| 摘要 |
<P>PROBLEM TO BE SOLVED: To suppress reduction of transmission efficiency when a temperature of a transmission part is low, in a controller for a vehicular driving device having a first transmission part connected to an engine and a second transmission part constituting a part of a power transmission route in a rear stage of the first transmission part, set with a total speed change ratio by a speed change ratio of the two transmission parts. <P>SOLUTION: When the temperature of the transmission part is low, for example, a speed change ratio of a continuously variable transmission part that is the second transmission part is changed to a high gear side, and a speed change ratio of an electric differential part that is the first transmission part is changed to a low gear side, and operation is performed in a state out of a mileage optimum operation point. When performing such speed change ratio control, heating values in the transmission parts increase as compared to the case that the operation is performed at the mileage optimum operating point, warming-up of the transmission parts is easy to be promoted to improve the transmission efficiency. <P>COPYRIGHT: (C)2010,JPO&INPIT |
