| 摘要 |
PURPOSE:To improve control accuracy by changing a relation of a line pressure relating to a duty oil pressure or a duty oil pressure corresponding pressure, and using the relatively high duty oil pressure or duty oil pressure corresponding pressure. CONSTITUTION:Since a line pressure acting in a gain change port 112, in a predetermined speed change shift, is matched with a duty oil pressure or a duty oil pressure corresponding pressure acting in a pilot port 126 with a line pressure acting in a feedback port 114, the line pressure obtains a relatively low value relating to the relatively high duty oil pressure or duty oil pressure corresponding pressure. Accordingly, even in a condition that a low oil pressure is governed, the duty oil pressure or duty oil pressure corresponding pressure obtains a relatively high value, and duty ratio, given to a solenoid 97, obtains a relatively large value. In this way, stable control of the oil pressure can be performed by improving control accuracy. |
