A vehicle driving force control apparatus that is provided in a vehicle provided with drive units configured to drive a driving wheel, and that is configured to control the drive units includes: a controller; and a determiner. The controller controls a driving force output by each of the drive units, within a range less than or equal to an upper limit value, on a basis of a driving command. The determiner determines whether each of the drive units is in a restriction-necessary state.

A hybrid electric vehicle and a braking control method thereof are provided. The method includes determining, by a first controller, a total braking amount corresponding to a brake pedal manipulation amount and transmitting a regenerative braking request corresponding to at least a portion of the total braking amount to a second controller. A state of a regenerative braking system having a motor and a battery is determined and a regenerative braking execution amount is calculated by selectively using a first torque corresponding to a torque command transmitted to a third controller to operate the motor based on the regenerative braking request or a second torque measured by the third controller based on the determined state. A braking force of a frictional brake is determined based on the calculated regenerative braking execution amount and the total braking amount.

A heat exchange system for a vehicle includes: a first cooling circuit (L1-1, L1-2) is configured to cool an internal combustion engine a second cooling circuit (L2-1, L2-2) is configured to cool a driving electric motor outputs a driving force; a first heat exchanger (106) is configured to exchange heat between the first cooling circuit and the second cooling circuit; a first sensor (151) is configured to detect a temperature of the first cooling circuit; a second sensor (152) is configured to detect a temperature of the second cooling circuit; and a controller (155) is configured to execute control of performing heat exchange between a coolant in the first cooling circuit and a coolant in the second cooling circuit using the first heat exchanger when the temperature detected by the first sensor is lower than the temperature detected by the second sensor.

A power conversion device control system includes a power conversion device configured to supply electric power to a rotary electric machine, and a control device configured to control the power conversion device, wherein the control device controls the power conversion device through synchronous control in which a carrier frequency of the power conversion device is proportional to a rotational speed of the rotary electric machine when a temperature of a permanent magnet provided in the rotary electric machine is higher than a predetermined threshold value, and controls the power conversion device through non-synchronous control in which a carrier frequency of the power conversion device is not proportional to a rotational speed of the rotary electric machine when a temperature of the permanent magnet is the predetermined threshold value or less.

An apparatus for controlling an environment-friendly vehicle, a system having the same, and a method thereof are provided. The apparatus includes a processor to perform a control operation to expand an operable area based on a motor efficiency gain and a state of charge (SOC) of a battery in an Homogeneous Charge Compression Ignition (HCCI) operation or a lean burn operation, and a storage to store the motor efficiency gain and the SOC of the battery, which are acquired by the processor.

A vehicle control device includes: a motor information acquisition unit, a transmitting unit, a receiving unit and a motor controller. The motor information acquisition unit is configured to acquire motor information about a motor for driving a vehicle with the motor being in a predetermined state. The transmitting unit is configured to transmit the acquired motor information to an external server. The receiving unit is configured to receive an adaptive value of a motor control parameter. The adaptive value is adapted by the server on a basis of the motor information. The motor controller is configured to control the motor on a basis of the received adaptive value.

A system and method of controlling regenerative braking of an eco-friendly vehicle are provided. The system eliminates a motor over-temperature state during regenerative braking, effectively prevents a chattering phenomenon in which regenerative braking torque is repeatedly increased and reduced after the motor over-temperature state, and consequently, improves the braking safety and operability of the vehicle. A torque output rate for motor regenerative braking torque limitation is determined from a current motor load and motor temperature using setting information when a motor over-temperature state is detected. Then, a final regenerative braking torque is determined by multiplying a motor regenerative braking torque, calculated from information including battery chargeable power and a driver braking operation value, by the determined torque output rate. Thereafter, regenerative braking of a motor is adjusted based on the determined final regenerative braking torque.

A system for controlling the speed of a hybrid work machine that has an engine assembly, an electric drive system mechanically coupled to the engine assembly, a drive mechanism configured to be driven by the electric drive system, and a controller in communication with the engine assembly, the electric drive system, and the drive mechanism. Wherein, the controller selectively engages the engine assembly, the electric drive system, and the drive mechanism to execute a braking function.

A vehicle includes a gear mechanism connected to a driving wheel; a traveling electric motor configured to exchange heat with a heat exchange medium shared by the gear mechanism and output motive power to the driving wheel via the gear mechanism; and a controller configured to change an operating point of the traveling electric motor to a stronger field side rather than a maximum efficiency point in a case that a temperature of the heat exchange medium is less than a predetermined temperature.

Methods and systems are provided for estimating a maximum available torque reserve prior to a gear upshift and then during the upshift, generating the torque reserve to fill a torque hole. In one example, a method may include estimating a maximum torque reserve based on each of a driver torque demand, an auxiliary system demand, and a maximum generable engine torque and then opportunistically generating the torque reserve.