fuel-fed engine or primary drivetrain. BSFC type data particular to the paired-with fuel-fed engine allows an ECMS implementation (or other similar control strategy) to adapt to efficiency curves for the particular fuel-fed engine and to improve overall efficiencies of the TTR hybrid configuration.