Power-generation control device and power-generation control method for hybrid vehicle

摘要

Provided is a power-generation control device and a power-generation control method for a hybrid vehicle, which are capable of suppressing a temperature rise of an electric motor while controlling a field-weakening current to flow through the electric motor to protect the electric motor and a battery even when an induced voltage increased by an increase in rpm of the electric motor exceeds an allowable voltage of the battery. Power generation by an electric motor is stopped when a voltage of a battery is equal to or higher than a predetermined first voltage, and an in-vehicle electric load is supplied with power generated by the electric motor and a power-generation amount by the electric motor is controlled so that the voltage of the battery becomes equal to a predetermined second voltage, when the voltage of the battery is lower than the predetermined second voltage.

主权项

1. A power-generation control device for a hybrid vehicle, comprising:
a central processing unit (CPU) to control a power-generation system of the hybrid vehicle, the power-generation system comprising: an internal combustion engine; an electric motor coupled to an output shaft of the internal combustion engine, which is capable of generating power; a battery to store the power generated by the electric motor; and an in-vehicle electric load to be supplied with the power from the battery; and a battery-state detector device to detect a voltage of the battery, wherein the CPU stops the power generation by the electric motor when the detected voltage of the battery is greater than or equal to a first reference voltage that corresponds to a first temperature of the electric motor, and wherein the CPU supplies the in-vehicle electric load with the power generated by the electric motor and controls a power-generation amount by the electric motor so that the detected voltage of the battery becomes equal to a second reference voltage, which is less than predetermined first reference voltage, when the detected voltage of the battery is less than the second reference voltage that corresponds to a second temperature of the electric motor.