| 摘要 |
In a high-load/low-vehicle velocity range that requires a torque-up effect of a torque converter (4) and shock absorption effect during transmission, the converter range is selected, and a lockup clutch (36) is fully released. On the other hand, in a low-load/high-vehicle velocity range that does not so require a shock absorption effect, the lockup range is selected, and the lockup clutch 36 is fully locked up to improve the mileage of an engine (3). Furthermore, in a low-load/low-vehicle velocity range, the slip range is selected, and the slip control for controlling the slip amount of the lockup clutch (36) to converge to a predetermined target slip amount is done, thus balancing between the torque-up effect, shock absorption effect, and the mileage. The lockup control includes also road gradient detection means and releases the lockup clutch when the upward gradient is greater than a predetermined value. <IMAGE> |
