| 摘要 |
<P>PROBLEM TO BE SOLVED: To restrain an electric motor from being driven in excess of an upper limit rotational speed without impairing driving feeling. <P>SOLUTION: In an automobile in which an engine, a generator, and a driving shaft are connected to each rotating element of a planetary gear mechanism, and the electric motor is connected to the driving shaft through a transmission, if the transmission cannot be switched to an Hi gear from an Lo gear (the Lo gear fixed), a hysteresis is provided to a vehicle speed V on the decrease side of the vehicle speed V and an automobile speed Vhis is set after the hysteresis processing without providing the hysteresis on the increase side of the automobile speed V (S140 to S180). After the hysteresis processing, a request torque Tr* of the driving shaft is limited by a torque upper limit value Trmax on the basis of the automobile speed Vhis to control the engine, the generator and the electric motor. Thereby, the torque upper limit value Trmax is not frequently changed against a slight change on the decrease side of the automobile speed Vto, thus restraining the electric motor from being driven in excess of the upper limit rotational speed without impairing the driving feeling. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
