Patent ID: 7997364

Claim:
A hybrid vehicle, comprising: an internal combustion engine; an electric power-mechanical power input output assembly connected with a driveshaft linked to an axle of the hybrid vehicle and with an output shaft of the internal combustion engine in such a manner as to be rotatable independently of the driveshaft and configured to input and output power to and from the driveshaft and the output shaft through input and output of electric power and mechanical power; a motor constructed to input and output a power for driving the hybrid vehicle; an accumulator designed to be chargeable and dischargeable; a voltage adjustment-power transmission structure connected with the electric power-mechanical power input output assembly and with the motor, linked with the accumulator, and configured to adjust a voltage on a drive system side toward the electric power-mechanical power input output assembly and the motor and a voltage on an accumulator side toward the accumulator and thereby allow transmission of electric power between the drive system side and the accumulator side; a vehicle speed detector constructed to detect a vehicle speed of the hybrid vehicle; a driving force demand setting module configured to set a driving force demand required for driving the hybrid vehicle; and a controller configured to, when the detected vehicle speed is lower than a preset reference vehicle speed, control the voltage adjustment-power transmission structure to adjust the voltage on the drive system side to be not higher than a first voltage, which is less than an allowable maximum voltage set based on rated values of the electric power-mechanical power input output assembly and the motor, while controlling the internal combustion engine, the electric power-mechanical power input output assembly, and the motor to drive the hybrid vehicle with a driving force equivalent to the set driving force demand, and when the detected vehicle speed is not lower than the preset reference vehicle speed, the controller controlling the voltage adjustment-power transmission structure to adjust the voltage on the drive system side to be not higher than the allowable maximum voltage, while controlling the internal combustion engine, the electric power-mechanical power input output assembly, and the motor to drive the hybrid vehicle with a driving force equivalent to the set driving force demand.