| 摘要 |
PROBLEM TO BE SOLVED: To stabilize the response of an engagement hydraulic pressure to a friction engagement device, while suppressing the power consumption of a solenoid valve device.SOLUTION: During non-shift operation when a predetermined gear stage GS of an automatic transmission 10 is kept, the hydraulic pressure control device increases the engagement hydraulic pressure Pto the friction engagement device associated with gear stage GS formation by a hydraulic control means 104 by a predetermined hydraulic pressure C with respect to a line hydraulic pressure PL. Therefore, in comparison with the case where a hydraulic pressure equivalent to the line hydraulic pressure PL is set as the engagement hydraulic pressure Pto the friction engagement device for obtaining a hydraulic pressure equivalent to the line pressure PL, shift response (hydraulic pressure response) variations at shift from a non-shift state (steady state) into a shift state are suppressed by the margin of the predetermined hydraulic pressure C. In addition, in comparison with the case where the engagement hydraulic pressure Pto the friction engagement device is set to a maximum hydraulic pressure Pto reduce the response variations, power consumption of a linear solenoid valve SL is suppressed. |
