| 摘要 |
<P>PROBLEM TO BE SOLVED: To improve a mileage while ensuring driving force on an uphill road at the start of a vehicle. <P>SOLUTION: Since a target gear ratio (target input rotation speed Nint) at the stop of the vehicle is set to a larger ratio as a road gradient becomes larger, speed change timing (L/U-off vehicle speed Vs0, Vs1) can be delayed when the road gradient is small such as on a flat road or a gradual uphill road. Thus, a range in which a gear ratio can be maintained at a Hi side can be widened and the mileage can be improved. In addition, when the road gradient is large, such as a steep uphill road, the driving force at the start of the vehicle can be ensured by setting the gear ratio at the stop of the vehicle to a maximum gear ratio γmax and therefore the mileage can be improved while ensuring the driving force on the uphill road at the start of the vehicle. <P>COPYRIGHT: (C)2012,JPO&INPIT |
