| 摘要 |
PROBLEM TO BE SOLVED: To discharge the air mixed in a hydraulic circuit without impairing the response to operating control and causing dragging in a frictional engagement device. SOLUTION: When a low-speed stage L is continued for a predetermined time (S1), a shift-up line is changed to one for discharging air (S2). Since the probability that the shift stage is changed to a high-speed stage H even during traveling on general roads is increased, the change to the high-speed stage H is determined, and a hydraulic pressure is supplied to engage a first brake B1. As a result, the air in the hydraulic circuit of the first brake B1 which is not almost engaged during the traveling on general roads is discharged. COPYRIGHT: (C)2007,JPO&INPIT |
