A vehicle control device includes a control unit configured to obtain information relating to a drive state of a vehicle, calculate a requirement torque, compute a first target torque, a second target torque, and an ideal change rate of a total torque of the first drive torque and the second drive torque, and at least control a magnitudes of the first drive torque and the second drive torque outputted from the first drive unit and the second drive unit. The control unit is configured to control the first drive unit to operate a first zero-cross process and control the second drive unit to operate a second zero-cross process after the first zero-cross process ends.

A vehicle includes a traction battery and a controller. The controller, responsive to a command to enter a highway, confirmation the traction battery can output power to accelerate the vehicle to enter the highway via an entrance at a same speed as traffic on the highway in a vicinity of the entrance, and an increase in temperature beyond a threshold of the traction battery predicted to occur on the highway due to expected commands to maintain the same speed on the highway with power from the traction battery, increases cooling of the traction battery prior to entering the highway.

An electric drive train for a pure electrically operated vehicle includes an electric motor with a motor shaft and a start-up support unit mechanically connected to the motor shaft configured to convert a motor speed and a motor torque of the motor shaft into an output speed and an output torque such that the output speed is lower than the motor speed and/or the output torque is higher than the motor torque. Also, a method of operating an electric drive train during a start-up process includes increasing a start-up motor speed and a start-up motor torque of a motor shaft of an electric motor, converting the start-up motor speed and the start-up motor torque into a start-up output speed and a start-up output torque with a start-up support unit, and closing a lock-up clutch of the start-up support unit.

A vehicle drive system including: a rotating electric machine; an output drivingly coupled to a wheel; a differential gear device provided in a power transmission path between the rotating electric machine and the output, the differential gear device including at least a first rotating element drivingly coupled to the rotating electric machine, a second rotating element drivingly coupled to the output, and a third rotating element that is selectively fixed by a one-way clutch to a non-rotating member and that is selectively fixed by a friction brake to the non-rotating member; and a clutch that selectively couples together two of the first rotating element, the second rotating element, and the third rotating element.

A system and a method for reducing the acceleration shock of an electric motor vehicle are provided. A backlash torque range is determined based on a coast down value indicating the motor torque for maintaining a vehicle speed. A slope of the motor torque that falls within a backlash torque range is reduced and corrected, considering that the motor torque for causing backlash is changed as the motor speed changes, thereby reducing the shock due to the backlash at the acceleration (start-up) of a vehicle.

A traction control device and method for a four-wheel drive electric vehicle are disclosed. When the drive wheels of an electric vehicle spin, a drive force of the electric vehicle is controlled so as to restrain the spinning of the drive wheels and to secure the starting performance and acceleration performance of the electric vehicle.

An electric vehicle includes first and second traveling motors, first and second rotational position sensors, and a measurement controller. The first rotational position sensor detects a rotation angle of the first traveling motor and has a first wheel-speed range in which a deviation of an original position of the first rotational position sensor is measurable. The second rotational position sensor detects a rotation angle of the second traveling motor and has a second wheel-speed range in which a deviation of an original position of the second rotational position sensor is measurable. The second wheel-speed range differs from the first wheel-speed range. The measurement controller executes, in an execution order, measurements of the deviations of the original positions of the first and second rotational position sensors while the electric vehicle is traveling, and switch the execution order on the basis of acceleration or deceleration data of the electric vehicle.

A controller (104) for controlling torque generated by at least one traction motor (116a, 116b) of a vehicle (100) before a vehicle launch, comprising: means to determine that torque demand increases while simultaneously at least one brake (111) of the vehicle is in an applied state; means to, in dependence on the determination, limit torque generation by the traction motor in response to torque demand; and means to remove the limit in dependence on release of the at least one brake.

Method and apparatus for power mode control for electric propulsion vehicles are provided that include a sensor to detect a vehicle door cycle, a processor to establish an occurrence of a vehicle motion, a processor operative to initiate a timer having a default time duration in response to the occurrence of the vehicle motion and the vehicle door cycle and to generate a user prompt to extend the default time duration, the processor being further operative to transition an operating mode to a shutdown mode in response to an expiration of the time, and to extend to the default time duration in response to the user input, and a display operative to display a user interface in response to the user prompt and to receive a user input indicative of a request to extend the default time duration of the timer and to couple the user input to the processor.

An electrified vehicle system includes an electric motor coupled to a drive wheel via a plurality of power transmission components and a control device. The control device is configured to act as: a feedforward control section configured based on a transfer function simulating vibration transmission characteristics of a power transmission system, receiving as an input a required torque of the electric motor from a driver, and outputting a base command torque of the electric motor; a timing estimation section estimating, based on information on the power transmission system, a timing at which a backlash between the plurality of power transmission components is eliminated; and a torque correction section applying, to the base command torque, a correction torque for reducing a vibration generated in the power transmission system due to elimination of the backlash, in response to an arrival of the timing estimated by the timing estimation section.