| 摘要 |
PURPOSE:To enable the restraining of creep torque at a low level via simple control by setting a gear change limit region in the low gear ratio side of a continuously variable transmission device at least in a fine throttle opening or less. CONSTITUTION:In the gear change region of a continuously variable transmission device 20 set within an electronic control device 47, there is provided a gear change limit region shown by a hatching area A. As a result, the continuously variable transmission device 20 is unable to shift a gear from an intermediate gear ratio to a low gear ratio in a fine throttle opening, and as a throttle opening B increases, the gear change limit region gradually becomes small. Finally, it becomes possible to shift a gear over the entire range of a lowest gear ratio to a maximum gear ratio at the throttle opening of 2/4 or more. By setting the gear change limit region as aforementioned, the continuously variable transmission device 20 is maintained at an intermediate gear ratio during idling as in creeping, and creep torque generated by a torque converter 3 is not amplified by the continuously variable transmission device 20. Consequently, creep torque transmitted to an axle becomes small. |
