| 摘要 |
<P>PROBLEM TO BE SOLVED: To change the gear change ratio of a gear change transmission in which the transmission of the power from the rotary shaft of a motor to a drive shaft is performed at a changeable gear change ratio, more properly, by considering the charging/discharging power of an electric storage unit, such as a secondary battery, etc., or considering the drive state of the motor. <P>SOLUTION: In a power output device, the output shaft of an engine is connected to the drive shaft coupled to an axle through a planetary gear mechanism, a generator is connected to the rotary element of the planetary gear mechanism, and the gear change of the transmission of the power output device in which the motor is connected to the drive shaft through the transmission is switched when a vehicle speed V, the required torque Tr* required to the drive shaft and the torque outputted from the motor to the power which charges and discharges the battery become near a value "0" at a positive side. Thus, the gear change of the transmission can be performed more properly. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
