Patent ID: 9267598
Filing Date: 2016-02-23
CPC Classification: F16D,F16H

Claim Text:
1. A control method for an automatic transmission including a plurality of friction elements that change a power transmission route of a transmission mechanism according to an operation state, a starting gear shift stage being attained by fastening a predetermined brake element and a predetermined clutch element among the friction elements, with automatic transmission not being provided with a one-way clutch, the control method comprising: a command detecting step of detecting a command for, from a state in which the clutch element and the brake element are released and in which transmission of power is not performed between an engine side and a wheel side of the transmission mechanism, fastening the friction elements to attain the starting gear shift stage; a clutch element fastening step of supplying, when the command is detected in the command detecting step, hydraulic pressure to the clutch elements thereby fastening the clutch elements; and a rotation control step of supplying, after the clutch element fastening step, the hydraulic pressure to the brake elements thereby starting the fastening of the brake elements and controlling rotation which is input to the transmission mechanism via the clutch elements.