A hybrid vehicle includes a planetary gear mechanism, a first electric motor, an internal combustion engine, first drive wheels, an inter-element clutch, a second electric motor, and second drive wheels. The planetary gear mechanism is configured to transmit motive power among first to third rotary elements. The first electric motor is coupled to the first rotary element in a power transmittable manner. The internal combustion engine is coupled to the second rotary element in a power transmittable manner. The first drive wheels are coupled to the third rotary element in a power transmittable manner. The inter-element clutch is configured to switch between coupling and uncoupling two of the first to third rotary elements. The second electric motor is configured to perform power running operation using power generated by the first electric motor. The second drive wheels are coupled to the second electric motor in a power transmittable manner.

A drive force control system for a vehicle configured to change a torque to propel a vehicle certainly in a required amount by controlling output torques of an engine and a motor. A controller is configured to: calculate a required amount of change in synthesized torque of an engine torque and a motor torque; calculate a required amount of change in the engine torque and a required amount of change in the motor torque based on the required amount of change in the synthesized torque; select one of the engine and the motor whose torque will be changed further than a limit value; and adjust the torque of the selected prime mover by a counter torque.

Provided is a vehicle capable of suppressing vibration of a drive unit having an engine and a motor to be small and having high vehicle motion performance. The drive unit for travel of the vehicle includes an engine and a motor. The engine is a rotary engine and has an engine output shaft and an engine housing. The motor has a motor output shaft, a rotor, and a stator that are accommodated in a motor housing. The engine housing of the engine and the motor housing of the motor are directly joined to each other. The engine output shaft and the motor output shaft are directly joined to each other. The rotor of the motor has: a main body section that generates a rotational magnetic field with the stator; and a weight section that functions as a balance weight of the engine.

Aspects of the present invention relate to a method and to a control system for controlling an engine and an electric traction motor of a vehicle, the control system comprising one or more controllers, wherein the control system is configured to: receive an indication of engine speed during engine idling; and control the electric traction motor to reduce a difference between the engine speed and an engine idle speed target

A device for controlling an electronic four-wheel drive (E-4WD) of a vehicle includes: a first powertrain for a front wheel, where the first powertrain includes an engine, and a front wheel motor; and a second powertrain for a rear wheel, where the second powertrain includes a rear wheel motor. The device provides a rear wheel motor driving mode, a front wheel motor driving mode, a combined driving mode in which the front wheel motor and the rear wheel motor are both driven, and an engine-on mode according to driver power demand for the vehicle, such that fuel efficiency of the vehicle is improved.

Disclosed are a hybrid vehicle torque adjusting method and device. The method includes: acquiring a requested torque of a front-axle engine and a requested torque of a rear-axle motor, determining a first compensation torque according to the filtered requested torque of the front-axle engine and an actual output torque of a front-axle transmission, and determining a target torque of the rear-axle motor according to the first compensation torque and the requested torque of the rear-axle motor. In the method, since a difference exists between the filtered requested torque of the front-axle engine and the actual output torque of the front-axle transmission during shifting of the front-axle transmission, after the difference is compensated by the rear-axle motor, a working condition that affects a dynamic performance of an entire vehicle can be eliminated, torques can be coordinated, and the dynamic performance of the entire vehicle can be improved.

A control system for a vehicle that executes a feedback control properly to adjust a speed of a predetermined rotary member to a target speed. A controller is configured to: calculate an amount of change in a torque applied to the rotary member by one of the torque devices, in accordance with operating conditions of the torque devices; and calculate an amount of change in the torque applied to the rotary member by another one of the torque devices, based on a target amount of change in a synthesized torque of the torques of the torque devices and the amount of change in the torque applied to the rotary member by one of the torque devices.

Aspects of the present invention relate to a method and to a control system for maintaining multi-axle drive capability in a vehicle, the method comprising: operating an internal combustion engine to provide a torque to a first axle of the vehicle, and to a first electric machine to generate electrical power; controlling the generation of electrical power by the first electric machine in dependence on a requirement for torque at a second axle of the vehicle; and operating a second electric machine to receive the electrical power generated by the first electric machine and provide the torque to the second axle.

Embodiments of the present invention provide an electric machine control system for a vehicle, the electric machine control system comprising one or more controllers, wherein the vehicle comprises an electric machine arranged to be selectively coupleable to provide torque to at least one wheel of an axle of the vehicle, the control system comprising input means to receive (1110) a fault-derived coupling state request (430) signal and (1120) at least one further coupling state request signal, wherein each coupling state request signal is indicative of a request for a coupling state of the electric machine to the at least one wheel of the axle, processing means arranged to determine (1130) the coupling state of the electric machine to the at least one wheel of the axle in dependence on the fault-derived coupling state request signal (430) and the at least one further coupling state request signal, wherein the processing means is arranged to determine the coupling state of the electric machine in precedence on the fault-derived coupling state request signal over the at least one further coupling state request signal, and output means arranged to output (1140) a coupling signal indicative of the determined coupling state to control coupling of the electric machine to the at least one wheel of the axle.

A vehicle drive device includes a first drive unit that drives first wheels; a second drive unit that drives second wheels; and a control device. When the state of charge of an electrical storage device is less than a first threshold value and a vehicle speed is less than a second threshold value, the control device performs control such that when the vehicle speed is greater than or equal to zero and required drive power is greater than or equal to zero, the operating mode of the first drive unit is set to a second mode to output the required drive power from the second drive unit, and when the vehicle speed is greater than zero and the required drive power is less than zero, the operating mode of the first drive unit is set to a first mode so the first drive power source can generate electric power.