ELECTRIC VEHICLE AND METHOD OF CONTROLLING SAME, FOR PREHEATING OF LUBRICANT

摘要

In an electric vehicle, an automatic transmission is provided between a differential unit and drive wheels. The differential unit includes a motor-generator and a power split device, and the motor-generator is cooled by lubricant of the automatic transmission. A battery charger is operable to charge a power storage device using a power supply outside the vehicle. When the temperature of the lubricant is lower than a predetermined temperature upon execution of charging of the power storage device using the charger, and the automatic transmission is in a neutral state, or a power cutting-off state, the controller rotates the motor-generator of the differential unit so as to perform warming control for raising the temperature of the lubricant.

主权项

1. An electric vehicle, comprising:
a power storage device configured to store electric power used for running the electric vehicle; a first electric motor configured to receive electric power from the power storage device, the first electric motor being configured to generate power; a power transmitting device provided between the first electric motor and drive wheels, the power transmitting device being configured to selectively permit and inhibit power transmission between the first electric motor and the drive wheels, the first electric motor being configured to be cooled by lubricant of the power transmitting device; a charging device configured to charge the power storage device using a power supply located outside of the electric vehicle; and a controller configured to perform warming control for raising a temperature of the lubricant by rotating the first electric motor, when the temperature of the lubricant is lower than a predetermined temperature at the time of execution of charging of the power storage device using the charging device and when the power transmitting device is in a power cutting-off state in which the power transmission is inhibited.