An exemplary method generally involves determining a hazard parameter for a tracked vehicle including a ground interface assembly. The ground interface assembly generally includes a track and a drive wheel operable to move the track to thereby propel the tracked vehicle. A load sensor senses a load carried by the tracked vehicle, and a speed sensor senses a vehicle speed of the tracked vehicle. A control system in communication with the load sensor, the speed sensor, and a temperature sensor determines the hazard parameter based upon the load, the vehicle speed, and an ambient temperature in a vicinity of the tracked vehicle. The control system compares the hazard parameter to a threshold parameter, and performs an action based upon the comparison.

A cooling system includes: (a) a first pump to be driven with vehicle running; (b) a lubricating passage for supplying the lubricant from the first pump, to a lubrication-required part; (c) a second pump to be driven by a drive source other than a drive source of the first pump; (d) a cooling passage for supplying the lubricant from the second pump, to a rotary electric machine via a heat exchanger provided in the cooling passage; (e) a connecting passage connecting between the lubricating passage and the cooling passage, and (f) a lubricant distribution portion configured to change a connecting-passage flowing amount of the lubricant that flows through the connecting passage, depending on a temperature of the lubricant, such that a ratio of the connecting-passage flowing amount to a lubricating-passage flowing amount of the lubricant that flows through the lubricating passage is increased with increase of the lubricant temperature.

A weight ratio of each driving wheel of the vehicle at the time of automatic driving is calculated, a front and rear distribution ratio of a driving force of the vehicle is calculated from the weight ratio, a rear wheel plan driving force is calculated from the front and rear distribution ratio and an action plan required driving force, and a temperature of a rear wheel motor is estimated. Then, when the estimated attainment temperature of the rear wheel motor is higher than the upper limit value of the temperature, the front and rear distribution ratio is changed within a range in which excessive slip does not occur at the front wheels, the rear wheel plan driving force is recalculated, and the automatic driving of the vehicle is implemented taking the rear wheel plan driving force as a target driving force.

A method for operating a drive train of a motor vehicle, which utilizes at least one permanent-magnet electric machine (EM) as a motor vehicle drive source, is provided. A transmission (G) with different gear ratios is arranged in a power path between the electric machine (EM) and driving wheels (DW) of the motor vehicle. A power converter (LE) is associated with the electric machine (EM) and can operate the electric machine (EM) in a field weakening condition. The method includes prematurely carrying out, delaying, or preventing a changeover of the gear step of the transmission (G) specified by a driving strategy depending on a temperature value of the electric machine (EM) in order to reduce, not increase, or increase with delay a rotational speed of the electric machine (EM). An electronic control unit (ECU) for carrying out the method and a motor vehicle with the control unit (ECU) are also provided.

A hybrid vehicle control apparatus including a torque converter temperature detector detecting a torque converter temperature, a rotor temperature detector detecting a rotor temperature, a stator temperature detector detecting a stator temperature, and an electronic control unit including a microprocessor. The microprocessor is configured to perform controlling an engine, a transmission, a lockup clutch, a motor-generator and a stator cooling device based on the torque converter temperature detected by the torque converter temperature detector, the rotor temperature detected by the rotor temperature detector and the stator temperature detected by the stator temperature detector so that the torque converter temperature is equal to or lower than a first predetermined temperature, the rotor temperature is equal to or lower than a second predetermined temperature and the stator temperature is equal to or lower than a third predetermined temperature.

Methods and systems are provided for operating a driveline of a hybrid vehicle during conditions when a temperature of a motor/generator is increasing. In one example, a method is provided that adjusts engine speed as a function of motor/generator temperature while maintaining engine power output when driver demand wheel power is constant.

A system for controlling a charging torque of a hybrid vehicle may include: a first motor connected to an engine and configured to charge an energy storage system using a first charging torque generated from the engine; a second motor connected to the engine and configured to charge the energy storage system using a second charging torque generated from the engine; a plurality of sensors respectively sensing operation states of the first motor and the second motors; and a controller configured to obtain an entire charging torque generated from the engine and to determine distribution amounts of the first charging torque and the second charging torque from the entire charging torque or to adjust the entire charging torque according to the operation states of the first motor and the second motor.

An ECU executes a process including a step of setting an upper limit value in a case where a gear shift position is a traveling position, a vehicle is stopped, the vehicle is in a brake-on state, and a cancellation request flag is in an OFF state, and a step of canceling the setting of the upper limit value in a case where the cancellation request flag is in an ON state.

A controller for a motor vehicle (1) has an internal combustion engine (3), a transmission (4), and a cooling device (5) with a coolant (5b) for cooling the internal combustion engine (3), wherein the controller (2) is configured to determine a target minimum rotational speed for the internal combustion engine (3) on the basis of the temperature of the internal combustion engine (3) and/or the temperature of the coolant (5b) and to determine a target gear setting on the basis of the target minimum rotational speed.

A control apparatus of an electric vehicle including a motor capable of outputting a vehicle driving force that is a driving force acting on the electric vehicle, and a brake device configured to generate a vehicle braking force that is a braking force acting on the electric vehicle in accordance with a brake operation performed by a driver, includes: a controller. The controller is configured to start a first hill-hold control for maintaining the electric vehicle in a stopped state by using the vehicle driving force generated by the motor as a stopping force for stopping the electric vehicle when the brake operation is interrupted.