Patent ID: 7399257

Claim:
A system for controlling an automatic transmission, comprising: a start clutch; an engagement element arranged in series to the start clutch, the engagement element being engaged during vehicle driving; and an electronic control unit (ECU) which controls the start clutch and the engagement element, the ECU being programmed to select, at vehicle start, one of the start clutch and the engagement element in accordance with one of an oil temperature within the transmission and a throttle-valve opening, wherein the ECU is further programmed to: determine whether or not the oil temperature is smaller than a predetermined value; set, when it is determined that the oil temperature is smaller than the predetermined value, a driver's selected shift range is a drive range, and an accelerator fails to be depressed, an engagement torque capacity of the engagement element at a first value required for creep; and set, when it is determined that the oil temperature is smaller than the predetermined value, the driver's selected shift range is the drive range, and the accelerator is depressed, at least the engagement torque capacity of the engagement element at a second value greater than an input torque.