| 摘要 |
PURPOSE:To maintain a constant shift state in the stationary situation and concurrently satisfy the responsiveness and convergent property for a shift by providing a primary pressure control valve and a flow control valve on an oil pressure control system controlling the secondary pressure and guiding it to a primary cylinder. CONSTITUTION:When shift start conditions are met by operating and running conditions and the target shift ratio is set small in sequence, the pulley position change speed is calculated by a flow control system, the duty ratio of the sole noid current Iq is increased to about 50% or above, and the oil feed quantity to a primary cylinder 21 is increased. When the actual shift ratio is decreased, the oil pressure ratio of the oil pressure ratio control system is set large, the target primary pressure Pp against the secondary pressure Ps is calculated high, and the primary pressure Pp is increased by the solenoid current Ip. When the target shift ratio is set large at the time of acceleration or deceleration, the flow control system is operated, when the actual shift ratio (i) is increased, the oil pressure ratio control system is operated. |
