Methods and systems are provided for a estimating a drive train temperature for a journey. In one example, a method comprises requesting a vehicle operator to input one or more travel parameters for the journey, predicting travel parameters the vehicle operator omitted to input, and displaying an estimated fuel economy for the journey, where the estimated fuel economy is based on the estimated drive train temperature, which is based on the travel parameters.

A mode transition control device a hybrid vehicle has a transmission control unit that prevents a second power generation system from overheating while traveling in a series HEV mode. When a battery is at a power generation request threshold value or lower, the vehicle travels in a series HEV mode, in which the first electric motor is utilized as a drive source and receives electrical power from the second motor/generator and the battery. The transmission control unit controls the traveling mode to transition from the series HEV mode to a parallel HEV mode when the vehicle speed has reached a switchover vehicle speed. When a temperature rise of the second power generation system is predicted while traveling in the series HEV mode, the transmission control unit changes the switchover vehicle speed to a slower switchover vehicle speed that was used prior to a determination of the temperature rise.

A method for generating driving instructions for the driver of an electrically driven vehicle includes the following steps: (a) acquire route information for at least one route section of a driving route lying ahead of the vehicle, (b) determine temperature information, acting in a temperature-varying fashion on at least one drive component, for the at least one route section on the basis of the route information, and (c) output a driving instruction to the driver on the basis of the temperature information for the at least one route section.

The present disclosure provides a system and a method of controlling motor temperature for a green car including: a drive motor as a power source; a battery configured to provide a driving voltage to the drive motor; a water pump configured to supply coolant to the drive motor to cool the drive motor; a data detector configured to detect data regarding a driving state of the green car; and a vehicle controller configured to determine a driving mode based on the data regarding the driving state, to determine pump control rotation speed based on the driving mode, SOC of the battery, or motor temperature of the drive motor, and to operate the water pump based on the pump control rotation speed to change flow rate of the coolant supplied to the drive motor.

A system and a method of controlling a drive motor for a vehicle is disclosed. The system of controlling a drive motor for a vehicle may include: an engine and the drive motor as power sources; a data detector detecting a state data for controlling the drive motor; and a vehicle controller setting a motor demand power and a gear stage based on the state data. In particular, the vehicle controller generates a motor demand torque based on the motor demand power and the gear stage, checks a motor temperature after driving the drive motor based on the motor demand torque, and changes the gear stage based on the motor temperature.

A hybrid vehicle includes an engine, a motor, an inverter, an electric power storage device, a transmission, and an electronic control unit. The electronic control unit is configured to perform control such that the inverter regeneratively drives the motor, when the electrical system temperature is equal to or higher than a predetermined temperature, set an amount of change of a gear ratio to a down-shift side based on an electrical system temperature and regenerative torque of the motor, and set target gear ratio such that the gear ratio changes to the down-shift side by the amount of change.

A vehicle includes a motor positioned between an engine and a driveline connected to a vehicle wheel, and a controller. The controller controls engine torque and maintains motor torque during wheel torque and driveline component torque reversals to limit a vehicle output torque rate of change through a lash region associated with a range of driveline torque ratios. A method of controlling a hybrid vehicle includes controlling engine torque to a specified profile and maintaining motor torque at a generally constant value during at least one of wheel torque and driveline component torque reversals to limit a vehicle output torque rate of change through a lash region associated with a range of driveline torque ratios.

Systems and methods of providing a configurable powertrain in a vehicle are disclosed. The powertrain is capable of operating in a plurality of powertrain configurations and includes one or more reversible generators, a battery system, a motor/generator (M/G), and one or more drive axles. The generators generate and supply electrical power to the battery system, the M/G, an external power source, or a combination thereof. The battery system selectively supplies electrical power to the generators, the M/G, the external power source, or a combination thereof. The one or more generators also selectively supply cooling to the battery system, a cab of the vehicle, a trailer or external enclosure or structure of the vehicle, or a combination thereof. The powertrain configurations of the vehicle include operating the components of the powertrain in various combinations based on demands of the vehicle and/or external power sources or structures.

In a hybrid vehicle, the warm-up of a battery (2) is controlled in consideration of the SOC of battery (2) and the temperature of battery (2). That is, in the hybrid vehicle, for example, when the SOC of battery (2) reaches a preset predetermined value and the output of battery (2) is lower than a first threshold value, a first control valve (8) is opened to perform the heat exchange between a first cooling water and a second cooling water by a heat exchanger (6). Consequently, in the hybrid vehicle, the second cooling water in a second cooling path (4) is warmed by the first cooling water in a first cooling path (3) to warm up battery (2), thereby suppressing a decrease in output of battery (2) due to a temperature decrease in battery (2).

Systems and methods for improving hybrid vehicle cooling are presented. In one example, an electric pump may supply transmission fluid to a transmission and a driveline integrated starter/generator to cool, operate, and lubricate driveline components. The electric pump may be selectively operated to conserve energy and to supply driveline cooling when driveline cooling may be desirable.