| 摘要 |
PURPOSE:To enhance the fuel efficiency in the acceleration of a vehicle, by suppressing the change in velocity ratio for the period from the time when the revolution speed of an engine exceeds a margin-allowing output power level, to the time when the revolution speed reaches an aimed level. CONSTITUTION:A controller for a continuously variable transmission is provided with a margin-allowing output power level determination means, a vehicle speed detection means, a velocity ratio change suppression judgment level determination means, a velocity ratio change rate suppression means, and a control target change means. The revolution speed of an engine is increased in the acceleration of a vehicle, as the change in the velocity ratio of the said transmission is suppressed, for the period from the time when the revolution speed of an engine exceeds a margin-allowing output power level, to the time when the revolution speed reaches an aimed level. For that reason, the output power of the engine is transmitted as the change in the velocity ratio of the said transmission is greatly suppressed. Therefore, the efficiency of the transmission of the engine output power is prevented from falling due to the change in the velocity ratio, so that a high fuel efficiency is attained even in the acceleration of the vehicle. |
