摘要 |
A hydraulic control device determines whether the transmission is being shifted down, and upon determination of the shift-down action, determines whether the vehicle is in a power-on condition or in a power-off condition. Upon determination of the power-off condition, the hydraulic control device regulates the control oil pressure applied to the engaging element, such that the oil pressure is rapidly increased from the beginning of a shifting process, and is maintained at a high level until the shifting process is about to be completed. Upon determination of the power-on condition, the control device regulates the control oil pressure such that the oil pressure is maintained at a low level from the beginning of the shifting process, and is increased just before completion of the shifting process.
|